<?xml version="1.0" encoding="US-ASCII"?>
<!-- Generated by DFIN XBRL Schema Document - http://www.dfinsolutions.com/ - on 28-04-2026 04:59:29 AM -->
<!-- Copyright(c) 2026 Donnelley Financial Solutions, Inc. All Rights Reserved. -->
<xs:schema targetNamespace="http://www.williamblairfunds.com/20260429" xmlns:xs="http://www.w3.org/2001/XMLSchema" xmlns:wbf="http://www.williamblairfunds.com/20260429" xmlns:fnd="http://xbrl.sec.gov/fnd-oef/2025" xmlns:dei="http://xbrl.sec.gov/dei/2025" xmlns:srt-types="http://fasb.org/srt-types/2025"  xmlns:deprecated="http://www.xbrl.org/2009/role/deprecated" xmlns:dtr="http://www.xbrl.org/2009/dtr" xmlns:oef="http://xbrl.sec.gov/oef/2025" xmlns:ref="http://www.xbrl.org/2006/ref" xmlns:xbrldt="http://xbrl.org/2005/xbrldt" xmlns:xl="http://www.xbrl.org/2003/XLink" xmlns:us-gaap="http://fasb.org/us-gaap/2025" xmlns:country-def="http://xbrl.sec.gov/country-def/2025" xmlns:oef-cal="http://xbrl.sec.gov/oef-cal/2025" xmlns:oef-lab="http://xbrl.sec.gov/oef-lab/2025" xmlns:link="http://www.xbrl.org/2003/linkbase" xmlns:country="http://xbrl.sec.gov/country/2025" xmlns:enum2="http://xbrl.org/2020/extensible-enumerations-2.0" xmlns:us-roles="http://fasb.org/us-roles/2025" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:us-types="http://fasb.org/us-types/2025" xmlns:dtr-types="http://www.xbrl.org/dtr/type/2024-01-31" xmlns:xbrldi="http://xbrl.org/2006/xbrldi" xmlns:srt="http://fasb.org/srt/2025" xmlns:negated="http://www.xbrl.org/2009/role/negated" xmlns:srt-roles="http://fasb.org/srt-roles/2025" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xbrli="http://www.xbrl.org/2003/instance"  elementFormDefault="qualified">
   <xs:import namespace="http://www.xbrl.org/2003/instance" schemaLocation="http://www.xbrl.org/2003/xbrl-instance-2003-12-31.xsd"/>
   <xs:import namespace="http://www.xbrl.org/2003/linkbase" schemaLocation="http://www.xbrl.org/2003/xbrl-linkbase-2003-12-31.xsd"/>
   <xs:import namespace="http://xbrl.org/2005/xbrldt" schemaLocation="http://www.xbrl.org/2005/xbrldt-2005.xsd"/>
   <xs:import namespace="http://www.xbrl.org/dtr/type/2024-01-31" schemaLocation="https://www.xbrl.org/dtr/type/2024-01-31/types.xsd"/>
   <xs:import namespace="http://xbrl.sec.gov/oef-rr/2025" schemaLocation="https://xbrl.sec.gov/oef/2025/oef-rr-2025.xsd"/>
   <xs:import namespace="http://xbrl.sec.gov/oef-lab/2025" schemaLocation="https://xbrl.sec.gov/oef/2025/oef-2025_lab.xsd"/>
   <xs:import namespace="http://xbrl.sec.gov/dei/2025" schemaLocation="https://xbrl.sec.gov/dei/2025/dei-2025.xsd"/>
   <xs:import namespace="http://xbrl.sec.gov/oef/2025" schemaLocation="https://xbrl.sec.gov/oef/2025/oef-2025.xsd"/>
   <xs:import namespace="http://xbrl.sec.gov/fnd-oef/2025" schemaLocation="https://xbrl.sec.gov/fnd/2025/fnd-oef-2025.xsd"/> 
   <xs:annotation>
      <xs:appinfo>
      
        <link:roleType roleURI="http://www.williamblairfunds.com/1/role/RiskReturn" id="wwwwilliamblairfundscom_1_RiskReturn">
			<link:definition>110002 - Disclosure - S000008594 [Member] Investment Objectives and Goals</link:definition>
			<link:usedOn>link:presentationLink</link:usedOn>
			<link:usedOn>link:definitionLink</link:usedOn>
			<link:usedOn>link:calculationLink</link:usedOn>
		</link:roleType>
		<link:roleType roleURI="http://www.williamblairfunds.com/1/role/FeesAndExpenses" id="wwwwilliamblairfundscom_1_FeesAndExpenses">
			<link:definition>110003 - Disclosure - S000008594 [Member] Fees and Expenses</link:definition>
			<link:usedOn>link:presentationLink</link:usedOn>
			<link:usedOn>link:definitionLink</link:usedOn>
			<link:usedOn>link:calculationLink</link:usedOn>
		</link:roleType>
		<link:roleType roleURI="http://www.williamblairfunds.com/1/role/InvestmentStrategy" id="wwwwilliamblairfundscom_1_InvestmentStrategy">
			<link:definition>110004 - Disclosure - S000008594 [Member] Investment Strategy</link:definition>
			<link:usedOn>link:presentationLink</link:usedOn>
			<link:usedOn>link:definitionLink</link:usedOn>
			<link:usedOn>link:calculationLink</link:usedOn>
		</link:roleType>
		<link:roleType roleURI="http://www.williamblairfunds.com/1/role/InvestmentRisks" id="wwwwilliamblairfundscom_1_InvestmentRisks">
			<link:definition>110005 - Disclosure - S000008594 [Member] Investment Risks</link:definition>
			<link:usedOn>link:presentationLink</link:usedOn>
			<link:usedOn>link:definitionLink</link:usedOn>
			<link:usedOn>link:calculationLink</link:usedOn>
		</link:roleType>
		<link:roleType roleURI="http://www.williamblairfunds.com/1/role/PerformanceManagement" id="wwwwilliamblairfundscom_1_PerformanceManagement">
			<link:definition>110006 - Disclosure - S000008594 [Member] Performance Management</link:definition>
			<link:usedOn>link:presentationLink</link:usedOn>
			<link:usedOn>link:definitionLink</link:usedOn>
			<link:usedOn>link:calculationLink</link:usedOn>
		</link:roleType>
		<link:roleType roleURI="http://www.williamblairfunds.com/1/role/ShareholderFeesData" id="wwwwilliamblairfundscom_1_ShareholderFeesData">
			<link:definition>120010 - Disclosure - S000008594 [Member] Shareholder Fees</link:definition>
			<link:usedOn>link:presentationLink</link:usedOn>
			<link:usedOn>link:definitionLink</link:usedOn>
			<link:usedOn>link:calculationLink</link:usedOn>
		</link:roleType>
		<link:roleType roleURI="http://www.williamblairfunds.com/1/role/OperatingExpensesData" id="wwwwilliamblairfundscom_1_OperatingExpensesData">
			<link:definition>120020 - Disclosure - S000008594 [Member] Annual Fund Operating Expenses</link:definition>
			<link:usedOn>link:presentationLink</link:usedOn>
			<link:usedOn>link:definitionLink</link:usedOn>
			<link:usedOn>link:calculationLink</link:usedOn>
		</link:roleType>
		<link:roleType roleURI="http://www.williamblairfunds.com/1/role/ExpenseExample" id="wwwwilliamblairfundscom_1_ExpenseExample">
			<link:definition>120030 - Disclosure - S000008594 [Member] Expense Example</link:definition>
			<link:usedOn>link:presentationLink</link:usedOn>
			<link:usedOn>link:definitionLink</link:usedOn>
			<link:usedOn>link:calculationLink</link:usedOn>
		</link:roleType>
		<link:roleType roleURI="http://www.williamblairfunds.com/1/role/ExpenseExampleNoRedemption" id="wwwwilliamblairfundscom_1_ExpenseExampleNoRedemption">
			<link:definition>120040 - Disclosure - S000008594 [Member] Expense Example, No Redemption</link:definition>
			<link:usedOn>link:presentationLink</link:usedOn>
			<link:usedOn>link:definitionLink</link:usedOn>
			<link:usedOn>link:calculationLink</link:usedOn>
		</link:roleType>
		<link:roleType roleURI="http://www.williamblairfunds.com/1/role/RiskTableData" id="wwwwilliamblairfundscom_1_RiskTableData">
			<link:definition>120045 - Disclosure - S000008594 [Member] Risks Data</link:definition>
			<link:usedOn>link:presentationLink</link:usedOn>
			<link:usedOn>link:definitionLink</link:usedOn>
			<link:usedOn>link:calculationLink</link:usedOn>
		</link:roleType>
		<link:roleType roleURI="http://www.williamblairfunds.com/1/role/BarChartData" id="wwwwilliamblairfundscom_1_BarChartData">
			<link:definition>120050 - Disclosure - S000008594 [Member] Annual Total Returns</link:definition>
			<link:usedOn>link:presentationLink</link:usedOn>
			<link:usedOn>link:definitionLink</link:usedOn>
			<link:usedOn>link:calculationLink</link:usedOn>
		</link:roleType>
		<link:roleType roleURI="http://www.williamblairfunds.com/1/role/PerformanceTableData" id="wwwwilliamblairfundscom_1_PerformanceTableData">
			<link:definition>120060 - Disclosure - S000008594 [Member] Average Annual Total Returns</link:definition>
			<link:usedOn>link:presentationLink</link:usedOn>
			<link:usedOn>link:definitionLink</link:usedOn>
			<link:usedOn>link:calculationLink</link:usedOn>
		</link:roleType>
		<link:roleType roleURI="http://www.williamblairfunds.com/1/role/MarketIndexPerformanceData" id="wwwwilliamblairfundscom_1_MarketIndexPerformanceData">
			<link:definition>120070 - Disclosure - S000008594 [Member] Market Index Performance</link:definition>
			<link:usedOn>link:presentationLink</link:usedOn>
			<link:usedOn>link:definitionLink</link:usedOn>
			<link:usedOn>link:calculationLink</link:usedOn>
		</link:roleType>
		<link:roleType roleURI="http://www.williamblairfunds.com/1/role/N1aCover" id="wwwwilliamblairfundscom_1_N1aCover">
			<link:definition>110000 - Disclosure - S000008594 [Member] N-1A Cover</link:definition>
			<link:usedOn>link:presentationLink</link:usedOn>
			<link:usedOn>link:definitionLink</link:usedOn>
			<link:usedOn>link:calculationLink</link:usedOn>
		</link:roleType>
		<link:roleType roleURI="http://www.williamblairfunds.com/1/role/N1aSupplement" id="wwwwilliamblairfundscom_1_N1aSupplement">
			<link:definition>110001 - Disclosure - S000008594 [Member] N-1A Supplement</link:definition>
			<link:usedOn>link:presentationLink</link:usedOn>
			<link:usedOn>link:definitionLink</link:usedOn>
			<link:usedOn>link:calculationLink</link:usedOn>
		</link:roleType>
		<link:roleType roleURI="http://www.williamblairfunds.com/2/role/RiskReturn" id="wwwwilliamblairfundscom_2_RiskReturn">
			<link:definition>210002 - Disclosure - S000008601 [Member] Investment Objectives and Goals</link:definition>
			<link:usedOn>link:presentationLink</link:usedOn>
			<link:usedOn>link:definitionLink</link:usedOn>
			<link:usedOn>link:calculationLink</link:usedOn>
		</link:roleType>
		<link:roleType roleURI="http://www.williamblairfunds.com/2/role/FeesAndExpenses" id="wwwwilliamblairfundscom_2_FeesAndExpenses">
			<link:definition>210003 - Disclosure - S000008601 [Member] Fees and Expenses</link:definition>
			<link:usedOn>link:presentationLink</link:usedOn>
			<link:usedOn>link:definitionLink</link:usedOn>
			<link:usedOn>link:calculationLink</link:usedOn>
		</link:roleType>
		<link:roleType roleURI="http://www.williamblairfunds.com/2/role/InvestmentStrategy" id="wwwwilliamblairfundscom_2_InvestmentStrategy">
			<link:definition>210004 - Disclosure - S000008601 [Member] Investment Strategy</link:definition>
			<link:usedOn>link:presentationLink</link:usedOn>
			<link:usedOn>link:definitionLink</link:usedOn>
			<link:usedOn>link:calculationLink</link:usedOn>
		</link:roleType>
		<link:roleType roleURI="http://www.williamblairfunds.com/2/role/InvestmentRisks" id="wwwwilliamblairfundscom_2_InvestmentRisks">
			<link:definition>210005 - Disclosure - S000008601 [Member] Investment Risks</link:definition>
			<link:usedOn>link:presentationLink</link:usedOn>
			<link:usedOn>link:definitionLink</link:usedOn>
			<link:usedOn>link:calculationLink</link:usedOn>
		</link:roleType>
		<link:roleType roleURI="http://www.williamblairfunds.com/2/role/PerformanceManagement" id="wwwwilliamblairfundscom_2_PerformanceManagement">
			<link:definition>210006 - Disclosure - S000008601 [Member] Performance Management</link:definition>
			<link:usedOn>link:presentationLink</link:usedOn>
			<link:usedOn>link:definitionLink</link:usedOn>
			<link:usedOn>link:calculationLink</link:usedOn>
		</link:roleType>
		<link:roleType roleURI="http://www.williamblairfunds.com/2/role/ShareholderFeesData" id="wwwwilliamblairfundscom_2_ShareholderFeesData">
			<link:definition>220010 - Disclosure - S000008601 [Member] Shareholder Fees</link:definition>
			<link:usedOn>link:presentationLink</link:usedOn>
			<link:usedOn>link:definitionLink</link:usedOn>
			<link:usedOn>link:calculationLink</link:usedOn>
		</link:roleType>
		<link:roleType roleURI="http://www.williamblairfunds.com/2/role/OperatingExpensesData" id="wwwwilliamblairfundscom_2_OperatingExpensesData">
			<link:definition>220020 - Disclosure - S000008601 [Member] Annual Fund Operating Expenses</link:definition>
			<link:usedOn>link:presentationLink</link:usedOn>
			<link:usedOn>link:definitionLink</link:usedOn>
			<link:usedOn>link:calculationLink</link:usedOn>
		</link:roleType>
		<link:roleType roleURI="http://www.williamblairfunds.com/2/role/ExpenseExample" id="wwwwilliamblairfundscom_2_ExpenseExample">
			<link:definition>220030 - Disclosure - S000008601 [Member] Expense Example</link:definition>
			<link:usedOn>link:presentationLink</link:usedOn>
			<link:usedOn>link:definitionLink</link:usedOn>
			<link:usedOn>link:calculationLink</link:usedOn>
		</link:roleType>
		<link:roleType roleURI="http://www.williamblairfunds.com/2/role/ExpenseExampleNoRedemption" id="wwwwilliamblairfundscom_2_ExpenseExampleNoRedemption">
			<link:definition>220040 - Disclosure - S000008601 [Member] Expense Example, No Redemption</link:definition>
			<link:usedOn>link:presentationLink</link:usedOn>
			<link:usedOn>link:definitionLink</link:usedOn>
			<link:usedOn>link:calculationLink</link:usedOn>
		</link:roleType>
		<link:roleType roleURI="http://www.williamblairfunds.com/2/role/RiskTableData" id="wwwwilliamblairfundscom_2_RiskTableData">
			<link:definition>220045 - Disclosure - S000008601 [Member] Risks Data</link:definition>
			<link:usedOn>link:presentationLink</link:usedOn>
			<link:usedOn>link:definitionLink</link:usedOn>
			<link:usedOn>link:calculationLink</link:usedOn>
		</link:roleType>
		<link:roleType roleURI="http://www.williamblairfunds.com/2/role/BarChartData" id="wwwwilliamblairfundscom_2_BarChartData">
			<link:definition>220050 - Disclosure - S000008601 [Member] Annual Total Returns</link:definition>
			<link:usedOn>link:presentationLink</link:usedOn>
			<link:usedOn>link:definitionLink</link:usedOn>
			<link:usedOn>link:calculationLink</link:usedOn>
		</link:roleType>
		<link:roleType roleURI="http://www.williamblairfunds.com/2/role/PerformanceTableData" id="wwwwilliamblairfundscom_2_PerformanceTableData">
			<link:definition>220060 - Disclosure - S000008601 [Member] Average Annual Total Returns</link:definition>
			<link:usedOn>link:presentationLink</link:usedOn>
			<link:usedOn>link:definitionLink</link:usedOn>
			<link:usedOn>link:calculationLink</link:usedOn>
		</link:roleType>
		<link:roleType roleURI="http://www.williamblairfunds.com/2/role/MarketIndexPerformanceData" id="wwwwilliamblairfundscom_2_MarketIndexPerformanceData">
			<link:definition>220070 - Disclosure - S000008601 [Member] Market Index Performance</link:definition>
			<link:usedOn>link:presentationLink</link:usedOn>
			<link:usedOn>link:definitionLink</link:usedOn>
			<link:usedOn>link:calculationLink</link:usedOn>
		</link:roleType>
		<link:roleType roleURI="http://www.williamblairfunds.com/2/role/N1aCover" id="wwwwilliamblairfundscom_2_N1aCover">
			<link:definition>210000 - Disclosure - S000008601 [Member] N-1A Cover</link:definition>
			<link:usedOn>link:presentationLink</link:usedOn>
			<link:usedOn>link:definitionLink</link:usedOn>
			<link:usedOn>link:calculationLink</link:usedOn>
		</link:roleType>
		<link:roleType roleURI="http://www.williamblairfunds.com/2/role/N1aSupplement" id="wwwwilliamblairfundscom_2_N1aSupplement">
			<link:definition>210001 - Disclosure - S000008601 [Member] N-1A Supplement</link:definition>
			<link:usedOn>link:presentationLink</link:usedOn>
			<link:usedOn>link:definitionLink</link:usedOn>
			<link:usedOn>link:calculationLink</link:usedOn>
		</link:roleType>
		<link:roleType roleURI="http://www.williamblairfunds.com/3/role/RiskReturn" id="wwwwilliamblairfundscom_3_RiskReturn">
			<link:definition>310002 - Disclosure - S000075391 [Member] Investment Objectives and Goals</link:definition>
			<link:usedOn>link:presentationLink</link:usedOn>
			<link:usedOn>link:definitionLink</link:usedOn>
			<link:usedOn>link:calculationLink</link:usedOn>
		</link:roleType>
		<link:roleType roleURI="http://www.williamblairfunds.com/3/role/FeesAndExpenses" id="wwwwilliamblairfundscom_3_FeesAndExpenses">
			<link:definition>310003 - Disclosure - S000075391 [Member] Fees and Expenses</link:definition>
			<link:usedOn>link:presentationLink</link:usedOn>
			<link:usedOn>link:definitionLink</link:usedOn>
			<link:usedOn>link:calculationLink</link:usedOn>
		</link:roleType>
		<link:roleType roleURI="http://www.williamblairfunds.com/3/role/InvestmentStrategy" id="wwwwilliamblairfundscom_3_InvestmentStrategy">
			<link:definition>310004 - Disclosure - S000075391 [Member] Investment Strategy</link:definition>
			<link:usedOn>link:presentationLink</link:usedOn>
			<link:usedOn>link:definitionLink</link:usedOn>
			<link:usedOn>link:calculationLink</link:usedOn>
		</link:roleType>
		<link:roleType roleURI="http://www.williamblairfunds.com/3/role/InvestmentRisks" id="wwwwilliamblairfundscom_3_InvestmentRisks">
			<link:definition>310005 - Disclosure - S000075391 [Member] Investment Risks</link:definition>
			<link:usedOn>link:presentationLink</link:usedOn>
			<link:usedOn>link:definitionLink</link:usedOn>
			<link:usedOn>link:calculationLink</link:usedOn>
		</link:roleType>
		<link:roleType roleURI="http://www.williamblairfunds.com/3/role/PerformanceManagement" id="wwwwilliamblairfundscom_3_PerformanceManagement">
			<link:definition>310006 - Disclosure - S000075391 [Member] Performance Management</link:definition>
			<link:usedOn>link:presentationLink</link:usedOn>
			<link:usedOn>link:definitionLink</link:usedOn>
			<link:usedOn>link:calculationLink</link:usedOn>
		</link:roleType>
		<link:roleType roleURI="http://www.williamblairfunds.com/3/role/ShareholderFeesData" id="wwwwilliamblairfundscom_3_ShareholderFeesData">
			<link:definition>320010 - Disclosure - S000075391 [Member] Shareholder Fees</link:definition>
			<link:usedOn>link:presentationLink</link:usedOn>
			<link:usedOn>link:definitionLink</link:usedOn>
			<link:usedOn>link:calculationLink</link:usedOn>
		</link:roleType>
		<link:roleType roleURI="http://www.williamblairfunds.com/3/role/OperatingExpensesData" id="wwwwilliamblairfundscom_3_OperatingExpensesData">
			<link:definition>320020 - Disclosure - S000075391 [Member] Annual Fund Operating Expenses</link:definition>
			<link:usedOn>link:presentationLink</link:usedOn>
			<link:usedOn>link:definitionLink</link:usedOn>
			<link:usedOn>link:calculationLink</link:usedOn>
		</link:roleType>
		<link:roleType roleURI="http://www.williamblairfunds.com/3/role/ExpenseExample" id="wwwwilliamblairfundscom_3_ExpenseExample">
			<link:definition>320030 - Disclosure - S000075391 [Member] Expense Example</link:definition>
			<link:usedOn>link:presentationLink</link:usedOn>
			<link:usedOn>link:definitionLink</link:usedOn>
			<link:usedOn>link:calculationLink</link:usedOn>
		</link:roleType>
		<link:roleType roleURI="http://www.williamblairfunds.com/3/role/ExpenseExampleNoRedemption" id="wwwwilliamblairfundscom_3_ExpenseExampleNoRedemption">
			<link:definition>320040 - Disclosure - S000075391 [Member] Expense Example, No Redemption</link:definition>
			<link:usedOn>link:presentationLink</link:usedOn>
			<link:usedOn>link:definitionLink</link:usedOn>
			<link:usedOn>link:calculationLink</link:usedOn>
		</link:roleType>
		<link:roleType roleURI="http://www.williamblairfunds.com/3/role/RiskTableData" id="wwwwilliamblairfundscom_3_RiskTableData">
			<link:definition>320045 - Disclosure - S000075391 [Member] Risks Data</link:definition>
			<link:usedOn>link:presentationLink</link:usedOn>
			<link:usedOn>link:definitionLink</link:usedOn>
			<link:usedOn>link:calculationLink</link:usedOn>
		</link:roleType>
		<link:roleType roleURI="http://www.williamblairfunds.com/3/role/BarChartData" id="wwwwilliamblairfundscom_3_BarChartData">
			<link:definition>320050 - Disclosure - S000075391 [Member] Annual Total Returns</link:definition>
			<link:usedOn>link:presentationLink</link:usedOn>
			<link:usedOn>link:definitionLink</link:usedOn>
			<link:usedOn>link:calculationLink</link:usedOn>
		</link:roleType>
		<link:roleType roleURI="http://www.williamblairfunds.com/3/role/PerformanceTableData" id="wwwwilliamblairfundscom_3_PerformanceTableData">
			<link:definition>320060 - Disclosure - S000075391 [Member] Average Annual Total Returns</link:definition>
			<link:usedOn>link:presentationLink</link:usedOn>
			<link:usedOn>link:definitionLink</link:usedOn>
			<link:usedOn>link:calculationLink</link:usedOn>
		</link:roleType>
		<link:roleType roleURI="http://www.williamblairfunds.com/3/role/MarketIndexPerformanceData" id="wwwwilliamblairfundscom_3_MarketIndexPerformanceData">
			<link:definition>320070 - Disclosure - S000075391 [Member] Market Index Performance</link:definition>
			<link:usedOn>link:presentationLink</link:usedOn>
			<link:usedOn>link:definitionLink</link:usedOn>
			<link:usedOn>link:calculationLink</link:usedOn>
		</link:roleType>
		<link:roleType roleURI="http://www.williamblairfunds.com/3/role/N1aCover" id="wwwwilliamblairfundscom_3_N1aCover">
			<link:definition>310000 - Disclosure - S000075391 [Member] N-1A Cover</link:definition>
			<link:usedOn>link:presentationLink</link:usedOn>
			<link:usedOn>link:definitionLink</link:usedOn>
			<link:usedOn>link:calculationLink</link:usedOn>
		</link:roleType>
		<link:roleType roleURI="http://www.williamblairfunds.com/3/role/N1aSupplement" id="wwwwilliamblairfundscom_3_N1aSupplement">
			<link:definition>310001 - Disclosure - S000075391 [Member] N-1A Supplement</link:definition>
			<link:usedOn>link:presentationLink</link:usedOn>
			<link:usedOn>link:definitionLink</link:usedOn>
			<link:usedOn>link:calculationLink</link:usedOn>
		</link:roleType>
		<link:roleType roleURI="http://www.williamblairfunds.com/4/role/RiskReturn" id="wwwwilliamblairfundscom_4_RiskReturn">
			<link:definition>410002 - Disclosure - S000066499 [Member] Investment Objectives and Goals</link:definition>
			<link:usedOn>link:presentationLink</link:usedOn>
			<link:usedOn>link:definitionLink</link:usedOn>
			<link:usedOn>link:calculationLink</link:usedOn>
		</link:roleType>
		<link:roleType roleURI="http://www.williamblairfunds.com/4/role/FeesAndExpenses" id="wwwwilliamblairfundscom_4_FeesAndExpenses">
			<link:definition>410003 - Disclosure - S000066499 [Member] Fees and Expenses</link:definition>
			<link:usedOn>link:presentationLink</link:usedOn>
			<link:usedOn>link:definitionLink</link:usedOn>
			<link:usedOn>link:calculationLink</link:usedOn>
		</link:roleType>
		<link:roleType roleURI="http://www.williamblairfunds.com/4/role/InvestmentStrategy" id="wwwwilliamblairfundscom_4_InvestmentStrategy">
			<link:definition>410004 - Disclosure - S000066499 [Member] Investment Strategy</link:definition>
			<link:usedOn>link:presentationLink</link:usedOn>
			<link:usedOn>link:definitionLink</link:usedOn>
			<link:usedOn>link:calculationLink</link:usedOn>
		</link:roleType>
		<link:roleType roleURI="http://www.williamblairfunds.com/4/role/InvestmentRisks" id="wwwwilliamblairfundscom_4_InvestmentRisks">
			<link:definition>410005 - Disclosure - S000066499 [Member] Investment Risks</link:definition>
			<link:usedOn>link:presentationLink</link:usedOn>
			<link:usedOn>link:definitionLink</link:usedOn>
			<link:usedOn>link:calculationLink</link:usedOn>
		</link:roleType>
		<link:roleType roleURI="http://www.williamblairfunds.com/4/role/PerformanceManagement" id="wwwwilliamblairfundscom_4_PerformanceManagement">
			<link:definition>410006 - Disclosure - S000066499 [Member] Performance Management</link:definition>
			<link:usedOn>link:presentationLink</link:usedOn>
			<link:usedOn>link:definitionLink</link:usedOn>
			<link:usedOn>link:calculationLink</link:usedOn>
		</link:roleType>
		<link:roleType roleURI="http://www.williamblairfunds.com/4/role/ShareholderFeesData" id="wwwwilliamblairfundscom_4_ShareholderFeesData">
			<link:definition>420010 - Disclosure - S000066499 [Member] Shareholder Fees</link:definition>
			<link:usedOn>link:presentationLink</link:usedOn>
			<link:usedOn>link:definitionLink</link:usedOn>
			<link:usedOn>link:calculationLink</link:usedOn>
		</link:roleType>
		<link:roleType roleURI="http://www.williamblairfunds.com/4/role/OperatingExpensesData" id="wwwwilliamblairfundscom_4_OperatingExpensesData">
			<link:definition>420020 - Disclosure - S000066499 [Member] Annual Fund Operating Expenses</link:definition>
			<link:usedOn>link:presentationLink</link:usedOn>
			<link:usedOn>link:definitionLink</link:usedOn>
			<link:usedOn>link:calculationLink</link:usedOn>
		</link:roleType>
		<link:roleType roleURI="http://www.williamblairfunds.com/4/role/ExpenseExample" id="wwwwilliamblairfundscom_4_ExpenseExample">
			<link:definition>420030 - Disclosure - S000066499 [Member] Expense Example</link:definition>
			<link:usedOn>link:presentationLink</link:usedOn>
			<link:usedOn>link:definitionLink</link:usedOn>
			<link:usedOn>link:calculationLink</link:usedOn>
		</link:roleType>
		<link:roleType roleURI="http://www.williamblairfunds.com/4/role/ExpenseExampleNoRedemption" id="wwwwilliamblairfundscom_4_ExpenseExampleNoRedemption">
			<link:definition>420040 - Disclosure - S000066499 [Member] Expense Example, No Redemption</link:definition>
			<link:usedOn>link:presentationLink</link:usedOn>
			<link:usedOn>link:definitionLink</link:usedOn>
			<link:usedOn>link:calculationLink</link:usedOn>
		</link:roleType>
		<link:roleType roleURI="http://www.williamblairfunds.com/4/role/RiskTableData" id="wwwwilliamblairfundscom_4_RiskTableData">
			<link:definition>420045 - Disclosure - S000066499 [Member] Risks Data</link:definition>
			<link:usedOn>link:presentationLink</link:usedOn>
			<link:usedOn>link:definitionLink</link:usedOn>
			<link:usedOn>link:calculationLink</link:usedOn>
		</link:roleType>
		<link:roleType roleURI="http://www.williamblairfunds.com/4/role/BarChartData" id="wwwwilliamblairfundscom_4_BarChartData">
			<link:definition>420050 - Disclosure - S000066499 [Member] Annual Total Returns</link:definition>
			<link:usedOn>link:presentationLink</link:usedOn>
			<link:usedOn>link:definitionLink</link:usedOn>
			<link:usedOn>link:calculationLink</link:usedOn>
		</link:roleType>
		<link:roleType roleURI="http://www.williamblairfunds.com/4/role/PerformanceTableData" id="wwwwilliamblairfundscom_4_PerformanceTableData">
			<link:definition>420060 - Disclosure - S000066499 [Member] Average Annual Total Returns</link:definition>
			<link:usedOn>link:presentationLink</link:usedOn>
			<link:usedOn>link:definitionLink</link:usedOn>
			<link:usedOn>link:calculationLink</link:usedOn>
		</link:roleType>
		<link:roleType roleURI="http://www.williamblairfunds.com/4/role/MarketIndexPerformanceData" id="wwwwilliamblairfundscom_4_MarketIndexPerformanceData">
			<link:definition>420070 - Disclosure - S000066499 [Member] Market Index Performance</link:definition>
			<link:usedOn>link:presentationLink</link:usedOn>
			<link:usedOn>link:definitionLink</link:usedOn>
			<link:usedOn>link:calculationLink</link:usedOn>
		</link:roleType>
		<link:roleType roleURI="http://www.williamblairfunds.com/4/role/N1aCover" id="wwwwilliamblairfundscom_4_N1aCover">
			<link:definition>410000 - Disclosure - S000066499 [Member] N-1A Cover</link:definition>
			<link:usedOn>link:presentationLink</link:usedOn>
			<link:usedOn>link:definitionLink</link:usedOn>
			<link:usedOn>link:calculationLink</link:usedOn>
		</link:roleType>
		<link:roleType roleURI="http://www.williamblairfunds.com/4/role/N1aSupplement" id="wwwwilliamblairfundscom_4_N1aSupplement">
			<link:definition>410001 - Disclosure - S000066499 [Member] N-1A Supplement</link:definition>
			<link:usedOn>link:presentationLink</link:usedOn>
			<link:usedOn>link:definitionLink</link:usedOn>
			<link:usedOn>link:calculationLink</link:usedOn>
		</link:roleType>
		<link:roleType roleURI="http://www.williamblairfunds.com/5/role/RiskReturn" id="wwwwilliamblairfundscom_5_RiskReturn">
			<link:definition>510002 - Disclosure - S000008603 [Member] Investment Objectives and Goals</link:definition>
			<link:usedOn>link:presentationLink</link:usedOn>
			<link:usedOn>link:definitionLink</link:usedOn>
			<link:usedOn>link:calculationLink</link:usedOn>
		</link:roleType>
		<link:roleType roleURI="http://www.williamblairfunds.com/5/role/FeesAndExpenses" id="wwwwilliamblairfundscom_5_FeesAndExpenses">
			<link:definition>510003 - Disclosure - S000008603 [Member] Fees and Expenses</link:definition>
			<link:usedOn>link:presentationLink</link:usedOn>
			<link:usedOn>link:definitionLink</link:usedOn>
			<link:usedOn>link:calculationLink</link:usedOn>
		</link:roleType>
		<link:roleType roleURI="http://www.williamblairfunds.com/5/role/InvestmentStrategy" id="wwwwilliamblairfundscom_5_InvestmentStrategy">
			<link:definition>510004 - Disclosure - S000008603 [Member] Investment Strategy</link:definition>
			<link:usedOn>link:presentationLink</link:usedOn>
			<link:usedOn>link:definitionLink</link:usedOn>
			<link:usedOn>link:calculationLink</link:usedOn>
		</link:roleType>
		<link:roleType roleURI="http://www.williamblairfunds.com/5/role/InvestmentRisks" id="wwwwilliamblairfundscom_5_InvestmentRisks">
			<link:definition>510005 - Disclosure - S000008603 [Member] Investment Risks</link:definition>
			<link:usedOn>link:presentationLink</link:usedOn>
			<link:usedOn>link:definitionLink</link:usedOn>
			<link:usedOn>link:calculationLink</link:usedOn>
		</link:roleType>
		<link:roleType roleURI="http://www.williamblairfunds.com/5/role/PerformanceManagement" id="wwwwilliamblairfundscom_5_PerformanceManagement">
			<link:definition>510006 - Disclosure - S000008603 [Member] Performance Management</link:definition>
			<link:usedOn>link:presentationLink</link:usedOn>
			<link:usedOn>link:definitionLink</link:usedOn>
			<link:usedOn>link:calculationLink</link:usedOn>
		</link:roleType>
		<link:roleType roleURI="http://www.williamblairfunds.com/5/role/ShareholderFeesData" id="wwwwilliamblairfundscom_5_ShareholderFeesData">
			<link:definition>520010 - Disclosure - S000008603 [Member] Shareholder Fees</link:definition>
			<link:usedOn>link:presentationLink</link:usedOn>
			<link:usedOn>link:definitionLink</link:usedOn>
			<link:usedOn>link:calculationLink</link:usedOn>
		</link:roleType>
		<link:roleType roleURI="http://www.williamblairfunds.com/5/role/OperatingExpensesData" id="wwwwilliamblairfundscom_5_OperatingExpensesData">
			<link:definition>520020 - Disclosure - S000008603 [Member] Annual Fund Operating Expenses</link:definition>
			<link:usedOn>link:presentationLink</link:usedOn>
			<link:usedOn>link:definitionLink</link:usedOn>
			<link:usedOn>link:calculationLink</link:usedOn>
		</link:roleType>
		<link:roleType roleURI="http://www.williamblairfunds.com/5/role/ExpenseExample" id="wwwwilliamblairfundscom_5_ExpenseExample">
			<link:definition>520030 - Disclosure - S000008603 [Member] Expense Example</link:definition>
			<link:usedOn>link:presentationLink</link:usedOn>
			<link:usedOn>link:definitionLink</link:usedOn>
			<link:usedOn>link:calculationLink</link:usedOn>
		</link:roleType>
		<link:roleType roleURI="http://www.williamblairfunds.com/5/role/ExpenseExampleNoRedemption" id="wwwwilliamblairfundscom_5_ExpenseExampleNoRedemption">
			<link:definition>520040 - Disclosure - S000008603 [Member] Expense Example, No Redemption</link:definition>
			<link:usedOn>link:presentationLink</link:usedOn>
			<link:usedOn>link:definitionLink</link:usedOn>
			<link:usedOn>link:calculationLink</link:usedOn>
		</link:roleType>
		<link:roleType roleURI="http://www.williamblairfunds.com/5/role/RiskTableData" id="wwwwilliamblairfundscom_5_RiskTableData">
			<link:definition>520045 - Disclosure - S000008603 [Member] Risks Data</link:definition>
			<link:usedOn>link:presentationLink</link:usedOn>
			<link:usedOn>link:definitionLink</link:usedOn>
			<link:usedOn>link:calculationLink</link:usedOn>
		</link:roleType>
		<link:roleType roleURI="http://www.williamblairfunds.com/5/role/BarChartData" id="wwwwilliamblairfundscom_5_BarChartData">
			<link:definition>520050 - Disclosure - S000008603 [Member] Annual Total Returns</link:definition>
			<link:usedOn>link:presentationLink</link:usedOn>
			<link:usedOn>link:definitionLink</link:usedOn>
			<link:usedOn>link:calculationLink</link:usedOn>
		</link:roleType>
		<link:roleType roleURI="http://www.williamblairfunds.com/5/role/PerformanceTableData" id="wwwwilliamblairfundscom_5_PerformanceTableData">
			<link:definition>520060 - Disclosure - S000008603 [Member] Average Annual Total Returns</link:definition>
			<link:usedOn>link:presentationLink</link:usedOn>
			<link:usedOn>link:definitionLink</link:usedOn>
			<link:usedOn>link:calculationLink</link:usedOn>
		</link:roleType>
		<link:roleType roleURI="http://www.williamblairfunds.com/5/role/MarketIndexPerformanceData" id="wwwwilliamblairfundscom_5_MarketIndexPerformanceData">
			<link:definition>520070 - Disclosure - S000008603 [Member] Market Index Performance</link:definition>
			<link:usedOn>link:presentationLink</link:usedOn>
			<link:usedOn>link:definitionLink</link:usedOn>
			<link:usedOn>link:calculationLink</link:usedOn>
		</link:roleType>
		<link:roleType roleURI="http://www.williamblairfunds.com/5/role/N1aCover" id="wwwwilliamblairfundscom_5_N1aCover">
			<link:definition>510000 - Disclosure - S000008603 [Member] N-1A Cover</link:definition>
			<link:usedOn>link:presentationLink</link:usedOn>
			<link:usedOn>link:definitionLink</link:usedOn>
			<link:usedOn>link:calculationLink</link:usedOn>
		</link:roleType>
		<link:roleType roleURI="http://www.williamblairfunds.com/5/role/N1aSupplement" id="wwwwilliamblairfundscom_5_N1aSupplement">
			<link:definition>510001 - Disclosure - S000008603 [Member] N-1A Supplement</link:definition>
			<link:usedOn>link:presentationLink</link:usedOn>
			<link:usedOn>link:definitionLink</link:usedOn>
			<link:usedOn>link:calculationLink</link:usedOn>
		</link:roleType>
		<link:roleType roleURI="http://www.williamblairfunds.com/6/role/RiskReturn" id="wwwwilliamblairfundscom_6_RiskReturn">
			<link:definition>610002 - Disclosure - S000080810 [Member] Investment Objectives and Goals</link:definition>
			<link:usedOn>link:presentationLink</link:usedOn>
			<link:usedOn>link:definitionLink</link:usedOn>
			<link:usedOn>link:calculationLink</link:usedOn>
		</link:roleType>
		<link:roleType roleURI="http://www.williamblairfunds.com/6/role/FeesAndExpenses" id="wwwwilliamblairfundscom_6_FeesAndExpenses">
			<link:definition>610003 - Disclosure - S000080810 [Member] Fees and Expenses</link:definition>
			<link:usedOn>link:presentationLink</link:usedOn>
			<link:usedOn>link:definitionLink</link:usedOn>
			<link:usedOn>link:calculationLink</link:usedOn>
		</link:roleType>
		<link:roleType roleURI="http://www.williamblairfunds.com/6/role/InvestmentStrategy" id="wwwwilliamblairfundscom_6_InvestmentStrategy">
			<link:definition>610004 - Disclosure - S000080810 [Member] Investment Strategy</link:definition>
			<link:usedOn>link:presentationLink</link:usedOn>
			<link:usedOn>link:definitionLink</link:usedOn>
			<link:usedOn>link:calculationLink</link:usedOn>
		</link:roleType>
		<link:roleType roleURI="http://www.williamblairfunds.com/6/role/InvestmentRisks" id="wwwwilliamblairfundscom_6_InvestmentRisks">
			<link:definition>610005 - Disclosure - S000080810 [Member] Investment Risks</link:definition>
			<link:usedOn>link:presentationLink</link:usedOn>
			<link:usedOn>link:definitionLink</link:usedOn>
			<link:usedOn>link:calculationLink</link:usedOn>
		</link:roleType>
		<link:roleType roleURI="http://www.williamblairfunds.com/6/role/PerformanceManagement" id="wwwwilliamblairfundscom_6_PerformanceManagement">
			<link:definition>610006 - Disclosure - S000080810 [Member] Performance Management</link:definition>
			<link:usedOn>link:presentationLink</link:usedOn>
			<link:usedOn>link:definitionLink</link:usedOn>
			<link:usedOn>link:calculationLink</link:usedOn>
		</link:roleType>
		<link:roleType roleURI="http://www.williamblairfunds.com/6/role/ShareholderFeesData" id="wwwwilliamblairfundscom_6_ShareholderFeesData">
			<link:definition>620010 - Disclosure - S000080810 [Member] Shareholder Fees</link:definition>
			<link:usedOn>link:presentationLink</link:usedOn>
			<link:usedOn>link:definitionLink</link:usedOn>
			<link:usedOn>link:calculationLink</link:usedOn>
		</link:roleType>
		<link:roleType roleURI="http://www.williamblairfunds.com/6/role/OperatingExpensesData" id="wwwwilliamblairfundscom_6_OperatingExpensesData">
			<link:definition>620020 - Disclosure - S000080810 [Member] Annual Fund Operating Expenses</link:definition>
			<link:usedOn>link:presentationLink</link:usedOn>
			<link:usedOn>link:definitionLink</link:usedOn>
			<link:usedOn>link:calculationLink</link:usedOn>
		</link:roleType>
		<link:roleType roleURI="http://www.williamblairfunds.com/6/role/ExpenseExample" id="wwwwilliamblairfundscom_6_ExpenseExample">
			<link:definition>620030 - Disclosure - S000080810 [Member] Expense Example</link:definition>
			<link:usedOn>link:presentationLink</link:usedOn>
			<link:usedOn>link:definitionLink</link:usedOn>
			<link:usedOn>link:calculationLink</link:usedOn>
		</link:roleType>
		<link:roleType roleURI="http://www.williamblairfunds.com/6/role/ExpenseExampleNoRedemption" id="wwwwilliamblairfundscom_6_ExpenseExampleNoRedemption">
			<link:definition>620040 - Disclosure - S000080810 [Member] Expense Example, No Redemption</link:definition>
			<link:usedOn>link:presentationLink</link:usedOn>
			<link:usedOn>link:definitionLink</link:usedOn>
			<link:usedOn>link:calculationLink</link:usedOn>
		</link:roleType>
		<link:roleType roleURI="http://www.williamblairfunds.com/6/role/RiskTableData" id="wwwwilliamblairfundscom_6_RiskTableData">
			<link:definition>620045 - Disclosure - S000080810 [Member] Risks Data</link:definition>
			<link:usedOn>link:presentationLink</link:usedOn>
			<link:usedOn>link:definitionLink</link:usedOn>
			<link:usedOn>link:calculationLink</link:usedOn>
		</link:roleType>
		<link:roleType roleURI="http://www.williamblairfunds.com/6/role/BarChartData" id="wwwwilliamblairfundscom_6_BarChartData">
			<link:definition>620050 - Disclosure - S000080810 [Member] Annual Total Returns</link:definition>
			<link:usedOn>link:presentationLink</link:usedOn>
			<link:usedOn>link:definitionLink</link:usedOn>
			<link:usedOn>link:calculationLink</link:usedOn>
		</link:roleType>
		<link:roleType roleURI="http://www.williamblairfunds.com/6/role/PerformanceTableData" id="wwwwilliamblairfundscom_6_PerformanceTableData">
			<link:definition>620060 - Disclosure - S000080810 [Member] Average Annual Total Returns</link:definition>
			<link:usedOn>link:presentationLink</link:usedOn>
			<link:usedOn>link:definitionLink</link:usedOn>
			<link:usedOn>link:calculationLink</link:usedOn>
		</link:roleType>
		<link:roleType roleURI="http://www.williamblairfunds.com/6/role/MarketIndexPerformanceData" id="wwwwilliamblairfundscom_6_MarketIndexPerformanceData">
			<link:definition>620070 - Disclosure - S000080810 [Member] Market Index Performance</link:definition>
			<link:usedOn>link:presentationLink</link:usedOn>
			<link:usedOn>link:definitionLink</link:usedOn>
			<link:usedOn>link:calculationLink</link:usedOn>
		</link:roleType>
		<link:roleType roleURI="http://www.williamblairfunds.com/6/role/N1aCover" id="wwwwilliamblairfundscom_6_N1aCover">
			<link:definition>610000 - Disclosure - S000080810 [Member] N-1A Cover</link:definition>
			<link:usedOn>link:presentationLink</link:usedOn>
			<link:usedOn>link:definitionLink</link:usedOn>
			<link:usedOn>link:calculationLink</link:usedOn>
		</link:roleType>
		<link:roleType roleURI="http://www.williamblairfunds.com/6/role/N1aSupplement" id="wwwwilliamblairfundscom_6_N1aSupplement">
			<link:definition>610001 - Disclosure - S000080810 [Member] N-1A Supplement</link:definition>
			<link:usedOn>link:presentationLink</link:usedOn>
			<link:usedOn>link:definitionLink</link:usedOn>
			<link:usedOn>link:calculationLink</link:usedOn>
		</link:roleType>
		<link:roleType roleURI="http://www.williamblairfunds.com/7/role/RiskReturn" id="wwwwilliamblairfundscom_7_RiskReturn">
			<link:definition>710002 - Disclosure - S000008602 [Member] Investment Objectives and Goals</link:definition>
			<link:usedOn>link:presentationLink</link:usedOn>
			<link:usedOn>link:definitionLink</link:usedOn>
			<link:usedOn>link:calculationLink</link:usedOn>
		</link:roleType>
		<link:roleType roleURI="http://www.williamblairfunds.com/7/role/FeesAndExpenses" id="wwwwilliamblairfundscom_7_FeesAndExpenses">
			<link:definition>710003 - Disclosure - S000008602 [Member] Fees and Expenses</link:definition>
			<link:usedOn>link:presentationLink</link:usedOn>
			<link:usedOn>link:definitionLink</link:usedOn>
			<link:usedOn>link:calculationLink</link:usedOn>
		</link:roleType>
		<link:roleType roleURI="http://www.williamblairfunds.com/7/role/InvestmentStrategy" id="wwwwilliamblairfundscom_7_InvestmentStrategy">
			<link:definition>710004 - Disclosure - S000008602 [Member] Investment Strategy</link:definition>
			<link:usedOn>link:presentationLink</link:usedOn>
			<link:usedOn>link:definitionLink</link:usedOn>
			<link:usedOn>link:calculationLink</link:usedOn>
		</link:roleType>
		<link:roleType roleURI="http://www.williamblairfunds.com/7/role/InvestmentRisks" id="wwwwilliamblairfundscom_7_InvestmentRisks">
			<link:definition>710005 - Disclosure - S000008602 [Member] Investment Risks</link:definition>
			<link:usedOn>link:presentationLink</link:usedOn>
			<link:usedOn>link:definitionLink</link:usedOn>
			<link:usedOn>link:calculationLink</link:usedOn>
		</link:roleType>
		<link:roleType roleURI="http://www.williamblairfunds.com/7/role/PerformanceManagement" id="wwwwilliamblairfundscom_7_PerformanceManagement">
			<link:definition>710006 - Disclosure - S000008602 [Member] Performance Management</link:definition>
			<link:usedOn>link:presentationLink</link:usedOn>
			<link:usedOn>link:definitionLink</link:usedOn>
			<link:usedOn>link:calculationLink</link:usedOn>
		</link:roleType>
		<link:roleType roleURI="http://www.williamblairfunds.com/7/role/ShareholderFeesData" id="wwwwilliamblairfundscom_7_ShareholderFeesData">
			<link:definition>720010 - Disclosure - S000008602 [Member] Shareholder Fees</link:definition>
			<link:usedOn>link:presentationLink</link:usedOn>
			<link:usedOn>link:definitionLink</link:usedOn>
			<link:usedOn>link:calculationLink</link:usedOn>
		</link:roleType>
		<link:roleType roleURI="http://www.williamblairfunds.com/7/role/OperatingExpensesData" id="wwwwilliamblairfundscom_7_OperatingExpensesData">
			<link:definition>720020 - Disclosure - S000008602 [Member] Annual Fund Operating Expenses</link:definition>
			<link:usedOn>link:presentationLink</link:usedOn>
			<link:usedOn>link:definitionLink</link:usedOn>
			<link:usedOn>link:calculationLink</link:usedOn>
		</link:roleType>
		<link:roleType roleURI="http://www.williamblairfunds.com/7/role/ExpenseExample" id="wwwwilliamblairfundscom_7_ExpenseExample">
			<link:definition>720030 - Disclosure - S000008602 [Member] Expense Example</link:definition>
			<link:usedOn>link:presentationLink</link:usedOn>
			<link:usedOn>link:definitionLink</link:usedOn>
			<link:usedOn>link:calculationLink</link:usedOn>
		</link:roleType>
		<link:roleType roleURI="http://www.williamblairfunds.com/7/role/ExpenseExampleNoRedemption" id="wwwwilliamblairfundscom_7_ExpenseExampleNoRedemption">
			<link:definition>720040 - Disclosure - S000008602 [Member] Expense Example, No Redemption</link:definition>
			<link:usedOn>link:presentationLink</link:usedOn>
			<link:usedOn>link:definitionLink</link:usedOn>
			<link:usedOn>link:calculationLink</link:usedOn>
		</link:roleType>
		<link:roleType roleURI="http://www.williamblairfunds.com/7/role/RiskTableData" id="wwwwilliamblairfundscom_7_RiskTableData">
			<link:definition>720045 - Disclosure - S000008602 [Member] Risks Data</link:definition>
			<link:usedOn>link:presentationLink</link:usedOn>
			<link:usedOn>link:definitionLink</link:usedOn>
			<link:usedOn>link:calculationLink</link:usedOn>
		</link:roleType>
		<link:roleType roleURI="http://www.williamblairfunds.com/7/role/BarChartData" id="wwwwilliamblairfundscom_7_BarChartData">
			<link:definition>720050 - Disclosure - S000008602 [Member] Annual Total Returns</link:definition>
			<link:usedOn>link:presentationLink</link:usedOn>
			<link:usedOn>link:definitionLink</link:usedOn>
			<link:usedOn>link:calculationLink</link:usedOn>
		</link:roleType>
		<link:roleType roleURI="http://www.williamblairfunds.com/7/role/PerformanceTableData" id="wwwwilliamblairfundscom_7_PerformanceTableData">
			<link:definition>720060 - Disclosure - S000008602 [Member] Average Annual Total Returns</link:definition>
			<link:usedOn>link:presentationLink</link:usedOn>
			<link:usedOn>link:definitionLink</link:usedOn>
			<link:usedOn>link:calculationLink</link:usedOn>
		</link:roleType>
		<link:roleType roleURI="http://www.williamblairfunds.com/7/role/MarketIndexPerformanceData" id="wwwwilliamblairfundscom_7_MarketIndexPerformanceData">
			<link:definition>720070 - Disclosure - S000008602 [Member] Market Index Performance</link:definition>
			<link:usedOn>link:presentationLink</link:usedOn>
			<link:usedOn>link:definitionLink</link:usedOn>
			<link:usedOn>link:calculationLink</link:usedOn>
		</link:roleType>
		<link:roleType roleURI="http://www.williamblairfunds.com/7/role/N1aCover" id="wwwwilliamblairfundscom_7_N1aCover">
			<link:definition>710000 - Disclosure - S000008602 [Member] N-1A Cover</link:definition>
			<link:usedOn>link:presentationLink</link:usedOn>
			<link:usedOn>link:definitionLink</link:usedOn>
			<link:usedOn>link:calculationLink</link:usedOn>
		</link:roleType>
		<link:roleType roleURI="http://www.williamblairfunds.com/7/role/N1aSupplement" id="wwwwilliamblairfundscom_7_N1aSupplement">
			<link:definition>710001 - Disclosure - S000008602 [Member] N-1A Supplement</link:definition>
			<link:usedOn>link:presentationLink</link:usedOn>
			<link:usedOn>link:definitionLink</link:usedOn>
			<link:usedOn>link:calculationLink</link:usedOn>
		</link:roleType>
		<link:roleType roleURI="http://www.williamblairfunds.com/8/role/RiskReturn" id="wwwwilliamblairfundscom_8_RiskReturn">
			<link:definition>810002 - Disclosure - S000008597 [Member] Investment Objectives and Goals</link:definition>
			<link:usedOn>link:presentationLink</link:usedOn>
			<link:usedOn>link:definitionLink</link:usedOn>
			<link:usedOn>link:calculationLink</link:usedOn>
		</link:roleType>
		<link:roleType roleURI="http://www.williamblairfunds.com/8/role/FeesAndExpenses" id="wwwwilliamblairfundscom_8_FeesAndExpenses">
			<link:definition>810003 - Disclosure - S000008597 [Member] Fees and Expenses</link:definition>
			<link:usedOn>link:presentationLink</link:usedOn>
			<link:usedOn>link:definitionLink</link:usedOn>
			<link:usedOn>link:calculationLink</link:usedOn>
		</link:roleType>
		<link:roleType roleURI="http://www.williamblairfunds.com/8/role/InvestmentStrategy" id="wwwwilliamblairfundscom_8_InvestmentStrategy">
			<link:definition>810004 - Disclosure - S000008597 [Member] Investment Strategy</link:definition>
			<link:usedOn>link:presentationLink</link:usedOn>
			<link:usedOn>link:definitionLink</link:usedOn>
			<link:usedOn>link:calculationLink</link:usedOn>
		</link:roleType>
		<link:roleType roleURI="http://www.williamblairfunds.com/8/role/InvestmentRisks" id="wwwwilliamblairfundscom_8_InvestmentRisks">
			<link:definition>810005 - Disclosure - S000008597 [Member] Investment Risks</link:definition>
			<link:usedOn>link:presentationLink</link:usedOn>
			<link:usedOn>link:definitionLink</link:usedOn>
			<link:usedOn>link:calculationLink</link:usedOn>
		</link:roleType>
		<link:roleType roleURI="http://www.williamblairfunds.com/8/role/PerformanceManagement" id="wwwwilliamblairfundscom_8_PerformanceManagement">
			<link:definition>810006 - Disclosure - S000008597 [Member] Performance Management</link:definition>
			<link:usedOn>link:presentationLink</link:usedOn>
			<link:usedOn>link:definitionLink</link:usedOn>
			<link:usedOn>link:calculationLink</link:usedOn>
		</link:roleType>
		<link:roleType roleURI="http://www.williamblairfunds.com/8/role/ShareholderFeesData" id="wwwwilliamblairfundscom_8_ShareholderFeesData">
			<link:definition>820010 - Disclosure - S000008597 [Member] Shareholder Fees</link:definition>
			<link:usedOn>link:presentationLink</link:usedOn>
			<link:usedOn>link:definitionLink</link:usedOn>
			<link:usedOn>link:calculationLink</link:usedOn>
		</link:roleType>
		<link:roleType roleURI="http://www.williamblairfunds.com/8/role/OperatingExpensesData" id="wwwwilliamblairfundscom_8_OperatingExpensesData">
			<link:definition>820020 - Disclosure - S000008597 [Member] Annual Fund Operating Expenses</link:definition>
			<link:usedOn>link:presentationLink</link:usedOn>
			<link:usedOn>link:definitionLink</link:usedOn>
			<link:usedOn>link:calculationLink</link:usedOn>
		</link:roleType>
		<link:roleType roleURI="http://www.williamblairfunds.com/8/role/ExpenseExample" id="wwwwilliamblairfundscom_8_ExpenseExample">
			<link:definition>820030 - Disclosure - S000008597 [Member] Expense Example</link:definition>
			<link:usedOn>link:presentationLink</link:usedOn>
			<link:usedOn>link:definitionLink</link:usedOn>
			<link:usedOn>link:calculationLink</link:usedOn>
		</link:roleType>
		<link:roleType roleURI="http://www.williamblairfunds.com/8/role/ExpenseExampleNoRedemption" id="wwwwilliamblairfundscom_8_ExpenseExampleNoRedemption">
			<link:definition>820040 - Disclosure - S000008597 [Member] Expense Example, No Redemption</link:definition>
			<link:usedOn>link:presentationLink</link:usedOn>
			<link:usedOn>link:definitionLink</link:usedOn>
			<link:usedOn>link:calculationLink</link:usedOn>
		</link:roleType>
		<link:roleType roleURI="http://www.williamblairfunds.com/8/role/RiskTableData" id="wwwwilliamblairfundscom_8_RiskTableData">
			<link:definition>820045 - Disclosure - S000008597 [Member] Risks Data</link:definition>
			<link:usedOn>link:presentationLink</link:usedOn>
			<link:usedOn>link:definitionLink</link:usedOn>
			<link:usedOn>link:calculationLink</link:usedOn>
		</link:roleType>
		<link:roleType roleURI="http://www.williamblairfunds.com/8/role/BarChartData" id="wwwwilliamblairfundscom_8_BarChartData">
			<link:definition>820050 - Disclosure - S000008597 [Member] Annual Total Returns</link:definition>
			<link:usedOn>link:presentationLink</link:usedOn>
			<link:usedOn>link:definitionLink</link:usedOn>
			<link:usedOn>link:calculationLink</link:usedOn>
		</link:roleType>
		<link:roleType roleURI="http://www.williamblairfunds.com/8/role/PerformanceTableData" id="wwwwilliamblairfundscom_8_PerformanceTableData">
			<link:definition>820060 - Disclosure - S000008597 [Member] Average Annual Total Returns</link:definition>
			<link:usedOn>link:presentationLink</link:usedOn>
			<link:usedOn>link:definitionLink</link:usedOn>
			<link:usedOn>link:calculationLink</link:usedOn>
		</link:roleType>
		<link:roleType roleURI="http://www.williamblairfunds.com/8/role/MarketIndexPerformanceData" id="wwwwilliamblairfundscom_8_MarketIndexPerformanceData">
			<link:definition>820070 - Disclosure - S000008597 [Member] Market Index Performance</link:definition>
			<link:usedOn>link:presentationLink</link:usedOn>
			<link:usedOn>link:definitionLink</link:usedOn>
			<link:usedOn>link:calculationLink</link:usedOn>
		</link:roleType>
		<link:roleType roleURI="http://www.williamblairfunds.com/8/role/N1aCover" id="wwwwilliamblairfundscom_8_N1aCover">
			<link:definition>810000 - Disclosure - S000008597 [Member] N-1A Cover</link:definition>
			<link:usedOn>link:presentationLink</link:usedOn>
			<link:usedOn>link:definitionLink</link:usedOn>
			<link:usedOn>link:calculationLink</link:usedOn>
		</link:roleType>
		<link:roleType roleURI="http://www.williamblairfunds.com/8/role/N1aSupplement" id="wwwwilliamblairfundscom_8_N1aSupplement">
			<link:definition>810001 - Disclosure - S000008597 [Member] N-1A Supplement</link:definition>
			<link:usedOn>link:presentationLink</link:usedOn>
			<link:usedOn>link:definitionLink</link:usedOn>
			<link:usedOn>link:calculationLink</link:usedOn>
		</link:roleType>
		<link:roleType roleURI="http://www.williamblairfunds.com/9/role/RiskReturn" id="wwwwilliamblairfundscom_9_RiskReturn">
			<link:definition>910002 - Disclosure - S000019315 [Member] Investment Objectives and Goals</link:definition>
			<link:usedOn>link:presentationLink</link:usedOn>
			<link:usedOn>link:definitionLink</link:usedOn>
			<link:usedOn>link:calculationLink</link:usedOn>
		</link:roleType>
		<link:roleType roleURI="http://www.williamblairfunds.com/9/role/FeesAndExpenses" id="wwwwilliamblairfundscom_9_FeesAndExpenses">
			<link:definition>910003 - Disclosure - S000019315 [Member] Fees and Expenses</link:definition>
			<link:usedOn>link:presentationLink</link:usedOn>
			<link:usedOn>link:definitionLink</link:usedOn>
			<link:usedOn>link:calculationLink</link:usedOn>
		</link:roleType>
		<link:roleType roleURI="http://www.williamblairfunds.com/9/role/InvestmentStrategy" id="wwwwilliamblairfundscom_9_InvestmentStrategy">
			<link:definition>910004 - Disclosure - S000019315 [Member] Investment Strategy</link:definition>
			<link:usedOn>link:presentationLink</link:usedOn>
			<link:usedOn>link:definitionLink</link:usedOn>
			<link:usedOn>link:calculationLink</link:usedOn>
		</link:roleType>
		<link:roleType roleURI="http://www.williamblairfunds.com/9/role/InvestmentRisks" id="wwwwilliamblairfundscom_9_InvestmentRisks">
			<link:definition>910005 - Disclosure - S000019315 [Member] Investment Risks</link:definition>
			<link:usedOn>link:presentationLink</link:usedOn>
			<link:usedOn>link:definitionLink</link:usedOn>
			<link:usedOn>link:calculationLink</link:usedOn>
		</link:roleType>
		<link:roleType roleURI="http://www.williamblairfunds.com/9/role/PerformanceManagement" id="wwwwilliamblairfundscom_9_PerformanceManagement">
			<link:definition>910006 - Disclosure - S000019315 [Member] Performance Management</link:definition>
			<link:usedOn>link:presentationLink</link:usedOn>
			<link:usedOn>link:definitionLink</link:usedOn>
			<link:usedOn>link:calculationLink</link:usedOn>
		</link:roleType>
		<link:roleType roleURI="http://www.williamblairfunds.com/9/role/ShareholderFeesData" id="wwwwilliamblairfundscom_9_ShareholderFeesData">
			<link:definition>920010 - Disclosure - S000019315 [Member] Shareholder Fees</link:definition>
			<link:usedOn>link:presentationLink</link:usedOn>
			<link:usedOn>link:definitionLink</link:usedOn>
			<link:usedOn>link:calculationLink</link:usedOn>
		</link:roleType>
		<link:roleType roleURI="http://www.williamblairfunds.com/9/role/OperatingExpensesData" id="wwwwilliamblairfundscom_9_OperatingExpensesData">
			<link:definition>920020 - Disclosure - S000019315 [Member] Annual Fund Operating Expenses</link:definition>
			<link:usedOn>link:presentationLink</link:usedOn>
			<link:usedOn>link:definitionLink</link:usedOn>
			<link:usedOn>link:calculationLink</link:usedOn>
		</link:roleType>
		<link:roleType roleURI="http://www.williamblairfunds.com/9/role/ExpenseExample" id="wwwwilliamblairfundscom_9_ExpenseExample">
			<link:definition>920030 - Disclosure - S000019315 [Member] Expense Example</link:definition>
			<link:usedOn>link:presentationLink</link:usedOn>
			<link:usedOn>link:definitionLink</link:usedOn>
			<link:usedOn>link:calculationLink</link:usedOn>
		</link:roleType>
		<link:roleType roleURI="http://www.williamblairfunds.com/9/role/ExpenseExampleNoRedemption" id="wwwwilliamblairfundscom_9_ExpenseExampleNoRedemption">
			<link:definition>920040 - Disclosure - S000019315 [Member] Expense Example, No Redemption</link:definition>
			<link:usedOn>link:presentationLink</link:usedOn>
			<link:usedOn>link:definitionLink</link:usedOn>
			<link:usedOn>link:calculationLink</link:usedOn>
		</link:roleType>
		<link:roleType roleURI="http://www.williamblairfunds.com/9/role/RiskTableData" id="wwwwilliamblairfundscom_9_RiskTableData">
			<link:definition>920045 - Disclosure - S000019315 [Member] Risks Data</link:definition>
			<link:usedOn>link:presentationLink</link:usedOn>
			<link:usedOn>link:definitionLink</link:usedOn>
			<link:usedOn>link:calculationLink</link:usedOn>
		</link:roleType>
		<link:roleType roleURI="http://www.williamblairfunds.com/9/role/BarChartData" id="wwwwilliamblairfundscom_9_BarChartData">
			<link:definition>920050 - Disclosure - S000019315 [Member] Annual Total Returns</link:definition>
			<link:usedOn>link:presentationLink</link:usedOn>
			<link:usedOn>link:definitionLink</link:usedOn>
			<link:usedOn>link:calculationLink</link:usedOn>
		</link:roleType>
		<link:roleType roleURI="http://www.williamblairfunds.com/9/role/PerformanceTableData" id="wwwwilliamblairfundscom_9_PerformanceTableData">
			<link:definition>920060 - Disclosure - S000019315 [Member] Average Annual Total Returns</link:definition>
			<link:usedOn>link:presentationLink</link:usedOn>
			<link:usedOn>link:definitionLink</link:usedOn>
			<link:usedOn>link:calculationLink</link:usedOn>
		</link:roleType>
		<link:roleType roleURI="http://www.williamblairfunds.com/9/role/MarketIndexPerformanceData" id="wwwwilliamblairfundscom_9_MarketIndexPerformanceData">
			<link:definition>920070 - Disclosure - S000019315 [Member] Market Index Performance</link:definition>
			<link:usedOn>link:presentationLink</link:usedOn>
			<link:usedOn>link:definitionLink</link:usedOn>
			<link:usedOn>link:calculationLink</link:usedOn>
		</link:roleType>
		<link:roleType roleURI="http://www.williamblairfunds.com/9/role/N1aCover" id="wwwwilliamblairfundscom_9_N1aCover">
			<link:definition>910000 - Disclosure - S000019315 [Member] N-1A Cover</link:definition>
			<link:usedOn>link:presentationLink</link:usedOn>
			<link:usedOn>link:definitionLink</link:usedOn>
			<link:usedOn>link:calculationLink</link:usedOn>
		</link:roleType>
		<link:roleType roleURI="http://www.williamblairfunds.com/9/role/N1aSupplement" id="wwwwilliamblairfundscom_9_N1aSupplement">
			<link:definition>910001 - Disclosure - S000019315 [Member] N-1A Supplement</link:definition>
			<link:usedOn>link:presentationLink</link:usedOn>
			<link:usedOn>link:definitionLink</link:usedOn>
			<link:usedOn>link:calculationLink</link:usedOn>
		</link:roleType>
		<link:roleType roleURI="http://www.williamblairfunds.com/10/role/RiskReturn" id="wwwwilliamblairfundscom_10_RiskReturn">
			<link:definition>1010002 - Disclosure - S000037763 [Member] Investment Objectives and Goals</link:definition>
			<link:usedOn>link:presentationLink</link:usedOn>
			<link:usedOn>link:definitionLink</link:usedOn>
			<link:usedOn>link:calculationLink</link:usedOn>
		</link:roleType>
		<link:roleType roleURI="http://www.williamblairfunds.com/10/role/FeesAndExpenses" id="wwwwilliamblairfundscom_10_FeesAndExpenses">
			<link:definition>1010003 - Disclosure - S000037763 [Member] Fees and Expenses</link:definition>
			<link:usedOn>link:presentationLink</link:usedOn>
			<link:usedOn>link:definitionLink</link:usedOn>
			<link:usedOn>link:calculationLink</link:usedOn>
		</link:roleType>
		<link:roleType roleURI="http://www.williamblairfunds.com/10/role/InvestmentStrategy" id="wwwwilliamblairfundscom_10_InvestmentStrategy">
			<link:definition>1010004 - Disclosure - S000037763 [Member] Investment Strategy</link:definition>
			<link:usedOn>link:presentationLink</link:usedOn>
			<link:usedOn>link:definitionLink</link:usedOn>
			<link:usedOn>link:calculationLink</link:usedOn>
		</link:roleType>
		<link:roleType roleURI="http://www.williamblairfunds.com/10/role/InvestmentRisks" id="wwwwilliamblairfundscom_10_InvestmentRisks">
			<link:definition>1010005 - Disclosure - S000037763 [Member] Investment Risks</link:definition>
			<link:usedOn>link:presentationLink</link:usedOn>
			<link:usedOn>link:definitionLink</link:usedOn>
			<link:usedOn>link:calculationLink</link:usedOn>
		</link:roleType>
		<link:roleType roleURI="http://www.williamblairfunds.com/10/role/PerformanceManagement" id="wwwwilliamblairfundscom_10_PerformanceManagement">
			<link:definition>1010006 - Disclosure - S000037763 [Member] Performance Management</link:definition>
			<link:usedOn>link:presentationLink</link:usedOn>
			<link:usedOn>link:definitionLink</link:usedOn>
			<link:usedOn>link:calculationLink</link:usedOn>
		</link:roleType>
		<link:roleType roleURI="http://www.williamblairfunds.com/10/role/ShareholderFeesData" id="wwwwilliamblairfundscom_10_ShareholderFeesData">
			<link:definition>1020010 - Disclosure - S000037763 [Member] Shareholder Fees</link:definition>
			<link:usedOn>link:presentationLink</link:usedOn>
			<link:usedOn>link:definitionLink</link:usedOn>
			<link:usedOn>link:calculationLink</link:usedOn>
		</link:roleType>
		<link:roleType roleURI="http://www.williamblairfunds.com/10/role/OperatingExpensesData" id="wwwwilliamblairfundscom_10_OperatingExpensesData">
			<link:definition>1020020 - Disclosure - S000037763 [Member] Annual Fund Operating Expenses</link:definition>
			<link:usedOn>link:presentationLink</link:usedOn>
			<link:usedOn>link:definitionLink</link:usedOn>
			<link:usedOn>link:calculationLink</link:usedOn>
		</link:roleType>
		<link:roleType roleURI="http://www.williamblairfunds.com/10/role/ExpenseExample" id="wwwwilliamblairfundscom_10_ExpenseExample">
			<link:definition>1020030 - Disclosure - S000037763 [Member] Expense Example</link:definition>
			<link:usedOn>link:presentationLink</link:usedOn>
			<link:usedOn>link:definitionLink</link:usedOn>
			<link:usedOn>link:calculationLink</link:usedOn>
		</link:roleType>
		<link:roleType roleURI="http://www.williamblairfunds.com/10/role/ExpenseExampleNoRedemption" id="wwwwilliamblairfundscom_10_ExpenseExampleNoRedemption">
			<link:definition>1020040 - Disclosure - S000037763 [Member] Expense Example, No Redemption</link:definition>
			<link:usedOn>link:presentationLink</link:usedOn>
			<link:usedOn>link:definitionLink</link:usedOn>
			<link:usedOn>link:calculationLink</link:usedOn>
		</link:roleType>
		<link:roleType roleURI="http://www.williamblairfunds.com/10/role/RiskTableData" id="wwwwilliamblairfundscom_10_RiskTableData">
			<link:definition>1020045 - Disclosure - S000037763 [Member] Risks Data</link:definition>
			<link:usedOn>link:presentationLink</link:usedOn>
			<link:usedOn>link:definitionLink</link:usedOn>
			<link:usedOn>link:calculationLink</link:usedOn>
		</link:roleType>
		<link:roleType roleURI="http://www.williamblairfunds.com/10/role/BarChartData" id="wwwwilliamblairfundscom_10_BarChartData">
			<link:definition>1020050 - Disclosure - S000037763 [Member] Annual Total Returns</link:definition>
			<link:usedOn>link:presentationLink</link:usedOn>
			<link:usedOn>link:definitionLink</link:usedOn>
			<link:usedOn>link:calculationLink</link:usedOn>
		</link:roleType>
		<link:roleType roleURI="http://www.williamblairfunds.com/10/role/PerformanceTableData" id="wwwwilliamblairfundscom_10_PerformanceTableData">
			<link:definition>1020060 - Disclosure - S000037763 [Member] Average Annual Total Returns</link:definition>
			<link:usedOn>link:presentationLink</link:usedOn>
			<link:usedOn>link:definitionLink</link:usedOn>
			<link:usedOn>link:calculationLink</link:usedOn>
		</link:roleType>
		<link:roleType roleURI="http://www.williamblairfunds.com/10/role/MarketIndexPerformanceData" id="wwwwilliamblairfundscom_10_MarketIndexPerformanceData">
			<link:definition>1020070 - Disclosure - S000037763 [Member] Market Index Performance</link:definition>
			<link:usedOn>link:presentationLink</link:usedOn>
			<link:usedOn>link:definitionLink</link:usedOn>
			<link:usedOn>link:calculationLink</link:usedOn>
		</link:roleType>
		<link:roleType roleURI="http://www.williamblairfunds.com/10/role/N1aCover" id="wwwwilliamblairfundscom_10_N1aCover">
			<link:definition>1010000 - Disclosure - S000037763 [Member] N-1A Cover</link:definition>
			<link:usedOn>link:presentationLink</link:usedOn>
			<link:usedOn>link:definitionLink</link:usedOn>
			<link:usedOn>link:calculationLink</link:usedOn>
		</link:roleType>
		<link:roleType roleURI="http://www.williamblairfunds.com/10/role/N1aSupplement" id="wwwwilliamblairfundscom_10_N1aSupplement">
			<link:definition>1010001 - Disclosure - S000037763 [Member] N-1A Supplement</link:definition>
			<link:usedOn>link:presentationLink</link:usedOn>
			<link:usedOn>link:definitionLink</link:usedOn>
			<link:usedOn>link:calculationLink</link:usedOn>
		</link:roleType>
		<link:roleType roleURI="http://www.williamblairfunds.com/11/role/RiskReturn" id="wwwwilliamblairfundscom_11_RiskReturn">
			<link:definition>1110002 - Disclosure - S000008604 [Member] Investment Objectives and Goals</link:definition>
			<link:usedOn>link:presentationLink</link:usedOn>
			<link:usedOn>link:definitionLink</link:usedOn>
			<link:usedOn>link:calculationLink</link:usedOn>
		</link:roleType>
		<link:roleType roleURI="http://www.williamblairfunds.com/11/role/FeesAndExpenses" id="wwwwilliamblairfundscom_11_FeesAndExpenses">
			<link:definition>1110003 - Disclosure - S000008604 [Member] Fees and Expenses</link:definition>
			<link:usedOn>link:presentationLink</link:usedOn>
			<link:usedOn>link:definitionLink</link:usedOn>
			<link:usedOn>link:calculationLink</link:usedOn>
		</link:roleType>
		<link:roleType roleURI="http://www.williamblairfunds.com/11/role/InvestmentStrategy" id="wwwwilliamblairfundscom_11_InvestmentStrategy">
			<link:definition>1110004 - Disclosure - S000008604 [Member] Investment Strategy</link:definition>
			<link:usedOn>link:presentationLink</link:usedOn>
			<link:usedOn>link:definitionLink</link:usedOn>
			<link:usedOn>link:calculationLink</link:usedOn>
		</link:roleType>
		<link:roleType roleURI="http://www.williamblairfunds.com/11/role/InvestmentRisks" id="wwwwilliamblairfundscom_11_InvestmentRisks">
			<link:definition>1110005 - Disclosure - S000008604 [Member] Investment Risks</link:definition>
			<link:usedOn>link:presentationLink</link:usedOn>
			<link:usedOn>link:definitionLink</link:usedOn>
			<link:usedOn>link:calculationLink</link:usedOn>
		</link:roleType>
		<link:roleType roleURI="http://www.williamblairfunds.com/11/role/PerformanceManagement" id="wwwwilliamblairfundscom_11_PerformanceManagement">
			<link:definition>1110006 - Disclosure - S000008604 [Member] Performance Management</link:definition>
			<link:usedOn>link:presentationLink</link:usedOn>
			<link:usedOn>link:definitionLink</link:usedOn>
			<link:usedOn>link:calculationLink</link:usedOn>
		</link:roleType>
		<link:roleType roleURI="http://www.williamblairfunds.com/11/role/ShareholderFeesData" id="wwwwilliamblairfundscom_11_ShareholderFeesData">
			<link:definition>1120010 - Disclosure - S000008604 [Member] Shareholder Fees</link:definition>
			<link:usedOn>link:presentationLink</link:usedOn>
			<link:usedOn>link:definitionLink</link:usedOn>
			<link:usedOn>link:calculationLink</link:usedOn>
		</link:roleType>
		<link:roleType roleURI="http://www.williamblairfunds.com/11/role/OperatingExpensesData" id="wwwwilliamblairfundscom_11_OperatingExpensesData">
			<link:definition>1120020 - Disclosure - S000008604 [Member] Annual Fund Operating Expenses</link:definition>
			<link:usedOn>link:presentationLink</link:usedOn>
			<link:usedOn>link:definitionLink</link:usedOn>
			<link:usedOn>link:calculationLink</link:usedOn>
		</link:roleType>
		<link:roleType roleURI="http://www.williamblairfunds.com/11/role/ExpenseExample" id="wwwwilliamblairfundscom_11_ExpenseExample">
			<link:definition>1120030 - Disclosure - S000008604 [Member] Expense Example</link:definition>
			<link:usedOn>link:presentationLink</link:usedOn>
			<link:usedOn>link:definitionLink</link:usedOn>
			<link:usedOn>link:calculationLink</link:usedOn>
		</link:roleType>
		<link:roleType roleURI="http://www.williamblairfunds.com/11/role/ExpenseExampleNoRedemption" id="wwwwilliamblairfundscom_11_ExpenseExampleNoRedemption">
			<link:definition>1120040 - Disclosure - S000008604 [Member] Expense Example, No Redemption</link:definition>
			<link:usedOn>link:presentationLink</link:usedOn>
			<link:usedOn>link:definitionLink</link:usedOn>
			<link:usedOn>link:calculationLink</link:usedOn>
		</link:roleType>
		<link:roleType roleURI="http://www.williamblairfunds.com/11/role/RiskTableData" id="wwwwilliamblairfundscom_11_RiskTableData">
			<link:definition>1120045 - Disclosure - S000008604 [Member] Risks Data</link:definition>
			<link:usedOn>link:presentationLink</link:usedOn>
			<link:usedOn>link:definitionLink</link:usedOn>
			<link:usedOn>link:calculationLink</link:usedOn>
		</link:roleType>
		<link:roleType roleURI="http://www.williamblairfunds.com/11/role/BarChartData" id="wwwwilliamblairfundscom_11_BarChartData">
			<link:definition>1120050 - Disclosure - S000008604 [Member] Annual Total Returns</link:definition>
			<link:usedOn>link:presentationLink</link:usedOn>
			<link:usedOn>link:definitionLink</link:usedOn>
			<link:usedOn>link:calculationLink</link:usedOn>
		</link:roleType>
		<link:roleType roleURI="http://www.williamblairfunds.com/11/role/PerformanceTableData" id="wwwwilliamblairfundscom_11_PerformanceTableData">
			<link:definition>1120060 - Disclosure - S000008604 [Member] Average Annual Total Returns</link:definition>
			<link:usedOn>link:presentationLink</link:usedOn>
			<link:usedOn>link:definitionLink</link:usedOn>
			<link:usedOn>link:calculationLink</link:usedOn>
		</link:roleType>
		<link:roleType roleURI="http://www.williamblairfunds.com/11/role/MarketIndexPerformanceData" id="wwwwilliamblairfundscom_11_MarketIndexPerformanceData">
			<link:definition>1120070 - Disclosure - S000008604 [Member] Market Index Performance</link:definition>
			<link:usedOn>link:presentationLink</link:usedOn>
			<link:usedOn>link:definitionLink</link:usedOn>
			<link:usedOn>link:calculationLink</link:usedOn>
		</link:roleType>
		<link:roleType roleURI="http://www.williamblairfunds.com/11/role/N1aCover" id="wwwwilliamblairfundscom_11_N1aCover">
			<link:definition>1110000 - Disclosure - S000008604 [Member] N-1A Cover</link:definition>
			<link:usedOn>link:presentationLink</link:usedOn>
			<link:usedOn>link:definitionLink</link:usedOn>
			<link:usedOn>link:calculationLink</link:usedOn>
		</link:roleType>
		<link:roleType roleURI="http://www.williamblairfunds.com/11/role/N1aSupplement" id="wwwwilliamblairfundscom_11_N1aSupplement">
			<link:definition>1110001 - Disclosure - S000008604 [Member] N-1A Supplement</link:definition>
			<link:usedOn>link:presentationLink</link:usedOn>
			<link:usedOn>link:definitionLink</link:usedOn>
			<link:usedOn>link:calculationLink</link:usedOn>
		</link:roleType>
		<link:roleType roleURI="http://www.williamblairfunds.com/12/role/RiskReturn" id="wwwwilliamblairfundscom_12_RiskReturn">
			<link:definition>1210002 - Disclosure - S000008605 [Member] Investment Objectives and Goals</link:definition>
			<link:usedOn>link:presentationLink</link:usedOn>
			<link:usedOn>link:definitionLink</link:usedOn>
			<link:usedOn>link:calculationLink</link:usedOn>
		</link:roleType>
		<link:roleType roleURI="http://www.williamblairfunds.com/12/role/FeesAndExpenses" id="wwwwilliamblairfundscom_12_FeesAndExpenses">
			<link:definition>1210003 - Disclosure - S000008605 [Member] Fees and Expenses</link:definition>
			<link:usedOn>link:presentationLink</link:usedOn>
			<link:usedOn>link:definitionLink</link:usedOn>
			<link:usedOn>link:calculationLink</link:usedOn>
		</link:roleType>
		<link:roleType roleURI="http://www.williamblairfunds.com/12/role/InvestmentStrategy" id="wwwwilliamblairfundscom_12_InvestmentStrategy">
			<link:definition>1210004 - Disclosure - S000008605 [Member] Investment Strategy</link:definition>
			<link:usedOn>link:presentationLink</link:usedOn>
			<link:usedOn>link:definitionLink</link:usedOn>
			<link:usedOn>link:calculationLink</link:usedOn>
		</link:roleType>
		<link:roleType roleURI="http://www.williamblairfunds.com/12/role/InvestmentRisks" id="wwwwilliamblairfundscom_12_InvestmentRisks">
			<link:definition>1210005 - Disclosure - S000008605 [Member] Investment Risks</link:definition>
			<link:usedOn>link:presentationLink</link:usedOn>
			<link:usedOn>link:definitionLink</link:usedOn>
			<link:usedOn>link:calculationLink</link:usedOn>
		</link:roleType>
		<link:roleType roleURI="http://www.williamblairfunds.com/12/role/PerformanceManagement" id="wwwwilliamblairfundscom_12_PerformanceManagement">
			<link:definition>1210006 - Disclosure - S000008605 [Member] Performance Management</link:definition>
			<link:usedOn>link:presentationLink</link:usedOn>
			<link:usedOn>link:definitionLink</link:usedOn>
			<link:usedOn>link:calculationLink</link:usedOn>
		</link:roleType>
		<link:roleType roleURI="http://www.williamblairfunds.com/12/role/ShareholderFeesData" id="wwwwilliamblairfundscom_12_ShareholderFeesData">
			<link:definition>1220010 - Disclosure - S000008605 [Member] Shareholder Fees</link:definition>
			<link:usedOn>link:presentationLink</link:usedOn>
			<link:usedOn>link:definitionLink</link:usedOn>
			<link:usedOn>link:calculationLink</link:usedOn>
		</link:roleType>
		<link:roleType roleURI="http://www.williamblairfunds.com/12/role/OperatingExpensesData" id="wwwwilliamblairfundscom_12_OperatingExpensesData">
			<link:definition>1220020 - Disclosure - S000008605 [Member] Annual Fund Operating Expenses</link:definition>
			<link:usedOn>link:presentationLink</link:usedOn>
			<link:usedOn>link:definitionLink</link:usedOn>
			<link:usedOn>link:calculationLink</link:usedOn>
		</link:roleType>
		<link:roleType roleURI="http://www.williamblairfunds.com/12/role/ExpenseExample" id="wwwwilliamblairfundscom_12_ExpenseExample">
			<link:definition>1220030 - Disclosure - S000008605 [Member] Expense Example</link:definition>
			<link:usedOn>link:presentationLink</link:usedOn>
			<link:usedOn>link:definitionLink</link:usedOn>
			<link:usedOn>link:calculationLink</link:usedOn>
		</link:roleType>
		<link:roleType roleURI="http://www.williamblairfunds.com/12/role/ExpenseExampleNoRedemption" id="wwwwilliamblairfundscom_12_ExpenseExampleNoRedemption">
			<link:definition>1220040 - Disclosure - S000008605 [Member] Expense Example, No Redemption</link:definition>
			<link:usedOn>link:presentationLink</link:usedOn>
			<link:usedOn>link:definitionLink</link:usedOn>
			<link:usedOn>link:calculationLink</link:usedOn>
		</link:roleType>
		<link:roleType roleURI="http://www.williamblairfunds.com/12/role/RiskTableData" id="wwwwilliamblairfundscom_12_RiskTableData">
			<link:definition>1220045 - Disclosure - S000008605 [Member] Risks Data</link:definition>
			<link:usedOn>link:presentationLink</link:usedOn>
			<link:usedOn>link:definitionLink</link:usedOn>
			<link:usedOn>link:calculationLink</link:usedOn>
		</link:roleType>
		<link:roleType roleURI="http://www.williamblairfunds.com/12/role/BarChartData" id="wwwwilliamblairfundscom_12_BarChartData">
			<link:definition>1220050 - Disclosure - S000008605 [Member] Annual Total Returns</link:definition>
			<link:usedOn>link:presentationLink</link:usedOn>
			<link:usedOn>link:definitionLink</link:usedOn>
			<link:usedOn>link:calculationLink</link:usedOn>
		</link:roleType>
		<link:roleType roleURI="http://www.williamblairfunds.com/12/role/PerformanceTableData" id="wwwwilliamblairfundscom_12_PerformanceTableData">
			<link:definition>1220060 - Disclosure - S000008605 [Member] Average Annual Total Returns</link:definition>
			<link:usedOn>link:presentationLink</link:usedOn>
			<link:usedOn>link:definitionLink</link:usedOn>
			<link:usedOn>link:calculationLink</link:usedOn>
		</link:roleType>
		<link:roleType roleURI="http://www.williamblairfunds.com/12/role/MarketIndexPerformanceData" id="wwwwilliamblairfundscom_12_MarketIndexPerformanceData">
			<link:definition>1220070 - Disclosure - S000008605 [Member] Market Index Performance</link:definition>
			<link:usedOn>link:presentationLink</link:usedOn>
			<link:usedOn>link:definitionLink</link:usedOn>
			<link:usedOn>link:calculationLink</link:usedOn>
		</link:roleType>
		<link:roleType roleURI="http://www.williamblairfunds.com/12/role/N1aCover" id="wwwwilliamblairfundscom_12_N1aCover">
			<link:definition>1210000 - Disclosure - S000008605 [Member] N-1A Cover</link:definition>
			<link:usedOn>link:presentationLink</link:usedOn>
			<link:usedOn>link:definitionLink</link:usedOn>
			<link:usedOn>link:calculationLink</link:usedOn>
		</link:roleType>
		<link:roleType roleURI="http://www.williamblairfunds.com/12/role/N1aSupplement" id="wwwwilliamblairfundscom_12_N1aSupplement">
			<link:definition>1210001 - Disclosure - S000008605 [Member] N-1A Supplement</link:definition>
			<link:usedOn>link:presentationLink</link:usedOn>
			<link:usedOn>link:definitionLink</link:usedOn>
			<link:usedOn>link:calculationLink</link:usedOn>
		</link:roleType>
		<link:roleType roleURI="http://www.williamblairfunds.com/13/role/RiskReturn" id="wwwwilliamblairfundscom_13_RiskReturn">
			<link:definition>1310002 - Disclosure - S000008595 [Member] Investment Objectives and Goals</link:definition>
			<link:usedOn>link:presentationLink</link:usedOn>
			<link:usedOn>link:definitionLink</link:usedOn>
			<link:usedOn>link:calculationLink</link:usedOn>
		</link:roleType>
		<link:roleType roleURI="http://www.williamblairfunds.com/13/role/FeesAndExpenses" id="wwwwilliamblairfundscom_13_FeesAndExpenses">
			<link:definition>1310003 - Disclosure - S000008595 [Member] Fees and Expenses</link:definition>
			<link:usedOn>link:presentationLink</link:usedOn>
			<link:usedOn>link:definitionLink</link:usedOn>
			<link:usedOn>link:calculationLink</link:usedOn>
		</link:roleType>
		<link:roleType roleURI="http://www.williamblairfunds.com/13/role/InvestmentStrategy" id="wwwwilliamblairfundscom_13_InvestmentStrategy">
			<link:definition>1310004 - Disclosure - S000008595 [Member] Investment Strategy</link:definition>
			<link:usedOn>link:presentationLink</link:usedOn>
			<link:usedOn>link:definitionLink</link:usedOn>
			<link:usedOn>link:calculationLink</link:usedOn>
		</link:roleType>
		<link:roleType roleURI="http://www.williamblairfunds.com/13/role/InvestmentRisks" id="wwwwilliamblairfundscom_13_InvestmentRisks">
			<link:definition>1310005 - Disclosure - S000008595 [Member] Investment Risks</link:definition>
			<link:usedOn>link:presentationLink</link:usedOn>
			<link:usedOn>link:definitionLink</link:usedOn>
			<link:usedOn>link:calculationLink</link:usedOn>
		</link:roleType>
		<link:roleType roleURI="http://www.williamblairfunds.com/13/role/PerformanceManagement" id="wwwwilliamblairfundscom_13_PerformanceManagement">
			<link:definition>1310006 - Disclosure - S000008595 [Member] Performance Management</link:definition>
			<link:usedOn>link:presentationLink</link:usedOn>
			<link:usedOn>link:definitionLink</link:usedOn>
			<link:usedOn>link:calculationLink</link:usedOn>
		</link:roleType>
		<link:roleType roleURI="http://www.williamblairfunds.com/13/role/ShareholderFeesData" id="wwwwilliamblairfundscom_13_ShareholderFeesData">
			<link:definition>1320010 - Disclosure - S000008595 [Member] Shareholder Fees</link:definition>
			<link:usedOn>link:presentationLink</link:usedOn>
			<link:usedOn>link:definitionLink</link:usedOn>
			<link:usedOn>link:calculationLink</link:usedOn>
		</link:roleType>
		<link:roleType roleURI="http://www.williamblairfunds.com/13/role/OperatingExpensesData" id="wwwwilliamblairfundscom_13_OperatingExpensesData">
			<link:definition>1320020 - Disclosure - S000008595 [Member] Annual Fund Operating Expenses</link:definition>
			<link:usedOn>link:presentationLink</link:usedOn>
			<link:usedOn>link:definitionLink</link:usedOn>
			<link:usedOn>link:calculationLink</link:usedOn>
		</link:roleType>
		<link:roleType roleURI="http://www.williamblairfunds.com/13/role/ExpenseExample" id="wwwwilliamblairfundscom_13_ExpenseExample">
			<link:definition>1320030 - Disclosure - S000008595 [Member] Expense Example</link:definition>
			<link:usedOn>link:presentationLink</link:usedOn>
			<link:usedOn>link:definitionLink</link:usedOn>
			<link:usedOn>link:calculationLink</link:usedOn>
		</link:roleType>
		<link:roleType roleURI="http://www.williamblairfunds.com/13/role/ExpenseExampleNoRedemption" id="wwwwilliamblairfundscom_13_ExpenseExampleNoRedemption">
			<link:definition>1320040 - Disclosure - S000008595 [Member] Expense Example, No Redemption</link:definition>
			<link:usedOn>link:presentationLink</link:usedOn>
			<link:usedOn>link:definitionLink</link:usedOn>
			<link:usedOn>link:calculationLink</link:usedOn>
		</link:roleType>
		<link:roleType roleURI="http://www.williamblairfunds.com/13/role/RiskTableData" id="wwwwilliamblairfundscom_13_RiskTableData">
			<link:definition>1320045 - Disclosure - S000008595 [Member] Risks Data</link:definition>
			<link:usedOn>link:presentationLink</link:usedOn>
			<link:usedOn>link:definitionLink</link:usedOn>
			<link:usedOn>link:calculationLink</link:usedOn>
		</link:roleType>
		<link:roleType roleURI="http://www.williamblairfunds.com/13/role/BarChartData" id="wwwwilliamblairfundscom_13_BarChartData">
			<link:definition>1320050 - Disclosure - S000008595 [Member] Annual Total Returns</link:definition>
			<link:usedOn>link:presentationLink</link:usedOn>
			<link:usedOn>link:definitionLink</link:usedOn>
			<link:usedOn>link:calculationLink</link:usedOn>
		</link:roleType>
		<link:roleType roleURI="http://www.williamblairfunds.com/13/role/PerformanceTableData" id="wwwwilliamblairfundscom_13_PerformanceTableData">
			<link:definition>1320060 - Disclosure - S000008595 [Member] Average Annual Total Returns</link:definition>
			<link:usedOn>link:presentationLink</link:usedOn>
			<link:usedOn>link:definitionLink</link:usedOn>
			<link:usedOn>link:calculationLink</link:usedOn>
		</link:roleType>
		<link:roleType roleURI="http://www.williamblairfunds.com/13/role/MarketIndexPerformanceData" id="wwwwilliamblairfundscom_13_MarketIndexPerformanceData">
			<link:definition>1320070 - Disclosure - S000008595 [Member] Market Index Performance</link:definition>
			<link:usedOn>link:presentationLink</link:usedOn>
			<link:usedOn>link:definitionLink</link:usedOn>
			<link:usedOn>link:calculationLink</link:usedOn>
		</link:roleType>
		<link:roleType roleURI="http://www.williamblairfunds.com/13/role/N1aCover" id="wwwwilliamblairfundscom_13_N1aCover">
			<link:definition>1310000 - Disclosure - S000008595 [Member] N-1A Cover</link:definition>
			<link:usedOn>link:presentationLink</link:usedOn>
			<link:usedOn>link:definitionLink</link:usedOn>
			<link:usedOn>link:calculationLink</link:usedOn>
		</link:roleType>
		<link:roleType roleURI="http://www.williamblairfunds.com/13/role/N1aSupplement" id="wwwwilliamblairfundscom_13_N1aSupplement">
			<link:definition>1310001 - Disclosure - S000008595 [Member] N-1A Supplement</link:definition>
			<link:usedOn>link:presentationLink</link:usedOn>
			<link:usedOn>link:definitionLink</link:usedOn>
			<link:usedOn>link:calculationLink</link:usedOn>
		</link:roleType>
		<link:roleType roleURI="http://www.williamblairfunds.com/14/role/RiskReturn" id="wwwwilliamblairfundscom_14_RiskReturn">
			<link:definition>1410002 - Disclosure - S000021052 [Member] Investment Objectives and Goals</link:definition>
			<link:usedOn>link:presentationLink</link:usedOn>
			<link:usedOn>link:definitionLink</link:usedOn>
			<link:usedOn>link:calculationLink</link:usedOn>
		</link:roleType>
		<link:roleType roleURI="http://www.williamblairfunds.com/14/role/FeesAndExpenses" id="wwwwilliamblairfundscom_14_FeesAndExpenses">
			<link:definition>1410003 - Disclosure - S000021052 [Member] Fees and Expenses</link:definition>
			<link:usedOn>link:presentationLink</link:usedOn>
			<link:usedOn>link:definitionLink</link:usedOn>
			<link:usedOn>link:calculationLink</link:usedOn>
		</link:roleType>
		<link:roleType roleURI="http://www.williamblairfunds.com/14/role/InvestmentStrategy" id="wwwwilliamblairfundscom_14_InvestmentStrategy">
			<link:definition>1410004 - Disclosure - S000021052 [Member] Investment Strategy</link:definition>
			<link:usedOn>link:presentationLink</link:usedOn>
			<link:usedOn>link:definitionLink</link:usedOn>
			<link:usedOn>link:calculationLink</link:usedOn>
		</link:roleType>
		<link:roleType roleURI="http://www.williamblairfunds.com/14/role/InvestmentRisks" id="wwwwilliamblairfundscom_14_InvestmentRisks">
			<link:definition>1410005 - Disclosure - S000021052 [Member] Investment Risks</link:definition>
			<link:usedOn>link:presentationLink</link:usedOn>
			<link:usedOn>link:definitionLink</link:usedOn>
			<link:usedOn>link:calculationLink</link:usedOn>
		</link:roleType>
		<link:roleType roleURI="http://www.williamblairfunds.com/14/role/PerformanceManagement" id="wwwwilliamblairfundscom_14_PerformanceManagement">
			<link:definition>1410006 - Disclosure - S000021052 [Member] Performance Management</link:definition>
			<link:usedOn>link:presentationLink</link:usedOn>
			<link:usedOn>link:definitionLink</link:usedOn>
			<link:usedOn>link:calculationLink</link:usedOn>
		</link:roleType>
		<link:roleType roleURI="http://www.williamblairfunds.com/14/role/ShareholderFeesData" id="wwwwilliamblairfundscom_14_ShareholderFeesData">
			<link:definition>1420010 - Disclosure - S000021052 [Member] Shareholder Fees</link:definition>
			<link:usedOn>link:presentationLink</link:usedOn>
			<link:usedOn>link:definitionLink</link:usedOn>
			<link:usedOn>link:calculationLink</link:usedOn>
		</link:roleType>
		<link:roleType roleURI="http://www.williamblairfunds.com/14/role/OperatingExpensesData" id="wwwwilliamblairfundscom_14_OperatingExpensesData">
			<link:definition>1420020 - Disclosure - S000021052 [Member] Annual Fund Operating Expenses</link:definition>
			<link:usedOn>link:presentationLink</link:usedOn>
			<link:usedOn>link:definitionLink</link:usedOn>
			<link:usedOn>link:calculationLink</link:usedOn>
		</link:roleType>
		<link:roleType roleURI="http://www.williamblairfunds.com/14/role/ExpenseExample" id="wwwwilliamblairfundscom_14_ExpenseExample">
			<link:definition>1420030 - Disclosure - S000021052 [Member] Expense Example</link:definition>
			<link:usedOn>link:presentationLink</link:usedOn>
			<link:usedOn>link:definitionLink</link:usedOn>
			<link:usedOn>link:calculationLink</link:usedOn>
		</link:roleType>
		<link:roleType roleURI="http://www.williamblairfunds.com/14/role/ExpenseExampleNoRedemption" id="wwwwilliamblairfundscom_14_ExpenseExampleNoRedemption">
			<link:definition>1420040 - Disclosure - S000021052 [Member] Expense Example, No Redemption</link:definition>
			<link:usedOn>link:presentationLink</link:usedOn>
			<link:usedOn>link:definitionLink</link:usedOn>
			<link:usedOn>link:calculationLink</link:usedOn>
		</link:roleType>
		<link:roleType roleURI="http://www.williamblairfunds.com/14/role/RiskTableData" id="wwwwilliamblairfundscom_14_RiskTableData">
			<link:definition>1420045 - Disclosure - S000021052 [Member] Risks Data</link:definition>
			<link:usedOn>link:presentationLink</link:usedOn>
			<link:usedOn>link:definitionLink</link:usedOn>
			<link:usedOn>link:calculationLink</link:usedOn>
		</link:roleType>
		<link:roleType roleURI="http://www.williamblairfunds.com/14/role/BarChartData" id="wwwwilliamblairfundscom_14_BarChartData">
			<link:definition>1420050 - Disclosure - S000021052 [Member] Annual Total Returns</link:definition>
			<link:usedOn>link:presentationLink</link:usedOn>
			<link:usedOn>link:definitionLink</link:usedOn>
			<link:usedOn>link:calculationLink</link:usedOn>
		</link:roleType>
		<link:roleType roleURI="http://www.williamblairfunds.com/14/role/PerformanceTableData" id="wwwwilliamblairfundscom_14_PerformanceTableData">
			<link:definition>1420060 - Disclosure - S000021052 [Member] Average Annual Total Returns</link:definition>
			<link:usedOn>link:presentationLink</link:usedOn>
			<link:usedOn>link:definitionLink</link:usedOn>
			<link:usedOn>link:calculationLink</link:usedOn>
		</link:roleType>
		<link:roleType roleURI="http://www.williamblairfunds.com/14/role/MarketIndexPerformanceData" id="wwwwilliamblairfundscom_14_MarketIndexPerformanceData">
			<link:definition>1420070 - Disclosure - S000021052 [Member] Market Index Performance</link:definition>
			<link:usedOn>link:presentationLink</link:usedOn>
			<link:usedOn>link:definitionLink</link:usedOn>
			<link:usedOn>link:calculationLink</link:usedOn>
		</link:roleType>
		<link:roleType roleURI="http://www.williamblairfunds.com/14/role/N1aCover" id="wwwwilliamblairfundscom_14_N1aCover">
			<link:definition>1410000 - Disclosure - S000021052 [Member] N-1A Cover</link:definition>
			<link:usedOn>link:presentationLink</link:usedOn>
			<link:usedOn>link:definitionLink</link:usedOn>
			<link:usedOn>link:calculationLink</link:usedOn>
		</link:roleType>
		<link:roleType roleURI="http://www.williamblairfunds.com/14/role/N1aSupplement" id="wwwwilliamblairfundscom_14_N1aSupplement">
			<link:definition>1410001 - Disclosure - S000021052 [Member] N-1A Supplement</link:definition>
			<link:usedOn>link:presentationLink</link:usedOn>
			<link:usedOn>link:definitionLink</link:usedOn>
			<link:usedOn>link:calculationLink</link:usedOn>
		</link:roleType>
		<link:roleType roleURI="http://www.williamblairfunds.com/15/role/RiskReturn" id="wwwwilliamblairfundscom_15_RiskReturn">
			<link:definition>1510002 - Disclosure - S000008596 [Member] Investment Objectives and Goals</link:definition>
			<link:usedOn>link:presentationLink</link:usedOn>
			<link:usedOn>link:definitionLink</link:usedOn>
			<link:usedOn>link:calculationLink</link:usedOn>
		</link:roleType>
		<link:roleType roleURI="http://www.williamblairfunds.com/15/role/FeesAndExpenses" id="wwwwilliamblairfundscom_15_FeesAndExpenses">
			<link:definition>1510003 - Disclosure - S000008596 [Member] Fees and Expenses</link:definition>
			<link:usedOn>link:presentationLink</link:usedOn>
			<link:usedOn>link:definitionLink</link:usedOn>
			<link:usedOn>link:calculationLink</link:usedOn>
		</link:roleType>
		<link:roleType roleURI="http://www.williamblairfunds.com/15/role/InvestmentStrategy" id="wwwwilliamblairfundscom_15_InvestmentStrategy">
			<link:definition>1510004 - Disclosure - S000008596 [Member] Investment Strategy</link:definition>
			<link:usedOn>link:presentationLink</link:usedOn>
			<link:usedOn>link:definitionLink</link:usedOn>
			<link:usedOn>link:calculationLink</link:usedOn>
		</link:roleType>
		<link:roleType roleURI="http://www.williamblairfunds.com/15/role/InvestmentRisks" id="wwwwilliamblairfundscom_15_InvestmentRisks">
			<link:definition>1510005 - Disclosure - S000008596 [Member] Investment Risks</link:definition>
			<link:usedOn>link:presentationLink</link:usedOn>
			<link:usedOn>link:definitionLink</link:usedOn>
			<link:usedOn>link:calculationLink</link:usedOn>
		</link:roleType>
		<link:roleType roleURI="http://www.williamblairfunds.com/15/role/PerformanceManagement" id="wwwwilliamblairfundscom_15_PerformanceManagement">
			<link:definition>1510006 - Disclosure - S000008596 [Member] Performance Management</link:definition>
			<link:usedOn>link:presentationLink</link:usedOn>
			<link:usedOn>link:definitionLink</link:usedOn>
			<link:usedOn>link:calculationLink</link:usedOn>
		</link:roleType>
		<link:roleType roleURI="http://www.williamblairfunds.com/15/role/ShareholderFeesData" id="wwwwilliamblairfundscom_15_ShareholderFeesData">
			<link:definition>1520010 - Disclosure - S000008596 [Member] Shareholder Fees</link:definition>
			<link:usedOn>link:presentationLink</link:usedOn>
			<link:usedOn>link:definitionLink</link:usedOn>
			<link:usedOn>link:calculationLink</link:usedOn>
		</link:roleType>
		<link:roleType roleURI="http://www.williamblairfunds.com/15/role/OperatingExpensesData" id="wwwwilliamblairfundscom_15_OperatingExpensesData">
			<link:definition>1520020 - Disclosure - S000008596 [Member] Annual Fund Operating Expenses</link:definition>
			<link:usedOn>link:presentationLink</link:usedOn>
			<link:usedOn>link:definitionLink</link:usedOn>
			<link:usedOn>link:calculationLink</link:usedOn>
		</link:roleType>
		<link:roleType roleURI="http://www.williamblairfunds.com/15/role/ExpenseExample" id="wwwwilliamblairfundscom_15_ExpenseExample">
			<link:definition>1520030 - Disclosure - S000008596 [Member] Expense Example</link:definition>
			<link:usedOn>link:presentationLink</link:usedOn>
			<link:usedOn>link:definitionLink</link:usedOn>
			<link:usedOn>link:calculationLink</link:usedOn>
		</link:roleType>
		<link:roleType roleURI="http://www.williamblairfunds.com/15/role/ExpenseExampleNoRedemption" id="wwwwilliamblairfundscom_15_ExpenseExampleNoRedemption">
			<link:definition>1520040 - Disclosure - S000008596 [Member] Expense Example, No Redemption</link:definition>
			<link:usedOn>link:presentationLink</link:usedOn>
			<link:usedOn>link:definitionLink</link:usedOn>
			<link:usedOn>link:calculationLink</link:usedOn>
		</link:roleType>
		<link:roleType roleURI="http://www.williamblairfunds.com/15/role/RiskTableData" id="wwwwilliamblairfundscom_15_RiskTableData">
			<link:definition>1520045 - Disclosure - S000008596 [Member] Risks Data</link:definition>
			<link:usedOn>link:presentationLink</link:usedOn>
			<link:usedOn>link:definitionLink</link:usedOn>
			<link:usedOn>link:calculationLink</link:usedOn>
		</link:roleType>
		<link:roleType roleURI="http://www.williamblairfunds.com/15/role/BarChartData" id="wwwwilliamblairfundscom_15_BarChartData">
			<link:definition>1520050 - Disclosure - S000008596 [Member] Annual Total Returns</link:definition>
			<link:usedOn>link:presentationLink</link:usedOn>
			<link:usedOn>link:definitionLink</link:usedOn>
			<link:usedOn>link:calculationLink</link:usedOn>
		</link:roleType>
		<link:roleType roleURI="http://www.williamblairfunds.com/15/role/PerformanceTableData" id="wwwwilliamblairfundscom_15_PerformanceTableData">
			<link:definition>1520060 - Disclosure - S000008596 [Member] Average Annual Total Returns</link:definition>
			<link:usedOn>link:presentationLink</link:usedOn>
			<link:usedOn>link:definitionLink</link:usedOn>
			<link:usedOn>link:calculationLink</link:usedOn>
		</link:roleType>
		<link:roleType roleURI="http://www.williamblairfunds.com/15/role/MarketIndexPerformanceData" id="wwwwilliamblairfundscom_15_MarketIndexPerformanceData">
			<link:definition>1520070 - Disclosure - S000008596 [Member] Market Index Performance</link:definition>
			<link:usedOn>link:presentationLink</link:usedOn>
			<link:usedOn>link:definitionLink</link:usedOn>
			<link:usedOn>link:calculationLink</link:usedOn>
		</link:roleType>
		<link:roleType roleURI="http://www.williamblairfunds.com/15/role/N1aCover" id="wwwwilliamblairfundscom_15_N1aCover">
			<link:definition>1510000 - Disclosure - S000008596 [Member] N-1A Cover</link:definition>
			<link:usedOn>link:presentationLink</link:usedOn>
			<link:usedOn>link:definitionLink</link:usedOn>
			<link:usedOn>link:calculationLink</link:usedOn>
		</link:roleType>
		<link:roleType roleURI="http://www.williamblairfunds.com/15/role/N1aSupplement" id="wwwwilliamblairfundscom_15_N1aSupplement">
			<link:definition>1510001 - Disclosure - S000008596 [Member] N-1A Supplement</link:definition>
			<link:usedOn>link:presentationLink</link:usedOn>
			<link:usedOn>link:definitionLink</link:usedOn>
			<link:usedOn>link:calculationLink</link:usedOn>
		</link:roleType>
		<link:roleType roleURI="http://www.williamblairfunds.com/16/role/RiskReturn" id="wwwwilliamblairfundscom_16_RiskReturn">
			<link:definition>1610002 - Disclosure - S000075390 [Member] Investment Objectives and Goals</link:definition>
			<link:usedOn>link:presentationLink</link:usedOn>
			<link:usedOn>link:definitionLink</link:usedOn>
			<link:usedOn>link:calculationLink</link:usedOn>
		</link:roleType>
		<link:roleType roleURI="http://www.williamblairfunds.com/16/role/FeesAndExpenses" id="wwwwilliamblairfundscom_16_FeesAndExpenses">
			<link:definition>1610003 - Disclosure - S000075390 [Member] Fees and Expenses</link:definition>
			<link:usedOn>link:presentationLink</link:usedOn>
			<link:usedOn>link:definitionLink</link:usedOn>
			<link:usedOn>link:calculationLink</link:usedOn>
		</link:roleType>
		<link:roleType roleURI="http://www.williamblairfunds.com/16/role/InvestmentStrategy" id="wwwwilliamblairfundscom_16_InvestmentStrategy">
			<link:definition>1610004 - Disclosure - S000075390 [Member] Investment Strategy</link:definition>
			<link:usedOn>link:presentationLink</link:usedOn>
			<link:usedOn>link:definitionLink</link:usedOn>
			<link:usedOn>link:calculationLink</link:usedOn>
		</link:roleType>
		<link:roleType roleURI="http://www.williamblairfunds.com/16/role/InvestmentRisks" id="wwwwilliamblairfundscom_16_InvestmentRisks">
			<link:definition>1610005 - Disclosure - S000075390 [Member] Investment Risks</link:definition>
			<link:usedOn>link:presentationLink</link:usedOn>
			<link:usedOn>link:definitionLink</link:usedOn>
			<link:usedOn>link:calculationLink</link:usedOn>
		</link:roleType>
		<link:roleType roleURI="http://www.williamblairfunds.com/16/role/PerformanceManagement" id="wwwwilliamblairfundscom_16_PerformanceManagement">
			<link:definition>1610006 - Disclosure - S000075390 [Member] Performance Management</link:definition>
			<link:usedOn>link:presentationLink</link:usedOn>
			<link:usedOn>link:definitionLink</link:usedOn>
			<link:usedOn>link:calculationLink</link:usedOn>
		</link:roleType>
		<link:roleType roleURI="http://www.williamblairfunds.com/16/role/ShareholderFeesData" id="wwwwilliamblairfundscom_16_ShareholderFeesData">
			<link:definition>1620010 - Disclosure - S000075390 [Member] Shareholder Fees</link:definition>
			<link:usedOn>link:presentationLink</link:usedOn>
			<link:usedOn>link:definitionLink</link:usedOn>
			<link:usedOn>link:calculationLink</link:usedOn>
		</link:roleType>
		<link:roleType roleURI="http://www.williamblairfunds.com/16/role/OperatingExpensesData" id="wwwwilliamblairfundscom_16_OperatingExpensesData">
			<link:definition>1620020 - Disclosure - S000075390 [Member] Annual Fund Operating Expenses</link:definition>
			<link:usedOn>link:presentationLink</link:usedOn>
			<link:usedOn>link:definitionLink</link:usedOn>
			<link:usedOn>link:calculationLink</link:usedOn>
		</link:roleType>
		<link:roleType roleURI="http://www.williamblairfunds.com/16/role/ExpenseExample" id="wwwwilliamblairfundscom_16_ExpenseExample">
			<link:definition>1620030 - Disclosure - S000075390 [Member] Expense Example</link:definition>
			<link:usedOn>link:presentationLink</link:usedOn>
			<link:usedOn>link:definitionLink</link:usedOn>
			<link:usedOn>link:calculationLink</link:usedOn>
		</link:roleType>
		<link:roleType roleURI="http://www.williamblairfunds.com/16/role/ExpenseExampleNoRedemption" id="wwwwilliamblairfundscom_16_ExpenseExampleNoRedemption">
			<link:definition>1620040 - Disclosure - S000075390 [Member] Expense Example, No Redemption</link:definition>
			<link:usedOn>link:presentationLink</link:usedOn>
			<link:usedOn>link:definitionLink</link:usedOn>
			<link:usedOn>link:calculationLink</link:usedOn>
		</link:roleType>
		<link:roleType roleURI="http://www.williamblairfunds.com/16/role/RiskTableData" id="wwwwilliamblairfundscom_16_RiskTableData">
			<link:definition>1620045 - Disclosure - S000075390 [Member] Risks Data</link:definition>
			<link:usedOn>link:presentationLink</link:usedOn>
			<link:usedOn>link:definitionLink</link:usedOn>
			<link:usedOn>link:calculationLink</link:usedOn>
		</link:roleType>
		<link:roleType roleURI="http://www.williamblairfunds.com/16/role/BarChartData" id="wwwwilliamblairfundscom_16_BarChartData">
			<link:definition>1620050 - Disclosure - S000075390 [Member] Annual Total Returns</link:definition>
			<link:usedOn>link:presentationLink</link:usedOn>
			<link:usedOn>link:definitionLink</link:usedOn>
			<link:usedOn>link:calculationLink</link:usedOn>
		</link:roleType>
		<link:roleType roleURI="http://www.williamblairfunds.com/16/role/PerformanceTableData" id="wwwwilliamblairfundscom_16_PerformanceTableData">
			<link:definition>1620060 - Disclosure - S000075390 [Member] Average Annual Total Returns</link:definition>
			<link:usedOn>link:presentationLink</link:usedOn>
			<link:usedOn>link:definitionLink</link:usedOn>
			<link:usedOn>link:calculationLink</link:usedOn>
		</link:roleType>
		<link:roleType roleURI="http://www.williamblairfunds.com/16/role/MarketIndexPerformanceData" id="wwwwilliamblairfundscom_16_MarketIndexPerformanceData">
			<link:definition>1620070 - Disclosure - S000075390 [Member] Market Index Performance</link:definition>
			<link:usedOn>link:presentationLink</link:usedOn>
			<link:usedOn>link:definitionLink</link:usedOn>
			<link:usedOn>link:calculationLink</link:usedOn>
		</link:roleType>
		<link:roleType roleURI="http://www.williamblairfunds.com/16/role/N1aCover" id="wwwwilliamblairfundscom_16_N1aCover">
			<link:definition>1610000 - Disclosure - S000075390 [Member] N-1A Cover</link:definition>
			<link:usedOn>link:presentationLink</link:usedOn>
			<link:usedOn>link:definitionLink</link:usedOn>
			<link:usedOn>link:calculationLink</link:usedOn>
		</link:roleType>
		<link:roleType roleURI="http://www.williamblairfunds.com/16/role/N1aSupplement" id="wwwwilliamblairfundscom_16_N1aSupplement">
			<link:definition>1610001 - Disclosure - S000075390 [Member] N-1A Supplement</link:definition>
			<link:usedOn>link:presentationLink</link:usedOn>
			<link:usedOn>link:definitionLink</link:usedOn>
			<link:usedOn>link:calculationLink</link:usedOn>
		</link:roleType>
		<link:roleType roleURI="http://www.williamblairfunds.com/17/role/RiskReturn" id="wwwwilliamblairfundscom_17_RiskReturn">
			<link:definition>1710002 - Disclosure - S000034349 [Member] Investment Objectives and Goals</link:definition>
			<link:usedOn>link:presentationLink</link:usedOn>
			<link:usedOn>link:definitionLink</link:usedOn>
			<link:usedOn>link:calculationLink</link:usedOn>
		</link:roleType>
		<link:roleType roleURI="http://www.williamblairfunds.com/17/role/FeesAndExpenses" id="wwwwilliamblairfundscom_17_FeesAndExpenses">
			<link:definition>1710003 - Disclosure - S000034349 [Member] Fees and Expenses</link:definition>
			<link:usedOn>link:presentationLink</link:usedOn>
			<link:usedOn>link:definitionLink</link:usedOn>
			<link:usedOn>link:calculationLink</link:usedOn>
		</link:roleType>
		<link:roleType roleURI="http://www.williamblairfunds.com/17/role/InvestmentStrategy" id="wwwwilliamblairfundscom_17_InvestmentStrategy">
			<link:definition>1710004 - Disclosure - S000034349 [Member] Investment Strategy</link:definition>
			<link:usedOn>link:presentationLink</link:usedOn>
			<link:usedOn>link:definitionLink</link:usedOn>
			<link:usedOn>link:calculationLink</link:usedOn>
		</link:roleType>
		<link:roleType roleURI="http://www.williamblairfunds.com/17/role/InvestmentRisks" id="wwwwilliamblairfundscom_17_InvestmentRisks">
			<link:definition>1710005 - Disclosure - S000034349 [Member] Investment Risks</link:definition>
			<link:usedOn>link:presentationLink</link:usedOn>
			<link:usedOn>link:definitionLink</link:usedOn>
			<link:usedOn>link:calculationLink</link:usedOn>
		</link:roleType>
		<link:roleType roleURI="http://www.williamblairfunds.com/17/role/PerformanceManagement" id="wwwwilliamblairfundscom_17_PerformanceManagement">
			<link:definition>1710006 - Disclosure - S000034349 [Member] Performance Management</link:definition>
			<link:usedOn>link:presentationLink</link:usedOn>
			<link:usedOn>link:definitionLink</link:usedOn>
			<link:usedOn>link:calculationLink</link:usedOn>
		</link:roleType>
		<link:roleType roleURI="http://www.williamblairfunds.com/17/role/ShareholderFeesData" id="wwwwilliamblairfundscom_17_ShareholderFeesData">
			<link:definition>1720010 - Disclosure - S000034349 [Member] Shareholder Fees</link:definition>
			<link:usedOn>link:presentationLink</link:usedOn>
			<link:usedOn>link:definitionLink</link:usedOn>
			<link:usedOn>link:calculationLink</link:usedOn>
		</link:roleType>
		<link:roleType roleURI="http://www.williamblairfunds.com/17/role/OperatingExpensesData" id="wwwwilliamblairfundscom_17_OperatingExpensesData">
			<link:definition>1720020 - Disclosure - S000034349 [Member] Annual Fund Operating Expenses</link:definition>
			<link:usedOn>link:presentationLink</link:usedOn>
			<link:usedOn>link:definitionLink</link:usedOn>
			<link:usedOn>link:calculationLink</link:usedOn>
		</link:roleType>
		<link:roleType roleURI="http://www.williamblairfunds.com/17/role/ExpenseExample" id="wwwwilliamblairfundscom_17_ExpenseExample">
			<link:definition>1720030 - Disclosure - S000034349 [Member] Expense Example</link:definition>
			<link:usedOn>link:presentationLink</link:usedOn>
			<link:usedOn>link:definitionLink</link:usedOn>
			<link:usedOn>link:calculationLink</link:usedOn>
		</link:roleType>
		<link:roleType roleURI="http://www.williamblairfunds.com/17/role/ExpenseExampleNoRedemption" id="wwwwilliamblairfundscom_17_ExpenseExampleNoRedemption">
			<link:definition>1720040 - Disclosure - S000034349 [Member] Expense Example, No Redemption</link:definition>
			<link:usedOn>link:presentationLink</link:usedOn>
			<link:usedOn>link:definitionLink</link:usedOn>
			<link:usedOn>link:calculationLink</link:usedOn>
		</link:roleType>
		<link:roleType roleURI="http://www.williamblairfunds.com/17/role/RiskTableData" id="wwwwilliamblairfundscom_17_RiskTableData">
			<link:definition>1720045 - Disclosure - S000034349 [Member] Risks Data</link:definition>
			<link:usedOn>link:presentationLink</link:usedOn>
			<link:usedOn>link:definitionLink</link:usedOn>
			<link:usedOn>link:calculationLink</link:usedOn>
		</link:roleType>
		<link:roleType roleURI="http://www.williamblairfunds.com/17/role/BarChartData" id="wwwwilliamblairfundscom_17_BarChartData">
			<link:definition>1720050 - Disclosure - S000034349 [Member] Annual Total Returns</link:definition>
			<link:usedOn>link:presentationLink</link:usedOn>
			<link:usedOn>link:definitionLink</link:usedOn>
			<link:usedOn>link:calculationLink</link:usedOn>
		</link:roleType>
		<link:roleType roleURI="http://www.williamblairfunds.com/17/role/PerformanceTableData" id="wwwwilliamblairfundscom_17_PerformanceTableData">
			<link:definition>1720060 - Disclosure - S000034349 [Member] Average Annual Total Returns</link:definition>
			<link:usedOn>link:presentationLink</link:usedOn>
			<link:usedOn>link:definitionLink</link:usedOn>
			<link:usedOn>link:calculationLink</link:usedOn>
		</link:roleType>
		<link:roleType roleURI="http://www.williamblairfunds.com/17/role/MarketIndexPerformanceData" id="wwwwilliamblairfundscom_17_MarketIndexPerformanceData">
			<link:definition>1720070 - Disclosure - S000034349 [Member] Market Index Performance</link:definition>
			<link:usedOn>link:presentationLink</link:usedOn>
			<link:usedOn>link:definitionLink</link:usedOn>
			<link:usedOn>link:calculationLink</link:usedOn>
		</link:roleType>
		<link:roleType roleURI="http://www.williamblairfunds.com/17/role/N1aCover" id="wwwwilliamblairfundscom_17_N1aCover">
			<link:definition>1710000 - Disclosure - S000034349 [Member] N-1A Cover</link:definition>
			<link:usedOn>link:presentationLink</link:usedOn>
			<link:usedOn>link:definitionLink</link:usedOn>
			<link:usedOn>link:calculationLink</link:usedOn>
		</link:roleType>
		<link:roleType roleURI="http://www.williamblairfunds.com/17/role/N1aSupplement" id="wwwwilliamblairfundscom_17_N1aSupplement">
			<link:definition>1710001 - Disclosure - S000034349 [Member] N-1A Supplement</link:definition>
			<link:usedOn>link:presentationLink</link:usedOn>
			<link:usedOn>link:definitionLink</link:usedOn>
			<link:usedOn>link:calculationLink</link:usedOn>
		</link:roleType>
		<link:roleType roleURI="http://www.williamblairfunds.com/18/role/RiskReturn" id="wwwwilliamblairfundscom_18_RiskReturn">
			<link:definition>1810002 - Disclosure - S000072753 [Member] Investment Objectives and Goals</link:definition>
			<link:usedOn>link:presentationLink</link:usedOn>
			<link:usedOn>link:definitionLink</link:usedOn>
			<link:usedOn>link:calculationLink</link:usedOn>
		</link:roleType>
		<link:roleType roleURI="http://www.williamblairfunds.com/18/role/FeesAndExpenses" id="wwwwilliamblairfundscom_18_FeesAndExpenses">
			<link:definition>1810003 - Disclosure - S000072753 [Member] Fees and Expenses</link:definition>
			<link:usedOn>link:presentationLink</link:usedOn>
			<link:usedOn>link:definitionLink</link:usedOn>
			<link:usedOn>link:calculationLink</link:usedOn>
		</link:roleType>
		<link:roleType roleURI="http://www.williamblairfunds.com/18/role/InvestmentStrategy" id="wwwwilliamblairfundscom_18_InvestmentStrategy">
			<link:definition>1810004 - Disclosure - S000072753 [Member] Investment Strategy</link:definition>
			<link:usedOn>link:presentationLink</link:usedOn>
			<link:usedOn>link:definitionLink</link:usedOn>
			<link:usedOn>link:calculationLink</link:usedOn>
		</link:roleType>
		<link:roleType roleURI="http://www.williamblairfunds.com/18/role/InvestmentRisks" id="wwwwilliamblairfundscom_18_InvestmentRisks">
			<link:definition>1810005 - Disclosure - S000072753 [Member] Investment Risks</link:definition>
			<link:usedOn>link:presentationLink</link:usedOn>
			<link:usedOn>link:definitionLink</link:usedOn>
			<link:usedOn>link:calculationLink</link:usedOn>
		</link:roleType>
		<link:roleType roleURI="http://www.williamblairfunds.com/18/role/PerformanceManagement" id="wwwwilliamblairfundscom_18_PerformanceManagement">
			<link:definition>1810006 - Disclosure - S000072753 [Member] Performance Management</link:definition>
			<link:usedOn>link:presentationLink</link:usedOn>
			<link:usedOn>link:definitionLink</link:usedOn>
			<link:usedOn>link:calculationLink</link:usedOn>
		</link:roleType>
		<link:roleType roleURI="http://www.williamblairfunds.com/18/role/ShareholderFeesData" id="wwwwilliamblairfundscom_18_ShareholderFeesData">
			<link:definition>1820010 - Disclosure - S000072753 [Member] Shareholder Fees</link:definition>
			<link:usedOn>link:presentationLink</link:usedOn>
			<link:usedOn>link:definitionLink</link:usedOn>
			<link:usedOn>link:calculationLink</link:usedOn>
		</link:roleType>
		<link:roleType roleURI="http://www.williamblairfunds.com/18/role/OperatingExpensesData" id="wwwwilliamblairfundscom_18_OperatingExpensesData">
			<link:definition>1820020 - Disclosure - S000072753 [Member] Annual Fund Operating Expenses</link:definition>
			<link:usedOn>link:presentationLink</link:usedOn>
			<link:usedOn>link:definitionLink</link:usedOn>
			<link:usedOn>link:calculationLink</link:usedOn>
		</link:roleType>
		<link:roleType roleURI="http://www.williamblairfunds.com/18/role/ExpenseExample" id="wwwwilliamblairfundscom_18_ExpenseExample">
			<link:definition>1820030 - Disclosure - S000072753 [Member] Expense Example</link:definition>
			<link:usedOn>link:presentationLink</link:usedOn>
			<link:usedOn>link:definitionLink</link:usedOn>
			<link:usedOn>link:calculationLink</link:usedOn>
		</link:roleType>
		<link:roleType roleURI="http://www.williamblairfunds.com/18/role/ExpenseExampleNoRedemption" id="wwwwilliamblairfundscom_18_ExpenseExampleNoRedemption">
			<link:definition>1820040 - Disclosure - S000072753 [Member] Expense Example, No Redemption</link:definition>
			<link:usedOn>link:presentationLink</link:usedOn>
			<link:usedOn>link:definitionLink</link:usedOn>
			<link:usedOn>link:calculationLink</link:usedOn>
		</link:roleType>
		<link:roleType roleURI="http://www.williamblairfunds.com/18/role/RiskTableData" id="wwwwilliamblairfundscom_18_RiskTableData">
			<link:definition>1820045 - Disclosure - S000072753 [Member] Risks Data</link:definition>
			<link:usedOn>link:presentationLink</link:usedOn>
			<link:usedOn>link:definitionLink</link:usedOn>
			<link:usedOn>link:calculationLink</link:usedOn>
		</link:roleType>
		<link:roleType roleURI="http://www.williamblairfunds.com/18/role/BarChartData" id="wwwwilliamblairfundscom_18_BarChartData">
			<link:definition>1820050 - Disclosure - S000072753 [Member] Annual Total Returns</link:definition>
			<link:usedOn>link:presentationLink</link:usedOn>
			<link:usedOn>link:definitionLink</link:usedOn>
			<link:usedOn>link:calculationLink</link:usedOn>
		</link:roleType>
		<link:roleType roleURI="http://www.williamblairfunds.com/18/role/PerformanceTableData" id="wwwwilliamblairfundscom_18_PerformanceTableData">
			<link:definition>1820060 - Disclosure - S000072753 [Member] Average Annual Total Returns</link:definition>
			<link:usedOn>link:presentationLink</link:usedOn>
			<link:usedOn>link:definitionLink</link:usedOn>
			<link:usedOn>link:calculationLink</link:usedOn>
		</link:roleType>
		<link:roleType roleURI="http://www.williamblairfunds.com/18/role/MarketIndexPerformanceData" id="wwwwilliamblairfundscom_18_MarketIndexPerformanceData">
			<link:definition>1820070 - Disclosure - S000072753 [Member] Market Index Performance</link:definition>
			<link:usedOn>link:presentationLink</link:usedOn>
			<link:usedOn>link:definitionLink</link:usedOn>
			<link:usedOn>link:calculationLink</link:usedOn>
		</link:roleType>
		<link:roleType roleURI="http://www.williamblairfunds.com/18/role/N1aCover" id="wwwwilliamblairfundscom_18_N1aCover">
			<link:definition>1810000 - Disclosure - S000072753 [Member] N-1A Cover</link:definition>
			<link:usedOn>link:presentationLink</link:usedOn>
			<link:usedOn>link:definitionLink</link:usedOn>
			<link:usedOn>link:calculationLink</link:usedOn>
		</link:roleType>
		<link:roleType roleURI="http://www.williamblairfunds.com/18/role/N1aSupplement" id="wwwwilliamblairfundscom_18_N1aSupplement">
			<link:definition>1810001 - Disclosure - S000072753 [Member] N-1A Supplement</link:definition>
			<link:usedOn>link:presentationLink</link:usedOn>
			<link:usedOn>link:definitionLink</link:usedOn>
			<link:usedOn>link:calculationLink</link:usedOn>
		</link:roleType>
		<link:roleType roleURI="http://www.williamblairfunds.com/19/role/RiskReturn" id="wwwwilliamblairfundscom_19_RiskReturn">
			<link:definition>1910002 - Disclosure - S000069167 [Member] Investment Objectives and Goals</link:definition>
			<link:usedOn>link:presentationLink</link:usedOn>
			<link:usedOn>link:definitionLink</link:usedOn>
			<link:usedOn>link:calculationLink</link:usedOn>
		</link:roleType>
		<link:roleType roleURI="http://www.williamblairfunds.com/19/role/FeesAndExpenses" id="wwwwilliamblairfundscom_19_FeesAndExpenses">
			<link:definition>1910003 - Disclosure - S000069167 [Member] Fees and Expenses</link:definition>
			<link:usedOn>link:presentationLink</link:usedOn>
			<link:usedOn>link:definitionLink</link:usedOn>
			<link:usedOn>link:calculationLink</link:usedOn>
		</link:roleType>
		<link:roleType roleURI="http://www.williamblairfunds.com/19/role/InvestmentStrategy" id="wwwwilliamblairfundscom_19_InvestmentStrategy">
			<link:definition>1910004 - Disclosure - S000069167 [Member] Investment Strategy</link:definition>
			<link:usedOn>link:presentationLink</link:usedOn>
			<link:usedOn>link:definitionLink</link:usedOn>
			<link:usedOn>link:calculationLink</link:usedOn>
		</link:roleType>
		<link:roleType roleURI="http://www.williamblairfunds.com/19/role/InvestmentRisks" id="wwwwilliamblairfundscom_19_InvestmentRisks">
			<link:definition>1910005 - Disclosure - S000069167 [Member] Investment Risks</link:definition>
			<link:usedOn>link:presentationLink</link:usedOn>
			<link:usedOn>link:definitionLink</link:usedOn>
			<link:usedOn>link:calculationLink</link:usedOn>
		</link:roleType>
		<link:roleType roleURI="http://www.williamblairfunds.com/19/role/PerformanceManagement" id="wwwwilliamblairfundscom_19_PerformanceManagement">
			<link:definition>1910006 - Disclosure - S000069167 [Member] Performance Management</link:definition>
			<link:usedOn>link:presentationLink</link:usedOn>
			<link:usedOn>link:definitionLink</link:usedOn>
			<link:usedOn>link:calculationLink</link:usedOn>
		</link:roleType>
		<link:roleType roleURI="http://www.williamblairfunds.com/19/role/ShareholderFeesData" id="wwwwilliamblairfundscom_19_ShareholderFeesData">
			<link:definition>1920010 - Disclosure - S000069167 [Member] Shareholder Fees</link:definition>
			<link:usedOn>link:presentationLink</link:usedOn>
			<link:usedOn>link:definitionLink</link:usedOn>
			<link:usedOn>link:calculationLink</link:usedOn>
		</link:roleType>
		<link:roleType roleURI="http://www.williamblairfunds.com/19/role/OperatingExpensesData" id="wwwwilliamblairfundscom_19_OperatingExpensesData">
			<link:definition>1920020 - Disclosure - S000069167 [Member] Annual Fund Operating Expenses</link:definition>
			<link:usedOn>link:presentationLink</link:usedOn>
			<link:usedOn>link:definitionLink</link:usedOn>
			<link:usedOn>link:calculationLink</link:usedOn>
		</link:roleType>
		<link:roleType roleURI="http://www.williamblairfunds.com/19/role/ExpenseExample" id="wwwwilliamblairfundscom_19_ExpenseExample">
			<link:definition>1920030 - Disclosure - S000069167 [Member] Expense Example</link:definition>
			<link:usedOn>link:presentationLink</link:usedOn>
			<link:usedOn>link:definitionLink</link:usedOn>
			<link:usedOn>link:calculationLink</link:usedOn>
		</link:roleType>
		<link:roleType roleURI="http://www.williamblairfunds.com/19/role/ExpenseExampleNoRedemption" id="wwwwilliamblairfundscom_19_ExpenseExampleNoRedemption">
			<link:definition>1920040 - Disclosure - S000069167 [Member] Expense Example, No Redemption</link:definition>
			<link:usedOn>link:presentationLink</link:usedOn>
			<link:usedOn>link:definitionLink</link:usedOn>
			<link:usedOn>link:calculationLink</link:usedOn>
		</link:roleType>
		<link:roleType roleURI="http://www.williamblairfunds.com/19/role/RiskTableData" id="wwwwilliamblairfundscom_19_RiskTableData">
			<link:definition>1920045 - Disclosure - S000069167 [Member] Risks Data</link:definition>
			<link:usedOn>link:presentationLink</link:usedOn>
			<link:usedOn>link:definitionLink</link:usedOn>
			<link:usedOn>link:calculationLink</link:usedOn>
		</link:roleType>
		<link:roleType roleURI="http://www.williamblairfunds.com/19/role/BarChartData" id="wwwwilliamblairfundscom_19_BarChartData">
			<link:definition>1920050 - Disclosure - S000069167 [Member] Annual Total Returns</link:definition>
			<link:usedOn>link:presentationLink</link:usedOn>
			<link:usedOn>link:definitionLink</link:usedOn>
			<link:usedOn>link:calculationLink</link:usedOn>
		</link:roleType>
		<link:roleType roleURI="http://www.williamblairfunds.com/19/role/PerformanceTableData" id="wwwwilliamblairfundscom_19_PerformanceTableData">
			<link:definition>1920060 - Disclosure - S000069167 [Member] Average Annual Total Returns</link:definition>
			<link:usedOn>link:presentationLink</link:usedOn>
			<link:usedOn>link:definitionLink</link:usedOn>
			<link:usedOn>link:calculationLink</link:usedOn>
		</link:roleType>
		<link:roleType roleURI="http://www.williamblairfunds.com/19/role/MarketIndexPerformanceData" id="wwwwilliamblairfundscom_19_MarketIndexPerformanceData">
			<link:definition>1920070 - Disclosure - S000069167 [Member] Market Index Performance</link:definition>
			<link:usedOn>link:presentationLink</link:usedOn>
			<link:usedOn>link:definitionLink</link:usedOn>
			<link:usedOn>link:calculationLink</link:usedOn>
		</link:roleType>
		<link:roleType roleURI="http://www.williamblairfunds.com/19/role/N1aCover" id="wwwwilliamblairfundscom_19_N1aCover">
			<link:definition>1910000 - Disclosure - S000069167 [Member] N-1A Cover</link:definition>
			<link:usedOn>link:presentationLink</link:usedOn>
			<link:usedOn>link:definitionLink</link:usedOn>
			<link:usedOn>link:calculationLink</link:usedOn>
		</link:roleType>
		<link:roleType roleURI="http://www.williamblairfunds.com/19/role/N1aSupplement" id="wwwwilliamblairfundscom_19_N1aSupplement">
			<link:definition>1910001 - Disclosure - S000069167 [Member] N-1A Supplement</link:definition>
			<link:usedOn>link:presentationLink</link:usedOn>
			<link:usedOn>link:definitionLink</link:usedOn>
			<link:usedOn>link:calculationLink</link:usedOn>
		</link:roleType>

        <link:linkbase id="lnk">
            <link:roleRef roleURI="http://www.williamblairfunds.com/1/role/RiskReturn" xlink:type="simple" xlink:href="#wwwwilliamblairfundscom_1_RiskReturn"/>
			<link:roleRef roleURI="http://www.williamblairfunds.com/1/role/FeesAndExpenses" xlink:type="simple" xlink:href="#wwwwilliamblairfundscom_1_FeesAndExpenses"/>
			<link:roleRef roleURI="http://www.williamblairfunds.com/1/role/InvestmentStrategy" xlink:type="simple" xlink:href="#wwwwilliamblairfundscom_1_InvestmentStrategy"/>
			<link:roleRef roleURI="http://www.williamblairfunds.com/1/role/InvestmentRisks" xlink:type="simple" xlink:href="#wwwwilliamblairfundscom_1_InvestmentRisks"/>
			<link:roleRef roleURI="http://www.williamblairfunds.com/1/role/PerformanceManagement" xlink:type="simple" xlink:href="#wwwwilliamblairfundscom_1_PerformanceManagement"/>
			<link:roleRef roleURI="http://www.williamblairfunds.com/1/role/ShareholderFeesData" xlink:type="simple" xlink:href="#wwwwilliamblairfundscom_1_ShareholderFeesData"/>
			<link:roleRef roleURI="http://www.williamblairfunds.com/1/role/OperatingExpensesData" xlink:type="simple" xlink:href="#wwwwilliamblairfundscom_1_OperatingExpensesData"/>
			<link:roleRef roleURI="http://www.williamblairfunds.com/1/role/ExpenseExample" xlink:type="simple" xlink:href="#wwwwilliamblairfundscom_1_ExpenseExample"/>
			<link:roleRef roleURI="http://www.williamblairfunds.com/1/role/ExpenseExampleNoRedemption" xlink:type="simple" xlink:href="#wwwwilliamblairfundscom_1_ExpenseExampleNoRedemption"/>
			<link:roleRef roleURI="http://www.williamblairfunds.com/1/role/RiskTableData" xlink:type="simple" xlink:href="#wwwwilliamblairfundscom_1_RiskTableData"/>
			<link:roleRef roleURI="http://www.williamblairfunds.com/1/role/BarChartData" xlink:type="simple" xlink:href="#wwwwilliamblairfundscom_1_BarChartData"/>
			<link:roleRef roleURI="http://www.williamblairfunds.com/1/role/PerformanceTableData" xlink:type="simple" xlink:href="#wwwwilliamblairfundscom_1_PerformanceTableData"/>
			<link:roleRef roleURI="http://www.williamblairfunds.com/1/role/MarketIndexPerformanceData" xlink:type="simple" xlink:href="#wwwwilliamblairfundscom_1_MarketIndexPerformanceData"/>
			<link:roleRef roleURI="http://www.williamblairfunds.com/1/role/N1aCover" xlink:type="simple" xlink:href="#wwwwilliamblairfundscom_1_N1aCover"/>
			<link:roleRef roleURI="http://www.williamblairfunds.com/1/role/N1aSupplement" xlink:type="simple" xlink:href="#wwwwilliamblairfundscom_1_N1aSupplement"/>
			<link:roleRef roleURI="http://www.williamblairfunds.com/2/role/RiskReturn" xlink:type="simple" xlink:href="#wwwwilliamblairfundscom_2_RiskReturn"/>
			<link:roleRef roleURI="http://www.williamblairfunds.com/2/role/FeesAndExpenses" xlink:type="simple" xlink:href="#wwwwilliamblairfundscom_2_FeesAndExpenses"/>
			<link:roleRef roleURI="http://www.williamblairfunds.com/2/role/InvestmentStrategy" xlink:type="simple" xlink:href="#wwwwilliamblairfundscom_2_InvestmentStrategy"/>
			<link:roleRef roleURI="http://www.williamblairfunds.com/2/role/InvestmentRisks" xlink:type="simple" xlink:href="#wwwwilliamblairfundscom_2_InvestmentRisks"/>
			<link:roleRef roleURI="http://www.williamblairfunds.com/2/role/PerformanceManagement" xlink:type="simple" xlink:href="#wwwwilliamblairfundscom_2_PerformanceManagement"/>
			<link:roleRef roleURI="http://www.williamblairfunds.com/2/role/ShareholderFeesData" xlink:type="simple" xlink:href="#wwwwilliamblairfundscom_2_ShareholderFeesData"/>
			<link:roleRef roleURI="http://www.williamblairfunds.com/2/role/OperatingExpensesData" xlink:type="simple" xlink:href="#wwwwilliamblairfundscom_2_OperatingExpensesData"/>
			<link:roleRef roleURI="http://www.williamblairfunds.com/2/role/ExpenseExample" xlink:type="simple" xlink:href="#wwwwilliamblairfundscom_2_ExpenseExample"/>
			<link:roleRef roleURI="http://www.williamblairfunds.com/2/role/ExpenseExampleNoRedemption" xlink:type="simple" xlink:href="#wwwwilliamblairfundscom_2_ExpenseExampleNoRedemption"/>
			<link:roleRef roleURI="http://www.williamblairfunds.com/2/role/RiskTableData" xlink:type="simple" xlink:href="#wwwwilliamblairfundscom_2_RiskTableData"/>
			<link:roleRef roleURI="http://www.williamblairfunds.com/2/role/BarChartData" xlink:type="simple" xlink:href="#wwwwilliamblairfundscom_2_BarChartData"/>
			<link:roleRef roleURI="http://www.williamblairfunds.com/2/role/PerformanceTableData" xlink:type="simple" xlink:href="#wwwwilliamblairfundscom_2_PerformanceTableData"/>
			<link:roleRef roleURI="http://www.williamblairfunds.com/2/role/MarketIndexPerformanceData" xlink:type="simple" xlink:href="#wwwwilliamblairfundscom_2_MarketIndexPerformanceData"/>
			<link:roleRef roleURI="http://www.williamblairfunds.com/2/role/N1aCover" xlink:type="simple" xlink:href="#wwwwilliamblairfundscom_2_N1aCover"/>
			<link:roleRef roleURI="http://www.williamblairfunds.com/2/role/N1aSupplement" xlink:type="simple" xlink:href="#wwwwilliamblairfundscom_2_N1aSupplement"/>
			<link:roleRef roleURI="http://www.williamblairfunds.com/3/role/RiskReturn" xlink:type="simple" xlink:href="#wwwwilliamblairfundscom_3_RiskReturn"/>
			<link:roleRef roleURI="http://www.williamblairfunds.com/3/role/FeesAndExpenses" xlink:type="simple" xlink:href="#wwwwilliamblairfundscom_3_FeesAndExpenses"/>
			<link:roleRef roleURI="http://www.williamblairfunds.com/3/role/InvestmentStrategy" xlink:type="simple" xlink:href="#wwwwilliamblairfundscom_3_InvestmentStrategy"/>
			<link:roleRef roleURI="http://www.williamblairfunds.com/3/role/InvestmentRisks" xlink:type="simple" xlink:href="#wwwwilliamblairfundscom_3_InvestmentRisks"/>
			<link:roleRef roleURI="http://www.williamblairfunds.com/3/role/PerformanceManagement" xlink:type="simple" xlink:href="#wwwwilliamblairfundscom_3_PerformanceManagement"/>
			<link:roleRef roleURI="http://www.williamblairfunds.com/3/role/ShareholderFeesData" xlink:type="simple" xlink:href="#wwwwilliamblairfundscom_3_ShareholderFeesData"/>
			<link:roleRef roleURI="http://www.williamblairfunds.com/3/role/OperatingExpensesData" xlink:type="simple" xlink:href="#wwwwilliamblairfundscom_3_OperatingExpensesData"/>
			<link:roleRef roleURI="http://www.williamblairfunds.com/3/role/ExpenseExample" xlink:type="simple" xlink:href="#wwwwilliamblairfundscom_3_ExpenseExample"/>
			<link:roleRef roleURI="http://www.williamblairfunds.com/3/role/ExpenseExampleNoRedemption" xlink:type="simple" xlink:href="#wwwwilliamblairfundscom_3_ExpenseExampleNoRedemption"/>
			<link:roleRef roleURI="http://www.williamblairfunds.com/3/role/RiskTableData" xlink:type="simple" xlink:href="#wwwwilliamblairfundscom_3_RiskTableData"/>
			<link:roleRef roleURI="http://www.williamblairfunds.com/3/role/BarChartData" xlink:type="simple" xlink:href="#wwwwilliamblairfundscom_3_BarChartData"/>
			<link:roleRef roleURI="http://www.williamblairfunds.com/3/role/PerformanceTableData" xlink:type="simple" xlink:href="#wwwwilliamblairfundscom_3_PerformanceTableData"/>
			<link:roleRef roleURI="http://www.williamblairfunds.com/3/role/MarketIndexPerformanceData" xlink:type="simple" xlink:href="#wwwwilliamblairfundscom_3_MarketIndexPerformanceData"/>
			<link:roleRef roleURI="http://www.williamblairfunds.com/3/role/N1aCover" xlink:type="simple" xlink:href="#wwwwilliamblairfundscom_3_N1aCover"/>
			<link:roleRef roleURI="http://www.williamblairfunds.com/3/role/N1aSupplement" xlink:type="simple" xlink:href="#wwwwilliamblairfundscom_3_N1aSupplement"/>
			<link:roleRef roleURI="http://www.williamblairfunds.com/4/role/RiskReturn" xlink:type="simple" xlink:href="#wwwwilliamblairfundscom_4_RiskReturn"/>
			<link:roleRef roleURI="http://www.williamblairfunds.com/4/role/FeesAndExpenses" xlink:type="simple" xlink:href="#wwwwilliamblairfundscom_4_FeesAndExpenses"/>
			<link:roleRef roleURI="http://www.williamblairfunds.com/4/role/InvestmentStrategy" xlink:type="simple" xlink:href="#wwwwilliamblairfundscom_4_InvestmentStrategy"/>
			<link:roleRef roleURI="http://www.williamblairfunds.com/4/role/InvestmentRisks" xlink:type="simple" xlink:href="#wwwwilliamblairfundscom_4_InvestmentRisks"/>
			<link:roleRef roleURI="http://www.williamblairfunds.com/4/role/PerformanceManagement" xlink:type="simple" xlink:href="#wwwwilliamblairfundscom_4_PerformanceManagement"/>
			<link:roleRef roleURI="http://www.williamblairfunds.com/4/role/ShareholderFeesData" xlink:type="simple" xlink:href="#wwwwilliamblairfundscom_4_ShareholderFeesData"/>
			<link:roleRef roleURI="http://www.williamblairfunds.com/4/role/OperatingExpensesData" xlink:type="simple" xlink:href="#wwwwilliamblairfundscom_4_OperatingExpensesData"/>
			<link:roleRef roleURI="http://www.williamblairfunds.com/4/role/ExpenseExample" xlink:type="simple" xlink:href="#wwwwilliamblairfundscom_4_ExpenseExample"/>
			<link:roleRef roleURI="http://www.williamblairfunds.com/4/role/ExpenseExampleNoRedemption" xlink:type="simple" xlink:href="#wwwwilliamblairfundscom_4_ExpenseExampleNoRedemption"/>
			<link:roleRef roleURI="http://www.williamblairfunds.com/4/role/RiskTableData" xlink:type="simple" xlink:href="#wwwwilliamblairfundscom_4_RiskTableData"/>
			<link:roleRef roleURI="http://www.williamblairfunds.com/4/role/BarChartData" xlink:type="simple" xlink:href="#wwwwilliamblairfundscom_4_BarChartData"/>
			<link:roleRef roleURI="http://www.williamblairfunds.com/4/role/PerformanceTableData" xlink:type="simple" xlink:href="#wwwwilliamblairfundscom_4_PerformanceTableData"/>
			<link:roleRef roleURI="http://www.williamblairfunds.com/4/role/MarketIndexPerformanceData" xlink:type="simple" xlink:href="#wwwwilliamblairfundscom_4_MarketIndexPerformanceData"/>
			<link:roleRef roleURI="http://www.williamblairfunds.com/4/role/N1aCover" xlink:type="simple" xlink:href="#wwwwilliamblairfundscom_4_N1aCover"/>
			<link:roleRef roleURI="http://www.williamblairfunds.com/4/role/N1aSupplement" xlink:type="simple" xlink:href="#wwwwilliamblairfundscom_4_N1aSupplement"/>
			<link:roleRef roleURI="http://www.williamblairfunds.com/5/role/RiskReturn" xlink:type="simple" xlink:href="#wwwwilliamblairfundscom_5_RiskReturn"/>
			<link:roleRef roleURI="http://www.williamblairfunds.com/5/role/FeesAndExpenses" xlink:type="simple" xlink:href="#wwwwilliamblairfundscom_5_FeesAndExpenses"/>
			<link:roleRef roleURI="http://www.williamblairfunds.com/5/role/InvestmentStrategy" xlink:type="simple" xlink:href="#wwwwilliamblairfundscom_5_InvestmentStrategy"/>
			<link:roleRef roleURI="http://www.williamblairfunds.com/5/role/InvestmentRisks" xlink:type="simple" xlink:href="#wwwwilliamblairfundscom_5_InvestmentRisks"/>
			<link:roleRef roleURI="http://www.williamblairfunds.com/5/role/PerformanceManagement" xlink:type="simple" xlink:href="#wwwwilliamblairfundscom_5_PerformanceManagement"/>
			<link:roleRef roleURI="http://www.williamblairfunds.com/5/role/ShareholderFeesData" xlink:type="simple" xlink:href="#wwwwilliamblairfundscom_5_ShareholderFeesData"/>
			<link:roleRef roleURI="http://www.williamblairfunds.com/5/role/OperatingExpensesData" xlink:type="simple" xlink:href="#wwwwilliamblairfundscom_5_OperatingExpensesData"/>
			<link:roleRef roleURI="http://www.williamblairfunds.com/5/role/ExpenseExample" xlink:type="simple" xlink:href="#wwwwilliamblairfundscom_5_ExpenseExample"/>
			<link:roleRef roleURI="http://www.williamblairfunds.com/5/role/ExpenseExampleNoRedemption" xlink:type="simple" xlink:href="#wwwwilliamblairfundscom_5_ExpenseExampleNoRedemption"/>
			<link:roleRef roleURI="http://www.williamblairfunds.com/5/role/RiskTableData" xlink:type="simple" xlink:href="#wwwwilliamblairfundscom_5_RiskTableData"/>
			<link:roleRef roleURI="http://www.williamblairfunds.com/5/role/BarChartData" xlink:type="simple" xlink:href="#wwwwilliamblairfundscom_5_BarChartData"/>
			<link:roleRef roleURI="http://www.williamblairfunds.com/5/role/PerformanceTableData" xlink:type="simple" xlink:href="#wwwwilliamblairfundscom_5_PerformanceTableData"/>
			<link:roleRef roleURI="http://www.williamblairfunds.com/5/role/MarketIndexPerformanceData" xlink:type="simple" xlink:href="#wwwwilliamblairfundscom_5_MarketIndexPerformanceData"/>
			<link:roleRef roleURI="http://www.williamblairfunds.com/5/role/N1aCover" xlink:type="simple" xlink:href="#wwwwilliamblairfundscom_5_N1aCover"/>
			<link:roleRef roleURI="http://www.williamblairfunds.com/5/role/N1aSupplement" xlink:type="simple" xlink:href="#wwwwilliamblairfundscom_5_N1aSupplement"/>
			<link:roleRef roleURI="http://www.williamblairfunds.com/6/role/RiskReturn" xlink:type="simple" xlink:href="#wwwwilliamblairfundscom_6_RiskReturn"/>
			<link:roleRef roleURI="http://www.williamblairfunds.com/6/role/FeesAndExpenses" xlink:type="simple" xlink:href="#wwwwilliamblairfundscom_6_FeesAndExpenses"/>
			<link:roleRef roleURI="http://www.williamblairfunds.com/6/role/InvestmentStrategy" xlink:type="simple" xlink:href="#wwwwilliamblairfundscom_6_InvestmentStrategy"/>
			<link:roleRef roleURI="http://www.williamblairfunds.com/6/role/InvestmentRisks" xlink:type="simple" xlink:href="#wwwwilliamblairfundscom_6_InvestmentRisks"/>
			<link:roleRef roleURI="http://www.williamblairfunds.com/6/role/PerformanceManagement" xlink:type="simple" xlink:href="#wwwwilliamblairfundscom_6_PerformanceManagement"/>
			<link:roleRef roleURI="http://www.williamblairfunds.com/6/role/ShareholderFeesData" xlink:type="simple" xlink:href="#wwwwilliamblairfundscom_6_ShareholderFeesData"/>
			<link:roleRef roleURI="http://www.williamblairfunds.com/6/role/OperatingExpensesData" xlink:type="simple" xlink:href="#wwwwilliamblairfundscom_6_OperatingExpensesData"/>
			<link:roleRef roleURI="http://www.williamblairfunds.com/6/role/ExpenseExample" xlink:type="simple" xlink:href="#wwwwilliamblairfundscom_6_ExpenseExample"/>
			<link:roleRef roleURI="http://www.williamblairfunds.com/6/role/ExpenseExampleNoRedemption" xlink:type="simple" xlink:href="#wwwwilliamblairfundscom_6_ExpenseExampleNoRedemption"/>
			<link:roleRef roleURI="http://www.williamblairfunds.com/6/role/RiskTableData" xlink:type="simple" xlink:href="#wwwwilliamblairfundscom_6_RiskTableData"/>
			<link:roleRef roleURI="http://www.williamblairfunds.com/6/role/BarChartData" xlink:type="simple" xlink:href="#wwwwilliamblairfundscom_6_BarChartData"/>
			<link:roleRef roleURI="http://www.williamblairfunds.com/6/role/PerformanceTableData" xlink:type="simple" xlink:href="#wwwwilliamblairfundscom_6_PerformanceTableData"/>
			<link:roleRef roleURI="http://www.williamblairfunds.com/6/role/MarketIndexPerformanceData" xlink:type="simple" xlink:href="#wwwwilliamblairfundscom_6_MarketIndexPerformanceData"/>
			<link:roleRef roleURI="http://www.williamblairfunds.com/6/role/N1aCover" xlink:type="simple" xlink:href="#wwwwilliamblairfundscom_6_N1aCover"/>
			<link:roleRef roleURI="http://www.williamblairfunds.com/6/role/N1aSupplement" xlink:type="simple" xlink:href="#wwwwilliamblairfundscom_6_N1aSupplement"/>
			<link:roleRef roleURI="http://www.williamblairfunds.com/7/role/RiskReturn" xlink:type="simple" xlink:href="#wwwwilliamblairfundscom_7_RiskReturn"/>
			<link:roleRef roleURI="http://www.williamblairfunds.com/7/role/FeesAndExpenses" xlink:type="simple" xlink:href="#wwwwilliamblairfundscom_7_FeesAndExpenses"/>
			<link:roleRef roleURI="http://www.williamblairfunds.com/7/role/InvestmentStrategy" xlink:type="simple" xlink:href="#wwwwilliamblairfundscom_7_InvestmentStrategy"/>
			<link:roleRef roleURI="http://www.williamblairfunds.com/7/role/InvestmentRisks" xlink:type="simple" xlink:href="#wwwwilliamblairfundscom_7_InvestmentRisks"/>
			<link:roleRef roleURI="http://www.williamblairfunds.com/7/role/PerformanceManagement" xlink:type="simple" xlink:href="#wwwwilliamblairfundscom_7_PerformanceManagement"/>
			<link:roleRef roleURI="http://www.williamblairfunds.com/7/role/ShareholderFeesData" xlink:type="simple" xlink:href="#wwwwilliamblairfundscom_7_ShareholderFeesData"/>
			<link:roleRef roleURI="http://www.williamblairfunds.com/7/role/OperatingExpensesData" xlink:type="simple" xlink:href="#wwwwilliamblairfundscom_7_OperatingExpensesData"/>
			<link:roleRef roleURI="http://www.williamblairfunds.com/7/role/ExpenseExample" xlink:type="simple" xlink:href="#wwwwilliamblairfundscom_7_ExpenseExample"/>
			<link:roleRef roleURI="http://www.williamblairfunds.com/7/role/ExpenseExampleNoRedemption" xlink:type="simple" xlink:href="#wwwwilliamblairfundscom_7_ExpenseExampleNoRedemption"/>
			<link:roleRef roleURI="http://www.williamblairfunds.com/7/role/RiskTableData" xlink:type="simple" xlink:href="#wwwwilliamblairfundscom_7_RiskTableData"/>
			<link:roleRef roleURI="http://www.williamblairfunds.com/7/role/BarChartData" xlink:type="simple" xlink:href="#wwwwilliamblairfundscom_7_BarChartData"/>
			<link:roleRef roleURI="http://www.williamblairfunds.com/7/role/PerformanceTableData" xlink:type="simple" xlink:href="#wwwwilliamblairfundscom_7_PerformanceTableData"/>
			<link:roleRef roleURI="http://www.williamblairfunds.com/7/role/MarketIndexPerformanceData" xlink:type="simple" xlink:href="#wwwwilliamblairfundscom_7_MarketIndexPerformanceData"/>
			<link:roleRef roleURI="http://www.williamblairfunds.com/7/role/N1aCover" xlink:type="simple" xlink:href="#wwwwilliamblairfundscom_7_N1aCover"/>
			<link:roleRef roleURI="http://www.williamblairfunds.com/7/role/N1aSupplement" xlink:type="simple" xlink:href="#wwwwilliamblairfundscom_7_N1aSupplement"/>
			<link:roleRef roleURI="http://www.williamblairfunds.com/8/role/RiskReturn" xlink:type="simple" xlink:href="#wwwwilliamblairfundscom_8_RiskReturn"/>
			<link:roleRef roleURI="http://www.williamblairfunds.com/8/role/FeesAndExpenses" xlink:type="simple" xlink:href="#wwwwilliamblairfundscom_8_FeesAndExpenses"/>
			<link:roleRef roleURI="http://www.williamblairfunds.com/8/role/InvestmentStrategy" xlink:type="simple" xlink:href="#wwwwilliamblairfundscom_8_InvestmentStrategy"/>
			<link:roleRef roleURI="http://www.williamblairfunds.com/8/role/InvestmentRisks" xlink:type="simple" xlink:href="#wwwwilliamblairfundscom_8_InvestmentRisks"/>
			<link:roleRef roleURI="http://www.williamblairfunds.com/8/role/PerformanceManagement" xlink:type="simple" xlink:href="#wwwwilliamblairfundscom_8_PerformanceManagement"/>
			<link:roleRef roleURI="http://www.williamblairfunds.com/8/role/ShareholderFeesData" xlink:type="simple" xlink:href="#wwwwilliamblairfundscom_8_ShareholderFeesData"/>
			<link:roleRef roleURI="http://www.williamblairfunds.com/8/role/OperatingExpensesData" xlink:type="simple" xlink:href="#wwwwilliamblairfundscom_8_OperatingExpensesData"/>
			<link:roleRef roleURI="http://www.williamblairfunds.com/8/role/ExpenseExample" xlink:type="simple" xlink:href="#wwwwilliamblairfundscom_8_ExpenseExample"/>
			<link:roleRef roleURI="http://www.williamblairfunds.com/8/role/ExpenseExampleNoRedemption" xlink:type="simple" xlink:href="#wwwwilliamblairfundscom_8_ExpenseExampleNoRedemption"/>
			<link:roleRef roleURI="http://www.williamblairfunds.com/8/role/RiskTableData" xlink:type="simple" xlink:href="#wwwwilliamblairfundscom_8_RiskTableData"/>
			<link:roleRef roleURI="http://www.williamblairfunds.com/8/role/BarChartData" xlink:type="simple" xlink:href="#wwwwilliamblairfundscom_8_BarChartData"/>
			<link:roleRef roleURI="http://www.williamblairfunds.com/8/role/PerformanceTableData" xlink:type="simple" xlink:href="#wwwwilliamblairfundscom_8_PerformanceTableData"/>
			<link:roleRef roleURI="http://www.williamblairfunds.com/8/role/MarketIndexPerformanceData" xlink:type="simple" xlink:href="#wwwwilliamblairfundscom_8_MarketIndexPerformanceData"/>
			<link:roleRef roleURI="http://www.williamblairfunds.com/8/role/N1aCover" xlink:type="simple" xlink:href="#wwwwilliamblairfundscom_8_N1aCover"/>
			<link:roleRef roleURI="http://www.williamblairfunds.com/8/role/N1aSupplement" xlink:type="simple" xlink:href="#wwwwilliamblairfundscom_8_N1aSupplement"/>
			<link:roleRef roleURI="http://www.williamblairfunds.com/9/role/RiskReturn" xlink:type="simple" xlink:href="#wwwwilliamblairfundscom_9_RiskReturn"/>
			<link:roleRef roleURI="http://www.williamblairfunds.com/9/role/FeesAndExpenses" xlink:type="simple" xlink:href="#wwwwilliamblairfundscom_9_FeesAndExpenses"/>
			<link:roleRef roleURI="http://www.williamblairfunds.com/9/role/InvestmentStrategy" xlink:type="simple" xlink:href="#wwwwilliamblairfundscom_9_InvestmentStrategy"/>
			<link:roleRef roleURI="http://www.williamblairfunds.com/9/role/InvestmentRisks" xlink:type="simple" xlink:href="#wwwwilliamblairfundscom_9_InvestmentRisks"/>
			<link:roleRef roleURI="http://www.williamblairfunds.com/9/role/PerformanceManagement" xlink:type="simple" xlink:href="#wwwwilliamblairfundscom_9_PerformanceManagement"/>
			<link:roleRef roleURI="http://www.williamblairfunds.com/9/role/ShareholderFeesData" xlink:type="simple" xlink:href="#wwwwilliamblairfundscom_9_ShareholderFeesData"/>
			<link:roleRef roleURI="http://www.williamblairfunds.com/9/role/OperatingExpensesData" xlink:type="simple" xlink:href="#wwwwilliamblairfundscom_9_OperatingExpensesData"/>
			<link:roleRef roleURI="http://www.williamblairfunds.com/9/role/ExpenseExample" xlink:type="simple" xlink:href="#wwwwilliamblairfundscom_9_ExpenseExample"/>
			<link:roleRef roleURI="http://www.williamblairfunds.com/9/role/ExpenseExampleNoRedemption" xlink:type="simple" xlink:href="#wwwwilliamblairfundscom_9_ExpenseExampleNoRedemption"/>
			<link:roleRef roleURI="http://www.williamblairfunds.com/9/role/RiskTableData" xlink:type="simple" xlink:href="#wwwwilliamblairfundscom_9_RiskTableData"/>
			<link:roleRef roleURI="http://www.williamblairfunds.com/9/role/BarChartData" xlink:type="simple" xlink:href="#wwwwilliamblairfundscom_9_BarChartData"/>
			<link:roleRef roleURI="http://www.williamblairfunds.com/9/role/PerformanceTableData" xlink:type="simple" xlink:href="#wwwwilliamblairfundscom_9_PerformanceTableData"/>
			<link:roleRef roleURI="http://www.williamblairfunds.com/9/role/MarketIndexPerformanceData" xlink:type="simple" xlink:href="#wwwwilliamblairfundscom_9_MarketIndexPerformanceData"/>
			<link:roleRef roleURI="http://www.williamblairfunds.com/9/role/N1aCover" xlink:type="simple" xlink:href="#wwwwilliamblairfundscom_9_N1aCover"/>
			<link:roleRef roleURI="http://www.williamblairfunds.com/9/role/N1aSupplement" xlink:type="simple" xlink:href="#wwwwilliamblairfundscom_9_N1aSupplement"/>
			<link:roleRef roleURI="http://www.williamblairfunds.com/10/role/RiskReturn" xlink:type="simple" xlink:href="#wwwwilliamblairfundscom_10_RiskReturn"/>
			<link:roleRef roleURI="http://www.williamblairfunds.com/10/role/FeesAndExpenses" xlink:type="simple" xlink:href="#wwwwilliamblairfundscom_10_FeesAndExpenses"/>
			<link:roleRef roleURI="http://www.williamblairfunds.com/10/role/InvestmentStrategy" xlink:type="simple" xlink:href="#wwwwilliamblairfundscom_10_InvestmentStrategy"/>
			<link:roleRef roleURI="http://www.williamblairfunds.com/10/role/InvestmentRisks" xlink:type="simple" xlink:href="#wwwwilliamblairfundscom_10_InvestmentRisks"/>
			<link:roleRef roleURI="http://www.williamblairfunds.com/10/role/PerformanceManagement" xlink:type="simple" xlink:href="#wwwwilliamblairfundscom_10_PerformanceManagement"/>
			<link:roleRef roleURI="http://www.williamblairfunds.com/10/role/ShareholderFeesData" xlink:type="simple" xlink:href="#wwwwilliamblairfundscom_10_ShareholderFeesData"/>
			<link:roleRef roleURI="http://www.williamblairfunds.com/10/role/OperatingExpensesData" xlink:type="simple" xlink:href="#wwwwilliamblairfundscom_10_OperatingExpensesData"/>
			<link:roleRef roleURI="http://www.williamblairfunds.com/10/role/ExpenseExample" xlink:type="simple" xlink:href="#wwwwilliamblairfundscom_10_ExpenseExample"/>
			<link:roleRef roleURI="http://www.williamblairfunds.com/10/role/ExpenseExampleNoRedemption" xlink:type="simple" xlink:href="#wwwwilliamblairfundscom_10_ExpenseExampleNoRedemption"/>
			<link:roleRef roleURI="http://www.williamblairfunds.com/10/role/RiskTableData" xlink:type="simple" xlink:href="#wwwwilliamblairfundscom_10_RiskTableData"/>
			<link:roleRef roleURI="http://www.williamblairfunds.com/10/role/BarChartData" xlink:type="simple" xlink:href="#wwwwilliamblairfundscom_10_BarChartData"/>
			<link:roleRef roleURI="http://www.williamblairfunds.com/10/role/PerformanceTableData" xlink:type="simple" xlink:href="#wwwwilliamblairfundscom_10_PerformanceTableData"/>
			<link:roleRef roleURI="http://www.williamblairfunds.com/10/role/MarketIndexPerformanceData" xlink:type="simple" xlink:href="#wwwwilliamblairfundscom_10_MarketIndexPerformanceData"/>
			<link:roleRef roleURI="http://www.williamblairfunds.com/10/role/N1aCover" xlink:type="simple" xlink:href="#wwwwilliamblairfundscom_10_N1aCover"/>
			<link:roleRef roleURI="http://www.williamblairfunds.com/10/role/N1aSupplement" xlink:type="simple" xlink:href="#wwwwilliamblairfundscom_10_N1aSupplement"/>
			<link:roleRef roleURI="http://www.williamblairfunds.com/11/role/RiskReturn" xlink:type="simple" xlink:href="#wwwwilliamblairfundscom_11_RiskReturn"/>
			<link:roleRef roleURI="http://www.williamblairfunds.com/11/role/FeesAndExpenses" xlink:type="simple" xlink:href="#wwwwilliamblairfundscom_11_FeesAndExpenses"/>
			<link:roleRef roleURI="http://www.williamblairfunds.com/11/role/InvestmentStrategy" xlink:type="simple" xlink:href="#wwwwilliamblairfundscom_11_InvestmentStrategy"/>
			<link:roleRef roleURI="http://www.williamblairfunds.com/11/role/InvestmentRisks" xlink:type="simple" xlink:href="#wwwwilliamblairfundscom_11_InvestmentRisks"/>
			<link:roleRef roleURI="http://www.williamblairfunds.com/11/role/PerformanceManagement" xlink:type="simple" xlink:href="#wwwwilliamblairfundscom_11_PerformanceManagement"/>
			<link:roleRef roleURI="http://www.williamblairfunds.com/11/role/ShareholderFeesData" xlink:type="simple" xlink:href="#wwwwilliamblairfundscom_11_ShareholderFeesData"/>
			<link:roleRef roleURI="http://www.williamblairfunds.com/11/role/OperatingExpensesData" xlink:type="simple" xlink:href="#wwwwilliamblairfundscom_11_OperatingExpensesData"/>
			<link:roleRef roleURI="http://www.williamblairfunds.com/11/role/ExpenseExample" xlink:type="simple" xlink:href="#wwwwilliamblairfundscom_11_ExpenseExample"/>
			<link:roleRef roleURI="http://www.williamblairfunds.com/11/role/ExpenseExampleNoRedemption" xlink:type="simple" xlink:href="#wwwwilliamblairfundscom_11_ExpenseExampleNoRedemption"/>
			<link:roleRef roleURI="http://www.williamblairfunds.com/11/role/RiskTableData" xlink:type="simple" xlink:href="#wwwwilliamblairfundscom_11_RiskTableData"/>
			<link:roleRef roleURI="http://www.williamblairfunds.com/11/role/BarChartData" xlink:type="simple" xlink:href="#wwwwilliamblairfundscom_11_BarChartData"/>
			<link:roleRef roleURI="http://www.williamblairfunds.com/11/role/PerformanceTableData" xlink:type="simple" xlink:href="#wwwwilliamblairfundscom_11_PerformanceTableData"/>
			<link:roleRef roleURI="http://www.williamblairfunds.com/11/role/MarketIndexPerformanceData" xlink:type="simple" xlink:href="#wwwwilliamblairfundscom_11_MarketIndexPerformanceData"/>
			<link:roleRef roleURI="http://www.williamblairfunds.com/11/role/N1aCover" xlink:type="simple" xlink:href="#wwwwilliamblairfundscom_11_N1aCover"/>
			<link:roleRef roleURI="http://www.williamblairfunds.com/11/role/N1aSupplement" xlink:type="simple" xlink:href="#wwwwilliamblairfundscom_11_N1aSupplement"/>
			<link:roleRef roleURI="http://www.williamblairfunds.com/12/role/RiskReturn" xlink:type="simple" xlink:href="#wwwwilliamblairfundscom_12_RiskReturn"/>
			<link:roleRef roleURI="http://www.williamblairfunds.com/12/role/FeesAndExpenses" xlink:type="simple" xlink:href="#wwwwilliamblairfundscom_12_FeesAndExpenses"/>
			<link:roleRef roleURI="http://www.williamblairfunds.com/12/role/InvestmentStrategy" xlink:type="simple" xlink:href="#wwwwilliamblairfundscom_12_InvestmentStrategy"/>
			<link:roleRef roleURI="http://www.williamblairfunds.com/12/role/InvestmentRisks" xlink:type="simple" xlink:href="#wwwwilliamblairfundscom_12_InvestmentRisks"/>
			<link:roleRef roleURI="http://www.williamblairfunds.com/12/role/PerformanceManagement" xlink:type="simple" xlink:href="#wwwwilliamblairfundscom_12_PerformanceManagement"/>
			<link:roleRef roleURI="http://www.williamblairfunds.com/12/role/ShareholderFeesData" xlink:type="simple" xlink:href="#wwwwilliamblairfundscom_12_ShareholderFeesData"/>
			<link:roleRef roleURI="http://www.williamblairfunds.com/12/role/OperatingExpensesData" xlink:type="simple" xlink:href="#wwwwilliamblairfundscom_12_OperatingExpensesData"/>
			<link:roleRef roleURI="http://www.williamblairfunds.com/12/role/ExpenseExample" xlink:type="simple" xlink:href="#wwwwilliamblairfundscom_12_ExpenseExample"/>
			<link:roleRef roleURI="http://www.williamblairfunds.com/12/role/ExpenseExampleNoRedemption" xlink:type="simple" xlink:href="#wwwwilliamblairfundscom_12_ExpenseExampleNoRedemption"/>
			<link:roleRef roleURI="http://www.williamblairfunds.com/12/role/RiskTableData" xlink:type="simple" xlink:href="#wwwwilliamblairfundscom_12_RiskTableData"/>
			<link:roleRef roleURI="http://www.williamblairfunds.com/12/role/BarChartData" xlink:type="simple" xlink:href="#wwwwilliamblairfundscom_12_BarChartData"/>
			<link:roleRef roleURI="http://www.williamblairfunds.com/12/role/PerformanceTableData" xlink:type="simple" xlink:href="#wwwwilliamblairfundscom_12_PerformanceTableData"/>
			<link:roleRef roleURI="http://www.williamblairfunds.com/12/role/MarketIndexPerformanceData" xlink:type="simple" xlink:href="#wwwwilliamblairfundscom_12_MarketIndexPerformanceData"/>
			<link:roleRef roleURI="http://www.williamblairfunds.com/12/role/N1aCover" xlink:type="simple" xlink:href="#wwwwilliamblairfundscom_12_N1aCover"/>
			<link:roleRef roleURI="http://www.williamblairfunds.com/12/role/N1aSupplement" xlink:type="simple" xlink:href="#wwwwilliamblairfundscom_12_N1aSupplement"/>
			<link:roleRef roleURI="http://www.williamblairfunds.com/13/role/RiskReturn" xlink:type="simple" xlink:href="#wwwwilliamblairfundscom_13_RiskReturn"/>
			<link:roleRef roleURI="http://www.williamblairfunds.com/13/role/FeesAndExpenses" xlink:type="simple" xlink:href="#wwwwilliamblairfundscom_13_FeesAndExpenses"/>
			<link:roleRef roleURI="http://www.williamblairfunds.com/13/role/InvestmentStrategy" xlink:type="simple" xlink:href="#wwwwilliamblairfundscom_13_InvestmentStrategy"/>
			<link:roleRef roleURI="http://www.williamblairfunds.com/13/role/InvestmentRisks" xlink:type="simple" xlink:href="#wwwwilliamblairfundscom_13_InvestmentRisks"/>
			<link:roleRef roleURI="http://www.williamblairfunds.com/13/role/PerformanceManagement" xlink:type="simple" xlink:href="#wwwwilliamblairfundscom_13_PerformanceManagement"/>
			<link:roleRef roleURI="http://www.williamblairfunds.com/13/role/ShareholderFeesData" xlink:type="simple" xlink:href="#wwwwilliamblairfundscom_13_ShareholderFeesData"/>
			<link:roleRef roleURI="http://www.williamblairfunds.com/13/role/OperatingExpensesData" xlink:type="simple" xlink:href="#wwwwilliamblairfundscom_13_OperatingExpensesData"/>
			<link:roleRef roleURI="http://www.williamblairfunds.com/13/role/ExpenseExample" xlink:type="simple" xlink:href="#wwwwilliamblairfundscom_13_ExpenseExample"/>
			<link:roleRef roleURI="http://www.williamblairfunds.com/13/role/ExpenseExampleNoRedemption" xlink:type="simple" xlink:href="#wwwwilliamblairfundscom_13_ExpenseExampleNoRedemption"/>
			<link:roleRef roleURI="http://www.williamblairfunds.com/13/role/RiskTableData" xlink:type="simple" xlink:href="#wwwwilliamblairfundscom_13_RiskTableData"/>
			<link:roleRef roleURI="http://www.williamblairfunds.com/13/role/BarChartData" xlink:type="simple" xlink:href="#wwwwilliamblairfundscom_13_BarChartData"/>
			<link:roleRef roleURI="http://www.williamblairfunds.com/13/role/PerformanceTableData" xlink:type="simple" xlink:href="#wwwwilliamblairfundscom_13_PerformanceTableData"/>
			<link:roleRef roleURI="http://www.williamblairfunds.com/13/role/MarketIndexPerformanceData" xlink:type="simple" xlink:href="#wwwwilliamblairfundscom_13_MarketIndexPerformanceData"/>
			<link:roleRef roleURI="http://www.williamblairfunds.com/13/role/N1aCover" xlink:type="simple" xlink:href="#wwwwilliamblairfundscom_13_N1aCover"/>
			<link:roleRef roleURI="http://www.williamblairfunds.com/13/role/N1aSupplement" xlink:type="simple" xlink:href="#wwwwilliamblairfundscom_13_N1aSupplement"/>
			<link:roleRef roleURI="http://www.williamblairfunds.com/14/role/RiskReturn" xlink:type="simple" xlink:href="#wwwwilliamblairfundscom_14_RiskReturn"/>
			<link:roleRef roleURI="http://www.williamblairfunds.com/14/role/FeesAndExpenses" xlink:type="simple" xlink:href="#wwwwilliamblairfundscom_14_FeesAndExpenses"/>
			<link:roleRef roleURI="http://www.williamblairfunds.com/14/role/InvestmentStrategy" xlink:type="simple" xlink:href="#wwwwilliamblairfundscom_14_InvestmentStrategy"/>
			<link:roleRef roleURI="http://www.williamblairfunds.com/14/role/InvestmentRisks" xlink:type="simple" xlink:href="#wwwwilliamblairfundscom_14_InvestmentRisks"/>
			<link:roleRef roleURI="http://www.williamblairfunds.com/14/role/PerformanceManagement" xlink:type="simple" xlink:href="#wwwwilliamblairfundscom_14_PerformanceManagement"/>
			<link:roleRef roleURI="http://www.williamblairfunds.com/14/role/ShareholderFeesData" xlink:type="simple" xlink:href="#wwwwilliamblairfundscom_14_ShareholderFeesData"/>
			<link:roleRef roleURI="http://www.williamblairfunds.com/14/role/OperatingExpensesData" xlink:type="simple" xlink:href="#wwwwilliamblairfundscom_14_OperatingExpensesData"/>
			<link:roleRef roleURI="http://www.williamblairfunds.com/14/role/ExpenseExample" xlink:type="simple" xlink:href="#wwwwilliamblairfundscom_14_ExpenseExample"/>
			<link:roleRef roleURI="http://www.williamblairfunds.com/14/role/ExpenseExampleNoRedemption" xlink:type="simple" xlink:href="#wwwwilliamblairfundscom_14_ExpenseExampleNoRedemption"/>
			<link:roleRef roleURI="http://www.williamblairfunds.com/14/role/RiskTableData" xlink:type="simple" xlink:href="#wwwwilliamblairfundscom_14_RiskTableData"/>
			<link:roleRef roleURI="http://www.williamblairfunds.com/14/role/BarChartData" xlink:type="simple" xlink:href="#wwwwilliamblairfundscom_14_BarChartData"/>
			<link:roleRef roleURI="http://www.williamblairfunds.com/14/role/PerformanceTableData" xlink:type="simple" xlink:href="#wwwwilliamblairfundscom_14_PerformanceTableData"/>
			<link:roleRef roleURI="http://www.williamblairfunds.com/14/role/MarketIndexPerformanceData" xlink:type="simple" xlink:href="#wwwwilliamblairfundscom_14_MarketIndexPerformanceData"/>
			<link:roleRef roleURI="http://www.williamblairfunds.com/14/role/N1aCover" xlink:type="simple" xlink:href="#wwwwilliamblairfundscom_14_N1aCover"/>
			<link:roleRef roleURI="http://www.williamblairfunds.com/14/role/N1aSupplement" xlink:type="simple" xlink:href="#wwwwilliamblairfundscom_14_N1aSupplement"/>
			<link:roleRef roleURI="http://www.williamblairfunds.com/15/role/RiskReturn" xlink:type="simple" xlink:href="#wwwwilliamblairfundscom_15_RiskReturn"/>
			<link:roleRef roleURI="http://www.williamblairfunds.com/15/role/FeesAndExpenses" xlink:type="simple" xlink:href="#wwwwilliamblairfundscom_15_FeesAndExpenses"/>
			<link:roleRef roleURI="http://www.williamblairfunds.com/15/role/InvestmentStrategy" xlink:type="simple" xlink:href="#wwwwilliamblairfundscom_15_InvestmentStrategy"/>
			<link:roleRef roleURI="http://www.williamblairfunds.com/15/role/InvestmentRisks" xlink:type="simple" xlink:href="#wwwwilliamblairfundscom_15_InvestmentRisks"/>
			<link:roleRef roleURI="http://www.williamblairfunds.com/15/role/PerformanceManagement" xlink:type="simple" xlink:href="#wwwwilliamblairfundscom_15_PerformanceManagement"/>
			<link:roleRef roleURI="http://www.williamblairfunds.com/15/role/ShareholderFeesData" xlink:type="simple" xlink:href="#wwwwilliamblairfundscom_15_ShareholderFeesData"/>
			<link:roleRef roleURI="http://www.williamblairfunds.com/15/role/OperatingExpensesData" xlink:type="simple" xlink:href="#wwwwilliamblairfundscom_15_OperatingExpensesData"/>
			<link:roleRef roleURI="http://www.williamblairfunds.com/15/role/ExpenseExample" xlink:type="simple" xlink:href="#wwwwilliamblairfundscom_15_ExpenseExample"/>
			<link:roleRef roleURI="http://www.williamblairfunds.com/15/role/ExpenseExampleNoRedemption" xlink:type="simple" xlink:href="#wwwwilliamblairfundscom_15_ExpenseExampleNoRedemption"/>
			<link:roleRef roleURI="http://www.williamblairfunds.com/15/role/RiskTableData" xlink:type="simple" xlink:href="#wwwwilliamblairfundscom_15_RiskTableData"/>
			<link:roleRef roleURI="http://www.williamblairfunds.com/15/role/BarChartData" xlink:type="simple" xlink:href="#wwwwilliamblairfundscom_15_BarChartData"/>
			<link:roleRef roleURI="http://www.williamblairfunds.com/15/role/PerformanceTableData" xlink:type="simple" xlink:href="#wwwwilliamblairfundscom_15_PerformanceTableData"/>
			<link:roleRef roleURI="http://www.williamblairfunds.com/15/role/MarketIndexPerformanceData" xlink:type="simple" xlink:href="#wwwwilliamblairfundscom_15_MarketIndexPerformanceData"/>
			<link:roleRef roleURI="http://www.williamblairfunds.com/15/role/N1aCover" xlink:type="simple" xlink:href="#wwwwilliamblairfundscom_15_N1aCover"/>
			<link:roleRef roleURI="http://www.williamblairfunds.com/15/role/N1aSupplement" xlink:type="simple" xlink:href="#wwwwilliamblairfundscom_15_N1aSupplement"/>
			<link:roleRef roleURI="http://www.williamblairfunds.com/16/role/RiskReturn" xlink:type="simple" xlink:href="#wwwwilliamblairfundscom_16_RiskReturn"/>
			<link:roleRef roleURI="http://www.williamblairfunds.com/16/role/FeesAndExpenses" xlink:type="simple" xlink:href="#wwwwilliamblairfundscom_16_FeesAndExpenses"/>
			<link:roleRef roleURI="http://www.williamblairfunds.com/16/role/InvestmentStrategy" xlink:type="simple" xlink:href="#wwwwilliamblairfundscom_16_InvestmentStrategy"/>
			<link:roleRef roleURI="http://www.williamblairfunds.com/16/role/InvestmentRisks" xlink:type="simple" xlink:href="#wwwwilliamblairfundscom_16_InvestmentRisks"/>
			<link:roleRef roleURI="http://www.williamblairfunds.com/16/role/PerformanceManagement" xlink:type="simple" xlink:href="#wwwwilliamblairfundscom_16_PerformanceManagement"/>
			<link:roleRef roleURI="http://www.williamblairfunds.com/16/role/ShareholderFeesData" xlink:type="simple" xlink:href="#wwwwilliamblairfundscom_16_ShareholderFeesData"/>
			<link:roleRef roleURI="http://www.williamblairfunds.com/16/role/OperatingExpensesData" xlink:type="simple" xlink:href="#wwwwilliamblairfundscom_16_OperatingExpensesData"/>
			<link:roleRef roleURI="http://www.williamblairfunds.com/16/role/ExpenseExample" xlink:type="simple" xlink:href="#wwwwilliamblairfundscom_16_ExpenseExample"/>
			<link:roleRef roleURI="http://www.williamblairfunds.com/16/role/ExpenseExampleNoRedemption" xlink:type="simple" xlink:href="#wwwwilliamblairfundscom_16_ExpenseExampleNoRedemption"/>
			<link:roleRef roleURI="http://www.williamblairfunds.com/16/role/RiskTableData" xlink:type="simple" xlink:href="#wwwwilliamblairfundscom_16_RiskTableData"/>
			<link:roleRef roleURI="http://www.williamblairfunds.com/16/role/BarChartData" xlink:type="simple" xlink:href="#wwwwilliamblairfundscom_16_BarChartData"/>
			<link:roleRef roleURI="http://www.williamblairfunds.com/16/role/PerformanceTableData" xlink:type="simple" xlink:href="#wwwwilliamblairfundscom_16_PerformanceTableData"/>
			<link:roleRef roleURI="http://www.williamblairfunds.com/16/role/MarketIndexPerformanceData" xlink:type="simple" xlink:href="#wwwwilliamblairfundscom_16_MarketIndexPerformanceData"/>
			<link:roleRef roleURI="http://www.williamblairfunds.com/16/role/N1aCover" xlink:type="simple" xlink:href="#wwwwilliamblairfundscom_16_N1aCover"/>
			<link:roleRef roleURI="http://www.williamblairfunds.com/16/role/N1aSupplement" xlink:type="simple" xlink:href="#wwwwilliamblairfundscom_16_N1aSupplement"/>
			<link:roleRef roleURI="http://www.williamblairfunds.com/17/role/RiskReturn" xlink:type="simple" xlink:href="#wwwwilliamblairfundscom_17_RiskReturn"/>
			<link:roleRef roleURI="http://www.williamblairfunds.com/17/role/FeesAndExpenses" xlink:type="simple" xlink:href="#wwwwilliamblairfundscom_17_FeesAndExpenses"/>
			<link:roleRef roleURI="http://www.williamblairfunds.com/17/role/InvestmentStrategy" xlink:type="simple" xlink:href="#wwwwilliamblairfundscom_17_InvestmentStrategy"/>
			<link:roleRef roleURI="http://www.williamblairfunds.com/17/role/InvestmentRisks" xlink:type="simple" xlink:href="#wwwwilliamblairfundscom_17_InvestmentRisks"/>
			<link:roleRef roleURI="http://www.williamblairfunds.com/17/role/PerformanceManagement" xlink:type="simple" xlink:href="#wwwwilliamblairfundscom_17_PerformanceManagement"/>
			<link:roleRef roleURI="http://www.williamblairfunds.com/17/role/ShareholderFeesData" xlink:type="simple" xlink:href="#wwwwilliamblairfundscom_17_ShareholderFeesData"/>
			<link:roleRef roleURI="http://www.williamblairfunds.com/17/role/OperatingExpensesData" xlink:type="simple" xlink:href="#wwwwilliamblairfundscom_17_OperatingExpensesData"/>
			<link:roleRef roleURI="http://www.williamblairfunds.com/17/role/ExpenseExample" xlink:type="simple" xlink:href="#wwwwilliamblairfundscom_17_ExpenseExample"/>
			<link:roleRef roleURI="http://www.williamblairfunds.com/17/role/ExpenseExampleNoRedemption" xlink:type="simple" xlink:href="#wwwwilliamblairfundscom_17_ExpenseExampleNoRedemption"/>
			<link:roleRef roleURI="http://www.williamblairfunds.com/17/role/RiskTableData" xlink:type="simple" xlink:href="#wwwwilliamblairfundscom_17_RiskTableData"/>
			<link:roleRef roleURI="http://www.williamblairfunds.com/17/role/BarChartData" xlink:type="simple" xlink:href="#wwwwilliamblairfundscom_17_BarChartData"/>
			<link:roleRef roleURI="http://www.williamblairfunds.com/17/role/PerformanceTableData" xlink:type="simple" xlink:href="#wwwwilliamblairfundscom_17_PerformanceTableData"/>
			<link:roleRef roleURI="http://www.williamblairfunds.com/17/role/MarketIndexPerformanceData" xlink:type="simple" xlink:href="#wwwwilliamblairfundscom_17_MarketIndexPerformanceData"/>
			<link:roleRef roleURI="http://www.williamblairfunds.com/17/role/N1aCover" xlink:type="simple" xlink:href="#wwwwilliamblairfundscom_17_N1aCover"/>
			<link:roleRef roleURI="http://www.williamblairfunds.com/17/role/N1aSupplement" xlink:type="simple" xlink:href="#wwwwilliamblairfundscom_17_N1aSupplement"/>
			<link:roleRef roleURI="http://www.williamblairfunds.com/18/role/RiskReturn" xlink:type="simple" xlink:href="#wwwwilliamblairfundscom_18_RiskReturn"/>
			<link:roleRef roleURI="http://www.williamblairfunds.com/18/role/FeesAndExpenses" xlink:type="simple" xlink:href="#wwwwilliamblairfundscom_18_FeesAndExpenses"/>
			<link:roleRef roleURI="http://www.williamblairfunds.com/18/role/InvestmentStrategy" xlink:type="simple" xlink:href="#wwwwilliamblairfundscom_18_InvestmentStrategy"/>
			<link:roleRef roleURI="http://www.williamblairfunds.com/18/role/InvestmentRisks" xlink:type="simple" xlink:href="#wwwwilliamblairfundscom_18_InvestmentRisks"/>
			<link:roleRef roleURI="http://www.williamblairfunds.com/18/role/PerformanceManagement" xlink:type="simple" xlink:href="#wwwwilliamblairfundscom_18_PerformanceManagement"/>
			<link:roleRef roleURI="http://www.williamblairfunds.com/18/role/ShareholderFeesData" xlink:type="simple" xlink:href="#wwwwilliamblairfundscom_18_ShareholderFeesData"/>
			<link:roleRef roleURI="http://www.williamblairfunds.com/18/role/OperatingExpensesData" xlink:type="simple" xlink:href="#wwwwilliamblairfundscom_18_OperatingExpensesData"/>
			<link:roleRef roleURI="http://www.williamblairfunds.com/18/role/ExpenseExample" xlink:type="simple" xlink:href="#wwwwilliamblairfundscom_18_ExpenseExample"/>
			<link:roleRef roleURI="http://www.williamblairfunds.com/18/role/ExpenseExampleNoRedemption" xlink:type="simple" xlink:href="#wwwwilliamblairfundscom_18_ExpenseExampleNoRedemption"/>
			<link:roleRef roleURI="http://www.williamblairfunds.com/18/role/RiskTableData" xlink:type="simple" xlink:href="#wwwwilliamblairfundscom_18_RiskTableData"/>
			<link:roleRef roleURI="http://www.williamblairfunds.com/18/role/BarChartData" xlink:type="simple" xlink:href="#wwwwilliamblairfundscom_18_BarChartData"/>
			<link:roleRef roleURI="http://www.williamblairfunds.com/18/role/PerformanceTableData" xlink:type="simple" xlink:href="#wwwwilliamblairfundscom_18_PerformanceTableData"/>
			<link:roleRef roleURI="http://www.williamblairfunds.com/18/role/MarketIndexPerformanceData" xlink:type="simple" xlink:href="#wwwwilliamblairfundscom_18_MarketIndexPerformanceData"/>
			<link:roleRef roleURI="http://www.williamblairfunds.com/18/role/N1aCover" xlink:type="simple" xlink:href="#wwwwilliamblairfundscom_18_N1aCover"/>
			<link:roleRef roleURI="http://www.williamblairfunds.com/18/role/N1aSupplement" xlink:type="simple" xlink:href="#wwwwilliamblairfundscom_18_N1aSupplement"/>
			<link:roleRef roleURI="http://www.williamblairfunds.com/19/role/RiskReturn" xlink:type="simple" xlink:href="#wwwwilliamblairfundscom_19_RiskReturn"/>
			<link:roleRef roleURI="http://www.williamblairfunds.com/19/role/FeesAndExpenses" xlink:type="simple" xlink:href="#wwwwilliamblairfundscom_19_FeesAndExpenses"/>
			<link:roleRef roleURI="http://www.williamblairfunds.com/19/role/InvestmentStrategy" xlink:type="simple" xlink:href="#wwwwilliamblairfundscom_19_InvestmentStrategy"/>
			<link:roleRef roleURI="http://www.williamblairfunds.com/19/role/InvestmentRisks" xlink:type="simple" xlink:href="#wwwwilliamblairfundscom_19_InvestmentRisks"/>
			<link:roleRef roleURI="http://www.williamblairfunds.com/19/role/PerformanceManagement" xlink:type="simple" xlink:href="#wwwwilliamblairfundscom_19_PerformanceManagement"/>
			<link:roleRef roleURI="http://www.williamblairfunds.com/19/role/ShareholderFeesData" xlink:type="simple" xlink:href="#wwwwilliamblairfundscom_19_ShareholderFeesData"/>
			<link:roleRef roleURI="http://www.williamblairfunds.com/19/role/OperatingExpensesData" xlink:type="simple" xlink:href="#wwwwilliamblairfundscom_19_OperatingExpensesData"/>
			<link:roleRef roleURI="http://www.williamblairfunds.com/19/role/ExpenseExample" xlink:type="simple" xlink:href="#wwwwilliamblairfundscom_19_ExpenseExample"/>
			<link:roleRef roleURI="http://www.williamblairfunds.com/19/role/ExpenseExampleNoRedemption" xlink:type="simple" xlink:href="#wwwwilliamblairfundscom_19_ExpenseExampleNoRedemption"/>
			<link:roleRef roleURI="http://www.williamblairfunds.com/19/role/RiskTableData" xlink:type="simple" xlink:href="#wwwwilliamblairfundscom_19_RiskTableData"/>
			<link:roleRef roleURI="http://www.williamblairfunds.com/19/role/BarChartData" xlink:type="simple" xlink:href="#wwwwilliamblairfundscom_19_BarChartData"/>
			<link:roleRef roleURI="http://www.williamblairfunds.com/19/role/PerformanceTableData" xlink:type="simple" xlink:href="#wwwwilliamblairfundscom_19_PerformanceTableData"/>
			<link:roleRef roleURI="http://www.williamblairfunds.com/19/role/MarketIndexPerformanceData" xlink:type="simple" xlink:href="#wwwwilliamblairfundscom_19_MarketIndexPerformanceData"/>
			<link:roleRef roleURI="http://www.williamblairfunds.com/19/role/N1aCover" xlink:type="simple" xlink:href="#wwwwilliamblairfundscom_19_N1aCover"/>
			<link:roleRef roleURI="http://www.williamblairfunds.com/19/role/N1aSupplement" xlink:type="simple" xlink:href="#wwwwilliamblairfundscom_19_N1aSupplement"/>

            <link:roleRef roleURI="http://xbrl.sec.gov/rr/role/InvestmentStrategy" xlink:type="simple" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#InvestmentStrategy"/>	
            <!--PresentationLink Static Start-->
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/1/role/RiskReturn" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:link="http://www.xbrl.org/2003/linkbase">
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_FormN1aAbstract" xlink:label="FormN1aAbstract" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusTable" xlink:label="ProspectusTable" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="FormN1aAbstract" xlink:to="ProspectusTable" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="DocumentInformationDocumentAxis" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentDomain" xlink:label="DocumentDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="DocumentInformationDocumentAxis" xlink:to="DocumentDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="CoregistrantAxis" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AllCoregistrantsMember" xlink:label="AllCoregistrantsMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="CoregistrantAxis" xlink:to="AllCoregistrantsMember" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="LegalEntityAxis" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityDomain" xlink:label="EntityDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="EntityDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusLineItems" xlink:label="ProspectusLineItems" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ProspectusLineItems" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_RiskReturnHeading" xlink:label="RiskReturnHeading" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="RiskReturnHeading" use="optional" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ObjectiveHeading" xlink:label="ObjectiveHeading" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ObjectiveHeading" use="optional" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ObjectivePrimaryTextBlock" xlink:label="ObjectivePrimaryTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ObjectivePrimaryTextBlock" use="optional" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ObjectiveSecondaryTextBlock" xlink:label="ObjectiveSecondaryTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ObjectiveSecondaryTextBlock" use="optional" order="4.0" priority="1" />
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/1/role/ShareholderFeesData" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:link="http://www.xbrl.org/2003/linkbase">
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusTable" xlink:label="ProspectusTable" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="DocumentInformationDocumentAxis" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentDomain" xlink:label="DocumentDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="DocumentInformationDocumentAxis" xlink:to="DocumentDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="CoregistrantAxis" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AllCoregistrantsMember" xlink:label="AllCoregistrantsMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="CoregistrantAxis" xlink:to="AllCoregistrantsMember" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="LegalEntityAxis" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityDomain" xlink:label="EntityDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="EntityDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusLineItems" xlink:label="ProspectusLineItems" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ProspectusLineItems" order="5.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ShareholderFeesColumnName" xlink:label="ShareholderFeesColumnName" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ShareholderFeesColumnName" use="optional" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_MaximumCumulativeSalesChargeOverOfferingPrice" xlink:label="MaximumCumulativeSalesChargeOverOfferingPrice" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="MaximumCumulativeSalesChargeOverOfferingPrice" use="optional" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_MaximumCumulativeSalesChargeOverOther" xlink:label="MaximumCumulativeSalesChargeOverOther" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="MaximumCumulativeSalesChargeOverOther" use="optional" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice" xlink:label="MaximumSalesChargeImposedOnPurchasesOverOfferingPrice" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="MaximumSalesChargeImposedOnPurchasesOverOfferingPrice" use="optional" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_MaximumDeferredSalesChargeOverOfferingPrice" xlink:label="MaximumDeferredSalesChargeOverOfferingPrice" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="MaximumDeferredSalesChargeOverOfferingPrice" use="optional" order="5.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_MaximumDeferredSalesChargeOverOther" xlink:label="MaximumDeferredSalesChargeOverOther" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="MaximumDeferredSalesChargeOverOther" use="optional" order="6.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther" xlink:label="MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther" use="optional" order="7.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_RedemptionFeeOverRedemption" xlink:label="RedemptionFeeOverRedemption" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="RedemptionFeeOverRedemption" use="optional" order="8.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_RedemptionFee" xlink:label="RedemptionFee" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="RedemptionFee" use="optional" order="9.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExchangeFeeOverRedemption" xlink:label="ExchangeFeeOverRedemption" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExchangeFeeOverRedemption" use="optional" order="10.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExchangeFee" xlink:label="ExchangeFee" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExchangeFee" use="optional" order="11.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_MaximumAccountFeeOverAssets" xlink:label="MaximumAccountFeeOverAssets" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="MaximumAccountFeeOverAssets" use="optional" order="12.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_MaximumAccountFee" xlink:label="MaximumAccountFee" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="MaximumAccountFee" use="optional" order="13.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ShareholderFeeOther" xlink:label="ShareholderFeeOther" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ShareholderFeeOther" use="optional" order="14.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ClassAxis" xlink:label="ClassAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ClassAxis" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ShareClassDomain" xlink:label="ShareClassDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="ShareClassDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ShareholderFeesAbstract" xlink:label="ShareholderFeesAbstract" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ShareholderFeesAbstract" xlink:to="ProspectusTable" order="1.0" priority="1" />
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/1/role/OperatingExpensesData" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:link="http://www.xbrl.org/2003/linkbase">
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_FormN1aAbstract" xlink:label="FormN1aAbstract" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusTable" xlink:label="ProspectusTable" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="FormN1aAbstract" xlink:to="ProspectusTable" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="DocumentInformationDocumentAxis" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentDomain" xlink:label="DocumentDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="DocumentInformationDocumentAxis" xlink:to="DocumentDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="CoregistrantAxis" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AllCoregistrantsMember" xlink:label="AllCoregistrantsMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="CoregistrantAxis" xlink:to="AllCoregistrantsMember" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="LegalEntityAxis" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityDomain" xlink:label="EntityDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="EntityDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusLineItems" xlink:label="ProspectusLineItems" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ProspectusLineItems" order="5.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_OperatingExpensesColumnName" xlink:label="OperatingExpensesColumnName" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="OperatingExpensesColumnName" use="optional" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ManagementFeesOverAssets" xlink:label="ManagementFeesOverAssets" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ManagementFeesOverAssets" use="optional" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_DistributionAndService12b1FeesOverAssets" xlink:label="DistributionAndService12b1FeesOverAssets" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="DistributionAndService12b1FeesOverAssets" use="optional" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_DistributionOrSimilarNon12b1FeesOverAssets" xlink:label="DistributionOrSimilarNon12b1FeesOverAssets" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="DistributionOrSimilarNon12b1FeesOverAssets" use="optional" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_Component1OtherExpensesOverAssets" xlink:label="Component1OtherExpensesOverAssets" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="Component1OtherExpensesOverAssets" use="optional" order="5.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_Component2OtherExpensesOverAssets" xlink:label="Component2OtherExpensesOverAssets" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="Component2OtherExpensesOverAssets" use="optional" order="6.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_Component3OtherExpensesOverAssets" xlink:label="Component3OtherExpensesOverAssets" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="Component3OtherExpensesOverAssets" use="optional" order="7.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_OtherExpensesOverAssets" xlink:label="OtherExpensesOverAssets" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="OtherExpensesOverAssets" use="optional" order="8.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AcquiredFundFeesAndExpensesOverAssets" xlink:label="AcquiredFundFeesAndExpensesOverAssets" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="AcquiredFundFeesAndExpensesOverAssets" use="optional" order="9.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpensesOverAssets" xlink:label="ExpensesOverAssets" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpensesOverAssets" use="optional" order="10.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_FeeWaiverOrReimbursementOverAssets" xlink:label="FeeWaiverOrReimbursementOverAssets" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="FeeWaiverOrReimbursementOverAssets" use="optional" order="11.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_NetExpensesOverAssets" xlink:label="NetExpensesOverAssets" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="NetExpensesOverAssets" use="optional" order="12.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_FeeWaiverOrReimbursementOverAssetsDateOfTermination" xlink:label="FeeWaiverOrReimbursementOverAssetsDateOfTermination" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="FeeWaiverOrReimbursementOverAssetsDateOfTermination" order="13.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ClassAxis" xlink:label="ClassAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ClassAxis" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ShareClassDomain" xlink:label="ShareClassDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="ShareClassDomain" order="1.0" priority="1" />
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/1/role/ExpenseExample" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:link="http://www.xbrl.org/2003/linkbase">
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusTable" xlink:label="ProspectusTable" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="DocumentInformationDocumentAxis" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentDomain" xlink:label="DocumentDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="DocumentInformationDocumentAxis" xlink:to="DocumentDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="CoregistrantAxis" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AllCoregistrantsMember" xlink:label="AllCoregistrantsMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="CoregistrantAxis" xlink:to="AllCoregistrantsMember" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="LegalEntityAxis" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityDomain" xlink:label="EntityDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="EntityDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusLineItems" xlink:label="ProspectusLineItems" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ProspectusLineItems" order="5.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleByYearColumnName" xlink:label="ExpenseExampleByYearColumnName" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleByYearColumnName" use="optional" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleYear01" xlink:label="ExpenseExampleYear01" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleYear01" use="optional" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleYear03" xlink:label="ExpenseExampleYear03" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleYear03" use="optional" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleYear05" xlink:label="ExpenseExampleYear05" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleYear05" use="optional" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleYear10" xlink:label="ExpenseExampleYear10" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleYear10" use="optional" order="5.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ClassAxis" xlink:label="ClassAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ClassAxis" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ShareClassDomain" xlink:label="ShareClassDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="ShareClassDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleAbstract" xlink:label="ExpenseExampleAbstract" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ExpenseExampleAbstract" xlink:to="ProspectusTable" order="1.0" priority="1" />
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/1/role/ExpenseExampleNoRedemption" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:link="http://www.xbrl.org/2003/linkbase">
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusTable" xlink:label="ProspectusTable" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="DocumentInformationDocumentAxis" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentDomain" xlink:label="DocumentDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="DocumentInformationDocumentAxis" xlink:to="DocumentDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="CoregistrantAxis" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AllCoregistrantsMember" xlink:label="AllCoregistrantsMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="CoregistrantAxis" xlink:to="AllCoregistrantsMember" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="LegalEntityAxis" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityDomain" xlink:label="EntityDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="EntityDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusLineItems" xlink:label="ProspectusLineItems" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ProspectusLineItems" order="5.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleNoRedemptionByYearColumnName" xlink:label="ExpenseExampleNoRedemptionByYearColumnName" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleNoRedemptionByYearColumnName" use="optional" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleNoRedemptionYear01" xlink:label="ExpenseExampleNoRedemptionYear01" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleNoRedemptionYear01" use="optional" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleNoRedemptionYear03" xlink:label="ExpenseExampleNoRedemptionYear03" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleNoRedemptionYear03" use="optional" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleNoRedemptionYear05" xlink:label="ExpenseExampleNoRedemptionYear05" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleNoRedemptionYear05" use="optional" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleNoRedemptionYear10" xlink:label="ExpenseExampleNoRedemptionYear10" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleNoRedemptionYear10" use="optional" order="5.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ClassAxis" xlink:label="ClassAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ClassAxis" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ShareClassDomain" xlink:label="ShareClassDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="ShareClassDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleNoRedemptionAbstract" xlink:label="ExpenseExampleNoRedemptionAbstract" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ExpenseExampleNoRedemptionAbstract" xlink:to="ProspectusTable" order="1.0" priority="1" />
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/1/role/BarChartData" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:link="http://www.xbrl.org/2003/linkbase">
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusTable" xlink:label="ProspectusTable" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="DocumentInformationDocumentAxis" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentDomain" xlink:label="DocumentDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="DocumentInformationDocumentAxis" xlink:to="DocumentDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="CoregistrantAxis" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AllCoregistrantsMember" xlink:label="AllCoregistrantsMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="CoregistrantAxis" xlink:to="AllCoregistrantsMember" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="LegalEntityAxis" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityDomain" xlink:label="EntityDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="EntityDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusLineItems" xlink:label="ProspectusLineItems" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ProspectusLineItems" order="5.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AnnualReturnCaption" xlink:label="AnnualReturnCaption" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="AnnualReturnCaption" use="optional" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AnnualReturnColumnName" xlink:label="AnnualReturnColumnName" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="AnnualReturnColumnName" use="optional" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AnnualReturnInceptionDate" xlink:label="AnnualReturnInceptionDate" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="AnnualReturnInceptionDate" use="optional" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AnnlRtrPct" xlink:label="AnnlRtrPct" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="AnnlRtrPct" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ClassAxis" xlink:label="ClassAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ClassAxis" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ShareClassDomain" xlink:label="ShareClassDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="ShareClassDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_BarChartTableAbstract" xlink:label="BarChartTableAbstract" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="BarChartTableAbstract" xlink:to="ProspectusTable" order="1.0" priority="1" />
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/1/role/PerformanceTableData" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:link="http://www.xbrl.org/2003/linkbase">
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusTable" xlink:label="ProspectusTable" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="DocumentInformationDocumentAxis" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentDomain" xlink:label="DocumentDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="DocumentInformationDocumentAxis" xlink:to="DocumentDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="CoregistrantAxis" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AllCoregistrantsMember" xlink:label="AllCoregistrantsMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="CoregistrantAxis" xlink:to="AllCoregistrantsMember" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusLineItems" xlink:label="ProspectusLineItems" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ProspectusLineItems" order="5.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AverageAnnualReturnLabel" xlink:label="AverageAnnualReturnLabel" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="AverageAnnualReturnLabel" use="optional" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AvgAnnlRtrPct" xlink:label="AvgAnnlRtrPct" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="AvgAnnlRtrPct" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerfInceptionDate" xlink:label="PerfInceptionDate" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerfInceptionDate" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ClassAxis" xlink:label="ClassAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ClassAxis" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ShareClassDomain" xlink:label="ShareClassDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="ShareClassDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceMeasureAxis" xlink:label="PerformanceMeasureAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="PerformanceMeasureAxis" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceMeasureDomain" xlink:label="PerformanceMeasureDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="PerformanceMeasureAxis" xlink:to="PerformanceMeasureDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AfterTaxesOnDistributionsMember" xlink:label="AfterTaxesOnDistributionsMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="PerformanceMeasureDomain" xlink:to="AfterTaxesOnDistributionsMember" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AfterTaxesOnDistributionsAndSalesMember" xlink:label="AfterTaxesOnDistributionsAndSalesMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="PerformanceMeasureDomain" xlink:to="AfterTaxesOnDistributionsAndSalesMember" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AverageAnnualReturnAbstract" xlink:label="AverageAnnualReturnAbstract" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="AverageAnnualReturnAbstract" xlink:to="ProspectusTable" order="1.0" priority="1" />
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/1/role/N1aCover" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:link="http://www.xbrl.org/2003/linkbase">
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_FormN1aAbstract" xlink:label="FormN1aAbstract" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusTable" xlink:label="ProspectusTable" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="FormN1aAbstract" xlink:to="ProspectusTable" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="DocumentInformationDocumentAxis" use="optional" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentDomain" xlink:label="DocumentDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="DocumentInformationDocumentAxis" xlink:to="DocumentDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="CoregistrantAxis" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AllCoregistrantsMember" xlink:label="AllCoregistrantsMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="CoregistrantAxis" xlink:to="AllCoregistrantsMember" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusLineItems" xlink:label="ProspectusLineItems" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ProspectusLineItems" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentType" xlink:label="DocumentType" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="DocumentType" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_AmendmentFlag" xlink:label="AmendmentFlag" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="AmendmentFlag" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_AmendmentDescription" xlink:label="AmendmentDescription" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="AmendmentDescription" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityRegistrantName" xlink:label="EntityRegistrantName" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="EntityRegistrantName" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityCentralIndexKey" xlink:label="EntityCentralIndexKey" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="EntityCentralIndexKey" order="5.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityInvCompanyType" xlink:label="EntityInvCompanyType" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="EntityInvCompanyType" order="6.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentPeriodEndDate" xlink:label="DocumentPeriodEndDate" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="DocumentPeriodEndDate" order="7.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusDate" xlink:label="ProspectusDate" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ProspectusDate" order="8.0" priority="1" />
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/1/role/PerformanceManagement" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:link="http://www.xbrl.org/2003/linkbase">
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_FormN1aAbstract" xlink:label="FormN1aAbstract" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusTable" xlink:label="ProspectusTable" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="FormN1aAbstract" xlink:to="ProspectusTable" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="DocumentInformationDocumentAxis" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentDomain" xlink:label="DocumentDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="DocumentInformationDocumentAxis" xlink:to="DocumentDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="CoregistrantAxis" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AllCoregistrantsMember" xlink:label="AllCoregistrantsMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="CoregistrantAxis" xlink:to="AllCoregistrantsMember" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="LegalEntityAxis" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityDomain" xlink:label="EntityDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="EntityDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusLineItems" xlink:label="ProspectusLineItems" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ProspectusLineItems" order="5.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_BarChartAndPerformanceTableHeading" xlink:label="BarChartAndPerformanceTableHeading" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="BarChartAndPerformanceTableHeading" use="optional" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceNarrativeTextBlock" xlink:label="PerformanceNarrativeTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformanceNarrativeTextBlock" use="optional" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_BarChartNarrativeTextBlock" xlink:label="BarChartNarrativeTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="BarChartNarrativeTextBlock" use="optional" order="7.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_BarChartHeading" xlink:label="BarChartHeading" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="BarChartHeading" use="optional" order="11.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_BarChartFootnotesTextBlock" xlink:label="BarChartFootnotesTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="BarChartFootnotesTextBlock" use="optional" order="13.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_BarChartClosingTextBlock" xlink:label="BarChartClosingTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="BarChartClosingTextBlock" use="optional" order="14.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceTableHeading" xlink:label="PerformanceTableHeading" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformanceTableHeading" use="optional" order="24.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceTableNarrativeTextBlock" xlink:label="PerformanceTableNarrativeTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformanceTableNarrativeTextBlock" use="optional" order="25.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceTableClosingTextBlock" xlink:label="PerformanceTableClosingTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformanceTableClosingTextBlock" use="optional" order="39.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_BarChartTableTextBlock" xlink:label="BarChartTableTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="BarChartTableTextBlock" use="optional" order="12.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceTableTextBlock" xlink:label="PerformanceTableTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformanceTableTextBlock" use="optional" order="31.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_MarketIndexPerformanceTableTextBlock" xlink:label="MarketIndexPerformanceTableTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="MarketIndexPerformanceTableTextBlock" use="optional" order="34.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_MoneyMarketSevenDayYieldCaption" xlink:label="MoneyMarketSevenDayYieldCaption" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="MoneyMarketSevenDayYieldCaption" order="40.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_MoneyMarketSevenDayYieldColumnName" xlink:label="MoneyMarketSevenDayYieldColumnName" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="MoneyMarketSevenDayYieldColumnName" order="41.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_MoneyMarketSevenDayYieldPhone" xlink:label="MoneyMarketSevenDayYieldPhone" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="MoneyMarketSevenDayYieldPhone" order="42.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_MoneyMarketSevenDayYield" xlink:label="MoneyMarketSevenDayYield" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="MoneyMarketSevenDayYield" order="43.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_MoneyMarketSevenDayTaxEquivalentYield" xlink:label="MoneyMarketSevenDayTaxEquivalentYield" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="MoneyMarketSevenDayTaxEquivalentYield" order="44.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ThirtyDayYieldCaption" xlink:label="ThirtyDayYieldCaption" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ThirtyDayYieldCaption" order="45.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ThirtyDayYieldColumnName" xlink:label="ThirtyDayYieldColumnName" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ThirtyDayYieldColumnName" order="46.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ThirtyDayYieldPhone" xlink:label="ThirtyDayYieldPhone" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ThirtyDayYieldPhone" order="47.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ThirtyDayYield" xlink:label="ThirtyDayYield" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ThirtyDayYield" order="48.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ThirtyDayTaxEquivalentYield" xlink:label="ThirtyDayTaxEquivalentYield" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ThirtyDayTaxEquivalentYield" order="49.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceAvailabilityWebSiteAddress" xlink:label="PerformanceAvailabilityWebSiteAddress" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformanceAvailabilityWebSiteAddress" order="50.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceAvailabilityPhone" xlink:label="PerformanceAvailabilityPhone" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformanceAvailabilityPhone" order="51.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceTableFootnotesTextBlock" xlink:label="PerformanceTableFootnotesTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformanceTableFootnotesTextBlock" use="optional" order="35.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceTableFootnotesReasonPerformanceInformationForClassDifferentFromImmediatelyPrecedingPeriod" xlink:label="PerformanceTableFootnotesReasonPerformanceInformationForClassDifferentFromImmediatelyPrecedingPeriod" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformanceTableFootnotesReasonPerformanceInformationForClassDifferentFromImmediatelyPrecedingPeriod" order="36.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceTableOneClassOfAfterTaxShown" xlink:label="PerformanceTableOneClassOfAfterTaxShown" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformanceTableOneClassOfAfterTaxShown" order="37.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_IndexNoDeductionForFeesExpensesTaxes" xlink:label="IndexNoDeductionForFeesExpensesTaxes" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="IndexNoDeductionForFeesExpensesTaxes" order="38.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AverageAnnualReturnCaption" xlink:label="AverageAnnualReturnCaption" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="AverageAnnualReturnCaption" order="32.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AverageAnnualReturnColumnName" xlink:label="AverageAnnualReturnColumnName" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="AverageAnnualReturnColumnName" order="33.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceTableDoesReflectSalesLoads" xlink:label="PerformanceTableDoesReflectSalesLoads" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformanceTableDoesReflectSalesLoads" order="26.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceTableMarketIndexChanged" xlink:label="PerformanceTableMarketIndexChanged" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformanceTableMarketIndexChanged" order="27.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceTableUsesHighestFederalRate" xlink:label="PerformanceTableUsesHighestFederalRate" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformanceTableUsesHighestFederalRate" order="28.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceTableNotRelevantToTaxDeferred" xlink:label="PerformanceTableNotRelevantToTaxDeferred" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformanceTableNotRelevantToTaxDeferred" order="29.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceTableExplanationAfterTaxHigher" xlink:label="PerformanceTableExplanationAfterTaxHigher" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformanceTableExplanationAfterTaxHigher" order="30.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_YearToDateReturnLabel" xlink:label="YearToDateReturnLabel" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="YearToDateReturnLabel" order="15.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_BarChartYearToDateReturn" xlink:label="BarChartYearToDateReturn" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="BarChartYearToDateReturn" order="16.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_BarChartYearToDateReturnDate" xlink:label="BarChartYearToDateReturnDate" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="BarChartYearToDateReturnDate" order="17.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_HighestQuarterlyReturnLabel" xlink:label="HighestQuarterlyReturnLabel" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="HighestQuarterlyReturnLabel" order="18.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_BarChartHighestQuarterlyReturn" xlink:label="BarChartHighestQuarterlyReturn" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="BarChartHighestQuarterlyReturn" order="19.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_BarChartHighestQuarterlyReturnDate" xlink:label="BarChartHighestQuarterlyReturnDate" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="BarChartHighestQuarterlyReturnDate" order="20.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_LowestQuarterlyReturnLabel" xlink:label="LowestQuarterlyReturnLabel" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="LowestQuarterlyReturnLabel" order="21.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_BarChartLowestQuarterlyReturn" xlink:label="BarChartLowestQuarterlyReturn" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="BarChartLowestQuarterlyReturn" order="22.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_BarChartLowestQuarterlyReturnDate" xlink:label="BarChartLowestQuarterlyReturnDate" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="BarChartLowestQuarterlyReturnDate" order="23.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_BarChartDoesNotReflectSalesLoads" xlink:label="BarChartDoesNotReflectSalesLoads" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="BarChartDoesNotReflectSalesLoads" order="8.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_BarChartReturnsForClassNotOfferedInProspectus" xlink:label="BarChartReturnsForClassNotOfferedInProspectus" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="BarChartReturnsForClassNotOfferedInProspectus" order="9.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_BarChartReasonSelectedClassDifferentFromImmediatelyPrecedingPeriod" xlink:label="BarChartReasonSelectedClassDifferentFromImmediatelyPrecedingPeriod" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="BarChartReasonSelectedClassDifferentFromImmediatelyPrecedingPeriod" order="10.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformancePastDoesNotIndicateFuture" xlink:label="PerformancePastDoesNotIndicateFuture" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformancePastDoesNotIndicateFuture" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceInformationIllustratesVariabilityOfReturns" xlink:label="PerformanceInformationIllustratesVariabilityOfReturns" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformanceInformationIllustratesVariabilityOfReturns" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceOneYearOrLess" xlink:label="PerformanceOneYearOrLess" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformanceOneYearOrLess" order="5.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceAdditionalMarketIndex" xlink:label="PerformanceAdditionalMarketIndex" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformanceAdditionalMarketIndex" order="6.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ClassAxis" xlink:label="ClassAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ClassAxis" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ShareClassDomain" xlink:label="ShareClassDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="ShareClassDomain" order="1.0" priority="1" />
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/1/role/InvestmentRisks" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:link="http://www.xbrl.org/2003/linkbase">
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusTable" xlink:label="ProspectusTable" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="DocumentInformationDocumentAxis" use="optional" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentDomain" xlink:label="DocumentDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="DocumentInformationDocumentAxis" xlink:to="DocumentDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="CoregistrantAxis" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AllCoregistrantsMember" xlink:label="AllCoregistrantsMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="CoregistrantAxis" xlink:to="AllCoregistrantsMember" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="LegalEntityAxis" use="optional" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityDomain" xlink:label="EntityDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="EntityDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusLineItems" xlink:label="ProspectusLineItems" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ProspectusLineItems" order="5.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_RiskTextBlock" xlink:label="RiskTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="RiskTextBlock" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_RiskAxis" xlink:label="RiskAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="RiskAxis" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AllRisksMember" xlink:label="AllRisksMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="RiskAxis" xlink:to="AllRisksMember" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_RiskLoseMoneyMember" xlink:label="RiskLoseMoneyMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="RiskAxis" xlink:to="RiskLoseMoneyMember" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_RiskNotInsuredDepositoryInstitutionMember" xlink:label="RiskNotInsuredDepositoryInstitutionMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="RiskAxis" xlink:to="RiskNotInsuredDepositoryInstitutionMember" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_RiskNotInsuredMember" xlink:label="RiskNotInsuredMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="RiskAxis" xlink:to="RiskNotInsuredMember" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_RiskNondiversifiedStatusMember" xlink:label="RiskNondiversifiedStatusMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="RiskAxis" xlink:to="RiskNondiversifiedStatusMember" order="5.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_RiskMoneyMarketFundPriceFluctuatesMember" xlink:label="RiskMoneyMarketFundPriceFluctuatesMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="RiskAxis" xlink:to="RiskMoneyMarketFundPriceFluctuatesMember" order="6.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_RiskMoneyMarketFundMayImposeFeesOrSuspendSalesMember" xlink:label="RiskMoneyMarketFundMayImposeFeesOrSuspendSalesMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="RiskAxis" xlink:to="RiskMoneyMarketFundMayImposeFeesOrSuspendSalesMember" order="7.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_RiskMoneyMarketFundMayNotPreserveDollarMember" xlink:label="RiskMoneyMarketFundMayNotPreserveDollarMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="RiskAxis" xlink:to="RiskMoneyMarketFundMayNotPreserveDollarMember" order="8.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_RiskMoneyMarketFundSponsorMayNotProvideSupportMember" xlink:label="RiskMoneyMarketFundSponsorMayNotProvideSupportMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="RiskAxis" xlink:to="RiskMoneyMarketFundSponsorMayNotProvideSupportMember" order="9.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_RisksAbstract" xlink:label="RisksAbstract" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="RisksAbstract" xlink:to="ProspectusTable" use="optional" order="1.0" priority="1" />
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/1/role/InvestmentStrategy" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:link="http://www.xbrl.org/2003/linkbase">
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_FormN1aAbstract" xlink:label="FormN1aAbstract" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusTable" xlink:label="ProspectusTable" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="FormN1aAbstract" xlink:to="ProspectusTable" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="DocumentInformationDocumentAxis" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentDomain" xlink:label="DocumentDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="DocumentInformationDocumentAxis" xlink:to="DocumentDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="CoregistrantAxis" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AllCoregistrantsMember" xlink:label="AllCoregistrantsMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="CoregistrantAxis" xlink:to="AllCoregistrantsMember" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="LegalEntityAxis" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityDomain" xlink:label="EntityDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="EntityDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusLineItems" xlink:label="ProspectusLineItems" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ProspectusLineItems" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_StrategyHeading" xlink:label="StrategyHeading" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="StrategyHeading" use="optional" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_StrategyNarrativeTextBlock" xlink:label="StrategyNarrativeTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="StrategyNarrativeTextBlock" use="optional" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_StrategyPortfolioConcentration" xlink:label="StrategyPortfolioConcentration" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="StrategyPortfolioConcentration" order="3.0" priority="1" />
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/1/role/FeesAndExpenses" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:link="http://www.xbrl.org/2003/linkbase">
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_FormN1aAbstract" xlink:label="FormN1aAbstract" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusTable" xlink:label="ProspectusTable" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="FormN1aAbstract" xlink:to="ProspectusTable" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="DocumentInformationDocumentAxis" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentDomain" xlink:label="DocumentDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="DocumentInformationDocumentAxis" xlink:to="DocumentDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="CoregistrantAxis" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AllCoregistrantsMember" xlink:label="AllCoregistrantsMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="CoregistrantAxis" xlink:to="AllCoregistrantsMember" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="LegalEntityAxis" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityDomain" xlink:label="EntityDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="EntityDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusLineItems" xlink:label="ProspectusLineItems" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ProspectusLineItems" order="5.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseHeading" xlink:label="ExpenseHeading" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseHeading" use="optional" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseNarrativeTextBlock" xlink:label="ExpenseNarrativeTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseNarrativeTextBlock" use="optional" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ShareholderFeesCaption" xlink:label="ShareholderFeesCaption" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ShareholderFeesCaption" use="optional" order="11.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_OperatingExpensesCaption" xlink:label="OperatingExpensesCaption" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="OperatingExpensesCaption" use="optional" order="13.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseFootnotesTextBlock" xlink:label="ExpenseFootnotesTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseFootnotesTextBlock" use="optional" order="15.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpensesDeferredChargesTextBlock" xlink:label="ExpensesDeferredChargesTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpensesDeferredChargesTextBlock" use="optional" order="16.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpensesRangeOfExchangeFeesTextBlock" xlink:label="ExpensesRangeOfExchangeFeesTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpensesRangeOfExchangeFeesTextBlock" use="optional" order="17.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleHeading" xlink:label="ExpenseExampleHeading" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleHeading" use="optional" order="18.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleByYearHeading" xlink:label="ExpenseExampleByYearHeading" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleByYearHeading" use="optional" order="19.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleNarrativeTextBlock" xlink:label="ExpenseExampleNarrativeTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleNarrativeTextBlock" use="optional" order="20.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleByYearCaption" xlink:label="ExpenseExampleByYearCaption" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleByYearCaption" use="optional" order="21.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleNoRedemptionNarrativeTextBlock" xlink:label="ExpenseExampleNoRedemptionNarrativeTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleNoRedemptionNarrativeTextBlock" use="optional" order="23.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleNoRedemptionByYearCaption" xlink:label="ExpenseExampleNoRedemptionByYearCaption" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleNoRedemptionByYearCaption" use="optional" order="24.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleFootnotesTextBlock" xlink:label="ExpenseExampleFootnotesTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleFootnotesTextBlock" use="optional" order="26.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleClosingTextBlock" xlink:label="ExpenseExampleClosingTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleClosingTextBlock" use="optional" order="27.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PortfolioTurnoverHeading" xlink:label="PortfolioTurnoverHeading" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PortfolioTurnoverHeading" use="optional" order="28.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PortfolioTurnoverTextBlock" xlink:label="PortfolioTurnoverTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PortfolioTurnoverTextBlock" use="optional" order="29.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ShareholderFeesTableTextBlock" xlink:label="ShareholderFeesTableTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ShareholderFeesTableTextBlock" use="optional" order="12.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AnnualFundOperatingExpensesTableTextBlock" xlink:label="AnnualFundOperatingExpensesTableTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="AnnualFundOperatingExpensesTableTextBlock" use="optional" order="14.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleWithRedemptionTableTextBlock" xlink:label="ExpenseExampleWithRedemptionTableTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleWithRedemptionTableTextBlock" use="optional" order="22.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleNoRedemptionTableTextBlock" xlink:label="ExpenseExampleNoRedemptionTableTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleNoRedemptionTableTextBlock" use="optional" order="25.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PortfolioTurnoverRate" xlink:label="PortfolioTurnoverRate" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PortfolioTurnoverRate" order="30.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseBreakpointDiscounts" xlink:label="ExpenseBreakpointDiscounts" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseBreakpointDiscounts" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpensesOtherExpensesHadExtraordinaryExpensesBeenIncluded" xlink:label="ExpensesOtherExpensesHadExtraordinaryExpensesBeenIncluded" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpensesOtherExpensesHadExtraordinaryExpensesBeenIncluded" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpensesRestatedToReflectCurrent" xlink:label="ExpensesRestatedToReflectCurrent" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpensesRestatedToReflectCurrent" order="5.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseBreakpointMinimumInvestmentRequiredAmount" xlink:label="ExpenseBreakpointMinimumInvestmentRequiredAmount" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseBreakpointMinimumInvestmentRequiredAmount" order="6.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_OtherExpensesNewFundBasedOnEstimates" xlink:label="OtherExpensesNewFundBasedOnEstimates" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="OtherExpensesNewFundBasedOnEstimates" order="7.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AcquiredFundFeesAndExpensesBasedOnEstimates" xlink:label="AcquiredFundFeesAndExpensesBasedOnEstimates" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="AcquiredFundFeesAndExpensesBasedOnEstimates" order="8.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpensesNotCorrelatedToRatioDueToAcquiredFundFees" xlink:label="ExpensesNotCorrelatedToRatioDueToAcquiredFundFees" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpensesNotCorrelatedToRatioDueToAcquiredFundFees" order="9.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpensesExplanationOfNonrecurringAccountFee" xlink:label="ExpensesExplanationOfNonrecurringAccountFee" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpensesExplanationOfNonrecurringAccountFee" order="10.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ClassAxis" xlink:label="ClassAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ClassAxis" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ShareClassDomain" xlink:label="ShareClassDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="ShareClassDomain" order="1.0" priority="1" />
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/1/role/N1aSupplement" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:link="http://www.xbrl.org/2003/linkbase">
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_FormN1aAbstract" xlink:label="FormN1aAbstract" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusTable" xlink:label="ProspectusTable" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="FormN1aAbstract" xlink:to="ProspectusTable" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="DocumentInformationDocumentAxis" use="optional" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentDomain" xlink:label="DocumentDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="DocumentInformationDocumentAxis" xlink:to="DocumentDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="CoregistrantAxis" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AllCoregistrantsMember" xlink:label="AllCoregistrantsMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="CoregistrantAxis" xlink:to="AllCoregistrantsMember" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="LegalEntityAxis" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityDomain" xlink:label="EntityDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="EntityDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusLineItems" xlink:label="ProspectusLineItems" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ProspectusLineItems" order="5.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_SupplementToProspectusTextBlock" xlink:label="SupplementToProspectusTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="SupplementToProspectusTextBlock" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ClassAxis" xlink:label="ClassAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ClassAxis" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ShareClassDomain" xlink:label="ShareClassDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="ShareClassDomain" order="1.0" priority="1" />
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/2/role/RiskReturn" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:link="http://www.xbrl.org/2003/linkbase">
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_FormN1aAbstract" xlink:label="FormN1aAbstract" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusTable" xlink:label="ProspectusTable" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="FormN1aAbstract" xlink:to="ProspectusTable" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="DocumentInformationDocumentAxis" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentDomain" xlink:label="DocumentDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="DocumentInformationDocumentAxis" xlink:to="DocumentDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="CoregistrantAxis" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AllCoregistrantsMember" xlink:label="AllCoregistrantsMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="CoregistrantAxis" xlink:to="AllCoregistrantsMember" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="LegalEntityAxis" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityDomain" xlink:label="EntityDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="EntityDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusLineItems" xlink:label="ProspectusLineItems" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ProspectusLineItems" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_RiskReturnHeading" xlink:label="RiskReturnHeading" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="RiskReturnHeading" use="optional" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ObjectiveHeading" xlink:label="ObjectiveHeading" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ObjectiveHeading" use="optional" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ObjectivePrimaryTextBlock" xlink:label="ObjectivePrimaryTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ObjectivePrimaryTextBlock" use="optional" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ObjectiveSecondaryTextBlock" xlink:label="ObjectiveSecondaryTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ObjectiveSecondaryTextBlock" use="optional" order="4.0" priority="1" />
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/2/role/ShareholderFeesData" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:link="http://www.xbrl.org/2003/linkbase">
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusTable" xlink:label="ProspectusTable" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="DocumentInformationDocumentAxis" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentDomain" xlink:label="DocumentDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="DocumentInformationDocumentAxis" xlink:to="DocumentDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="CoregistrantAxis" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AllCoregistrantsMember" xlink:label="AllCoregistrantsMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="CoregistrantAxis" xlink:to="AllCoregistrantsMember" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="LegalEntityAxis" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityDomain" xlink:label="EntityDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="EntityDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusLineItems" xlink:label="ProspectusLineItems" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ProspectusLineItems" order="5.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ShareholderFeesColumnName" xlink:label="ShareholderFeesColumnName" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ShareholderFeesColumnName" use="optional" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_MaximumCumulativeSalesChargeOverOfferingPrice" xlink:label="MaximumCumulativeSalesChargeOverOfferingPrice" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="MaximumCumulativeSalesChargeOverOfferingPrice" use="optional" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_MaximumCumulativeSalesChargeOverOther" xlink:label="MaximumCumulativeSalesChargeOverOther" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="MaximumCumulativeSalesChargeOverOther" use="optional" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice" xlink:label="MaximumSalesChargeImposedOnPurchasesOverOfferingPrice" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="MaximumSalesChargeImposedOnPurchasesOverOfferingPrice" use="optional" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_MaximumDeferredSalesChargeOverOfferingPrice" xlink:label="MaximumDeferredSalesChargeOverOfferingPrice" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="MaximumDeferredSalesChargeOverOfferingPrice" use="optional" order="5.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_MaximumDeferredSalesChargeOverOther" xlink:label="MaximumDeferredSalesChargeOverOther" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="MaximumDeferredSalesChargeOverOther" use="optional" order="6.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther" xlink:label="MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther" use="optional" order="7.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_RedemptionFeeOverRedemption" xlink:label="RedemptionFeeOverRedemption" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="RedemptionFeeOverRedemption" use="optional" order="8.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_RedemptionFee" xlink:label="RedemptionFee" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="RedemptionFee" use="optional" order="9.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExchangeFeeOverRedemption" xlink:label="ExchangeFeeOverRedemption" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExchangeFeeOverRedemption" use="optional" order="10.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExchangeFee" xlink:label="ExchangeFee" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExchangeFee" use="optional" order="11.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_MaximumAccountFeeOverAssets" xlink:label="MaximumAccountFeeOverAssets" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="MaximumAccountFeeOverAssets" use="optional" order="12.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_MaximumAccountFee" xlink:label="MaximumAccountFee" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="MaximumAccountFee" use="optional" order="13.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ShareholderFeeOther" xlink:label="ShareholderFeeOther" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ShareholderFeeOther" use="optional" order="14.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ClassAxis" xlink:label="ClassAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ClassAxis" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ShareClassDomain" xlink:label="ShareClassDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="ShareClassDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ShareholderFeesAbstract" xlink:label="ShareholderFeesAbstract" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ShareholderFeesAbstract" xlink:to="ProspectusTable" order="1.0" priority="1" />
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/2/role/OperatingExpensesData" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:link="http://www.xbrl.org/2003/linkbase">
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_FormN1aAbstract" xlink:label="FormN1aAbstract" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusTable" xlink:label="ProspectusTable" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="FormN1aAbstract" xlink:to="ProspectusTable" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="DocumentInformationDocumentAxis" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentDomain" xlink:label="DocumentDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="DocumentInformationDocumentAxis" xlink:to="DocumentDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="CoregistrantAxis" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AllCoregistrantsMember" xlink:label="AllCoregistrantsMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="CoregistrantAxis" xlink:to="AllCoregistrantsMember" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="LegalEntityAxis" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityDomain" xlink:label="EntityDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="EntityDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusLineItems" xlink:label="ProspectusLineItems" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ProspectusLineItems" order="5.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_OperatingExpensesColumnName" xlink:label="OperatingExpensesColumnName" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="OperatingExpensesColumnName" use="optional" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ManagementFeesOverAssets" xlink:label="ManagementFeesOverAssets" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ManagementFeesOverAssets" use="optional" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_DistributionAndService12b1FeesOverAssets" xlink:label="DistributionAndService12b1FeesOverAssets" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="DistributionAndService12b1FeesOverAssets" use="optional" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_DistributionOrSimilarNon12b1FeesOverAssets" xlink:label="DistributionOrSimilarNon12b1FeesOverAssets" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="DistributionOrSimilarNon12b1FeesOverAssets" use="optional" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_Component1OtherExpensesOverAssets" xlink:label="Component1OtherExpensesOverAssets" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="Component1OtherExpensesOverAssets" use="optional" order="5.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_Component2OtherExpensesOverAssets" xlink:label="Component2OtherExpensesOverAssets" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="Component2OtherExpensesOverAssets" use="optional" order="6.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_Component3OtherExpensesOverAssets" xlink:label="Component3OtherExpensesOverAssets" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="Component3OtherExpensesOverAssets" use="optional" order="7.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_OtherExpensesOverAssets" xlink:label="OtherExpensesOverAssets" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="OtherExpensesOverAssets" use="optional" order="8.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AcquiredFundFeesAndExpensesOverAssets" xlink:label="AcquiredFundFeesAndExpensesOverAssets" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="AcquiredFundFeesAndExpensesOverAssets" use="optional" order="9.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpensesOverAssets" xlink:label="ExpensesOverAssets" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpensesOverAssets" use="optional" order="10.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_FeeWaiverOrReimbursementOverAssets" xlink:label="FeeWaiverOrReimbursementOverAssets" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="FeeWaiverOrReimbursementOverAssets" use="optional" order="11.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_NetExpensesOverAssets" xlink:label="NetExpensesOverAssets" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="NetExpensesOverAssets" use="optional" order="12.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_FeeWaiverOrReimbursementOverAssetsDateOfTermination" xlink:label="FeeWaiverOrReimbursementOverAssetsDateOfTermination" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="FeeWaiverOrReimbursementOverAssetsDateOfTermination" order="13.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ClassAxis" xlink:label="ClassAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ClassAxis" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ShareClassDomain" xlink:label="ShareClassDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="ShareClassDomain" order="1.0" priority="1" />
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/2/role/ExpenseExample" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:link="http://www.xbrl.org/2003/linkbase">
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusTable" xlink:label="ProspectusTable" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="DocumentInformationDocumentAxis" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentDomain" xlink:label="DocumentDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="DocumentInformationDocumentAxis" xlink:to="DocumentDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="CoregistrantAxis" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AllCoregistrantsMember" xlink:label="AllCoregistrantsMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="CoregistrantAxis" xlink:to="AllCoregistrantsMember" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="LegalEntityAxis" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityDomain" xlink:label="EntityDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="EntityDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusLineItems" xlink:label="ProspectusLineItems" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ProspectusLineItems" order="5.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleByYearColumnName" xlink:label="ExpenseExampleByYearColumnName" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleByYearColumnName" use="optional" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleYear01" xlink:label="ExpenseExampleYear01" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleYear01" use="optional" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleYear03" xlink:label="ExpenseExampleYear03" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleYear03" use="optional" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleYear05" xlink:label="ExpenseExampleYear05" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleYear05" use="optional" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleYear10" xlink:label="ExpenseExampleYear10" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleYear10" use="optional" order="5.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ClassAxis" xlink:label="ClassAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ClassAxis" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ShareClassDomain" xlink:label="ShareClassDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="ShareClassDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleAbstract" xlink:label="ExpenseExampleAbstract" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ExpenseExampleAbstract" xlink:to="ProspectusTable" order="1.0" priority="1" />
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/2/role/ExpenseExampleNoRedemption" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:link="http://www.xbrl.org/2003/linkbase">
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusTable" xlink:label="ProspectusTable" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="DocumentInformationDocumentAxis" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentDomain" xlink:label="DocumentDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="DocumentInformationDocumentAxis" xlink:to="DocumentDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="CoregistrantAxis" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AllCoregistrantsMember" xlink:label="AllCoregistrantsMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="CoregistrantAxis" xlink:to="AllCoregistrantsMember" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="LegalEntityAxis" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityDomain" xlink:label="EntityDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="EntityDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusLineItems" xlink:label="ProspectusLineItems" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ProspectusLineItems" order="5.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleNoRedemptionByYearColumnName" xlink:label="ExpenseExampleNoRedemptionByYearColumnName" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleNoRedemptionByYearColumnName" use="optional" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleNoRedemptionYear01" xlink:label="ExpenseExampleNoRedemptionYear01" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleNoRedemptionYear01" use="optional" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleNoRedemptionYear03" xlink:label="ExpenseExampleNoRedemptionYear03" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleNoRedemptionYear03" use="optional" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleNoRedemptionYear05" xlink:label="ExpenseExampleNoRedemptionYear05" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleNoRedemptionYear05" use="optional" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleNoRedemptionYear10" xlink:label="ExpenseExampleNoRedemptionYear10" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleNoRedemptionYear10" use="optional" order="5.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ClassAxis" xlink:label="ClassAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ClassAxis" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ShareClassDomain" xlink:label="ShareClassDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="ShareClassDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleNoRedemptionAbstract" xlink:label="ExpenseExampleNoRedemptionAbstract" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ExpenseExampleNoRedemptionAbstract" xlink:to="ProspectusTable" order="1.0" priority="1" />
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/2/role/BarChartData" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:link="http://www.xbrl.org/2003/linkbase">
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusTable" xlink:label="ProspectusTable" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="DocumentInformationDocumentAxis" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentDomain" xlink:label="DocumentDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="DocumentInformationDocumentAxis" xlink:to="DocumentDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="CoregistrantAxis" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AllCoregistrantsMember" xlink:label="AllCoregistrantsMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="CoregistrantAxis" xlink:to="AllCoregistrantsMember" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="LegalEntityAxis" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityDomain" xlink:label="EntityDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="EntityDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusLineItems" xlink:label="ProspectusLineItems" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ProspectusLineItems" order="5.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AnnualReturnCaption" xlink:label="AnnualReturnCaption" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="AnnualReturnCaption" use="optional" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AnnualReturnColumnName" xlink:label="AnnualReturnColumnName" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="AnnualReturnColumnName" use="optional" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AnnualReturnInceptionDate" xlink:label="AnnualReturnInceptionDate" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="AnnualReturnInceptionDate" use="optional" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AnnlRtrPct" xlink:label="AnnlRtrPct" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="AnnlRtrPct" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ClassAxis" xlink:label="ClassAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ClassAxis" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ShareClassDomain" xlink:label="ShareClassDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="ShareClassDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_BarChartTableAbstract" xlink:label="BarChartTableAbstract" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="BarChartTableAbstract" xlink:to="ProspectusTable" order="1.0" priority="1" />
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/2/role/PerformanceTableData" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:link="http://www.xbrl.org/2003/linkbase">
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusTable" xlink:label="ProspectusTable" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="DocumentInformationDocumentAxis" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentDomain" xlink:label="DocumentDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="DocumentInformationDocumentAxis" xlink:to="DocumentDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="CoregistrantAxis" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AllCoregistrantsMember" xlink:label="AllCoregistrantsMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="CoregistrantAxis" xlink:to="AllCoregistrantsMember" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusLineItems" xlink:label="ProspectusLineItems" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ProspectusLineItems" order="5.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AverageAnnualReturnLabel" xlink:label="AverageAnnualReturnLabel" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="AverageAnnualReturnLabel" use="optional" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AvgAnnlRtrPct" xlink:label="AvgAnnlRtrPct" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="AvgAnnlRtrPct" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerfInceptionDate" xlink:label="PerfInceptionDate" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerfInceptionDate" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ClassAxis" xlink:label="ClassAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ClassAxis" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ShareClassDomain" xlink:label="ShareClassDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="ShareClassDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceMeasureAxis" xlink:label="PerformanceMeasureAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="PerformanceMeasureAxis" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceMeasureDomain" xlink:label="PerformanceMeasureDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="PerformanceMeasureAxis" xlink:to="PerformanceMeasureDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AfterTaxesOnDistributionsMember" xlink:label="AfterTaxesOnDistributionsMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="PerformanceMeasureDomain" xlink:to="AfterTaxesOnDistributionsMember" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AfterTaxesOnDistributionsAndSalesMember" xlink:label="AfterTaxesOnDistributionsAndSalesMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="PerformanceMeasureDomain" xlink:to="AfterTaxesOnDistributionsAndSalesMember" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AverageAnnualReturnAbstract" xlink:label="AverageAnnualReturnAbstract" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="AverageAnnualReturnAbstract" xlink:to="ProspectusTable" order="1.0" priority="1" />
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/2/role/N1aCover" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:link="http://www.xbrl.org/2003/linkbase">
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_FormN1aAbstract" xlink:label="FormN1aAbstract" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusTable" xlink:label="ProspectusTable" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="FormN1aAbstract" xlink:to="ProspectusTable" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="DocumentInformationDocumentAxis" use="optional" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentDomain" xlink:label="DocumentDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="DocumentInformationDocumentAxis" xlink:to="DocumentDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="CoregistrantAxis" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AllCoregistrantsMember" xlink:label="AllCoregistrantsMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="CoregistrantAxis" xlink:to="AllCoregistrantsMember" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusLineItems" xlink:label="ProspectusLineItems" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ProspectusLineItems" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentType" xlink:label="DocumentType" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="DocumentType" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_AmendmentFlag" xlink:label="AmendmentFlag" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="AmendmentFlag" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_AmendmentDescription" xlink:label="AmendmentDescription" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="AmendmentDescription" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityRegistrantName" xlink:label="EntityRegistrantName" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="EntityRegistrantName" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityCentralIndexKey" xlink:label="EntityCentralIndexKey" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="EntityCentralIndexKey" order="5.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityInvCompanyType" xlink:label="EntityInvCompanyType" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="EntityInvCompanyType" order="6.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentPeriodEndDate" xlink:label="DocumentPeriodEndDate" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="DocumentPeriodEndDate" order="7.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusDate" xlink:label="ProspectusDate" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ProspectusDate" order="8.0" priority="1" />
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/2/role/PerformanceManagement" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:link="http://www.xbrl.org/2003/linkbase">
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_FormN1aAbstract" xlink:label="FormN1aAbstract" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusTable" xlink:label="ProspectusTable" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="FormN1aAbstract" xlink:to="ProspectusTable" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="DocumentInformationDocumentAxis" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentDomain" xlink:label="DocumentDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="DocumentInformationDocumentAxis" xlink:to="DocumentDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="CoregistrantAxis" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AllCoregistrantsMember" xlink:label="AllCoregistrantsMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="CoregistrantAxis" xlink:to="AllCoregistrantsMember" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="LegalEntityAxis" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityDomain" xlink:label="EntityDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="EntityDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusLineItems" xlink:label="ProspectusLineItems" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ProspectusLineItems" order="5.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_BarChartAndPerformanceTableHeading" xlink:label="BarChartAndPerformanceTableHeading" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="BarChartAndPerformanceTableHeading" use="optional" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceNarrativeTextBlock" xlink:label="PerformanceNarrativeTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformanceNarrativeTextBlock" use="optional" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_BarChartNarrativeTextBlock" xlink:label="BarChartNarrativeTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="BarChartNarrativeTextBlock" use="optional" order="7.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_BarChartHeading" xlink:label="BarChartHeading" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="BarChartHeading" use="optional" order="11.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_BarChartFootnotesTextBlock" xlink:label="BarChartFootnotesTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="BarChartFootnotesTextBlock" use="optional" order="13.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_BarChartClosingTextBlock" xlink:label="BarChartClosingTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="BarChartClosingTextBlock" use="optional" order="14.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceTableHeading" xlink:label="PerformanceTableHeading" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformanceTableHeading" use="optional" order="24.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceTableNarrativeTextBlock" xlink:label="PerformanceTableNarrativeTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformanceTableNarrativeTextBlock" use="optional" order="25.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceTableClosingTextBlock" xlink:label="PerformanceTableClosingTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformanceTableClosingTextBlock" use="optional" order="39.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_BarChartTableTextBlock" xlink:label="BarChartTableTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="BarChartTableTextBlock" use="optional" order="12.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceTableTextBlock" xlink:label="PerformanceTableTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformanceTableTextBlock" use="optional" order="31.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_MarketIndexPerformanceTableTextBlock" xlink:label="MarketIndexPerformanceTableTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="MarketIndexPerformanceTableTextBlock" use="optional" order="34.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_MoneyMarketSevenDayYieldCaption" xlink:label="MoneyMarketSevenDayYieldCaption" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="MoneyMarketSevenDayYieldCaption" order="40.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_MoneyMarketSevenDayYieldColumnName" xlink:label="MoneyMarketSevenDayYieldColumnName" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="MoneyMarketSevenDayYieldColumnName" order="41.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_MoneyMarketSevenDayYieldPhone" xlink:label="MoneyMarketSevenDayYieldPhone" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="MoneyMarketSevenDayYieldPhone" order="42.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_MoneyMarketSevenDayYield" xlink:label="MoneyMarketSevenDayYield" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="MoneyMarketSevenDayYield" order="43.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_MoneyMarketSevenDayTaxEquivalentYield" xlink:label="MoneyMarketSevenDayTaxEquivalentYield" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="MoneyMarketSevenDayTaxEquivalentYield" order="44.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ThirtyDayYieldCaption" xlink:label="ThirtyDayYieldCaption" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ThirtyDayYieldCaption" order="45.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ThirtyDayYieldColumnName" xlink:label="ThirtyDayYieldColumnName" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ThirtyDayYieldColumnName" order="46.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ThirtyDayYieldPhone" xlink:label="ThirtyDayYieldPhone" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ThirtyDayYieldPhone" order="47.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ThirtyDayYield" xlink:label="ThirtyDayYield" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ThirtyDayYield" order="48.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ThirtyDayTaxEquivalentYield" xlink:label="ThirtyDayTaxEquivalentYield" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ThirtyDayTaxEquivalentYield" order="49.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceAvailabilityWebSiteAddress" xlink:label="PerformanceAvailabilityWebSiteAddress" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformanceAvailabilityWebSiteAddress" order="50.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceAvailabilityPhone" xlink:label="PerformanceAvailabilityPhone" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformanceAvailabilityPhone" order="51.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceTableFootnotesTextBlock" xlink:label="PerformanceTableFootnotesTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformanceTableFootnotesTextBlock" use="optional" order="35.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceTableFootnotesReasonPerformanceInformationForClassDifferentFromImmediatelyPrecedingPeriod" xlink:label="PerformanceTableFootnotesReasonPerformanceInformationForClassDifferentFromImmediatelyPrecedingPeriod" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformanceTableFootnotesReasonPerformanceInformationForClassDifferentFromImmediatelyPrecedingPeriod" order="36.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceTableOneClassOfAfterTaxShown" xlink:label="PerformanceTableOneClassOfAfterTaxShown" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformanceTableOneClassOfAfterTaxShown" order="37.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_IndexNoDeductionForFeesExpensesTaxes" xlink:label="IndexNoDeductionForFeesExpensesTaxes" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="IndexNoDeductionForFeesExpensesTaxes" order="38.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AverageAnnualReturnCaption" xlink:label="AverageAnnualReturnCaption" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="AverageAnnualReturnCaption" order="32.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AverageAnnualReturnColumnName" xlink:label="AverageAnnualReturnColumnName" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="AverageAnnualReturnColumnName" order="33.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceTableDoesReflectSalesLoads" xlink:label="PerformanceTableDoesReflectSalesLoads" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformanceTableDoesReflectSalesLoads" order="26.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceTableMarketIndexChanged" xlink:label="PerformanceTableMarketIndexChanged" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformanceTableMarketIndexChanged" order="27.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceTableUsesHighestFederalRate" xlink:label="PerformanceTableUsesHighestFederalRate" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformanceTableUsesHighestFederalRate" order="28.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceTableNotRelevantToTaxDeferred" xlink:label="PerformanceTableNotRelevantToTaxDeferred" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformanceTableNotRelevantToTaxDeferred" order="29.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceTableExplanationAfterTaxHigher" xlink:label="PerformanceTableExplanationAfterTaxHigher" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformanceTableExplanationAfterTaxHigher" order="30.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_YearToDateReturnLabel" xlink:label="YearToDateReturnLabel" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="YearToDateReturnLabel" order="15.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_BarChartYearToDateReturn" xlink:label="BarChartYearToDateReturn" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="BarChartYearToDateReturn" order="16.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_BarChartYearToDateReturnDate" xlink:label="BarChartYearToDateReturnDate" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="BarChartYearToDateReturnDate" order="17.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_HighestQuarterlyReturnLabel" xlink:label="HighestQuarterlyReturnLabel" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="HighestQuarterlyReturnLabel" order="18.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_BarChartHighestQuarterlyReturn" xlink:label="BarChartHighestQuarterlyReturn" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="BarChartHighestQuarterlyReturn" order="19.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_BarChartHighestQuarterlyReturnDate" xlink:label="BarChartHighestQuarterlyReturnDate" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="BarChartHighestQuarterlyReturnDate" order="20.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_LowestQuarterlyReturnLabel" xlink:label="LowestQuarterlyReturnLabel" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="LowestQuarterlyReturnLabel" order="21.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_BarChartLowestQuarterlyReturn" xlink:label="BarChartLowestQuarterlyReturn" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="BarChartLowestQuarterlyReturn" order="22.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_BarChartLowestQuarterlyReturnDate" xlink:label="BarChartLowestQuarterlyReturnDate" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="BarChartLowestQuarterlyReturnDate" order="23.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_BarChartDoesNotReflectSalesLoads" xlink:label="BarChartDoesNotReflectSalesLoads" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="BarChartDoesNotReflectSalesLoads" order="8.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_BarChartReturnsForClassNotOfferedInProspectus" xlink:label="BarChartReturnsForClassNotOfferedInProspectus" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="BarChartReturnsForClassNotOfferedInProspectus" order="9.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_BarChartReasonSelectedClassDifferentFromImmediatelyPrecedingPeriod" xlink:label="BarChartReasonSelectedClassDifferentFromImmediatelyPrecedingPeriod" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="BarChartReasonSelectedClassDifferentFromImmediatelyPrecedingPeriod" order="10.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformancePastDoesNotIndicateFuture" xlink:label="PerformancePastDoesNotIndicateFuture" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformancePastDoesNotIndicateFuture" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceInformationIllustratesVariabilityOfReturns" xlink:label="PerformanceInformationIllustratesVariabilityOfReturns" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformanceInformationIllustratesVariabilityOfReturns" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceOneYearOrLess" xlink:label="PerformanceOneYearOrLess" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformanceOneYearOrLess" order="5.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceAdditionalMarketIndex" xlink:label="PerformanceAdditionalMarketIndex" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformanceAdditionalMarketIndex" order="6.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ClassAxis" xlink:label="ClassAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ClassAxis" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ShareClassDomain" xlink:label="ShareClassDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="ShareClassDomain" order="1.0" priority="1" />
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/2/role/InvestmentRisks" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:link="http://www.xbrl.org/2003/linkbase">
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusTable" xlink:label="ProspectusTable" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="DocumentInformationDocumentAxis" use="optional" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentDomain" xlink:label="DocumentDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="DocumentInformationDocumentAxis" xlink:to="DocumentDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="CoregistrantAxis" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AllCoregistrantsMember" xlink:label="AllCoregistrantsMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="CoregistrantAxis" xlink:to="AllCoregistrantsMember" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="LegalEntityAxis" use="optional" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityDomain" xlink:label="EntityDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="EntityDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusLineItems" xlink:label="ProspectusLineItems" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ProspectusLineItems" order="5.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_RiskTextBlock" xlink:label="RiskTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="RiskTextBlock" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_RiskAxis" xlink:label="RiskAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="RiskAxis" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AllRisksMember" xlink:label="AllRisksMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="RiskAxis" xlink:to="AllRisksMember" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_RiskLoseMoneyMember" xlink:label="RiskLoseMoneyMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="RiskAxis" xlink:to="RiskLoseMoneyMember" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_RiskNotInsuredDepositoryInstitutionMember" xlink:label="RiskNotInsuredDepositoryInstitutionMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="RiskAxis" xlink:to="RiskNotInsuredDepositoryInstitutionMember" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_RiskNotInsuredMember" xlink:label="RiskNotInsuredMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="RiskAxis" xlink:to="RiskNotInsuredMember" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_RiskNondiversifiedStatusMember" xlink:label="RiskNondiversifiedStatusMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="RiskAxis" xlink:to="RiskNondiversifiedStatusMember" order="5.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_RiskMoneyMarketFundPriceFluctuatesMember" xlink:label="RiskMoneyMarketFundPriceFluctuatesMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="RiskAxis" xlink:to="RiskMoneyMarketFundPriceFluctuatesMember" order="6.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_RiskMoneyMarketFundMayImposeFeesOrSuspendSalesMember" xlink:label="RiskMoneyMarketFundMayImposeFeesOrSuspendSalesMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="RiskAxis" xlink:to="RiskMoneyMarketFundMayImposeFeesOrSuspendSalesMember" order="7.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_RiskMoneyMarketFundMayNotPreserveDollarMember" xlink:label="RiskMoneyMarketFundMayNotPreserveDollarMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="RiskAxis" xlink:to="RiskMoneyMarketFundMayNotPreserveDollarMember" order="8.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_RiskMoneyMarketFundSponsorMayNotProvideSupportMember" xlink:label="RiskMoneyMarketFundSponsorMayNotProvideSupportMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="RiskAxis" xlink:to="RiskMoneyMarketFundSponsorMayNotProvideSupportMember" order="9.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_RisksAbstract" xlink:label="RisksAbstract" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="RisksAbstract" xlink:to="ProspectusTable" use="optional" order="1.0" priority="1" />
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/2/role/InvestmentStrategy" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:link="http://www.xbrl.org/2003/linkbase">
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_FormN1aAbstract" xlink:label="FormN1aAbstract" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusTable" xlink:label="ProspectusTable" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="FormN1aAbstract" xlink:to="ProspectusTable" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="DocumentInformationDocumentAxis" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentDomain" xlink:label="DocumentDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="DocumentInformationDocumentAxis" xlink:to="DocumentDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="CoregistrantAxis" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AllCoregistrantsMember" xlink:label="AllCoregistrantsMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="CoregistrantAxis" xlink:to="AllCoregistrantsMember" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="LegalEntityAxis" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityDomain" xlink:label="EntityDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="EntityDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusLineItems" xlink:label="ProspectusLineItems" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ProspectusLineItems" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_StrategyHeading" xlink:label="StrategyHeading" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="StrategyHeading" use="optional" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_StrategyNarrativeTextBlock" xlink:label="StrategyNarrativeTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="StrategyNarrativeTextBlock" use="optional" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_StrategyPortfolioConcentration" xlink:label="StrategyPortfolioConcentration" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="StrategyPortfolioConcentration" order="3.0" priority="1" />
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/2/role/FeesAndExpenses" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:link="http://www.xbrl.org/2003/linkbase">
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_FormN1aAbstract" xlink:label="FormN1aAbstract" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusTable" xlink:label="ProspectusTable" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="FormN1aAbstract" xlink:to="ProspectusTable" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="DocumentInformationDocumentAxis" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentDomain" xlink:label="DocumentDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="DocumentInformationDocumentAxis" xlink:to="DocumentDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="CoregistrantAxis" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AllCoregistrantsMember" xlink:label="AllCoregistrantsMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="CoregistrantAxis" xlink:to="AllCoregistrantsMember" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="LegalEntityAxis" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityDomain" xlink:label="EntityDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="EntityDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusLineItems" xlink:label="ProspectusLineItems" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ProspectusLineItems" order="5.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseHeading" xlink:label="ExpenseHeading" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseHeading" use="optional" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseNarrativeTextBlock" xlink:label="ExpenseNarrativeTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseNarrativeTextBlock" use="optional" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ShareholderFeesCaption" xlink:label="ShareholderFeesCaption" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ShareholderFeesCaption" use="optional" order="11.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_OperatingExpensesCaption" xlink:label="OperatingExpensesCaption" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="OperatingExpensesCaption" use="optional" order="13.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseFootnotesTextBlock" xlink:label="ExpenseFootnotesTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseFootnotesTextBlock" use="optional" order="15.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpensesDeferredChargesTextBlock" xlink:label="ExpensesDeferredChargesTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpensesDeferredChargesTextBlock" use="optional" order="16.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpensesRangeOfExchangeFeesTextBlock" xlink:label="ExpensesRangeOfExchangeFeesTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpensesRangeOfExchangeFeesTextBlock" use="optional" order="17.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleHeading" xlink:label="ExpenseExampleHeading" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleHeading" use="optional" order="18.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleByYearHeading" xlink:label="ExpenseExampleByYearHeading" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleByYearHeading" use="optional" order="19.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleNarrativeTextBlock" xlink:label="ExpenseExampleNarrativeTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleNarrativeTextBlock" use="optional" order="20.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleByYearCaption" xlink:label="ExpenseExampleByYearCaption" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleByYearCaption" use="optional" order="21.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleNoRedemptionNarrativeTextBlock" xlink:label="ExpenseExampleNoRedemptionNarrativeTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleNoRedemptionNarrativeTextBlock" use="optional" order="23.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleNoRedemptionByYearCaption" xlink:label="ExpenseExampleNoRedemptionByYearCaption" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleNoRedemptionByYearCaption" use="optional" order="24.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleFootnotesTextBlock" xlink:label="ExpenseExampleFootnotesTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleFootnotesTextBlock" use="optional" order="26.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleClosingTextBlock" xlink:label="ExpenseExampleClosingTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleClosingTextBlock" use="optional" order="27.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PortfolioTurnoverHeading" xlink:label="PortfolioTurnoverHeading" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PortfolioTurnoverHeading" use="optional" order="28.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PortfolioTurnoverTextBlock" xlink:label="PortfolioTurnoverTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PortfolioTurnoverTextBlock" use="optional" order="29.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ShareholderFeesTableTextBlock" xlink:label="ShareholderFeesTableTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ShareholderFeesTableTextBlock" use="optional" order="12.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AnnualFundOperatingExpensesTableTextBlock" xlink:label="AnnualFundOperatingExpensesTableTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="AnnualFundOperatingExpensesTableTextBlock" use="optional" order="14.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleWithRedemptionTableTextBlock" xlink:label="ExpenseExampleWithRedemptionTableTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleWithRedemptionTableTextBlock" use="optional" order="22.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleNoRedemptionTableTextBlock" xlink:label="ExpenseExampleNoRedemptionTableTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleNoRedemptionTableTextBlock" use="optional" order="25.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PortfolioTurnoverRate" xlink:label="PortfolioTurnoverRate" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PortfolioTurnoverRate" order="30.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseBreakpointDiscounts" xlink:label="ExpenseBreakpointDiscounts" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseBreakpointDiscounts" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpensesOtherExpensesHadExtraordinaryExpensesBeenIncluded" xlink:label="ExpensesOtherExpensesHadExtraordinaryExpensesBeenIncluded" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpensesOtherExpensesHadExtraordinaryExpensesBeenIncluded" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpensesRestatedToReflectCurrent" xlink:label="ExpensesRestatedToReflectCurrent" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpensesRestatedToReflectCurrent" order="5.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseBreakpointMinimumInvestmentRequiredAmount" xlink:label="ExpenseBreakpointMinimumInvestmentRequiredAmount" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseBreakpointMinimumInvestmentRequiredAmount" order="6.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_OtherExpensesNewFundBasedOnEstimates" xlink:label="OtherExpensesNewFundBasedOnEstimates" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="OtherExpensesNewFundBasedOnEstimates" order="7.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AcquiredFundFeesAndExpensesBasedOnEstimates" xlink:label="AcquiredFundFeesAndExpensesBasedOnEstimates" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="AcquiredFundFeesAndExpensesBasedOnEstimates" order="8.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpensesNotCorrelatedToRatioDueToAcquiredFundFees" xlink:label="ExpensesNotCorrelatedToRatioDueToAcquiredFundFees" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpensesNotCorrelatedToRatioDueToAcquiredFundFees" order="9.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpensesExplanationOfNonrecurringAccountFee" xlink:label="ExpensesExplanationOfNonrecurringAccountFee" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpensesExplanationOfNonrecurringAccountFee" order="10.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ClassAxis" xlink:label="ClassAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ClassAxis" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ShareClassDomain" xlink:label="ShareClassDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="ShareClassDomain" order="1.0" priority="1" />
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/2/role/N1aSupplement" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:link="http://www.xbrl.org/2003/linkbase">
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_FormN1aAbstract" xlink:label="FormN1aAbstract" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusTable" xlink:label="ProspectusTable" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="FormN1aAbstract" xlink:to="ProspectusTable" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="DocumentInformationDocumentAxis" use="optional" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentDomain" xlink:label="DocumentDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="DocumentInformationDocumentAxis" xlink:to="DocumentDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="CoregistrantAxis" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AllCoregistrantsMember" xlink:label="AllCoregistrantsMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="CoregistrantAxis" xlink:to="AllCoregistrantsMember" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="LegalEntityAxis" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityDomain" xlink:label="EntityDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="EntityDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusLineItems" xlink:label="ProspectusLineItems" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ProspectusLineItems" order="5.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_SupplementToProspectusTextBlock" xlink:label="SupplementToProspectusTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="SupplementToProspectusTextBlock" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ClassAxis" xlink:label="ClassAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ClassAxis" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ShareClassDomain" xlink:label="ShareClassDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="ShareClassDomain" order="1.0" priority="1" />
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/3/role/RiskReturn" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:link="http://www.xbrl.org/2003/linkbase">
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_FormN1aAbstract" xlink:label="FormN1aAbstract" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusTable" xlink:label="ProspectusTable" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="FormN1aAbstract" xlink:to="ProspectusTable" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="DocumentInformationDocumentAxis" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentDomain" xlink:label="DocumentDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="DocumentInformationDocumentAxis" xlink:to="DocumentDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="CoregistrantAxis" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AllCoregistrantsMember" xlink:label="AllCoregistrantsMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="CoregistrantAxis" xlink:to="AllCoregistrantsMember" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="LegalEntityAxis" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityDomain" xlink:label="EntityDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="EntityDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusLineItems" xlink:label="ProspectusLineItems" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ProspectusLineItems" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_RiskReturnHeading" xlink:label="RiskReturnHeading" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="RiskReturnHeading" use="optional" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ObjectiveHeading" xlink:label="ObjectiveHeading" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ObjectiveHeading" use="optional" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ObjectivePrimaryTextBlock" xlink:label="ObjectivePrimaryTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ObjectivePrimaryTextBlock" use="optional" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ObjectiveSecondaryTextBlock" xlink:label="ObjectiveSecondaryTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ObjectiveSecondaryTextBlock" use="optional" order="4.0" priority="1" />
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/3/role/ShareholderFeesData" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:link="http://www.xbrl.org/2003/linkbase">
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusTable" xlink:label="ProspectusTable" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="DocumentInformationDocumentAxis" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentDomain" xlink:label="DocumentDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="DocumentInformationDocumentAxis" xlink:to="DocumentDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="CoregistrantAxis" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AllCoregistrantsMember" xlink:label="AllCoregistrantsMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="CoregistrantAxis" xlink:to="AllCoregistrantsMember" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="LegalEntityAxis" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityDomain" xlink:label="EntityDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="EntityDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusLineItems" xlink:label="ProspectusLineItems" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ProspectusLineItems" order="5.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ShareholderFeesColumnName" xlink:label="ShareholderFeesColumnName" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ShareholderFeesColumnName" use="optional" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_MaximumCumulativeSalesChargeOverOfferingPrice" xlink:label="MaximumCumulativeSalesChargeOverOfferingPrice" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="MaximumCumulativeSalesChargeOverOfferingPrice" use="optional" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_MaximumCumulativeSalesChargeOverOther" xlink:label="MaximumCumulativeSalesChargeOverOther" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="MaximumCumulativeSalesChargeOverOther" use="optional" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice" xlink:label="MaximumSalesChargeImposedOnPurchasesOverOfferingPrice" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="MaximumSalesChargeImposedOnPurchasesOverOfferingPrice" use="optional" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_MaximumDeferredSalesChargeOverOfferingPrice" xlink:label="MaximumDeferredSalesChargeOverOfferingPrice" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="MaximumDeferredSalesChargeOverOfferingPrice" use="optional" order="5.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_MaximumDeferredSalesChargeOverOther" xlink:label="MaximumDeferredSalesChargeOverOther" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="MaximumDeferredSalesChargeOverOther" use="optional" order="6.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther" xlink:label="MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther" use="optional" order="7.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_RedemptionFeeOverRedemption" xlink:label="RedemptionFeeOverRedemption" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="RedemptionFeeOverRedemption" use="optional" order="8.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_RedemptionFee" xlink:label="RedemptionFee" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="RedemptionFee" use="optional" order="9.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExchangeFeeOverRedemption" xlink:label="ExchangeFeeOverRedemption" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExchangeFeeOverRedemption" use="optional" order="10.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExchangeFee" xlink:label="ExchangeFee" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExchangeFee" use="optional" order="11.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_MaximumAccountFeeOverAssets" xlink:label="MaximumAccountFeeOverAssets" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="MaximumAccountFeeOverAssets" use="optional" order="12.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_MaximumAccountFee" xlink:label="MaximumAccountFee" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="MaximumAccountFee" use="optional" order="13.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ShareholderFeeOther" xlink:label="ShareholderFeeOther" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ShareholderFeeOther" use="optional" order="14.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ClassAxis" xlink:label="ClassAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ClassAxis" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ShareClassDomain" xlink:label="ShareClassDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="ShareClassDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ShareholderFeesAbstract" xlink:label="ShareholderFeesAbstract" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ShareholderFeesAbstract" xlink:to="ProspectusTable" order="1.0" priority="1" />
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/3/role/OperatingExpensesData" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:link="http://www.xbrl.org/2003/linkbase">
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_FormN1aAbstract" xlink:label="FormN1aAbstract" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusTable" xlink:label="ProspectusTable" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="FormN1aAbstract" xlink:to="ProspectusTable" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="DocumentInformationDocumentAxis" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentDomain" xlink:label="DocumentDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="DocumentInformationDocumentAxis" xlink:to="DocumentDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="CoregistrantAxis" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AllCoregistrantsMember" xlink:label="AllCoregistrantsMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="CoregistrantAxis" xlink:to="AllCoregistrantsMember" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="LegalEntityAxis" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityDomain" xlink:label="EntityDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="EntityDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusLineItems" xlink:label="ProspectusLineItems" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ProspectusLineItems" order="5.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_OperatingExpensesColumnName" xlink:label="OperatingExpensesColumnName" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="OperatingExpensesColumnName" use="optional" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ManagementFeesOverAssets" xlink:label="ManagementFeesOverAssets" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ManagementFeesOverAssets" use="optional" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_DistributionAndService12b1FeesOverAssets" xlink:label="DistributionAndService12b1FeesOverAssets" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="DistributionAndService12b1FeesOverAssets" use="optional" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_DistributionOrSimilarNon12b1FeesOverAssets" xlink:label="DistributionOrSimilarNon12b1FeesOverAssets" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="DistributionOrSimilarNon12b1FeesOverAssets" use="optional" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_Component1OtherExpensesOverAssets" xlink:label="Component1OtherExpensesOverAssets" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="Component1OtherExpensesOverAssets" use="optional" order="5.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_Component2OtherExpensesOverAssets" xlink:label="Component2OtherExpensesOverAssets" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="Component2OtherExpensesOverAssets" use="optional" order="6.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_Component3OtherExpensesOverAssets" xlink:label="Component3OtherExpensesOverAssets" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="Component3OtherExpensesOverAssets" use="optional" order="7.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_OtherExpensesOverAssets" xlink:label="OtherExpensesOverAssets" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="OtherExpensesOverAssets" use="optional" order="8.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AcquiredFundFeesAndExpensesOverAssets" xlink:label="AcquiredFundFeesAndExpensesOverAssets" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="AcquiredFundFeesAndExpensesOverAssets" use="optional" order="9.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpensesOverAssets" xlink:label="ExpensesOverAssets" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpensesOverAssets" use="optional" order="10.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_FeeWaiverOrReimbursementOverAssets" xlink:label="FeeWaiverOrReimbursementOverAssets" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="FeeWaiverOrReimbursementOverAssets" use="optional" order="11.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_NetExpensesOverAssets" xlink:label="NetExpensesOverAssets" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="NetExpensesOverAssets" use="optional" order="12.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_FeeWaiverOrReimbursementOverAssetsDateOfTermination" xlink:label="FeeWaiverOrReimbursementOverAssetsDateOfTermination" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="FeeWaiverOrReimbursementOverAssetsDateOfTermination" order="13.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ClassAxis" xlink:label="ClassAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ClassAxis" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ShareClassDomain" xlink:label="ShareClassDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="ShareClassDomain" order="1.0" priority="1" />
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/3/role/ExpenseExample" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:link="http://www.xbrl.org/2003/linkbase">
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusTable" xlink:label="ProspectusTable" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="DocumentInformationDocumentAxis" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentDomain" xlink:label="DocumentDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="DocumentInformationDocumentAxis" xlink:to="DocumentDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="CoregistrantAxis" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AllCoregistrantsMember" xlink:label="AllCoregistrantsMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="CoregistrantAxis" xlink:to="AllCoregistrantsMember" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="LegalEntityAxis" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityDomain" xlink:label="EntityDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="EntityDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusLineItems" xlink:label="ProspectusLineItems" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ProspectusLineItems" order="5.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleByYearColumnName" xlink:label="ExpenseExampleByYearColumnName" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleByYearColumnName" use="optional" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleYear01" xlink:label="ExpenseExampleYear01" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleYear01" use="optional" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleYear03" xlink:label="ExpenseExampleYear03" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleYear03" use="optional" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleYear05" xlink:label="ExpenseExampleYear05" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleYear05" use="optional" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleYear10" xlink:label="ExpenseExampleYear10" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleYear10" use="optional" order="5.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ClassAxis" xlink:label="ClassAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ClassAxis" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ShareClassDomain" xlink:label="ShareClassDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="ShareClassDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleAbstract" xlink:label="ExpenseExampleAbstract" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ExpenseExampleAbstract" xlink:to="ProspectusTable" order="1.0" priority="1" />
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/3/role/ExpenseExampleNoRedemption" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:link="http://www.xbrl.org/2003/linkbase">
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusTable" xlink:label="ProspectusTable" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="DocumentInformationDocumentAxis" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentDomain" xlink:label="DocumentDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="DocumentInformationDocumentAxis" xlink:to="DocumentDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="CoregistrantAxis" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AllCoregistrantsMember" xlink:label="AllCoregistrantsMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="CoregistrantAxis" xlink:to="AllCoregistrantsMember" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="LegalEntityAxis" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityDomain" xlink:label="EntityDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="EntityDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusLineItems" xlink:label="ProspectusLineItems" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ProspectusLineItems" order="5.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleNoRedemptionByYearColumnName" xlink:label="ExpenseExampleNoRedemptionByYearColumnName" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleNoRedemptionByYearColumnName" use="optional" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleNoRedemptionYear01" xlink:label="ExpenseExampleNoRedemptionYear01" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleNoRedemptionYear01" use="optional" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleNoRedemptionYear03" xlink:label="ExpenseExampleNoRedemptionYear03" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleNoRedemptionYear03" use="optional" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleNoRedemptionYear05" xlink:label="ExpenseExampleNoRedemptionYear05" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleNoRedemptionYear05" use="optional" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleNoRedemptionYear10" xlink:label="ExpenseExampleNoRedemptionYear10" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleNoRedemptionYear10" use="optional" order="5.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ClassAxis" xlink:label="ClassAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ClassAxis" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ShareClassDomain" xlink:label="ShareClassDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="ShareClassDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleNoRedemptionAbstract" xlink:label="ExpenseExampleNoRedemptionAbstract" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ExpenseExampleNoRedemptionAbstract" xlink:to="ProspectusTable" order="1.0" priority="1" />
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/3/role/BarChartData" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:link="http://www.xbrl.org/2003/linkbase">
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusTable" xlink:label="ProspectusTable" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="DocumentInformationDocumentAxis" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentDomain" xlink:label="DocumentDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="DocumentInformationDocumentAxis" xlink:to="DocumentDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="CoregistrantAxis" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AllCoregistrantsMember" xlink:label="AllCoregistrantsMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="CoregistrantAxis" xlink:to="AllCoregistrantsMember" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="LegalEntityAxis" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityDomain" xlink:label="EntityDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="EntityDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusLineItems" xlink:label="ProspectusLineItems" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ProspectusLineItems" order="5.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AnnualReturnCaption" xlink:label="AnnualReturnCaption" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="AnnualReturnCaption" use="optional" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AnnualReturnColumnName" xlink:label="AnnualReturnColumnName" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="AnnualReturnColumnName" use="optional" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AnnualReturnInceptionDate" xlink:label="AnnualReturnInceptionDate" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="AnnualReturnInceptionDate" use="optional" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AnnlRtrPct" xlink:label="AnnlRtrPct" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="AnnlRtrPct" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ClassAxis" xlink:label="ClassAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ClassAxis" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ShareClassDomain" xlink:label="ShareClassDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="ShareClassDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_BarChartTableAbstract" xlink:label="BarChartTableAbstract" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="BarChartTableAbstract" xlink:to="ProspectusTable" order="1.0" priority="1" />
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/3/role/PerformanceTableData" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:link="http://www.xbrl.org/2003/linkbase">
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusTable" xlink:label="ProspectusTable" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="DocumentInformationDocumentAxis" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentDomain" xlink:label="DocumentDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="DocumentInformationDocumentAxis" xlink:to="DocumentDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="CoregistrantAxis" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AllCoregistrantsMember" xlink:label="AllCoregistrantsMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="CoregistrantAxis" xlink:to="AllCoregistrantsMember" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusLineItems" xlink:label="ProspectusLineItems" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ProspectusLineItems" order="5.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AverageAnnualReturnLabel" xlink:label="AverageAnnualReturnLabel" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="AverageAnnualReturnLabel" use="optional" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AvgAnnlRtrPct" xlink:label="AvgAnnlRtrPct" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="AvgAnnlRtrPct" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerfInceptionDate" xlink:label="PerfInceptionDate" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerfInceptionDate" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ClassAxis" xlink:label="ClassAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ClassAxis" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ShareClassDomain" xlink:label="ShareClassDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="ShareClassDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceMeasureAxis" xlink:label="PerformanceMeasureAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="PerformanceMeasureAxis" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceMeasureDomain" xlink:label="PerformanceMeasureDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="PerformanceMeasureAxis" xlink:to="PerformanceMeasureDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AfterTaxesOnDistributionsMember" xlink:label="AfterTaxesOnDistributionsMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="PerformanceMeasureDomain" xlink:to="AfterTaxesOnDistributionsMember" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AfterTaxesOnDistributionsAndSalesMember" xlink:label="AfterTaxesOnDistributionsAndSalesMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="PerformanceMeasureDomain" xlink:to="AfterTaxesOnDistributionsAndSalesMember" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AverageAnnualReturnAbstract" xlink:label="AverageAnnualReturnAbstract" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="AverageAnnualReturnAbstract" xlink:to="ProspectusTable" order="1.0" priority="1" />
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/3/role/N1aCover" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:link="http://www.xbrl.org/2003/linkbase">
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_FormN1aAbstract" xlink:label="FormN1aAbstract" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusTable" xlink:label="ProspectusTable" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="FormN1aAbstract" xlink:to="ProspectusTable" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="DocumentInformationDocumentAxis" use="optional" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentDomain" xlink:label="DocumentDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="DocumentInformationDocumentAxis" xlink:to="DocumentDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="CoregistrantAxis" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AllCoregistrantsMember" xlink:label="AllCoregistrantsMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="CoregistrantAxis" xlink:to="AllCoregistrantsMember" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusLineItems" xlink:label="ProspectusLineItems" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ProspectusLineItems" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentType" xlink:label="DocumentType" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="DocumentType" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_AmendmentFlag" xlink:label="AmendmentFlag" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="AmendmentFlag" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_AmendmentDescription" xlink:label="AmendmentDescription" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="AmendmentDescription" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityRegistrantName" xlink:label="EntityRegistrantName" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="EntityRegistrantName" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityCentralIndexKey" xlink:label="EntityCentralIndexKey" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="EntityCentralIndexKey" order="5.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityInvCompanyType" xlink:label="EntityInvCompanyType" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="EntityInvCompanyType" order="6.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentPeriodEndDate" xlink:label="DocumentPeriodEndDate" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="DocumentPeriodEndDate" order="7.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusDate" xlink:label="ProspectusDate" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ProspectusDate" order="8.0" priority="1" />
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/3/role/PerformanceManagement" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:link="http://www.xbrl.org/2003/linkbase">
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_FormN1aAbstract" xlink:label="FormN1aAbstract" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusTable" xlink:label="ProspectusTable" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="FormN1aAbstract" xlink:to="ProspectusTable" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="DocumentInformationDocumentAxis" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentDomain" xlink:label="DocumentDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="DocumentInformationDocumentAxis" xlink:to="DocumentDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="CoregistrantAxis" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AllCoregistrantsMember" xlink:label="AllCoregistrantsMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="CoregistrantAxis" xlink:to="AllCoregistrantsMember" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="LegalEntityAxis" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityDomain" xlink:label="EntityDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="EntityDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusLineItems" xlink:label="ProspectusLineItems" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ProspectusLineItems" order="5.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_BarChartAndPerformanceTableHeading" xlink:label="BarChartAndPerformanceTableHeading" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="BarChartAndPerformanceTableHeading" use="optional" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceNarrativeTextBlock" xlink:label="PerformanceNarrativeTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformanceNarrativeTextBlock" use="optional" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_BarChartNarrativeTextBlock" xlink:label="BarChartNarrativeTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="BarChartNarrativeTextBlock" use="optional" order="7.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_BarChartHeading" xlink:label="BarChartHeading" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="BarChartHeading" use="optional" order="11.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_BarChartFootnotesTextBlock" xlink:label="BarChartFootnotesTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="BarChartFootnotesTextBlock" use="optional" order="13.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_BarChartClosingTextBlock" xlink:label="BarChartClosingTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="BarChartClosingTextBlock" use="optional" order="14.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceTableHeading" xlink:label="PerformanceTableHeading" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformanceTableHeading" use="optional" order="24.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceTableNarrativeTextBlock" xlink:label="PerformanceTableNarrativeTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformanceTableNarrativeTextBlock" use="optional" order="25.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceTableClosingTextBlock" xlink:label="PerformanceTableClosingTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformanceTableClosingTextBlock" use="optional" order="39.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_BarChartTableTextBlock" xlink:label="BarChartTableTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="BarChartTableTextBlock" use="optional" order="12.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceTableTextBlock" xlink:label="PerformanceTableTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformanceTableTextBlock" use="optional" order="31.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_MarketIndexPerformanceTableTextBlock" xlink:label="MarketIndexPerformanceTableTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="MarketIndexPerformanceTableTextBlock" use="optional" order="34.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_MoneyMarketSevenDayYieldCaption" xlink:label="MoneyMarketSevenDayYieldCaption" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="MoneyMarketSevenDayYieldCaption" order="40.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_MoneyMarketSevenDayYieldColumnName" xlink:label="MoneyMarketSevenDayYieldColumnName" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="MoneyMarketSevenDayYieldColumnName" order="41.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_MoneyMarketSevenDayYieldPhone" xlink:label="MoneyMarketSevenDayYieldPhone" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="MoneyMarketSevenDayYieldPhone" order="42.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_MoneyMarketSevenDayYield" xlink:label="MoneyMarketSevenDayYield" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="MoneyMarketSevenDayYield" order="43.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_MoneyMarketSevenDayTaxEquivalentYield" xlink:label="MoneyMarketSevenDayTaxEquivalentYield" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="MoneyMarketSevenDayTaxEquivalentYield" order="44.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ThirtyDayYieldCaption" xlink:label="ThirtyDayYieldCaption" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ThirtyDayYieldCaption" order="45.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ThirtyDayYieldColumnName" xlink:label="ThirtyDayYieldColumnName" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ThirtyDayYieldColumnName" order="46.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ThirtyDayYieldPhone" xlink:label="ThirtyDayYieldPhone" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ThirtyDayYieldPhone" order="47.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ThirtyDayYield" xlink:label="ThirtyDayYield" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ThirtyDayYield" order="48.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ThirtyDayTaxEquivalentYield" xlink:label="ThirtyDayTaxEquivalentYield" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ThirtyDayTaxEquivalentYield" order="49.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceAvailabilityWebSiteAddress" xlink:label="PerformanceAvailabilityWebSiteAddress" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformanceAvailabilityWebSiteAddress" order="50.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceAvailabilityPhone" xlink:label="PerformanceAvailabilityPhone" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformanceAvailabilityPhone" order="51.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceTableFootnotesTextBlock" xlink:label="PerformanceTableFootnotesTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformanceTableFootnotesTextBlock" use="optional" order="35.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceTableFootnotesReasonPerformanceInformationForClassDifferentFromImmediatelyPrecedingPeriod" xlink:label="PerformanceTableFootnotesReasonPerformanceInformationForClassDifferentFromImmediatelyPrecedingPeriod" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformanceTableFootnotesReasonPerformanceInformationForClassDifferentFromImmediatelyPrecedingPeriod" order="36.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceTableOneClassOfAfterTaxShown" xlink:label="PerformanceTableOneClassOfAfterTaxShown" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformanceTableOneClassOfAfterTaxShown" order="37.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_IndexNoDeductionForFeesExpensesTaxes" xlink:label="IndexNoDeductionForFeesExpensesTaxes" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="IndexNoDeductionForFeesExpensesTaxes" order="38.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AverageAnnualReturnCaption" xlink:label="AverageAnnualReturnCaption" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="AverageAnnualReturnCaption" order="32.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AverageAnnualReturnColumnName" xlink:label="AverageAnnualReturnColumnName" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="AverageAnnualReturnColumnName" order="33.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceTableDoesReflectSalesLoads" xlink:label="PerformanceTableDoesReflectSalesLoads" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformanceTableDoesReflectSalesLoads" order="26.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceTableMarketIndexChanged" xlink:label="PerformanceTableMarketIndexChanged" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformanceTableMarketIndexChanged" order="27.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceTableUsesHighestFederalRate" xlink:label="PerformanceTableUsesHighestFederalRate" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformanceTableUsesHighestFederalRate" order="28.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceTableNotRelevantToTaxDeferred" xlink:label="PerformanceTableNotRelevantToTaxDeferred" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformanceTableNotRelevantToTaxDeferred" order="29.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceTableExplanationAfterTaxHigher" xlink:label="PerformanceTableExplanationAfterTaxHigher" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformanceTableExplanationAfterTaxHigher" order="30.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_YearToDateReturnLabel" xlink:label="YearToDateReturnLabel" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="YearToDateReturnLabel" order="15.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_BarChartYearToDateReturn" xlink:label="BarChartYearToDateReturn" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="BarChartYearToDateReturn" order="16.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_BarChartYearToDateReturnDate" xlink:label="BarChartYearToDateReturnDate" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="BarChartYearToDateReturnDate" order="17.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_HighestQuarterlyReturnLabel" xlink:label="HighestQuarterlyReturnLabel" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="HighestQuarterlyReturnLabel" order="18.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_BarChartHighestQuarterlyReturn" xlink:label="BarChartHighestQuarterlyReturn" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="BarChartHighestQuarterlyReturn" order="19.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_BarChartHighestQuarterlyReturnDate" xlink:label="BarChartHighestQuarterlyReturnDate" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="BarChartHighestQuarterlyReturnDate" order="20.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_LowestQuarterlyReturnLabel" xlink:label="LowestQuarterlyReturnLabel" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="LowestQuarterlyReturnLabel" order="21.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_BarChartLowestQuarterlyReturn" xlink:label="BarChartLowestQuarterlyReturn" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="BarChartLowestQuarterlyReturn" order="22.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_BarChartLowestQuarterlyReturnDate" xlink:label="BarChartLowestQuarterlyReturnDate" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="BarChartLowestQuarterlyReturnDate" order="23.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_BarChartDoesNotReflectSalesLoads" xlink:label="BarChartDoesNotReflectSalesLoads" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="BarChartDoesNotReflectSalesLoads" order="8.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_BarChartReturnsForClassNotOfferedInProspectus" xlink:label="BarChartReturnsForClassNotOfferedInProspectus" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="BarChartReturnsForClassNotOfferedInProspectus" order="9.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_BarChartReasonSelectedClassDifferentFromImmediatelyPrecedingPeriod" xlink:label="BarChartReasonSelectedClassDifferentFromImmediatelyPrecedingPeriod" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="BarChartReasonSelectedClassDifferentFromImmediatelyPrecedingPeriod" order="10.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformancePastDoesNotIndicateFuture" xlink:label="PerformancePastDoesNotIndicateFuture" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformancePastDoesNotIndicateFuture" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceInformationIllustratesVariabilityOfReturns" xlink:label="PerformanceInformationIllustratesVariabilityOfReturns" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformanceInformationIllustratesVariabilityOfReturns" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceOneYearOrLess" xlink:label="PerformanceOneYearOrLess" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformanceOneYearOrLess" order="5.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceAdditionalMarketIndex" xlink:label="PerformanceAdditionalMarketIndex" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformanceAdditionalMarketIndex" order="6.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ClassAxis" xlink:label="ClassAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ClassAxis" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ShareClassDomain" xlink:label="ShareClassDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="ShareClassDomain" order="1.0" priority="1" />
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/3/role/InvestmentRisks" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:link="http://www.xbrl.org/2003/linkbase">
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusTable" xlink:label="ProspectusTable" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="DocumentInformationDocumentAxis" use="optional" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentDomain" xlink:label="DocumentDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="DocumentInformationDocumentAxis" xlink:to="DocumentDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="CoregistrantAxis" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AllCoregistrantsMember" xlink:label="AllCoregistrantsMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="CoregistrantAxis" xlink:to="AllCoregistrantsMember" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="LegalEntityAxis" use="optional" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityDomain" xlink:label="EntityDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="EntityDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusLineItems" xlink:label="ProspectusLineItems" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ProspectusLineItems" order="5.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_RiskTextBlock" xlink:label="RiskTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="RiskTextBlock" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_RiskAxis" xlink:label="RiskAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="RiskAxis" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AllRisksMember" xlink:label="AllRisksMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="RiskAxis" xlink:to="AllRisksMember" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_RiskLoseMoneyMember" xlink:label="RiskLoseMoneyMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="RiskAxis" xlink:to="RiskLoseMoneyMember" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_RiskNotInsuredDepositoryInstitutionMember" xlink:label="RiskNotInsuredDepositoryInstitutionMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="RiskAxis" xlink:to="RiskNotInsuredDepositoryInstitutionMember" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_RiskNotInsuredMember" xlink:label="RiskNotInsuredMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="RiskAxis" xlink:to="RiskNotInsuredMember" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_RiskNondiversifiedStatusMember" xlink:label="RiskNondiversifiedStatusMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="RiskAxis" xlink:to="RiskNondiversifiedStatusMember" order="5.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_RiskMoneyMarketFundPriceFluctuatesMember" xlink:label="RiskMoneyMarketFundPriceFluctuatesMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="RiskAxis" xlink:to="RiskMoneyMarketFundPriceFluctuatesMember" order="6.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_RiskMoneyMarketFundMayImposeFeesOrSuspendSalesMember" xlink:label="RiskMoneyMarketFundMayImposeFeesOrSuspendSalesMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="RiskAxis" xlink:to="RiskMoneyMarketFundMayImposeFeesOrSuspendSalesMember" order="7.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_RiskMoneyMarketFundMayNotPreserveDollarMember" xlink:label="RiskMoneyMarketFundMayNotPreserveDollarMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="RiskAxis" xlink:to="RiskMoneyMarketFundMayNotPreserveDollarMember" order="8.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_RiskMoneyMarketFundSponsorMayNotProvideSupportMember" xlink:label="RiskMoneyMarketFundSponsorMayNotProvideSupportMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="RiskAxis" xlink:to="RiskMoneyMarketFundSponsorMayNotProvideSupportMember" order="9.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_RisksAbstract" xlink:label="RisksAbstract" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="RisksAbstract" xlink:to="ProspectusTable" use="optional" order="1.0" priority="1" />
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/3/role/InvestmentStrategy" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:link="http://www.xbrl.org/2003/linkbase">
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_FormN1aAbstract" xlink:label="FormN1aAbstract" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusTable" xlink:label="ProspectusTable" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="FormN1aAbstract" xlink:to="ProspectusTable" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="DocumentInformationDocumentAxis" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentDomain" xlink:label="DocumentDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="DocumentInformationDocumentAxis" xlink:to="DocumentDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="CoregistrantAxis" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AllCoregistrantsMember" xlink:label="AllCoregistrantsMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="CoregistrantAxis" xlink:to="AllCoregistrantsMember" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="LegalEntityAxis" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityDomain" xlink:label="EntityDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="EntityDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusLineItems" xlink:label="ProspectusLineItems" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ProspectusLineItems" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_StrategyHeading" xlink:label="StrategyHeading" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="StrategyHeading" use="optional" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_StrategyNarrativeTextBlock" xlink:label="StrategyNarrativeTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="StrategyNarrativeTextBlock" use="optional" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_StrategyPortfolioConcentration" xlink:label="StrategyPortfolioConcentration" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="StrategyPortfolioConcentration" order="3.0" priority="1" />
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/3/role/FeesAndExpenses" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:link="http://www.xbrl.org/2003/linkbase">
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_FormN1aAbstract" xlink:label="FormN1aAbstract" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusTable" xlink:label="ProspectusTable" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="FormN1aAbstract" xlink:to="ProspectusTable" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="DocumentInformationDocumentAxis" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentDomain" xlink:label="DocumentDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="DocumentInformationDocumentAxis" xlink:to="DocumentDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="CoregistrantAxis" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AllCoregistrantsMember" xlink:label="AllCoregistrantsMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="CoregistrantAxis" xlink:to="AllCoregistrantsMember" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="LegalEntityAxis" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityDomain" xlink:label="EntityDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="EntityDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusLineItems" xlink:label="ProspectusLineItems" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ProspectusLineItems" order="5.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseHeading" xlink:label="ExpenseHeading" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseHeading" use="optional" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseNarrativeTextBlock" xlink:label="ExpenseNarrativeTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseNarrativeTextBlock" use="optional" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ShareholderFeesCaption" xlink:label="ShareholderFeesCaption" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ShareholderFeesCaption" use="optional" order="11.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_OperatingExpensesCaption" xlink:label="OperatingExpensesCaption" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="OperatingExpensesCaption" use="optional" order="13.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseFootnotesTextBlock" xlink:label="ExpenseFootnotesTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseFootnotesTextBlock" use="optional" order="15.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpensesDeferredChargesTextBlock" xlink:label="ExpensesDeferredChargesTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpensesDeferredChargesTextBlock" use="optional" order="16.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpensesRangeOfExchangeFeesTextBlock" xlink:label="ExpensesRangeOfExchangeFeesTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpensesRangeOfExchangeFeesTextBlock" use="optional" order="17.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleHeading" xlink:label="ExpenseExampleHeading" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleHeading" use="optional" order="18.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleByYearHeading" xlink:label="ExpenseExampleByYearHeading" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleByYearHeading" use="optional" order="19.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleNarrativeTextBlock" xlink:label="ExpenseExampleNarrativeTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleNarrativeTextBlock" use="optional" order="20.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleByYearCaption" xlink:label="ExpenseExampleByYearCaption" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleByYearCaption" use="optional" order="21.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleNoRedemptionNarrativeTextBlock" xlink:label="ExpenseExampleNoRedemptionNarrativeTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleNoRedemptionNarrativeTextBlock" use="optional" order="23.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleNoRedemptionByYearCaption" xlink:label="ExpenseExampleNoRedemptionByYearCaption" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleNoRedemptionByYearCaption" use="optional" order="24.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleFootnotesTextBlock" xlink:label="ExpenseExampleFootnotesTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleFootnotesTextBlock" use="optional" order="26.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleClosingTextBlock" xlink:label="ExpenseExampleClosingTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleClosingTextBlock" use="optional" order="27.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PortfolioTurnoverHeading" xlink:label="PortfolioTurnoverHeading" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PortfolioTurnoverHeading" use="optional" order="28.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PortfolioTurnoverTextBlock" xlink:label="PortfolioTurnoverTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PortfolioTurnoverTextBlock" use="optional" order="29.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ShareholderFeesTableTextBlock" xlink:label="ShareholderFeesTableTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ShareholderFeesTableTextBlock" use="optional" order="12.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AnnualFundOperatingExpensesTableTextBlock" xlink:label="AnnualFundOperatingExpensesTableTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="AnnualFundOperatingExpensesTableTextBlock" use="optional" order="14.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleWithRedemptionTableTextBlock" xlink:label="ExpenseExampleWithRedemptionTableTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleWithRedemptionTableTextBlock" use="optional" order="22.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleNoRedemptionTableTextBlock" xlink:label="ExpenseExampleNoRedemptionTableTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleNoRedemptionTableTextBlock" use="optional" order="25.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PortfolioTurnoverRate" xlink:label="PortfolioTurnoverRate" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PortfolioTurnoverRate" order="30.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseBreakpointDiscounts" xlink:label="ExpenseBreakpointDiscounts" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseBreakpointDiscounts" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpensesOtherExpensesHadExtraordinaryExpensesBeenIncluded" xlink:label="ExpensesOtherExpensesHadExtraordinaryExpensesBeenIncluded" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpensesOtherExpensesHadExtraordinaryExpensesBeenIncluded" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpensesRestatedToReflectCurrent" xlink:label="ExpensesRestatedToReflectCurrent" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpensesRestatedToReflectCurrent" order="5.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseBreakpointMinimumInvestmentRequiredAmount" xlink:label="ExpenseBreakpointMinimumInvestmentRequiredAmount" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseBreakpointMinimumInvestmentRequiredAmount" order="6.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_OtherExpensesNewFundBasedOnEstimates" xlink:label="OtherExpensesNewFundBasedOnEstimates" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="OtherExpensesNewFundBasedOnEstimates" order="7.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AcquiredFundFeesAndExpensesBasedOnEstimates" xlink:label="AcquiredFundFeesAndExpensesBasedOnEstimates" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="AcquiredFundFeesAndExpensesBasedOnEstimates" order="8.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpensesNotCorrelatedToRatioDueToAcquiredFundFees" xlink:label="ExpensesNotCorrelatedToRatioDueToAcquiredFundFees" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpensesNotCorrelatedToRatioDueToAcquiredFundFees" order="9.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpensesExplanationOfNonrecurringAccountFee" xlink:label="ExpensesExplanationOfNonrecurringAccountFee" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpensesExplanationOfNonrecurringAccountFee" order="10.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ClassAxis" xlink:label="ClassAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ClassAxis" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ShareClassDomain" xlink:label="ShareClassDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="ShareClassDomain" order="1.0" priority="1" />
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/3/role/N1aSupplement" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:link="http://www.xbrl.org/2003/linkbase">
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_FormN1aAbstract" xlink:label="FormN1aAbstract" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusTable" xlink:label="ProspectusTable" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="FormN1aAbstract" xlink:to="ProspectusTable" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="DocumentInformationDocumentAxis" use="optional" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentDomain" xlink:label="DocumentDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="DocumentInformationDocumentAxis" xlink:to="DocumentDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="CoregistrantAxis" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AllCoregistrantsMember" xlink:label="AllCoregistrantsMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="CoregistrantAxis" xlink:to="AllCoregistrantsMember" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="LegalEntityAxis" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityDomain" xlink:label="EntityDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="EntityDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusLineItems" xlink:label="ProspectusLineItems" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ProspectusLineItems" order="5.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_SupplementToProspectusTextBlock" xlink:label="SupplementToProspectusTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="SupplementToProspectusTextBlock" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ClassAxis" xlink:label="ClassAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ClassAxis" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ShareClassDomain" xlink:label="ShareClassDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="ShareClassDomain" order="1.0" priority="1" />
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/4/role/RiskReturn" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:link="http://www.xbrl.org/2003/linkbase">
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_FormN1aAbstract" xlink:label="FormN1aAbstract" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusTable" xlink:label="ProspectusTable" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="FormN1aAbstract" xlink:to="ProspectusTable" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="DocumentInformationDocumentAxis" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentDomain" xlink:label="DocumentDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="DocumentInformationDocumentAxis" xlink:to="DocumentDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="CoregistrantAxis" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AllCoregistrantsMember" xlink:label="AllCoregistrantsMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="CoregistrantAxis" xlink:to="AllCoregistrantsMember" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="LegalEntityAxis" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityDomain" xlink:label="EntityDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="EntityDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusLineItems" xlink:label="ProspectusLineItems" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ProspectusLineItems" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_RiskReturnHeading" xlink:label="RiskReturnHeading" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="RiskReturnHeading" use="optional" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ObjectiveHeading" xlink:label="ObjectiveHeading" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ObjectiveHeading" use="optional" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ObjectivePrimaryTextBlock" xlink:label="ObjectivePrimaryTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ObjectivePrimaryTextBlock" use="optional" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ObjectiveSecondaryTextBlock" xlink:label="ObjectiveSecondaryTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ObjectiveSecondaryTextBlock" use="optional" order="4.0" priority="1" />
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/4/role/ShareholderFeesData" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:link="http://www.xbrl.org/2003/linkbase">
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusTable" xlink:label="ProspectusTable" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="DocumentInformationDocumentAxis" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentDomain" xlink:label="DocumentDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="DocumentInformationDocumentAxis" xlink:to="DocumentDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="CoregistrantAxis" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AllCoregistrantsMember" xlink:label="AllCoregistrantsMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="CoregistrantAxis" xlink:to="AllCoregistrantsMember" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="LegalEntityAxis" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityDomain" xlink:label="EntityDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="EntityDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusLineItems" xlink:label="ProspectusLineItems" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ProspectusLineItems" order="5.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ShareholderFeesColumnName" xlink:label="ShareholderFeesColumnName" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ShareholderFeesColumnName" use="optional" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_MaximumCumulativeSalesChargeOverOfferingPrice" xlink:label="MaximumCumulativeSalesChargeOverOfferingPrice" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="MaximumCumulativeSalesChargeOverOfferingPrice" use="optional" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_MaximumCumulativeSalesChargeOverOther" xlink:label="MaximumCumulativeSalesChargeOverOther" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="MaximumCumulativeSalesChargeOverOther" use="optional" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice" xlink:label="MaximumSalesChargeImposedOnPurchasesOverOfferingPrice" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="MaximumSalesChargeImposedOnPurchasesOverOfferingPrice" use="optional" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_MaximumDeferredSalesChargeOverOfferingPrice" xlink:label="MaximumDeferredSalesChargeOverOfferingPrice" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="MaximumDeferredSalesChargeOverOfferingPrice" use="optional" order="5.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_MaximumDeferredSalesChargeOverOther" xlink:label="MaximumDeferredSalesChargeOverOther" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="MaximumDeferredSalesChargeOverOther" use="optional" order="6.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther" xlink:label="MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther" use="optional" order="7.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_RedemptionFeeOverRedemption" xlink:label="RedemptionFeeOverRedemption" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="RedemptionFeeOverRedemption" use="optional" order="8.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_RedemptionFee" xlink:label="RedemptionFee" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="RedemptionFee" use="optional" order="9.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExchangeFeeOverRedemption" xlink:label="ExchangeFeeOverRedemption" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExchangeFeeOverRedemption" use="optional" order="10.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExchangeFee" xlink:label="ExchangeFee" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExchangeFee" use="optional" order="11.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_MaximumAccountFeeOverAssets" xlink:label="MaximumAccountFeeOverAssets" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="MaximumAccountFeeOverAssets" use="optional" order="12.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_MaximumAccountFee" xlink:label="MaximumAccountFee" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="MaximumAccountFee" use="optional" order="13.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ShareholderFeeOther" xlink:label="ShareholderFeeOther" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ShareholderFeeOther" use="optional" order="14.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ClassAxis" xlink:label="ClassAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ClassAxis" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ShareClassDomain" xlink:label="ShareClassDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="ShareClassDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ShareholderFeesAbstract" xlink:label="ShareholderFeesAbstract" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ShareholderFeesAbstract" xlink:to="ProspectusTable" order="1.0" priority="1" />
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/4/role/OperatingExpensesData" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:link="http://www.xbrl.org/2003/linkbase">
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_FormN1aAbstract" xlink:label="FormN1aAbstract" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusTable" xlink:label="ProspectusTable" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="FormN1aAbstract" xlink:to="ProspectusTable" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="DocumentInformationDocumentAxis" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentDomain" xlink:label="DocumentDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="DocumentInformationDocumentAxis" xlink:to="DocumentDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="CoregistrantAxis" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AllCoregistrantsMember" xlink:label="AllCoregistrantsMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="CoregistrantAxis" xlink:to="AllCoregistrantsMember" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="LegalEntityAxis" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityDomain" xlink:label="EntityDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="EntityDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusLineItems" xlink:label="ProspectusLineItems" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ProspectusLineItems" order="5.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_OperatingExpensesColumnName" xlink:label="OperatingExpensesColumnName" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="OperatingExpensesColumnName" use="optional" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ManagementFeesOverAssets" xlink:label="ManagementFeesOverAssets" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ManagementFeesOverAssets" use="optional" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_DistributionAndService12b1FeesOverAssets" xlink:label="DistributionAndService12b1FeesOverAssets" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="DistributionAndService12b1FeesOverAssets" use="optional" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_DistributionOrSimilarNon12b1FeesOverAssets" xlink:label="DistributionOrSimilarNon12b1FeesOverAssets" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="DistributionOrSimilarNon12b1FeesOverAssets" use="optional" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_Component1OtherExpensesOverAssets" xlink:label="Component1OtherExpensesOverAssets" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="Component1OtherExpensesOverAssets" use="optional" order="5.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_Component2OtherExpensesOverAssets" xlink:label="Component2OtherExpensesOverAssets" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="Component2OtherExpensesOverAssets" use="optional" order="6.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_Component3OtherExpensesOverAssets" xlink:label="Component3OtherExpensesOverAssets" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="Component3OtherExpensesOverAssets" use="optional" order="7.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_OtherExpensesOverAssets" xlink:label="OtherExpensesOverAssets" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="OtherExpensesOverAssets" use="optional" order="8.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AcquiredFundFeesAndExpensesOverAssets" xlink:label="AcquiredFundFeesAndExpensesOverAssets" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="AcquiredFundFeesAndExpensesOverAssets" use="optional" order="9.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpensesOverAssets" xlink:label="ExpensesOverAssets" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpensesOverAssets" use="optional" order="10.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_FeeWaiverOrReimbursementOverAssets" xlink:label="FeeWaiverOrReimbursementOverAssets" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="FeeWaiverOrReimbursementOverAssets" use="optional" order="11.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_NetExpensesOverAssets" xlink:label="NetExpensesOverAssets" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="NetExpensesOverAssets" use="optional" order="12.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_FeeWaiverOrReimbursementOverAssetsDateOfTermination" xlink:label="FeeWaiverOrReimbursementOverAssetsDateOfTermination" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="FeeWaiverOrReimbursementOverAssetsDateOfTermination" order="13.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ClassAxis" xlink:label="ClassAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ClassAxis" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ShareClassDomain" xlink:label="ShareClassDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="ShareClassDomain" order="1.0" priority="1" />
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/4/role/ExpenseExample" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:link="http://www.xbrl.org/2003/linkbase">
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusTable" xlink:label="ProspectusTable" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="DocumentInformationDocumentAxis" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentDomain" xlink:label="DocumentDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="DocumentInformationDocumentAxis" xlink:to="DocumentDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="CoregistrantAxis" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AllCoregistrantsMember" xlink:label="AllCoregistrantsMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="CoregistrantAxis" xlink:to="AllCoregistrantsMember" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="LegalEntityAxis" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityDomain" xlink:label="EntityDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="EntityDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusLineItems" xlink:label="ProspectusLineItems" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ProspectusLineItems" order="5.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleByYearColumnName" xlink:label="ExpenseExampleByYearColumnName" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleByYearColumnName" use="optional" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleYear01" xlink:label="ExpenseExampleYear01" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleYear01" use="optional" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleYear03" xlink:label="ExpenseExampleYear03" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleYear03" use="optional" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleYear05" xlink:label="ExpenseExampleYear05" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleYear05" use="optional" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleYear10" xlink:label="ExpenseExampleYear10" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleYear10" use="optional" order="5.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ClassAxis" xlink:label="ClassAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ClassAxis" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ShareClassDomain" xlink:label="ShareClassDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="ShareClassDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleAbstract" xlink:label="ExpenseExampleAbstract" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ExpenseExampleAbstract" xlink:to="ProspectusTable" order="1.0" priority="1" />
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/4/role/ExpenseExampleNoRedemption" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:link="http://www.xbrl.org/2003/linkbase">
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusTable" xlink:label="ProspectusTable" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="DocumentInformationDocumentAxis" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentDomain" xlink:label="DocumentDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="DocumentInformationDocumentAxis" xlink:to="DocumentDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="CoregistrantAxis" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AllCoregistrantsMember" xlink:label="AllCoregistrantsMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="CoregistrantAxis" xlink:to="AllCoregistrantsMember" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="LegalEntityAxis" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityDomain" xlink:label="EntityDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="EntityDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusLineItems" xlink:label="ProspectusLineItems" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ProspectusLineItems" order="5.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleNoRedemptionByYearColumnName" xlink:label="ExpenseExampleNoRedemptionByYearColumnName" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleNoRedemptionByYearColumnName" use="optional" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleNoRedemptionYear01" xlink:label="ExpenseExampleNoRedemptionYear01" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleNoRedemptionYear01" use="optional" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleNoRedemptionYear03" xlink:label="ExpenseExampleNoRedemptionYear03" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleNoRedemptionYear03" use="optional" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleNoRedemptionYear05" xlink:label="ExpenseExampleNoRedemptionYear05" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleNoRedemptionYear05" use="optional" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleNoRedemptionYear10" xlink:label="ExpenseExampleNoRedemptionYear10" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleNoRedemptionYear10" use="optional" order="5.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ClassAxis" xlink:label="ClassAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ClassAxis" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ShareClassDomain" xlink:label="ShareClassDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="ShareClassDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleNoRedemptionAbstract" xlink:label="ExpenseExampleNoRedemptionAbstract" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ExpenseExampleNoRedemptionAbstract" xlink:to="ProspectusTable" order="1.0" priority="1" />
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/4/role/BarChartData" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:link="http://www.xbrl.org/2003/linkbase">
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusTable" xlink:label="ProspectusTable" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="DocumentInformationDocumentAxis" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentDomain" xlink:label="DocumentDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="DocumentInformationDocumentAxis" xlink:to="DocumentDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="CoregistrantAxis" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AllCoregistrantsMember" xlink:label="AllCoregistrantsMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="CoregistrantAxis" xlink:to="AllCoregistrantsMember" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="LegalEntityAxis" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityDomain" xlink:label="EntityDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="EntityDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusLineItems" xlink:label="ProspectusLineItems" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ProspectusLineItems" order="5.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AnnualReturnCaption" xlink:label="AnnualReturnCaption" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="AnnualReturnCaption" use="optional" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AnnualReturnColumnName" xlink:label="AnnualReturnColumnName" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="AnnualReturnColumnName" use="optional" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AnnualReturnInceptionDate" xlink:label="AnnualReturnInceptionDate" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="AnnualReturnInceptionDate" use="optional" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AnnlRtrPct" xlink:label="AnnlRtrPct" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="AnnlRtrPct" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ClassAxis" xlink:label="ClassAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ClassAxis" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ShareClassDomain" xlink:label="ShareClassDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="ShareClassDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_BarChartTableAbstract" xlink:label="BarChartTableAbstract" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="BarChartTableAbstract" xlink:to="ProspectusTable" order="1.0" priority="1" />
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/4/role/PerformanceTableData" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:link="http://www.xbrl.org/2003/linkbase">
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusTable" xlink:label="ProspectusTable" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="DocumentInformationDocumentAxis" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentDomain" xlink:label="DocumentDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="DocumentInformationDocumentAxis" xlink:to="DocumentDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="CoregistrantAxis" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AllCoregistrantsMember" xlink:label="AllCoregistrantsMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="CoregistrantAxis" xlink:to="AllCoregistrantsMember" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusLineItems" xlink:label="ProspectusLineItems" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ProspectusLineItems" order="5.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AverageAnnualReturnLabel" xlink:label="AverageAnnualReturnLabel" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="AverageAnnualReturnLabel" use="optional" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AvgAnnlRtrPct" xlink:label="AvgAnnlRtrPct" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="AvgAnnlRtrPct" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerfInceptionDate" xlink:label="PerfInceptionDate" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerfInceptionDate" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ClassAxis" xlink:label="ClassAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ClassAxis" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ShareClassDomain" xlink:label="ShareClassDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="ShareClassDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceMeasureAxis" xlink:label="PerformanceMeasureAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="PerformanceMeasureAxis" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceMeasureDomain" xlink:label="PerformanceMeasureDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="PerformanceMeasureAxis" xlink:to="PerformanceMeasureDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AfterTaxesOnDistributionsMember" xlink:label="AfterTaxesOnDistributionsMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="PerformanceMeasureDomain" xlink:to="AfterTaxesOnDistributionsMember" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AfterTaxesOnDistributionsAndSalesMember" xlink:label="AfterTaxesOnDistributionsAndSalesMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="PerformanceMeasureDomain" xlink:to="AfterTaxesOnDistributionsAndSalesMember" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AverageAnnualReturnAbstract" xlink:label="AverageAnnualReturnAbstract" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="AverageAnnualReturnAbstract" xlink:to="ProspectusTable" order="1.0" priority="1" />
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/4/role/N1aCover" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:link="http://www.xbrl.org/2003/linkbase">
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_FormN1aAbstract" xlink:label="FormN1aAbstract" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusTable" xlink:label="ProspectusTable" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="FormN1aAbstract" xlink:to="ProspectusTable" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="DocumentInformationDocumentAxis" use="optional" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentDomain" xlink:label="DocumentDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="DocumentInformationDocumentAxis" xlink:to="DocumentDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="CoregistrantAxis" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AllCoregistrantsMember" xlink:label="AllCoregistrantsMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="CoregistrantAxis" xlink:to="AllCoregistrantsMember" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusLineItems" xlink:label="ProspectusLineItems" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ProspectusLineItems" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentType" xlink:label="DocumentType" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="DocumentType" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_AmendmentFlag" xlink:label="AmendmentFlag" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="AmendmentFlag" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_AmendmentDescription" xlink:label="AmendmentDescription" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="AmendmentDescription" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityRegistrantName" xlink:label="EntityRegistrantName" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="EntityRegistrantName" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityCentralIndexKey" xlink:label="EntityCentralIndexKey" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="EntityCentralIndexKey" order="5.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityInvCompanyType" xlink:label="EntityInvCompanyType" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="EntityInvCompanyType" order="6.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentPeriodEndDate" xlink:label="DocumentPeriodEndDate" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="DocumentPeriodEndDate" order="7.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusDate" xlink:label="ProspectusDate" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ProspectusDate" order="8.0" priority="1" />
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/4/role/PerformanceManagement" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:link="http://www.xbrl.org/2003/linkbase">
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_FormN1aAbstract" xlink:label="FormN1aAbstract" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusTable" xlink:label="ProspectusTable" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="FormN1aAbstract" xlink:to="ProspectusTable" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="DocumentInformationDocumentAxis" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentDomain" xlink:label="DocumentDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="DocumentInformationDocumentAxis" xlink:to="DocumentDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="CoregistrantAxis" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AllCoregistrantsMember" xlink:label="AllCoregistrantsMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="CoregistrantAxis" xlink:to="AllCoregistrantsMember" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="LegalEntityAxis" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityDomain" xlink:label="EntityDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="EntityDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusLineItems" xlink:label="ProspectusLineItems" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ProspectusLineItems" order="5.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_BarChartAndPerformanceTableHeading" xlink:label="BarChartAndPerformanceTableHeading" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="BarChartAndPerformanceTableHeading" use="optional" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceNarrativeTextBlock" xlink:label="PerformanceNarrativeTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformanceNarrativeTextBlock" use="optional" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_BarChartNarrativeTextBlock" xlink:label="BarChartNarrativeTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="BarChartNarrativeTextBlock" use="optional" order="7.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_BarChartHeading" xlink:label="BarChartHeading" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="BarChartHeading" use="optional" order="11.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_BarChartFootnotesTextBlock" xlink:label="BarChartFootnotesTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="BarChartFootnotesTextBlock" use="optional" order="13.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_BarChartClosingTextBlock" xlink:label="BarChartClosingTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="BarChartClosingTextBlock" use="optional" order="14.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceTableHeading" xlink:label="PerformanceTableHeading" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformanceTableHeading" use="optional" order="24.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceTableNarrativeTextBlock" xlink:label="PerformanceTableNarrativeTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformanceTableNarrativeTextBlock" use="optional" order="25.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceTableClosingTextBlock" xlink:label="PerformanceTableClosingTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformanceTableClosingTextBlock" use="optional" order="39.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_BarChartTableTextBlock" xlink:label="BarChartTableTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="BarChartTableTextBlock" use="optional" order="12.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceTableTextBlock" xlink:label="PerformanceTableTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformanceTableTextBlock" use="optional" order="31.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_MarketIndexPerformanceTableTextBlock" xlink:label="MarketIndexPerformanceTableTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="MarketIndexPerformanceTableTextBlock" use="optional" order="34.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_MoneyMarketSevenDayYieldCaption" xlink:label="MoneyMarketSevenDayYieldCaption" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="MoneyMarketSevenDayYieldCaption" order="40.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_MoneyMarketSevenDayYieldColumnName" xlink:label="MoneyMarketSevenDayYieldColumnName" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="MoneyMarketSevenDayYieldColumnName" order="41.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_MoneyMarketSevenDayYieldPhone" xlink:label="MoneyMarketSevenDayYieldPhone" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="MoneyMarketSevenDayYieldPhone" order="42.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_MoneyMarketSevenDayYield" xlink:label="MoneyMarketSevenDayYield" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="MoneyMarketSevenDayYield" order="43.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_MoneyMarketSevenDayTaxEquivalentYield" xlink:label="MoneyMarketSevenDayTaxEquivalentYield" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="MoneyMarketSevenDayTaxEquivalentYield" order="44.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ThirtyDayYieldCaption" xlink:label="ThirtyDayYieldCaption" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ThirtyDayYieldCaption" order="45.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ThirtyDayYieldColumnName" xlink:label="ThirtyDayYieldColumnName" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ThirtyDayYieldColumnName" order="46.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ThirtyDayYieldPhone" xlink:label="ThirtyDayYieldPhone" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ThirtyDayYieldPhone" order="47.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ThirtyDayYield" xlink:label="ThirtyDayYield" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ThirtyDayYield" order="48.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ThirtyDayTaxEquivalentYield" xlink:label="ThirtyDayTaxEquivalentYield" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ThirtyDayTaxEquivalentYield" order="49.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceAvailabilityWebSiteAddress" xlink:label="PerformanceAvailabilityWebSiteAddress" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformanceAvailabilityWebSiteAddress" order="50.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceAvailabilityPhone" xlink:label="PerformanceAvailabilityPhone" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformanceAvailabilityPhone" order="51.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceTableFootnotesTextBlock" xlink:label="PerformanceTableFootnotesTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformanceTableFootnotesTextBlock" use="optional" order="35.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceTableFootnotesReasonPerformanceInformationForClassDifferentFromImmediatelyPrecedingPeriod" xlink:label="PerformanceTableFootnotesReasonPerformanceInformationForClassDifferentFromImmediatelyPrecedingPeriod" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformanceTableFootnotesReasonPerformanceInformationForClassDifferentFromImmediatelyPrecedingPeriod" order="36.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceTableOneClassOfAfterTaxShown" xlink:label="PerformanceTableOneClassOfAfterTaxShown" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformanceTableOneClassOfAfterTaxShown" order="37.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_IndexNoDeductionForFeesExpensesTaxes" xlink:label="IndexNoDeductionForFeesExpensesTaxes" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="IndexNoDeductionForFeesExpensesTaxes" order="38.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AverageAnnualReturnCaption" xlink:label="AverageAnnualReturnCaption" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="AverageAnnualReturnCaption" order="32.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AverageAnnualReturnColumnName" xlink:label="AverageAnnualReturnColumnName" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="AverageAnnualReturnColumnName" order="33.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceTableDoesReflectSalesLoads" xlink:label="PerformanceTableDoesReflectSalesLoads" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformanceTableDoesReflectSalesLoads" order="26.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceTableMarketIndexChanged" xlink:label="PerformanceTableMarketIndexChanged" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformanceTableMarketIndexChanged" order="27.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceTableUsesHighestFederalRate" xlink:label="PerformanceTableUsesHighestFederalRate" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformanceTableUsesHighestFederalRate" order="28.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceTableNotRelevantToTaxDeferred" xlink:label="PerformanceTableNotRelevantToTaxDeferred" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformanceTableNotRelevantToTaxDeferred" order="29.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceTableExplanationAfterTaxHigher" xlink:label="PerformanceTableExplanationAfterTaxHigher" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformanceTableExplanationAfterTaxHigher" order="30.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_YearToDateReturnLabel" xlink:label="YearToDateReturnLabel" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="YearToDateReturnLabel" order="15.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_BarChartYearToDateReturn" xlink:label="BarChartYearToDateReturn" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="BarChartYearToDateReturn" order="16.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_BarChartYearToDateReturnDate" xlink:label="BarChartYearToDateReturnDate" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="BarChartYearToDateReturnDate" order="17.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_HighestQuarterlyReturnLabel" xlink:label="HighestQuarterlyReturnLabel" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="HighestQuarterlyReturnLabel" order="18.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_BarChartHighestQuarterlyReturn" xlink:label="BarChartHighestQuarterlyReturn" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="BarChartHighestQuarterlyReturn" order="19.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_BarChartHighestQuarterlyReturnDate" xlink:label="BarChartHighestQuarterlyReturnDate" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="BarChartHighestQuarterlyReturnDate" order="20.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_LowestQuarterlyReturnLabel" xlink:label="LowestQuarterlyReturnLabel" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="LowestQuarterlyReturnLabel" order="21.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_BarChartLowestQuarterlyReturn" xlink:label="BarChartLowestQuarterlyReturn" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="BarChartLowestQuarterlyReturn" order="22.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_BarChartLowestQuarterlyReturnDate" xlink:label="BarChartLowestQuarterlyReturnDate" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="BarChartLowestQuarterlyReturnDate" order="23.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_BarChartDoesNotReflectSalesLoads" xlink:label="BarChartDoesNotReflectSalesLoads" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="BarChartDoesNotReflectSalesLoads" order="8.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_BarChartReturnsForClassNotOfferedInProspectus" xlink:label="BarChartReturnsForClassNotOfferedInProspectus" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="BarChartReturnsForClassNotOfferedInProspectus" order="9.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_BarChartReasonSelectedClassDifferentFromImmediatelyPrecedingPeriod" xlink:label="BarChartReasonSelectedClassDifferentFromImmediatelyPrecedingPeriod" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="BarChartReasonSelectedClassDifferentFromImmediatelyPrecedingPeriod" order="10.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformancePastDoesNotIndicateFuture" xlink:label="PerformancePastDoesNotIndicateFuture" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformancePastDoesNotIndicateFuture" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceInformationIllustratesVariabilityOfReturns" xlink:label="PerformanceInformationIllustratesVariabilityOfReturns" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformanceInformationIllustratesVariabilityOfReturns" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceOneYearOrLess" xlink:label="PerformanceOneYearOrLess" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformanceOneYearOrLess" order="5.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceAdditionalMarketIndex" xlink:label="PerformanceAdditionalMarketIndex" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformanceAdditionalMarketIndex" order="6.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ClassAxis" xlink:label="ClassAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ClassAxis" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ShareClassDomain" xlink:label="ShareClassDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="ShareClassDomain" order="1.0" priority="1" />
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/4/role/InvestmentRisks" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:link="http://www.xbrl.org/2003/linkbase">
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusTable" xlink:label="ProspectusTable" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="DocumentInformationDocumentAxis" use="optional" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentDomain" xlink:label="DocumentDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="DocumentInformationDocumentAxis" xlink:to="DocumentDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="CoregistrantAxis" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AllCoregistrantsMember" xlink:label="AllCoregistrantsMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="CoregistrantAxis" xlink:to="AllCoregistrantsMember" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="LegalEntityAxis" use="optional" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityDomain" xlink:label="EntityDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="EntityDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusLineItems" xlink:label="ProspectusLineItems" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ProspectusLineItems" order="5.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_RiskTextBlock" xlink:label="RiskTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="RiskTextBlock" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_RiskAxis" xlink:label="RiskAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="RiskAxis" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AllRisksMember" xlink:label="AllRisksMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="RiskAxis" xlink:to="AllRisksMember" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_RiskLoseMoneyMember" xlink:label="RiskLoseMoneyMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="RiskAxis" xlink:to="RiskLoseMoneyMember" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_RiskNotInsuredDepositoryInstitutionMember" xlink:label="RiskNotInsuredDepositoryInstitutionMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="RiskAxis" xlink:to="RiskNotInsuredDepositoryInstitutionMember" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_RiskNotInsuredMember" xlink:label="RiskNotInsuredMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="RiskAxis" xlink:to="RiskNotInsuredMember" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_RiskNondiversifiedStatusMember" xlink:label="RiskNondiversifiedStatusMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="RiskAxis" xlink:to="RiskNondiversifiedStatusMember" order="5.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_RiskMoneyMarketFundPriceFluctuatesMember" xlink:label="RiskMoneyMarketFundPriceFluctuatesMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="RiskAxis" xlink:to="RiskMoneyMarketFundPriceFluctuatesMember" order="6.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_RiskMoneyMarketFundMayImposeFeesOrSuspendSalesMember" xlink:label="RiskMoneyMarketFundMayImposeFeesOrSuspendSalesMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="RiskAxis" xlink:to="RiskMoneyMarketFundMayImposeFeesOrSuspendSalesMember" order="7.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_RiskMoneyMarketFundMayNotPreserveDollarMember" xlink:label="RiskMoneyMarketFundMayNotPreserveDollarMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="RiskAxis" xlink:to="RiskMoneyMarketFundMayNotPreserveDollarMember" order="8.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_RiskMoneyMarketFundSponsorMayNotProvideSupportMember" xlink:label="RiskMoneyMarketFundSponsorMayNotProvideSupportMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="RiskAxis" xlink:to="RiskMoneyMarketFundSponsorMayNotProvideSupportMember" order="9.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_RisksAbstract" xlink:label="RisksAbstract" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="RisksAbstract" xlink:to="ProspectusTable" use="optional" order="1.0" priority="1" />
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/4/role/InvestmentStrategy" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:link="http://www.xbrl.org/2003/linkbase">
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_FormN1aAbstract" xlink:label="FormN1aAbstract" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusTable" xlink:label="ProspectusTable" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="FormN1aAbstract" xlink:to="ProspectusTable" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="DocumentInformationDocumentAxis" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentDomain" xlink:label="DocumentDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="DocumentInformationDocumentAxis" xlink:to="DocumentDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="CoregistrantAxis" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AllCoregistrantsMember" xlink:label="AllCoregistrantsMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="CoregistrantAxis" xlink:to="AllCoregistrantsMember" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="LegalEntityAxis" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityDomain" xlink:label="EntityDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="EntityDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusLineItems" xlink:label="ProspectusLineItems" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ProspectusLineItems" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_StrategyHeading" xlink:label="StrategyHeading" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="StrategyHeading" use="optional" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_StrategyNarrativeTextBlock" xlink:label="StrategyNarrativeTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="StrategyNarrativeTextBlock" use="optional" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_StrategyPortfolioConcentration" xlink:label="StrategyPortfolioConcentration" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="StrategyPortfolioConcentration" order="3.0" priority="1" />
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/4/role/FeesAndExpenses" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:link="http://www.xbrl.org/2003/linkbase">
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_FormN1aAbstract" xlink:label="FormN1aAbstract" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusTable" xlink:label="ProspectusTable" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="FormN1aAbstract" xlink:to="ProspectusTable" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="DocumentInformationDocumentAxis" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentDomain" xlink:label="DocumentDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="DocumentInformationDocumentAxis" xlink:to="DocumentDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="CoregistrantAxis" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AllCoregistrantsMember" xlink:label="AllCoregistrantsMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="CoregistrantAxis" xlink:to="AllCoregistrantsMember" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="LegalEntityAxis" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityDomain" xlink:label="EntityDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="EntityDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusLineItems" xlink:label="ProspectusLineItems" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ProspectusLineItems" order="5.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseHeading" xlink:label="ExpenseHeading" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseHeading" use="optional" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseNarrativeTextBlock" xlink:label="ExpenseNarrativeTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseNarrativeTextBlock" use="optional" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ShareholderFeesCaption" xlink:label="ShareholderFeesCaption" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ShareholderFeesCaption" use="optional" order="11.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_OperatingExpensesCaption" xlink:label="OperatingExpensesCaption" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="OperatingExpensesCaption" use="optional" order="13.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseFootnotesTextBlock" xlink:label="ExpenseFootnotesTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseFootnotesTextBlock" use="optional" order="15.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpensesDeferredChargesTextBlock" xlink:label="ExpensesDeferredChargesTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpensesDeferredChargesTextBlock" use="optional" order="16.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpensesRangeOfExchangeFeesTextBlock" xlink:label="ExpensesRangeOfExchangeFeesTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpensesRangeOfExchangeFeesTextBlock" use="optional" order="17.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleHeading" xlink:label="ExpenseExampleHeading" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleHeading" use="optional" order="18.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleByYearHeading" xlink:label="ExpenseExampleByYearHeading" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleByYearHeading" use="optional" order="19.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleNarrativeTextBlock" xlink:label="ExpenseExampleNarrativeTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleNarrativeTextBlock" use="optional" order="20.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleByYearCaption" xlink:label="ExpenseExampleByYearCaption" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleByYearCaption" use="optional" order="21.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleNoRedemptionNarrativeTextBlock" xlink:label="ExpenseExampleNoRedemptionNarrativeTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleNoRedemptionNarrativeTextBlock" use="optional" order="23.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleNoRedemptionByYearCaption" xlink:label="ExpenseExampleNoRedemptionByYearCaption" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleNoRedemptionByYearCaption" use="optional" order="24.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleFootnotesTextBlock" xlink:label="ExpenseExampleFootnotesTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleFootnotesTextBlock" use="optional" order="26.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleClosingTextBlock" xlink:label="ExpenseExampleClosingTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleClosingTextBlock" use="optional" order="27.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PortfolioTurnoverHeading" xlink:label="PortfolioTurnoverHeading" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PortfolioTurnoverHeading" use="optional" order="28.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PortfolioTurnoverTextBlock" xlink:label="PortfolioTurnoverTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PortfolioTurnoverTextBlock" use="optional" order="29.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ShareholderFeesTableTextBlock" xlink:label="ShareholderFeesTableTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ShareholderFeesTableTextBlock" use="optional" order="12.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AnnualFundOperatingExpensesTableTextBlock" xlink:label="AnnualFundOperatingExpensesTableTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="AnnualFundOperatingExpensesTableTextBlock" use="optional" order="14.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleWithRedemptionTableTextBlock" xlink:label="ExpenseExampleWithRedemptionTableTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleWithRedemptionTableTextBlock" use="optional" order="22.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleNoRedemptionTableTextBlock" xlink:label="ExpenseExampleNoRedemptionTableTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleNoRedemptionTableTextBlock" use="optional" order="25.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PortfolioTurnoverRate" xlink:label="PortfolioTurnoverRate" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PortfolioTurnoverRate" order="30.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseBreakpointDiscounts" xlink:label="ExpenseBreakpointDiscounts" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseBreakpointDiscounts" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpensesOtherExpensesHadExtraordinaryExpensesBeenIncluded" xlink:label="ExpensesOtherExpensesHadExtraordinaryExpensesBeenIncluded" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpensesOtherExpensesHadExtraordinaryExpensesBeenIncluded" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpensesRestatedToReflectCurrent" xlink:label="ExpensesRestatedToReflectCurrent" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpensesRestatedToReflectCurrent" order="5.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseBreakpointMinimumInvestmentRequiredAmount" xlink:label="ExpenseBreakpointMinimumInvestmentRequiredAmount" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseBreakpointMinimumInvestmentRequiredAmount" order="6.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_OtherExpensesNewFundBasedOnEstimates" xlink:label="OtherExpensesNewFundBasedOnEstimates" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="OtherExpensesNewFundBasedOnEstimates" order="7.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AcquiredFundFeesAndExpensesBasedOnEstimates" xlink:label="AcquiredFundFeesAndExpensesBasedOnEstimates" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="AcquiredFundFeesAndExpensesBasedOnEstimates" order="8.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpensesNotCorrelatedToRatioDueToAcquiredFundFees" xlink:label="ExpensesNotCorrelatedToRatioDueToAcquiredFundFees" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpensesNotCorrelatedToRatioDueToAcquiredFundFees" order="9.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpensesExplanationOfNonrecurringAccountFee" xlink:label="ExpensesExplanationOfNonrecurringAccountFee" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpensesExplanationOfNonrecurringAccountFee" order="10.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ClassAxis" xlink:label="ClassAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ClassAxis" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ShareClassDomain" xlink:label="ShareClassDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="ShareClassDomain" order="1.0" priority="1" />
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/4/role/N1aSupplement" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:link="http://www.xbrl.org/2003/linkbase">
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_FormN1aAbstract" xlink:label="FormN1aAbstract" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusTable" xlink:label="ProspectusTable" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="FormN1aAbstract" xlink:to="ProspectusTable" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="DocumentInformationDocumentAxis" use="optional" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentDomain" xlink:label="DocumentDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="DocumentInformationDocumentAxis" xlink:to="DocumentDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="CoregistrantAxis" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AllCoregistrantsMember" xlink:label="AllCoregistrantsMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="CoregistrantAxis" xlink:to="AllCoregistrantsMember" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="LegalEntityAxis" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityDomain" xlink:label="EntityDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="EntityDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusLineItems" xlink:label="ProspectusLineItems" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ProspectusLineItems" order="5.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_SupplementToProspectusTextBlock" xlink:label="SupplementToProspectusTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="SupplementToProspectusTextBlock" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ClassAxis" xlink:label="ClassAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ClassAxis" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ShareClassDomain" xlink:label="ShareClassDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="ShareClassDomain" order="1.0" priority="1" />
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/5/role/RiskReturn" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:link="http://www.xbrl.org/2003/linkbase">
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_FormN1aAbstract" xlink:label="FormN1aAbstract" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusTable" xlink:label="ProspectusTable" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="FormN1aAbstract" xlink:to="ProspectusTable" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="DocumentInformationDocumentAxis" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentDomain" xlink:label="DocumentDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="DocumentInformationDocumentAxis" xlink:to="DocumentDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="CoregistrantAxis" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AllCoregistrantsMember" xlink:label="AllCoregistrantsMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="CoregistrantAxis" xlink:to="AllCoregistrantsMember" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="LegalEntityAxis" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityDomain" xlink:label="EntityDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="EntityDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusLineItems" xlink:label="ProspectusLineItems" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ProspectusLineItems" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_RiskReturnHeading" xlink:label="RiskReturnHeading" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="RiskReturnHeading" use="optional" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ObjectiveHeading" xlink:label="ObjectiveHeading" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ObjectiveHeading" use="optional" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ObjectivePrimaryTextBlock" xlink:label="ObjectivePrimaryTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ObjectivePrimaryTextBlock" use="optional" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ObjectiveSecondaryTextBlock" xlink:label="ObjectiveSecondaryTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ObjectiveSecondaryTextBlock" use="optional" order="4.0" priority="1" />
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/5/role/ShareholderFeesData" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:link="http://www.xbrl.org/2003/linkbase">
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusTable" xlink:label="ProspectusTable" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="DocumentInformationDocumentAxis" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentDomain" xlink:label="DocumentDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="DocumentInformationDocumentAxis" xlink:to="DocumentDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="CoregistrantAxis" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AllCoregistrantsMember" xlink:label="AllCoregistrantsMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="CoregistrantAxis" xlink:to="AllCoregistrantsMember" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="LegalEntityAxis" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityDomain" xlink:label="EntityDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="EntityDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusLineItems" xlink:label="ProspectusLineItems" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ProspectusLineItems" order="5.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ShareholderFeesColumnName" xlink:label="ShareholderFeesColumnName" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ShareholderFeesColumnName" use="optional" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_MaximumCumulativeSalesChargeOverOfferingPrice" xlink:label="MaximumCumulativeSalesChargeOverOfferingPrice" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="MaximumCumulativeSalesChargeOverOfferingPrice" use="optional" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_MaximumCumulativeSalesChargeOverOther" xlink:label="MaximumCumulativeSalesChargeOverOther" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="MaximumCumulativeSalesChargeOverOther" use="optional" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice" xlink:label="MaximumSalesChargeImposedOnPurchasesOverOfferingPrice" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="MaximumSalesChargeImposedOnPurchasesOverOfferingPrice" use="optional" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_MaximumDeferredSalesChargeOverOfferingPrice" xlink:label="MaximumDeferredSalesChargeOverOfferingPrice" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="MaximumDeferredSalesChargeOverOfferingPrice" use="optional" order="5.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_MaximumDeferredSalesChargeOverOther" xlink:label="MaximumDeferredSalesChargeOverOther" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="MaximumDeferredSalesChargeOverOther" use="optional" order="6.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther" xlink:label="MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther" use="optional" order="7.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_RedemptionFeeOverRedemption" xlink:label="RedemptionFeeOverRedemption" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="RedemptionFeeOverRedemption" use="optional" order="8.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_RedemptionFee" xlink:label="RedemptionFee" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="RedemptionFee" use="optional" order="9.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExchangeFeeOverRedemption" xlink:label="ExchangeFeeOverRedemption" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExchangeFeeOverRedemption" use="optional" order="10.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExchangeFee" xlink:label="ExchangeFee" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExchangeFee" use="optional" order="11.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_MaximumAccountFeeOverAssets" xlink:label="MaximumAccountFeeOverAssets" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="MaximumAccountFeeOverAssets" use="optional" order="12.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_MaximumAccountFee" xlink:label="MaximumAccountFee" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="MaximumAccountFee" use="optional" order="13.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ShareholderFeeOther" xlink:label="ShareholderFeeOther" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ShareholderFeeOther" use="optional" order="14.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ClassAxis" xlink:label="ClassAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ClassAxis" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ShareClassDomain" xlink:label="ShareClassDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="ShareClassDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ShareholderFeesAbstract" xlink:label="ShareholderFeesAbstract" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ShareholderFeesAbstract" xlink:to="ProspectusTable" order="1.0" priority="1" />
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/5/role/OperatingExpensesData" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:link="http://www.xbrl.org/2003/linkbase">
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_FormN1aAbstract" xlink:label="FormN1aAbstract" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusTable" xlink:label="ProspectusTable" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="FormN1aAbstract" xlink:to="ProspectusTable" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="DocumentInformationDocumentAxis" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentDomain" xlink:label="DocumentDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="DocumentInformationDocumentAxis" xlink:to="DocumentDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="CoregistrantAxis" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AllCoregistrantsMember" xlink:label="AllCoregistrantsMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="CoregistrantAxis" xlink:to="AllCoregistrantsMember" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="LegalEntityAxis" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityDomain" xlink:label="EntityDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="EntityDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusLineItems" xlink:label="ProspectusLineItems" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ProspectusLineItems" order="5.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_OperatingExpensesColumnName" xlink:label="OperatingExpensesColumnName" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="OperatingExpensesColumnName" use="optional" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ManagementFeesOverAssets" xlink:label="ManagementFeesOverAssets" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ManagementFeesOverAssets" use="optional" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_DistributionAndService12b1FeesOverAssets" xlink:label="DistributionAndService12b1FeesOverAssets" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="DistributionAndService12b1FeesOverAssets" use="optional" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_DistributionOrSimilarNon12b1FeesOverAssets" xlink:label="DistributionOrSimilarNon12b1FeesOverAssets" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="DistributionOrSimilarNon12b1FeesOverAssets" use="optional" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_Component1OtherExpensesOverAssets" xlink:label="Component1OtherExpensesOverAssets" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="Component1OtherExpensesOverAssets" use="optional" order="5.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_Component2OtherExpensesOverAssets" xlink:label="Component2OtherExpensesOverAssets" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="Component2OtherExpensesOverAssets" use="optional" order="6.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_Component3OtherExpensesOverAssets" xlink:label="Component3OtherExpensesOverAssets" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="Component3OtherExpensesOverAssets" use="optional" order="7.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_OtherExpensesOverAssets" xlink:label="OtherExpensesOverAssets" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="OtherExpensesOverAssets" use="optional" order="8.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AcquiredFundFeesAndExpensesOverAssets" xlink:label="AcquiredFundFeesAndExpensesOverAssets" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="AcquiredFundFeesAndExpensesOverAssets" use="optional" order="9.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpensesOverAssets" xlink:label="ExpensesOverAssets" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpensesOverAssets" use="optional" order="10.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_FeeWaiverOrReimbursementOverAssets" xlink:label="FeeWaiverOrReimbursementOverAssets" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="FeeWaiverOrReimbursementOverAssets" use="optional" order="11.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_NetExpensesOverAssets" xlink:label="NetExpensesOverAssets" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="NetExpensesOverAssets" use="optional" order="12.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_FeeWaiverOrReimbursementOverAssetsDateOfTermination" xlink:label="FeeWaiverOrReimbursementOverAssetsDateOfTermination" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="FeeWaiverOrReimbursementOverAssetsDateOfTermination" order="13.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ClassAxis" xlink:label="ClassAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ClassAxis" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ShareClassDomain" xlink:label="ShareClassDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="ShareClassDomain" order="1.0" priority="1" />
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/5/role/ExpenseExample" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:link="http://www.xbrl.org/2003/linkbase">
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusTable" xlink:label="ProspectusTable" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="DocumentInformationDocumentAxis" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentDomain" xlink:label="DocumentDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="DocumentInformationDocumentAxis" xlink:to="DocumentDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="CoregistrantAxis" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AllCoregistrantsMember" xlink:label="AllCoregistrantsMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="CoregistrantAxis" xlink:to="AllCoregistrantsMember" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="LegalEntityAxis" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityDomain" xlink:label="EntityDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="EntityDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusLineItems" xlink:label="ProspectusLineItems" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ProspectusLineItems" order="5.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleByYearColumnName" xlink:label="ExpenseExampleByYearColumnName" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleByYearColumnName" use="optional" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleYear01" xlink:label="ExpenseExampleYear01" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleYear01" use="optional" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleYear03" xlink:label="ExpenseExampleYear03" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleYear03" use="optional" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleYear05" xlink:label="ExpenseExampleYear05" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleYear05" use="optional" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleYear10" xlink:label="ExpenseExampleYear10" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleYear10" use="optional" order="5.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ClassAxis" xlink:label="ClassAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ClassAxis" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ShareClassDomain" xlink:label="ShareClassDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="ShareClassDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleAbstract" xlink:label="ExpenseExampleAbstract" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ExpenseExampleAbstract" xlink:to="ProspectusTable" order="1.0" priority="1" />
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/5/role/ExpenseExampleNoRedemption" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:link="http://www.xbrl.org/2003/linkbase">
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusTable" xlink:label="ProspectusTable" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="DocumentInformationDocumentAxis" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentDomain" xlink:label="DocumentDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="DocumentInformationDocumentAxis" xlink:to="DocumentDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="CoregistrantAxis" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AllCoregistrantsMember" xlink:label="AllCoregistrantsMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="CoregistrantAxis" xlink:to="AllCoregistrantsMember" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="LegalEntityAxis" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityDomain" xlink:label="EntityDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="EntityDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusLineItems" xlink:label="ProspectusLineItems" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ProspectusLineItems" order="5.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleNoRedemptionByYearColumnName" xlink:label="ExpenseExampleNoRedemptionByYearColumnName" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleNoRedemptionByYearColumnName" use="optional" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleNoRedemptionYear01" xlink:label="ExpenseExampleNoRedemptionYear01" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleNoRedemptionYear01" use="optional" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleNoRedemptionYear03" xlink:label="ExpenseExampleNoRedemptionYear03" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleNoRedemptionYear03" use="optional" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleNoRedemptionYear05" xlink:label="ExpenseExampleNoRedemptionYear05" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleNoRedemptionYear05" use="optional" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleNoRedemptionYear10" xlink:label="ExpenseExampleNoRedemptionYear10" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleNoRedemptionYear10" use="optional" order="5.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ClassAxis" xlink:label="ClassAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ClassAxis" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ShareClassDomain" xlink:label="ShareClassDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="ShareClassDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleNoRedemptionAbstract" xlink:label="ExpenseExampleNoRedemptionAbstract" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ExpenseExampleNoRedemptionAbstract" xlink:to="ProspectusTable" order="1.0" priority="1" />
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/5/role/BarChartData" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:link="http://www.xbrl.org/2003/linkbase">
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusTable" xlink:label="ProspectusTable" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="DocumentInformationDocumentAxis" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentDomain" xlink:label="DocumentDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="DocumentInformationDocumentAxis" xlink:to="DocumentDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="CoregistrantAxis" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AllCoregistrantsMember" xlink:label="AllCoregistrantsMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="CoregistrantAxis" xlink:to="AllCoregistrantsMember" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="LegalEntityAxis" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityDomain" xlink:label="EntityDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="EntityDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusLineItems" xlink:label="ProspectusLineItems" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ProspectusLineItems" order="5.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AnnualReturnCaption" xlink:label="AnnualReturnCaption" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="AnnualReturnCaption" use="optional" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AnnualReturnColumnName" xlink:label="AnnualReturnColumnName" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="AnnualReturnColumnName" use="optional" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AnnualReturnInceptionDate" xlink:label="AnnualReturnInceptionDate" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="AnnualReturnInceptionDate" use="optional" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AnnlRtrPct" xlink:label="AnnlRtrPct" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="AnnlRtrPct" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ClassAxis" xlink:label="ClassAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ClassAxis" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ShareClassDomain" xlink:label="ShareClassDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="ShareClassDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_BarChartTableAbstract" xlink:label="BarChartTableAbstract" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="BarChartTableAbstract" xlink:to="ProspectusTable" order="1.0" priority="1" />
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/5/role/PerformanceTableData" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:link="http://www.xbrl.org/2003/linkbase">
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusTable" xlink:label="ProspectusTable" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="DocumentInformationDocumentAxis" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentDomain" xlink:label="DocumentDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="DocumentInformationDocumentAxis" xlink:to="DocumentDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="CoregistrantAxis" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AllCoregistrantsMember" xlink:label="AllCoregistrantsMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="CoregistrantAxis" xlink:to="AllCoregistrantsMember" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusLineItems" xlink:label="ProspectusLineItems" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ProspectusLineItems" order="5.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AverageAnnualReturnLabel" xlink:label="AverageAnnualReturnLabel" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="AverageAnnualReturnLabel" use="optional" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AvgAnnlRtrPct" xlink:label="AvgAnnlRtrPct" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="AvgAnnlRtrPct" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerfInceptionDate" xlink:label="PerfInceptionDate" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerfInceptionDate" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ClassAxis" xlink:label="ClassAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ClassAxis" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ShareClassDomain" xlink:label="ShareClassDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="ShareClassDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceMeasureAxis" xlink:label="PerformanceMeasureAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="PerformanceMeasureAxis" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceMeasureDomain" xlink:label="PerformanceMeasureDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="PerformanceMeasureAxis" xlink:to="PerformanceMeasureDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AfterTaxesOnDistributionsMember" xlink:label="AfterTaxesOnDistributionsMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="PerformanceMeasureDomain" xlink:to="AfterTaxesOnDistributionsMember" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AfterTaxesOnDistributionsAndSalesMember" xlink:label="AfterTaxesOnDistributionsAndSalesMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="PerformanceMeasureDomain" xlink:to="AfterTaxesOnDistributionsAndSalesMember" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AverageAnnualReturnAbstract" xlink:label="AverageAnnualReturnAbstract" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="AverageAnnualReturnAbstract" xlink:to="ProspectusTable" order="1.0" priority="1" />
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/5/role/N1aCover" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:link="http://www.xbrl.org/2003/linkbase">
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_FormN1aAbstract" xlink:label="FormN1aAbstract" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusTable" xlink:label="ProspectusTable" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="FormN1aAbstract" xlink:to="ProspectusTable" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="DocumentInformationDocumentAxis" use="optional" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentDomain" xlink:label="DocumentDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="DocumentInformationDocumentAxis" xlink:to="DocumentDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="CoregistrantAxis" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AllCoregistrantsMember" xlink:label="AllCoregistrantsMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="CoregistrantAxis" xlink:to="AllCoregistrantsMember" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusLineItems" xlink:label="ProspectusLineItems" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ProspectusLineItems" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentType" xlink:label="DocumentType" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="DocumentType" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_AmendmentFlag" xlink:label="AmendmentFlag" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="AmendmentFlag" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_AmendmentDescription" xlink:label="AmendmentDescription" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="AmendmentDescription" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityRegistrantName" xlink:label="EntityRegistrantName" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="EntityRegistrantName" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityCentralIndexKey" xlink:label="EntityCentralIndexKey" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="EntityCentralIndexKey" order="5.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityInvCompanyType" xlink:label="EntityInvCompanyType" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="EntityInvCompanyType" order="6.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentPeriodEndDate" xlink:label="DocumentPeriodEndDate" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="DocumentPeriodEndDate" order="7.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusDate" xlink:label="ProspectusDate" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ProspectusDate" order="8.0" priority="1" />
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/5/role/PerformanceManagement" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:link="http://www.xbrl.org/2003/linkbase">
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_FormN1aAbstract" xlink:label="FormN1aAbstract" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusTable" xlink:label="ProspectusTable" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="FormN1aAbstract" xlink:to="ProspectusTable" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="DocumentInformationDocumentAxis" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentDomain" xlink:label="DocumentDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="DocumentInformationDocumentAxis" xlink:to="DocumentDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="CoregistrantAxis" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AllCoregistrantsMember" xlink:label="AllCoregistrantsMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="CoregistrantAxis" xlink:to="AllCoregistrantsMember" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="LegalEntityAxis" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityDomain" xlink:label="EntityDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="EntityDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusLineItems" xlink:label="ProspectusLineItems" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ProspectusLineItems" order="5.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_BarChartAndPerformanceTableHeading" xlink:label="BarChartAndPerformanceTableHeading" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="BarChartAndPerformanceTableHeading" use="optional" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceNarrativeTextBlock" xlink:label="PerformanceNarrativeTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformanceNarrativeTextBlock" use="optional" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_BarChartNarrativeTextBlock" xlink:label="BarChartNarrativeTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="BarChartNarrativeTextBlock" use="optional" order="7.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_BarChartHeading" xlink:label="BarChartHeading" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="BarChartHeading" use="optional" order="11.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_BarChartFootnotesTextBlock" xlink:label="BarChartFootnotesTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="BarChartFootnotesTextBlock" use="optional" order="13.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_BarChartClosingTextBlock" xlink:label="BarChartClosingTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="BarChartClosingTextBlock" use="optional" order="14.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceTableHeading" xlink:label="PerformanceTableHeading" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformanceTableHeading" use="optional" order="24.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceTableNarrativeTextBlock" xlink:label="PerformanceTableNarrativeTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformanceTableNarrativeTextBlock" use="optional" order="25.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceTableClosingTextBlock" xlink:label="PerformanceTableClosingTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformanceTableClosingTextBlock" use="optional" order="39.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_BarChartTableTextBlock" xlink:label="BarChartTableTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="BarChartTableTextBlock" use="optional" order="12.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceTableTextBlock" xlink:label="PerformanceTableTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformanceTableTextBlock" use="optional" order="31.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_MarketIndexPerformanceTableTextBlock" xlink:label="MarketIndexPerformanceTableTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="MarketIndexPerformanceTableTextBlock" use="optional" order="34.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_MoneyMarketSevenDayYieldCaption" xlink:label="MoneyMarketSevenDayYieldCaption" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="MoneyMarketSevenDayYieldCaption" order="40.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_MoneyMarketSevenDayYieldColumnName" xlink:label="MoneyMarketSevenDayYieldColumnName" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="MoneyMarketSevenDayYieldColumnName" order="41.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_MoneyMarketSevenDayYieldPhone" xlink:label="MoneyMarketSevenDayYieldPhone" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="MoneyMarketSevenDayYieldPhone" order="42.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_MoneyMarketSevenDayYield" xlink:label="MoneyMarketSevenDayYield" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="MoneyMarketSevenDayYield" order="43.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_MoneyMarketSevenDayTaxEquivalentYield" xlink:label="MoneyMarketSevenDayTaxEquivalentYield" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="MoneyMarketSevenDayTaxEquivalentYield" order="44.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ThirtyDayYieldCaption" xlink:label="ThirtyDayYieldCaption" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ThirtyDayYieldCaption" order="45.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ThirtyDayYieldColumnName" xlink:label="ThirtyDayYieldColumnName" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ThirtyDayYieldColumnName" order="46.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ThirtyDayYieldPhone" xlink:label="ThirtyDayYieldPhone" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ThirtyDayYieldPhone" order="47.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ThirtyDayYield" xlink:label="ThirtyDayYield" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ThirtyDayYield" order="48.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ThirtyDayTaxEquivalentYield" xlink:label="ThirtyDayTaxEquivalentYield" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ThirtyDayTaxEquivalentYield" order="49.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceAvailabilityWebSiteAddress" xlink:label="PerformanceAvailabilityWebSiteAddress" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformanceAvailabilityWebSiteAddress" order="50.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceAvailabilityPhone" xlink:label="PerformanceAvailabilityPhone" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformanceAvailabilityPhone" order="51.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceTableFootnotesTextBlock" xlink:label="PerformanceTableFootnotesTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformanceTableFootnotesTextBlock" use="optional" order="35.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceTableFootnotesReasonPerformanceInformationForClassDifferentFromImmediatelyPrecedingPeriod" xlink:label="PerformanceTableFootnotesReasonPerformanceInformationForClassDifferentFromImmediatelyPrecedingPeriod" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformanceTableFootnotesReasonPerformanceInformationForClassDifferentFromImmediatelyPrecedingPeriod" order="36.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceTableOneClassOfAfterTaxShown" xlink:label="PerformanceTableOneClassOfAfterTaxShown" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformanceTableOneClassOfAfterTaxShown" order="37.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_IndexNoDeductionForFeesExpensesTaxes" xlink:label="IndexNoDeductionForFeesExpensesTaxes" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="IndexNoDeductionForFeesExpensesTaxes" order="38.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AverageAnnualReturnCaption" xlink:label="AverageAnnualReturnCaption" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="AverageAnnualReturnCaption" order="32.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AverageAnnualReturnColumnName" xlink:label="AverageAnnualReturnColumnName" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="AverageAnnualReturnColumnName" order="33.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceTableDoesReflectSalesLoads" xlink:label="PerformanceTableDoesReflectSalesLoads" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformanceTableDoesReflectSalesLoads" order="26.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceTableMarketIndexChanged" xlink:label="PerformanceTableMarketIndexChanged" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformanceTableMarketIndexChanged" order="27.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceTableUsesHighestFederalRate" xlink:label="PerformanceTableUsesHighestFederalRate" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformanceTableUsesHighestFederalRate" order="28.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceTableNotRelevantToTaxDeferred" xlink:label="PerformanceTableNotRelevantToTaxDeferred" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformanceTableNotRelevantToTaxDeferred" order="29.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceTableExplanationAfterTaxHigher" xlink:label="PerformanceTableExplanationAfterTaxHigher" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformanceTableExplanationAfterTaxHigher" order="30.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_YearToDateReturnLabel" xlink:label="YearToDateReturnLabel" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="YearToDateReturnLabel" order="15.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_BarChartYearToDateReturn" xlink:label="BarChartYearToDateReturn" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="BarChartYearToDateReturn" order="16.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_BarChartYearToDateReturnDate" xlink:label="BarChartYearToDateReturnDate" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="BarChartYearToDateReturnDate" order="17.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_HighestQuarterlyReturnLabel" xlink:label="HighestQuarterlyReturnLabel" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="HighestQuarterlyReturnLabel" order="18.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_BarChartHighestQuarterlyReturn" xlink:label="BarChartHighestQuarterlyReturn" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="BarChartHighestQuarterlyReturn" order="19.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_BarChartHighestQuarterlyReturnDate" xlink:label="BarChartHighestQuarterlyReturnDate" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="BarChartHighestQuarterlyReturnDate" order="20.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_LowestQuarterlyReturnLabel" xlink:label="LowestQuarterlyReturnLabel" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="LowestQuarterlyReturnLabel" order="21.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_BarChartLowestQuarterlyReturn" xlink:label="BarChartLowestQuarterlyReturn" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="BarChartLowestQuarterlyReturn" order="22.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_BarChartLowestQuarterlyReturnDate" xlink:label="BarChartLowestQuarterlyReturnDate" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="BarChartLowestQuarterlyReturnDate" order="23.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_BarChartDoesNotReflectSalesLoads" xlink:label="BarChartDoesNotReflectSalesLoads" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="BarChartDoesNotReflectSalesLoads" order="8.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_BarChartReturnsForClassNotOfferedInProspectus" xlink:label="BarChartReturnsForClassNotOfferedInProspectus" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="BarChartReturnsForClassNotOfferedInProspectus" order="9.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_BarChartReasonSelectedClassDifferentFromImmediatelyPrecedingPeriod" xlink:label="BarChartReasonSelectedClassDifferentFromImmediatelyPrecedingPeriod" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="BarChartReasonSelectedClassDifferentFromImmediatelyPrecedingPeriod" order="10.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformancePastDoesNotIndicateFuture" xlink:label="PerformancePastDoesNotIndicateFuture" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformancePastDoesNotIndicateFuture" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceInformationIllustratesVariabilityOfReturns" xlink:label="PerformanceInformationIllustratesVariabilityOfReturns" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformanceInformationIllustratesVariabilityOfReturns" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceOneYearOrLess" xlink:label="PerformanceOneYearOrLess" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformanceOneYearOrLess" order="5.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceAdditionalMarketIndex" xlink:label="PerformanceAdditionalMarketIndex" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformanceAdditionalMarketIndex" order="6.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ClassAxis" xlink:label="ClassAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ClassAxis" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ShareClassDomain" xlink:label="ShareClassDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="ShareClassDomain" order="1.0" priority="1" />
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/5/role/InvestmentRisks" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:link="http://www.xbrl.org/2003/linkbase">
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusTable" xlink:label="ProspectusTable" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="DocumentInformationDocumentAxis" use="optional" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentDomain" xlink:label="DocumentDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="DocumentInformationDocumentAxis" xlink:to="DocumentDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="CoregistrantAxis" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AllCoregistrantsMember" xlink:label="AllCoregistrantsMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="CoregistrantAxis" xlink:to="AllCoregistrantsMember" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="LegalEntityAxis" use="optional" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityDomain" xlink:label="EntityDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="EntityDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusLineItems" xlink:label="ProspectusLineItems" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ProspectusLineItems" order="5.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_RiskTextBlock" xlink:label="RiskTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="RiskTextBlock" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_RiskAxis" xlink:label="RiskAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="RiskAxis" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AllRisksMember" xlink:label="AllRisksMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="RiskAxis" xlink:to="AllRisksMember" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_RiskLoseMoneyMember" xlink:label="RiskLoseMoneyMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="RiskAxis" xlink:to="RiskLoseMoneyMember" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_RiskNotInsuredDepositoryInstitutionMember" xlink:label="RiskNotInsuredDepositoryInstitutionMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="RiskAxis" xlink:to="RiskNotInsuredDepositoryInstitutionMember" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_RiskNotInsuredMember" xlink:label="RiskNotInsuredMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="RiskAxis" xlink:to="RiskNotInsuredMember" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_RiskNondiversifiedStatusMember" xlink:label="RiskNondiversifiedStatusMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="RiskAxis" xlink:to="RiskNondiversifiedStatusMember" order="5.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_RiskMoneyMarketFundPriceFluctuatesMember" xlink:label="RiskMoneyMarketFundPriceFluctuatesMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="RiskAxis" xlink:to="RiskMoneyMarketFundPriceFluctuatesMember" order="6.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_RiskMoneyMarketFundMayImposeFeesOrSuspendSalesMember" xlink:label="RiskMoneyMarketFundMayImposeFeesOrSuspendSalesMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="RiskAxis" xlink:to="RiskMoneyMarketFundMayImposeFeesOrSuspendSalesMember" order="7.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_RiskMoneyMarketFundMayNotPreserveDollarMember" xlink:label="RiskMoneyMarketFundMayNotPreserveDollarMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="RiskAxis" xlink:to="RiskMoneyMarketFundMayNotPreserveDollarMember" order="8.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_RiskMoneyMarketFundSponsorMayNotProvideSupportMember" xlink:label="RiskMoneyMarketFundSponsorMayNotProvideSupportMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="RiskAxis" xlink:to="RiskMoneyMarketFundSponsorMayNotProvideSupportMember" order="9.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_RisksAbstract" xlink:label="RisksAbstract" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="RisksAbstract" xlink:to="ProspectusTable" use="optional" order="1.0" priority="1" />
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/5/role/InvestmentStrategy" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:link="http://www.xbrl.org/2003/linkbase">
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_FormN1aAbstract" xlink:label="FormN1aAbstract" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusTable" xlink:label="ProspectusTable" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="FormN1aAbstract" xlink:to="ProspectusTable" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="DocumentInformationDocumentAxis" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentDomain" xlink:label="DocumentDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="DocumentInformationDocumentAxis" xlink:to="DocumentDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="CoregistrantAxis" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AllCoregistrantsMember" xlink:label="AllCoregistrantsMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="CoregistrantAxis" xlink:to="AllCoregistrantsMember" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="LegalEntityAxis" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityDomain" xlink:label="EntityDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="EntityDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusLineItems" xlink:label="ProspectusLineItems" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ProspectusLineItems" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_StrategyHeading" xlink:label="StrategyHeading" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="StrategyHeading" use="optional" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_StrategyNarrativeTextBlock" xlink:label="StrategyNarrativeTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="StrategyNarrativeTextBlock" use="optional" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_StrategyPortfolioConcentration" xlink:label="StrategyPortfolioConcentration" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="StrategyPortfolioConcentration" order="3.0" priority="1" />
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/5/role/FeesAndExpenses" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:link="http://www.xbrl.org/2003/linkbase">
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_FormN1aAbstract" xlink:label="FormN1aAbstract" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusTable" xlink:label="ProspectusTable" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="FormN1aAbstract" xlink:to="ProspectusTable" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="DocumentInformationDocumentAxis" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentDomain" xlink:label="DocumentDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="DocumentInformationDocumentAxis" xlink:to="DocumentDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="CoregistrantAxis" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AllCoregistrantsMember" xlink:label="AllCoregistrantsMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="CoregistrantAxis" xlink:to="AllCoregistrantsMember" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="LegalEntityAxis" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityDomain" xlink:label="EntityDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="EntityDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusLineItems" xlink:label="ProspectusLineItems" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ProspectusLineItems" order="5.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseHeading" xlink:label="ExpenseHeading" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseHeading" use="optional" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseNarrativeTextBlock" xlink:label="ExpenseNarrativeTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseNarrativeTextBlock" use="optional" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ShareholderFeesCaption" xlink:label="ShareholderFeesCaption" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ShareholderFeesCaption" use="optional" order="11.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_OperatingExpensesCaption" xlink:label="OperatingExpensesCaption" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="OperatingExpensesCaption" use="optional" order="13.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseFootnotesTextBlock" xlink:label="ExpenseFootnotesTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseFootnotesTextBlock" use="optional" order="15.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpensesDeferredChargesTextBlock" xlink:label="ExpensesDeferredChargesTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpensesDeferredChargesTextBlock" use="optional" order="16.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpensesRangeOfExchangeFeesTextBlock" xlink:label="ExpensesRangeOfExchangeFeesTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpensesRangeOfExchangeFeesTextBlock" use="optional" order="17.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleHeading" xlink:label="ExpenseExampleHeading" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleHeading" use="optional" order="18.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleByYearHeading" xlink:label="ExpenseExampleByYearHeading" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleByYearHeading" use="optional" order="19.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleNarrativeTextBlock" xlink:label="ExpenseExampleNarrativeTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleNarrativeTextBlock" use="optional" order="20.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleByYearCaption" xlink:label="ExpenseExampleByYearCaption" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleByYearCaption" use="optional" order="21.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleNoRedemptionNarrativeTextBlock" xlink:label="ExpenseExampleNoRedemptionNarrativeTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleNoRedemptionNarrativeTextBlock" use="optional" order="23.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleNoRedemptionByYearCaption" xlink:label="ExpenseExampleNoRedemptionByYearCaption" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleNoRedemptionByYearCaption" use="optional" order="24.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleFootnotesTextBlock" xlink:label="ExpenseExampleFootnotesTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleFootnotesTextBlock" use="optional" order="26.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleClosingTextBlock" xlink:label="ExpenseExampleClosingTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleClosingTextBlock" use="optional" order="27.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PortfolioTurnoverHeading" xlink:label="PortfolioTurnoverHeading" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PortfolioTurnoverHeading" use="optional" order="28.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PortfolioTurnoverTextBlock" xlink:label="PortfolioTurnoverTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PortfolioTurnoverTextBlock" use="optional" order="29.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ShareholderFeesTableTextBlock" xlink:label="ShareholderFeesTableTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ShareholderFeesTableTextBlock" use="optional" order="12.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AnnualFundOperatingExpensesTableTextBlock" xlink:label="AnnualFundOperatingExpensesTableTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="AnnualFundOperatingExpensesTableTextBlock" use="optional" order="14.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleWithRedemptionTableTextBlock" xlink:label="ExpenseExampleWithRedemptionTableTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleWithRedemptionTableTextBlock" use="optional" order="22.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleNoRedemptionTableTextBlock" xlink:label="ExpenseExampleNoRedemptionTableTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleNoRedemptionTableTextBlock" use="optional" order="25.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PortfolioTurnoverRate" xlink:label="PortfolioTurnoverRate" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PortfolioTurnoverRate" order="30.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseBreakpointDiscounts" xlink:label="ExpenseBreakpointDiscounts" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseBreakpointDiscounts" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpensesOtherExpensesHadExtraordinaryExpensesBeenIncluded" xlink:label="ExpensesOtherExpensesHadExtraordinaryExpensesBeenIncluded" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpensesOtherExpensesHadExtraordinaryExpensesBeenIncluded" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpensesRestatedToReflectCurrent" xlink:label="ExpensesRestatedToReflectCurrent" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpensesRestatedToReflectCurrent" order="5.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseBreakpointMinimumInvestmentRequiredAmount" xlink:label="ExpenseBreakpointMinimumInvestmentRequiredAmount" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseBreakpointMinimumInvestmentRequiredAmount" order="6.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_OtherExpensesNewFundBasedOnEstimates" xlink:label="OtherExpensesNewFundBasedOnEstimates" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="OtherExpensesNewFundBasedOnEstimates" order="7.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AcquiredFundFeesAndExpensesBasedOnEstimates" xlink:label="AcquiredFundFeesAndExpensesBasedOnEstimates" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="AcquiredFundFeesAndExpensesBasedOnEstimates" order="8.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpensesNotCorrelatedToRatioDueToAcquiredFundFees" xlink:label="ExpensesNotCorrelatedToRatioDueToAcquiredFundFees" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpensesNotCorrelatedToRatioDueToAcquiredFundFees" order="9.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpensesExplanationOfNonrecurringAccountFee" xlink:label="ExpensesExplanationOfNonrecurringAccountFee" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpensesExplanationOfNonrecurringAccountFee" order="10.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ClassAxis" xlink:label="ClassAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ClassAxis" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ShareClassDomain" xlink:label="ShareClassDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="ShareClassDomain" order="1.0" priority="1" />
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/5/role/N1aSupplement" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:link="http://www.xbrl.org/2003/linkbase">
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_FormN1aAbstract" xlink:label="FormN1aAbstract" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusTable" xlink:label="ProspectusTable" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="FormN1aAbstract" xlink:to="ProspectusTable" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="DocumentInformationDocumentAxis" use="optional" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentDomain" xlink:label="DocumentDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="DocumentInformationDocumentAxis" xlink:to="DocumentDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="CoregistrantAxis" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AllCoregistrantsMember" xlink:label="AllCoregistrantsMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="CoregistrantAxis" xlink:to="AllCoregistrantsMember" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="LegalEntityAxis" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityDomain" xlink:label="EntityDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="EntityDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusLineItems" xlink:label="ProspectusLineItems" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ProspectusLineItems" order="5.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_SupplementToProspectusTextBlock" xlink:label="SupplementToProspectusTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="SupplementToProspectusTextBlock" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ClassAxis" xlink:label="ClassAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ClassAxis" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ShareClassDomain" xlink:label="ShareClassDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="ShareClassDomain" order="1.0" priority="1" />
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/6/role/RiskReturn" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:link="http://www.xbrl.org/2003/linkbase">
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_FormN1aAbstract" xlink:label="FormN1aAbstract" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusTable" xlink:label="ProspectusTable" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="FormN1aAbstract" xlink:to="ProspectusTable" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="DocumentInformationDocumentAxis" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentDomain" xlink:label="DocumentDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="DocumentInformationDocumentAxis" xlink:to="DocumentDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="CoregistrantAxis" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AllCoregistrantsMember" xlink:label="AllCoregistrantsMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="CoregistrantAxis" xlink:to="AllCoregistrantsMember" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="LegalEntityAxis" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityDomain" xlink:label="EntityDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="EntityDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusLineItems" xlink:label="ProspectusLineItems" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ProspectusLineItems" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_RiskReturnHeading" xlink:label="RiskReturnHeading" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="RiskReturnHeading" use="optional" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ObjectiveHeading" xlink:label="ObjectiveHeading" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ObjectiveHeading" use="optional" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ObjectivePrimaryTextBlock" xlink:label="ObjectivePrimaryTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ObjectivePrimaryTextBlock" use="optional" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ObjectiveSecondaryTextBlock" xlink:label="ObjectiveSecondaryTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ObjectiveSecondaryTextBlock" use="optional" order="4.0" priority="1" />
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/6/role/ShareholderFeesData" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:link="http://www.xbrl.org/2003/linkbase">
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusTable" xlink:label="ProspectusTable" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="DocumentInformationDocumentAxis" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentDomain" xlink:label="DocumentDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="DocumentInformationDocumentAxis" xlink:to="DocumentDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="CoregistrantAxis" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AllCoregistrantsMember" xlink:label="AllCoregistrantsMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="CoregistrantAxis" xlink:to="AllCoregistrantsMember" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="LegalEntityAxis" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityDomain" xlink:label="EntityDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="EntityDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusLineItems" xlink:label="ProspectusLineItems" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ProspectusLineItems" order="5.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ShareholderFeesColumnName" xlink:label="ShareholderFeesColumnName" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ShareholderFeesColumnName" use="optional" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_MaximumCumulativeSalesChargeOverOfferingPrice" xlink:label="MaximumCumulativeSalesChargeOverOfferingPrice" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="MaximumCumulativeSalesChargeOverOfferingPrice" use="optional" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_MaximumCumulativeSalesChargeOverOther" xlink:label="MaximumCumulativeSalesChargeOverOther" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="MaximumCumulativeSalesChargeOverOther" use="optional" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice" xlink:label="MaximumSalesChargeImposedOnPurchasesOverOfferingPrice" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="MaximumSalesChargeImposedOnPurchasesOverOfferingPrice" use="optional" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_MaximumDeferredSalesChargeOverOfferingPrice" xlink:label="MaximumDeferredSalesChargeOverOfferingPrice" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="MaximumDeferredSalesChargeOverOfferingPrice" use="optional" order="5.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_MaximumDeferredSalesChargeOverOther" xlink:label="MaximumDeferredSalesChargeOverOther" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="MaximumDeferredSalesChargeOverOther" use="optional" order="6.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther" xlink:label="MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther" use="optional" order="7.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_RedemptionFeeOverRedemption" xlink:label="RedemptionFeeOverRedemption" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="RedemptionFeeOverRedemption" use="optional" order="8.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_RedemptionFee" xlink:label="RedemptionFee" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="RedemptionFee" use="optional" order="9.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExchangeFeeOverRedemption" xlink:label="ExchangeFeeOverRedemption" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExchangeFeeOverRedemption" use="optional" order="10.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExchangeFee" xlink:label="ExchangeFee" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExchangeFee" use="optional" order="11.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_MaximumAccountFeeOverAssets" xlink:label="MaximumAccountFeeOverAssets" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="MaximumAccountFeeOverAssets" use="optional" order="12.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_MaximumAccountFee" xlink:label="MaximumAccountFee" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="MaximumAccountFee" use="optional" order="13.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ShareholderFeeOther" xlink:label="ShareholderFeeOther" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ShareholderFeeOther" use="optional" order="14.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ClassAxis" xlink:label="ClassAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ClassAxis" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ShareClassDomain" xlink:label="ShareClassDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="ShareClassDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ShareholderFeesAbstract" xlink:label="ShareholderFeesAbstract" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ShareholderFeesAbstract" xlink:to="ProspectusTable" order="1.0" priority="1" />
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/6/role/OperatingExpensesData" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:link="http://www.xbrl.org/2003/linkbase">
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_FormN1aAbstract" xlink:label="FormN1aAbstract" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusTable" xlink:label="ProspectusTable" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="FormN1aAbstract" xlink:to="ProspectusTable" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="DocumentInformationDocumentAxis" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentDomain" xlink:label="DocumentDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="DocumentInformationDocumentAxis" xlink:to="DocumentDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="CoregistrantAxis" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AllCoregistrantsMember" xlink:label="AllCoregistrantsMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="CoregistrantAxis" xlink:to="AllCoregistrantsMember" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="LegalEntityAxis" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityDomain" xlink:label="EntityDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="EntityDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusLineItems" xlink:label="ProspectusLineItems" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ProspectusLineItems" order="5.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_OperatingExpensesColumnName" xlink:label="OperatingExpensesColumnName" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="OperatingExpensesColumnName" use="optional" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ManagementFeesOverAssets" xlink:label="ManagementFeesOverAssets" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ManagementFeesOverAssets" use="optional" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_DistributionAndService12b1FeesOverAssets" xlink:label="DistributionAndService12b1FeesOverAssets" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="DistributionAndService12b1FeesOverAssets" use="optional" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_DistributionOrSimilarNon12b1FeesOverAssets" xlink:label="DistributionOrSimilarNon12b1FeesOverAssets" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="DistributionOrSimilarNon12b1FeesOverAssets" use="optional" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_Component1OtherExpensesOverAssets" xlink:label="Component1OtherExpensesOverAssets" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="Component1OtherExpensesOverAssets" use="optional" order="5.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_Component2OtherExpensesOverAssets" xlink:label="Component2OtherExpensesOverAssets" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="Component2OtherExpensesOverAssets" use="optional" order="6.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_Component3OtherExpensesOverAssets" xlink:label="Component3OtherExpensesOverAssets" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="Component3OtherExpensesOverAssets" use="optional" order="7.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_OtherExpensesOverAssets" xlink:label="OtherExpensesOverAssets" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="OtherExpensesOverAssets" use="optional" order="8.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AcquiredFundFeesAndExpensesOverAssets" xlink:label="AcquiredFundFeesAndExpensesOverAssets" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="AcquiredFundFeesAndExpensesOverAssets" use="optional" order="9.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpensesOverAssets" xlink:label="ExpensesOverAssets" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpensesOverAssets" use="optional" order="10.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_FeeWaiverOrReimbursementOverAssets" xlink:label="FeeWaiverOrReimbursementOverAssets" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="FeeWaiverOrReimbursementOverAssets" use="optional" order="11.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_NetExpensesOverAssets" xlink:label="NetExpensesOverAssets" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="NetExpensesOverAssets" use="optional" order="12.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_FeeWaiverOrReimbursementOverAssetsDateOfTermination" xlink:label="FeeWaiverOrReimbursementOverAssetsDateOfTermination" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="FeeWaiverOrReimbursementOverAssetsDateOfTermination" order="13.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ClassAxis" xlink:label="ClassAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ClassAxis" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ShareClassDomain" xlink:label="ShareClassDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="ShareClassDomain" order="1.0" priority="1" />
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/6/role/ExpenseExample" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:link="http://www.xbrl.org/2003/linkbase">
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusTable" xlink:label="ProspectusTable" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="DocumentInformationDocumentAxis" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentDomain" xlink:label="DocumentDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="DocumentInformationDocumentAxis" xlink:to="DocumentDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="CoregistrantAxis" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AllCoregistrantsMember" xlink:label="AllCoregistrantsMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="CoregistrantAxis" xlink:to="AllCoregistrantsMember" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="LegalEntityAxis" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityDomain" xlink:label="EntityDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="EntityDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusLineItems" xlink:label="ProspectusLineItems" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ProspectusLineItems" order="5.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleByYearColumnName" xlink:label="ExpenseExampleByYearColumnName" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleByYearColumnName" use="optional" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleYear01" xlink:label="ExpenseExampleYear01" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleYear01" use="optional" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleYear03" xlink:label="ExpenseExampleYear03" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleYear03" use="optional" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleYear05" xlink:label="ExpenseExampleYear05" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleYear05" use="optional" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleYear10" xlink:label="ExpenseExampleYear10" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleYear10" use="optional" order="5.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ClassAxis" xlink:label="ClassAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ClassAxis" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ShareClassDomain" xlink:label="ShareClassDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="ShareClassDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleAbstract" xlink:label="ExpenseExampleAbstract" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ExpenseExampleAbstract" xlink:to="ProspectusTable" order="1.0" priority="1" />
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/6/role/ExpenseExampleNoRedemption" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:link="http://www.xbrl.org/2003/linkbase">
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusTable" xlink:label="ProspectusTable" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="DocumentInformationDocumentAxis" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentDomain" xlink:label="DocumentDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="DocumentInformationDocumentAxis" xlink:to="DocumentDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="CoregistrantAxis" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AllCoregistrantsMember" xlink:label="AllCoregistrantsMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="CoregistrantAxis" xlink:to="AllCoregistrantsMember" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="LegalEntityAxis" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityDomain" xlink:label="EntityDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="EntityDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusLineItems" xlink:label="ProspectusLineItems" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ProspectusLineItems" order="5.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleNoRedemptionByYearColumnName" xlink:label="ExpenseExampleNoRedemptionByYearColumnName" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleNoRedemptionByYearColumnName" use="optional" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleNoRedemptionYear01" xlink:label="ExpenseExampleNoRedemptionYear01" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleNoRedemptionYear01" use="optional" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleNoRedemptionYear03" xlink:label="ExpenseExampleNoRedemptionYear03" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleNoRedemptionYear03" use="optional" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleNoRedemptionYear05" xlink:label="ExpenseExampleNoRedemptionYear05" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleNoRedemptionYear05" use="optional" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleNoRedemptionYear10" xlink:label="ExpenseExampleNoRedemptionYear10" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleNoRedemptionYear10" use="optional" order="5.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ClassAxis" xlink:label="ClassAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ClassAxis" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ShareClassDomain" xlink:label="ShareClassDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="ShareClassDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleNoRedemptionAbstract" xlink:label="ExpenseExampleNoRedemptionAbstract" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ExpenseExampleNoRedemptionAbstract" xlink:to="ProspectusTable" order="1.0" priority="1" />
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/6/role/BarChartData" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:link="http://www.xbrl.org/2003/linkbase">
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusTable" xlink:label="ProspectusTable" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="DocumentInformationDocumentAxis" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentDomain" xlink:label="DocumentDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="DocumentInformationDocumentAxis" xlink:to="DocumentDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="CoregistrantAxis" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AllCoregistrantsMember" xlink:label="AllCoregistrantsMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="CoregistrantAxis" xlink:to="AllCoregistrantsMember" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="LegalEntityAxis" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityDomain" xlink:label="EntityDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="EntityDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusLineItems" xlink:label="ProspectusLineItems" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ProspectusLineItems" order="5.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AnnualReturnCaption" xlink:label="AnnualReturnCaption" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="AnnualReturnCaption" use="optional" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AnnualReturnColumnName" xlink:label="AnnualReturnColumnName" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="AnnualReturnColumnName" use="optional" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AnnualReturnInceptionDate" xlink:label="AnnualReturnInceptionDate" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="AnnualReturnInceptionDate" use="optional" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AnnlRtrPct" xlink:label="AnnlRtrPct" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="AnnlRtrPct" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ClassAxis" xlink:label="ClassAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ClassAxis" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ShareClassDomain" xlink:label="ShareClassDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="ShareClassDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_BarChartTableAbstract" xlink:label="BarChartTableAbstract" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="BarChartTableAbstract" xlink:to="ProspectusTable" order="1.0" priority="1" />
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/6/role/PerformanceTableData" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:link="http://www.xbrl.org/2003/linkbase">
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusTable" xlink:label="ProspectusTable" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="DocumentInformationDocumentAxis" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentDomain" xlink:label="DocumentDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="DocumentInformationDocumentAxis" xlink:to="DocumentDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="CoregistrantAxis" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AllCoregistrantsMember" xlink:label="AllCoregistrantsMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="CoregistrantAxis" xlink:to="AllCoregistrantsMember" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusLineItems" xlink:label="ProspectusLineItems" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ProspectusLineItems" order="5.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AverageAnnualReturnLabel" xlink:label="AverageAnnualReturnLabel" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="AverageAnnualReturnLabel" use="optional" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AvgAnnlRtrPct" xlink:label="AvgAnnlRtrPct" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="AvgAnnlRtrPct" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerfInceptionDate" xlink:label="PerfInceptionDate" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerfInceptionDate" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ClassAxis" xlink:label="ClassAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ClassAxis" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ShareClassDomain" xlink:label="ShareClassDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="ShareClassDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceMeasureAxis" xlink:label="PerformanceMeasureAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="PerformanceMeasureAxis" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceMeasureDomain" xlink:label="PerformanceMeasureDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="PerformanceMeasureAxis" xlink:to="PerformanceMeasureDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AfterTaxesOnDistributionsMember" xlink:label="AfterTaxesOnDistributionsMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="PerformanceMeasureDomain" xlink:to="AfterTaxesOnDistributionsMember" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AfterTaxesOnDistributionsAndSalesMember" xlink:label="AfterTaxesOnDistributionsAndSalesMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="PerformanceMeasureDomain" xlink:to="AfterTaxesOnDistributionsAndSalesMember" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AverageAnnualReturnAbstract" xlink:label="AverageAnnualReturnAbstract" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="AverageAnnualReturnAbstract" xlink:to="ProspectusTable" order="1.0" priority="1" />
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/6/role/N1aCover" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:link="http://www.xbrl.org/2003/linkbase">
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_FormN1aAbstract" xlink:label="FormN1aAbstract" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusTable" xlink:label="ProspectusTable" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="FormN1aAbstract" xlink:to="ProspectusTable" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="DocumentInformationDocumentAxis" use="optional" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentDomain" xlink:label="DocumentDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="DocumentInformationDocumentAxis" xlink:to="DocumentDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="CoregistrantAxis" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AllCoregistrantsMember" xlink:label="AllCoregistrantsMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="CoregistrantAxis" xlink:to="AllCoregistrantsMember" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusLineItems" xlink:label="ProspectusLineItems" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ProspectusLineItems" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentType" xlink:label="DocumentType" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="DocumentType" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_AmendmentFlag" xlink:label="AmendmentFlag" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="AmendmentFlag" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_AmendmentDescription" xlink:label="AmendmentDescription" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="AmendmentDescription" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityRegistrantName" xlink:label="EntityRegistrantName" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="EntityRegistrantName" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityCentralIndexKey" xlink:label="EntityCentralIndexKey" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="EntityCentralIndexKey" order="5.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityInvCompanyType" xlink:label="EntityInvCompanyType" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="EntityInvCompanyType" order="6.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentPeriodEndDate" xlink:label="DocumentPeriodEndDate" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="DocumentPeriodEndDate" order="7.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusDate" xlink:label="ProspectusDate" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ProspectusDate" order="8.0" priority="1" />
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/6/role/PerformanceManagement" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:link="http://www.xbrl.org/2003/linkbase">
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_FormN1aAbstract" xlink:label="FormN1aAbstract" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusTable" xlink:label="ProspectusTable" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="FormN1aAbstract" xlink:to="ProspectusTable" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="DocumentInformationDocumentAxis" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentDomain" xlink:label="DocumentDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="DocumentInformationDocumentAxis" xlink:to="DocumentDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="CoregistrantAxis" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AllCoregistrantsMember" xlink:label="AllCoregistrantsMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="CoregistrantAxis" xlink:to="AllCoregistrantsMember" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="LegalEntityAxis" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityDomain" xlink:label="EntityDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="EntityDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusLineItems" xlink:label="ProspectusLineItems" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ProspectusLineItems" order="5.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_BarChartAndPerformanceTableHeading" xlink:label="BarChartAndPerformanceTableHeading" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="BarChartAndPerformanceTableHeading" use="optional" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceNarrativeTextBlock" xlink:label="PerformanceNarrativeTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformanceNarrativeTextBlock" use="optional" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_BarChartNarrativeTextBlock" xlink:label="BarChartNarrativeTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="BarChartNarrativeTextBlock" use="optional" order="7.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_BarChartHeading" xlink:label="BarChartHeading" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="BarChartHeading" use="optional" order="11.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_BarChartFootnotesTextBlock" xlink:label="BarChartFootnotesTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="BarChartFootnotesTextBlock" use="optional" order="13.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_BarChartClosingTextBlock" xlink:label="BarChartClosingTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="BarChartClosingTextBlock" use="optional" order="14.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceTableHeading" xlink:label="PerformanceTableHeading" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformanceTableHeading" use="optional" order="24.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceTableNarrativeTextBlock" xlink:label="PerformanceTableNarrativeTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformanceTableNarrativeTextBlock" use="optional" order="25.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceTableClosingTextBlock" xlink:label="PerformanceTableClosingTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformanceTableClosingTextBlock" use="optional" order="39.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_BarChartTableTextBlock" xlink:label="BarChartTableTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="BarChartTableTextBlock" use="optional" order="12.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceTableTextBlock" xlink:label="PerformanceTableTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformanceTableTextBlock" use="optional" order="31.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_MarketIndexPerformanceTableTextBlock" xlink:label="MarketIndexPerformanceTableTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="MarketIndexPerformanceTableTextBlock" use="optional" order="34.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_MoneyMarketSevenDayYieldCaption" xlink:label="MoneyMarketSevenDayYieldCaption" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="MoneyMarketSevenDayYieldCaption" order="40.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_MoneyMarketSevenDayYieldColumnName" xlink:label="MoneyMarketSevenDayYieldColumnName" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="MoneyMarketSevenDayYieldColumnName" order="41.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_MoneyMarketSevenDayYieldPhone" xlink:label="MoneyMarketSevenDayYieldPhone" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="MoneyMarketSevenDayYieldPhone" order="42.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_MoneyMarketSevenDayYield" xlink:label="MoneyMarketSevenDayYield" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="MoneyMarketSevenDayYield" order="43.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_MoneyMarketSevenDayTaxEquivalentYield" xlink:label="MoneyMarketSevenDayTaxEquivalentYield" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="MoneyMarketSevenDayTaxEquivalentYield" order="44.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ThirtyDayYieldCaption" xlink:label="ThirtyDayYieldCaption" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ThirtyDayYieldCaption" order="45.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ThirtyDayYieldColumnName" xlink:label="ThirtyDayYieldColumnName" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ThirtyDayYieldColumnName" order="46.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ThirtyDayYieldPhone" xlink:label="ThirtyDayYieldPhone" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ThirtyDayYieldPhone" order="47.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ThirtyDayYield" xlink:label="ThirtyDayYield" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ThirtyDayYield" order="48.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ThirtyDayTaxEquivalentYield" xlink:label="ThirtyDayTaxEquivalentYield" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ThirtyDayTaxEquivalentYield" order="49.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceAvailabilityWebSiteAddress" xlink:label="PerformanceAvailabilityWebSiteAddress" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformanceAvailabilityWebSiteAddress" order="50.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceAvailabilityPhone" xlink:label="PerformanceAvailabilityPhone" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformanceAvailabilityPhone" order="51.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceTableFootnotesTextBlock" xlink:label="PerformanceTableFootnotesTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformanceTableFootnotesTextBlock" use="optional" order="35.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceTableFootnotesReasonPerformanceInformationForClassDifferentFromImmediatelyPrecedingPeriod" xlink:label="PerformanceTableFootnotesReasonPerformanceInformationForClassDifferentFromImmediatelyPrecedingPeriod" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformanceTableFootnotesReasonPerformanceInformationForClassDifferentFromImmediatelyPrecedingPeriod" order="36.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceTableOneClassOfAfterTaxShown" xlink:label="PerformanceTableOneClassOfAfterTaxShown" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformanceTableOneClassOfAfterTaxShown" order="37.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_IndexNoDeductionForFeesExpensesTaxes" xlink:label="IndexNoDeductionForFeesExpensesTaxes" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="IndexNoDeductionForFeesExpensesTaxes" order="38.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AverageAnnualReturnCaption" xlink:label="AverageAnnualReturnCaption" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="AverageAnnualReturnCaption" order="32.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AverageAnnualReturnColumnName" xlink:label="AverageAnnualReturnColumnName" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="AverageAnnualReturnColumnName" order="33.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceTableDoesReflectSalesLoads" xlink:label="PerformanceTableDoesReflectSalesLoads" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformanceTableDoesReflectSalesLoads" order="26.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceTableMarketIndexChanged" xlink:label="PerformanceTableMarketIndexChanged" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformanceTableMarketIndexChanged" order="27.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceTableUsesHighestFederalRate" xlink:label="PerformanceTableUsesHighestFederalRate" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformanceTableUsesHighestFederalRate" order="28.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceTableNotRelevantToTaxDeferred" xlink:label="PerformanceTableNotRelevantToTaxDeferred" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformanceTableNotRelevantToTaxDeferred" order="29.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceTableExplanationAfterTaxHigher" xlink:label="PerformanceTableExplanationAfterTaxHigher" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformanceTableExplanationAfterTaxHigher" order="30.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_YearToDateReturnLabel" xlink:label="YearToDateReturnLabel" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="YearToDateReturnLabel" order="15.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_BarChartYearToDateReturn" xlink:label="BarChartYearToDateReturn" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="BarChartYearToDateReturn" order="16.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_BarChartYearToDateReturnDate" xlink:label="BarChartYearToDateReturnDate" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="BarChartYearToDateReturnDate" order="17.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_HighestQuarterlyReturnLabel" xlink:label="HighestQuarterlyReturnLabel" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="HighestQuarterlyReturnLabel" order="18.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_BarChartHighestQuarterlyReturn" xlink:label="BarChartHighestQuarterlyReturn" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="BarChartHighestQuarterlyReturn" order="19.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_BarChartHighestQuarterlyReturnDate" xlink:label="BarChartHighestQuarterlyReturnDate" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="BarChartHighestQuarterlyReturnDate" order="20.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_LowestQuarterlyReturnLabel" xlink:label="LowestQuarterlyReturnLabel" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="LowestQuarterlyReturnLabel" order="21.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_BarChartLowestQuarterlyReturn" xlink:label="BarChartLowestQuarterlyReturn" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="BarChartLowestQuarterlyReturn" order="22.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_BarChartLowestQuarterlyReturnDate" xlink:label="BarChartLowestQuarterlyReturnDate" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="BarChartLowestQuarterlyReturnDate" order="23.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_BarChartDoesNotReflectSalesLoads" xlink:label="BarChartDoesNotReflectSalesLoads" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="BarChartDoesNotReflectSalesLoads" order="8.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_BarChartReturnsForClassNotOfferedInProspectus" xlink:label="BarChartReturnsForClassNotOfferedInProspectus" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="BarChartReturnsForClassNotOfferedInProspectus" order="9.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_BarChartReasonSelectedClassDifferentFromImmediatelyPrecedingPeriod" xlink:label="BarChartReasonSelectedClassDifferentFromImmediatelyPrecedingPeriod" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="BarChartReasonSelectedClassDifferentFromImmediatelyPrecedingPeriod" order="10.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformancePastDoesNotIndicateFuture" xlink:label="PerformancePastDoesNotIndicateFuture" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformancePastDoesNotIndicateFuture" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceInformationIllustratesVariabilityOfReturns" xlink:label="PerformanceInformationIllustratesVariabilityOfReturns" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformanceInformationIllustratesVariabilityOfReturns" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceOneYearOrLess" xlink:label="PerformanceOneYearOrLess" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformanceOneYearOrLess" order="5.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceAdditionalMarketIndex" xlink:label="PerformanceAdditionalMarketIndex" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformanceAdditionalMarketIndex" order="6.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ClassAxis" xlink:label="ClassAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ClassAxis" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ShareClassDomain" xlink:label="ShareClassDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="ShareClassDomain" order="1.0" priority="1" />
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/6/role/InvestmentRisks" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:link="http://www.xbrl.org/2003/linkbase">
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusTable" xlink:label="ProspectusTable" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="DocumentInformationDocumentAxis" use="optional" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentDomain" xlink:label="DocumentDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="DocumentInformationDocumentAxis" xlink:to="DocumentDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="CoregistrantAxis" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AllCoregistrantsMember" xlink:label="AllCoregistrantsMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="CoregistrantAxis" xlink:to="AllCoregistrantsMember" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="LegalEntityAxis" use="optional" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityDomain" xlink:label="EntityDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="EntityDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusLineItems" xlink:label="ProspectusLineItems" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ProspectusLineItems" order="5.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_RiskTextBlock" xlink:label="RiskTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="RiskTextBlock" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_RiskAxis" xlink:label="RiskAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="RiskAxis" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AllRisksMember" xlink:label="AllRisksMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="RiskAxis" xlink:to="AllRisksMember" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_RiskLoseMoneyMember" xlink:label="RiskLoseMoneyMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="RiskAxis" xlink:to="RiskLoseMoneyMember" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_RiskNotInsuredDepositoryInstitutionMember" xlink:label="RiskNotInsuredDepositoryInstitutionMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="RiskAxis" xlink:to="RiskNotInsuredDepositoryInstitutionMember" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_RiskNotInsuredMember" xlink:label="RiskNotInsuredMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="RiskAxis" xlink:to="RiskNotInsuredMember" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_RiskNondiversifiedStatusMember" xlink:label="RiskNondiversifiedStatusMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="RiskAxis" xlink:to="RiskNondiversifiedStatusMember" order="5.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_RiskMoneyMarketFundPriceFluctuatesMember" xlink:label="RiskMoneyMarketFundPriceFluctuatesMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="RiskAxis" xlink:to="RiskMoneyMarketFundPriceFluctuatesMember" order="6.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_RiskMoneyMarketFundMayImposeFeesOrSuspendSalesMember" xlink:label="RiskMoneyMarketFundMayImposeFeesOrSuspendSalesMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="RiskAxis" xlink:to="RiskMoneyMarketFundMayImposeFeesOrSuspendSalesMember" order="7.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_RiskMoneyMarketFundMayNotPreserveDollarMember" xlink:label="RiskMoneyMarketFundMayNotPreserveDollarMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="RiskAxis" xlink:to="RiskMoneyMarketFundMayNotPreserveDollarMember" order="8.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_RiskMoneyMarketFundSponsorMayNotProvideSupportMember" xlink:label="RiskMoneyMarketFundSponsorMayNotProvideSupportMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="RiskAxis" xlink:to="RiskMoneyMarketFundSponsorMayNotProvideSupportMember" order="9.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_RisksAbstract" xlink:label="RisksAbstract" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="RisksAbstract" xlink:to="ProspectusTable" use="optional" order="1.0" priority="1" />
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/6/role/InvestmentStrategy" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:link="http://www.xbrl.org/2003/linkbase">
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_FormN1aAbstract" xlink:label="FormN1aAbstract" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusTable" xlink:label="ProspectusTable" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="FormN1aAbstract" xlink:to="ProspectusTable" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="DocumentInformationDocumentAxis" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentDomain" xlink:label="DocumentDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="DocumentInformationDocumentAxis" xlink:to="DocumentDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="CoregistrantAxis" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AllCoregistrantsMember" xlink:label="AllCoregistrantsMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="CoregistrantAxis" xlink:to="AllCoregistrantsMember" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="LegalEntityAxis" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityDomain" xlink:label="EntityDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="EntityDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusLineItems" xlink:label="ProspectusLineItems" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ProspectusLineItems" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_StrategyHeading" xlink:label="StrategyHeading" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="StrategyHeading" use="optional" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_StrategyNarrativeTextBlock" xlink:label="StrategyNarrativeTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="StrategyNarrativeTextBlock" use="optional" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_StrategyPortfolioConcentration" xlink:label="StrategyPortfolioConcentration" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="StrategyPortfolioConcentration" order="3.0" priority="1" />
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/6/role/FeesAndExpenses" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:link="http://www.xbrl.org/2003/linkbase">
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_FormN1aAbstract" xlink:label="FormN1aAbstract" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusTable" xlink:label="ProspectusTable" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="FormN1aAbstract" xlink:to="ProspectusTable" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="DocumentInformationDocumentAxis" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentDomain" xlink:label="DocumentDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="DocumentInformationDocumentAxis" xlink:to="DocumentDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="CoregistrantAxis" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AllCoregistrantsMember" xlink:label="AllCoregistrantsMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="CoregistrantAxis" xlink:to="AllCoregistrantsMember" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="LegalEntityAxis" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityDomain" xlink:label="EntityDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="EntityDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusLineItems" xlink:label="ProspectusLineItems" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ProspectusLineItems" order="5.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseHeading" xlink:label="ExpenseHeading" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseHeading" use="optional" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseNarrativeTextBlock" xlink:label="ExpenseNarrativeTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseNarrativeTextBlock" use="optional" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ShareholderFeesCaption" xlink:label="ShareholderFeesCaption" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ShareholderFeesCaption" use="optional" order="11.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_OperatingExpensesCaption" xlink:label="OperatingExpensesCaption" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="OperatingExpensesCaption" use="optional" order="13.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseFootnotesTextBlock" xlink:label="ExpenseFootnotesTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseFootnotesTextBlock" use="optional" order="15.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpensesDeferredChargesTextBlock" xlink:label="ExpensesDeferredChargesTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpensesDeferredChargesTextBlock" use="optional" order="16.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpensesRangeOfExchangeFeesTextBlock" xlink:label="ExpensesRangeOfExchangeFeesTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpensesRangeOfExchangeFeesTextBlock" use="optional" order="17.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleHeading" xlink:label="ExpenseExampleHeading" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleHeading" use="optional" order="18.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleByYearHeading" xlink:label="ExpenseExampleByYearHeading" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleByYearHeading" use="optional" order="19.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleNarrativeTextBlock" xlink:label="ExpenseExampleNarrativeTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleNarrativeTextBlock" use="optional" order="20.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleByYearCaption" xlink:label="ExpenseExampleByYearCaption" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleByYearCaption" use="optional" order="21.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleNoRedemptionNarrativeTextBlock" xlink:label="ExpenseExampleNoRedemptionNarrativeTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleNoRedemptionNarrativeTextBlock" use="optional" order="23.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleNoRedemptionByYearCaption" xlink:label="ExpenseExampleNoRedemptionByYearCaption" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleNoRedemptionByYearCaption" use="optional" order="24.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleFootnotesTextBlock" xlink:label="ExpenseExampleFootnotesTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleFootnotesTextBlock" use="optional" order="26.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleClosingTextBlock" xlink:label="ExpenseExampleClosingTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleClosingTextBlock" use="optional" order="27.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PortfolioTurnoverHeading" xlink:label="PortfolioTurnoverHeading" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PortfolioTurnoverHeading" use="optional" order="28.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PortfolioTurnoverTextBlock" xlink:label="PortfolioTurnoverTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PortfolioTurnoverTextBlock" use="optional" order="29.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ShareholderFeesTableTextBlock" xlink:label="ShareholderFeesTableTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ShareholderFeesTableTextBlock" use="optional" order="12.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AnnualFundOperatingExpensesTableTextBlock" xlink:label="AnnualFundOperatingExpensesTableTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="AnnualFundOperatingExpensesTableTextBlock" use="optional" order="14.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleWithRedemptionTableTextBlock" xlink:label="ExpenseExampleWithRedemptionTableTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleWithRedemptionTableTextBlock" use="optional" order="22.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleNoRedemptionTableTextBlock" xlink:label="ExpenseExampleNoRedemptionTableTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleNoRedemptionTableTextBlock" use="optional" order="25.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PortfolioTurnoverRate" xlink:label="PortfolioTurnoverRate" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PortfolioTurnoverRate" order="30.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseBreakpointDiscounts" xlink:label="ExpenseBreakpointDiscounts" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseBreakpointDiscounts" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpensesOtherExpensesHadExtraordinaryExpensesBeenIncluded" xlink:label="ExpensesOtherExpensesHadExtraordinaryExpensesBeenIncluded" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpensesOtherExpensesHadExtraordinaryExpensesBeenIncluded" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpensesRestatedToReflectCurrent" xlink:label="ExpensesRestatedToReflectCurrent" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpensesRestatedToReflectCurrent" order="5.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseBreakpointMinimumInvestmentRequiredAmount" xlink:label="ExpenseBreakpointMinimumInvestmentRequiredAmount" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseBreakpointMinimumInvestmentRequiredAmount" order="6.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_OtherExpensesNewFundBasedOnEstimates" xlink:label="OtherExpensesNewFundBasedOnEstimates" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="OtherExpensesNewFundBasedOnEstimates" order="7.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AcquiredFundFeesAndExpensesBasedOnEstimates" xlink:label="AcquiredFundFeesAndExpensesBasedOnEstimates" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="AcquiredFundFeesAndExpensesBasedOnEstimates" order="8.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpensesNotCorrelatedToRatioDueToAcquiredFundFees" xlink:label="ExpensesNotCorrelatedToRatioDueToAcquiredFundFees" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpensesNotCorrelatedToRatioDueToAcquiredFundFees" order="9.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpensesExplanationOfNonrecurringAccountFee" xlink:label="ExpensesExplanationOfNonrecurringAccountFee" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpensesExplanationOfNonrecurringAccountFee" order="10.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ClassAxis" xlink:label="ClassAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ClassAxis" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ShareClassDomain" xlink:label="ShareClassDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="ShareClassDomain" order="1.0" priority="1" />
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/6/role/N1aSupplement" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:link="http://www.xbrl.org/2003/linkbase">
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_FormN1aAbstract" xlink:label="FormN1aAbstract" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusTable" xlink:label="ProspectusTable" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="FormN1aAbstract" xlink:to="ProspectusTable" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="DocumentInformationDocumentAxis" use="optional" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentDomain" xlink:label="DocumentDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="DocumentInformationDocumentAxis" xlink:to="DocumentDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="CoregistrantAxis" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AllCoregistrantsMember" xlink:label="AllCoregistrantsMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="CoregistrantAxis" xlink:to="AllCoregistrantsMember" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="LegalEntityAxis" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityDomain" xlink:label="EntityDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="EntityDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusLineItems" xlink:label="ProspectusLineItems" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ProspectusLineItems" order="5.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_SupplementToProspectusTextBlock" xlink:label="SupplementToProspectusTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="SupplementToProspectusTextBlock" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ClassAxis" xlink:label="ClassAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ClassAxis" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ShareClassDomain" xlink:label="ShareClassDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="ShareClassDomain" order="1.0" priority="1" />
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/7/role/RiskReturn" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:link="http://www.xbrl.org/2003/linkbase">
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_FormN1aAbstract" xlink:label="FormN1aAbstract" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusTable" xlink:label="ProspectusTable" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="FormN1aAbstract" xlink:to="ProspectusTable" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="DocumentInformationDocumentAxis" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentDomain" xlink:label="DocumentDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="DocumentInformationDocumentAxis" xlink:to="DocumentDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="CoregistrantAxis" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AllCoregistrantsMember" xlink:label="AllCoregistrantsMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="CoregistrantAxis" xlink:to="AllCoregistrantsMember" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="LegalEntityAxis" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityDomain" xlink:label="EntityDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="EntityDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusLineItems" xlink:label="ProspectusLineItems" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ProspectusLineItems" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_RiskReturnHeading" xlink:label="RiskReturnHeading" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="RiskReturnHeading" use="optional" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ObjectiveHeading" xlink:label="ObjectiveHeading" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ObjectiveHeading" use="optional" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ObjectivePrimaryTextBlock" xlink:label="ObjectivePrimaryTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ObjectivePrimaryTextBlock" use="optional" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ObjectiveSecondaryTextBlock" xlink:label="ObjectiveSecondaryTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ObjectiveSecondaryTextBlock" use="optional" order="4.0" priority="1" />
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/7/role/ShareholderFeesData" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:link="http://www.xbrl.org/2003/linkbase">
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusTable" xlink:label="ProspectusTable" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="DocumentInformationDocumentAxis" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentDomain" xlink:label="DocumentDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="DocumentInformationDocumentAxis" xlink:to="DocumentDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="CoregistrantAxis" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AllCoregistrantsMember" xlink:label="AllCoregistrantsMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="CoregistrantAxis" xlink:to="AllCoregistrantsMember" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="LegalEntityAxis" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityDomain" xlink:label="EntityDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="EntityDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusLineItems" xlink:label="ProspectusLineItems" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ProspectusLineItems" order="5.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ShareholderFeesColumnName" xlink:label="ShareholderFeesColumnName" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ShareholderFeesColumnName" use="optional" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_MaximumCumulativeSalesChargeOverOfferingPrice" xlink:label="MaximumCumulativeSalesChargeOverOfferingPrice" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="MaximumCumulativeSalesChargeOverOfferingPrice" use="optional" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_MaximumCumulativeSalesChargeOverOther" xlink:label="MaximumCumulativeSalesChargeOverOther" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="MaximumCumulativeSalesChargeOverOther" use="optional" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice" xlink:label="MaximumSalesChargeImposedOnPurchasesOverOfferingPrice" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="MaximumSalesChargeImposedOnPurchasesOverOfferingPrice" use="optional" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_MaximumDeferredSalesChargeOverOfferingPrice" xlink:label="MaximumDeferredSalesChargeOverOfferingPrice" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="MaximumDeferredSalesChargeOverOfferingPrice" use="optional" order="5.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_MaximumDeferredSalesChargeOverOther" xlink:label="MaximumDeferredSalesChargeOverOther" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="MaximumDeferredSalesChargeOverOther" use="optional" order="6.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther" xlink:label="MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther" use="optional" order="7.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_RedemptionFeeOverRedemption" xlink:label="RedemptionFeeOverRedemption" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="RedemptionFeeOverRedemption" use="optional" order="8.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_RedemptionFee" xlink:label="RedemptionFee" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="RedemptionFee" use="optional" order="9.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExchangeFeeOverRedemption" xlink:label="ExchangeFeeOverRedemption" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExchangeFeeOverRedemption" use="optional" order="10.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExchangeFee" xlink:label="ExchangeFee" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExchangeFee" use="optional" order="11.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_MaximumAccountFeeOverAssets" xlink:label="MaximumAccountFeeOverAssets" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="MaximumAccountFeeOverAssets" use="optional" order="12.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_MaximumAccountFee" xlink:label="MaximumAccountFee" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="MaximumAccountFee" use="optional" order="13.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ShareholderFeeOther" xlink:label="ShareholderFeeOther" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ShareholderFeeOther" use="optional" order="14.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ClassAxis" xlink:label="ClassAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ClassAxis" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ShareClassDomain" xlink:label="ShareClassDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="ShareClassDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ShareholderFeesAbstract" xlink:label="ShareholderFeesAbstract" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ShareholderFeesAbstract" xlink:to="ProspectusTable" order="1.0" priority="1" />
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/7/role/OperatingExpensesData" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:link="http://www.xbrl.org/2003/linkbase">
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_FormN1aAbstract" xlink:label="FormN1aAbstract" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusTable" xlink:label="ProspectusTable" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="FormN1aAbstract" xlink:to="ProspectusTable" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="DocumentInformationDocumentAxis" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentDomain" xlink:label="DocumentDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="DocumentInformationDocumentAxis" xlink:to="DocumentDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="CoregistrantAxis" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AllCoregistrantsMember" xlink:label="AllCoregistrantsMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="CoregistrantAxis" xlink:to="AllCoregistrantsMember" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="LegalEntityAxis" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityDomain" xlink:label="EntityDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="EntityDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusLineItems" xlink:label="ProspectusLineItems" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ProspectusLineItems" order="5.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_OperatingExpensesColumnName" xlink:label="OperatingExpensesColumnName" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="OperatingExpensesColumnName" use="optional" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ManagementFeesOverAssets" xlink:label="ManagementFeesOverAssets" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ManagementFeesOverAssets" use="optional" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_DistributionAndService12b1FeesOverAssets" xlink:label="DistributionAndService12b1FeesOverAssets" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="DistributionAndService12b1FeesOverAssets" use="optional" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_DistributionOrSimilarNon12b1FeesOverAssets" xlink:label="DistributionOrSimilarNon12b1FeesOverAssets" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="DistributionOrSimilarNon12b1FeesOverAssets" use="optional" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_Component1OtherExpensesOverAssets" xlink:label="Component1OtherExpensesOverAssets" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="Component1OtherExpensesOverAssets" use="optional" order="5.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_Component2OtherExpensesOverAssets" xlink:label="Component2OtherExpensesOverAssets" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="Component2OtherExpensesOverAssets" use="optional" order="6.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_Component3OtherExpensesOverAssets" xlink:label="Component3OtherExpensesOverAssets" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="Component3OtherExpensesOverAssets" use="optional" order="7.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_OtherExpensesOverAssets" xlink:label="OtherExpensesOverAssets" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="OtherExpensesOverAssets" use="optional" order="8.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AcquiredFundFeesAndExpensesOverAssets" xlink:label="AcquiredFundFeesAndExpensesOverAssets" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="AcquiredFundFeesAndExpensesOverAssets" use="optional" order="9.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpensesOverAssets" xlink:label="ExpensesOverAssets" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpensesOverAssets" use="optional" order="10.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_FeeWaiverOrReimbursementOverAssets" xlink:label="FeeWaiverOrReimbursementOverAssets" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="FeeWaiverOrReimbursementOverAssets" use="optional" order="11.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_NetExpensesOverAssets" xlink:label="NetExpensesOverAssets" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="NetExpensesOverAssets" use="optional" order="12.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_FeeWaiverOrReimbursementOverAssetsDateOfTermination" xlink:label="FeeWaiverOrReimbursementOverAssetsDateOfTermination" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="FeeWaiverOrReimbursementOverAssetsDateOfTermination" order="13.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ClassAxis" xlink:label="ClassAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ClassAxis" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ShareClassDomain" xlink:label="ShareClassDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="ShareClassDomain" order="1.0" priority="1" />
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/7/role/ExpenseExample" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:link="http://www.xbrl.org/2003/linkbase">
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusTable" xlink:label="ProspectusTable" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="DocumentInformationDocumentAxis" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentDomain" xlink:label="DocumentDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="DocumentInformationDocumentAxis" xlink:to="DocumentDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="CoregistrantAxis" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AllCoregistrantsMember" xlink:label="AllCoregistrantsMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="CoregistrantAxis" xlink:to="AllCoregistrantsMember" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="LegalEntityAxis" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityDomain" xlink:label="EntityDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="EntityDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusLineItems" xlink:label="ProspectusLineItems" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ProspectusLineItems" order="5.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleByYearColumnName" xlink:label="ExpenseExampleByYearColumnName" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleByYearColumnName" use="optional" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleYear01" xlink:label="ExpenseExampleYear01" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleYear01" use="optional" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleYear03" xlink:label="ExpenseExampleYear03" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleYear03" use="optional" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleYear05" xlink:label="ExpenseExampleYear05" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleYear05" use="optional" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleYear10" xlink:label="ExpenseExampleYear10" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleYear10" use="optional" order="5.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ClassAxis" xlink:label="ClassAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ClassAxis" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ShareClassDomain" xlink:label="ShareClassDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="ShareClassDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleAbstract" xlink:label="ExpenseExampleAbstract" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ExpenseExampleAbstract" xlink:to="ProspectusTable" order="1.0" priority="1" />
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/7/role/ExpenseExampleNoRedemption" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:link="http://www.xbrl.org/2003/linkbase">
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusTable" xlink:label="ProspectusTable" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="DocumentInformationDocumentAxis" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentDomain" xlink:label="DocumentDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="DocumentInformationDocumentAxis" xlink:to="DocumentDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="CoregistrantAxis" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AllCoregistrantsMember" xlink:label="AllCoregistrantsMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="CoregistrantAxis" xlink:to="AllCoregistrantsMember" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="LegalEntityAxis" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityDomain" xlink:label="EntityDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="EntityDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusLineItems" xlink:label="ProspectusLineItems" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ProspectusLineItems" order="5.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleNoRedemptionByYearColumnName" xlink:label="ExpenseExampleNoRedemptionByYearColumnName" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleNoRedemptionByYearColumnName" use="optional" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleNoRedemptionYear01" xlink:label="ExpenseExampleNoRedemptionYear01" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleNoRedemptionYear01" use="optional" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleNoRedemptionYear03" xlink:label="ExpenseExampleNoRedemptionYear03" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleNoRedemptionYear03" use="optional" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleNoRedemptionYear05" xlink:label="ExpenseExampleNoRedemptionYear05" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleNoRedemptionYear05" use="optional" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleNoRedemptionYear10" xlink:label="ExpenseExampleNoRedemptionYear10" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleNoRedemptionYear10" use="optional" order="5.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ClassAxis" xlink:label="ClassAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ClassAxis" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ShareClassDomain" xlink:label="ShareClassDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="ShareClassDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleNoRedemptionAbstract" xlink:label="ExpenseExampleNoRedemptionAbstract" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ExpenseExampleNoRedemptionAbstract" xlink:to="ProspectusTable" order="1.0" priority="1" />
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/7/role/BarChartData" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:link="http://www.xbrl.org/2003/linkbase">
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusTable" xlink:label="ProspectusTable" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="DocumentInformationDocumentAxis" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentDomain" xlink:label="DocumentDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="DocumentInformationDocumentAxis" xlink:to="DocumentDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="CoregistrantAxis" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AllCoregistrantsMember" xlink:label="AllCoregistrantsMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="CoregistrantAxis" xlink:to="AllCoregistrantsMember" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="LegalEntityAxis" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityDomain" xlink:label="EntityDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="EntityDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusLineItems" xlink:label="ProspectusLineItems" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ProspectusLineItems" order="5.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AnnualReturnCaption" xlink:label="AnnualReturnCaption" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="AnnualReturnCaption" use="optional" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AnnualReturnColumnName" xlink:label="AnnualReturnColumnName" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="AnnualReturnColumnName" use="optional" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AnnualReturnInceptionDate" xlink:label="AnnualReturnInceptionDate" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="AnnualReturnInceptionDate" use="optional" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AnnlRtrPct" xlink:label="AnnlRtrPct" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="AnnlRtrPct" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ClassAxis" xlink:label="ClassAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ClassAxis" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ShareClassDomain" xlink:label="ShareClassDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="ShareClassDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_BarChartTableAbstract" xlink:label="BarChartTableAbstract" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="BarChartTableAbstract" xlink:to="ProspectusTable" order="1.0" priority="1" />
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/7/role/PerformanceTableData" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:link="http://www.xbrl.org/2003/linkbase">
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusTable" xlink:label="ProspectusTable" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="DocumentInformationDocumentAxis" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentDomain" xlink:label="DocumentDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="DocumentInformationDocumentAxis" xlink:to="DocumentDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="CoregistrantAxis" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AllCoregistrantsMember" xlink:label="AllCoregistrantsMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="CoregistrantAxis" xlink:to="AllCoregistrantsMember" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusLineItems" xlink:label="ProspectusLineItems" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ProspectusLineItems" order="5.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AverageAnnualReturnLabel" xlink:label="AverageAnnualReturnLabel" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="AverageAnnualReturnLabel" use="optional" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AvgAnnlRtrPct" xlink:label="AvgAnnlRtrPct" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="AvgAnnlRtrPct" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerfInceptionDate" xlink:label="PerfInceptionDate" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerfInceptionDate" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ClassAxis" xlink:label="ClassAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ClassAxis" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ShareClassDomain" xlink:label="ShareClassDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="ShareClassDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceMeasureAxis" xlink:label="PerformanceMeasureAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="PerformanceMeasureAxis" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceMeasureDomain" xlink:label="PerformanceMeasureDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="PerformanceMeasureAxis" xlink:to="PerformanceMeasureDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AfterTaxesOnDistributionsMember" xlink:label="AfterTaxesOnDistributionsMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="PerformanceMeasureDomain" xlink:to="AfterTaxesOnDistributionsMember" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AfterTaxesOnDistributionsAndSalesMember" xlink:label="AfterTaxesOnDistributionsAndSalesMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="PerformanceMeasureDomain" xlink:to="AfterTaxesOnDistributionsAndSalesMember" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AverageAnnualReturnAbstract" xlink:label="AverageAnnualReturnAbstract" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="AverageAnnualReturnAbstract" xlink:to="ProspectusTable" order="1.0" priority="1" />
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/7/role/N1aCover" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:link="http://www.xbrl.org/2003/linkbase">
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_FormN1aAbstract" xlink:label="FormN1aAbstract" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusTable" xlink:label="ProspectusTable" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="FormN1aAbstract" xlink:to="ProspectusTable" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="DocumentInformationDocumentAxis" use="optional" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentDomain" xlink:label="DocumentDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="DocumentInformationDocumentAxis" xlink:to="DocumentDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="CoregistrantAxis" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AllCoregistrantsMember" xlink:label="AllCoregistrantsMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="CoregistrantAxis" xlink:to="AllCoregistrantsMember" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusLineItems" xlink:label="ProspectusLineItems" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ProspectusLineItems" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentType" xlink:label="DocumentType" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="DocumentType" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_AmendmentFlag" xlink:label="AmendmentFlag" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="AmendmentFlag" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_AmendmentDescription" xlink:label="AmendmentDescription" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="AmendmentDescription" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityRegistrantName" xlink:label="EntityRegistrantName" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="EntityRegistrantName" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityCentralIndexKey" xlink:label="EntityCentralIndexKey" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="EntityCentralIndexKey" order="5.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityInvCompanyType" xlink:label="EntityInvCompanyType" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="EntityInvCompanyType" order="6.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentPeriodEndDate" xlink:label="DocumentPeriodEndDate" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="DocumentPeriodEndDate" order="7.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusDate" xlink:label="ProspectusDate" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ProspectusDate" order="8.0" priority="1" />
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/7/role/PerformanceManagement" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:link="http://www.xbrl.org/2003/linkbase">
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_FormN1aAbstract" xlink:label="FormN1aAbstract" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusTable" xlink:label="ProspectusTable" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="FormN1aAbstract" xlink:to="ProspectusTable" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="DocumentInformationDocumentAxis" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentDomain" xlink:label="DocumentDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="DocumentInformationDocumentAxis" xlink:to="DocumentDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="CoregistrantAxis" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AllCoregistrantsMember" xlink:label="AllCoregistrantsMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="CoregistrantAxis" xlink:to="AllCoregistrantsMember" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="LegalEntityAxis" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityDomain" xlink:label="EntityDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="EntityDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusLineItems" xlink:label="ProspectusLineItems" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ProspectusLineItems" order="5.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_BarChartAndPerformanceTableHeading" xlink:label="BarChartAndPerformanceTableHeading" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="BarChartAndPerformanceTableHeading" use="optional" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceNarrativeTextBlock" xlink:label="PerformanceNarrativeTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformanceNarrativeTextBlock" use="optional" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_BarChartNarrativeTextBlock" xlink:label="BarChartNarrativeTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="BarChartNarrativeTextBlock" use="optional" order="7.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_BarChartHeading" xlink:label="BarChartHeading" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="BarChartHeading" use="optional" order="11.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_BarChartFootnotesTextBlock" xlink:label="BarChartFootnotesTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="BarChartFootnotesTextBlock" use="optional" order="13.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_BarChartClosingTextBlock" xlink:label="BarChartClosingTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="BarChartClosingTextBlock" use="optional" order="14.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceTableHeading" xlink:label="PerformanceTableHeading" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformanceTableHeading" use="optional" order="24.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceTableNarrativeTextBlock" xlink:label="PerformanceTableNarrativeTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformanceTableNarrativeTextBlock" use="optional" order="25.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceTableClosingTextBlock" xlink:label="PerformanceTableClosingTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformanceTableClosingTextBlock" use="optional" order="39.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_BarChartTableTextBlock" xlink:label="BarChartTableTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="BarChartTableTextBlock" use="optional" order="12.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceTableTextBlock" xlink:label="PerformanceTableTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformanceTableTextBlock" use="optional" order="31.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_MarketIndexPerformanceTableTextBlock" xlink:label="MarketIndexPerformanceTableTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="MarketIndexPerformanceTableTextBlock" use="optional" order="34.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_MoneyMarketSevenDayYieldCaption" xlink:label="MoneyMarketSevenDayYieldCaption" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="MoneyMarketSevenDayYieldCaption" order="40.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_MoneyMarketSevenDayYieldColumnName" xlink:label="MoneyMarketSevenDayYieldColumnName" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="MoneyMarketSevenDayYieldColumnName" order="41.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_MoneyMarketSevenDayYieldPhone" xlink:label="MoneyMarketSevenDayYieldPhone" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="MoneyMarketSevenDayYieldPhone" order="42.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_MoneyMarketSevenDayYield" xlink:label="MoneyMarketSevenDayYield" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="MoneyMarketSevenDayYield" order="43.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_MoneyMarketSevenDayTaxEquivalentYield" xlink:label="MoneyMarketSevenDayTaxEquivalentYield" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="MoneyMarketSevenDayTaxEquivalentYield" order="44.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ThirtyDayYieldCaption" xlink:label="ThirtyDayYieldCaption" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ThirtyDayYieldCaption" order="45.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ThirtyDayYieldColumnName" xlink:label="ThirtyDayYieldColumnName" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ThirtyDayYieldColumnName" order="46.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ThirtyDayYieldPhone" xlink:label="ThirtyDayYieldPhone" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ThirtyDayYieldPhone" order="47.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ThirtyDayYield" xlink:label="ThirtyDayYield" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ThirtyDayYield" order="48.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ThirtyDayTaxEquivalentYield" xlink:label="ThirtyDayTaxEquivalentYield" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ThirtyDayTaxEquivalentYield" order="49.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceAvailabilityWebSiteAddress" xlink:label="PerformanceAvailabilityWebSiteAddress" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformanceAvailabilityWebSiteAddress" order="50.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceAvailabilityPhone" xlink:label="PerformanceAvailabilityPhone" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformanceAvailabilityPhone" order="51.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceTableFootnotesTextBlock" xlink:label="PerformanceTableFootnotesTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformanceTableFootnotesTextBlock" use="optional" order="35.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceTableFootnotesReasonPerformanceInformationForClassDifferentFromImmediatelyPrecedingPeriod" xlink:label="PerformanceTableFootnotesReasonPerformanceInformationForClassDifferentFromImmediatelyPrecedingPeriod" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformanceTableFootnotesReasonPerformanceInformationForClassDifferentFromImmediatelyPrecedingPeriod" order="36.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceTableOneClassOfAfterTaxShown" xlink:label="PerformanceTableOneClassOfAfterTaxShown" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformanceTableOneClassOfAfterTaxShown" order="37.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_IndexNoDeductionForFeesExpensesTaxes" xlink:label="IndexNoDeductionForFeesExpensesTaxes" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="IndexNoDeductionForFeesExpensesTaxes" order="38.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AverageAnnualReturnCaption" xlink:label="AverageAnnualReturnCaption" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="AverageAnnualReturnCaption" order="32.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AverageAnnualReturnColumnName" xlink:label="AverageAnnualReturnColumnName" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="AverageAnnualReturnColumnName" order="33.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceTableDoesReflectSalesLoads" xlink:label="PerformanceTableDoesReflectSalesLoads" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformanceTableDoesReflectSalesLoads" order="26.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceTableMarketIndexChanged" xlink:label="PerformanceTableMarketIndexChanged" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformanceTableMarketIndexChanged" order="27.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceTableUsesHighestFederalRate" xlink:label="PerformanceTableUsesHighestFederalRate" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformanceTableUsesHighestFederalRate" order="28.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceTableNotRelevantToTaxDeferred" xlink:label="PerformanceTableNotRelevantToTaxDeferred" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformanceTableNotRelevantToTaxDeferred" order="29.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceTableExplanationAfterTaxHigher" xlink:label="PerformanceTableExplanationAfterTaxHigher" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformanceTableExplanationAfterTaxHigher" order="30.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_YearToDateReturnLabel" xlink:label="YearToDateReturnLabel" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="YearToDateReturnLabel" order="15.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_BarChartYearToDateReturn" xlink:label="BarChartYearToDateReturn" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="BarChartYearToDateReturn" order="16.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_BarChartYearToDateReturnDate" xlink:label="BarChartYearToDateReturnDate" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="BarChartYearToDateReturnDate" order="17.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_HighestQuarterlyReturnLabel" xlink:label="HighestQuarterlyReturnLabel" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="HighestQuarterlyReturnLabel" order="18.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_BarChartHighestQuarterlyReturn" xlink:label="BarChartHighestQuarterlyReturn" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="BarChartHighestQuarterlyReturn" order="19.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_BarChartHighestQuarterlyReturnDate" xlink:label="BarChartHighestQuarterlyReturnDate" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="BarChartHighestQuarterlyReturnDate" order="20.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_LowestQuarterlyReturnLabel" xlink:label="LowestQuarterlyReturnLabel" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="LowestQuarterlyReturnLabel" order="21.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_BarChartLowestQuarterlyReturn" xlink:label="BarChartLowestQuarterlyReturn" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="BarChartLowestQuarterlyReturn" order="22.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_BarChartLowestQuarterlyReturnDate" xlink:label="BarChartLowestQuarterlyReturnDate" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="BarChartLowestQuarterlyReturnDate" order="23.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_BarChartDoesNotReflectSalesLoads" xlink:label="BarChartDoesNotReflectSalesLoads" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="BarChartDoesNotReflectSalesLoads" order="8.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_BarChartReturnsForClassNotOfferedInProspectus" xlink:label="BarChartReturnsForClassNotOfferedInProspectus" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="BarChartReturnsForClassNotOfferedInProspectus" order="9.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_BarChartReasonSelectedClassDifferentFromImmediatelyPrecedingPeriod" xlink:label="BarChartReasonSelectedClassDifferentFromImmediatelyPrecedingPeriod" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="BarChartReasonSelectedClassDifferentFromImmediatelyPrecedingPeriod" order="10.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformancePastDoesNotIndicateFuture" xlink:label="PerformancePastDoesNotIndicateFuture" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformancePastDoesNotIndicateFuture" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceInformationIllustratesVariabilityOfReturns" xlink:label="PerformanceInformationIllustratesVariabilityOfReturns" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformanceInformationIllustratesVariabilityOfReturns" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceOneYearOrLess" xlink:label="PerformanceOneYearOrLess" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformanceOneYearOrLess" order="5.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceAdditionalMarketIndex" xlink:label="PerformanceAdditionalMarketIndex" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformanceAdditionalMarketIndex" order="6.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ClassAxis" xlink:label="ClassAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ClassAxis" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ShareClassDomain" xlink:label="ShareClassDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="ShareClassDomain" order="1.0" priority="1" />
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/7/role/InvestmentRisks" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:link="http://www.xbrl.org/2003/linkbase">
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusTable" xlink:label="ProspectusTable" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="DocumentInformationDocumentAxis" use="optional" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentDomain" xlink:label="DocumentDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="DocumentInformationDocumentAxis" xlink:to="DocumentDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="CoregistrantAxis" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AllCoregistrantsMember" xlink:label="AllCoregistrantsMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="CoregistrantAxis" xlink:to="AllCoregistrantsMember" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="LegalEntityAxis" use="optional" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityDomain" xlink:label="EntityDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="EntityDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusLineItems" xlink:label="ProspectusLineItems" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ProspectusLineItems" order="5.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_RiskTextBlock" xlink:label="RiskTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="RiskTextBlock" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_RiskAxis" xlink:label="RiskAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="RiskAxis" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AllRisksMember" xlink:label="AllRisksMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="RiskAxis" xlink:to="AllRisksMember" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_RiskLoseMoneyMember" xlink:label="RiskLoseMoneyMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="RiskAxis" xlink:to="RiskLoseMoneyMember" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_RiskNotInsuredDepositoryInstitutionMember" xlink:label="RiskNotInsuredDepositoryInstitutionMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="RiskAxis" xlink:to="RiskNotInsuredDepositoryInstitutionMember" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_RiskNotInsuredMember" xlink:label="RiskNotInsuredMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="RiskAxis" xlink:to="RiskNotInsuredMember" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_RiskNondiversifiedStatusMember" xlink:label="RiskNondiversifiedStatusMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="RiskAxis" xlink:to="RiskNondiversifiedStatusMember" order="5.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_RiskMoneyMarketFundPriceFluctuatesMember" xlink:label="RiskMoneyMarketFundPriceFluctuatesMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="RiskAxis" xlink:to="RiskMoneyMarketFundPriceFluctuatesMember" order="6.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_RiskMoneyMarketFundMayImposeFeesOrSuspendSalesMember" xlink:label="RiskMoneyMarketFundMayImposeFeesOrSuspendSalesMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="RiskAxis" xlink:to="RiskMoneyMarketFundMayImposeFeesOrSuspendSalesMember" order="7.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_RiskMoneyMarketFundMayNotPreserveDollarMember" xlink:label="RiskMoneyMarketFundMayNotPreserveDollarMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="RiskAxis" xlink:to="RiskMoneyMarketFundMayNotPreserveDollarMember" order="8.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_RiskMoneyMarketFundSponsorMayNotProvideSupportMember" xlink:label="RiskMoneyMarketFundSponsorMayNotProvideSupportMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="RiskAxis" xlink:to="RiskMoneyMarketFundSponsorMayNotProvideSupportMember" order="9.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_RisksAbstract" xlink:label="RisksAbstract" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="RisksAbstract" xlink:to="ProspectusTable" use="optional" order="1.0" priority="1" />
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/7/role/InvestmentStrategy" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:link="http://www.xbrl.org/2003/linkbase">
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_FormN1aAbstract" xlink:label="FormN1aAbstract" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusTable" xlink:label="ProspectusTable" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="FormN1aAbstract" xlink:to="ProspectusTable" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="DocumentInformationDocumentAxis" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentDomain" xlink:label="DocumentDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="DocumentInformationDocumentAxis" xlink:to="DocumentDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="CoregistrantAxis" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AllCoregistrantsMember" xlink:label="AllCoregistrantsMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="CoregistrantAxis" xlink:to="AllCoregistrantsMember" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="LegalEntityAxis" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityDomain" xlink:label="EntityDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="EntityDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusLineItems" xlink:label="ProspectusLineItems" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ProspectusLineItems" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_StrategyHeading" xlink:label="StrategyHeading" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="StrategyHeading" use="optional" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_StrategyNarrativeTextBlock" xlink:label="StrategyNarrativeTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="StrategyNarrativeTextBlock" use="optional" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_StrategyPortfolioConcentration" xlink:label="StrategyPortfolioConcentration" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="StrategyPortfolioConcentration" order="3.0" priority="1" />
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/7/role/FeesAndExpenses" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:link="http://www.xbrl.org/2003/linkbase">
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_FormN1aAbstract" xlink:label="FormN1aAbstract" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusTable" xlink:label="ProspectusTable" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="FormN1aAbstract" xlink:to="ProspectusTable" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="DocumentInformationDocumentAxis" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentDomain" xlink:label="DocumentDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="DocumentInformationDocumentAxis" xlink:to="DocumentDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="CoregistrantAxis" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AllCoregistrantsMember" xlink:label="AllCoregistrantsMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="CoregistrantAxis" xlink:to="AllCoregistrantsMember" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="LegalEntityAxis" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityDomain" xlink:label="EntityDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="EntityDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusLineItems" xlink:label="ProspectusLineItems" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ProspectusLineItems" order="5.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseHeading" xlink:label="ExpenseHeading" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseHeading" use="optional" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseNarrativeTextBlock" xlink:label="ExpenseNarrativeTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseNarrativeTextBlock" use="optional" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ShareholderFeesCaption" xlink:label="ShareholderFeesCaption" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ShareholderFeesCaption" use="optional" order="11.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_OperatingExpensesCaption" xlink:label="OperatingExpensesCaption" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="OperatingExpensesCaption" use="optional" order="13.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseFootnotesTextBlock" xlink:label="ExpenseFootnotesTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseFootnotesTextBlock" use="optional" order="15.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpensesDeferredChargesTextBlock" xlink:label="ExpensesDeferredChargesTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpensesDeferredChargesTextBlock" use="optional" order="16.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpensesRangeOfExchangeFeesTextBlock" xlink:label="ExpensesRangeOfExchangeFeesTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpensesRangeOfExchangeFeesTextBlock" use="optional" order="17.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleHeading" xlink:label="ExpenseExampleHeading" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleHeading" use="optional" order="18.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleByYearHeading" xlink:label="ExpenseExampleByYearHeading" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleByYearHeading" use="optional" order="19.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleNarrativeTextBlock" xlink:label="ExpenseExampleNarrativeTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleNarrativeTextBlock" use="optional" order="20.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleByYearCaption" xlink:label="ExpenseExampleByYearCaption" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleByYearCaption" use="optional" order="21.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleNoRedemptionNarrativeTextBlock" xlink:label="ExpenseExampleNoRedemptionNarrativeTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleNoRedemptionNarrativeTextBlock" use="optional" order="23.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleNoRedemptionByYearCaption" xlink:label="ExpenseExampleNoRedemptionByYearCaption" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleNoRedemptionByYearCaption" use="optional" order="24.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleFootnotesTextBlock" xlink:label="ExpenseExampleFootnotesTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleFootnotesTextBlock" use="optional" order="26.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleClosingTextBlock" xlink:label="ExpenseExampleClosingTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleClosingTextBlock" use="optional" order="27.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PortfolioTurnoverHeading" xlink:label="PortfolioTurnoverHeading" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PortfolioTurnoverHeading" use="optional" order="28.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PortfolioTurnoverTextBlock" xlink:label="PortfolioTurnoverTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PortfolioTurnoverTextBlock" use="optional" order="29.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ShareholderFeesTableTextBlock" xlink:label="ShareholderFeesTableTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ShareholderFeesTableTextBlock" use="optional" order="12.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AnnualFundOperatingExpensesTableTextBlock" xlink:label="AnnualFundOperatingExpensesTableTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="AnnualFundOperatingExpensesTableTextBlock" use="optional" order="14.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleWithRedemptionTableTextBlock" xlink:label="ExpenseExampleWithRedemptionTableTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleWithRedemptionTableTextBlock" use="optional" order="22.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleNoRedemptionTableTextBlock" xlink:label="ExpenseExampleNoRedemptionTableTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleNoRedemptionTableTextBlock" use="optional" order="25.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PortfolioTurnoverRate" xlink:label="PortfolioTurnoverRate" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PortfolioTurnoverRate" order="30.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseBreakpointDiscounts" xlink:label="ExpenseBreakpointDiscounts" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseBreakpointDiscounts" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpensesOtherExpensesHadExtraordinaryExpensesBeenIncluded" xlink:label="ExpensesOtherExpensesHadExtraordinaryExpensesBeenIncluded" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpensesOtherExpensesHadExtraordinaryExpensesBeenIncluded" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpensesRestatedToReflectCurrent" xlink:label="ExpensesRestatedToReflectCurrent" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpensesRestatedToReflectCurrent" order="5.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseBreakpointMinimumInvestmentRequiredAmount" xlink:label="ExpenseBreakpointMinimumInvestmentRequiredAmount" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseBreakpointMinimumInvestmentRequiredAmount" order="6.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_OtherExpensesNewFundBasedOnEstimates" xlink:label="OtherExpensesNewFundBasedOnEstimates" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="OtherExpensesNewFundBasedOnEstimates" order="7.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AcquiredFundFeesAndExpensesBasedOnEstimates" xlink:label="AcquiredFundFeesAndExpensesBasedOnEstimates" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="AcquiredFundFeesAndExpensesBasedOnEstimates" order="8.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpensesNotCorrelatedToRatioDueToAcquiredFundFees" xlink:label="ExpensesNotCorrelatedToRatioDueToAcquiredFundFees" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpensesNotCorrelatedToRatioDueToAcquiredFundFees" order="9.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpensesExplanationOfNonrecurringAccountFee" xlink:label="ExpensesExplanationOfNonrecurringAccountFee" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpensesExplanationOfNonrecurringAccountFee" order="10.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ClassAxis" xlink:label="ClassAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ClassAxis" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ShareClassDomain" xlink:label="ShareClassDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="ShareClassDomain" order="1.0" priority="1" />
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/7/role/N1aSupplement" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:link="http://www.xbrl.org/2003/linkbase">
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_FormN1aAbstract" xlink:label="FormN1aAbstract" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusTable" xlink:label="ProspectusTable" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="FormN1aAbstract" xlink:to="ProspectusTable" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="DocumentInformationDocumentAxis" use="optional" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentDomain" xlink:label="DocumentDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="DocumentInformationDocumentAxis" xlink:to="DocumentDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="CoregistrantAxis" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AllCoregistrantsMember" xlink:label="AllCoregistrantsMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="CoregistrantAxis" xlink:to="AllCoregistrantsMember" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="LegalEntityAxis" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityDomain" xlink:label="EntityDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="EntityDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusLineItems" xlink:label="ProspectusLineItems" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ProspectusLineItems" order="5.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_SupplementToProspectusTextBlock" xlink:label="SupplementToProspectusTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="SupplementToProspectusTextBlock" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ClassAxis" xlink:label="ClassAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ClassAxis" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ShareClassDomain" xlink:label="ShareClassDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="ShareClassDomain" order="1.0" priority="1" />
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/8/role/RiskReturn" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:link="http://www.xbrl.org/2003/linkbase">
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_FormN1aAbstract" xlink:label="FormN1aAbstract" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusTable" xlink:label="ProspectusTable" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="FormN1aAbstract" xlink:to="ProspectusTable" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="DocumentInformationDocumentAxis" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentDomain" xlink:label="DocumentDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="DocumentInformationDocumentAxis" xlink:to="DocumentDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="CoregistrantAxis" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AllCoregistrantsMember" xlink:label="AllCoregistrantsMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="CoregistrantAxis" xlink:to="AllCoregistrantsMember" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="LegalEntityAxis" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityDomain" xlink:label="EntityDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="EntityDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusLineItems" xlink:label="ProspectusLineItems" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ProspectusLineItems" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_RiskReturnHeading" xlink:label="RiskReturnHeading" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="RiskReturnHeading" use="optional" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ObjectiveHeading" xlink:label="ObjectiveHeading" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ObjectiveHeading" use="optional" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ObjectivePrimaryTextBlock" xlink:label="ObjectivePrimaryTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ObjectivePrimaryTextBlock" use="optional" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ObjectiveSecondaryTextBlock" xlink:label="ObjectiveSecondaryTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ObjectiveSecondaryTextBlock" use="optional" order="4.0" priority="1" />
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/8/role/ShareholderFeesData" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:link="http://www.xbrl.org/2003/linkbase">
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusTable" xlink:label="ProspectusTable" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="DocumentInformationDocumentAxis" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentDomain" xlink:label="DocumentDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="DocumentInformationDocumentAxis" xlink:to="DocumentDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="CoregistrantAxis" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AllCoregistrantsMember" xlink:label="AllCoregistrantsMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="CoregistrantAxis" xlink:to="AllCoregistrantsMember" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="LegalEntityAxis" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityDomain" xlink:label="EntityDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="EntityDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusLineItems" xlink:label="ProspectusLineItems" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ProspectusLineItems" order="5.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ShareholderFeesColumnName" xlink:label="ShareholderFeesColumnName" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ShareholderFeesColumnName" use="optional" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_MaximumCumulativeSalesChargeOverOfferingPrice" xlink:label="MaximumCumulativeSalesChargeOverOfferingPrice" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="MaximumCumulativeSalesChargeOverOfferingPrice" use="optional" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_MaximumCumulativeSalesChargeOverOther" xlink:label="MaximumCumulativeSalesChargeOverOther" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="MaximumCumulativeSalesChargeOverOther" use="optional" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice" xlink:label="MaximumSalesChargeImposedOnPurchasesOverOfferingPrice" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="MaximumSalesChargeImposedOnPurchasesOverOfferingPrice" use="optional" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_MaximumDeferredSalesChargeOverOfferingPrice" xlink:label="MaximumDeferredSalesChargeOverOfferingPrice" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="MaximumDeferredSalesChargeOverOfferingPrice" use="optional" order="5.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_MaximumDeferredSalesChargeOverOther" xlink:label="MaximumDeferredSalesChargeOverOther" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="MaximumDeferredSalesChargeOverOther" use="optional" order="6.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther" xlink:label="MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther" use="optional" order="7.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_RedemptionFeeOverRedemption" xlink:label="RedemptionFeeOverRedemption" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="RedemptionFeeOverRedemption" use="optional" order="8.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_RedemptionFee" xlink:label="RedemptionFee" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="RedemptionFee" use="optional" order="9.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExchangeFeeOverRedemption" xlink:label="ExchangeFeeOverRedemption" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExchangeFeeOverRedemption" use="optional" order="10.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExchangeFee" xlink:label="ExchangeFee" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExchangeFee" use="optional" order="11.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_MaximumAccountFeeOverAssets" xlink:label="MaximumAccountFeeOverAssets" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="MaximumAccountFeeOverAssets" use="optional" order="12.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_MaximumAccountFee" xlink:label="MaximumAccountFee" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="MaximumAccountFee" use="optional" order="13.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ShareholderFeeOther" xlink:label="ShareholderFeeOther" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ShareholderFeeOther" use="optional" order="14.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ClassAxis" xlink:label="ClassAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ClassAxis" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ShareClassDomain" xlink:label="ShareClassDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="ShareClassDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ShareholderFeesAbstract" xlink:label="ShareholderFeesAbstract" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ShareholderFeesAbstract" xlink:to="ProspectusTable" order="1.0" priority="1" />
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/8/role/OperatingExpensesData" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:link="http://www.xbrl.org/2003/linkbase">
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_FormN1aAbstract" xlink:label="FormN1aAbstract" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusTable" xlink:label="ProspectusTable" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="FormN1aAbstract" xlink:to="ProspectusTable" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="DocumentInformationDocumentAxis" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentDomain" xlink:label="DocumentDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="DocumentInformationDocumentAxis" xlink:to="DocumentDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="CoregistrantAxis" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AllCoregistrantsMember" xlink:label="AllCoregistrantsMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="CoregistrantAxis" xlink:to="AllCoregistrantsMember" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="LegalEntityAxis" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityDomain" xlink:label="EntityDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="EntityDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusLineItems" xlink:label="ProspectusLineItems" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ProspectusLineItems" order="5.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_OperatingExpensesColumnName" xlink:label="OperatingExpensesColumnName" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="OperatingExpensesColumnName" use="optional" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ManagementFeesOverAssets" xlink:label="ManagementFeesOverAssets" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ManagementFeesOverAssets" use="optional" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_DistributionAndService12b1FeesOverAssets" xlink:label="DistributionAndService12b1FeesOverAssets" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="DistributionAndService12b1FeesOverAssets" use="optional" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_DistributionOrSimilarNon12b1FeesOverAssets" xlink:label="DistributionOrSimilarNon12b1FeesOverAssets" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="DistributionOrSimilarNon12b1FeesOverAssets" use="optional" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_Component1OtherExpensesOverAssets" xlink:label="Component1OtherExpensesOverAssets" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="Component1OtherExpensesOverAssets" use="optional" order="5.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_Component2OtherExpensesOverAssets" xlink:label="Component2OtherExpensesOverAssets" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="Component2OtherExpensesOverAssets" use="optional" order="6.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_Component3OtherExpensesOverAssets" xlink:label="Component3OtherExpensesOverAssets" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="Component3OtherExpensesOverAssets" use="optional" order="7.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_OtherExpensesOverAssets" xlink:label="OtherExpensesOverAssets" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="OtherExpensesOverAssets" use="optional" order="8.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AcquiredFundFeesAndExpensesOverAssets" xlink:label="AcquiredFundFeesAndExpensesOverAssets" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="AcquiredFundFeesAndExpensesOverAssets" use="optional" order="9.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpensesOverAssets" xlink:label="ExpensesOverAssets" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpensesOverAssets" use="optional" order="10.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_FeeWaiverOrReimbursementOverAssets" xlink:label="FeeWaiverOrReimbursementOverAssets" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="FeeWaiverOrReimbursementOverAssets" use="optional" order="11.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_NetExpensesOverAssets" xlink:label="NetExpensesOverAssets" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="NetExpensesOverAssets" use="optional" order="12.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_FeeWaiverOrReimbursementOverAssetsDateOfTermination" xlink:label="FeeWaiverOrReimbursementOverAssetsDateOfTermination" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="FeeWaiverOrReimbursementOverAssetsDateOfTermination" order="13.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ClassAxis" xlink:label="ClassAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ClassAxis" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ShareClassDomain" xlink:label="ShareClassDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="ShareClassDomain" order="1.0" priority="1" />
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/8/role/ExpenseExample" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:link="http://www.xbrl.org/2003/linkbase">
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusTable" xlink:label="ProspectusTable" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="DocumentInformationDocumentAxis" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentDomain" xlink:label="DocumentDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="DocumentInformationDocumentAxis" xlink:to="DocumentDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="CoregistrantAxis" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AllCoregistrantsMember" xlink:label="AllCoregistrantsMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="CoregistrantAxis" xlink:to="AllCoregistrantsMember" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="LegalEntityAxis" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityDomain" xlink:label="EntityDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="EntityDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusLineItems" xlink:label="ProspectusLineItems" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ProspectusLineItems" order="5.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleByYearColumnName" xlink:label="ExpenseExampleByYearColumnName" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleByYearColumnName" use="optional" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleYear01" xlink:label="ExpenseExampleYear01" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleYear01" use="optional" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleYear03" xlink:label="ExpenseExampleYear03" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleYear03" use="optional" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleYear05" xlink:label="ExpenseExampleYear05" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleYear05" use="optional" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleYear10" xlink:label="ExpenseExampleYear10" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleYear10" use="optional" order="5.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ClassAxis" xlink:label="ClassAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ClassAxis" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ShareClassDomain" xlink:label="ShareClassDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="ShareClassDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleAbstract" xlink:label="ExpenseExampleAbstract" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ExpenseExampleAbstract" xlink:to="ProspectusTable" order="1.0" priority="1" />
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/8/role/ExpenseExampleNoRedemption" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:link="http://www.xbrl.org/2003/linkbase">
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusTable" xlink:label="ProspectusTable" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="DocumentInformationDocumentAxis" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentDomain" xlink:label="DocumentDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="DocumentInformationDocumentAxis" xlink:to="DocumentDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="CoregistrantAxis" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AllCoregistrantsMember" xlink:label="AllCoregistrantsMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="CoregistrantAxis" xlink:to="AllCoregistrantsMember" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="LegalEntityAxis" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityDomain" xlink:label="EntityDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="EntityDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusLineItems" xlink:label="ProspectusLineItems" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ProspectusLineItems" order="5.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleNoRedemptionByYearColumnName" xlink:label="ExpenseExampleNoRedemptionByYearColumnName" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleNoRedemptionByYearColumnName" use="optional" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleNoRedemptionYear01" xlink:label="ExpenseExampleNoRedemptionYear01" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleNoRedemptionYear01" use="optional" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleNoRedemptionYear03" xlink:label="ExpenseExampleNoRedemptionYear03" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleNoRedemptionYear03" use="optional" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleNoRedemptionYear05" xlink:label="ExpenseExampleNoRedemptionYear05" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleNoRedemptionYear05" use="optional" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleNoRedemptionYear10" xlink:label="ExpenseExampleNoRedemptionYear10" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleNoRedemptionYear10" use="optional" order="5.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ClassAxis" xlink:label="ClassAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ClassAxis" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ShareClassDomain" xlink:label="ShareClassDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="ShareClassDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleNoRedemptionAbstract" xlink:label="ExpenseExampleNoRedemptionAbstract" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ExpenseExampleNoRedemptionAbstract" xlink:to="ProspectusTable" order="1.0" priority="1" />
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/8/role/BarChartData" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:link="http://www.xbrl.org/2003/linkbase">
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusTable" xlink:label="ProspectusTable" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="DocumentInformationDocumentAxis" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentDomain" xlink:label="DocumentDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="DocumentInformationDocumentAxis" xlink:to="DocumentDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="CoregistrantAxis" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AllCoregistrantsMember" xlink:label="AllCoregistrantsMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="CoregistrantAxis" xlink:to="AllCoregistrantsMember" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="LegalEntityAxis" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityDomain" xlink:label="EntityDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="EntityDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusLineItems" xlink:label="ProspectusLineItems" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ProspectusLineItems" order="5.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AnnualReturnCaption" xlink:label="AnnualReturnCaption" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="AnnualReturnCaption" use="optional" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AnnualReturnColumnName" xlink:label="AnnualReturnColumnName" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="AnnualReturnColumnName" use="optional" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AnnualReturnInceptionDate" xlink:label="AnnualReturnInceptionDate" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="AnnualReturnInceptionDate" use="optional" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AnnlRtrPct" xlink:label="AnnlRtrPct" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="AnnlRtrPct" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ClassAxis" xlink:label="ClassAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ClassAxis" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ShareClassDomain" xlink:label="ShareClassDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="ShareClassDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_BarChartTableAbstract" xlink:label="BarChartTableAbstract" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="BarChartTableAbstract" xlink:to="ProspectusTable" order="1.0" priority="1" />
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/8/role/PerformanceTableData" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:link="http://www.xbrl.org/2003/linkbase">
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusTable" xlink:label="ProspectusTable" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="DocumentInformationDocumentAxis" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentDomain" xlink:label="DocumentDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="DocumentInformationDocumentAxis" xlink:to="DocumentDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="CoregistrantAxis" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AllCoregistrantsMember" xlink:label="AllCoregistrantsMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="CoregistrantAxis" xlink:to="AllCoregistrantsMember" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusLineItems" xlink:label="ProspectusLineItems" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ProspectusLineItems" order="5.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AverageAnnualReturnLabel" xlink:label="AverageAnnualReturnLabel" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="AverageAnnualReturnLabel" use="optional" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AvgAnnlRtrPct" xlink:label="AvgAnnlRtrPct" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="AvgAnnlRtrPct" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerfInceptionDate" xlink:label="PerfInceptionDate" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerfInceptionDate" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ClassAxis" xlink:label="ClassAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ClassAxis" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ShareClassDomain" xlink:label="ShareClassDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="ShareClassDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceMeasureAxis" xlink:label="PerformanceMeasureAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="PerformanceMeasureAxis" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceMeasureDomain" xlink:label="PerformanceMeasureDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="PerformanceMeasureAxis" xlink:to="PerformanceMeasureDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AfterTaxesOnDistributionsMember" xlink:label="AfterTaxesOnDistributionsMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="PerformanceMeasureDomain" xlink:to="AfterTaxesOnDistributionsMember" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AfterTaxesOnDistributionsAndSalesMember" xlink:label="AfterTaxesOnDistributionsAndSalesMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="PerformanceMeasureDomain" xlink:to="AfterTaxesOnDistributionsAndSalesMember" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AverageAnnualReturnAbstract" xlink:label="AverageAnnualReturnAbstract" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="AverageAnnualReturnAbstract" xlink:to="ProspectusTable" order="1.0" priority="1" />
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/8/role/N1aCover" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:link="http://www.xbrl.org/2003/linkbase">
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_FormN1aAbstract" xlink:label="FormN1aAbstract" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusTable" xlink:label="ProspectusTable" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="FormN1aAbstract" xlink:to="ProspectusTable" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="DocumentInformationDocumentAxis" use="optional" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentDomain" xlink:label="DocumentDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="DocumentInformationDocumentAxis" xlink:to="DocumentDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="CoregistrantAxis" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AllCoregistrantsMember" xlink:label="AllCoregistrantsMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="CoregistrantAxis" xlink:to="AllCoregistrantsMember" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusLineItems" xlink:label="ProspectusLineItems" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ProspectusLineItems" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentType" xlink:label="DocumentType" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="DocumentType" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_AmendmentFlag" xlink:label="AmendmentFlag" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="AmendmentFlag" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_AmendmentDescription" xlink:label="AmendmentDescription" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="AmendmentDescription" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityRegistrantName" xlink:label="EntityRegistrantName" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="EntityRegistrantName" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityCentralIndexKey" xlink:label="EntityCentralIndexKey" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="EntityCentralIndexKey" order="5.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityInvCompanyType" xlink:label="EntityInvCompanyType" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="EntityInvCompanyType" order="6.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentPeriodEndDate" xlink:label="DocumentPeriodEndDate" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="DocumentPeriodEndDate" order="7.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusDate" xlink:label="ProspectusDate" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ProspectusDate" order="8.0" priority="1" />
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/8/role/PerformanceManagement" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:link="http://www.xbrl.org/2003/linkbase">
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_FormN1aAbstract" xlink:label="FormN1aAbstract" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusTable" xlink:label="ProspectusTable" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="FormN1aAbstract" xlink:to="ProspectusTable" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="DocumentInformationDocumentAxis" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentDomain" xlink:label="DocumentDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="DocumentInformationDocumentAxis" xlink:to="DocumentDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="CoregistrantAxis" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AllCoregistrantsMember" xlink:label="AllCoregistrantsMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="CoregistrantAxis" xlink:to="AllCoregistrantsMember" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="LegalEntityAxis" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityDomain" xlink:label="EntityDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="EntityDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusLineItems" xlink:label="ProspectusLineItems" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ProspectusLineItems" order="5.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_BarChartAndPerformanceTableHeading" xlink:label="BarChartAndPerformanceTableHeading" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="BarChartAndPerformanceTableHeading" use="optional" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceNarrativeTextBlock" xlink:label="PerformanceNarrativeTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformanceNarrativeTextBlock" use="optional" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_BarChartNarrativeTextBlock" xlink:label="BarChartNarrativeTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="BarChartNarrativeTextBlock" use="optional" order="7.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_BarChartHeading" xlink:label="BarChartHeading" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="BarChartHeading" use="optional" order="11.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_BarChartFootnotesTextBlock" xlink:label="BarChartFootnotesTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="BarChartFootnotesTextBlock" use="optional" order="13.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_BarChartClosingTextBlock" xlink:label="BarChartClosingTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="BarChartClosingTextBlock" use="optional" order="14.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceTableHeading" xlink:label="PerformanceTableHeading" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformanceTableHeading" use="optional" order="24.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceTableNarrativeTextBlock" xlink:label="PerformanceTableNarrativeTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformanceTableNarrativeTextBlock" use="optional" order="25.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceTableClosingTextBlock" xlink:label="PerformanceTableClosingTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformanceTableClosingTextBlock" use="optional" order="39.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_BarChartTableTextBlock" xlink:label="BarChartTableTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="BarChartTableTextBlock" use="optional" order="12.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceTableTextBlock" xlink:label="PerformanceTableTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformanceTableTextBlock" use="optional" order="31.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_MarketIndexPerformanceTableTextBlock" xlink:label="MarketIndexPerformanceTableTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="MarketIndexPerformanceTableTextBlock" use="optional" order="34.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_MoneyMarketSevenDayYieldCaption" xlink:label="MoneyMarketSevenDayYieldCaption" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="MoneyMarketSevenDayYieldCaption" order="40.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_MoneyMarketSevenDayYieldColumnName" xlink:label="MoneyMarketSevenDayYieldColumnName" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="MoneyMarketSevenDayYieldColumnName" order="41.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_MoneyMarketSevenDayYieldPhone" xlink:label="MoneyMarketSevenDayYieldPhone" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="MoneyMarketSevenDayYieldPhone" order="42.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_MoneyMarketSevenDayYield" xlink:label="MoneyMarketSevenDayYield" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="MoneyMarketSevenDayYield" order="43.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_MoneyMarketSevenDayTaxEquivalentYield" xlink:label="MoneyMarketSevenDayTaxEquivalentYield" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="MoneyMarketSevenDayTaxEquivalentYield" order="44.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ThirtyDayYieldCaption" xlink:label="ThirtyDayYieldCaption" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ThirtyDayYieldCaption" order="45.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ThirtyDayYieldColumnName" xlink:label="ThirtyDayYieldColumnName" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ThirtyDayYieldColumnName" order="46.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ThirtyDayYieldPhone" xlink:label="ThirtyDayYieldPhone" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ThirtyDayYieldPhone" order="47.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ThirtyDayYield" xlink:label="ThirtyDayYield" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ThirtyDayYield" order="48.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ThirtyDayTaxEquivalentYield" xlink:label="ThirtyDayTaxEquivalentYield" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ThirtyDayTaxEquivalentYield" order="49.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceAvailabilityWebSiteAddress" xlink:label="PerformanceAvailabilityWebSiteAddress" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformanceAvailabilityWebSiteAddress" order="50.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceAvailabilityPhone" xlink:label="PerformanceAvailabilityPhone" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformanceAvailabilityPhone" order="51.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceTableFootnotesTextBlock" xlink:label="PerformanceTableFootnotesTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformanceTableFootnotesTextBlock" use="optional" order="35.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceTableFootnotesReasonPerformanceInformationForClassDifferentFromImmediatelyPrecedingPeriod" xlink:label="PerformanceTableFootnotesReasonPerformanceInformationForClassDifferentFromImmediatelyPrecedingPeriod" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformanceTableFootnotesReasonPerformanceInformationForClassDifferentFromImmediatelyPrecedingPeriod" order="36.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceTableOneClassOfAfterTaxShown" xlink:label="PerformanceTableOneClassOfAfterTaxShown" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformanceTableOneClassOfAfterTaxShown" order="37.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_IndexNoDeductionForFeesExpensesTaxes" xlink:label="IndexNoDeductionForFeesExpensesTaxes" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="IndexNoDeductionForFeesExpensesTaxes" order="38.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AverageAnnualReturnCaption" xlink:label="AverageAnnualReturnCaption" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="AverageAnnualReturnCaption" order="32.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AverageAnnualReturnColumnName" xlink:label="AverageAnnualReturnColumnName" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="AverageAnnualReturnColumnName" order="33.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceTableDoesReflectSalesLoads" xlink:label="PerformanceTableDoesReflectSalesLoads" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformanceTableDoesReflectSalesLoads" order="26.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceTableMarketIndexChanged" xlink:label="PerformanceTableMarketIndexChanged" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformanceTableMarketIndexChanged" order="27.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceTableUsesHighestFederalRate" xlink:label="PerformanceTableUsesHighestFederalRate" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformanceTableUsesHighestFederalRate" order="28.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceTableNotRelevantToTaxDeferred" xlink:label="PerformanceTableNotRelevantToTaxDeferred" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformanceTableNotRelevantToTaxDeferred" order="29.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceTableExplanationAfterTaxHigher" xlink:label="PerformanceTableExplanationAfterTaxHigher" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformanceTableExplanationAfterTaxHigher" order="30.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_YearToDateReturnLabel" xlink:label="YearToDateReturnLabel" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="YearToDateReturnLabel" order="15.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_BarChartYearToDateReturn" xlink:label="BarChartYearToDateReturn" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="BarChartYearToDateReturn" order="16.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_BarChartYearToDateReturnDate" xlink:label="BarChartYearToDateReturnDate" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="BarChartYearToDateReturnDate" order="17.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_HighestQuarterlyReturnLabel" xlink:label="HighestQuarterlyReturnLabel" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="HighestQuarterlyReturnLabel" order="18.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_BarChartHighestQuarterlyReturn" xlink:label="BarChartHighestQuarterlyReturn" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="BarChartHighestQuarterlyReturn" order="19.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_BarChartHighestQuarterlyReturnDate" xlink:label="BarChartHighestQuarterlyReturnDate" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="BarChartHighestQuarterlyReturnDate" order="20.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_LowestQuarterlyReturnLabel" xlink:label="LowestQuarterlyReturnLabel" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="LowestQuarterlyReturnLabel" order="21.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_BarChartLowestQuarterlyReturn" xlink:label="BarChartLowestQuarterlyReturn" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="BarChartLowestQuarterlyReturn" order="22.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_BarChartLowestQuarterlyReturnDate" xlink:label="BarChartLowestQuarterlyReturnDate" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="BarChartLowestQuarterlyReturnDate" order="23.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_BarChartDoesNotReflectSalesLoads" xlink:label="BarChartDoesNotReflectSalesLoads" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="BarChartDoesNotReflectSalesLoads" order="8.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_BarChartReturnsForClassNotOfferedInProspectus" xlink:label="BarChartReturnsForClassNotOfferedInProspectus" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="BarChartReturnsForClassNotOfferedInProspectus" order="9.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_BarChartReasonSelectedClassDifferentFromImmediatelyPrecedingPeriod" xlink:label="BarChartReasonSelectedClassDifferentFromImmediatelyPrecedingPeriod" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="BarChartReasonSelectedClassDifferentFromImmediatelyPrecedingPeriod" order="10.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformancePastDoesNotIndicateFuture" xlink:label="PerformancePastDoesNotIndicateFuture" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformancePastDoesNotIndicateFuture" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceInformationIllustratesVariabilityOfReturns" xlink:label="PerformanceInformationIllustratesVariabilityOfReturns" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformanceInformationIllustratesVariabilityOfReturns" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceOneYearOrLess" xlink:label="PerformanceOneYearOrLess" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformanceOneYearOrLess" order="5.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceAdditionalMarketIndex" xlink:label="PerformanceAdditionalMarketIndex" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformanceAdditionalMarketIndex" order="6.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ClassAxis" xlink:label="ClassAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ClassAxis" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ShareClassDomain" xlink:label="ShareClassDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="ShareClassDomain" order="1.0" priority="1" />
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/8/role/InvestmentRisks" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:link="http://www.xbrl.org/2003/linkbase">
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusTable" xlink:label="ProspectusTable" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="DocumentInformationDocumentAxis" use="optional" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentDomain" xlink:label="DocumentDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="DocumentInformationDocumentAxis" xlink:to="DocumentDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="CoregistrantAxis" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AllCoregistrantsMember" xlink:label="AllCoregistrantsMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="CoregistrantAxis" xlink:to="AllCoregistrantsMember" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="LegalEntityAxis" use="optional" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityDomain" xlink:label="EntityDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="EntityDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusLineItems" xlink:label="ProspectusLineItems" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ProspectusLineItems" order="5.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_RiskTextBlock" xlink:label="RiskTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="RiskTextBlock" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_RiskAxis" xlink:label="RiskAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="RiskAxis" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AllRisksMember" xlink:label="AllRisksMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="RiskAxis" xlink:to="AllRisksMember" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_RiskLoseMoneyMember" xlink:label="RiskLoseMoneyMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="RiskAxis" xlink:to="RiskLoseMoneyMember" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_RiskNotInsuredDepositoryInstitutionMember" xlink:label="RiskNotInsuredDepositoryInstitutionMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="RiskAxis" xlink:to="RiskNotInsuredDepositoryInstitutionMember" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_RiskNotInsuredMember" xlink:label="RiskNotInsuredMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="RiskAxis" xlink:to="RiskNotInsuredMember" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_RiskNondiversifiedStatusMember" xlink:label="RiskNondiversifiedStatusMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="RiskAxis" xlink:to="RiskNondiversifiedStatusMember" order="5.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_RiskMoneyMarketFundPriceFluctuatesMember" xlink:label="RiskMoneyMarketFundPriceFluctuatesMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="RiskAxis" xlink:to="RiskMoneyMarketFundPriceFluctuatesMember" order="6.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_RiskMoneyMarketFundMayImposeFeesOrSuspendSalesMember" xlink:label="RiskMoneyMarketFundMayImposeFeesOrSuspendSalesMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="RiskAxis" xlink:to="RiskMoneyMarketFundMayImposeFeesOrSuspendSalesMember" order="7.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_RiskMoneyMarketFundMayNotPreserveDollarMember" xlink:label="RiskMoneyMarketFundMayNotPreserveDollarMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="RiskAxis" xlink:to="RiskMoneyMarketFundMayNotPreserveDollarMember" order="8.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_RiskMoneyMarketFundSponsorMayNotProvideSupportMember" xlink:label="RiskMoneyMarketFundSponsorMayNotProvideSupportMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="RiskAxis" xlink:to="RiskMoneyMarketFundSponsorMayNotProvideSupportMember" order="9.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_RisksAbstract" xlink:label="RisksAbstract" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="RisksAbstract" xlink:to="ProspectusTable" use="optional" order="1.0" priority="1" />
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/8/role/InvestmentStrategy" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:link="http://www.xbrl.org/2003/linkbase">
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_FormN1aAbstract" xlink:label="FormN1aAbstract" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusTable" xlink:label="ProspectusTable" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="FormN1aAbstract" xlink:to="ProspectusTable" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="DocumentInformationDocumentAxis" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentDomain" xlink:label="DocumentDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="DocumentInformationDocumentAxis" xlink:to="DocumentDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="CoregistrantAxis" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AllCoregistrantsMember" xlink:label="AllCoregistrantsMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="CoregistrantAxis" xlink:to="AllCoregistrantsMember" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="LegalEntityAxis" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityDomain" xlink:label="EntityDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="EntityDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusLineItems" xlink:label="ProspectusLineItems" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ProspectusLineItems" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_StrategyHeading" xlink:label="StrategyHeading" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="StrategyHeading" use="optional" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_StrategyNarrativeTextBlock" xlink:label="StrategyNarrativeTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="StrategyNarrativeTextBlock" use="optional" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_StrategyPortfolioConcentration" xlink:label="StrategyPortfolioConcentration" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="StrategyPortfolioConcentration" order="3.0" priority="1" />
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/8/role/FeesAndExpenses" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:link="http://www.xbrl.org/2003/linkbase">
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_FormN1aAbstract" xlink:label="FormN1aAbstract" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusTable" xlink:label="ProspectusTable" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="FormN1aAbstract" xlink:to="ProspectusTable" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="DocumentInformationDocumentAxis" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentDomain" xlink:label="DocumentDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="DocumentInformationDocumentAxis" xlink:to="DocumentDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="CoregistrantAxis" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AllCoregistrantsMember" xlink:label="AllCoregistrantsMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="CoregistrantAxis" xlink:to="AllCoregistrantsMember" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="LegalEntityAxis" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityDomain" xlink:label="EntityDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="EntityDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusLineItems" xlink:label="ProspectusLineItems" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ProspectusLineItems" order="5.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseHeading" xlink:label="ExpenseHeading" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseHeading" use="optional" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseNarrativeTextBlock" xlink:label="ExpenseNarrativeTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseNarrativeTextBlock" use="optional" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ShareholderFeesCaption" xlink:label="ShareholderFeesCaption" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ShareholderFeesCaption" use="optional" order="11.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_OperatingExpensesCaption" xlink:label="OperatingExpensesCaption" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="OperatingExpensesCaption" use="optional" order="13.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseFootnotesTextBlock" xlink:label="ExpenseFootnotesTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseFootnotesTextBlock" use="optional" order="15.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpensesDeferredChargesTextBlock" xlink:label="ExpensesDeferredChargesTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpensesDeferredChargesTextBlock" use="optional" order="16.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpensesRangeOfExchangeFeesTextBlock" xlink:label="ExpensesRangeOfExchangeFeesTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpensesRangeOfExchangeFeesTextBlock" use="optional" order="17.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleHeading" xlink:label="ExpenseExampleHeading" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleHeading" use="optional" order="18.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleByYearHeading" xlink:label="ExpenseExampleByYearHeading" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleByYearHeading" use="optional" order="19.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleNarrativeTextBlock" xlink:label="ExpenseExampleNarrativeTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleNarrativeTextBlock" use="optional" order="20.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleByYearCaption" xlink:label="ExpenseExampleByYearCaption" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleByYearCaption" use="optional" order="21.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleNoRedemptionNarrativeTextBlock" xlink:label="ExpenseExampleNoRedemptionNarrativeTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleNoRedemptionNarrativeTextBlock" use="optional" order="23.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleNoRedemptionByYearCaption" xlink:label="ExpenseExampleNoRedemptionByYearCaption" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleNoRedemptionByYearCaption" use="optional" order="24.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleFootnotesTextBlock" xlink:label="ExpenseExampleFootnotesTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleFootnotesTextBlock" use="optional" order="26.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleClosingTextBlock" xlink:label="ExpenseExampleClosingTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleClosingTextBlock" use="optional" order="27.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PortfolioTurnoverHeading" xlink:label="PortfolioTurnoverHeading" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PortfolioTurnoverHeading" use="optional" order="28.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PortfolioTurnoverTextBlock" xlink:label="PortfolioTurnoverTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PortfolioTurnoverTextBlock" use="optional" order="29.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ShareholderFeesTableTextBlock" xlink:label="ShareholderFeesTableTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ShareholderFeesTableTextBlock" use="optional" order="12.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AnnualFundOperatingExpensesTableTextBlock" xlink:label="AnnualFundOperatingExpensesTableTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="AnnualFundOperatingExpensesTableTextBlock" use="optional" order="14.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleWithRedemptionTableTextBlock" xlink:label="ExpenseExampleWithRedemptionTableTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleWithRedemptionTableTextBlock" use="optional" order="22.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleNoRedemptionTableTextBlock" xlink:label="ExpenseExampleNoRedemptionTableTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleNoRedemptionTableTextBlock" use="optional" order="25.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PortfolioTurnoverRate" xlink:label="PortfolioTurnoverRate" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PortfolioTurnoverRate" order="30.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseBreakpointDiscounts" xlink:label="ExpenseBreakpointDiscounts" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseBreakpointDiscounts" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpensesOtherExpensesHadExtraordinaryExpensesBeenIncluded" xlink:label="ExpensesOtherExpensesHadExtraordinaryExpensesBeenIncluded" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpensesOtherExpensesHadExtraordinaryExpensesBeenIncluded" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpensesRestatedToReflectCurrent" xlink:label="ExpensesRestatedToReflectCurrent" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpensesRestatedToReflectCurrent" order="5.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseBreakpointMinimumInvestmentRequiredAmount" xlink:label="ExpenseBreakpointMinimumInvestmentRequiredAmount" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseBreakpointMinimumInvestmentRequiredAmount" order="6.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_OtherExpensesNewFundBasedOnEstimates" xlink:label="OtherExpensesNewFundBasedOnEstimates" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="OtherExpensesNewFundBasedOnEstimates" order="7.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AcquiredFundFeesAndExpensesBasedOnEstimates" xlink:label="AcquiredFundFeesAndExpensesBasedOnEstimates" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="AcquiredFundFeesAndExpensesBasedOnEstimates" order="8.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpensesNotCorrelatedToRatioDueToAcquiredFundFees" xlink:label="ExpensesNotCorrelatedToRatioDueToAcquiredFundFees" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpensesNotCorrelatedToRatioDueToAcquiredFundFees" order="9.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpensesExplanationOfNonrecurringAccountFee" xlink:label="ExpensesExplanationOfNonrecurringAccountFee" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpensesExplanationOfNonrecurringAccountFee" order="10.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ClassAxis" xlink:label="ClassAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ClassAxis" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ShareClassDomain" xlink:label="ShareClassDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="ShareClassDomain" order="1.0" priority="1" />
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/8/role/N1aSupplement" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:link="http://www.xbrl.org/2003/linkbase">
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_FormN1aAbstract" xlink:label="FormN1aAbstract" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusTable" xlink:label="ProspectusTable" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="FormN1aAbstract" xlink:to="ProspectusTable" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="DocumentInformationDocumentAxis" use="optional" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentDomain" xlink:label="DocumentDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="DocumentInformationDocumentAxis" xlink:to="DocumentDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="CoregistrantAxis" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AllCoregistrantsMember" xlink:label="AllCoregistrantsMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="CoregistrantAxis" xlink:to="AllCoregistrantsMember" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="LegalEntityAxis" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityDomain" xlink:label="EntityDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="EntityDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusLineItems" xlink:label="ProspectusLineItems" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ProspectusLineItems" order="5.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_SupplementToProspectusTextBlock" xlink:label="SupplementToProspectusTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="SupplementToProspectusTextBlock" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ClassAxis" xlink:label="ClassAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ClassAxis" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ShareClassDomain" xlink:label="ShareClassDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="ShareClassDomain" order="1.0" priority="1" />
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/9/role/RiskReturn" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:link="http://www.xbrl.org/2003/linkbase">
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_FormN1aAbstract" xlink:label="FormN1aAbstract" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusTable" xlink:label="ProspectusTable" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="FormN1aAbstract" xlink:to="ProspectusTable" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="DocumentInformationDocumentAxis" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentDomain" xlink:label="DocumentDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="DocumentInformationDocumentAxis" xlink:to="DocumentDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="CoregistrantAxis" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AllCoregistrantsMember" xlink:label="AllCoregistrantsMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="CoregistrantAxis" xlink:to="AllCoregistrantsMember" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="LegalEntityAxis" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityDomain" xlink:label="EntityDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="EntityDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusLineItems" xlink:label="ProspectusLineItems" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ProspectusLineItems" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_RiskReturnHeading" xlink:label="RiskReturnHeading" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="RiskReturnHeading" use="optional" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ObjectiveHeading" xlink:label="ObjectiveHeading" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ObjectiveHeading" use="optional" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ObjectivePrimaryTextBlock" xlink:label="ObjectivePrimaryTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ObjectivePrimaryTextBlock" use="optional" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ObjectiveSecondaryTextBlock" xlink:label="ObjectiveSecondaryTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ObjectiveSecondaryTextBlock" use="optional" order="4.0" priority="1" />
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/9/role/ShareholderFeesData" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:link="http://www.xbrl.org/2003/linkbase">
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusTable" xlink:label="ProspectusTable" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="DocumentInformationDocumentAxis" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentDomain" xlink:label="DocumentDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="DocumentInformationDocumentAxis" xlink:to="DocumentDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="CoregistrantAxis" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AllCoregistrantsMember" xlink:label="AllCoregistrantsMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="CoregistrantAxis" xlink:to="AllCoregistrantsMember" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="LegalEntityAxis" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityDomain" xlink:label="EntityDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="EntityDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusLineItems" xlink:label="ProspectusLineItems" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ProspectusLineItems" order="5.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ShareholderFeesColumnName" xlink:label="ShareholderFeesColumnName" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ShareholderFeesColumnName" use="optional" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_MaximumCumulativeSalesChargeOverOfferingPrice" xlink:label="MaximumCumulativeSalesChargeOverOfferingPrice" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="MaximumCumulativeSalesChargeOverOfferingPrice" use="optional" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_MaximumCumulativeSalesChargeOverOther" xlink:label="MaximumCumulativeSalesChargeOverOther" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="MaximumCumulativeSalesChargeOverOther" use="optional" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice" xlink:label="MaximumSalesChargeImposedOnPurchasesOverOfferingPrice" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="MaximumSalesChargeImposedOnPurchasesOverOfferingPrice" use="optional" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_MaximumDeferredSalesChargeOverOfferingPrice" xlink:label="MaximumDeferredSalesChargeOverOfferingPrice" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="MaximumDeferredSalesChargeOverOfferingPrice" use="optional" order="5.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_MaximumDeferredSalesChargeOverOther" xlink:label="MaximumDeferredSalesChargeOverOther" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="MaximumDeferredSalesChargeOverOther" use="optional" order="6.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther" xlink:label="MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther" use="optional" order="7.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_RedemptionFeeOverRedemption" xlink:label="RedemptionFeeOverRedemption" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="RedemptionFeeOverRedemption" use="optional" order="8.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_RedemptionFee" xlink:label="RedemptionFee" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="RedemptionFee" use="optional" order="9.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExchangeFeeOverRedemption" xlink:label="ExchangeFeeOverRedemption" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExchangeFeeOverRedemption" use="optional" order="10.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExchangeFee" xlink:label="ExchangeFee" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExchangeFee" use="optional" order="11.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_MaximumAccountFeeOverAssets" xlink:label="MaximumAccountFeeOverAssets" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="MaximumAccountFeeOverAssets" use="optional" order="12.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_MaximumAccountFee" xlink:label="MaximumAccountFee" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="MaximumAccountFee" use="optional" order="13.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ShareholderFeeOther" xlink:label="ShareholderFeeOther" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ShareholderFeeOther" use="optional" order="14.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ClassAxis" xlink:label="ClassAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ClassAxis" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ShareClassDomain" xlink:label="ShareClassDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="ShareClassDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ShareholderFeesAbstract" xlink:label="ShareholderFeesAbstract" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ShareholderFeesAbstract" xlink:to="ProspectusTable" order="1.0" priority="1" />
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/9/role/OperatingExpensesData" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:link="http://www.xbrl.org/2003/linkbase">
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_FormN1aAbstract" xlink:label="FormN1aAbstract" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusTable" xlink:label="ProspectusTable" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="FormN1aAbstract" xlink:to="ProspectusTable" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="DocumentInformationDocumentAxis" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentDomain" xlink:label="DocumentDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="DocumentInformationDocumentAxis" xlink:to="DocumentDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="CoregistrantAxis" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AllCoregistrantsMember" xlink:label="AllCoregistrantsMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="CoregistrantAxis" xlink:to="AllCoregistrantsMember" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="LegalEntityAxis" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityDomain" xlink:label="EntityDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="EntityDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusLineItems" xlink:label="ProspectusLineItems" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ProspectusLineItems" order="5.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_OperatingExpensesColumnName" xlink:label="OperatingExpensesColumnName" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="OperatingExpensesColumnName" use="optional" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ManagementFeesOverAssets" xlink:label="ManagementFeesOverAssets" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ManagementFeesOverAssets" use="optional" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_DistributionAndService12b1FeesOverAssets" xlink:label="DistributionAndService12b1FeesOverAssets" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="DistributionAndService12b1FeesOverAssets" use="optional" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_DistributionOrSimilarNon12b1FeesOverAssets" xlink:label="DistributionOrSimilarNon12b1FeesOverAssets" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="DistributionOrSimilarNon12b1FeesOverAssets" use="optional" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_Component1OtherExpensesOverAssets" xlink:label="Component1OtherExpensesOverAssets" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="Component1OtherExpensesOverAssets" use="optional" order="5.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_Component2OtherExpensesOverAssets" xlink:label="Component2OtherExpensesOverAssets" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="Component2OtherExpensesOverAssets" use="optional" order="6.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_Component3OtherExpensesOverAssets" xlink:label="Component3OtherExpensesOverAssets" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="Component3OtherExpensesOverAssets" use="optional" order="7.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_OtherExpensesOverAssets" xlink:label="OtherExpensesOverAssets" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="OtherExpensesOverAssets" use="optional" order="8.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AcquiredFundFeesAndExpensesOverAssets" xlink:label="AcquiredFundFeesAndExpensesOverAssets" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="AcquiredFundFeesAndExpensesOverAssets" use="optional" order="9.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpensesOverAssets" xlink:label="ExpensesOverAssets" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpensesOverAssets" use="optional" order="10.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_FeeWaiverOrReimbursementOverAssets" xlink:label="FeeWaiverOrReimbursementOverAssets" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="FeeWaiverOrReimbursementOverAssets" use="optional" order="11.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_NetExpensesOverAssets" xlink:label="NetExpensesOverAssets" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="NetExpensesOverAssets" use="optional" order="12.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_FeeWaiverOrReimbursementOverAssetsDateOfTermination" xlink:label="FeeWaiverOrReimbursementOverAssetsDateOfTermination" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="FeeWaiverOrReimbursementOverAssetsDateOfTermination" order="13.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ClassAxis" xlink:label="ClassAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ClassAxis" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ShareClassDomain" xlink:label="ShareClassDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="ShareClassDomain" order="1.0" priority="1" />
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/9/role/ExpenseExample" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:link="http://www.xbrl.org/2003/linkbase">
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusTable" xlink:label="ProspectusTable" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="DocumentInformationDocumentAxis" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentDomain" xlink:label="DocumentDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="DocumentInformationDocumentAxis" xlink:to="DocumentDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="CoregistrantAxis" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AllCoregistrantsMember" xlink:label="AllCoregistrantsMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="CoregistrantAxis" xlink:to="AllCoregistrantsMember" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="LegalEntityAxis" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityDomain" xlink:label="EntityDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="EntityDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusLineItems" xlink:label="ProspectusLineItems" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ProspectusLineItems" order="5.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleByYearColumnName" xlink:label="ExpenseExampleByYearColumnName" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleByYearColumnName" use="optional" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleYear01" xlink:label="ExpenseExampleYear01" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleYear01" use="optional" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleYear03" xlink:label="ExpenseExampleYear03" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleYear03" use="optional" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleYear05" xlink:label="ExpenseExampleYear05" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleYear05" use="optional" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleYear10" xlink:label="ExpenseExampleYear10" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleYear10" use="optional" order="5.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ClassAxis" xlink:label="ClassAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ClassAxis" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ShareClassDomain" xlink:label="ShareClassDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="ShareClassDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleAbstract" xlink:label="ExpenseExampleAbstract" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ExpenseExampleAbstract" xlink:to="ProspectusTable" order="1.0" priority="1" />
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/9/role/ExpenseExampleNoRedemption" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:link="http://www.xbrl.org/2003/linkbase">
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusTable" xlink:label="ProspectusTable" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="DocumentInformationDocumentAxis" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentDomain" xlink:label="DocumentDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="DocumentInformationDocumentAxis" xlink:to="DocumentDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="CoregistrantAxis" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AllCoregistrantsMember" xlink:label="AllCoregistrantsMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="CoregistrantAxis" xlink:to="AllCoregistrantsMember" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="LegalEntityAxis" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityDomain" xlink:label="EntityDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="EntityDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusLineItems" xlink:label="ProspectusLineItems" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ProspectusLineItems" order="5.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleNoRedemptionByYearColumnName" xlink:label="ExpenseExampleNoRedemptionByYearColumnName" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleNoRedemptionByYearColumnName" use="optional" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleNoRedemptionYear01" xlink:label="ExpenseExampleNoRedemptionYear01" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleNoRedemptionYear01" use="optional" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleNoRedemptionYear03" xlink:label="ExpenseExampleNoRedemptionYear03" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleNoRedemptionYear03" use="optional" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleNoRedemptionYear05" xlink:label="ExpenseExampleNoRedemptionYear05" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleNoRedemptionYear05" use="optional" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleNoRedemptionYear10" xlink:label="ExpenseExampleNoRedemptionYear10" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleNoRedemptionYear10" use="optional" order="5.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ClassAxis" xlink:label="ClassAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ClassAxis" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ShareClassDomain" xlink:label="ShareClassDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="ShareClassDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleNoRedemptionAbstract" xlink:label="ExpenseExampleNoRedemptionAbstract" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ExpenseExampleNoRedemptionAbstract" xlink:to="ProspectusTable" order="1.0" priority="1" />
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/9/role/BarChartData" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:link="http://www.xbrl.org/2003/linkbase">
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusTable" xlink:label="ProspectusTable" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="DocumentInformationDocumentAxis" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentDomain" xlink:label="DocumentDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="DocumentInformationDocumentAxis" xlink:to="DocumentDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="CoregistrantAxis" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AllCoregistrantsMember" xlink:label="AllCoregistrantsMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="CoregistrantAxis" xlink:to="AllCoregistrantsMember" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="LegalEntityAxis" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityDomain" xlink:label="EntityDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="EntityDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusLineItems" xlink:label="ProspectusLineItems" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ProspectusLineItems" order="5.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AnnualReturnCaption" xlink:label="AnnualReturnCaption" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="AnnualReturnCaption" use="optional" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AnnualReturnColumnName" xlink:label="AnnualReturnColumnName" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="AnnualReturnColumnName" use="optional" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AnnualReturnInceptionDate" xlink:label="AnnualReturnInceptionDate" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="AnnualReturnInceptionDate" use="optional" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AnnlRtrPct" xlink:label="AnnlRtrPct" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="AnnlRtrPct" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ClassAxis" xlink:label="ClassAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ClassAxis" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ShareClassDomain" xlink:label="ShareClassDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="ShareClassDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_BarChartTableAbstract" xlink:label="BarChartTableAbstract" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="BarChartTableAbstract" xlink:to="ProspectusTable" order="1.0" priority="1" />
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/9/role/PerformanceTableData" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:link="http://www.xbrl.org/2003/linkbase">
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusTable" xlink:label="ProspectusTable" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="DocumentInformationDocumentAxis" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentDomain" xlink:label="DocumentDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="DocumentInformationDocumentAxis" xlink:to="DocumentDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="CoregistrantAxis" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AllCoregistrantsMember" xlink:label="AllCoregistrantsMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="CoregistrantAxis" xlink:to="AllCoregistrantsMember" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusLineItems" xlink:label="ProspectusLineItems" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ProspectusLineItems" order="5.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AverageAnnualReturnLabel" xlink:label="AverageAnnualReturnLabel" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="AverageAnnualReturnLabel" use="optional" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AvgAnnlRtrPct" xlink:label="AvgAnnlRtrPct" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="AvgAnnlRtrPct" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerfInceptionDate" xlink:label="PerfInceptionDate" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerfInceptionDate" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ClassAxis" xlink:label="ClassAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ClassAxis" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ShareClassDomain" xlink:label="ShareClassDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="ShareClassDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceMeasureAxis" xlink:label="PerformanceMeasureAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="PerformanceMeasureAxis" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceMeasureDomain" xlink:label="PerformanceMeasureDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="PerformanceMeasureAxis" xlink:to="PerformanceMeasureDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AfterTaxesOnDistributionsMember" xlink:label="AfterTaxesOnDistributionsMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="PerformanceMeasureDomain" xlink:to="AfterTaxesOnDistributionsMember" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AfterTaxesOnDistributionsAndSalesMember" xlink:label="AfterTaxesOnDistributionsAndSalesMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="PerformanceMeasureDomain" xlink:to="AfterTaxesOnDistributionsAndSalesMember" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AverageAnnualReturnAbstract" xlink:label="AverageAnnualReturnAbstract" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="AverageAnnualReturnAbstract" xlink:to="ProspectusTable" order="1.0" priority="1" />
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/9/role/N1aCover" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:link="http://www.xbrl.org/2003/linkbase">
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_FormN1aAbstract" xlink:label="FormN1aAbstract" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusTable" xlink:label="ProspectusTable" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="FormN1aAbstract" xlink:to="ProspectusTable" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="DocumentInformationDocumentAxis" use="optional" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentDomain" xlink:label="DocumentDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="DocumentInformationDocumentAxis" xlink:to="DocumentDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="CoregistrantAxis" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AllCoregistrantsMember" xlink:label="AllCoregistrantsMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="CoregistrantAxis" xlink:to="AllCoregistrantsMember" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusLineItems" xlink:label="ProspectusLineItems" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ProspectusLineItems" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentType" xlink:label="DocumentType" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="DocumentType" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_AmendmentFlag" xlink:label="AmendmentFlag" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="AmendmentFlag" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_AmendmentDescription" xlink:label="AmendmentDescription" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="AmendmentDescription" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityRegistrantName" xlink:label="EntityRegistrantName" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="EntityRegistrantName" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityCentralIndexKey" xlink:label="EntityCentralIndexKey" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="EntityCentralIndexKey" order="5.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityInvCompanyType" xlink:label="EntityInvCompanyType" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="EntityInvCompanyType" order="6.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentPeriodEndDate" xlink:label="DocumentPeriodEndDate" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="DocumentPeriodEndDate" order="7.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusDate" xlink:label="ProspectusDate" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ProspectusDate" order="8.0" priority="1" />
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/9/role/PerformanceManagement" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:link="http://www.xbrl.org/2003/linkbase">
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_FormN1aAbstract" xlink:label="FormN1aAbstract" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusTable" xlink:label="ProspectusTable" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="FormN1aAbstract" xlink:to="ProspectusTable" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="DocumentInformationDocumentAxis" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentDomain" xlink:label="DocumentDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="DocumentInformationDocumentAxis" xlink:to="DocumentDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="CoregistrantAxis" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AllCoregistrantsMember" xlink:label="AllCoregistrantsMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="CoregistrantAxis" xlink:to="AllCoregistrantsMember" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="LegalEntityAxis" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityDomain" xlink:label="EntityDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="EntityDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusLineItems" xlink:label="ProspectusLineItems" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ProspectusLineItems" order="5.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_BarChartAndPerformanceTableHeading" xlink:label="BarChartAndPerformanceTableHeading" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="BarChartAndPerformanceTableHeading" use="optional" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceNarrativeTextBlock" xlink:label="PerformanceNarrativeTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformanceNarrativeTextBlock" use="optional" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_BarChartNarrativeTextBlock" xlink:label="BarChartNarrativeTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="BarChartNarrativeTextBlock" use="optional" order="7.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_BarChartHeading" xlink:label="BarChartHeading" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="BarChartHeading" use="optional" order="11.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_BarChartFootnotesTextBlock" xlink:label="BarChartFootnotesTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="BarChartFootnotesTextBlock" use="optional" order="13.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_BarChartClosingTextBlock" xlink:label="BarChartClosingTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="BarChartClosingTextBlock" use="optional" order="14.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceTableHeading" xlink:label="PerformanceTableHeading" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformanceTableHeading" use="optional" order="24.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceTableNarrativeTextBlock" xlink:label="PerformanceTableNarrativeTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformanceTableNarrativeTextBlock" use="optional" order="25.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceTableClosingTextBlock" xlink:label="PerformanceTableClosingTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformanceTableClosingTextBlock" use="optional" order="39.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_BarChartTableTextBlock" xlink:label="BarChartTableTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="BarChartTableTextBlock" use="optional" order="12.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceTableTextBlock" xlink:label="PerformanceTableTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformanceTableTextBlock" use="optional" order="31.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_MarketIndexPerformanceTableTextBlock" xlink:label="MarketIndexPerformanceTableTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="MarketIndexPerformanceTableTextBlock" use="optional" order="34.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_MoneyMarketSevenDayYieldCaption" xlink:label="MoneyMarketSevenDayYieldCaption" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="MoneyMarketSevenDayYieldCaption" order="40.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_MoneyMarketSevenDayYieldColumnName" xlink:label="MoneyMarketSevenDayYieldColumnName" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="MoneyMarketSevenDayYieldColumnName" order="41.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_MoneyMarketSevenDayYieldPhone" xlink:label="MoneyMarketSevenDayYieldPhone" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="MoneyMarketSevenDayYieldPhone" order="42.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_MoneyMarketSevenDayYield" xlink:label="MoneyMarketSevenDayYield" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="MoneyMarketSevenDayYield" order="43.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_MoneyMarketSevenDayTaxEquivalentYield" xlink:label="MoneyMarketSevenDayTaxEquivalentYield" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="MoneyMarketSevenDayTaxEquivalentYield" order="44.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ThirtyDayYieldCaption" xlink:label="ThirtyDayYieldCaption" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ThirtyDayYieldCaption" order="45.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ThirtyDayYieldColumnName" xlink:label="ThirtyDayYieldColumnName" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ThirtyDayYieldColumnName" order="46.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ThirtyDayYieldPhone" xlink:label="ThirtyDayYieldPhone" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ThirtyDayYieldPhone" order="47.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ThirtyDayYield" xlink:label="ThirtyDayYield" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ThirtyDayYield" order="48.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ThirtyDayTaxEquivalentYield" xlink:label="ThirtyDayTaxEquivalentYield" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ThirtyDayTaxEquivalentYield" order="49.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceAvailabilityWebSiteAddress" xlink:label="PerformanceAvailabilityWebSiteAddress" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformanceAvailabilityWebSiteAddress" order="50.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceAvailabilityPhone" xlink:label="PerformanceAvailabilityPhone" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformanceAvailabilityPhone" order="51.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceTableFootnotesTextBlock" xlink:label="PerformanceTableFootnotesTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformanceTableFootnotesTextBlock" use="optional" order="35.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceTableFootnotesReasonPerformanceInformationForClassDifferentFromImmediatelyPrecedingPeriod" xlink:label="PerformanceTableFootnotesReasonPerformanceInformationForClassDifferentFromImmediatelyPrecedingPeriod" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformanceTableFootnotesReasonPerformanceInformationForClassDifferentFromImmediatelyPrecedingPeriod" order="36.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceTableOneClassOfAfterTaxShown" xlink:label="PerformanceTableOneClassOfAfterTaxShown" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformanceTableOneClassOfAfterTaxShown" order="37.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_IndexNoDeductionForFeesExpensesTaxes" xlink:label="IndexNoDeductionForFeesExpensesTaxes" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="IndexNoDeductionForFeesExpensesTaxes" order="38.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AverageAnnualReturnCaption" xlink:label="AverageAnnualReturnCaption" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="AverageAnnualReturnCaption" order="32.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AverageAnnualReturnColumnName" xlink:label="AverageAnnualReturnColumnName" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="AverageAnnualReturnColumnName" order="33.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceTableDoesReflectSalesLoads" xlink:label="PerformanceTableDoesReflectSalesLoads" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformanceTableDoesReflectSalesLoads" order="26.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceTableMarketIndexChanged" xlink:label="PerformanceTableMarketIndexChanged" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformanceTableMarketIndexChanged" order="27.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceTableUsesHighestFederalRate" xlink:label="PerformanceTableUsesHighestFederalRate" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformanceTableUsesHighestFederalRate" order="28.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceTableNotRelevantToTaxDeferred" xlink:label="PerformanceTableNotRelevantToTaxDeferred" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformanceTableNotRelevantToTaxDeferred" order="29.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceTableExplanationAfterTaxHigher" xlink:label="PerformanceTableExplanationAfterTaxHigher" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformanceTableExplanationAfterTaxHigher" order="30.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_YearToDateReturnLabel" xlink:label="YearToDateReturnLabel" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="YearToDateReturnLabel" order="15.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_BarChartYearToDateReturn" xlink:label="BarChartYearToDateReturn" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="BarChartYearToDateReturn" order="16.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_BarChartYearToDateReturnDate" xlink:label="BarChartYearToDateReturnDate" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="BarChartYearToDateReturnDate" order="17.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_HighestQuarterlyReturnLabel" xlink:label="HighestQuarterlyReturnLabel" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="HighestQuarterlyReturnLabel" order="18.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_BarChartHighestQuarterlyReturn" xlink:label="BarChartHighestQuarterlyReturn" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="BarChartHighestQuarterlyReturn" order="19.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_BarChartHighestQuarterlyReturnDate" xlink:label="BarChartHighestQuarterlyReturnDate" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="BarChartHighestQuarterlyReturnDate" order="20.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_LowestQuarterlyReturnLabel" xlink:label="LowestQuarterlyReturnLabel" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="LowestQuarterlyReturnLabel" order="21.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_BarChartLowestQuarterlyReturn" xlink:label="BarChartLowestQuarterlyReturn" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="BarChartLowestQuarterlyReturn" order="22.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_BarChartLowestQuarterlyReturnDate" xlink:label="BarChartLowestQuarterlyReturnDate" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="BarChartLowestQuarterlyReturnDate" order="23.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_BarChartDoesNotReflectSalesLoads" xlink:label="BarChartDoesNotReflectSalesLoads" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="BarChartDoesNotReflectSalesLoads" order="8.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_BarChartReturnsForClassNotOfferedInProspectus" xlink:label="BarChartReturnsForClassNotOfferedInProspectus" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="BarChartReturnsForClassNotOfferedInProspectus" order="9.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_BarChartReasonSelectedClassDifferentFromImmediatelyPrecedingPeriod" xlink:label="BarChartReasonSelectedClassDifferentFromImmediatelyPrecedingPeriod" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="BarChartReasonSelectedClassDifferentFromImmediatelyPrecedingPeriod" order="10.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformancePastDoesNotIndicateFuture" xlink:label="PerformancePastDoesNotIndicateFuture" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformancePastDoesNotIndicateFuture" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceInformationIllustratesVariabilityOfReturns" xlink:label="PerformanceInformationIllustratesVariabilityOfReturns" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformanceInformationIllustratesVariabilityOfReturns" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceOneYearOrLess" xlink:label="PerformanceOneYearOrLess" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformanceOneYearOrLess" order="5.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceAdditionalMarketIndex" xlink:label="PerformanceAdditionalMarketIndex" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformanceAdditionalMarketIndex" order="6.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ClassAxis" xlink:label="ClassAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ClassAxis" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ShareClassDomain" xlink:label="ShareClassDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="ShareClassDomain" order="1.0" priority="1" />
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/9/role/InvestmentRisks" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:link="http://www.xbrl.org/2003/linkbase">
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusTable" xlink:label="ProspectusTable" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="DocumentInformationDocumentAxis" use="optional" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentDomain" xlink:label="DocumentDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="DocumentInformationDocumentAxis" xlink:to="DocumentDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="CoregistrantAxis" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AllCoregistrantsMember" xlink:label="AllCoregistrantsMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="CoregistrantAxis" xlink:to="AllCoregistrantsMember" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="LegalEntityAxis" use="optional" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityDomain" xlink:label="EntityDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="EntityDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusLineItems" xlink:label="ProspectusLineItems" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ProspectusLineItems" order="5.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_RiskTextBlock" xlink:label="RiskTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="RiskTextBlock" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_RiskAxis" xlink:label="RiskAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="RiskAxis" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AllRisksMember" xlink:label="AllRisksMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="RiskAxis" xlink:to="AllRisksMember" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_RiskLoseMoneyMember" xlink:label="RiskLoseMoneyMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="RiskAxis" xlink:to="RiskLoseMoneyMember" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_RiskNotInsuredDepositoryInstitutionMember" xlink:label="RiskNotInsuredDepositoryInstitutionMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="RiskAxis" xlink:to="RiskNotInsuredDepositoryInstitutionMember" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_RiskNotInsuredMember" xlink:label="RiskNotInsuredMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="RiskAxis" xlink:to="RiskNotInsuredMember" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_RiskNondiversifiedStatusMember" xlink:label="RiskNondiversifiedStatusMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="RiskAxis" xlink:to="RiskNondiversifiedStatusMember" order="5.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_RiskMoneyMarketFundPriceFluctuatesMember" xlink:label="RiskMoneyMarketFundPriceFluctuatesMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="RiskAxis" xlink:to="RiskMoneyMarketFundPriceFluctuatesMember" order="6.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_RiskMoneyMarketFundMayImposeFeesOrSuspendSalesMember" xlink:label="RiskMoneyMarketFundMayImposeFeesOrSuspendSalesMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="RiskAxis" xlink:to="RiskMoneyMarketFundMayImposeFeesOrSuspendSalesMember" order="7.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_RiskMoneyMarketFundMayNotPreserveDollarMember" xlink:label="RiskMoneyMarketFundMayNotPreserveDollarMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="RiskAxis" xlink:to="RiskMoneyMarketFundMayNotPreserveDollarMember" order="8.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_RiskMoneyMarketFundSponsorMayNotProvideSupportMember" xlink:label="RiskMoneyMarketFundSponsorMayNotProvideSupportMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="RiskAxis" xlink:to="RiskMoneyMarketFundSponsorMayNotProvideSupportMember" order="9.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_RisksAbstract" xlink:label="RisksAbstract" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="RisksAbstract" xlink:to="ProspectusTable" use="optional" order="1.0" priority="1" />
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/9/role/InvestmentStrategy" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:link="http://www.xbrl.org/2003/linkbase">
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_FormN1aAbstract" xlink:label="FormN1aAbstract" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusTable" xlink:label="ProspectusTable" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="FormN1aAbstract" xlink:to="ProspectusTable" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="DocumentInformationDocumentAxis" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentDomain" xlink:label="DocumentDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="DocumentInformationDocumentAxis" xlink:to="DocumentDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="CoregistrantAxis" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AllCoregistrantsMember" xlink:label="AllCoregistrantsMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="CoregistrantAxis" xlink:to="AllCoregistrantsMember" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="LegalEntityAxis" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityDomain" xlink:label="EntityDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="EntityDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusLineItems" xlink:label="ProspectusLineItems" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ProspectusLineItems" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_StrategyHeading" xlink:label="StrategyHeading" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="StrategyHeading" use="optional" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_StrategyNarrativeTextBlock" xlink:label="StrategyNarrativeTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="StrategyNarrativeTextBlock" use="optional" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_StrategyPortfolioConcentration" xlink:label="StrategyPortfolioConcentration" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="StrategyPortfolioConcentration" order="3.0" priority="1" />
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/9/role/FeesAndExpenses" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:link="http://www.xbrl.org/2003/linkbase">
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_FormN1aAbstract" xlink:label="FormN1aAbstract" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusTable" xlink:label="ProspectusTable" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="FormN1aAbstract" xlink:to="ProspectusTable" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="DocumentInformationDocumentAxis" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentDomain" xlink:label="DocumentDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="DocumentInformationDocumentAxis" xlink:to="DocumentDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="CoregistrantAxis" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AllCoregistrantsMember" xlink:label="AllCoregistrantsMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="CoregistrantAxis" xlink:to="AllCoregistrantsMember" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="LegalEntityAxis" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityDomain" xlink:label="EntityDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="EntityDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusLineItems" xlink:label="ProspectusLineItems" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ProspectusLineItems" order="5.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseHeading" xlink:label="ExpenseHeading" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseHeading" use="optional" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseNarrativeTextBlock" xlink:label="ExpenseNarrativeTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseNarrativeTextBlock" use="optional" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ShareholderFeesCaption" xlink:label="ShareholderFeesCaption" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ShareholderFeesCaption" use="optional" order="11.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_OperatingExpensesCaption" xlink:label="OperatingExpensesCaption" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="OperatingExpensesCaption" use="optional" order="13.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseFootnotesTextBlock" xlink:label="ExpenseFootnotesTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseFootnotesTextBlock" use="optional" order="15.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpensesDeferredChargesTextBlock" xlink:label="ExpensesDeferredChargesTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpensesDeferredChargesTextBlock" use="optional" order="16.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpensesRangeOfExchangeFeesTextBlock" xlink:label="ExpensesRangeOfExchangeFeesTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpensesRangeOfExchangeFeesTextBlock" use="optional" order="17.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleHeading" xlink:label="ExpenseExampleHeading" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleHeading" use="optional" order="18.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleByYearHeading" xlink:label="ExpenseExampleByYearHeading" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleByYearHeading" use="optional" order="19.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleNarrativeTextBlock" xlink:label="ExpenseExampleNarrativeTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleNarrativeTextBlock" use="optional" order="20.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleByYearCaption" xlink:label="ExpenseExampleByYearCaption" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleByYearCaption" use="optional" order="21.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleNoRedemptionNarrativeTextBlock" xlink:label="ExpenseExampleNoRedemptionNarrativeTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleNoRedemptionNarrativeTextBlock" use="optional" order="23.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleNoRedemptionByYearCaption" xlink:label="ExpenseExampleNoRedemptionByYearCaption" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleNoRedemptionByYearCaption" use="optional" order="24.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleFootnotesTextBlock" xlink:label="ExpenseExampleFootnotesTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleFootnotesTextBlock" use="optional" order="26.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleClosingTextBlock" xlink:label="ExpenseExampleClosingTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleClosingTextBlock" use="optional" order="27.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PortfolioTurnoverHeading" xlink:label="PortfolioTurnoverHeading" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PortfolioTurnoverHeading" use="optional" order="28.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PortfolioTurnoverTextBlock" xlink:label="PortfolioTurnoverTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PortfolioTurnoverTextBlock" use="optional" order="29.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ShareholderFeesTableTextBlock" xlink:label="ShareholderFeesTableTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ShareholderFeesTableTextBlock" use="optional" order="12.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AnnualFundOperatingExpensesTableTextBlock" xlink:label="AnnualFundOperatingExpensesTableTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="AnnualFundOperatingExpensesTableTextBlock" use="optional" order="14.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleWithRedemptionTableTextBlock" xlink:label="ExpenseExampleWithRedemptionTableTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleWithRedemptionTableTextBlock" use="optional" order="22.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleNoRedemptionTableTextBlock" xlink:label="ExpenseExampleNoRedemptionTableTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleNoRedemptionTableTextBlock" use="optional" order="25.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PortfolioTurnoverRate" xlink:label="PortfolioTurnoverRate" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PortfolioTurnoverRate" order="30.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseBreakpointDiscounts" xlink:label="ExpenseBreakpointDiscounts" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseBreakpointDiscounts" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpensesOtherExpensesHadExtraordinaryExpensesBeenIncluded" xlink:label="ExpensesOtherExpensesHadExtraordinaryExpensesBeenIncluded" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpensesOtherExpensesHadExtraordinaryExpensesBeenIncluded" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpensesRestatedToReflectCurrent" xlink:label="ExpensesRestatedToReflectCurrent" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpensesRestatedToReflectCurrent" order="5.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseBreakpointMinimumInvestmentRequiredAmount" xlink:label="ExpenseBreakpointMinimumInvestmentRequiredAmount" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseBreakpointMinimumInvestmentRequiredAmount" order="6.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_OtherExpensesNewFundBasedOnEstimates" xlink:label="OtherExpensesNewFundBasedOnEstimates" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="OtherExpensesNewFundBasedOnEstimates" order="7.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AcquiredFundFeesAndExpensesBasedOnEstimates" xlink:label="AcquiredFundFeesAndExpensesBasedOnEstimates" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="AcquiredFundFeesAndExpensesBasedOnEstimates" order="8.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpensesNotCorrelatedToRatioDueToAcquiredFundFees" xlink:label="ExpensesNotCorrelatedToRatioDueToAcquiredFundFees" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpensesNotCorrelatedToRatioDueToAcquiredFundFees" order="9.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpensesExplanationOfNonrecurringAccountFee" xlink:label="ExpensesExplanationOfNonrecurringAccountFee" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpensesExplanationOfNonrecurringAccountFee" order="10.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ClassAxis" xlink:label="ClassAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ClassAxis" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ShareClassDomain" xlink:label="ShareClassDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="ShareClassDomain" order="1.0" priority="1" />
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/9/role/N1aSupplement" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:link="http://www.xbrl.org/2003/linkbase">
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_FormN1aAbstract" xlink:label="FormN1aAbstract" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusTable" xlink:label="ProspectusTable" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="FormN1aAbstract" xlink:to="ProspectusTable" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="DocumentInformationDocumentAxis" use="optional" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentDomain" xlink:label="DocumentDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="DocumentInformationDocumentAxis" xlink:to="DocumentDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="CoregistrantAxis" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AllCoregistrantsMember" xlink:label="AllCoregistrantsMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="CoregistrantAxis" xlink:to="AllCoregistrantsMember" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="LegalEntityAxis" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityDomain" xlink:label="EntityDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="EntityDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusLineItems" xlink:label="ProspectusLineItems" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ProspectusLineItems" order="5.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_SupplementToProspectusTextBlock" xlink:label="SupplementToProspectusTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="SupplementToProspectusTextBlock" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ClassAxis" xlink:label="ClassAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ClassAxis" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ShareClassDomain" xlink:label="ShareClassDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="ShareClassDomain" order="1.0" priority="1" />
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/10/role/RiskReturn" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:link="http://www.xbrl.org/2003/linkbase">
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_FormN1aAbstract" xlink:label="FormN1aAbstract" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusTable" xlink:label="ProspectusTable" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="FormN1aAbstract" xlink:to="ProspectusTable" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="DocumentInformationDocumentAxis" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentDomain" xlink:label="DocumentDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="DocumentInformationDocumentAxis" xlink:to="DocumentDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="CoregistrantAxis" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AllCoregistrantsMember" xlink:label="AllCoregistrantsMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="CoregistrantAxis" xlink:to="AllCoregistrantsMember" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="LegalEntityAxis" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityDomain" xlink:label="EntityDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="EntityDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusLineItems" xlink:label="ProspectusLineItems" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ProspectusLineItems" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_RiskReturnHeading" xlink:label="RiskReturnHeading" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="RiskReturnHeading" use="optional" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ObjectiveHeading" xlink:label="ObjectiveHeading" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ObjectiveHeading" use="optional" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ObjectivePrimaryTextBlock" xlink:label="ObjectivePrimaryTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ObjectivePrimaryTextBlock" use="optional" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ObjectiveSecondaryTextBlock" xlink:label="ObjectiveSecondaryTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ObjectiveSecondaryTextBlock" use="optional" order="4.0" priority="1" />
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/10/role/ShareholderFeesData" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:link="http://www.xbrl.org/2003/linkbase">
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusTable" xlink:label="ProspectusTable" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="DocumentInformationDocumentAxis" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentDomain" xlink:label="DocumentDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="DocumentInformationDocumentAxis" xlink:to="DocumentDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="CoregistrantAxis" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AllCoregistrantsMember" xlink:label="AllCoregistrantsMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="CoregistrantAxis" xlink:to="AllCoregistrantsMember" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="LegalEntityAxis" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityDomain" xlink:label="EntityDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="EntityDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusLineItems" xlink:label="ProspectusLineItems" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ProspectusLineItems" order="5.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ShareholderFeesColumnName" xlink:label="ShareholderFeesColumnName" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ShareholderFeesColumnName" use="optional" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_MaximumCumulativeSalesChargeOverOfferingPrice" xlink:label="MaximumCumulativeSalesChargeOverOfferingPrice" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="MaximumCumulativeSalesChargeOverOfferingPrice" use="optional" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_MaximumCumulativeSalesChargeOverOther" xlink:label="MaximumCumulativeSalesChargeOverOther" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="MaximumCumulativeSalesChargeOverOther" use="optional" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice" xlink:label="MaximumSalesChargeImposedOnPurchasesOverOfferingPrice" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="MaximumSalesChargeImposedOnPurchasesOverOfferingPrice" use="optional" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_MaximumDeferredSalesChargeOverOfferingPrice" xlink:label="MaximumDeferredSalesChargeOverOfferingPrice" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="MaximumDeferredSalesChargeOverOfferingPrice" use="optional" order="5.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_MaximumDeferredSalesChargeOverOther" xlink:label="MaximumDeferredSalesChargeOverOther" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="MaximumDeferredSalesChargeOverOther" use="optional" order="6.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther" xlink:label="MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther" use="optional" order="7.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_RedemptionFeeOverRedemption" xlink:label="RedemptionFeeOverRedemption" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="RedemptionFeeOverRedemption" use="optional" order="8.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_RedemptionFee" xlink:label="RedemptionFee" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="RedemptionFee" use="optional" order="9.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExchangeFeeOverRedemption" xlink:label="ExchangeFeeOverRedemption" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExchangeFeeOverRedemption" use="optional" order="10.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExchangeFee" xlink:label="ExchangeFee" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExchangeFee" use="optional" order="11.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_MaximumAccountFeeOverAssets" xlink:label="MaximumAccountFeeOverAssets" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="MaximumAccountFeeOverAssets" use="optional" order="12.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_MaximumAccountFee" xlink:label="MaximumAccountFee" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="MaximumAccountFee" use="optional" order="13.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ShareholderFeeOther" xlink:label="ShareholderFeeOther" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ShareholderFeeOther" use="optional" order="14.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ClassAxis" xlink:label="ClassAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ClassAxis" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ShareClassDomain" xlink:label="ShareClassDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="ShareClassDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ShareholderFeesAbstract" xlink:label="ShareholderFeesAbstract" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ShareholderFeesAbstract" xlink:to="ProspectusTable" order="1.0" priority="1" />
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/10/role/OperatingExpensesData" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:link="http://www.xbrl.org/2003/linkbase">
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_FormN1aAbstract" xlink:label="FormN1aAbstract" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusTable" xlink:label="ProspectusTable" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="FormN1aAbstract" xlink:to="ProspectusTable" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="DocumentInformationDocumentAxis" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentDomain" xlink:label="DocumentDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="DocumentInformationDocumentAxis" xlink:to="DocumentDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="CoregistrantAxis" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AllCoregistrantsMember" xlink:label="AllCoregistrantsMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="CoregistrantAxis" xlink:to="AllCoregistrantsMember" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="LegalEntityAxis" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityDomain" xlink:label="EntityDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="EntityDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusLineItems" xlink:label="ProspectusLineItems" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ProspectusLineItems" order="5.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_OperatingExpensesColumnName" xlink:label="OperatingExpensesColumnName" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="OperatingExpensesColumnName" use="optional" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ManagementFeesOverAssets" xlink:label="ManagementFeesOverAssets" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ManagementFeesOverAssets" use="optional" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_DistributionAndService12b1FeesOverAssets" xlink:label="DistributionAndService12b1FeesOverAssets" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="DistributionAndService12b1FeesOverAssets" use="optional" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_DistributionOrSimilarNon12b1FeesOverAssets" xlink:label="DistributionOrSimilarNon12b1FeesOverAssets" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="DistributionOrSimilarNon12b1FeesOverAssets" use="optional" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_Component1OtherExpensesOverAssets" xlink:label="Component1OtherExpensesOverAssets" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="Component1OtherExpensesOverAssets" use="optional" order="5.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_Component2OtherExpensesOverAssets" xlink:label="Component2OtherExpensesOverAssets" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="Component2OtherExpensesOverAssets" use="optional" order="6.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_Component3OtherExpensesOverAssets" xlink:label="Component3OtherExpensesOverAssets" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="Component3OtherExpensesOverAssets" use="optional" order="7.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_OtherExpensesOverAssets" xlink:label="OtherExpensesOverAssets" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="OtherExpensesOverAssets" use="optional" order="8.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AcquiredFundFeesAndExpensesOverAssets" xlink:label="AcquiredFundFeesAndExpensesOverAssets" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="AcquiredFundFeesAndExpensesOverAssets" use="optional" order="9.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpensesOverAssets" xlink:label="ExpensesOverAssets" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpensesOverAssets" use="optional" order="10.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_FeeWaiverOrReimbursementOverAssets" xlink:label="FeeWaiverOrReimbursementOverAssets" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="FeeWaiverOrReimbursementOverAssets" use="optional" order="11.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_NetExpensesOverAssets" xlink:label="NetExpensesOverAssets" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="NetExpensesOverAssets" use="optional" order="12.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_FeeWaiverOrReimbursementOverAssetsDateOfTermination" xlink:label="FeeWaiverOrReimbursementOverAssetsDateOfTermination" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="FeeWaiverOrReimbursementOverAssetsDateOfTermination" order="13.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ClassAxis" xlink:label="ClassAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ClassAxis" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ShareClassDomain" xlink:label="ShareClassDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="ShareClassDomain" order="1.0" priority="1" />
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/10/role/ExpenseExample" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:link="http://www.xbrl.org/2003/linkbase">
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusTable" xlink:label="ProspectusTable" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="DocumentInformationDocumentAxis" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentDomain" xlink:label="DocumentDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="DocumentInformationDocumentAxis" xlink:to="DocumentDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="CoregistrantAxis" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AllCoregistrantsMember" xlink:label="AllCoregistrantsMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="CoregistrantAxis" xlink:to="AllCoregistrantsMember" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="LegalEntityAxis" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityDomain" xlink:label="EntityDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="EntityDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusLineItems" xlink:label="ProspectusLineItems" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ProspectusLineItems" order="5.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleByYearColumnName" xlink:label="ExpenseExampleByYearColumnName" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleByYearColumnName" use="optional" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleYear01" xlink:label="ExpenseExampleYear01" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleYear01" use="optional" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleYear03" xlink:label="ExpenseExampleYear03" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleYear03" use="optional" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleYear05" xlink:label="ExpenseExampleYear05" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleYear05" use="optional" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleYear10" xlink:label="ExpenseExampleYear10" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleYear10" use="optional" order="5.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ClassAxis" xlink:label="ClassAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ClassAxis" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ShareClassDomain" xlink:label="ShareClassDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="ShareClassDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleAbstract" xlink:label="ExpenseExampleAbstract" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ExpenseExampleAbstract" xlink:to="ProspectusTable" order="1.0" priority="1" />
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/10/role/ExpenseExampleNoRedemption" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:link="http://www.xbrl.org/2003/linkbase">
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusTable" xlink:label="ProspectusTable" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="DocumentInformationDocumentAxis" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentDomain" xlink:label="DocumentDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="DocumentInformationDocumentAxis" xlink:to="DocumentDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="CoregistrantAxis" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AllCoregistrantsMember" xlink:label="AllCoregistrantsMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="CoregistrantAxis" xlink:to="AllCoregistrantsMember" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="LegalEntityAxis" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityDomain" xlink:label="EntityDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="EntityDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusLineItems" xlink:label="ProspectusLineItems" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ProspectusLineItems" order="5.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleNoRedemptionByYearColumnName" xlink:label="ExpenseExampleNoRedemptionByYearColumnName" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleNoRedemptionByYearColumnName" use="optional" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleNoRedemptionYear01" xlink:label="ExpenseExampleNoRedemptionYear01" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleNoRedemptionYear01" use="optional" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleNoRedemptionYear03" xlink:label="ExpenseExampleNoRedemptionYear03" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleNoRedemptionYear03" use="optional" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleNoRedemptionYear05" xlink:label="ExpenseExampleNoRedemptionYear05" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleNoRedemptionYear05" use="optional" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleNoRedemptionYear10" xlink:label="ExpenseExampleNoRedemptionYear10" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleNoRedemptionYear10" use="optional" order="5.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ClassAxis" xlink:label="ClassAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ClassAxis" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ShareClassDomain" xlink:label="ShareClassDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="ShareClassDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleNoRedemptionAbstract" xlink:label="ExpenseExampleNoRedemptionAbstract" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ExpenseExampleNoRedemptionAbstract" xlink:to="ProspectusTable" order="1.0" priority="1" />
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/10/role/BarChartData" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:link="http://www.xbrl.org/2003/linkbase">
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusTable" xlink:label="ProspectusTable" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="DocumentInformationDocumentAxis" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentDomain" xlink:label="DocumentDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="DocumentInformationDocumentAxis" xlink:to="DocumentDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="CoregistrantAxis" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AllCoregistrantsMember" xlink:label="AllCoregistrantsMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="CoregistrantAxis" xlink:to="AllCoregistrantsMember" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="LegalEntityAxis" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityDomain" xlink:label="EntityDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="EntityDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusLineItems" xlink:label="ProspectusLineItems" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ProspectusLineItems" order="5.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AnnualReturnCaption" xlink:label="AnnualReturnCaption" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="AnnualReturnCaption" use="optional" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AnnualReturnColumnName" xlink:label="AnnualReturnColumnName" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="AnnualReturnColumnName" use="optional" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AnnualReturnInceptionDate" xlink:label="AnnualReturnInceptionDate" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="AnnualReturnInceptionDate" use="optional" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AnnlRtrPct" xlink:label="AnnlRtrPct" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="AnnlRtrPct" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ClassAxis" xlink:label="ClassAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ClassAxis" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ShareClassDomain" xlink:label="ShareClassDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="ShareClassDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_BarChartTableAbstract" xlink:label="BarChartTableAbstract" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="BarChartTableAbstract" xlink:to="ProspectusTable" order="1.0" priority="1" />
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/10/role/PerformanceTableData" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:link="http://www.xbrl.org/2003/linkbase">
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusTable" xlink:label="ProspectusTable" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="DocumentInformationDocumentAxis" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentDomain" xlink:label="DocumentDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="DocumentInformationDocumentAxis" xlink:to="DocumentDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="CoregistrantAxis" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AllCoregistrantsMember" xlink:label="AllCoregistrantsMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="CoregistrantAxis" xlink:to="AllCoregistrantsMember" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusLineItems" xlink:label="ProspectusLineItems" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ProspectusLineItems" order="5.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AverageAnnualReturnLabel" xlink:label="AverageAnnualReturnLabel" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="AverageAnnualReturnLabel" use="optional" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AvgAnnlRtrPct" xlink:label="AvgAnnlRtrPct" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="AvgAnnlRtrPct" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerfInceptionDate" xlink:label="PerfInceptionDate" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerfInceptionDate" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ClassAxis" xlink:label="ClassAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ClassAxis" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ShareClassDomain" xlink:label="ShareClassDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="ShareClassDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceMeasureAxis" xlink:label="PerformanceMeasureAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="PerformanceMeasureAxis" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceMeasureDomain" xlink:label="PerformanceMeasureDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="PerformanceMeasureAxis" xlink:to="PerformanceMeasureDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AfterTaxesOnDistributionsMember" xlink:label="AfterTaxesOnDistributionsMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="PerformanceMeasureDomain" xlink:to="AfterTaxesOnDistributionsMember" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AfterTaxesOnDistributionsAndSalesMember" xlink:label="AfterTaxesOnDistributionsAndSalesMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="PerformanceMeasureDomain" xlink:to="AfterTaxesOnDistributionsAndSalesMember" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AverageAnnualReturnAbstract" xlink:label="AverageAnnualReturnAbstract" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="AverageAnnualReturnAbstract" xlink:to="ProspectusTable" order="1.0" priority="1" />
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/10/role/N1aCover" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:link="http://www.xbrl.org/2003/linkbase">
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_FormN1aAbstract" xlink:label="FormN1aAbstract" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusTable" xlink:label="ProspectusTable" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="FormN1aAbstract" xlink:to="ProspectusTable" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="DocumentInformationDocumentAxis" use="optional" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentDomain" xlink:label="DocumentDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="DocumentInformationDocumentAxis" xlink:to="DocumentDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="CoregistrantAxis" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AllCoregistrantsMember" xlink:label="AllCoregistrantsMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="CoregistrantAxis" xlink:to="AllCoregistrantsMember" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusLineItems" xlink:label="ProspectusLineItems" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ProspectusLineItems" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentType" xlink:label="DocumentType" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="DocumentType" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_AmendmentFlag" xlink:label="AmendmentFlag" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="AmendmentFlag" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_AmendmentDescription" xlink:label="AmendmentDescription" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="AmendmentDescription" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityRegistrantName" xlink:label="EntityRegistrantName" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="EntityRegistrantName" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityCentralIndexKey" xlink:label="EntityCentralIndexKey" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="EntityCentralIndexKey" order="5.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityInvCompanyType" xlink:label="EntityInvCompanyType" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="EntityInvCompanyType" order="6.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentPeriodEndDate" xlink:label="DocumentPeriodEndDate" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="DocumentPeriodEndDate" order="7.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusDate" xlink:label="ProspectusDate" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ProspectusDate" order="8.0" priority="1" />
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/10/role/PerformanceManagement" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:link="http://www.xbrl.org/2003/linkbase">
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_FormN1aAbstract" xlink:label="FormN1aAbstract" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusTable" xlink:label="ProspectusTable" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="FormN1aAbstract" xlink:to="ProspectusTable" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="DocumentInformationDocumentAxis" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentDomain" xlink:label="DocumentDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="DocumentInformationDocumentAxis" xlink:to="DocumentDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="CoregistrantAxis" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AllCoregistrantsMember" xlink:label="AllCoregistrantsMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="CoregistrantAxis" xlink:to="AllCoregistrantsMember" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="LegalEntityAxis" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityDomain" xlink:label="EntityDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="EntityDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusLineItems" xlink:label="ProspectusLineItems" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ProspectusLineItems" order="5.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_BarChartAndPerformanceTableHeading" xlink:label="BarChartAndPerformanceTableHeading" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="BarChartAndPerformanceTableHeading" use="optional" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceNarrativeTextBlock" xlink:label="PerformanceNarrativeTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformanceNarrativeTextBlock" use="optional" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_BarChartNarrativeTextBlock" xlink:label="BarChartNarrativeTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="BarChartNarrativeTextBlock" use="optional" order="7.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_BarChartHeading" xlink:label="BarChartHeading" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="BarChartHeading" use="optional" order="11.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_BarChartFootnotesTextBlock" xlink:label="BarChartFootnotesTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="BarChartFootnotesTextBlock" use="optional" order="13.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_BarChartClosingTextBlock" xlink:label="BarChartClosingTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="BarChartClosingTextBlock" use="optional" order="14.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceTableHeading" xlink:label="PerformanceTableHeading" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformanceTableHeading" use="optional" order="24.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceTableNarrativeTextBlock" xlink:label="PerformanceTableNarrativeTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformanceTableNarrativeTextBlock" use="optional" order="25.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceTableClosingTextBlock" xlink:label="PerformanceTableClosingTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformanceTableClosingTextBlock" use="optional" order="39.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_BarChartTableTextBlock" xlink:label="BarChartTableTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="BarChartTableTextBlock" use="optional" order="12.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceTableTextBlock" xlink:label="PerformanceTableTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformanceTableTextBlock" use="optional" order="31.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_MarketIndexPerformanceTableTextBlock" xlink:label="MarketIndexPerformanceTableTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="MarketIndexPerformanceTableTextBlock" use="optional" order="34.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_MoneyMarketSevenDayYieldCaption" xlink:label="MoneyMarketSevenDayYieldCaption" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="MoneyMarketSevenDayYieldCaption" order="40.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_MoneyMarketSevenDayYieldColumnName" xlink:label="MoneyMarketSevenDayYieldColumnName" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="MoneyMarketSevenDayYieldColumnName" order="41.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_MoneyMarketSevenDayYieldPhone" xlink:label="MoneyMarketSevenDayYieldPhone" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="MoneyMarketSevenDayYieldPhone" order="42.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_MoneyMarketSevenDayYield" xlink:label="MoneyMarketSevenDayYield" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="MoneyMarketSevenDayYield" order="43.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_MoneyMarketSevenDayTaxEquivalentYield" xlink:label="MoneyMarketSevenDayTaxEquivalentYield" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="MoneyMarketSevenDayTaxEquivalentYield" order="44.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ThirtyDayYieldCaption" xlink:label="ThirtyDayYieldCaption" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ThirtyDayYieldCaption" order="45.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ThirtyDayYieldColumnName" xlink:label="ThirtyDayYieldColumnName" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ThirtyDayYieldColumnName" order="46.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ThirtyDayYieldPhone" xlink:label="ThirtyDayYieldPhone" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ThirtyDayYieldPhone" order="47.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ThirtyDayYield" xlink:label="ThirtyDayYield" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ThirtyDayYield" order="48.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ThirtyDayTaxEquivalentYield" xlink:label="ThirtyDayTaxEquivalentYield" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ThirtyDayTaxEquivalentYield" order="49.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceAvailabilityWebSiteAddress" xlink:label="PerformanceAvailabilityWebSiteAddress" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformanceAvailabilityWebSiteAddress" order="50.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceAvailabilityPhone" xlink:label="PerformanceAvailabilityPhone" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformanceAvailabilityPhone" order="51.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceTableFootnotesTextBlock" xlink:label="PerformanceTableFootnotesTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformanceTableFootnotesTextBlock" use="optional" order="35.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceTableFootnotesReasonPerformanceInformationForClassDifferentFromImmediatelyPrecedingPeriod" xlink:label="PerformanceTableFootnotesReasonPerformanceInformationForClassDifferentFromImmediatelyPrecedingPeriod" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformanceTableFootnotesReasonPerformanceInformationForClassDifferentFromImmediatelyPrecedingPeriod" order="36.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceTableOneClassOfAfterTaxShown" xlink:label="PerformanceTableOneClassOfAfterTaxShown" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformanceTableOneClassOfAfterTaxShown" order="37.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_IndexNoDeductionForFeesExpensesTaxes" xlink:label="IndexNoDeductionForFeesExpensesTaxes" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="IndexNoDeductionForFeesExpensesTaxes" order="38.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AverageAnnualReturnCaption" xlink:label="AverageAnnualReturnCaption" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="AverageAnnualReturnCaption" order="32.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AverageAnnualReturnColumnName" xlink:label="AverageAnnualReturnColumnName" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="AverageAnnualReturnColumnName" order="33.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceTableDoesReflectSalesLoads" xlink:label="PerformanceTableDoesReflectSalesLoads" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformanceTableDoesReflectSalesLoads" order="26.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceTableMarketIndexChanged" xlink:label="PerformanceTableMarketIndexChanged" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformanceTableMarketIndexChanged" order="27.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceTableUsesHighestFederalRate" xlink:label="PerformanceTableUsesHighestFederalRate" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformanceTableUsesHighestFederalRate" order="28.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceTableNotRelevantToTaxDeferred" xlink:label="PerformanceTableNotRelevantToTaxDeferred" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformanceTableNotRelevantToTaxDeferred" order="29.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceTableExplanationAfterTaxHigher" xlink:label="PerformanceTableExplanationAfterTaxHigher" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformanceTableExplanationAfterTaxHigher" order="30.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_YearToDateReturnLabel" xlink:label="YearToDateReturnLabel" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="YearToDateReturnLabel" order="15.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_BarChartYearToDateReturn" xlink:label="BarChartYearToDateReturn" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="BarChartYearToDateReturn" order="16.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_BarChartYearToDateReturnDate" xlink:label="BarChartYearToDateReturnDate" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="BarChartYearToDateReturnDate" order="17.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_HighestQuarterlyReturnLabel" xlink:label="HighestQuarterlyReturnLabel" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="HighestQuarterlyReturnLabel" order="18.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_BarChartHighestQuarterlyReturn" xlink:label="BarChartHighestQuarterlyReturn" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="BarChartHighestQuarterlyReturn" order="19.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_BarChartHighestQuarterlyReturnDate" xlink:label="BarChartHighestQuarterlyReturnDate" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="BarChartHighestQuarterlyReturnDate" order="20.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_LowestQuarterlyReturnLabel" xlink:label="LowestQuarterlyReturnLabel" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="LowestQuarterlyReturnLabel" order="21.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_BarChartLowestQuarterlyReturn" xlink:label="BarChartLowestQuarterlyReturn" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="BarChartLowestQuarterlyReturn" order="22.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_BarChartLowestQuarterlyReturnDate" xlink:label="BarChartLowestQuarterlyReturnDate" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="BarChartLowestQuarterlyReturnDate" order="23.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_BarChartDoesNotReflectSalesLoads" xlink:label="BarChartDoesNotReflectSalesLoads" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="BarChartDoesNotReflectSalesLoads" order="8.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_BarChartReturnsForClassNotOfferedInProspectus" xlink:label="BarChartReturnsForClassNotOfferedInProspectus" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="BarChartReturnsForClassNotOfferedInProspectus" order="9.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_BarChartReasonSelectedClassDifferentFromImmediatelyPrecedingPeriod" xlink:label="BarChartReasonSelectedClassDifferentFromImmediatelyPrecedingPeriod" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="BarChartReasonSelectedClassDifferentFromImmediatelyPrecedingPeriod" order="10.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformancePastDoesNotIndicateFuture" xlink:label="PerformancePastDoesNotIndicateFuture" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformancePastDoesNotIndicateFuture" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceInformationIllustratesVariabilityOfReturns" xlink:label="PerformanceInformationIllustratesVariabilityOfReturns" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformanceInformationIllustratesVariabilityOfReturns" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceOneYearOrLess" xlink:label="PerformanceOneYearOrLess" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformanceOneYearOrLess" order="5.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceAdditionalMarketIndex" xlink:label="PerformanceAdditionalMarketIndex" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformanceAdditionalMarketIndex" order="6.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ClassAxis" xlink:label="ClassAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ClassAxis" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ShareClassDomain" xlink:label="ShareClassDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="ShareClassDomain" order="1.0" priority="1" />
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/10/role/InvestmentRisks" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:link="http://www.xbrl.org/2003/linkbase">
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusTable" xlink:label="ProspectusTable" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="DocumentInformationDocumentAxis" use="optional" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentDomain" xlink:label="DocumentDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="DocumentInformationDocumentAxis" xlink:to="DocumentDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="CoregistrantAxis" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AllCoregistrantsMember" xlink:label="AllCoregistrantsMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="CoregistrantAxis" xlink:to="AllCoregistrantsMember" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="LegalEntityAxis" use="optional" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityDomain" xlink:label="EntityDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="EntityDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusLineItems" xlink:label="ProspectusLineItems" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ProspectusLineItems" order="5.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_RiskTextBlock" xlink:label="RiskTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="RiskTextBlock" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_RiskAxis" xlink:label="RiskAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="RiskAxis" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AllRisksMember" xlink:label="AllRisksMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="RiskAxis" xlink:to="AllRisksMember" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_RiskLoseMoneyMember" xlink:label="RiskLoseMoneyMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="RiskAxis" xlink:to="RiskLoseMoneyMember" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_RiskNotInsuredDepositoryInstitutionMember" xlink:label="RiskNotInsuredDepositoryInstitutionMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="RiskAxis" xlink:to="RiskNotInsuredDepositoryInstitutionMember" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_RiskNotInsuredMember" xlink:label="RiskNotInsuredMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="RiskAxis" xlink:to="RiskNotInsuredMember" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_RiskNondiversifiedStatusMember" xlink:label="RiskNondiversifiedStatusMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="RiskAxis" xlink:to="RiskNondiversifiedStatusMember" order="5.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_RiskMoneyMarketFundPriceFluctuatesMember" xlink:label="RiskMoneyMarketFundPriceFluctuatesMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="RiskAxis" xlink:to="RiskMoneyMarketFundPriceFluctuatesMember" order="6.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_RiskMoneyMarketFundMayImposeFeesOrSuspendSalesMember" xlink:label="RiskMoneyMarketFundMayImposeFeesOrSuspendSalesMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="RiskAxis" xlink:to="RiskMoneyMarketFundMayImposeFeesOrSuspendSalesMember" order="7.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_RiskMoneyMarketFundMayNotPreserveDollarMember" xlink:label="RiskMoneyMarketFundMayNotPreserveDollarMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="RiskAxis" xlink:to="RiskMoneyMarketFundMayNotPreserveDollarMember" order="8.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_RiskMoneyMarketFundSponsorMayNotProvideSupportMember" xlink:label="RiskMoneyMarketFundSponsorMayNotProvideSupportMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="RiskAxis" xlink:to="RiskMoneyMarketFundSponsorMayNotProvideSupportMember" order="9.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_RisksAbstract" xlink:label="RisksAbstract" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="RisksAbstract" xlink:to="ProspectusTable" use="optional" order="1.0" priority="1" />
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/10/role/InvestmentStrategy" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:link="http://www.xbrl.org/2003/linkbase">
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_FormN1aAbstract" xlink:label="FormN1aAbstract" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusTable" xlink:label="ProspectusTable" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="FormN1aAbstract" xlink:to="ProspectusTable" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="DocumentInformationDocumentAxis" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentDomain" xlink:label="DocumentDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="DocumentInformationDocumentAxis" xlink:to="DocumentDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="CoregistrantAxis" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AllCoregistrantsMember" xlink:label="AllCoregistrantsMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="CoregistrantAxis" xlink:to="AllCoregistrantsMember" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="LegalEntityAxis" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityDomain" xlink:label="EntityDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="EntityDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusLineItems" xlink:label="ProspectusLineItems" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ProspectusLineItems" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_StrategyHeading" xlink:label="StrategyHeading" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="StrategyHeading" use="optional" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_StrategyNarrativeTextBlock" xlink:label="StrategyNarrativeTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="StrategyNarrativeTextBlock" use="optional" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_StrategyPortfolioConcentration" xlink:label="StrategyPortfolioConcentration" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="StrategyPortfolioConcentration" order="3.0" priority="1" />
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/10/role/FeesAndExpenses" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:link="http://www.xbrl.org/2003/linkbase">
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_FormN1aAbstract" xlink:label="FormN1aAbstract" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusTable" xlink:label="ProspectusTable" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="FormN1aAbstract" xlink:to="ProspectusTable" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="DocumentInformationDocumentAxis" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentDomain" xlink:label="DocumentDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="DocumentInformationDocumentAxis" xlink:to="DocumentDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="CoregistrantAxis" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AllCoregistrantsMember" xlink:label="AllCoregistrantsMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="CoregistrantAxis" xlink:to="AllCoregistrantsMember" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="LegalEntityAxis" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityDomain" xlink:label="EntityDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="EntityDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusLineItems" xlink:label="ProspectusLineItems" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ProspectusLineItems" order="5.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseHeading" xlink:label="ExpenseHeading" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseHeading" use="optional" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseNarrativeTextBlock" xlink:label="ExpenseNarrativeTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseNarrativeTextBlock" use="optional" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ShareholderFeesCaption" xlink:label="ShareholderFeesCaption" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ShareholderFeesCaption" use="optional" order="11.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_OperatingExpensesCaption" xlink:label="OperatingExpensesCaption" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="OperatingExpensesCaption" use="optional" order="13.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseFootnotesTextBlock" xlink:label="ExpenseFootnotesTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseFootnotesTextBlock" use="optional" order="15.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpensesDeferredChargesTextBlock" xlink:label="ExpensesDeferredChargesTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpensesDeferredChargesTextBlock" use="optional" order="16.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpensesRangeOfExchangeFeesTextBlock" xlink:label="ExpensesRangeOfExchangeFeesTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpensesRangeOfExchangeFeesTextBlock" use="optional" order="17.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleHeading" xlink:label="ExpenseExampleHeading" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleHeading" use="optional" order="18.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleByYearHeading" xlink:label="ExpenseExampleByYearHeading" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleByYearHeading" use="optional" order="19.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleNarrativeTextBlock" xlink:label="ExpenseExampleNarrativeTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleNarrativeTextBlock" use="optional" order="20.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleByYearCaption" xlink:label="ExpenseExampleByYearCaption" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleByYearCaption" use="optional" order="21.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleNoRedemptionNarrativeTextBlock" xlink:label="ExpenseExampleNoRedemptionNarrativeTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleNoRedemptionNarrativeTextBlock" use="optional" order="23.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleNoRedemptionByYearCaption" xlink:label="ExpenseExampleNoRedemptionByYearCaption" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleNoRedemptionByYearCaption" use="optional" order="24.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleFootnotesTextBlock" xlink:label="ExpenseExampleFootnotesTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleFootnotesTextBlock" use="optional" order="26.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleClosingTextBlock" xlink:label="ExpenseExampleClosingTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleClosingTextBlock" use="optional" order="27.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PortfolioTurnoverHeading" xlink:label="PortfolioTurnoverHeading" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PortfolioTurnoverHeading" use="optional" order="28.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PortfolioTurnoverTextBlock" xlink:label="PortfolioTurnoverTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PortfolioTurnoverTextBlock" use="optional" order="29.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ShareholderFeesTableTextBlock" xlink:label="ShareholderFeesTableTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ShareholderFeesTableTextBlock" use="optional" order="12.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AnnualFundOperatingExpensesTableTextBlock" xlink:label="AnnualFundOperatingExpensesTableTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="AnnualFundOperatingExpensesTableTextBlock" use="optional" order="14.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleWithRedemptionTableTextBlock" xlink:label="ExpenseExampleWithRedemptionTableTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleWithRedemptionTableTextBlock" use="optional" order="22.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleNoRedemptionTableTextBlock" xlink:label="ExpenseExampleNoRedemptionTableTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleNoRedemptionTableTextBlock" use="optional" order="25.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PortfolioTurnoverRate" xlink:label="PortfolioTurnoverRate" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PortfolioTurnoverRate" order="30.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseBreakpointDiscounts" xlink:label="ExpenseBreakpointDiscounts" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseBreakpointDiscounts" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpensesOtherExpensesHadExtraordinaryExpensesBeenIncluded" xlink:label="ExpensesOtherExpensesHadExtraordinaryExpensesBeenIncluded" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpensesOtherExpensesHadExtraordinaryExpensesBeenIncluded" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpensesRestatedToReflectCurrent" xlink:label="ExpensesRestatedToReflectCurrent" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpensesRestatedToReflectCurrent" order="5.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseBreakpointMinimumInvestmentRequiredAmount" xlink:label="ExpenseBreakpointMinimumInvestmentRequiredAmount" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseBreakpointMinimumInvestmentRequiredAmount" order="6.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_OtherExpensesNewFundBasedOnEstimates" xlink:label="OtherExpensesNewFundBasedOnEstimates" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="OtherExpensesNewFundBasedOnEstimates" order="7.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AcquiredFundFeesAndExpensesBasedOnEstimates" xlink:label="AcquiredFundFeesAndExpensesBasedOnEstimates" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="AcquiredFundFeesAndExpensesBasedOnEstimates" order="8.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpensesNotCorrelatedToRatioDueToAcquiredFundFees" xlink:label="ExpensesNotCorrelatedToRatioDueToAcquiredFundFees" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpensesNotCorrelatedToRatioDueToAcquiredFundFees" order="9.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpensesExplanationOfNonrecurringAccountFee" xlink:label="ExpensesExplanationOfNonrecurringAccountFee" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpensesExplanationOfNonrecurringAccountFee" order="10.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ClassAxis" xlink:label="ClassAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ClassAxis" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ShareClassDomain" xlink:label="ShareClassDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="ShareClassDomain" order="1.0" priority="1" />
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/10/role/N1aSupplement" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:link="http://www.xbrl.org/2003/linkbase">
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_FormN1aAbstract" xlink:label="FormN1aAbstract" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusTable" xlink:label="ProspectusTable" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="FormN1aAbstract" xlink:to="ProspectusTable" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="DocumentInformationDocumentAxis" use="optional" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentDomain" xlink:label="DocumentDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="DocumentInformationDocumentAxis" xlink:to="DocumentDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="CoregistrantAxis" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AllCoregistrantsMember" xlink:label="AllCoregistrantsMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="CoregistrantAxis" xlink:to="AllCoregistrantsMember" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="LegalEntityAxis" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityDomain" xlink:label="EntityDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="EntityDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusLineItems" xlink:label="ProspectusLineItems" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ProspectusLineItems" order="5.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_SupplementToProspectusTextBlock" xlink:label="SupplementToProspectusTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="SupplementToProspectusTextBlock" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ClassAxis" xlink:label="ClassAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ClassAxis" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ShareClassDomain" xlink:label="ShareClassDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="ShareClassDomain" order="1.0" priority="1" />
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/11/role/RiskReturn" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:link="http://www.xbrl.org/2003/linkbase">
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_FormN1aAbstract" xlink:label="FormN1aAbstract" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusTable" xlink:label="ProspectusTable" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="FormN1aAbstract" xlink:to="ProspectusTable" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="DocumentInformationDocumentAxis" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentDomain" xlink:label="DocumentDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="DocumentInformationDocumentAxis" xlink:to="DocumentDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="CoregistrantAxis" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AllCoregistrantsMember" xlink:label="AllCoregistrantsMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="CoregistrantAxis" xlink:to="AllCoregistrantsMember" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="LegalEntityAxis" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityDomain" xlink:label="EntityDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="EntityDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusLineItems" xlink:label="ProspectusLineItems" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ProspectusLineItems" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_RiskReturnHeading" xlink:label="RiskReturnHeading" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="RiskReturnHeading" use="optional" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ObjectiveHeading" xlink:label="ObjectiveHeading" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ObjectiveHeading" use="optional" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ObjectivePrimaryTextBlock" xlink:label="ObjectivePrimaryTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ObjectivePrimaryTextBlock" use="optional" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ObjectiveSecondaryTextBlock" xlink:label="ObjectiveSecondaryTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ObjectiveSecondaryTextBlock" use="optional" order="4.0" priority="1" />
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/11/role/ShareholderFeesData" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:link="http://www.xbrl.org/2003/linkbase">
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusTable" xlink:label="ProspectusTable" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="DocumentInformationDocumentAxis" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentDomain" xlink:label="DocumentDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="DocumentInformationDocumentAxis" xlink:to="DocumentDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="CoregistrantAxis" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AllCoregistrantsMember" xlink:label="AllCoregistrantsMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="CoregistrantAxis" xlink:to="AllCoregistrantsMember" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="LegalEntityAxis" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityDomain" xlink:label="EntityDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="EntityDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusLineItems" xlink:label="ProspectusLineItems" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ProspectusLineItems" order="5.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ShareholderFeesColumnName" xlink:label="ShareholderFeesColumnName" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ShareholderFeesColumnName" use="optional" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_MaximumCumulativeSalesChargeOverOfferingPrice" xlink:label="MaximumCumulativeSalesChargeOverOfferingPrice" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="MaximumCumulativeSalesChargeOverOfferingPrice" use="optional" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_MaximumCumulativeSalesChargeOverOther" xlink:label="MaximumCumulativeSalesChargeOverOther" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="MaximumCumulativeSalesChargeOverOther" use="optional" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice" xlink:label="MaximumSalesChargeImposedOnPurchasesOverOfferingPrice" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="MaximumSalesChargeImposedOnPurchasesOverOfferingPrice" use="optional" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_MaximumDeferredSalesChargeOverOfferingPrice" xlink:label="MaximumDeferredSalesChargeOverOfferingPrice" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="MaximumDeferredSalesChargeOverOfferingPrice" use="optional" order="5.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_MaximumDeferredSalesChargeOverOther" xlink:label="MaximumDeferredSalesChargeOverOther" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="MaximumDeferredSalesChargeOverOther" use="optional" order="6.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther" xlink:label="MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther" use="optional" order="7.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_RedemptionFeeOverRedemption" xlink:label="RedemptionFeeOverRedemption" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="RedemptionFeeOverRedemption" use="optional" order="8.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_RedemptionFee" xlink:label="RedemptionFee" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="RedemptionFee" use="optional" order="9.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExchangeFeeOverRedemption" xlink:label="ExchangeFeeOverRedemption" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExchangeFeeOverRedemption" use="optional" order="10.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExchangeFee" xlink:label="ExchangeFee" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExchangeFee" use="optional" order="11.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_MaximumAccountFeeOverAssets" xlink:label="MaximumAccountFeeOverAssets" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="MaximumAccountFeeOverAssets" use="optional" order="12.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_MaximumAccountFee" xlink:label="MaximumAccountFee" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="MaximumAccountFee" use="optional" order="13.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ShareholderFeeOther" xlink:label="ShareholderFeeOther" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ShareholderFeeOther" use="optional" order="14.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ClassAxis" xlink:label="ClassAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ClassAxis" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ShareClassDomain" xlink:label="ShareClassDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="ShareClassDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ShareholderFeesAbstract" xlink:label="ShareholderFeesAbstract" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ShareholderFeesAbstract" xlink:to="ProspectusTable" order="1.0" priority="1" />
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/11/role/OperatingExpensesData" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:link="http://www.xbrl.org/2003/linkbase">
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_FormN1aAbstract" xlink:label="FormN1aAbstract" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusTable" xlink:label="ProspectusTable" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="FormN1aAbstract" xlink:to="ProspectusTable" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="DocumentInformationDocumentAxis" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentDomain" xlink:label="DocumentDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="DocumentInformationDocumentAxis" xlink:to="DocumentDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="CoregistrantAxis" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AllCoregistrantsMember" xlink:label="AllCoregistrantsMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="CoregistrantAxis" xlink:to="AllCoregistrantsMember" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="LegalEntityAxis" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityDomain" xlink:label="EntityDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="EntityDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusLineItems" xlink:label="ProspectusLineItems" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ProspectusLineItems" order="5.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_OperatingExpensesColumnName" xlink:label="OperatingExpensesColumnName" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="OperatingExpensesColumnName" use="optional" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ManagementFeesOverAssets" xlink:label="ManagementFeesOverAssets" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ManagementFeesOverAssets" use="optional" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_DistributionAndService12b1FeesOverAssets" xlink:label="DistributionAndService12b1FeesOverAssets" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="DistributionAndService12b1FeesOverAssets" use="optional" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_DistributionOrSimilarNon12b1FeesOverAssets" xlink:label="DistributionOrSimilarNon12b1FeesOverAssets" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="DistributionOrSimilarNon12b1FeesOverAssets" use="optional" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_Component1OtherExpensesOverAssets" xlink:label="Component1OtherExpensesOverAssets" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="Component1OtherExpensesOverAssets" use="optional" order="5.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_Component2OtherExpensesOverAssets" xlink:label="Component2OtherExpensesOverAssets" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="Component2OtherExpensesOverAssets" use="optional" order="6.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_Component3OtherExpensesOverAssets" xlink:label="Component3OtherExpensesOverAssets" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="Component3OtherExpensesOverAssets" use="optional" order="7.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_OtherExpensesOverAssets" xlink:label="OtherExpensesOverAssets" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="OtherExpensesOverAssets" use="optional" order="8.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AcquiredFundFeesAndExpensesOverAssets" xlink:label="AcquiredFundFeesAndExpensesOverAssets" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="AcquiredFundFeesAndExpensesOverAssets" use="optional" order="9.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpensesOverAssets" xlink:label="ExpensesOverAssets" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpensesOverAssets" use="optional" order="10.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_FeeWaiverOrReimbursementOverAssets" xlink:label="FeeWaiverOrReimbursementOverAssets" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="FeeWaiverOrReimbursementOverAssets" use="optional" order="11.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_NetExpensesOverAssets" xlink:label="NetExpensesOverAssets" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="NetExpensesOverAssets" use="optional" order="12.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_FeeWaiverOrReimbursementOverAssetsDateOfTermination" xlink:label="FeeWaiverOrReimbursementOverAssetsDateOfTermination" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="FeeWaiverOrReimbursementOverAssetsDateOfTermination" order="13.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ClassAxis" xlink:label="ClassAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ClassAxis" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ShareClassDomain" xlink:label="ShareClassDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="ShareClassDomain" order="1.0" priority="1" />
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/11/role/ExpenseExample" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:link="http://www.xbrl.org/2003/linkbase">
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusTable" xlink:label="ProspectusTable" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="DocumentInformationDocumentAxis" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentDomain" xlink:label="DocumentDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="DocumentInformationDocumentAxis" xlink:to="DocumentDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="CoregistrantAxis" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AllCoregistrantsMember" xlink:label="AllCoregistrantsMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="CoregistrantAxis" xlink:to="AllCoregistrantsMember" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="LegalEntityAxis" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityDomain" xlink:label="EntityDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="EntityDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusLineItems" xlink:label="ProspectusLineItems" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ProspectusLineItems" order="5.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleByYearColumnName" xlink:label="ExpenseExampleByYearColumnName" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleByYearColumnName" use="optional" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleYear01" xlink:label="ExpenseExampleYear01" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleYear01" use="optional" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleYear03" xlink:label="ExpenseExampleYear03" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleYear03" use="optional" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleYear05" xlink:label="ExpenseExampleYear05" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleYear05" use="optional" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleYear10" xlink:label="ExpenseExampleYear10" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleYear10" use="optional" order="5.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ClassAxis" xlink:label="ClassAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ClassAxis" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ShareClassDomain" xlink:label="ShareClassDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="ShareClassDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleAbstract" xlink:label="ExpenseExampleAbstract" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ExpenseExampleAbstract" xlink:to="ProspectusTable" order="1.0" priority="1" />
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/11/role/ExpenseExampleNoRedemption" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:link="http://www.xbrl.org/2003/linkbase">
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusTable" xlink:label="ProspectusTable" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="DocumentInformationDocumentAxis" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentDomain" xlink:label="DocumentDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="DocumentInformationDocumentAxis" xlink:to="DocumentDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="CoregistrantAxis" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AllCoregistrantsMember" xlink:label="AllCoregistrantsMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="CoregistrantAxis" xlink:to="AllCoregistrantsMember" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="LegalEntityAxis" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityDomain" xlink:label="EntityDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="EntityDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusLineItems" xlink:label="ProspectusLineItems" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ProspectusLineItems" order="5.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleNoRedemptionByYearColumnName" xlink:label="ExpenseExampleNoRedemptionByYearColumnName" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleNoRedemptionByYearColumnName" use="optional" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleNoRedemptionYear01" xlink:label="ExpenseExampleNoRedemptionYear01" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleNoRedemptionYear01" use="optional" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleNoRedemptionYear03" xlink:label="ExpenseExampleNoRedemptionYear03" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleNoRedemptionYear03" use="optional" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleNoRedemptionYear05" xlink:label="ExpenseExampleNoRedemptionYear05" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleNoRedemptionYear05" use="optional" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleNoRedemptionYear10" xlink:label="ExpenseExampleNoRedemptionYear10" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleNoRedemptionYear10" use="optional" order="5.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ClassAxis" xlink:label="ClassAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ClassAxis" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ShareClassDomain" xlink:label="ShareClassDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="ShareClassDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleNoRedemptionAbstract" xlink:label="ExpenseExampleNoRedemptionAbstract" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ExpenseExampleNoRedemptionAbstract" xlink:to="ProspectusTable" order="1.0" priority="1" />
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/11/role/BarChartData" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:link="http://www.xbrl.org/2003/linkbase">
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusTable" xlink:label="ProspectusTable" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="DocumentInformationDocumentAxis" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentDomain" xlink:label="DocumentDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="DocumentInformationDocumentAxis" xlink:to="DocumentDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="CoregistrantAxis" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AllCoregistrantsMember" xlink:label="AllCoregistrantsMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="CoregistrantAxis" xlink:to="AllCoregistrantsMember" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="LegalEntityAxis" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityDomain" xlink:label="EntityDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="EntityDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusLineItems" xlink:label="ProspectusLineItems" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ProspectusLineItems" order="5.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AnnualReturnCaption" xlink:label="AnnualReturnCaption" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="AnnualReturnCaption" use="optional" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AnnualReturnColumnName" xlink:label="AnnualReturnColumnName" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="AnnualReturnColumnName" use="optional" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AnnualReturnInceptionDate" xlink:label="AnnualReturnInceptionDate" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="AnnualReturnInceptionDate" use="optional" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AnnlRtrPct" xlink:label="AnnlRtrPct" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="AnnlRtrPct" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ClassAxis" xlink:label="ClassAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ClassAxis" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ShareClassDomain" xlink:label="ShareClassDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="ShareClassDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_BarChartTableAbstract" xlink:label="BarChartTableAbstract" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="BarChartTableAbstract" xlink:to="ProspectusTable" order="1.0" priority="1" />
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/11/role/PerformanceTableData" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:link="http://www.xbrl.org/2003/linkbase">
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusTable" xlink:label="ProspectusTable" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="DocumentInformationDocumentAxis" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentDomain" xlink:label="DocumentDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="DocumentInformationDocumentAxis" xlink:to="DocumentDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="CoregistrantAxis" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AllCoregistrantsMember" xlink:label="AllCoregistrantsMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="CoregistrantAxis" xlink:to="AllCoregistrantsMember" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusLineItems" xlink:label="ProspectusLineItems" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ProspectusLineItems" order="5.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AverageAnnualReturnLabel" xlink:label="AverageAnnualReturnLabel" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="AverageAnnualReturnLabel" use="optional" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AvgAnnlRtrPct" xlink:label="AvgAnnlRtrPct" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="AvgAnnlRtrPct" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerfInceptionDate" xlink:label="PerfInceptionDate" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerfInceptionDate" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ClassAxis" xlink:label="ClassAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ClassAxis" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ShareClassDomain" xlink:label="ShareClassDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="ShareClassDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceMeasureAxis" xlink:label="PerformanceMeasureAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="PerformanceMeasureAxis" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceMeasureDomain" xlink:label="PerformanceMeasureDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="PerformanceMeasureAxis" xlink:to="PerformanceMeasureDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AfterTaxesOnDistributionsMember" xlink:label="AfterTaxesOnDistributionsMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="PerformanceMeasureDomain" xlink:to="AfterTaxesOnDistributionsMember" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AfterTaxesOnDistributionsAndSalesMember" xlink:label="AfterTaxesOnDistributionsAndSalesMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="PerformanceMeasureDomain" xlink:to="AfterTaxesOnDistributionsAndSalesMember" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AverageAnnualReturnAbstract" xlink:label="AverageAnnualReturnAbstract" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="AverageAnnualReturnAbstract" xlink:to="ProspectusTable" order="1.0" priority="1" />
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/11/role/N1aCover" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:link="http://www.xbrl.org/2003/linkbase">
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_FormN1aAbstract" xlink:label="FormN1aAbstract" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusTable" xlink:label="ProspectusTable" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="FormN1aAbstract" xlink:to="ProspectusTable" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="DocumentInformationDocumentAxis" use="optional" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentDomain" xlink:label="DocumentDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="DocumentInformationDocumentAxis" xlink:to="DocumentDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="CoregistrantAxis" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AllCoregistrantsMember" xlink:label="AllCoregistrantsMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="CoregistrantAxis" xlink:to="AllCoregistrantsMember" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusLineItems" xlink:label="ProspectusLineItems" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ProspectusLineItems" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentType" xlink:label="DocumentType" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="DocumentType" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_AmendmentFlag" xlink:label="AmendmentFlag" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="AmendmentFlag" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_AmendmentDescription" xlink:label="AmendmentDescription" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="AmendmentDescription" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityRegistrantName" xlink:label="EntityRegistrantName" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="EntityRegistrantName" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityCentralIndexKey" xlink:label="EntityCentralIndexKey" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="EntityCentralIndexKey" order="5.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityInvCompanyType" xlink:label="EntityInvCompanyType" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="EntityInvCompanyType" order="6.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentPeriodEndDate" xlink:label="DocumentPeriodEndDate" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="DocumentPeriodEndDate" order="7.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusDate" xlink:label="ProspectusDate" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ProspectusDate" order="8.0" priority="1" />
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/11/role/PerformanceManagement" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:link="http://www.xbrl.org/2003/linkbase">
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_FormN1aAbstract" xlink:label="FormN1aAbstract" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusTable" xlink:label="ProspectusTable" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="FormN1aAbstract" xlink:to="ProspectusTable" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="DocumentInformationDocumentAxis" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentDomain" xlink:label="DocumentDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="DocumentInformationDocumentAxis" xlink:to="DocumentDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="CoregistrantAxis" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AllCoregistrantsMember" xlink:label="AllCoregistrantsMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="CoregistrantAxis" xlink:to="AllCoregistrantsMember" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="LegalEntityAxis" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityDomain" xlink:label="EntityDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="EntityDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusLineItems" xlink:label="ProspectusLineItems" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ProspectusLineItems" order="5.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_BarChartAndPerformanceTableHeading" xlink:label="BarChartAndPerformanceTableHeading" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="BarChartAndPerformanceTableHeading" use="optional" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceNarrativeTextBlock" xlink:label="PerformanceNarrativeTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformanceNarrativeTextBlock" use="optional" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_BarChartNarrativeTextBlock" xlink:label="BarChartNarrativeTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="BarChartNarrativeTextBlock" use="optional" order="7.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_BarChartHeading" xlink:label="BarChartHeading" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="BarChartHeading" use="optional" order="11.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_BarChartFootnotesTextBlock" xlink:label="BarChartFootnotesTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="BarChartFootnotesTextBlock" use="optional" order="13.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_BarChartClosingTextBlock" xlink:label="BarChartClosingTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="BarChartClosingTextBlock" use="optional" order="14.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceTableHeading" xlink:label="PerformanceTableHeading" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformanceTableHeading" use="optional" order="24.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceTableNarrativeTextBlock" xlink:label="PerformanceTableNarrativeTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformanceTableNarrativeTextBlock" use="optional" order="25.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceTableClosingTextBlock" xlink:label="PerformanceTableClosingTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformanceTableClosingTextBlock" use="optional" order="39.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_BarChartTableTextBlock" xlink:label="BarChartTableTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="BarChartTableTextBlock" use="optional" order="12.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceTableTextBlock" xlink:label="PerformanceTableTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformanceTableTextBlock" use="optional" order="31.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_MarketIndexPerformanceTableTextBlock" xlink:label="MarketIndexPerformanceTableTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="MarketIndexPerformanceTableTextBlock" use="optional" order="34.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_MoneyMarketSevenDayYieldCaption" xlink:label="MoneyMarketSevenDayYieldCaption" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="MoneyMarketSevenDayYieldCaption" order="40.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_MoneyMarketSevenDayYieldColumnName" xlink:label="MoneyMarketSevenDayYieldColumnName" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="MoneyMarketSevenDayYieldColumnName" order="41.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_MoneyMarketSevenDayYieldPhone" xlink:label="MoneyMarketSevenDayYieldPhone" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="MoneyMarketSevenDayYieldPhone" order="42.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_MoneyMarketSevenDayYield" xlink:label="MoneyMarketSevenDayYield" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="MoneyMarketSevenDayYield" order="43.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_MoneyMarketSevenDayTaxEquivalentYield" xlink:label="MoneyMarketSevenDayTaxEquivalentYield" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="MoneyMarketSevenDayTaxEquivalentYield" order="44.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ThirtyDayYieldCaption" xlink:label="ThirtyDayYieldCaption" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ThirtyDayYieldCaption" order="45.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ThirtyDayYieldColumnName" xlink:label="ThirtyDayYieldColumnName" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ThirtyDayYieldColumnName" order="46.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ThirtyDayYieldPhone" xlink:label="ThirtyDayYieldPhone" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ThirtyDayYieldPhone" order="47.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ThirtyDayYield" xlink:label="ThirtyDayYield" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ThirtyDayYield" order="48.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ThirtyDayTaxEquivalentYield" xlink:label="ThirtyDayTaxEquivalentYield" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ThirtyDayTaxEquivalentYield" order="49.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceAvailabilityWebSiteAddress" xlink:label="PerformanceAvailabilityWebSiteAddress" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformanceAvailabilityWebSiteAddress" order="50.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceAvailabilityPhone" xlink:label="PerformanceAvailabilityPhone" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformanceAvailabilityPhone" order="51.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceTableFootnotesTextBlock" xlink:label="PerformanceTableFootnotesTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformanceTableFootnotesTextBlock" use="optional" order="35.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceTableFootnotesReasonPerformanceInformationForClassDifferentFromImmediatelyPrecedingPeriod" xlink:label="PerformanceTableFootnotesReasonPerformanceInformationForClassDifferentFromImmediatelyPrecedingPeriod" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformanceTableFootnotesReasonPerformanceInformationForClassDifferentFromImmediatelyPrecedingPeriod" order="36.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceTableOneClassOfAfterTaxShown" xlink:label="PerformanceTableOneClassOfAfterTaxShown" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformanceTableOneClassOfAfterTaxShown" order="37.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_IndexNoDeductionForFeesExpensesTaxes" xlink:label="IndexNoDeductionForFeesExpensesTaxes" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="IndexNoDeductionForFeesExpensesTaxes" order="38.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AverageAnnualReturnCaption" xlink:label="AverageAnnualReturnCaption" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="AverageAnnualReturnCaption" order="32.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AverageAnnualReturnColumnName" xlink:label="AverageAnnualReturnColumnName" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="AverageAnnualReturnColumnName" order="33.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceTableDoesReflectSalesLoads" xlink:label="PerformanceTableDoesReflectSalesLoads" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformanceTableDoesReflectSalesLoads" order="26.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceTableMarketIndexChanged" xlink:label="PerformanceTableMarketIndexChanged" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformanceTableMarketIndexChanged" order="27.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceTableUsesHighestFederalRate" xlink:label="PerformanceTableUsesHighestFederalRate" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformanceTableUsesHighestFederalRate" order="28.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceTableNotRelevantToTaxDeferred" xlink:label="PerformanceTableNotRelevantToTaxDeferred" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformanceTableNotRelevantToTaxDeferred" order="29.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceTableExplanationAfterTaxHigher" xlink:label="PerformanceTableExplanationAfterTaxHigher" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformanceTableExplanationAfterTaxHigher" order="30.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_YearToDateReturnLabel" xlink:label="YearToDateReturnLabel" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="YearToDateReturnLabel" order="15.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_BarChartYearToDateReturn" xlink:label="BarChartYearToDateReturn" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="BarChartYearToDateReturn" order="16.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_BarChartYearToDateReturnDate" xlink:label="BarChartYearToDateReturnDate" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="BarChartYearToDateReturnDate" order="17.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_HighestQuarterlyReturnLabel" xlink:label="HighestQuarterlyReturnLabel" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="HighestQuarterlyReturnLabel" order="18.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_BarChartHighestQuarterlyReturn" xlink:label="BarChartHighestQuarterlyReturn" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="BarChartHighestQuarterlyReturn" order="19.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_BarChartHighestQuarterlyReturnDate" xlink:label="BarChartHighestQuarterlyReturnDate" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="BarChartHighestQuarterlyReturnDate" order="20.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_LowestQuarterlyReturnLabel" xlink:label="LowestQuarterlyReturnLabel" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="LowestQuarterlyReturnLabel" order="21.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_BarChartLowestQuarterlyReturn" xlink:label="BarChartLowestQuarterlyReturn" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="BarChartLowestQuarterlyReturn" order="22.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_BarChartLowestQuarterlyReturnDate" xlink:label="BarChartLowestQuarterlyReturnDate" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="BarChartLowestQuarterlyReturnDate" order="23.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_BarChartDoesNotReflectSalesLoads" xlink:label="BarChartDoesNotReflectSalesLoads" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="BarChartDoesNotReflectSalesLoads" order="8.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_BarChartReturnsForClassNotOfferedInProspectus" xlink:label="BarChartReturnsForClassNotOfferedInProspectus" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="BarChartReturnsForClassNotOfferedInProspectus" order="9.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_BarChartReasonSelectedClassDifferentFromImmediatelyPrecedingPeriod" xlink:label="BarChartReasonSelectedClassDifferentFromImmediatelyPrecedingPeriod" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="BarChartReasonSelectedClassDifferentFromImmediatelyPrecedingPeriod" order="10.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformancePastDoesNotIndicateFuture" xlink:label="PerformancePastDoesNotIndicateFuture" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformancePastDoesNotIndicateFuture" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceInformationIllustratesVariabilityOfReturns" xlink:label="PerformanceInformationIllustratesVariabilityOfReturns" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformanceInformationIllustratesVariabilityOfReturns" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceOneYearOrLess" xlink:label="PerformanceOneYearOrLess" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformanceOneYearOrLess" order="5.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceAdditionalMarketIndex" xlink:label="PerformanceAdditionalMarketIndex" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformanceAdditionalMarketIndex" order="6.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ClassAxis" xlink:label="ClassAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ClassAxis" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ShareClassDomain" xlink:label="ShareClassDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="ShareClassDomain" order="1.0" priority="1" />
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/11/role/InvestmentRisks" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:link="http://www.xbrl.org/2003/linkbase">
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusTable" xlink:label="ProspectusTable" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="DocumentInformationDocumentAxis" use="optional" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentDomain" xlink:label="DocumentDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="DocumentInformationDocumentAxis" xlink:to="DocumentDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="CoregistrantAxis" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AllCoregistrantsMember" xlink:label="AllCoregistrantsMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="CoregistrantAxis" xlink:to="AllCoregistrantsMember" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="LegalEntityAxis" use="optional" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityDomain" xlink:label="EntityDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="EntityDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusLineItems" xlink:label="ProspectusLineItems" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ProspectusLineItems" order="5.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_RiskTextBlock" xlink:label="RiskTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="RiskTextBlock" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_RiskAxis" xlink:label="RiskAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="RiskAxis" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AllRisksMember" xlink:label="AllRisksMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="RiskAxis" xlink:to="AllRisksMember" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_RiskLoseMoneyMember" xlink:label="RiskLoseMoneyMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="RiskAxis" xlink:to="RiskLoseMoneyMember" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_RiskNotInsuredDepositoryInstitutionMember" xlink:label="RiskNotInsuredDepositoryInstitutionMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="RiskAxis" xlink:to="RiskNotInsuredDepositoryInstitutionMember" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_RiskNotInsuredMember" xlink:label="RiskNotInsuredMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="RiskAxis" xlink:to="RiskNotInsuredMember" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_RiskNondiversifiedStatusMember" xlink:label="RiskNondiversifiedStatusMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="RiskAxis" xlink:to="RiskNondiversifiedStatusMember" order="5.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_RiskMoneyMarketFundPriceFluctuatesMember" xlink:label="RiskMoneyMarketFundPriceFluctuatesMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="RiskAxis" xlink:to="RiskMoneyMarketFundPriceFluctuatesMember" order="6.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_RiskMoneyMarketFundMayImposeFeesOrSuspendSalesMember" xlink:label="RiskMoneyMarketFundMayImposeFeesOrSuspendSalesMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="RiskAxis" xlink:to="RiskMoneyMarketFundMayImposeFeesOrSuspendSalesMember" order="7.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_RiskMoneyMarketFundMayNotPreserveDollarMember" xlink:label="RiskMoneyMarketFundMayNotPreserveDollarMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="RiskAxis" xlink:to="RiskMoneyMarketFundMayNotPreserveDollarMember" order="8.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_RiskMoneyMarketFundSponsorMayNotProvideSupportMember" xlink:label="RiskMoneyMarketFundSponsorMayNotProvideSupportMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="RiskAxis" xlink:to="RiskMoneyMarketFundSponsorMayNotProvideSupportMember" order="9.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_RisksAbstract" xlink:label="RisksAbstract" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="RisksAbstract" xlink:to="ProspectusTable" use="optional" order="1.0" priority="1" />
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/11/role/InvestmentStrategy" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:link="http://www.xbrl.org/2003/linkbase">
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_FormN1aAbstract" xlink:label="FormN1aAbstract" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusTable" xlink:label="ProspectusTable" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="FormN1aAbstract" xlink:to="ProspectusTable" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="DocumentInformationDocumentAxis" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentDomain" xlink:label="DocumentDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="DocumentInformationDocumentAxis" xlink:to="DocumentDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="CoregistrantAxis" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AllCoregistrantsMember" xlink:label="AllCoregistrantsMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="CoregistrantAxis" xlink:to="AllCoregistrantsMember" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="LegalEntityAxis" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityDomain" xlink:label="EntityDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="EntityDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusLineItems" xlink:label="ProspectusLineItems" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ProspectusLineItems" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_StrategyHeading" xlink:label="StrategyHeading" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="StrategyHeading" use="optional" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_StrategyNarrativeTextBlock" xlink:label="StrategyNarrativeTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="StrategyNarrativeTextBlock" use="optional" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_StrategyPortfolioConcentration" xlink:label="StrategyPortfolioConcentration" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="StrategyPortfolioConcentration" order="3.0" priority="1" />
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/11/role/FeesAndExpenses" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:link="http://www.xbrl.org/2003/linkbase">
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_FormN1aAbstract" xlink:label="FormN1aAbstract" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusTable" xlink:label="ProspectusTable" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="FormN1aAbstract" xlink:to="ProspectusTable" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="DocumentInformationDocumentAxis" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentDomain" xlink:label="DocumentDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="DocumentInformationDocumentAxis" xlink:to="DocumentDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="CoregistrantAxis" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AllCoregistrantsMember" xlink:label="AllCoregistrantsMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="CoregistrantAxis" xlink:to="AllCoregistrantsMember" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="LegalEntityAxis" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityDomain" xlink:label="EntityDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="EntityDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusLineItems" xlink:label="ProspectusLineItems" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ProspectusLineItems" order="5.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseHeading" xlink:label="ExpenseHeading" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseHeading" use="optional" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseNarrativeTextBlock" xlink:label="ExpenseNarrativeTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseNarrativeTextBlock" use="optional" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ShareholderFeesCaption" xlink:label="ShareholderFeesCaption" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ShareholderFeesCaption" use="optional" order="11.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_OperatingExpensesCaption" xlink:label="OperatingExpensesCaption" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="OperatingExpensesCaption" use="optional" order="13.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseFootnotesTextBlock" xlink:label="ExpenseFootnotesTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseFootnotesTextBlock" use="optional" order="15.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpensesDeferredChargesTextBlock" xlink:label="ExpensesDeferredChargesTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpensesDeferredChargesTextBlock" use="optional" order="16.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpensesRangeOfExchangeFeesTextBlock" xlink:label="ExpensesRangeOfExchangeFeesTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpensesRangeOfExchangeFeesTextBlock" use="optional" order="17.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleHeading" xlink:label="ExpenseExampleHeading" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleHeading" use="optional" order="18.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleByYearHeading" xlink:label="ExpenseExampleByYearHeading" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleByYearHeading" use="optional" order="19.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleNarrativeTextBlock" xlink:label="ExpenseExampleNarrativeTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleNarrativeTextBlock" use="optional" order="20.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleByYearCaption" xlink:label="ExpenseExampleByYearCaption" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleByYearCaption" use="optional" order="21.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleNoRedemptionNarrativeTextBlock" xlink:label="ExpenseExampleNoRedemptionNarrativeTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleNoRedemptionNarrativeTextBlock" use="optional" order="23.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleNoRedemptionByYearCaption" xlink:label="ExpenseExampleNoRedemptionByYearCaption" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleNoRedemptionByYearCaption" use="optional" order="24.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleFootnotesTextBlock" xlink:label="ExpenseExampleFootnotesTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleFootnotesTextBlock" use="optional" order="26.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleClosingTextBlock" xlink:label="ExpenseExampleClosingTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleClosingTextBlock" use="optional" order="27.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PortfolioTurnoverHeading" xlink:label="PortfolioTurnoverHeading" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PortfolioTurnoverHeading" use="optional" order="28.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PortfolioTurnoverTextBlock" xlink:label="PortfolioTurnoverTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PortfolioTurnoverTextBlock" use="optional" order="29.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ShareholderFeesTableTextBlock" xlink:label="ShareholderFeesTableTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ShareholderFeesTableTextBlock" use="optional" order="12.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AnnualFundOperatingExpensesTableTextBlock" xlink:label="AnnualFundOperatingExpensesTableTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="AnnualFundOperatingExpensesTableTextBlock" use="optional" order="14.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleWithRedemptionTableTextBlock" xlink:label="ExpenseExampleWithRedemptionTableTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleWithRedemptionTableTextBlock" use="optional" order="22.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleNoRedemptionTableTextBlock" xlink:label="ExpenseExampleNoRedemptionTableTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleNoRedemptionTableTextBlock" use="optional" order="25.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PortfolioTurnoverRate" xlink:label="PortfolioTurnoverRate" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PortfolioTurnoverRate" order="30.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseBreakpointDiscounts" xlink:label="ExpenseBreakpointDiscounts" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseBreakpointDiscounts" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpensesOtherExpensesHadExtraordinaryExpensesBeenIncluded" xlink:label="ExpensesOtherExpensesHadExtraordinaryExpensesBeenIncluded" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpensesOtherExpensesHadExtraordinaryExpensesBeenIncluded" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpensesRestatedToReflectCurrent" xlink:label="ExpensesRestatedToReflectCurrent" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpensesRestatedToReflectCurrent" order="5.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseBreakpointMinimumInvestmentRequiredAmount" xlink:label="ExpenseBreakpointMinimumInvestmentRequiredAmount" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseBreakpointMinimumInvestmentRequiredAmount" order="6.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_OtherExpensesNewFundBasedOnEstimates" xlink:label="OtherExpensesNewFundBasedOnEstimates" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="OtherExpensesNewFundBasedOnEstimates" order="7.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AcquiredFundFeesAndExpensesBasedOnEstimates" xlink:label="AcquiredFundFeesAndExpensesBasedOnEstimates" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="AcquiredFundFeesAndExpensesBasedOnEstimates" order="8.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpensesNotCorrelatedToRatioDueToAcquiredFundFees" xlink:label="ExpensesNotCorrelatedToRatioDueToAcquiredFundFees" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpensesNotCorrelatedToRatioDueToAcquiredFundFees" order="9.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpensesExplanationOfNonrecurringAccountFee" xlink:label="ExpensesExplanationOfNonrecurringAccountFee" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpensesExplanationOfNonrecurringAccountFee" order="10.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ClassAxis" xlink:label="ClassAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ClassAxis" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ShareClassDomain" xlink:label="ShareClassDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="ShareClassDomain" order="1.0" priority="1" />
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/11/role/N1aSupplement" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:link="http://www.xbrl.org/2003/linkbase">
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_FormN1aAbstract" xlink:label="FormN1aAbstract" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusTable" xlink:label="ProspectusTable" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="FormN1aAbstract" xlink:to="ProspectusTable" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="DocumentInformationDocumentAxis" use="optional" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentDomain" xlink:label="DocumentDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="DocumentInformationDocumentAxis" xlink:to="DocumentDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="CoregistrantAxis" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AllCoregistrantsMember" xlink:label="AllCoregistrantsMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="CoregistrantAxis" xlink:to="AllCoregistrantsMember" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="LegalEntityAxis" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityDomain" xlink:label="EntityDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="EntityDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusLineItems" xlink:label="ProspectusLineItems" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ProspectusLineItems" order="5.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_SupplementToProspectusTextBlock" xlink:label="SupplementToProspectusTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="SupplementToProspectusTextBlock" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ClassAxis" xlink:label="ClassAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ClassAxis" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ShareClassDomain" xlink:label="ShareClassDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="ShareClassDomain" order="1.0" priority="1" />
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/12/role/RiskReturn" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:link="http://www.xbrl.org/2003/linkbase">
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_FormN1aAbstract" xlink:label="FormN1aAbstract" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusTable" xlink:label="ProspectusTable" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="FormN1aAbstract" xlink:to="ProspectusTable" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="DocumentInformationDocumentAxis" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentDomain" xlink:label="DocumentDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="DocumentInformationDocumentAxis" xlink:to="DocumentDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="CoregistrantAxis" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AllCoregistrantsMember" xlink:label="AllCoregistrantsMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="CoregistrantAxis" xlink:to="AllCoregistrantsMember" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="LegalEntityAxis" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityDomain" xlink:label="EntityDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="EntityDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusLineItems" xlink:label="ProspectusLineItems" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ProspectusLineItems" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_RiskReturnHeading" xlink:label="RiskReturnHeading" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="RiskReturnHeading" use="optional" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ObjectiveHeading" xlink:label="ObjectiveHeading" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ObjectiveHeading" use="optional" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ObjectivePrimaryTextBlock" xlink:label="ObjectivePrimaryTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ObjectivePrimaryTextBlock" use="optional" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ObjectiveSecondaryTextBlock" xlink:label="ObjectiveSecondaryTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ObjectiveSecondaryTextBlock" use="optional" order="4.0" priority="1" />
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/12/role/ShareholderFeesData" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:link="http://www.xbrl.org/2003/linkbase">
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusTable" xlink:label="ProspectusTable" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="DocumentInformationDocumentAxis" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentDomain" xlink:label="DocumentDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="DocumentInformationDocumentAxis" xlink:to="DocumentDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="CoregistrantAxis" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AllCoregistrantsMember" xlink:label="AllCoregistrantsMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="CoregistrantAxis" xlink:to="AllCoregistrantsMember" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="LegalEntityAxis" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityDomain" xlink:label="EntityDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="EntityDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusLineItems" xlink:label="ProspectusLineItems" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ProspectusLineItems" order="5.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ShareholderFeesColumnName" xlink:label="ShareholderFeesColumnName" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ShareholderFeesColumnName" use="optional" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_MaximumCumulativeSalesChargeOverOfferingPrice" xlink:label="MaximumCumulativeSalesChargeOverOfferingPrice" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="MaximumCumulativeSalesChargeOverOfferingPrice" use="optional" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_MaximumCumulativeSalesChargeOverOther" xlink:label="MaximumCumulativeSalesChargeOverOther" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="MaximumCumulativeSalesChargeOverOther" use="optional" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice" xlink:label="MaximumSalesChargeImposedOnPurchasesOverOfferingPrice" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="MaximumSalesChargeImposedOnPurchasesOverOfferingPrice" use="optional" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_MaximumDeferredSalesChargeOverOfferingPrice" xlink:label="MaximumDeferredSalesChargeOverOfferingPrice" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="MaximumDeferredSalesChargeOverOfferingPrice" use="optional" order="5.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_MaximumDeferredSalesChargeOverOther" xlink:label="MaximumDeferredSalesChargeOverOther" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="MaximumDeferredSalesChargeOverOther" use="optional" order="6.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther" xlink:label="MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther" use="optional" order="7.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_RedemptionFeeOverRedemption" xlink:label="RedemptionFeeOverRedemption" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="RedemptionFeeOverRedemption" use="optional" order="8.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_RedemptionFee" xlink:label="RedemptionFee" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="RedemptionFee" use="optional" order="9.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExchangeFeeOverRedemption" xlink:label="ExchangeFeeOverRedemption" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExchangeFeeOverRedemption" use="optional" order="10.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExchangeFee" xlink:label="ExchangeFee" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExchangeFee" use="optional" order="11.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_MaximumAccountFeeOverAssets" xlink:label="MaximumAccountFeeOverAssets" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="MaximumAccountFeeOverAssets" use="optional" order="12.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_MaximumAccountFee" xlink:label="MaximumAccountFee" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="MaximumAccountFee" use="optional" order="13.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ShareholderFeeOther" xlink:label="ShareholderFeeOther" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ShareholderFeeOther" use="optional" order="14.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ClassAxis" xlink:label="ClassAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ClassAxis" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ShareClassDomain" xlink:label="ShareClassDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="ShareClassDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ShareholderFeesAbstract" xlink:label="ShareholderFeesAbstract" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ShareholderFeesAbstract" xlink:to="ProspectusTable" order="1.0" priority="1" />
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/12/role/OperatingExpensesData" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:link="http://www.xbrl.org/2003/linkbase">
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_FormN1aAbstract" xlink:label="FormN1aAbstract" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusTable" xlink:label="ProspectusTable" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="FormN1aAbstract" xlink:to="ProspectusTable" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="DocumentInformationDocumentAxis" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentDomain" xlink:label="DocumentDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="DocumentInformationDocumentAxis" xlink:to="DocumentDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="CoregistrantAxis" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AllCoregistrantsMember" xlink:label="AllCoregistrantsMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="CoregistrantAxis" xlink:to="AllCoregistrantsMember" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="LegalEntityAxis" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityDomain" xlink:label="EntityDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="EntityDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusLineItems" xlink:label="ProspectusLineItems" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ProspectusLineItems" order="5.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_OperatingExpensesColumnName" xlink:label="OperatingExpensesColumnName" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="OperatingExpensesColumnName" use="optional" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ManagementFeesOverAssets" xlink:label="ManagementFeesOverAssets" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ManagementFeesOverAssets" use="optional" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_DistributionAndService12b1FeesOverAssets" xlink:label="DistributionAndService12b1FeesOverAssets" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="DistributionAndService12b1FeesOverAssets" use="optional" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_DistributionOrSimilarNon12b1FeesOverAssets" xlink:label="DistributionOrSimilarNon12b1FeesOverAssets" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="DistributionOrSimilarNon12b1FeesOverAssets" use="optional" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_Component1OtherExpensesOverAssets" xlink:label="Component1OtherExpensesOverAssets" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="Component1OtherExpensesOverAssets" use="optional" order="5.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_Component2OtherExpensesOverAssets" xlink:label="Component2OtherExpensesOverAssets" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="Component2OtherExpensesOverAssets" use="optional" order="6.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_Component3OtherExpensesOverAssets" xlink:label="Component3OtherExpensesOverAssets" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="Component3OtherExpensesOverAssets" use="optional" order="7.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_OtherExpensesOverAssets" xlink:label="OtherExpensesOverAssets" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="OtherExpensesOverAssets" use="optional" order="8.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AcquiredFundFeesAndExpensesOverAssets" xlink:label="AcquiredFundFeesAndExpensesOverAssets" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="AcquiredFundFeesAndExpensesOverAssets" use="optional" order="9.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpensesOverAssets" xlink:label="ExpensesOverAssets" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpensesOverAssets" use="optional" order="10.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_FeeWaiverOrReimbursementOverAssets" xlink:label="FeeWaiverOrReimbursementOverAssets" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="FeeWaiverOrReimbursementOverAssets" use="optional" order="11.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_NetExpensesOverAssets" xlink:label="NetExpensesOverAssets" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="NetExpensesOverAssets" use="optional" order="12.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_FeeWaiverOrReimbursementOverAssetsDateOfTermination" xlink:label="FeeWaiverOrReimbursementOverAssetsDateOfTermination" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="FeeWaiverOrReimbursementOverAssetsDateOfTermination" order="13.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ClassAxis" xlink:label="ClassAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ClassAxis" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ShareClassDomain" xlink:label="ShareClassDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="ShareClassDomain" order="1.0" priority="1" />
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/12/role/ExpenseExample" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:link="http://www.xbrl.org/2003/linkbase">
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusTable" xlink:label="ProspectusTable" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="DocumentInformationDocumentAxis" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentDomain" xlink:label="DocumentDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="DocumentInformationDocumentAxis" xlink:to="DocumentDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="CoregistrantAxis" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AllCoregistrantsMember" xlink:label="AllCoregistrantsMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="CoregistrantAxis" xlink:to="AllCoregistrantsMember" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="LegalEntityAxis" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityDomain" xlink:label="EntityDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="EntityDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusLineItems" xlink:label="ProspectusLineItems" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ProspectusLineItems" order="5.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleByYearColumnName" xlink:label="ExpenseExampleByYearColumnName" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleByYearColumnName" use="optional" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleYear01" xlink:label="ExpenseExampleYear01" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleYear01" use="optional" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleYear03" xlink:label="ExpenseExampleYear03" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleYear03" use="optional" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleYear05" xlink:label="ExpenseExampleYear05" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleYear05" use="optional" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleYear10" xlink:label="ExpenseExampleYear10" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleYear10" use="optional" order="5.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ClassAxis" xlink:label="ClassAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ClassAxis" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ShareClassDomain" xlink:label="ShareClassDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="ShareClassDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleAbstract" xlink:label="ExpenseExampleAbstract" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ExpenseExampleAbstract" xlink:to="ProspectusTable" order="1.0" priority="1" />
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/12/role/ExpenseExampleNoRedemption" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:link="http://www.xbrl.org/2003/linkbase">
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusTable" xlink:label="ProspectusTable" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="DocumentInformationDocumentAxis" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentDomain" xlink:label="DocumentDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="DocumentInformationDocumentAxis" xlink:to="DocumentDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="CoregistrantAxis" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AllCoregistrantsMember" xlink:label="AllCoregistrantsMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="CoregistrantAxis" xlink:to="AllCoregistrantsMember" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="LegalEntityAxis" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityDomain" xlink:label="EntityDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="EntityDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusLineItems" xlink:label="ProspectusLineItems" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ProspectusLineItems" order="5.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleNoRedemptionByYearColumnName" xlink:label="ExpenseExampleNoRedemptionByYearColumnName" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleNoRedemptionByYearColumnName" use="optional" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleNoRedemptionYear01" xlink:label="ExpenseExampleNoRedemptionYear01" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleNoRedemptionYear01" use="optional" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleNoRedemptionYear03" xlink:label="ExpenseExampleNoRedemptionYear03" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleNoRedemptionYear03" use="optional" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleNoRedemptionYear05" xlink:label="ExpenseExampleNoRedemptionYear05" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleNoRedemptionYear05" use="optional" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleNoRedemptionYear10" xlink:label="ExpenseExampleNoRedemptionYear10" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleNoRedemptionYear10" use="optional" order="5.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ClassAxis" xlink:label="ClassAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ClassAxis" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ShareClassDomain" xlink:label="ShareClassDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="ShareClassDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleNoRedemptionAbstract" xlink:label="ExpenseExampleNoRedemptionAbstract" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ExpenseExampleNoRedemptionAbstract" xlink:to="ProspectusTable" order="1.0" priority="1" />
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/12/role/BarChartData" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:link="http://www.xbrl.org/2003/linkbase">
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusTable" xlink:label="ProspectusTable" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="DocumentInformationDocumentAxis" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentDomain" xlink:label="DocumentDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="DocumentInformationDocumentAxis" xlink:to="DocumentDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="CoregistrantAxis" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AllCoregistrantsMember" xlink:label="AllCoregistrantsMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="CoregistrantAxis" xlink:to="AllCoregistrantsMember" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="LegalEntityAxis" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityDomain" xlink:label="EntityDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="EntityDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusLineItems" xlink:label="ProspectusLineItems" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ProspectusLineItems" order="5.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AnnualReturnCaption" xlink:label="AnnualReturnCaption" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="AnnualReturnCaption" use="optional" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AnnualReturnColumnName" xlink:label="AnnualReturnColumnName" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="AnnualReturnColumnName" use="optional" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AnnualReturnInceptionDate" xlink:label="AnnualReturnInceptionDate" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="AnnualReturnInceptionDate" use="optional" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AnnlRtrPct" xlink:label="AnnlRtrPct" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="AnnlRtrPct" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ClassAxis" xlink:label="ClassAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ClassAxis" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ShareClassDomain" xlink:label="ShareClassDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="ShareClassDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_BarChartTableAbstract" xlink:label="BarChartTableAbstract" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="BarChartTableAbstract" xlink:to="ProspectusTable" order="1.0" priority="1" />
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/12/role/PerformanceTableData" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:link="http://www.xbrl.org/2003/linkbase">
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusTable" xlink:label="ProspectusTable" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="DocumentInformationDocumentAxis" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentDomain" xlink:label="DocumentDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="DocumentInformationDocumentAxis" xlink:to="DocumentDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="CoregistrantAxis" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AllCoregistrantsMember" xlink:label="AllCoregistrantsMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="CoregistrantAxis" xlink:to="AllCoregistrantsMember" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusLineItems" xlink:label="ProspectusLineItems" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ProspectusLineItems" order="5.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AverageAnnualReturnLabel" xlink:label="AverageAnnualReturnLabel" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="AverageAnnualReturnLabel" use="optional" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AvgAnnlRtrPct" xlink:label="AvgAnnlRtrPct" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="AvgAnnlRtrPct" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerfInceptionDate" xlink:label="PerfInceptionDate" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerfInceptionDate" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ClassAxis" xlink:label="ClassAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ClassAxis" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ShareClassDomain" xlink:label="ShareClassDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="ShareClassDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceMeasureAxis" xlink:label="PerformanceMeasureAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="PerformanceMeasureAxis" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceMeasureDomain" xlink:label="PerformanceMeasureDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="PerformanceMeasureAxis" xlink:to="PerformanceMeasureDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AfterTaxesOnDistributionsMember" xlink:label="AfterTaxesOnDistributionsMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="PerformanceMeasureDomain" xlink:to="AfterTaxesOnDistributionsMember" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AfterTaxesOnDistributionsAndSalesMember" xlink:label="AfterTaxesOnDistributionsAndSalesMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="PerformanceMeasureDomain" xlink:to="AfterTaxesOnDistributionsAndSalesMember" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AverageAnnualReturnAbstract" xlink:label="AverageAnnualReturnAbstract" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="AverageAnnualReturnAbstract" xlink:to="ProspectusTable" order="1.0" priority="1" />
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/12/role/N1aCover" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:link="http://www.xbrl.org/2003/linkbase">
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_FormN1aAbstract" xlink:label="FormN1aAbstract" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusTable" xlink:label="ProspectusTable" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="FormN1aAbstract" xlink:to="ProspectusTable" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="DocumentInformationDocumentAxis" use="optional" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentDomain" xlink:label="DocumentDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="DocumentInformationDocumentAxis" xlink:to="DocumentDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="CoregistrantAxis" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AllCoregistrantsMember" xlink:label="AllCoregistrantsMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="CoregistrantAxis" xlink:to="AllCoregistrantsMember" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusLineItems" xlink:label="ProspectusLineItems" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ProspectusLineItems" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentType" xlink:label="DocumentType" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="DocumentType" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_AmendmentFlag" xlink:label="AmendmentFlag" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="AmendmentFlag" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_AmendmentDescription" xlink:label="AmendmentDescription" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="AmendmentDescription" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityRegistrantName" xlink:label="EntityRegistrantName" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="EntityRegistrantName" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityCentralIndexKey" xlink:label="EntityCentralIndexKey" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="EntityCentralIndexKey" order="5.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityInvCompanyType" xlink:label="EntityInvCompanyType" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="EntityInvCompanyType" order="6.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentPeriodEndDate" xlink:label="DocumentPeriodEndDate" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="DocumentPeriodEndDate" order="7.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusDate" xlink:label="ProspectusDate" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ProspectusDate" order="8.0" priority="1" />
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/12/role/PerformanceManagement" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:link="http://www.xbrl.org/2003/linkbase">
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_FormN1aAbstract" xlink:label="FormN1aAbstract" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusTable" xlink:label="ProspectusTable" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="FormN1aAbstract" xlink:to="ProspectusTable" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="DocumentInformationDocumentAxis" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentDomain" xlink:label="DocumentDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="DocumentInformationDocumentAxis" xlink:to="DocumentDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="CoregistrantAxis" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AllCoregistrantsMember" xlink:label="AllCoregistrantsMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="CoregistrantAxis" xlink:to="AllCoregistrantsMember" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="LegalEntityAxis" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityDomain" xlink:label="EntityDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="EntityDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusLineItems" xlink:label="ProspectusLineItems" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ProspectusLineItems" order="5.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_BarChartAndPerformanceTableHeading" xlink:label="BarChartAndPerformanceTableHeading" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="BarChartAndPerformanceTableHeading" use="optional" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceNarrativeTextBlock" xlink:label="PerformanceNarrativeTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformanceNarrativeTextBlock" use="optional" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_BarChartNarrativeTextBlock" xlink:label="BarChartNarrativeTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="BarChartNarrativeTextBlock" use="optional" order="7.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_BarChartHeading" xlink:label="BarChartHeading" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="BarChartHeading" use="optional" order="11.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_BarChartFootnotesTextBlock" xlink:label="BarChartFootnotesTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="BarChartFootnotesTextBlock" use="optional" order="13.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_BarChartClosingTextBlock" xlink:label="BarChartClosingTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="BarChartClosingTextBlock" use="optional" order="14.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceTableHeading" xlink:label="PerformanceTableHeading" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformanceTableHeading" use="optional" order="24.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceTableNarrativeTextBlock" xlink:label="PerformanceTableNarrativeTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformanceTableNarrativeTextBlock" use="optional" order="25.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceTableClosingTextBlock" xlink:label="PerformanceTableClosingTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformanceTableClosingTextBlock" use="optional" order="39.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_BarChartTableTextBlock" xlink:label="BarChartTableTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="BarChartTableTextBlock" use="optional" order="12.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceTableTextBlock" xlink:label="PerformanceTableTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformanceTableTextBlock" use="optional" order="31.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_MarketIndexPerformanceTableTextBlock" xlink:label="MarketIndexPerformanceTableTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="MarketIndexPerformanceTableTextBlock" use="optional" order="34.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_MoneyMarketSevenDayYieldCaption" xlink:label="MoneyMarketSevenDayYieldCaption" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="MoneyMarketSevenDayYieldCaption" order="40.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_MoneyMarketSevenDayYieldColumnName" xlink:label="MoneyMarketSevenDayYieldColumnName" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="MoneyMarketSevenDayYieldColumnName" order="41.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_MoneyMarketSevenDayYieldPhone" xlink:label="MoneyMarketSevenDayYieldPhone" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="MoneyMarketSevenDayYieldPhone" order="42.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_MoneyMarketSevenDayYield" xlink:label="MoneyMarketSevenDayYield" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="MoneyMarketSevenDayYield" order="43.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_MoneyMarketSevenDayTaxEquivalentYield" xlink:label="MoneyMarketSevenDayTaxEquivalentYield" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="MoneyMarketSevenDayTaxEquivalentYield" order="44.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ThirtyDayYieldCaption" xlink:label="ThirtyDayYieldCaption" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ThirtyDayYieldCaption" order="45.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ThirtyDayYieldColumnName" xlink:label="ThirtyDayYieldColumnName" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ThirtyDayYieldColumnName" order="46.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ThirtyDayYieldPhone" xlink:label="ThirtyDayYieldPhone" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ThirtyDayYieldPhone" order="47.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ThirtyDayYield" xlink:label="ThirtyDayYield" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ThirtyDayYield" order="48.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ThirtyDayTaxEquivalentYield" xlink:label="ThirtyDayTaxEquivalentYield" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ThirtyDayTaxEquivalentYield" order="49.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceAvailabilityWebSiteAddress" xlink:label="PerformanceAvailabilityWebSiteAddress" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformanceAvailabilityWebSiteAddress" order="50.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceAvailabilityPhone" xlink:label="PerformanceAvailabilityPhone" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformanceAvailabilityPhone" order="51.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceTableFootnotesTextBlock" xlink:label="PerformanceTableFootnotesTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformanceTableFootnotesTextBlock" use="optional" order="35.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceTableFootnotesReasonPerformanceInformationForClassDifferentFromImmediatelyPrecedingPeriod" xlink:label="PerformanceTableFootnotesReasonPerformanceInformationForClassDifferentFromImmediatelyPrecedingPeriod" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformanceTableFootnotesReasonPerformanceInformationForClassDifferentFromImmediatelyPrecedingPeriod" order="36.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceTableOneClassOfAfterTaxShown" xlink:label="PerformanceTableOneClassOfAfterTaxShown" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformanceTableOneClassOfAfterTaxShown" order="37.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_IndexNoDeductionForFeesExpensesTaxes" xlink:label="IndexNoDeductionForFeesExpensesTaxes" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="IndexNoDeductionForFeesExpensesTaxes" order="38.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AverageAnnualReturnCaption" xlink:label="AverageAnnualReturnCaption" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="AverageAnnualReturnCaption" order="32.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AverageAnnualReturnColumnName" xlink:label="AverageAnnualReturnColumnName" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="AverageAnnualReturnColumnName" order="33.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceTableDoesReflectSalesLoads" xlink:label="PerformanceTableDoesReflectSalesLoads" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformanceTableDoesReflectSalesLoads" order="26.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceTableMarketIndexChanged" xlink:label="PerformanceTableMarketIndexChanged" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformanceTableMarketIndexChanged" order="27.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceTableUsesHighestFederalRate" xlink:label="PerformanceTableUsesHighestFederalRate" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformanceTableUsesHighestFederalRate" order="28.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceTableNotRelevantToTaxDeferred" xlink:label="PerformanceTableNotRelevantToTaxDeferred" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformanceTableNotRelevantToTaxDeferred" order="29.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceTableExplanationAfterTaxHigher" xlink:label="PerformanceTableExplanationAfterTaxHigher" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformanceTableExplanationAfterTaxHigher" order="30.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_YearToDateReturnLabel" xlink:label="YearToDateReturnLabel" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="YearToDateReturnLabel" order="15.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_BarChartYearToDateReturn" xlink:label="BarChartYearToDateReturn" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="BarChartYearToDateReturn" order="16.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_BarChartYearToDateReturnDate" xlink:label="BarChartYearToDateReturnDate" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="BarChartYearToDateReturnDate" order="17.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_HighestQuarterlyReturnLabel" xlink:label="HighestQuarterlyReturnLabel" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="HighestQuarterlyReturnLabel" order="18.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_BarChartHighestQuarterlyReturn" xlink:label="BarChartHighestQuarterlyReturn" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="BarChartHighestQuarterlyReturn" order="19.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_BarChartHighestQuarterlyReturnDate" xlink:label="BarChartHighestQuarterlyReturnDate" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="BarChartHighestQuarterlyReturnDate" order="20.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_LowestQuarterlyReturnLabel" xlink:label="LowestQuarterlyReturnLabel" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="LowestQuarterlyReturnLabel" order="21.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_BarChartLowestQuarterlyReturn" xlink:label="BarChartLowestQuarterlyReturn" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="BarChartLowestQuarterlyReturn" order="22.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_BarChartLowestQuarterlyReturnDate" xlink:label="BarChartLowestQuarterlyReturnDate" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="BarChartLowestQuarterlyReturnDate" order="23.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_BarChartDoesNotReflectSalesLoads" xlink:label="BarChartDoesNotReflectSalesLoads" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="BarChartDoesNotReflectSalesLoads" order="8.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_BarChartReturnsForClassNotOfferedInProspectus" xlink:label="BarChartReturnsForClassNotOfferedInProspectus" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="BarChartReturnsForClassNotOfferedInProspectus" order="9.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_BarChartReasonSelectedClassDifferentFromImmediatelyPrecedingPeriod" xlink:label="BarChartReasonSelectedClassDifferentFromImmediatelyPrecedingPeriod" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="BarChartReasonSelectedClassDifferentFromImmediatelyPrecedingPeriod" order="10.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformancePastDoesNotIndicateFuture" xlink:label="PerformancePastDoesNotIndicateFuture" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformancePastDoesNotIndicateFuture" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceInformationIllustratesVariabilityOfReturns" xlink:label="PerformanceInformationIllustratesVariabilityOfReturns" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformanceInformationIllustratesVariabilityOfReturns" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceOneYearOrLess" xlink:label="PerformanceOneYearOrLess" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformanceOneYearOrLess" order="5.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceAdditionalMarketIndex" xlink:label="PerformanceAdditionalMarketIndex" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformanceAdditionalMarketIndex" order="6.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ClassAxis" xlink:label="ClassAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ClassAxis" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ShareClassDomain" xlink:label="ShareClassDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="ShareClassDomain" order="1.0" priority="1" />
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/12/role/InvestmentRisks" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:link="http://www.xbrl.org/2003/linkbase">
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusTable" xlink:label="ProspectusTable" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="DocumentInformationDocumentAxis" use="optional" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentDomain" xlink:label="DocumentDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="DocumentInformationDocumentAxis" xlink:to="DocumentDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="CoregistrantAxis" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AllCoregistrantsMember" xlink:label="AllCoregistrantsMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="CoregistrantAxis" xlink:to="AllCoregistrantsMember" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="LegalEntityAxis" use="optional" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityDomain" xlink:label="EntityDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="EntityDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusLineItems" xlink:label="ProspectusLineItems" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ProspectusLineItems" order="5.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_RiskTextBlock" xlink:label="RiskTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="RiskTextBlock" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_RiskAxis" xlink:label="RiskAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="RiskAxis" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AllRisksMember" xlink:label="AllRisksMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="RiskAxis" xlink:to="AllRisksMember" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_RiskLoseMoneyMember" xlink:label="RiskLoseMoneyMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="RiskAxis" xlink:to="RiskLoseMoneyMember" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_RiskNotInsuredDepositoryInstitutionMember" xlink:label="RiskNotInsuredDepositoryInstitutionMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="RiskAxis" xlink:to="RiskNotInsuredDepositoryInstitutionMember" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_RiskNotInsuredMember" xlink:label="RiskNotInsuredMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="RiskAxis" xlink:to="RiskNotInsuredMember" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_RiskNondiversifiedStatusMember" xlink:label="RiskNondiversifiedStatusMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="RiskAxis" xlink:to="RiskNondiversifiedStatusMember" order="5.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_RiskMoneyMarketFundPriceFluctuatesMember" xlink:label="RiskMoneyMarketFundPriceFluctuatesMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="RiskAxis" xlink:to="RiskMoneyMarketFundPriceFluctuatesMember" order="6.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_RiskMoneyMarketFundMayImposeFeesOrSuspendSalesMember" xlink:label="RiskMoneyMarketFundMayImposeFeesOrSuspendSalesMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="RiskAxis" xlink:to="RiskMoneyMarketFundMayImposeFeesOrSuspendSalesMember" order="7.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_RiskMoneyMarketFundMayNotPreserveDollarMember" xlink:label="RiskMoneyMarketFundMayNotPreserveDollarMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="RiskAxis" xlink:to="RiskMoneyMarketFundMayNotPreserveDollarMember" order="8.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_RiskMoneyMarketFundSponsorMayNotProvideSupportMember" xlink:label="RiskMoneyMarketFundSponsorMayNotProvideSupportMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="RiskAxis" xlink:to="RiskMoneyMarketFundSponsorMayNotProvideSupportMember" order="9.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_RisksAbstract" xlink:label="RisksAbstract" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="RisksAbstract" xlink:to="ProspectusTable" use="optional" order="1.0" priority="1" />
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/12/role/InvestmentStrategy" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:link="http://www.xbrl.org/2003/linkbase">
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_FormN1aAbstract" xlink:label="FormN1aAbstract" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusTable" xlink:label="ProspectusTable" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="FormN1aAbstract" xlink:to="ProspectusTable" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="DocumentInformationDocumentAxis" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentDomain" xlink:label="DocumentDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="DocumentInformationDocumentAxis" xlink:to="DocumentDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="CoregistrantAxis" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AllCoregistrantsMember" xlink:label="AllCoregistrantsMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="CoregistrantAxis" xlink:to="AllCoregistrantsMember" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="LegalEntityAxis" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityDomain" xlink:label="EntityDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="EntityDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusLineItems" xlink:label="ProspectusLineItems" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ProspectusLineItems" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_StrategyHeading" xlink:label="StrategyHeading" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="StrategyHeading" use="optional" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_StrategyNarrativeTextBlock" xlink:label="StrategyNarrativeTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="StrategyNarrativeTextBlock" use="optional" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_StrategyPortfolioConcentration" xlink:label="StrategyPortfolioConcentration" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="StrategyPortfolioConcentration" order="3.0" priority="1" />
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/12/role/FeesAndExpenses" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:link="http://www.xbrl.org/2003/linkbase">
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_FormN1aAbstract" xlink:label="FormN1aAbstract" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusTable" xlink:label="ProspectusTable" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="FormN1aAbstract" xlink:to="ProspectusTable" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="DocumentInformationDocumentAxis" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentDomain" xlink:label="DocumentDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="DocumentInformationDocumentAxis" xlink:to="DocumentDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="CoregistrantAxis" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AllCoregistrantsMember" xlink:label="AllCoregistrantsMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="CoregistrantAxis" xlink:to="AllCoregistrantsMember" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="LegalEntityAxis" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityDomain" xlink:label="EntityDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="EntityDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusLineItems" xlink:label="ProspectusLineItems" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ProspectusLineItems" order="5.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseHeading" xlink:label="ExpenseHeading" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseHeading" use="optional" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseNarrativeTextBlock" xlink:label="ExpenseNarrativeTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseNarrativeTextBlock" use="optional" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ShareholderFeesCaption" xlink:label="ShareholderFeesCaption" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ShareholderFeesCaption" use="optional" order="11.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_OperatingExpensesCaption" xlink:label="OperatingExpensesCaption" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="OperatingExpensesCaption" use="optional" order="13.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseFootnotesTextBlock" xlink:label="ExpenseFootnotesTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseFootnotesTextBlock" use="optional" order="15.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpensesDeferredChargesTextBlock" xlink:label="ExpensesDeferredChargesTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpensesDeferredChargesTextBlock" use="optional" order="16.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpensesRangeOfExchangeFeesTextBlock" xlink:label="ExpensesRangeOfExchangeFeesTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpensesRangeOfExchangeFeesTextBlock" use="optional" order="17.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleHeading" xlink:label="ExpenseExampleHeading" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleHeading" use="optional" order="18.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleByYearHeading" xlink:label="ExpenseExampleByYearHeading" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleByYearHeading" use="optional" order="19.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleNarrativeTextBlock" xlink:label="ExpenseExampleNarrativeTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleNarrativeTextBlock" use="optional" order="20.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleByYearCaption" xlink:label="ExpenseExampleByYearCaption" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleByYearCaption" use="optional" order="21.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleNoRedemptionNarrativeTextBlock" xlink:label="ExpenseExampleNoRedemptionNarrativeTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleNoRedemptionNarrativeTextBlock" use="optional" order="23.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleNoRedemptionByYearCaption" xlink:label="ExpenseExampleNoRedemptionByYearCaption" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleNoRedemptionByYearCaption" use="optional" order="24.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleFootnotesTextBlock" xlink:label="ExpenseExampleFootnotesTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleFootnotesTextBlock" use="optional" order="26.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleClosingTextBlock" xlink:label="ExpenseExampleClosingTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleClosingTextBlock" use="optional" order="27.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PortfolioTurnoverHeading" xlink:label="PortfolioTurnoverHeading" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PortfolioTurnoverHeading" use="optional" order="28.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PortfolioTurnoverTextBlock" xlink:label="PortfolioTurnoverTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PortfolioTurnoverTextBlock" use="optional" order="29.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ShareholderFeesTableTextBlock" xlink:label="ShareholderFeesTableTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ShareholderFeesTableTextBlock" use="optional" order="12.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AnnualFundOperatingExpensesTableTextBlock" xlink:label="AnnualFundOperatingExpensesTableTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="AnnualFundOperatingExpensesTableTextBlock" use="optional" order="14.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleWithRedemptionTableTextBlock" xlink:label="ExpenseExampleWithRedemptionTableTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleWithRedemptionTableTextBlock" use="optional" order="22.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleNoRedemptionTableTextBlock" xlink:label="ExpenseExampleNoRedemptionTableTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleNoRedemptionTableTextBlock" use="optional" order="25.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PortfolioTurnoverRate" xlink:label="PortfolioTurnoverRate" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PortfolioTurnoverRate" order="30.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseBreakpointDiscounts" xlink:label="ExpenseBreakpointDiscounts" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseBreakpointDiscounts" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpensesOtherExpensesHadExtraordinaryExpensesBeenIncluded" xlink:label="ExpensesOtherExpensesHadExtraordinaryExpensesBeenIncluded" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpensesOtherExpensesHadExtraordinaryExpensesBeenIncluded" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpensesRestatedToReflectCurrent" xlink:label="ExpensesRestatedToReflectCurrent" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpensesRestatedToReflectCurrent" order="5.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseBreakpointMinimumInvestmentRequiredAmount" xlink:label="ExpenseBreakpointMinimumInvestmentRequiredAmount" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseBreakpointMinimumInvestmentRequiredAmount" order="6.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_OtherExpensesNewFundBasedOnEstimates" xlink:label="OtherExpensesNewFundBasedOnEstimates" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="OtherExpensesNewFundBasedOnEstimates" order="7.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AcquiredFundFeesAndExpensesBasedOnEstimates" xlink:label="AcquiredFundFeesAndExpensesBasedOnEstimates" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="AcquiredFundFeesAndExpensesBasedOnEstimates" order="8.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpensesNotCorrelatedToRatioDueToAcquiredFundFees" xlink:label="ExpensesNotCorrelatedToRatioDueToAcquiredFundFees" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpensesNotCorrelatedToRatioDueToAcquiredFundFees" order="9.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpensesExplanationOfNonrecurringAccountFee" xlink:label="ExpensesExplanationOfNonrecurringAccountFee" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpensesExplanationOfNonrecurringAccountFee" order="10.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ClassAxis" xlink:label="ClassAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ClassAxis" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ShareClassDomain" xlink:label="ShareClassDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="ShareClassDomain" order="1.0" priority="1" />
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/12/role/N1aSupplement" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:link="http://www.xbrl.org/2003/linkbase">
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_FormN1aAbstract" xlink:label="FormN1aAbstract" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusTable" xlink:label="ProspectusTable" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="FormN1aAbstract" xlink:to="ProspectusTable" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="DocumentInformationDocumentAxis" use="optional" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentDomain" xlink:label="DocumentDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="DocumentInformationDocumentAxis" xlink:to="DocumentDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="CoregistrantAxis" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AllCoregistrantsMember" xlink:label="AllCoregistrantsMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="CoregistrantAxis" xlink:to="AllCoregistrantsMember" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="LegalEntityAxis" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityDomain" xlink:label="EntityDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="EntityDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusLineItems" xlink:label="ProspectusLineItems" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ProspectusLineItems" order="5.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_SupplementToProspectusTextBlock" xlink:label="SupplementToProspectusTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="SupplementToProspectusTextBlock" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ClassAxis" xlink:label="ClassAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ClassAxis" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ShareClassDomain" xlink:label="ShareClassDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="ShareClassDomain" order="1.0" priority="1" />
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/13/role/RiskReturn" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:link="http://www.xbrl.org/2003/linkbase">
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_FormN1aAbstract" xlink:label="FormN1aAbstract" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusTable" xlink:label="ProspectusTable" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="FormN1aAbstract" xlink:to="ProspectusTable" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="DocumentInformationDocumentAxis" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentDomain" xlink:label="DocumentDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="DocumentInformationDocumentAxis" xlink:to="DocumentDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="CoregistrantAxis" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AllCoregistrantsMember" xlink:label="AllCoregistrantsMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="CoregistrantAxis" xlink:to="AllCoregistrantsMember" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="LegalEntityAxis" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityDomain" xlink:label="EntityDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="EntityDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusLineItems" xlink:label="ProspectusLineItems" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ProspectusLineItems" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_RiskReturnHeading" xlink:label="RiskReturnHeading" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="RiskReturnHeading" use="optional" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ObjectiveHeading" xlink:label="ObjectiveHeading" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ObjectiveHeading" use="optional" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ObjectivePrimaryTextBlock" xlink:label="ObjectivePrimaryTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ObjectivePrimaryTextBlock" use="optional" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ObjectiveSecondaryTextBlock" xlink:label="ObjectiveSecondaryTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ObjectiveSecondaryTextBlock" use="optional" order="4.0" priority="1" />
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/13/role/ShareholderFeesData" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:link="http://www.xbrl.org/2003/linkbase">
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusTable" xlink:label="ProspectusTable" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="DocumentInformationDocumentAxis" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentDomain" xlink:label="DocumentDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="DocumentInformationDocumentAxis" xlink:to="DocumentDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="CoregistrantAxis" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AllCoregistrantsMember" xlink:label="AllCoregistrantsMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="CoregistrantAxis" xlink:to="AllCoregistrantsMember" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="LegalEntityAxis" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityDomain" xlink:label="EntityDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="EntityDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusLineItems" xlink:label="ProspectusLineItems" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ProspectusLineItems" order="5.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ShareholderFeesColumnName" xlink:label="ShareholderFeesColumnName" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ShareholderFeesColumnName" use="optional" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_MaximumCumulativeSalesChargeOverOfferingPrice" xlink:label="MaximumCumulativeSalesChargeOverOfferingPrice" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="MaximumCumulativeSalesChargeOverOfferingPrice" use="optional" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_MaximumCumulativeSalesChargeOverOther" xlink:label="MaximumCumulativeSalesChargeOverOther" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="MaximumCumulativeSalesChargeOverOther" use="optional" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice" xlink:label="MaximumSalesChargeImposedOnPurchasesOverOfferingPrice" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="MaximumSalesChargeImposedOnPurchasesOverOfferingPrice" use="optional" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_MaximumDeferredSalesChargeOverOfferingPrice" xlink:label="MaximumDeferredSalesChargeOverOfferingPrice" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="MaximumDeferredSalesChargeOverOfferingPrice" use="optional" order="5.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_MaximumDeferredSalesChargeOverOther" xlink:label="MaximumDeferredSalesChargeOverOther" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="MaximumDeferredSalesChargeOverOther" use="optional" order="6.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther" xlink:label="MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther" use="optional" order="7.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_RedemptionFeeOverRedemption" xlink:label="RedemptionFeeOverRedemption" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="RedemptionFeeOverRedemption" use="optional" order="8.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_RedemptionFee" xlink:label="RedemptionFee" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="RedemptionFee" use="optional" order="9.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExchangeFeeOverRedemption" xlink:label="ExchangeFeeOverRedemption" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExchangeFeeOverRedemption" use="optional" order="10.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExchangeFee" xlink:label="ExchangeFee" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExchangeFee" use="optional" order="11.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_MaximumAccountFeeOverAssets" xlink:label="MaximumAccountFeeOverAssets" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="MaximumAccountFeeOverAssets" use="optional" order="12.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_MaximumAccountFee" xlink:label="MaximumAccountFee" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="MaximumAccountFee" use="optional" order="13.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ShareholderFeeOther" xlink:label="ShareholderFeeOther" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ShareholderFeeOther" use="optional" order="14.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ClassAxis" xlink:label="ClassAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ClassAxis" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ShareClassDomain" xlink:label="ShareClassDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="ShareClassDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ShareholderFeesAbstract" xlink:label="ShareholderFeesAbstract" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ShareholderFeesAbstract" xlink:to="ProspectusTable" order="1.0" priority="1" />
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/13/role/OperatingExpensesData" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:link="http://www.xbrl.org/2003/linkbase">
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_FormN1aAbstract" xlink:label="FormN1aAbstract" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusTable" xlink:label="ProspectusTable" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="FormN1aAbstract" xlink:to="ProspectusTable" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="DocumentInformationDocumentAxis" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentDomain" xlink:label="DocumentDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="DocumentInformationDocumentAxis" xlink:to="DocumentDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="CoregistrantAxis" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AllCoregistrantsMember" xlink:label="AllCoregistrantsMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="CoregistrantAxis" xlink:to="AllCoregistrantsMember" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="LegalEntityAxis" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityDomain" xlink:label="EntityDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="EntityDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusLineItems" xlink:label="ProspectusLineItems" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ProspectusLineItems" order="5.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_OperatingExpensesColumnName" xlink:label="OperatingExpensesColumnName" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="OperatingExpensesColumnName" use="optional" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ManagementFeesOverAssets" xlink:label="ManagementFeesOverAssets" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ManagementFeesOverAssets" use="optional" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_DistributionAndService12b1FeesOverAssets" xlink:label="DistributionAndService12b1FeesOverAssets" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="DistributionAndService12b1FeesOverAssets" use="optional" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_DistributionOrSimilarNon12b1FeesOverAssets" xlink:label="DistributionOrSimilarNon12b1FeesOverAssets" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="DistributionOrSimilarNon12b1FeesOverAssets" use="optional" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_Component1OtherExpensesOverAssets" xlink:label="Component1OtherExpensesOverAssets" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="Component1OtherExpensesOverAssets" use="optional" order="5.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_Component2OtherExpensesOverAssets" xlink:label="Component2OtherExpensesOverAssets" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="Component2OtherExpensesOverAssets" use="optional" order="6.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_Component3OtherExpensesOverAssets" xlink:label="Component3OtherExpensesOverAssets" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="Component3OtherExpensesOverAssets" use="optional" order="7.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_OtherExpensesOverAssets" xlink:label="OtherExpensesOverAssets" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="OtherExpensesOverAssets" use="optional" order="8.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AcquiredFundFeesAndExpensesOverAssets" xlink:label="AcquiredFundFeesAndExpensesOverAssets" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="AcquiredFundFeesAndExpensesOverAssets" use="optional" order="9.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpensesOverAssets" xlink:label="ExpensesOverAssets" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpensesOverAssets" use="optional" order="10.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_FeeWaiverOrReimbursementOverAssets" xlink:label="FeeWaiverOrReimbursementOverAssets" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="FeeWaiverOrReimbursementOverAssets" use="optional" order="11.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_NetExpensesOverAssets" xlink:label="NetExpensesOverAssets" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="NetExpensesOverAssets" use="optional" order="12.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_FeeWaiverOrReimbursementOverAssetsDateOfTermination" xlink:label="FeeWaiverOrReimbursementOverAssetsDateOfTermination" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="FeeWaiverOrReimbursementOverAssetsDateOfTermination" order="13.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ClassAxis" xlink:label="ClassAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ClassAxis" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ShareClassDomain" xlink:label="ShareClassDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="ShareClassDomain" order="1.0" priority="1" />
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/13/role/ExpenseExample" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:link="http://www.xbrl.org/2003/linkbase">
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusTable" xlink:label="ProspectusTable" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="DocumentInformationDocumentAxis" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentDomain" xlink:label="DocumentDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="DocumentInformationDocumentAxis" xlink:to="DocumentDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="CoregistrantAxis" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AllCoregistrantsMember" xlink:label="AllCoregistrantsMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="CoregistrantAxis" xlink:to="AllCoregistrantsMember" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="LegalEntityAxis" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityDomain" xlink:label="EntityDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="EntityDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusLineItems" xlink:label="ProspectusLineItems" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ProspectusLineItems" order="5.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleByYearColumnName" xlink:label="ExpenseExampleByYearColumnName" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleByYearColumnName" use="optional" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleYear01" xlink:label="ExpenseExampleYear01" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleYear01" use="optional" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleYear03" xlink:label="ExpenseExampleYear03" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleYear03" use="optional" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleYear05" xlink:label="ExpenseExampleYear05" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleYear05" use="optional" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleYear10" xlink:label="ExpenseExampleYear10" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleYear10" use="optional" order="5.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ClassAxis" xlink:label="ClassAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ClassAxis" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ShareClassDomain" xlink:label="ShareClassDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="ShareClassDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleAbstract" xlink:label="ExpenseExampleAbstract" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ExpenseExampleAbstract" xlink:to="ProspectusTable" order="1.0" priority="1" />
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/13/role/ExpenseExampleNoRedemption" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:link="http://www.xbrl.org/2003/linkbase">
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusTable" xlink:label="ProspectusTable" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="DocumentInformationDocumentAxis" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentDomain" xlink:label="DocumentDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="DocumentInformationDocumentAxis" xlink:to="DocumentDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="CoregistrantAxis" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AllCoregistrantsMember" xlink:label="AllCoregistrantsMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="CoregistrantAxis" xlink:to="AllCoregistrantsMember" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="LegalEntityAxis" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityDomain" xlink:label="EntityDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="EntityDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusLineItems" xlink:label="ProspectusLineItems" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ProspectusLineItems" order="5.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleNoRedemptionByYearColumnName" xlink:label="ExpenseExampleNoRedemptionByYearColumnName" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleNoRedemptionByYearColumnName" use="optional" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleNoRedemptionYear01" xlink:label="ExpenseExampleNoRedemptionYear01" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleNoRedemptionYear01" use="optional" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleNoRedemptionYear03" xlink:label="ExpenseExampleNoRedemptionYear03" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleNoRedemptionYear03" use="optional" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleNoRedemptionYear05" xlink:label="ExpenseExampleNoRedemptionYear05" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleNoRedemptionYear05" use="optional" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleNoRedemptionYear10" xlink:label="ExpenseExampleNoRedemptionYear10" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleNoRedemptionYear10" use="optional" order="5.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ClassAxis" xlink:label="ClassAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ClassAxis" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ShareClassDomain" xlink:label="ShareClassDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="ShareClassDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleNoRedemptionAbstract" xlink:label="ExpenseExampleNoRedemptionAbstract" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ExpenseExampleNoRedemptionAbstract" xlink:to="ProspectusTable" order="1.0" priority="1" />
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/13/role/BarChartData" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:link="http://www.xbrl.org/2003/linkbase">
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusTable" xlink:label="ProspectusTable" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="DocumentInformationDocumentAxis" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentDomain" xlink:label="DocumentDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="DocumentInformationDocumentAxis" xlink:to="DocumentDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="CoregistrantAxis" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AllCoregistrantsMember" xlink:label="AllCoregistrantsMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="CoregistrantAxis" xlink:to="AllCoregistrantsMember" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="LegalEntityAxis" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityDomain" xlink:label="EntityDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="EntityDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusLineItems" xlink:label="ProspectusLineItems" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ProspectusLineItems" order="5.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AnnualReturnCaption" xlink:label="AnnualReturnCaption" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="AnnualReturnCaption" use="optional" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AnnualReturnColumnName" xlink:label="AnnualReturnColumnName" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="AnnualReturnColumnName" use="optional" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AnnualReturnInceptionDate" xlink:label="AnnualReturnInceptionDate" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="AnnualReturnInceptionDate" use="optional" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AnnlRtrPct" xlink:label="AnnlRtrPct" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="AnnlRtrPct" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ClassAxis" xlink:label="ClassAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ClassAxis" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ShareClassDomain" xlink:label="ShareClassDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="ShareClassDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_BarChartTableAbstract" xlink:label="BarChartTableAbstract" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="BarChartTableAbstract" xlink:to="ProspectusTable" order="1.0" priority="1" />
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/13/role/PerformanceTableData" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:link="http://www.xbrl.org/2003/linkbase">
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusTable" xlink:label="ProspectusTable" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="DocumentInformationDocumentAxis" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentDomain" xlink:label="DocumentDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="DocumentInformationDocumentAxis" xlink:to="DocumentDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="CoregistrantAxis" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AllCoregistrantsMember" xlink:label="AllCoregistrantsMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="CoregistrantAxis" xlink:to="AllCoregistrantsMember" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusLineItems" xlink:label="ProspectusLineItems" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ProspectusLineItems" order="5.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AverageAnnualReturnLabel" xlink:label="AverageAnnualReturnLabel" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="AverageAnnualReturnLabel" use="optional" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AvgAnnlRtrPct" xlink:label="AvgAnnlRtrPct" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="AvgAnnlRtrPct" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerfInceptionDate" xlink:label="PerfInceptionDate" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerfInceptionDate" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ClassAxis" xlink:label="ClassAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ClassAxis" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ShareClassDomain" xlink:label="ShareClassDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="ShareClassDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceMeasureAxis" xlink:label="PerformanceMeasureAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="PerformanceMeasureAxis" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceMeasureDomain" xlink:label="PerformanceMeasureDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="PerformanceMeasureAxis" xlink:to="PerformanceMeasureDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AfterTaxesOnDistributionsMember" xlink:label="AfterTaxesOnDistributionsMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="PerformanceMeasureDomain" xlink:to="AfterTaxesOnDistributionsMember" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AfterTaxesOnDistributionsAndSalesMember" xlink:label="AfterTaxesOnDistributionsAndSalesMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="PerformanceMeasureDomain" xlink:to="AfterTaxesOnDistributionsAndSalesMember" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AverageAnnualReturnAbstract" xlink:label="AverageAnnualReturnAbstract" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="AverageAnnualReturnAbstract" xlink:to="ProspectusTable" order="1.0" priority="1" />
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/13/role/N1aCover" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:link="http://www.xbrl.org/2003/linkbase">
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_FormN1aAbstract" xlink:label="FormN1aAbstract" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusTable" xlink:label="ProspectusTable" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="FormN1aAbstract" xlink:to="ProspectusTable" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="DocumentInformationDocumentAxis" use="optional" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentDomain" xlink:label="DocumentDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="DocumentInformationDocumentAxis" xlink:to="DocumentDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="CoregistrantAxis" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AllCoregistrantsMember" xlink:label="AllCoregistrantsMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="CoregistrantAxis" xlink:to="AllCoregistrantsMember" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusLineItems" xlink:label="ProspectusLineItems" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ProspectusLineItems" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentType" xlink:label="DocumentType" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="DocumentType" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_AmendmentFlag" xlink:label="AmendmentFlag" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="AmendmentFlag" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_AmendmentDescription" xlink:label="AmendmentDescription" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="AmendmentDescription" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityRegistrantName" xlink:label="EntityRegistrantName" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="EntityRegistrantName" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityCentralIndexKey" xlink:label="EntityCentralIndexKey" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="EntityCentralIndexKey" order="5.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityInvCompanyType" xlink:label="EntityInvCompanyType" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="EntityInvCompanyType" order="6.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentPeriodEndDate" xlink:label="DocumentPeriodEndDate" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="DocumentPeriodEndDate" order="7.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusDate" xlink:label="ProspectusDate" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ProspectusDate" order="8.0" priority="1" />
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/13/role/PerformanceManagement" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:link="http://www.xbrl.org/2003/linkbase">
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_FormN1aAbstract" xlink:label="FormN1aAbstract" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusTable" xlink:label="ProspectusTable" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="FormN1aAbstract" xlink:to="ProspectusTable" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="DocumentInformationDocumentAxis" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentDomain" xlink:label="DocumentDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="DocumentInformationDocumentAxis" xlink:to="DocumentDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="CoregistrantAxis" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AllCoregistrantsMember" xlink:label="AllCoregistrantsMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="CoregistrantAxis" xlink:to="AllCoregistrantsMember" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="LegalEntityAxis" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityDomain" xlink:label="EntityDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="EntityDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusLineItems" xlink:label="ProspectusLineItems" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ProspectusLineItems" order="5.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_BarChartAndPerformanceTableHeading" xlink:label="BarChartAndPerformanceTableHeading" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="BarChartAndPerformanceTableHeading" use="optional" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceNarrativeTextBlock" xlink:label="PerformanceNarrativeTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformanceNarrativeTextBlock" use="optional" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_BarChartNarrativeTextBlock" xlink:label="BarChartNarrativeTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="BarChartNarrativeTextBlock" use="optional" order="7.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_BarChartHeading" xlink:label="BarChartHeading" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="BarChartHeading" use="optional" order="11.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_BarChartFootnotesTextBlock" xlink:label="BarChartFootnotesTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="BarChartFootnotesTextBlock" use="optional" order="13.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_BarChartClosingTextBlock" xlink:label="BarChartClosingTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="BarChartClosingTextBlock" use="optional" order="14.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceTableHeading" xlink:label="PerformanceTableHeading" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformanceTableHeading" use="optional" order="24.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceTableNarrativeTextBlock" xlink:label="PerformanceTableNarrativeTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformanceTableNarrativeTextBlock" use="optional" order="25.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceTableClosingTextBlock" xlink:label="PerformanceTableClosingTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformanceTableClosingTextBlock" use="optional" order="39.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_BarChartTableTextBlock" xlink:label="BarChartTableTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="BarChartTableTextBlock" use="optional" order="12.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceTableTextBlock" xlink:label="PerformanceTableTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformanceTableTextBlock" use="optional" order="31.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_MarketIndexPerformanceTableTextBlock" xlink:label="MarketIndexPerformanceTableTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="MarketIndexPerformanceTableTextBlock" use="optional" order="34.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_MoneyMarketSevenDayYieldCaption" xlink:label="MoneyMarketSevenDayYieldCaption" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="MoneyMarketSevenDayYieldCaption" order="40.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_MoneyMarketSevenDayYieldColumnName" xlink:label="MoneyMarketSevenDayYieldColumnName" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="MoneyMarketSevenDayYieldColumnName" order="41.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_MoneyMarketSevenDayYieldPhone" xlink:label="MoneyMarketSevenDayYieldPhone" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="MoneyMarketSevenDayYieldPhone" order="42.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_MoneyMarketSevenDayYield" xlink:label="MoneyMarketSevenDayYield" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="MoneyMarketSevenDayYield" order="43.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_MoneyMarketSevenDayTaxEquivalentYield" xlink:label="MoneyMarketSevenDayTaxEquivalentYield" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="MoneyMarketSevenDayTaxEquivalentYield" order="44.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ThirtyDayYieldCaption" xlink:label="ThirtyDayYieldCaption" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ThirtyDayYieldCaption" order="45.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ThirtyDayYieldColumnName" xlink:label="ThirtyDayYieldColumnName" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ThirtyDayYieldColumnName" order="46.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ThirtyDayYieldPhone" xlink:label="ThirtyDayYieldPhone" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ThirtyDayYieldPhone" order="47.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ThirtyDayYield" xlink:label="ThirtyDayYield" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ThirtyDayYield" order="48.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ThirtyDayTaxEquivalentYield" xlink:label="ThirtyDayTaxEquivalentYield" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ThirtyDayTaxEquivalentYield" order="49.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceAvailabilityWebSiteAddress" xlink:label="PerformanceAvailabilityWebSiteAddress" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformanceAvailabilityWebSiteAddress" order="50.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceAvailabilityPhone" xlink:label="PerformanceAvailabilityPhone" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformanceAvailabilityPhone" order="51.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceTableFootnotesTextBlock" xlink:label="PerformanceTableFootnotesTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformanceTableFootnotesTextBlock" use="optional" order="35.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceTableFootnotesReasonPerformanceInformationForClassDifferentFromImmediatelyPrecedingPeriod" xlink:label="PerformanceTableFootnotesReasonPerformanceInformationForClassDifferentFromImmediatelyPrecedingPeriod" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformanceTableFootnotesReasonPerformanceInformationForClassDifferentFromImmediatelyPrecedingPeriod" order="36.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceTableOneClassOfAfterTaxShown" xlink:label="PerformanceTableOneClassOfAfterTaxShown" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformanceTableOneClassOfAfterTaxShown" order="37.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_IndexNoDeductionForFeesExpensesTaxes" xlink:label="IndexNoDeductionForFeesExpensesTaxes" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="IndexNoDeductionForFeesExpensesTaxes" order="38.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AverageAnnualReturnCaption" xlink:label="AverageAnnualReturnCaption" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="AverageAnnualReturnCaption" order="32.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AverageAnnualReturnColumnName" xlink:label="AverageAnnualReturnColumnName" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="AverageAnnualReturnColumnName" order="33.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceTableDoesReflectSalesLoads" xlink:label="PerformanceTableDoesReflectSalesLoads" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformanceTableDoesReflectSalesLoads" order="26.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceTableMarketIndexChanged" xlink:label="PerformanceTableMarketIndexChanged" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformanceTableMarketIndexChanged" order="27.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceTableUsesHighestFederalRate" xlink:label="PerformanceTableUsesHighestFederalRate" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformanceTableUsesHighestFederalRate" order="28.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceTableNotRelevantToTaxDeferred" xlink:label="PerformanceTableNotRelevantToTaxDeferred" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformanceTableNotRelevantToTaxDeferred" order="29.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceTableExplanationAfterTaxHigher" xlink:label="PerformanceTableExplanationAfterTaxHigher" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformanceTableExplanationAfterTaxHigher" order="30.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_YearToDateReturnLabel" xlink:label="YearToDateReturnLabel" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="YearToDateReturnLabel" order="15.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_BarChartYearToDateReturn" xlink:label="BarChartYearToDateReturn" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="BarChartYearToDateReturn" order="16.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_BarChartYearToDateReturnDate" xlink:label="BarChartYearToDateReturnDate" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="BarChartYearToDateReturnDate" order="17.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_HighestQuarterlyReturnLabel" xlink:label="HighestQuarterlyReturnLabel" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="HighestQuarterlyReturnLabel" order="18.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_BarChartHighestQuarterlyReturn" xlink:label="BarChartHighestQuarterlyReturn" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="BarChartHighestQuarterlyReturn" order="19.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_BarChartHighestQuarterlyReturnDate" xlink:label="BarChartHighestQuarterlyReturnDate" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="BarChartHighestQuarterlyReturnDate" order="20.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_LowestQuarterlyReturnLabel" xlink:label="LowestQuarterlyReturnLabel" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="LowestQuarterlyReturnLabel" order="21.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_BarChartLowestQuarterlyReturn" xlink:label="BarChartLowestQuarterlyReturn" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="BarChartLowestQuarterlyReturn" order="22.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_BarChartLowestQuarterlyReturnDate" xlink:label="BarChartLowestQuarterlyReturnDate" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="BarChartLowestQuarterlyReturnDate" order="23.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_BarChartDoesNotReflectSalesLoads" xlink:label="BarChartDoesNotReflectSalesLoads" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="BarChartDoesNotReflectSalesLoads" order="8.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_BarChartReturnsForClassNotOfferedInProspectus" xlink:label="BarChartReturnsForClassNotOfferedInProspectus" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="BarChartReturnsForClassNotOfferedInProspectus" order="9.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_BarChartReasonSelectedClassDifferentFromImmediatelyPrecedingPeriod" xlink:label="BarChartReasonSelectedClassDifferentFromImmediatelyPrecedingPeriod" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="BarChartReasonSelectedClassDifferentFromImmediatelyPrecedingPeriod" order="10.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformancePastDoesNotIndicateFuture" xlink:label="PerformancePastDoesNotIndicateFuture" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformancePastDoesNotIndicateFuture" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceInformationIllustratesVariabilityOfReturns" xlink:label="PerformanceInformationIllustratesVariabilityOfReturns" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformanceInformationIllustratesVariabilityOfReturns" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceOneYearOrLess" xlink:label="PerformanceOneYearOrLess" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformanceOneYearOrLess" order="5.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceAdditionalMarketIndex" xlink:label="PerformanceAdditionalMarketIndex" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformanceAdditionalMarketIndex" order="6.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ClassAxis" xlink:label="ClassAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ClassAxis" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ShareClassDomain" xlink:label="ShareClassDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="ShareClassDomain" order="1.0" priority="1" />
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/13/role/InvestmentRisks" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:link="http://www.xbrl.org/2003/linkbase">
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusTable" xlink:label="ProspectusTable" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="DocumentInformationDocumentAxis" use="optional" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentDomain" xlink:label="DocumentDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="DocumentInformationDocumentAxis" xlink:to="DocumentDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="CoregistrantAxis" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AllCoregistrantsMember" xlink:label="AllCoregistrantsMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="CoregistrantAxis" xlink:to="AllCoregistrantsMember" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="LegalEntityAxis" use="optional" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityDomain" xlink:label="EntityDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="EntityDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusLineItems" xlink:label="ProspectusLineItems" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ProspectusLineItems" order="5.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_RiskTextBlock" xlink:label="RiskTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="RiskTextBlock" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_RiskAxis" xlink:label="RiskAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="RiskAxis" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AllRisksMember" xlink:label="AllRisksMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="RiskAxis" xlink:to="AllRisksMember" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_RiskLoseMoneyMember" xlink:label="RiskLoseMoneyMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="RiskAxis" xlink:to="RiskLoseMoneyMember" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_RiskNotInsuredDepositoryInstitutionMember" xlink:label="RiskNotInsuredDepositoryInstitutionMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="RiskAxis" xlink:to="RiskNotInsuredDepositoryInstitutionMember" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_RiskNotInsuredMember" xlink:label="RiskNotInsuredMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="RiskAxis" xlink:to="RiskNotInsuredMember" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_RiskNondiversifiedStatusMember" xlink:label="RiskNondiversifiedStatusMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="RiskAxis" xlink:to="RiskNondiversifiedStatusMember" order="5.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_RiskMoneyMarketFundPriceFluctuatesMember" xlink:label="RiskMoneyMarketFundPriceFluctuatesMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="RiskAxis" xlink:to="RiskMoneyMarketFundPriceFluctuatesMember" order="6.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_RiskMoneyMarketFundMayImposeFeesOrSuspendSalesMember" xlink:label="RiskMoneyMarketFundMayImposeFeesOrSuspendSalesMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="RiskAxis" xlink:to="RiskMoneyMarketFundMayImposeFeesOrSuspendSalesMember" order="7.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_RiskMoneyMarketFundMayNotPreserveDollarMember" xlink:label="RiskMoneyMarketFundMayNotPreserveDollarMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="RiskAxis" xlink:to="RiskMoneyMarketFundMayNotPreserveDollarMember" order="8.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_RiskMoneyMarketFundSponsorMayNotProvideSupportMember" xlink:label="RiskMoneyMarketFundSponsorMayNotProvideSupportMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="RiskAxis" xlink:to="RiskMoneyMarketFundSponsorMayNotProvideSupportMember" order="9.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_RisksAbstract" xlink:label="RisksAbstract" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="RisksAbstract" xlink:to="ProspectusTable" use="optional" order="1.0" priority="1" />
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/13/role/InvestmentStrategy" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:link="http://www.xbrl.org/2003/linkbase">
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_FormN1aAbstract" xlink:label="FormN1aAbstract" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusTable" xlink:label="ProspectusTable" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="FormN1aAbstract" xlink:to="ProspectusTable" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="DocumentInformationDocumentAxis" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentDomain" xlink:label="DocumentDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="DocumentInformationDocumentAxis" xlink:to="DocumentDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="CoregistrantAxis" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AllCoregistrantsMember" xlink:label="AllCoregistrantsMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="CoregistrantAxis" xlink:to="AllCoregistrantsMember" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="LegalEntityAxis" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityDomain" xlink:label="EntityDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="EntityDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusLineItems" xlink:label="ProspectusLineItems" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ProspectusLineItems" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_StrategyHeading" xlink:label="StrategyHeading" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="StrategyHeading" use="optional" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_StrategyNarrativeTextBlock" xlink:label="StrategyNarrativeTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="StrategyNarrativeTextBlock" use="optional" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_StrategyPortfolioConcentration" xlink:label="StrategyPortfolioConcentration" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="StrategyPortfolioConcentration" order="3.0" priority="1" />
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/13/role/FeesAndExpenses" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:link="http://www.xbrl.org/2003/linkbase">
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_FormN1aAbstract" xlink:label="FormN1aAbstract" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusTable" xlink:label="ProspectusTable" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="FormN1aAbstract" xlink:to="ProspectusTable" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="DocumentInformationDocumentAxis" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentDomain" xlink:label="DocumentDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="DocumentInformationDocumentAxis" xlink:to="DocumentDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="CoregistrantAxis" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AllCoregistrantsMember" xlink:label="AllCoregistrantsMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="CoregistrantAxis" xlink:to="AllCoregistrantsMember" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="LegalEntityAxis" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityDomain" xlink:label="EntityDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="EntityDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusLineItems" xlink:label="ProspectusLineItems" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ProspectusLineItems" order="5.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseHeading" xlink:label="ExpenseHeading" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseHeading" use="optional" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseNarrativeTextBlock" xlink:label="ExpenseNarrativeTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseNarrativeTextBlock" use="optional" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ShareholderFeesCaption" xlink:label="ShareholderFeesCaption" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ShareholderFeesCaption" use="optional" order="11.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_OperatingExpensesCaption" xlink:label="OperatingExpensesCaption" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="OperatingExpensesCaption" use="optional" order="13.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseFootnotesTextBlock" xlink:label="ExpenseFootnotesTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseFootnotesTextBlock" use="optional" order="15.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpensesDeferredChargesTextBlock" xlink:label="ExpensesDeferredChargesTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpensesDeferredChargesTextBlock" use="optional" order="16.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpensesRangeOfExchangeFeesTextBlock" xlink:label="ExpensesRangeOfExchangeFeesTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpensesRangeOfExchangeFeesTextBlock" use="optional" order="17.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleHeading" xlink:label="ExpenseExampleHeading" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleHeading" use="optional" order="18.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleByYearHeading" xlink:label="ExpenseExampleByYearHeading" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleByYearHeading" use="optional" order="19.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleNarrativeTextBlock" xlink:label="ExpenseExampleNarrativeTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleNarrativeTextBlock" use="optional" order="20.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleByYearCaption" xlink:label="ExpenseExampleByYearCaption" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleByYearCaption" use="optional" order="21.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleNoRedemptionNarrativeTextBlock" xlink:label="ExpenseExampleNoRedemptionNarrativeTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleNoRedemptionNarrativeTextBlock" use="optional" order="23.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleNoRedemptionByYearCaption" xlink:label="ExpenseExampleNoRedemptionByYearCaption" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleNoRedemptionByYearCaption" use="optional" order="24.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleFootnotesTextBlock" xlink:label="ExpenseExampleFootnotesTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleFootnotesTextBlock" use="optional" order="26.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleClosingTextBlock" xlink:label="ExpenseExampleClosingTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleClosingTextBlock" use="optional" order="27.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PortfolioTurnoverHeading" xlink:label="PortfolioTurnoverHeading" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PortfolioTurnoverHeading" use="optional" order="28.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PortfolioTurnoverTextBlock" xlink:label="PortfolioTurnoverTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PortfolioTurnoverTextBlock" use="optional" order="29.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ShareholderFeesTableTextBlock" xlink:label="ShareholderFeesTableTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ShareholderFeesTableTextBlock" use="optional" order="12.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AnnualFundOperatingExpensesTableTextBlock" xlink:label="AnnualFundOperatingExpensesTableTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="AnnualFundOperatingExpensesTableTextBlock" use="optional" order="14.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleWithRedemptionTableTextBlock" xlink:label="ExpenseExampleWithRedemptionTableTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleWithRedemptionTableTextBlock" use="optional" order="22.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleNoRedemptionTableTextBlock" xlink:label="ExpenseExampleNoRedemptionTableTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleNoRedemptionTableTextBlock" use="optional" order="25.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PortfolioTurnoverRate" xlink:label="PortfolioTurnoverRate" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PortfolioTurnoverRate" order="30.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseBreakpointDiscounts" xlink:label="ExpenseBreakpointDiscounts" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseBreakpointDiscounts" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpensesOtherExpensesHadExtraordinaryExpensesBeenIncluded" xlink:label="ExpensesOtherExpensesHadExtraordinaryExpensesBeenIncluded" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpensesOtherExpensesHadExtraordinaryExpensesBeenIncluded" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpensesRestatedToReflectCurrent" xlink:label="ExpensesRestatedToReflectCurrent" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpensesRestatedToReflectCurrent" order="5.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseBreakpointMinimumInvestmentRequiredAmount" xlink:label="ExpenseBreakpointMinimumInvestmentRequiredAmount" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseBreakpointMinimumInvestmentRequiredAmount" order="6.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_OtherExpensesNewFundBasedOnEstimates" xlink:label="OtherExpensesNewFundBasedOnEstimates" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="OtherExpensesNewFundBasedOnEstimates" order="7.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AcquiredFundFeesAndExpensesBasedOnEstimates" xlink:label="AcquiredFundFeesAndExpensesBasedOnEstimates" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="AcquiredFundFeesAndExpensesBasedOnEstimates" order="8.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpensesNotCorrelatedToRatioDueToAcquiredFundFees" xlink:label="ExpensesNotCorrelatedToRatioDueToAcquiredFundFees" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpensesNotCorrelatedToRatioDueToAcquiredFundFees" order="9.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpensesExplanationOfNonrecurringAccountFee" xlink:label="ExpensesExplanationOfNonrecurringAccountFee" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpensesExplanationOfNonrecurringAccountFee" order="10.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ClassAxis" xlink:label="ClassAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ClassAxis" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ShareClassDomain" xlink:label="ShareClassDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="ShareClassDomain" order="1.0" priority="1" />
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/13/role/N1aSupplement" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:link="http://www.xbrl.org/2003/linkbase">
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_FormN1aAbstract" xlink:label="FormN1aAbstract" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusTable" xlink:label="ProspectusTable" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="FormN1aAbstract" xlink:to="ProspectusTable" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="DocumentInformationDocumentAxis" use="optional" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentDomain" xlink:label="DocumentDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="DocumentInformationDocumentAxis" xlink:to="DocumentDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="CoregistrantAxis" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AllCoregistrantsMember" xlink:label="AllCoregistrantsMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="CoregistrantAxis" xlink:to="AllCoregistrantsMember" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="LegalEntityAxis" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityDomain" xlink:label="EntityDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="EntityDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusLineItems" xlink:label="ProspectusLineItems" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ProspectusLineItems" order="5.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_SupplementToProspectusTextBlock" xlink:label="SupplementToProspectusTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="SupplementToProspectusTextBlock" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ClassAxis" xlink:label="ClassAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ClassAxis" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ShareClassDomain" xlink:label="ShareClassDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="ShareClassDomain" order="1.0" priority="1" />
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/14/role/RiskReturn" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:link="http://www.xbrl.org/2003/linkbase">
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_FormN1aAbstract" xlink:label="FormN1aAbstract" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusTable" xlink:label="ProspectusTable" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="FormN1aAbstract" xlink:to="ProspectusTable" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="DocumentInformationDocumentAxis" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentDomain" xlink:label="DocumentDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="DocumentInformationDocumentAxis" xlink:to="DocumentDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="CoregistrantAxis" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AllCoregistrantsMember" xlink:label="AllCoregistrantsMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="CoregistrantAxis" xlink:to="AllCoregistrantsMember" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="LegalEntityAxis" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityDomain" xlink:label="EntityDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="EntityDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusLineItems" xlink:label="ProspectusLineItems" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ProspectusLineItems" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_RiskReturnHeading" xlink:label="RiskReturnHeading" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="RiskReturnHeading" use="optional" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ObjectiveHeading" xlink:label="ObjectiveHeading" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ObjectiveHeading" use="optional" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ObjectivePrimaryTextBlock" xlink:label="ObjectivePrimaryTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ObjectivePrimaryTextBlock" use="optional" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ObjectiveSecondaryTextBlock" xlink:label="ObjectiveSecondaryTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ObjectiveSecondaryTextBlock" use="optional" order="4.0" priority="1" />
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/14/role/ShareholderFeesData" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:link="http://www.xbrl.org/2003/linkbase">
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusTable" xlink:label="ProspectusTable" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="DocumentInformationDocumentAxis" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentDomain" xlink:label="DocumentDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="DocumentInformationDocumentAxis" xlink:to="DocumentDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="CoregistrantAxis" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AllCoregistrantsMember" xlink:label="AllCoregistrantsMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="CoregistrantAxis" xlink:to="AllCoregistrantsMember" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="LegalEntityAxis" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityDomain" xlink:label="EntityDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="EntityDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusLineItems" xlink:label="ProspectusLineItems" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ProspectusLineItems" order="5.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ShareholderFeesColumnName" xlink:label="ShareholderFeesColumnName" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ShareholderFeesColumnName" use="optional" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_MaximumCumulativeSalesChargeOverOfferingPrice" xlink:label="MaximumCumulativeSalesChargeOverOfferingPrice" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="MaximumCumulativeSalesChargeOverOfferingPrice" use="optional" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_MaximumCumulativeSalesChargeOverOther" xlink:label="MaximumCumulativeSalesChargeOverOther" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="MaximumCumulativeSalesChargeOverOther" use="optional" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice" xlink:label="MaximumSalesChargeImposedOnPurchasesOverOfferingPrice" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="MaximumSalesChargeImposedOnPurchasesOverOfferingPrice" use="optional" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_MaximumDeferredSalesChargeOverOfferingPrice" xlink:label="MaximumDeferredSalesChargeOverOfferingPrice" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="MaximumDeferredSalesChargeOverOfferingPrice" use="optional" order="5.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_MaximumDeferredSalesChargeOverOther" xlink:label="MaximumDeferredSalesChargeOverOther" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="MaximumDeferredSalesChargeOverOther" use="optional" order="6.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther" xlink:label="MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther" use="optional" order="7.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_RedemptionFeeOverRedemption" xlink:label="RedemptionFeeOverRedemption" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="RedemptionFeeOverRedemption" use="optional" order="8.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_RedemptionFee" xlink:label="RedemptionFee" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="RedemptionFee" use="optional" order="9.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExchangeFeeOverRedemption" xlink:label="ExchangeFeeOverRedemption" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExchangeFeeOverRedemption" use="optional" order="10.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExchangeFee" xlink:label="ExchangeFee" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExchangeFee" use="optional" order="11.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_MaximumAccountFeeOverAssets" xlink:label="MaximumAccountFeeOverAssets" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="MaximumAccountFeeOverAssets" use="optional" order="12.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_MaximumAccountFee" xlink:label="MaximumAccountFee" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="MaximumAccountFee" use="optional" order="13.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ShareholderFeeOther" xlink:label="ShareholderFeeOther" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ShareholderFeeOther" use="optional" order="14.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ClassAxis" xlink:label="ClassAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ClassAxis" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ShareClassDomain" xlink:label="ShareClassDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="ShareClassDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ShareholderFeesAbstract" xlink:label="ShareholderFeesAbstract" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ShareholderFeesAbstract" xlink:to="ProspectusTable" order="1.0" priority="1" />
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/14/role/OperatingExpensesData" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:link="http://www.xbrl.org/2003/linkbase">
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_FormN1aAbstract" xlink:label="FormN1aAbstract" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusTable" xlink:label="ProspectusTable" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="FormN1aAbstract" xlink:to="ProspectusTable" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="DocumentInformationDocumentAxis" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentDomain" xlink:label="DocumentDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="DocumentInformationDocumentAxis" xlink:to="DocumentDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="CoregistrantAxis" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AllCoregistrantsMember" xlink:label="AllCoregistrantsMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="CoregistrantAxis" xlink:to="AllCoregistrantsMember" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="LegalEntityAxis" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityDomain" xlink:label="EntityDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="EntityDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusLineItems" xlink:label="ProspectusLineItems" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ProspectusLineItems" order="5.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_OperatingExpensesColumnName" xlink:label="OperatingExpensesColumnName" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="OperatingExpensesColumnName" use="optional" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ManagementFeesOverAssets" xlink:label="ManagementFeesOverAssets" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ManagementFeesOverAssets" use="optional" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_DistributionAndService12b1FeesOverAssets" xlink:label="DistributionAndService12b1FeesOverAssets" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="DistributionAndService12b1FeesOverAssets" use="optional" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_DistributionOrSimilarNon12b1FeesOverAssets" xlink:label="DistributionOrSimilarNon12b1FeesOverAssets" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="DistributionOrSimilarNon12b1FeesOverAssets" use="optional" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_Component1OtherExpensesOverAssets" xlink:label="Component1OtherExpensesOverAssets" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="Component1OtherExpensesOverAssets" use="optional" order="5.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_Component2OtherExpensesOverAssets" xlink:label="Component2OtherExpensesOverAssets" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="Component2OtherExpensesOverAssets" use="optional" order="6.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_Component3OtherExpensesOverAssets" xlink:label="Component3OtherExpensesOverAssets" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="Component3OtherExpensesOverAssets" use="optional" order="7.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_OtherExpensesOverAssets" xlink:label="OtherExpensesOverAssets" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="OtherExpensesOverAssets" use="optional" order="8.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AcquiredFundFeesAndExpensesOverAssets" xlink:label="AcquiredFundFeesAndExpensesOverAssets" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="AcquiredFundFeesAndExpensesOverAssets" use="optional" order="9.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpensesOverAssets" xlink:label="ExpensesOverAssets" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpensesOverAssets" use="optional" order="10.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_FeeWaiverOrReimbursementOverAssets" xlink:label="FeeWaiverOrReimbursementOverAssets" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="FeeWaiverOrReimbursementOverAssets" use="optional" order="11.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_NetExpensesOverAssets" xlink:label="NetExpensesOverAssets" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="NetExpensesOverAssets" use="optional" order="12.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_FeeWaiverOrReimbursementOverAssetsDateOfTermination" xlink:label="FeeWaiverOrReimbursementOverAssetsDateOfTermination" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="FeeWaiverOrReimbursementOverAssetsDateOfTermination" order="13.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ClassAxis" xlink:label="ClassAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ClassAxis" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ShareClassDomain" xlink:label="ShareClassDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="ShareClassDomain" order="1.0" priority="1" />
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/14/role/ExpenseExample" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:link="http://www.xbrl.org/2003/linkbase">
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusTable" xlink:label="ProspectusTable" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="DocumentInformationDocumentAxis" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentDomain" xlink:label="DocumentDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="DocumentInformationDocumentAxis" xlink:to="DocumentDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="CoregistrantAxis" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AllCoregistrantsMember" xlink:label="AllCoregistrantsMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="CoregistrantAxis" xlink:to="AllCoregistrantsMember" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="LegalEntityAxis" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityDomain" xlink:label="EntityDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="EntityDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusLineItems" xlink:label="ProspectusLineItems" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ProspectusLineItems" order="5.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleByYearColumnName" xlink:label="ExpenseExampleByYearColumnName" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleByYearColumnName" use="optional" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleYear01" xlink:label="ExpenseExampleYear01" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleYear01" use="optional" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleYear03" xlink:label="ExpenseExampleYear03" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleYear03" use="optional" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleYear05" xlink:label="ExpenseExampleYear05" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleYear05" use="optional" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleYear10" xlink:label="ExpenseExampleYear10" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleYear10" use="optional" order="5.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ClassAxis" xlink:label="ClassAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ClassAxis" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ShareClassDomain" xlink:label="ShareClassDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="ShareClassDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleAbstract" xlink:label="ExpenseExampleAbstract" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ExpenseExampleAbstract" xlink:to="ProspectusTable" order="1.0" priority="1" />
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/14/role/ExpenseExampleNoRedemption" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:link="http://www.xbrl.org/2003/linkbase">
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusTable" xlink:label="ProspectusTable" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="DocumentInformationDocumentAxis" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentDomain" xlink:label="DocumentDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="DocumentInformationDocumentAxis" xlink:to="DocumentDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="CoregistrantAxis" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AllCoregistrantsMember" xlink:label="AllCoregistrantsMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="CoregistrantAxis" xlink:to="AllCoregistrantsMember" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="LegalEntityAxis" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityDomain" xlink:label="EntityDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="EntityDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusLineItems" xlink:label="ProspectusLineItems" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ProspectusLineItems" order="5.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleNoRedemptionByYearColumnName" xlink:label="ExpenseExampleNoRedemptionByYearColumnName" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleNoRedemptionByYearColumnName" use="optional" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleNoRedemptionYear01" xlink:label="ExpenseExampleNoRedemptionYear01" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleNoRedemptionYear01" use="optional" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleNoRedemptionYear03" xlink:label="ExpenseExampleNoRedemptionYear03" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleNoRedemptionYear03" use="optional" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleNoRedemptionYear05" xlink:label="ExpenseExampleNoRedemptionYear05" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleNoRedemptionYear05" use="optional" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleNoRedemptionYear10" xlink:label="ExpenseExampleNoRedemptionYear10" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleNoRedemptionYear10" use="optional" order="5.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ClassAxis" xlink:label="ClassAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ClassAxis" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ShareClassDomain" xlink:label="ShareClassDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="ShareClassDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleNoRedemptionAbstract" xlink:label="ExpenseExampleNoRedemptionAbstract" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ExpenseExampleNoRedemptionAbstract" xlink:to="ProspectusTable" order="1.0" priority="1" />
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/14/role/BarChartData" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:link="http://www.xbrl.org/2003/linkbase">
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusTable" xlink:label="ProspectusTable" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="DocumentInformationDocumentAxis" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentDomain" xlink:label="DocumentDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="DocumentInformationDocumentAxis" xlink:to="DocumentDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="CoregistrantAxis" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AllCoregistrantsMember" xlink:label="AllCoregistrantsMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="CoregistrantAxis" xlink:to="AllCoregistrantsMember" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="LegalEntityAxis" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityDomain" xlink:label="EntityDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="EntityDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusLineItems" xlink:label="ProspectusLineItems" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ProspectusLineItems" order="5.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AnnualReturnCaption" xlink:label="AnnualReturnCaption" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="AnnualReturnCaption" use="optional" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AnnualReturnColumnName" xlink:label="AnnualReturnColumnName" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="AnnualReturnColumnName" use="optional" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AnnualReturnInceptionDate" xlink:label="AnnualReturnInceptionDate" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="AnnualReturnInceptionDate" use="optional" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AnnlRtrPct" xlink:label="AnnlRtrPct" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="AnnlRtrPct" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ClassAxis" xlink:label="ClassAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ClassAxis" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ShareClassDomain" xlink:label="ShareClassDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="ShareClassDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_BarChartTableAbstract" xlink:label="BarChartTableAbstract" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="BarChartTableAbstract" xlink:to="ProspectusTable" order="1.0" priority="1" />
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/14/role/PerformanceTableData" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:link="http://www.xbrl.org/2003/linkbase">
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusTable" xlink:label="ProspectusTable" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="DocumentInformationDocumentAxis" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentDomain" xlink:label="DocumentDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="DocumentInformationDocumentAxis" xlink:to="DocumentDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="CoregistrantAxis" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AllCoregistrantsMember" xlink:label="AllCoregistrantsMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="CoregistrantAxis" xlink:to="AllCoregistrantsMember" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusLineItems" xlink:label="ProspectusLineItems" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ProspectusLineItems" order="5.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AverageAnnualReturnLabel" xlink:label="AverageAnnualReturnLabel" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="AverageAnnualReturnLabel" use="optional" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AvgAnnlRtrPct" xlink:label="AvgAnnlRtrPct" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="AvgAnnlRtrPct" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerfInceptionDate" xlink:label="PerfInceptionDate" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerfInceptionDate" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ClassAxis" xlink:label="ClassAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ClassAxis" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ShareClassDomain" xlink:label="ShareClassDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="ShareClassDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceMeasureAxis" xlink:label="PerformanceMeasureAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="PerformanceMeasureAxis" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceMeasureDomain" xlink:label="PerformanceMeasureDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="PerformanceMeasureAxis" xlink:to="PerformanceMeasureDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AfterTaxesOnDistributionsMember" xlink:label="AfterTaxesOnDistributionsMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="PerformanceMeasureDomain" xlink:to="AfterTaxesOnDistributionsMember" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AfterTaxesOnDistributionsAndSalesMember" xlink:label="AfterTaxesOnDistributionsAndSalesMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="PerformanceMeasureDomain" xlink:to="AfterTaxesOnDistributionsAndSalesMember" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AverageAnnualReturnAbstract" xlink:label="AverageAnnualReturnAbstract" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="AverageAnnualReturnAbstract" xlink:to="ProspectusTable" order="1.0" priority="1" />
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/14/role/N1aCover" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:link="http://www.xbrl.org/2003/linkbase">
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_FormN1aAbstract" xlink:label="FormN1aAbstract" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusTable" xlink:label="ProspectusTable" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="FormN1aAbstract" xlink:to="ProspectusTable" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="DocumentInformationDocumentAxis" use="optional" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentDomain" xlink:label="DocumentDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="DocumentInformationDocumentAxis" xlink:to="DocumentDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="CoregistrantAxis" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AllCoregistrantsMember" xlink:label="AllCoregistrantsMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="CoregistrantAxis" xlink:to="AllCoregistrantsMember" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusLineItems" xlink:label="ProspectusLineItems" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ProspectusLineItems" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentType" xlink:label="DocumentType" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="DocumentType" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_AmendmentFlag" xlink:label="AmendmentFlag" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="AmendmentFlag" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_AmendmentDescription" xlink:label="AmendmentDescription" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="AmendmentDescription" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityRegistrantName" xlink:label="EntityRegistrantName" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="EntityRegistrantName" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityCentralIndexKey" xlink:label="EntityCentralIndexKey" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="EntityCentralIndexKey" order="5.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityInvCompanyType" xlink:label="EntityInvCompanyType" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="EntityInvCompanyType" order="6.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentPeriodEndDate" xlink:label="DocumentPeriodEndDate" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="DocumentPeriodEndDate" order="7.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusDate" xlink:label="ProspectusDate" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ProspectusDate" order="8.0" priority="1" />
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/14/role/PerformanceManagement" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:link="http://www.xbrl.org/2003/linkbase">
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_FormN1aAbstract" xlink:label="FormN1aAbstract" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusTable" xlink:label="ProspectusTable" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="FormN1aAbstract" xlink:to="ProspectusTable" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="DocumentInformationDocumentAxis" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentDomain" xlink:label="DocumentDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="DocumentInformationDocumentAxis" xlink:to="DocumentDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="CoregistrantAxis" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AllCoregistrantsMember" xlink:label="AllCoregistrantsMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="CoregistrantAxis" xlink:to="AllCoregistrantsMember" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="LegalEntityAxis" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityDomain" xlink:label="EntityDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="EntityDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusLineItems" xlink:label="ProspectusLineItems" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ProspectusLineItems" order="5.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_BarChartAndPerformanceTableHeading" xlink:label="BarChartAndPerformanceTableHeading" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="BarChartAndPerformanceTableHeading" use="optional" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceNarrativeTextBlock" xlink:label="PerformanceNarrativeTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformanceNarrativeTextBlock" use="optional" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_BarChartNarrativeTextBlock" xlink:label="BarChartNarrativeTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="BarChartNarrativeTextBlock" use="optional" order="7.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_BarChartHeading" xlink:label="BarChartHeading" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="BarChartHeading" use="optional" order="11.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_BarChartFootnotesTextBlock" xlink:label="BarChartFootnotesTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="BarChartFootnotesTextBlock" use="optional" order="13.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_BarChartClosingTextBlock" xlink:label="BarChartClosingTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="BarChartClosingTextBlock" use="optional" order="14.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceTableHeading" xlink:label="PerformanceTableHeading" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformanceTableHeading" use="optional" order="24.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceTableNarrativeTextBlock" xlink:label="PerformanceTableNarrativeTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformanceTableNarrativeTextBlock" use="optional" order="25.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceTableClosingTextBlock" xlink:label="PerformanceTableClosingTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformanceTableClosingTextBlock" use="optional" order="39.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_BarChartTableTextBlock" xlink:label="BarChartTableTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="BarChartTableTextBlock" use="optional" order="12.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceTableTextBlock" xlink:label="PerformanceTableTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformanceTableTextBlock" use="optional" order="31.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_MarketIndexPerformanceTableTextBlock" xlink:label="MarketIndexPerformanceTableTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="MarketIndexPerformanceTableTextBlock" use="optional" order="34.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_MoneyMarketSevenDayYieldCaption" xlink:label="MoneyMarketSevenDayYieldCaption" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="MoneyMarketSevenDayYieldCaption" order="40.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_MoneyMarketSevenDayYieldColumnName" xlink:label="MoneyMarketSevenDayYieldColumnName" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="MoneyMarketSevenDayYieldColumnName" order="41.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_MoneyMarketSevenDayYieldPhone" xlink:label="MoneyMarketSevenDayYieldPhone" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="MoneyMarketSevenDayYieldPhone" order="42.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_MoneyMarketSevenDayYield" xlink:label="MoneyMarketSevenDayYield" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="MoneyMarketSevenDayYield" order="43.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_MoneyMarketSevenDayTaxEquivalentYield" xlink:label="MoneyMarketSevenDayTaxEquivalentYield" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="MoneyMarketSevenDayTaxEquivalentYield" order="44.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ThirtyDayYieldCaption" xlink:label="ThirtyDayYieldCaption" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ThirtyDayYieldCaption" order="45.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ThirtyDayYieldColumnName" xlink:label="ThirtyDayYieldColumnName" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ThirtyDayYieldColumnName" order="46.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ThirtyDayYieldPhone" xlink:label="ThirtyDayYieldPhone" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ThirtyDayYieldPhone" order="47.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ThirtyDayYield" xlink:label="ThirtyDayYield" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ThirtyDayYield" order="48.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ThirtyDayTaxEquivalentYield" xlink:label="ThirtyDayTaxEquivalentYield" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ThirtyDayTaxEquivalentYield" order="49.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceAvailabilityWebSiteAddress" xlink:label="PerformanceAvailabilityWebSiteAddress" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformanceAvailabilityWebSiteAddress" order="50.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceAvailabilityPhone" xlink:label="PerformanceAvailabilityPhone" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformanceAvailabilityPhone" order="51.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceTableFootnotesTextBlock" xlink:label="PerformanceTableFootnotesTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformanceTableFootnotesTextBlock" use="optional" order="35.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceTableFootnotesReasonPerformanceInformationForClassDifferentFromImmediatelyPrecedingPeriod" xlink:label="PerformanceTableFootnotesReasonPerformanceInformationForClassDifferentFromImmediatelyPrecedingPeriod" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformanceTableFootnotesReasonPerformanceInformationForClassDifferentFromImmediatelyPrecedingPeriod" order="36.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceTableOneClassOfAfterTaxShown" xlink:label="PerformanceTableOneClassOfAfterTaxShown" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformanceTableOneClassOfAfterTaxShown" order="37.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_IndexNoDeductionForFeesExpensesTaxes" xlink:label="IndexNoDeductionForFeesExpensesTaxes" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="IndexNoDeductionForFeesExpensesTaxes" order="38.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AverageAnnualReturnCaption" xlink:label="AverageAnnualReturnCaption" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="AverageAnnualReturnCaption" order="32.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AverageAnnualReturnColumnName" xlink:label="AverageAnnualReturnColumnName" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="AverageAnnualReturnColumnName" order="33.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceTableDoesReflectSalesLoads" xlink:label="PerformanceTableDoesReflectSalesLoads" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformanceTableDoesReflectSalesLoads" order="26.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceTableMarketIndexChanged" xlink:label="PerformanceTableMarketIndexChanged" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformanceTableMarketIndexChanged" order="27.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceTableUsesHighestFederalRate" xlink:label="PerformanceTableUsesHighestFederalRate" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformanceTableUsesHighestFederalRate" order="28.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceTableNotRelevantToTaxDeferred" xlink:label="PerformanceTableNotRelevantToTaxDeferred" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformanceTableNotRelevantToTaxDeferred" order="29.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceTableExplanationAfterTaxHigher" xlink:label="PerformanceTableExplanationAfterTaxHigher" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformanceTableExplanationAfterTaxHigher" order="30.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_YearToDateReturnLabel" xlink:label="YearToDateReturnLabel" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="YearToDateReturnLabel" order="15.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_BarChartYearToDateReturn" xlink:label="BarChartYearToDateReturn" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="BarChartYearToDateReturn" order="16.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_BarChartYearToDateReturnDate" xlink:label="BarChartYearToDateReturnDate" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="BarChartYearToDateReturnDate" order="17.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_HighestQuarterlyReturnLabel" xlink:label="HighestQuarterlyReturnLabel" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="HighestQuarterlyReturnLabel" order="18.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_BarChartHighestQuarterlyReturn" xlink:label="BarChartHighestQuarterlyReturn" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="BarChartHighestQuarterlyReturn" order="19.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_BarChartHighestQuarterlyReturnDate" xlink:label="BarChartHighestQuarterlyReturnDate" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="BarChartHighestQuarterlyReturnDate" order="20.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_LowestQuarterlyReturnLabel" xlink:label="LowestQuarterlyReturnLabel" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="LowestQuarterlyReturnLabel" order="21.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_BarChartLowestQuarterlyReturn" xlink:label="BarChartLowestQuarterlyReturn" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="BarChartLowestQuarterlyReturn" order="22.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_BarChartLowestQuarterlyReturnDate" xlink:label="BarChartLowestQuarterlyReturnDate" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="BarChartLowestQuarterlyReturnDate" order="23.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_BarChartDoesNotReflectSalesLoads" xlink:label="BarChartDoesNotReflectSalesLoads" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="BarChartDoesNotReflectSalesLoads" order="8.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_BarChartReturnsForClassNotOfferedInProspectus" xlink:label="BarChartReturnsForClassNotOfferedInProspectus" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="BarChartReturnsForClassNotOfferedInProspectus" order="9.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_BarChartReasonSelectedClassDifferentFromImmediatelyPrecedingPeriod" xlink:label="BarChartReasonSelectedClassDifferentFromImmediatelyPrecedingPeriod" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="BarChartReasonSelectedClassDifferentFromImmediatelyPrecedingPeriod" order="10.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformancePastDoesNotIndicateFuture" xlink:label="PerformancePastDoesNotIndicateFuture" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformancePastDoesNotIndicateFuture" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceInformationIllustratesVariabilityOfReturns" xlink:label="PerformanceInformationIllustratesVariabilityOfReturns" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformanceInformationIllustratesVariabilityOfReturns" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceOneYearOrLess" xlink:label="PerformanceOneYearOrLess" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformanceOneYearOrLess" order="5.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceAdditionalMarketIndex" xlink:label="PerformanceAdditionalMarketIndex" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformanceAdditionalMarketIndex" order="6.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ClassAxis" xlink:label="ClassAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ClassAxis" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ShareClassDomain" xlink:label="ShareClassDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="ShareClassDomain" order="1.0" priority="1" />
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/14/role/InvestmentRisks" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:link="http://www.xbrl.org/2003/linkbase">
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusTable" xlink:label="ProspectusTable" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="DocumentInformationDocumentAxis" use="optional" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentDomain" xlink:label="DocumentDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="DocumentInformationDocumentAxis" xlink:to="DocumentDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="CoregistrantAxis" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AllCoregistrantsMember" xlink:label="AllCoregistrantsMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="CoregistrantAxis" xlink:to="AllCoregistrantsMember" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="LegalEntityAxis" use="optional" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityDomain" xlink:label="EntityDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="EntityDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusLineItems" xlink:label="ProspectusLineItems" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ProspectusLineItems" order="5.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_RiskTextBlock" xlink:label="RiskTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="RiskTextBlock" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_RiskAxis" xlink:label="RiskAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="RiskAxis" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AllRisksMember" xlink:label="AllRisksMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="RiskAxis" xlink:to="AllRisksMember" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_RiskLoseMoneyMember" xlink:label="RiskLoseMoneyMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="RiskAxis" xlink:to="RiskLoseMoneyMember" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_RiskNotInsuredDepositoryInstitutionMember" xlink:label="RiskNotInsuredDepositoryInstitutionMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="RiskAxis" xlink:to="RiskNotInsuredDepositoryInstitutionMember" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_RiskNotInsuredMember" xlink:label="RiskNotInsuredMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="RiskAxis" xlink:to="RiskNotInsuredMember" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_RiskNondiversifiedStatusMember" xlink:label="RiskNondiversifiedStatusMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="RiskAxis" xlink:to="RiskNondiversifiedStatusMember" order="5.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_RiskMoneyMarketFundPriceFluctuatesMember" xlink:label="RiskMoneyMarketFundPriceFluctuatesMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="RiskAxis" xlink:to="RiskMoneyMarketFundPriceFluctuatesMember" order="6.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_RiskMoneyMarketFundMayImposeFeesOrSuspendSalesMember" xlink:label="RiskMoneyMarketFundMayImposeFeesOrSuspendSalesMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="RiskAxis" xlink:to="RiskMoneyMarketFundMayImposeFeesOrSuspendSalesMember" order="7.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_RiskMoneyMarketFundMayNotPreserveDollarMember" xlink:label="RiskMoneyMarketFundMayNotPreserveDollarMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="RiskAxis" xlink:to="RiskMoneyMarketFundMayNotPreserveDollarMember" order="8.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_RiskMoneyMarketFundSponsorMayNotProvideSupportMember" xlink:label="RiskMoneyMarketFundSponsorMayNotProvideSupportMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="RiskAxis" xlink:to="RiskMoneyMarketFundSponsorMayNotProvideSupportMember" order="9.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_RisksAbstract" xlink:label="RisksAbstract" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="RisksAbstract" xlink:to="ProspectusTable" use="optional" order="1.0" priority="1" />
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/14/role/InvestmentStrategy" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:link="http://www.xbrl.org/2003/linkbase">
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_FormN1aAbstract" xlink:label="FormN1aAbstract" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusTable" xlink:label="ProspectusTable" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="FormN1aAbstract" xlink:to="ProspectusTable" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="DocumentInformationDocumentAxis" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentDomain" xlink:label="DocumentDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="DocumentInformationDocumentAxis" xlink:to="DocumentDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="CoregistrantAxis" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AllCoregistrantsMember" xlink:label="AllCoregistrantsMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="CoregistrantAxis" xlink:to="AllCoregistrantsMember" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="LegalEntityAxis" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityDomain" xlink:label="EntityDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="EntityDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusLineItems" xlink:label="ProspectusLineItems" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ProspectusLineItems" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_StrategyHeading" xlink:label="StrategyHeading" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="StrategyHeading" use="optional" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_StrategyNarrativeTextBlock" xlink:label="StrategyNarrativeTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="StrategyNarrativeTextBlock" use="optional" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_StrategyPortfolioConcentration" xlink:label="StrategyPortfolioConcentration" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="StrategyPortfolioConcentration" order="3.0" priority="1" />
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/14/role/FeesAndExpenses" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:link="http://www.xbrl.org/2003/linkbase">
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_FormN1aAbstract" xlink:label="FormN1aAbstract" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusTable" xlink:label="ProspectusTable" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="FormN1aAbstract" xlink:to="ProspectusTable" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="DocumentInformationDocumentAxis" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentDomain" xlink:label="DocumentDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="DocumentInformationDocumentAxis" xlink:to="DocumentDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="CoregistrantAxis" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AllCoregistrantsMember" xlink:label="AllCoregistrantsMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="CoregistrantAxis" xlink:to="AllCoregistrantsMember" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="LegalEntityAxis" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityDomain" xlink:label="EntityDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="EntityDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusLineItems" xlink:label="ProspectusLineItems" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ProspectusLineItems" order="5.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseHeading" xlink:label="ExpenseHeading" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseHeading" use="optional" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseNarrativeTextBlock" xlink:label="ExpenseNarrativeTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseNarrativeTextBlock" use="optional" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ShareholderFeesCaption" xlink:label="ShareholderFeesCaption" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ShareholderFeesCaption" use="optional" order="11.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_OperatingExpensesCaption" xlink:label="OperatingExpensesCaption" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="OperatingExpensesCaption" use="optional" order="13.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseFootnotesTextBlock" xlink:label="ExpenseFootnotesTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseFootnotesTextBlock" use="optional" order="15.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpensesDeferredChargesTextBlock" xlink:label="ExpensesDeferredChargesTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpensesDeferredChargesTextBlock" use="optional" order="16.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpensesRangeOfExchangeFeesTextBlock" xlink:label="ExpensesRangeOfExchangeFeesTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpensesRangeOfExchangeFeesTextBlock" use="optional" order="17.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleHeading" xlink:label="ExpenseExampleHeading" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleHeading" use="optional" order="18.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleByYearHeading" xlink:label="ExpenseExampleByYearHeading" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleByYearHeading" use="optional" order="19.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleNarrativeTextBlock" xlink:label="ExpenseExampleNarrativeTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleNarrativeTextBlock" use="optional" order="20.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleByYearCaption" xlink:label="ExpenseExampleByYearCaption" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleByYearCaption" use="optional" order="21.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleNoRedemptionNarrativeTextBlock" xlink:label="ExpenseExampleNoRedemptionNarrativeTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleNoRedemptionNarrativeTextBlock" use="optional" order="23.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleNoRedemptionByYearCaption" xlink:label="ExpenseExampleNoRedemptionByYearCaption" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleNoRedemptionByYearCaption" use="optional" order="24.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleFootnotesTextBlock" xlink:label="ExpenseExampleFootnotesTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleFootnotesTextBlock" use="optional" order="26.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleClosingTextBlock" xlink:label="ExpenseExampleClosingTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleClosingTextBlock" use="optional" order="27.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PortfolioTurnoverHeading" xlink:label="PortfolioTurnoverHeading" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PortfolioTurnoverHeading" use="optional" order="28.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PortfolioTurnoverTextBlock" xlink:label="PortfolioTurnoverTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PortfolioTurnoverTextBlock" use="optional" order="29.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ShareholderFeesTableTextBlock" xlink:label="ShareholderFeesTableTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ShareholderFeesTableTextBlock" use="optional" order="12.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AnnualFundOperatingExpensesTableTextBlock" xlink:label="AnnualFundOperatingExpensesTableTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="AnnualFundOperatingExpensesTableTextBlock" use="optional" order="14.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleWithRedemptionTableTextBlock" xlink:label="ExpenseExampleWithRedemptionTableTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleWithRedemptionTableTextBlock" use="optional" order="22.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleNoRedemptionTableTextBlock" xlink:label="ExpenseExampleNoRedemptionTableTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleNoRedemptionTableTextBlock" use="optional" order="25.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PortfolioTurnoverRate" xlink:label="PortfolioTurnoverRate" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PortfolioTurnoverRate" order="30.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseBreakpointDiscounts" xlink:label="ExpenseBreakpointDiscounts" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseBreakpointDiscounts" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpensesOtherExpensesHadExtraordinaryExpensesBeenIncluded" xlink:label="ExpensesOtherExpensesHadExtraordinaryExpensesBeenIncluded" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpensesOtherExpensesHadExtraordinaryExpensesBeenIncluded" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpensesRestatedToReflectCurrent" xlink:label="ExpensesRestatedToReflectCurrent" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpensesRestatedToReflectCurrent" order="5.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseBreakpointMinimumInvestmentRequiredAmount" xlink:label="ExpenseBreakpointMinimumInvestmentRequiredAmount" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseBreakpointMinimumInvestmentRequiredAmount" order="6.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_OtherExpensesNewFundBasedOnEstimates" xlink:label="OtherExpensesNewFundBasedOnEstimates" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="OtherExpensesNewFundBasedOnEstimates" order="7.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AcquiredFundFeesAndExpensesBasedOnEstimates" xlink:label="AcquiredFundFeesAndExpensesBasedOnEstimates" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="AcquiredFundFeesAndExpensesBasedOnEstimates" order="8.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpensesNotCorrelatedToRatioDueToAcquiredFundFees" xlink:label="ExpensesNotCorrelatedToRatioDueToAcquiredFundFees" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpensesNotCorrelatedToRatioDueToAcquiredFundFees" order="9.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpensesExplanationOfNonrecurringAccountFee" xlink:label="ExpensesExplanationOfNonrecurringAccountFee" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpensesExplanationOfNonrecurringAccountFee" order="10.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ClassAxis" xlink:label="ClassAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ClassAxis" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ShareClassDomain" xlink:label="ShareClassDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="ShareClassDomain" order="1.0" priority="1" />
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/14/role/N1aSupplement" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:link="http://www.xbrl.org/2003/linkbase">
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_FormN1aAbstract" xlink:label="FormN1aAbstract" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusTable" xlink:label="ProspectusTable" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="FormN1aAbstract" xlink:to="ProspectusTable" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="DocumentInformationDocumentAxis" use="optional" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentDomain" xlink:label="DocumentDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="DocumentInformationDocumentAxis" xlink:to="DocumentDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="CoregistrantAxis" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AllCoregistrantsMember" xlink:label="AllCoregistrantsMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="CoregistrantAxis" xlink:to="AllCoregistrantsMember" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="LegalEntityAxis" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityDomain" xlink:label="EntityDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="EntityDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusLineItems" xlink:label="ProspectusLineItems" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ProspectusLineItems" order="5.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_SupplementToProspectusTextBlock" xlink:label="SupplementToProspectusTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="SupplementToProspectusTextBlock" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ClassAxis" xlink:label="ClassAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ClassAxis" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ShareClassDomain" xlink:label="ShareClassDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="ShareClassDomain" order="1.0" priority="1" />
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/15/role/RiskReturn" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:link="http://www.xbrl.org/2003/linkbase">
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_FormN1aAbstract" xlink:label="FormN1aAbstract" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusTable" xlink:label="ProspectusTable" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="FormN1aAbstract" xlink:to="ProspectusTable" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="DocumentInformationDocumentAxis" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentDomain" xlink:label="DocumentDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="DocumentInformationDocumentAxis" xlink:to="DocumentDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="CoregistrantAxis" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AllCoregistrantsMember" xlink:label="AllCoregistrantsMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="CoregistrantAxis" xlink:to="AllCoregistrantsMember" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="LegalEntityAxis" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityDomain" xlink:label="EntityDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="EntityDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusLineItems" xlink:label="ProspectusLineItems" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ProspectusLineItems" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_RiskReturnHeading" xlink:label="RiskReturnHeading" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="RiskReturnHeading" use="optional" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ObjectiveHeading" xlink:label="ObjectiveHeading" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ObjectiveHeading" use="optional" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ObjectivePrimaryTextBlock" xlink:label="ObjectivePrimaryTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ObjectivePrimaryTextBlock" use="optional" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ObjectiveSecondaryTextBlock" xlink:label="ObjectiveSecondaryTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ObjectiveSecondaryTextBlock" use="optional" order="4.0" priority="1" />
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/15/role/ShareholderFeesData" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:link="http://www.xbrl.org/2003/linkbase">
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusTable" xlink:label="ProspectusTable" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="DocumentInformationDocumentAxis" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentDomain" xlink:label="DocumentDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="DocumentInformationDocumentAxis" xlink:to="DocumentDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="CoregistrantAxis" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AllCoregistrantsMember" xlink:label="AllCoregistrantsMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="CoregistrantAxis" xlink:to="AllCoregistrantsMember" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="LegalEntityAxis" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityDomain" xlink:label="EntityDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="EntityDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusLineItems" xlink:label="ProspectusLineItems" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ProspectusLineItems" order="5.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ShareholderFeesColumnName" xlink:label="ShareholderFeesColumnName" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ShareholderFeesColumnName" use="optional" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_MaximumCumulativeSalesChargeOverOfferingPrice" xlink:label="MaximumCumulativeSalesChargeOverOfferingPrice" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="MaximumCumulativeSalesChargeOverOfferingPrice" use="optional" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_MaximumCumulativeSalesChargeOverOther" xlink:label="MaximumCumulativeSalesChargeOverOther" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="MaximumCumulativeSalesChargeOverOther" use="optional" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice" xlink:label="MaximumSalesChargeImposedOnPurchasesOverOfferingPrice" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="MaximumSalesChargeImposedOnPurchasesOverOfferingPrice" use="optional" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_MaximumDeferredSalesChargeOverOfferingPrice" xlink:label="MaximumDeferredSalesChargeOverOfferingPrice" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="MaximumDeferredSalesChargeOverOfferingPrice" use="optional" order="5.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_MaximumDeferredSalesChargeOverOther" xlink:label="MaximumDeferredSalesChargeOverOther" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="MaximumDeferredSalesChargeOverOther" use="optional" order="6.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther" xlink:label="MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther" use="optional" order="7.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_RedemptionFeeOverRedemption" xlink:label="RedemptionFeeOverRedemption" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="RedemptionFeeOverRedemption" use="optional" order="8.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_RedemptionFee" xlink:label="RedemptionFee" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="RedemptionFee" use="optional" order="9.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExchangeFeeOverRedemption" xlink:label="ExchangeFeeOverRedemption" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExchangeFeeOverRedemption" use="optional" order="10.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExchangeFee" xlink:label="ExchangeFee" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExchangeFee" use="optional" order="11.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_MaximumAccountFeeOverAssets" xlink:label="MaximumAccountFeeOverAssets" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="MaximumAccountFeeOverAssets" use="optional" order="12.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_MaximumAccountFee" xlink:label="MaximumAccountFee" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="MaximumAccountFee" use="optional" order="13.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ShareholderFeeOther" xlink:label="ShareholderFeeOther" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ShareholderFeeOther" use="optional" order="14.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ClassAxis" xlink:label="ClassAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ClassAxis" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ShareClassDomain" xlink:label="ShareClassDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="ShareClassDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ShareholderFeesAbstract" xlink:label="ShareholderFeesAbstract" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ShareholderFeesAbstract" xlink:to="ProspectusTable" order="1.0" priority="1" />
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/15/role/OperatingExpensesData" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:link="http://www.xbrl.org/2003/linkbase">
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_FormN1aAbstract" xlink:label="FormN1aAbstract" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusTable" xlink:label="ProspectusTable" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="FormN1aAbstract" xlink:to="ProspectusTable" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="DocumentInformationDocumentAxis" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentDomain" xlink:label="DocumentDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="DocumentInformationDocumentAxis" xlink:to="DocumentDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="CoregistrantAxis" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AllCoregistrantsMember" xlink:label="AllCoregistrantsMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="CoregistrantAxis" xlink:to="AllCoregistrantsMember" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="LegalEntityAxis" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityDomain" xlink:label="EntityDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="EntityDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusLineItems" xlink:label="ProspectusLineItems" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ProspectusLineItems" order="5.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_OperatingExpensesColumnName" xlink:label="OperatingExpensesColumnName" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="OperatingExpensesColumnName" use="optional" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ManagementFeesOverAssets" xlink:label="ManagementFeesOverAssets" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ManagementFeesOverAssets" use="optional" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_DistributionAndService12b1FeesOverAssets" xlink:label="DistributionAndService12b1FeesOverAssets" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="DistributionAndService12b1FeesOverAssets" use="optional" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_DistributionOrSimilarNon12b1FeesOverAssets" xlink:label="DistributionOrSimilarNon12b1FeesOverAssets" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="DistributionOrSimilarNon12b1FeesOverAssets" use="optional" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_Component1OtherExpensesOverAssets" xlink:label="Component1OtherExpensesOverAssets" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="Component1OtherExpensesOverAssets" use="optional" order="5.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_Component2OtherExpensesOverAssets" xlink:label="Component2OtherExpensesOverAssets" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="Component2OtherExpensesOverAssets" use="optional" order="6.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_Component3OtherExpensesOverAssets" xlink:label="Component3OtherExpensesOverAssets" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="Component3OtherExpensesOverAssets" use="optional" order="7.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_OtherExpensesOverAssets" xlink:label="OtherExpensesOverAssets" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="OtherExpensesOverAssets" use="optional" order="8.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AcquiredFundFeesAndExpensesOverAssets" xlink:label="AcquiredFundFeesAndExpensesOverAssets" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="AcquiredFundFeesAndExpensesOverAssets" use="optional" order="9.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpensesOverAssets" xlink:label="ExpensesOverAssets" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpensesOverAssets" use="optional" order="10.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_FeeWaiverOrReimbursementOverAssets" xlink:label="FeeWaiverOrReimbursementOverAssets" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="FeeWaiverOrReimbursementOverAssets" use="optional" order="11.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_NetExpensesOverAssets" xlink:label="NetExpensesOverAssets" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="NetExpensesOverAssets" use="optional" order="12.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_FeeWaiverOrReimbursementOverAssetsDateOfTermination" xlink:label="FeeWaiverOrReimbursementOverAssetsDateOfTermination" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="FeeWaiverOrReimbursementOverAssetsDateOfTermination" order="13.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ClassAxis" xlink:label="ClassAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ClassAxis" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ShareClassDomain" xlink:label="ShareClassDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="ShareClassDomain" order="1.0" priority="1" />
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/15/role/ExpenseExample" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:link="http://www.xbrl.org/2003/linkbase">
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusTable" xlink:label="ProspectusTable" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="DocumentInformationDocumentAxis" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentDomain" xlink:label="DocumentDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="DocumentInformationDocumentAxis" xlink:to="DocumentDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="CoregistrantAxis" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AllCoregistrantsMember" xlink:label="AllCoregistrantsMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="CoregistrantAxis" xlink:to="AllCoregistrantsMember" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="LegalEntityAxis" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityDomain" xlink:label="EntityDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="EntityDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusLineItems" xlink:label="ProspectusLineItems" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ProspectusLineItems" order="5.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleByYearColumnName" xlink:label="ExpenseExampleByYearColumnName" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleByYearColumnName" use="optional" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleYear01" xlink:label="ExpenseExampleYear01" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleYear01" use="optional" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleYear03" xlink:label="ExpenseExampleYear03" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleYear03" use="optional" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleYear05" xlink:label="ExpenseExampleYear05" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleYear05" use="optional" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleYear10" xlink:label="ExpenseExampleYear10" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleYear10" use="optional" order="5.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ClassAxis" xlink:label="ClassAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ClassAxis" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ShareClassDomain" xlink:label="ShareClassDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="ShareClassDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleAbstract" xlink:label="ExpenseExampleAbstract" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ExpenseExampleAbstract" xlink:to="ProspectusTable" order="1.0" priority="1" />
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/15/role/ExpenseExampleNoRedemption" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:link="http://www.xbrl.org/2003/linkbase">
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusTable" xlink:label="ProspectusTable" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="DocumentInformationDocumentAxis" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentDomain" xlink:label="DocumentDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="DocumentInformationDocumentAxis" xlink:to="DocumentDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="CoregistrantAxis" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AllCoregistrantsMember" xlink:label="AllCoregistrantsMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="CoregistrantAxis" xlink:to="AllCoregistrantsMember" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="LegalEntityAxis" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityDomain" xlink:label="EntityDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="EntityDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusLineItems" xlink:label="ProspectusLineItems" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ProspectusLineItems" order="5.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleNoRedemptionByYearColumnName" xlink:label="ExpenseExampleNoRedemptionByYearColumnName" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleNoRedemptionByYearColumnName" use="optional" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleNoRedemptionYear01" xlink:label="ExpenseExampleNoRedemptionYear01" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleNoRedemptionYear01" use="optional" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleNoRedemptionYear03" xlink:label="ExpenseExampleNoRedemptionYear03" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleNoRedemptionYear03" use="optional" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleNoRedemptionYear05" xlink:label="ExpenseExampleNoRedemptionYear05" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleNoRedemptionYear05" use="optional" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleNoRedemptionYear10" xlink:label="ExpenseExampleNoRedemptionYear10" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleNoRedemptionYear10" use="optional" order="5.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ClassAxis" xlink:label="ClassAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ClassAxis" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ShareClassDomain" xlink:label="ShareClassDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="ShareClassDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleNoRedemptionAbstract" xlink:label="ExpenseExampleNoRedemptionAbstract" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ExpenseExampleNoRedemptionAbstract" xlink:to="ProspectusTable" order="1.0" priority="1" />
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/15/role/BarChartData" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:link="http://www.xbrl.org/2003/linkbase">
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusTable" xlink:label="ProspectusTable" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="DocumentInformationDocumentAxis" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentDomain" xlink:label="DocumentDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="DocumentInformationDocumentAxis" xlink:to="DocumentDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="CoregistrantAxis" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AllCoregistrantsMember" xlink:label="AllCoregistrantsMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="CoregistrantAxis" xlink:to="AllCoregistrantsMember" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="LegalEntityAxis" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityDomain" xlink:label="EntityDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="EntityDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusLineItems" xlink:label="ProspectusLineItems" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ProspectusLineItems" order="5.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AnnualReturnCaption" xlink:label="AnnualReturnCaption" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="AnnualReturnCaption" use="optional" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AnnualReturnColumnName" xlink:label="AnnualReturnColumnName" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="AnnualReturnColumnName" use="optional" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AnnualReturnInceptionDate" xlink:label="AnnualReturnInceptionDate" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="AnnualReturnInceptionDate" use="optional" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AnnlRtrPct" xlink:label="AnnlRtrPct" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="AnnlRtrPct" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ClassAxis" xlink:label="ClassAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ClassAxis" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ShareClassDomain" xlink:label="ShareClassDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="ShareClassDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_BarChartTableAbstract" xlink:label="BarChartTableAbstract" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="BarChartTableAbstract" xlink:to="ProspectusTable" order="1.0" priority="1" />
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/15/role/PerformanceTableData" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:link="http://www.xbrl.org/2003/linkbase">
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusTable" xlink:label="ProspectusTable" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="DocumentInformationDocumentAxis" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentDomain" xlink:label="DocumentDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="DocumentInformationDocumentAxis" xlink:to="DocumentDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="CoregistrantAxis" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AllCoregistrantsMember" xlink:label="AllCoregistrantsMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="CoregistrantAxis" xlink:to="AllCoregistrantsMember" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusLineItems" xlink:label="ProspectusLineItems" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ProspectusLineItems" order="5.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AverageAnnualReturnLabel" xlink:label="AverageAnnualReturnLabel" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="AverageAnnualReturnLabel" use="optional" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AvgAnnlRtrPct" xlink:label="AvgAnnlRtrPct" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="AvgAnnlRtrPct" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerfInceptionDate" xlink:label="PerfInceptionDate" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerfInceptionDate" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ClassAxis" xlink:label="ClassAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ClassAxis" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ShareClassDomain" xlink:label="ShareClassDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="ShareClassDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceMeasureAxis" xlink:label="PerformanceMeasureAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="PerformanceMeasureAxis" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceMeasureDomain" xlink:label="PerformanceMeasureDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="PerformanceMeasureAxis" xlink:to="PerformanceMeasureDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AfterTaxesOnDistributionsMember" xlink:label="AfterTaxesOnDistributionsMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="PerformanceMeasureDomain" xlink:to="AfterTaxesOnDistributionsMember" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AfterTaxesOnDistributionsAndSalesMember" xlink:label="AfterTaxesOnDistributionsAndSalesMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="PerformanceMeasureDomain" xlink:to="AfterTaxesOnDistributionsAndSalesMember" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AverageAnnualReturnAbstract" xlink:label="AverageAnnualReturnAbstract" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="AverageAnnualReturnAbstract" xlink:to="ProspectusTable" order="1.0" priority="1" />
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/15/role/N1aCover" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:link="http://www.xbrl.org/2003/linkbase">
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_FormN1aAbstract" xlink:label="FormN1aAbstract" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusTable" xlink:label="ProspectusTable" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="FormN1aAbstract" xlink:to="ProspectusTable" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="DocumentInformationDocumentAxis" use="optional" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentDomain" xlink:label="DocumentDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="DocumentInformationDocumentAxis" xlink:to="DocumentDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="CoregistrantAxis" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AllCoregistrantsMember" xlink:label="AllCoregistrantsMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="CoregistrantAxis" xlink:to="AllCoregistrantsMember" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusLineItems" xlink:label="ProspectusLineItems" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ProspectusLineItems" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentType" xlink:label="DocumentType" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="DocumentType" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_AmendmentFlag" xlink:label="AmendmentFlag" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="AmendmentFlag" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_AmendmentDescription" xlink:label="AmendmentDescription" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="AmendmentDescription" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityRegistrantName" xlink:label="EntityRegistrantName" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="EntityRegistrantName" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityCentralIndexKey" xlink:label="EntityCentralIndexKey" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="EntityCentralIndexKey" order="5.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityInvCompanyType" xlink:label="EntityInvCompanyType" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="EntityInvCompanyType" order="6.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentPeriodEndDate" xlink:label="DocumentPeriodEndDate" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="DocumentPeriodEndDate" order="7.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusDate" xlink:label="ProspectusDate" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ProspectusDate" order="8.0" priority="1" />
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/15/role/PerformanceManagement" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:link="http://www.xbrl.org/2003/linkbase">
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_FormN1aAbstract" xlink:label="FormN1aAbstract" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusTable" xlink:label="ProspectusTable" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="FormN1aAbstract" xlink:to="ProspectusTable" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="DocumentInformationDocumentAxis" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentDomain" xlink:label="DocumentDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="DocumentInformationDocumentAxis" xlink:to="DocumentDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="CoregistrantAxis" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AllCoregistrantsMember" xlink:label="AllCoregistrantsMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="CoregistrantAxis" xlink:to="AllCoregistrantsMember" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="LegalEntityAxis" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityDomain" xlink:label="EntityDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="EntityDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusLineItems" xlink:label="ProspectusLineItems" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ProspectusLineItems" order="5.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_BarChartAndPerformanceTableHeading" xlink:label="BarChartAndPerformanceTableHeading" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="BarChartAndPerformanceTableHeading" use="optional" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceNarrativeTextBlock" xlink:label="PerformanceNarrativeTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformanceNarrativeTextBlock" use="optional" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_BarChartNarrativeTextBlock" xlink:label="BarChartNarrativeTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="BarChartNarrativeTextBlock" use="optional" order="7.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_BarChartHeading" xlink:label="BarChartHeading" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="BarChartHeading" use="optional" order="11.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_BarChartFootnotesTextBlock" xlink:label="BarChartFootnotesTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="BarChartFootnotesTextBlock" use="optional" order="13.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_BarChartClosingTextBlock" xlink:label="BarChartClosingTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="BarChartClosingTextBlock" use="optional" order="14.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceTableHeading" xlink:label="PerformanceTableHeading" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformanceTableHeading" use="optional" order="24.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceTableNarrativeTextBlock" xlink:label="PerformanceTableNarrativeTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformanceTableNarrativeTextBlock" use="optional" order="25.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceTableClosingTextBlock" xlink:label="PerformanceTableClosingTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformanceTableClosingTextBlock" use="optional" order="39.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_BarChartTableTextBlock" xlink:label="BarChartTableTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="BarChartTableTextBlock" use="optional" order="12.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceTableTextBlock" xlink:label="PerformanceTableTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformanceTableTextBlock" use="optional" order="31.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_MarketIndexPerformanceTableTextBlock" xlink:label="MarketIndexPerformanceTableTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="MarketIndexPerformanceTableTextBlock" use="optional" order="34.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_MoneyMarketSevenDayYieldCaption" xlink:label="MoneyMarketSevenDayYieldCaption" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="MoneyMarketSevenDayYieldCaption" order="40.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_MoneyMarketSevenDayYieldColumnName" xlink:label="MoneyMarketSevenDayYieldColumnName" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="MoneyMarketSevenDayYieldColumnName" order="41.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_MoneyMarketSevenDayYieldPhone" xlink:label="MoneyMarketSevenDayYieldPhone" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="MoneyMarketSevenDayYieldPhone" order="42.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_MoneyMarketSevenDayYield" xlink:label="MoneyMarketSevenDayYield" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="MoneyMarketSevenDayYield" order="43.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_MoneyMarketSevenDayTaxEquivalentYield" xlink:label="MoneyMarketSevenDayTaxEquivalentYield" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="MoneyMarketSevenDayTaxEquivalentYield" order="44.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ThirtyDayYieldCaption" xlink:label="ThirtyDayYieldCaption" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ThirtyDayYieldCaption" order="45.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ThirtyDayYieldColumnName" xlink:label="ThirtyDayYieldColumnName" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ThirtyDayYieldColumnName" order="46.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ThirtyDayYieldPhone" xlink:label="ThirtyDayYieldPhone" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ThirtyDayYieldPhone" order="47.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ThirtyDayYield" xlink:label="ThirtyDayYield" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ThirtyDayYield" order="48.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ThirtyDayTaxEquivalentYield" xlink:label="ThirtyDayTaxEquivalentYield" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ThirtyDayTaxEquivalentYield" order="49.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceAvailabilityWebSiteAddress" xlink:label="PerformanceAvailabilityWebSiteAddress" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformanceAvailabilityWebSiteAddress" order="50.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceAvailabilityPhone" xlink:label="PerformanceAvailabilityPhone" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformanceAvailabilityPhone" order="51.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceTableFootnotesTextBlock" xlink:label="PerformanceTableFootnotesTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformanceTableFootnotesTextBlock" use="optional" order="35.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceTableFootnotesReasonPerformanceInformationForClassDifferentFromImmediatelyPrecedingPeriod" xlink:label="PerformanceTableFootnotesReasonPerformanceInformationForClassDifferentFromImmediatelyPrecedingPeriod" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformanceTableFootnotesReasonPerformanceInformationForClassDifferentFromImmediatelyPrecedingPeriod" order="36.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceTableOneClassOfAfterTaxShown" xlink:label="PerformanceTableOneClassOfAfterTaxShown" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformanceTableOneClassOfAfterTaxShown" order="37.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_IndexNoDeductionForFeesExpensesTaxes" xlink:label="IndexNoDeductionForFeesExpensesTaxes" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="IndexNoDeductionForFeesExpensesTaxes" order="38.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AverageAnnualReturnCaption" xlink:label="AverageAnnualReturnCaption" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="AverageAnnualReturnCaption" order="32.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AverageAnnualReturnColumnName" xlink:label="AverageAnnualReturnColumnName" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="AverageAnnualReturnColumnName" order="33.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceTableDoesReflectSalesLoads" xlink:label="PerformanceTableDoesReflectSalesLoads" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformanceTableDoesReflectSalesLoads" order="26.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceTableMarketIndexChanged" xlink:label="PerformanceTableMarketIndexChanged" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformanceTableMarketIndexChanged" order="27.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceTableUsesHighestFederalRate" xlink:label="PerformanceTableUsesHighestFederalRate" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformanceTableUsesHighestFederalRate" order="28.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceTableNotRelevantToTaxDeferred" xlink:label="PerformanceTableNotRelevantToTaxDeferred" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformanceTableNotRelevantToTaxDeferred" order="29.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceTableExplanationAfterTaxHigher" xlink:label="PerformanceTableExplanationAfterTaxHigher" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformanceTableExplanationAfterTaxHigher" order="30.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_YearToDateReturnLabel" xlink:label="YearToDateReturnLabel" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="YearToDateReturnLabel" order="15.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_BarChartYearToDateReturn" xlink:label="BarChartYearToDateReturn" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="BarChartYearToDateReturn" order="16.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_BarChartYearToDateReturnDate" xlink:label="BarChartYearToDateReturnDate" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="BarChartYearToDateReturnDate" order="17.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_HighestQuarterlyReturnLabel" xlink:label="HighestQuarterlyReturnLabel" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="HighestQuarterlyReturnLabel" order="18.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_BarChartHighestQuarterlyReturn" xlink:label="BarChartHighestQuarterlyReturn" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="BarChartHighestQuarterlyReturn" order="19.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_BarChartHighestQuarterlyReturnDate" xlink:label="BarChartHighestQuarterlyReturnDate" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="BarChartHighestQuarterlyReturnDate" order="20.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_LowestQuarterlyReturnLabel" xlink:label="LowestQuarterlyReturnLabel" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="LowestQuarterlyReturnLabel" order="21.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_BarChartLowestQuarterlyReturn" xlink:label="BarChartLowestQuarterlyReturn" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="BarChartLowestQuarterlyReturn" order="22.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_BarChartLowestQuarterlyReturnDate" xlink:label="BarChartLowestQuarterlyReturnDate" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="BarChartLowestQuarterlyReturnDate" order="23.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_BarChartDoesNotReflectSalesLoads" xlink:label="BarChartDoesNotReflectSalesLoads" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="BarChartDoesNotReflectSalesLoads" order="8.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_BarChartReturnsForClassNotOfferedInProspectus" xlink:label="BarChartReturnsForClassNotOfferedInProspectus" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="BarChartReturnsForClassNotOfferedInProspectus" order="9.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_BarChartReasonSelectedClassDifferentFromImmediatelyPrecedingPeriod" xlink:label="BarChartReasonSelectedClassDifferentFromImmediatelyPrecedingPeriod" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="BarChartReasonSelectedClassDifferentFromImmediatelyPrecedingPeriod" order="10.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformancePastDoesNotIndicateFuture" xlink:label="PerformancePastDoesNotIndicateFuture" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformancePastDoesNotIndicateFuture" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceInformationIllustratesVariabilityOfReturns" xlink:label="PerformanceInformationIllustratesVariabilityOfReturns" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformanceInformationIllustratesVariabilityOfReturns" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceOneYearOrLess" xlink:label="PerformanceOneYearOrLess" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformanceOneYearOrLess" order="5.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceAdditionalMarketIndex" xlink:label="PerformanceAdditionalMarketIndex" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformanceAdditionalMarketIndex" order="6.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ClassAxis" xlink:label="ClassAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ClassAxis" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ShareClassDomain" xlink:label="ShareClassDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="ShareClassDomain" order="1.0" priority="1" />
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/15/role/InvestmentRisks" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:link="http://www.xbrl.org/2003/linkbase">
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusTable" xlink:label="ProspectusTable" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="DocumentInformationDocumentAxis" use="optional" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentDomain" xlink:label="DocumentDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="DocumentInformationDocumentAxis" xlink:to="DocumentDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="CoregistrantAxis" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AllCoregistrantsMember" xlink:label="AllCoregistrantsMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="CoregistrantAxis" xlink:to="AllCoregistrantsMember" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="LegalEntityAxis" use="optional" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityDomain" xlink:label="EntityDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="EntityDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusLineItems" xlink:label="ProspectusLineItems" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ProspectusLineItems" order="5.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_RiskTextBlock" xlink:label="RiskTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="RiskTextBlock" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_RiskAxis" xlink:label="RiskAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="RiskAxis" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AllRisksMember" xlink:label="AllRisksMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="RiskAxis" xlink:to="AllRisksMember" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_RiskLoseMoneyMember" xlink:label="RiskLoseMoneyMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="RiskAxis" xlink:to="RiskLoseMoneyMember" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_RiskNotInsuredDepositoryInstitutionMember" xlink:label="RiskNotInsuredDepositoryInstitutionMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="RiskAxis" xlink:to="RiskNotInsuredDepositoryInstitutionMember" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_RiskNotInsuredMember" xlink:label="RiskNotInsuredMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="RiskAxis" xlink:to="RiskNotInsuredMember" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_RiskNondiversifiedStatusMember" xlink:label="RiskNondiversifiedStatusMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="RiskAxis" xlink:to="RiskNondiversifiedStatusMember" order="5.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_RiskMoneyMarketFundPriceFluctuatesMember" xlink:label="RiskMoneyMarketFundPriceFluctuatesMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="RiskAxis" xlink:to="RiskMoneyMarketFundPriceFluctuatesMember" order="6.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_RiskMoneyMarketFundMayImposeFeesOrSuspendSalesMember" xlink:label="RiskMoneyMarketFundMayImposeFeesOrSuspendSalesMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="RiskAxis" xlink:to="RiskMoneyMarketFundMayImposeFeesOrSuspendSalesMember" order="7.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_RiskMoneyMarketFundMayNotPreserveDollarMember" xlink:label="RiskMoneyMarketFundMayNotPreserveDollarMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="RiskAxis" xlink:to="RiskMoneyMarketFundMayNotPreserveDollarMember" order="8.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_RiskMoneyMarketFundSponsorMayNotProvideSupportMember" xlink:label="RiskMoneyMarketFundSponsorMayNotProvideSupportMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="RiskAxis" xlink:to="RiskMoneyMarketFundSponsorMayNotProvideSupportMember" order="9.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_RisksAbstract" xlink:label="RisksAbstract" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="RisksAbstract" xlink:to="ProspectusTable" use="optional" order="1.0" priority="1" />
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/15/role/InvestmentStrategy" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:link="http://www.xbrl.org/2003/linkbase">
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_FormN1aAbstract" xlink:label="FormN1aAbstract" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusTable" xlink:label="ProspectusTable" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="FormN1aAbstract" xlink:to="ProspectusTable" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="DocumentInformationDocumentAxis" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentDomain" xlink:label="DocumentDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="DocumentInformationDocumentAxis" xlink:to="DocumentDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="CoregistrantAxis" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AllCoregistrantsMember" xlink:label="AllCoregistrantsMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="CoregistrantAxis" xlink:to="AllCoregistrantsMember" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="LegalEntityAxis" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityDomain" xlink:label="EntityDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="EntityDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusLineItems" xlink:label="ProspectusLineItems" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ProspectusLineItems" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_StrategyHeading" xlink:label="StrategyHeading" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="StrategyHeading" use="optional" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_StrategyNarrativeTextBlock" xlink:label="StrategyNarrativeTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="StrategyNarrativeTextBlock" use="optional" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_StrategyPortfolioConcentration" xlink:label="StrategyPortfolioConcentration" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="StrategyPortfolioConcentration" order="3.0" priority="1" />
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/15/role/FeesAndExpenses" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:link="http://www.xbrl.org/2003/linkbase">
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_FormN1aAbstract" xlink:label="FormN1aAbstract" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusTable" xlink:label="ProspectusTable" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="FormN1aAbstract" xlink:to="ProspectusTable" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="DocumentInformationDocumentAxis" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentDomain" xlink:label="DocumentDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="DocumentInformationDocumentAxis" xlink:to="DocumentDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="CoregistrantAxis" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AllCoregistrantsMember" xlink:label="AllCoregistrantsMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="CoregistrantAxis" xlink:to="AllCoregistrantsMember" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="LegalEntityAxis" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityDomain" xlink:label="EntityDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="EntityDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusLineItems" xlink:label="ProspectusLineItems" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ProspectusLineItems" order="5.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseHeading" xlink:label="ExpenseHeading" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseHeading" use="optional" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseNarrativeTextBlock" xlink:label="ExpenseNarrativeTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseNarrativeTextBlock" use="optional" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ShareholderFeesCaption" xlink:label="ShareholderFeesCaption" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ShareholderFeesCaption" use="optional" order="11.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_OperatingExpensesCaption" xlink:label="OperatingExpensesCaption" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="OperatingExpensesCaption" use="optional" order="13.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseFootnotesTextBlock" xlink:label="ExpenseFootnotesTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseFootnotesTextBlock" use="optional" order="15.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpensesDeferredChargesTextBlock" xlink:label="ExpensesDeferredChargesTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpensesDeferredChargesTextBlock" use="optional" order="16.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpensesRangeOfExchangeFeesTextBlock" xlink:label="ExpensesRangeOfExchangeFeesTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpensesRangeOfExchangeFeesTextBlock" use="optional" order="17.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleHeading" xlink:label="ExpenseExampleHeading" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleHeading" use="optional" order="18.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleByYearHeading" xlink:label="ExpenseExampleByYearHeading" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleByYearHeading" use="optional" order="19.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleNarrativeTextBlock" xlink:label="ExpenseExampleNarrativeTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleNarrativeTextBlock" use="optional" order="20.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleByYearCaption" xlink:label="ExpenseExampleByYearCaption" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleByYearCaption" use="optional" order="21.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleNoRedemptionNarrativeTextBlock" xlink:label="ExpenseExampleNoRedemptionNarrativeTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleNoRedemptionNarrativeTextBlock" use="optional" order="23.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleNoRedemptionByYearCaption" xlink:label="ExpenseExampleNoRedemptionByYearCaption" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleNoRedemptionByYearCaption" use="optional" order="24.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleFootnotesTextBlock" xlink:label="ExpenseExampleFootnotesTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleFootnotesTextBlock" use="optional" order="26.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleClosingTextBlock" xlink:label="ExpenseExampleClosingTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleClosingTextBlock" use="optional" order="27.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PortfolioTurnoverHeading" xlink:label="PortfolioTurnoverHeading" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PortfolioTurnoverHeading" use="optional" order="28.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PortfolioTurnoverTextBlock" xlink:label="PortfolioTurnoverTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PortfolioTurnoverTextBlock" use="optional" order="29.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ShareholderFeesTableTextBlock" xlink:label="ShareholderFeesTableTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ShareholderFeesTableTextBlock" use="optional" order="12.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AnnualFundOperatingExpensesTableTextBlock" xlink:label="AnnualFundOperatingExpensesTableTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="AnnualFundOperatingExpensesTableTextBlock" use="optional" order="14.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleWithRedemptionTableTextBlock" xlink:label="ExpenseExampleWithRedemptionTableTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleWithRedemptionTableTextBlock" use="optional" order="22.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleNoRedemptionTableTextBlock" xlink:label="ExpenseExampleNoRedemptionTableTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleNoRedemptionTableTextBlock" use="optional" order="25.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PortfolioTurnoverRate" xlink:label="PortfolioTurnoverRate" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PortfolioTurnoverRate" order="30.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseBreakpointDiscounts" xlink:label="ExpenseBreakpointDiscounts" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseBreakpointDiscounts" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpensesOtherExpensesHadExtraordinaryExpensesBeenIncluded" xlink:label="ExpensesOtherExpensesHadExtraordinaryExpensesBeenIncluded" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpensesOtherExpensesHadExtraordinaryExpensesBeenIncluded" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpensesRestatedToReflectCurrent" xlink:label="ExpensesRestatedToReflectCurrent" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpensesRestatedToReflectCurrent" order="5.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseBreakpointMinimumInvestmentRequiredAmount" xlink:label="ExpenseBreakpointMinimumInvestmentRequiredAmount" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseBreakpointMinimumInvestmentRequiredAmount" order="6.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_OtherExpensesNewFundBasedOnEstimates" xlink:label="OtherExpensesNewFundBasedOnEstimates" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="OtherExpensesNewFundBasedOnEstimates" order="7.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AcquiredFundFeesAndExpensesBasedOnEstimates" xlink:label="AcquiredFundFeesAndExpensesBasedOnEstimates" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="AcquiredFundFeesAndExpensesBasedOnEstimates" order="8.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpensesNotCorrelatedToRatioDueToAcquiredFundFees" xlink:label="ExpensesNotCorrelatedToRatioDueToAcquiredFundFees" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpensesNotCorrelatedToRatioDueToAcquiredFundFees" order="9.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpensesExplanationOfNonrecurringAccountFee" xlink:label="ExpensesExplanationOfNonrecurringAccountFee" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpensesExplanationOfNonrecurringAccountFee" order="10.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ClassAxis" xlink:label="ClassAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ClassAxis" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ShareClassDomain" xlink:label="ShareClassDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="ShareClassDomain" order="1.0" priority="1" />
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/15/role/N1aSupplement" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:link="http://www.xbrl.org/2003/linkbase">
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_FormN1aAbstract" xlink:label="FormN1aAbstract" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusTable" xlink:label="ProspectusTable" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="FormN1aAbstract" xlink:to="ProspectusTable" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="DocumentInformationDocumentAxis" use="optional" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentDomain" xlink:label="DocumentDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="DocumentInformationDocumentAxis" xlink:to="DocumentDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="CoregistrantAxis" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AllCoregistrantsMember" xlink:label="AllCoregistrantsMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="CoregistrantAxis" xlink:to="AllCoregistrantsMember" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="LegalEntityAxis" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityDomain" xlink:label="EntityDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="EntityDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusLineItems" xlink:label="ProspectusLineItems" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ProspectusLineItems" order="5.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_SupplementToProspectusTextBlock" xlink:label="SupplementToProspectusTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="SupplementToProspectusTextBlock" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ClassAxis" xlink:label="ClassAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ClassAxis" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ShareClassDomain" xlink:label="ShareClassDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="ShareClassDomain" order="1.0" priority="1" />
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/16/role/RiskReturn" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:link="http://www.xbrl.org/2003/linkbase">
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_FormN1aAbstract" xlink:label="FormN1aAbstract" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusTable" xlink:label="ProspectusTable" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="FormN1aAbstract" xlink:to="ProspectusTable" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="DocumentInformationDocumentAxis" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentDomain" xlink:label="DocumentDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="DocumentInformationDocumentAxis" xlink:to="DocumentDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="CoregistrantAxis" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AllCoregistrantsMember" xlink:label="AllCoregistrantsMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="CoregistrantAxis" xlink:to="AllCoregistrantsMember" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="LegalEntityAxis" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityDomain" xlink:label="EntityDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="EntityDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusLineItems" xlink:label="ProspectusLineItems" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ProspectusLineItems" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_RiskReturnHeading" xlink:label="RiskReturnHeading" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="RiskReturnHeading" use="optional" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ObjectiveHeading" xlink:label="ObjectiveHeading" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ObjectiveHeading" use="optional" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ObjectivePrimaryTextBlock" xlink:label="ObjectivePrimaryTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ObjectivePrimaryTextBlock" use="optional" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ObjectiveSecondaryTextBlock" xlink:label="ObjectiveSecondaryTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ObjectiveSecondaryTextBlock" use="optional" order="4.0" priority="1" />
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/16/role/ShareholderFeesData" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:link="http://www.xbrl.org/2003/linkbase">
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusTable" xlink:label="ProspectusTable" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="DocumentInformationDocumentAxis" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentDomain" xlink:label="DocumentDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="DocumentInformationDocumentAxis" xlink:to="DocumentDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="CoregistrantAxis" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AllCoregistrantsMember" xlink:label="AllCoregistrantsMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="CoregistrantAxis" xlink:to="AllCoregistrantsMember" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="LegalEntityAxis" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityDomain" xlink:label="EntityDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="EntityDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusLineItems" xlink:label="ProspectusLineItems" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ProspectusLineItems" order="5.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ShareholderFeesColumnName" xlink:label="ShareholderFeesColumnName" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ShareholderFeesColumnName" use="optional" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_MaximumCumulativeSalesChargeOverOfferingPrice" xlink:label="MaximumCumulativeSalesChargeOverOfferingPrice" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="MaximumCumulativeSalesChargeOverOfferingPrice" use="optional" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_MaximumCumulativeSalesChargeOverOther" xlink:label="MaximumCumulativeSalesChargeOverOther" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="MaximumCumulativeSalesChargeOverOther" use="optional" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice" xlink:label="MaximumSalesChargeImposedOnPurchasesOverOfferingPrice" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="MaximumSalesChargeImposedOnPurchasesOverOfferingPrice" use="optional" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_MaximumDeferredSalesChargeOverOfferingPrice" xlink:label="MaximumDeferredSalesChargeOverOfferingPrice" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="MaximumDeferredSalesChargeOverOfferingPrice" use="optional" order="5.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_MaximumDeferredSalesChargeOverOther" xlink:label="MaximumDeferredSalesChargeOverOther" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="MaximumDeferredSalesChargeOverOther" use="optional" order="6.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther" xlink:label="MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther" use="optional" order="7.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_RedemptionFeeOverRedemption" xlink:label="RedemptionFeeOverRedemption" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="RedemptionFeeOverRedemption" use="optional" order="8.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_RedemptionFee" xlink:label="RedemptionFee" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="RedemptionFee" use="optional" order="9.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExchangeFeeOverRedemption" xlink:label="ExchangeFeeOverRedemption" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExchangeFeeOverRedemption" use="optional" order="10.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExchangeFee" xlink:label="ExchangeFee" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExchangeFee" use="optional" order="11.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_MaximumAccountFeeOverAssets" xlink:label="MaximumAccountFeeOverAssets" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="MaximumAccountFeeOverAssets" use="optional" order="12.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_MaximumAccountFee" xlink:label="MaximumAccountFee" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="MaximumAccountFee" use="optional" order="13.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ShareholderFeeOther" xlink:label="ShareholderFeeOther" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ShareholderFeeOther" use="optional" order="14.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ClassAxis" xlink:label="ClassAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ClassAxis" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ShareClassDomain" xlink:label="ShareClassDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="ShareClassDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ShareholderFeesAbstract" xlink:label="ShareholderFeesAbstract" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ShareholderFeesAbstract" xlink:to="ProspectusTable" order="1.0" priority="1" />
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/16/role/OperatingExpensesData" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:link="http://www.xbrl.org/2003/linkbase">
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_FormN1aAbstract" xlink:label="FormN1aAbstract" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusTable" xlink:label="ProspectusTable" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="FormN1aAbstract" xlink:to="ProspectusTable" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="DocumentInformationDocumentAxis" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentDomain" xlink:label="DocumentDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="DocumentInformationDocumentAxis" xlink:to="DocumentDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="CoregistrantAxis" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AllCoregistrantsMember" xlink:label="AllCoregistrantsMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="CoregistrantAxis" xlink:to="AllCoregistrantsMember" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="LegalEntityAxis" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityDomain" xlink:label="EntityDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="EntityDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusLineItems" xlink:label="ProspectusLineItems" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ProspectusLineItems" order="5.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_OperatingExpensesColumnName" xlink:label="OperatingExpensesColumnName" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="OperatingExpensesColumnName" use="optional" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ManagementFeesOverAssets" xlink:label="ManagementFeesOverAssets" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ManagementFeesOverAssets" use="optional" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_DistributionAndService12b1FeesOverAssets" xlink:label="DistributionAndService12b1FeesOverAssets" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="DistributionAndService12b1FeesOverAssets" use="optional" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_DistributionOrSimilarNon12b1FeesOverAssets" xlink:label="DistributionOrSimilarNon12b1FeesOverAssets" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="DistributionOrSimilarNon12b1FeesOverAssets" use="optional" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_Component1OtherExpensesOverAssets" xlink:label="Component1OtherExpensesOverAssets" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="Component1OtherExpensesOverAssets" use="optional" order="5.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_Component2OtherExpensesOverAssets" xlink:label="Component2OtherExpensesOverAssets" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="Component2OtherExpensesOverAssets" use="optional" order="6.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_Component3OtherExpensesOverAssets" xlink:label="Component3OtherExpensesOverAssets" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="Component3OtherExpensesOverAssets" use="optional" order="7.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_OtherExpensesOverAssets" xlink:label="OtherExpensesOverAssets" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="OtherExpensesOverAssets" use="optional" order="8.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AcquiredFundFeesAndExpensesOverAssets" xlink:label="AcquiredFundFeesAndExpensesOverAssets" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="AcquiredFundFeesAndExpensesOverAssets" use="optional" order="9.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpensesOverAssets" xlink:label="ExpensesOverAssets" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpensesOverAssets" use="optional" order="10.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_FeeWaiverOrReimbursementOverAssets" xlink:label="FeeWaiverOrReimbursementOverAssets" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="FeeWaiverOrReimbursementOverAssets" use="optional" order="11.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_NetExpensesOverAssets" xlink:label="NetExpensesOverAssets" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="NetExpensesOverAssets" use="optional" order="12.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_FeeWaiverOrReimbursementOverAssetsDateOfTermination" xlink:label="FeeWaiverOrReimbursementOverAssetsDateOfTermination" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="FeeWaiverOrReimbursementOverAssetsDateOfTermination" order="13.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ClassAxis" xlink:label="ClassAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ClassAxis" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ShareClassDomain" xlink:label="ShareClassDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="ShareClassDomain" order="1.0" priority="1" />
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/16/role/ExpenseExample" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:link="http://www.xbrl.org/2003/linkbase">
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusTable" xlink:label="ProspectusTable" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="DocumentInformationDocumentAxis" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentDomain" xlink:label="DocumentDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="DocumentInformationDocumentAxis" xlink:to="DocumentDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="CoregistrantAxis" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AllCoregistrantsMember" xlink:label="AllCoregistrantsMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="CoregistrantAxis" xlink:to="AllCoregistrantsMember" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="LegalEntityAxis" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityDomain" xlink:label="EntityDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="EntityDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusLineItems" xlink:label="ProspectusLineItems" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ProspectusLineItems" order="5.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleByYearColumnName" xlink:label="ExpenseExampleByYearColumnName" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleByYearColumnName" use="optional" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleYear01" xlink:label="ExpenseExampleYear01" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleYear01" use="optional" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleYear03" xlink:label="ExpenseExampleYear03" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleYear03" use="optional" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleYear05" xlink:label="ExpenseExampleYear05" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleYear05" use="optional" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleYear10" xlink:label="ExpenseExampleYear10" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleYear10" use="optional" order="5.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ClassAxis" xlink:label="ClassAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ClassAxis" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ShareClassDomain" xlink:label="ShareClassDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="ShareClassDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleAbstract" xlink:label="ExpenseExampleAbstract" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ExpenseExampleAbstract" xlink:to="ProspectusTable" order="1.0" priority="1" />
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/16/role/ExpenseExampleNoRedemption" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:link="http://www.xbrl.org/2003/linkbase">
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusTable" xlink:label="ProspectusTable" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="DocumentInformationDocumentAxis" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentDomain" xlink:label="DocumentDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="DocumentInformationDocumentAxis" xlink:to="DocumentDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="CoregistrantAxis" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AllCoregistrantsMember" xlink:label="AllCoregistrantsMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="CoregistrantAxis" xlink:to="AllCoregistrantsMember" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="LegalEntityAxis" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityDomain" xlink:label="EntityDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="EntityDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusLineItems" xlink:label="ProspectusLineItems" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ProspectusLineItems" order="5.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleNoRedemptionByYearColumnName" xlink:label="ExpenseExampleNoRedemptionByYearColumnName" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleNoRedemptionByYearColumnName" use="optional" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleNoRedemptionYear01" xlink:label="ExpenseExampleNoRedemptionYear01" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleNoRedemptionYear01" use="optional" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleNoRedemptionYear03" xlink:label="ExpenseExampleNoRedemptionYear03" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleNoRedemptionYear03" use="optional" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleNoRedemptionYear05" xlink:label="ExpenseExampleNoRedemptionYear05" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleNoRedemptionYear05" use="optional" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleNoRedemptionYear10" xlink:label="ExpenseExampleNoRedemptionYear10" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleNoRedemptionYear10" use="optional" order="5.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ClassAxis" xlink:label="ClassAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ClassAxis" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ShareClassDomain" xlink:label="ShareClassDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="ShareClassDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleNoRedemptionAbstract" xlink:label="ExpenseExampleNoRedemptionAbstract" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ExpenseExampleNoRedemptionAbstract" xlink:to="ProspectusTable" order="1.0" priority="1" />
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/16/role/BarChartData" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:link="http://www.xbrl.org/2003/linkbase">
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusTable" xlink:label="ProspectusTable" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="DocumentInformationDocumentAxis" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentDomain" xlink:label="DocumentDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="DocumentInformationDocumentAxis" xlink:to="DocumentDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="CoregistrantAxis" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AllCoregistrantsMember" xlink:label="AllCoregistrantsMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="CoregistrantAxis" xlink:to="AllCoregistrantsMember" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="LegalEntityAxis" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityDomain" xlink:label="EntityDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="EntityDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusLineItems" xlink:label="ProspectusLineItems" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ProspectusLineItems" order="5.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AnnualReturnCaption" xlink:label="AnnualReturnCaption" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="AnnualReturnCaption" use="optional" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AnnualReturnColumnName" xlink:label="AnnualReturnColumnName" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="AnnualReturnColumnName" use="optional" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AnnualReturnInceptionDate" xlink:label="AnnualReturnInceptionDate" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="AnnualReturnInceptionDate" use="optional" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AnnlRtrPct" xlink:label="AnnlRtrPct" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="AnnlRtrPct" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ClassAxis" xlink:label="ClassAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ClassAxis" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ShareClassDomain" xlink:label="ShareClassDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="ShareClassDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_BarChartTableAbstract" xlink:label="BarChartTableAbstract" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="BarChartTableAbstract" xlink:to="ProspectusTable" order="1.0" priority="1" />
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/16/role/PerformanceTableData" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:link="http://www.xbrl.org/2003/linkbase">
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusTable" xlink:label="ProspectusTable" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="DocumentInformationDocumentAxis" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentDomain" xlink:label="DocumentDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="DocumentInformationDocumentAxis" xlink:to="DocumentDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="CoregistrantAxis" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AllCoregistrantsMember" xlink:label="AllCoregistrantsMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="CoregistrantAxis" xlink:to="AllCoregistrantsMember" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusLineItems" xlink:label="ProspectusLineItems" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ProspectusLineItems" order="5.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AverageAnnualReturnLabel" xlink:label="AverageAnnualReturnLabel" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="AverageAnnualReturnLabel" use="optional" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AvgAnnlRtrPct" xlink:label="AvgAnnlRtrPct" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="AvgAnnlRtrPct" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerfInceptionDate" xlink:label="PerfInceptionDate" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerfInceptionDate" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ClassAxis" xlink:label="ClassAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ClassAxis" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ShareClassDomain" xlink:label="ShareClassDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="ShareClassDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceMeasureAxis" xlink:label="PerformanceMeasureAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="PerformanceMeasureAxis" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceMeasureDomain" xlink:label="PerformanceMeasureDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="PerformanceMeasureAxis" xlink:to="PerformanceMeasureDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AfterTaxesOnDistributionsMember" xlink:label="AfterTaxesOnDistributionsMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="PerformanceMeasureDomain" xlink:to="AfterTaxesOnDistributionsMember" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AfterTaxesOnDistributionsAndSalesMember" xlink:label="AfterTaxesOnDistributionsAndSalesMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="PerformanceMeasureDomain" xlink:to="AfterTaxesOnDistributionsAndSalesMember" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AverageAnnualReturnAbstract" xlink:label="AverageAnnualReturnAbstract" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="AverageAnnualReturnAbstract" xlink:to="ProspectusTable" order="1.0" priority="1" />
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/16/role/N1aCover" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:link="http://www.xbrl.org/2003/linkbase">
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_FormN1aAbstract" xlink:label="FormN1aAbstract" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusTable" xlink:label="ProspectusTable" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="FormN1aAbstract" xlink:to="ProspectusTable" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="DocumentInformationDocumentAxis" use="optional" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentDomain" xlink:label="DocumentDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="DocumentInformationDocumentAxis" xlink:to="DocumentDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="CoregistrantAxis" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AllCoregistrantsMember" xlink:label="AllCoregistrantsMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="CoregistrantAxis" xlink:to="AllCoregistrantsMember" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusLineItems" xlink:label="ProspectusLineItems" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ProspectusLineItems" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentType" xlink:label="DocumentType" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="DocumentType" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_AmendmentFlag" xlink:label="AmendmentFlag" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="AmendmentFlag" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_AmendmentDescription" xlink:label="AmendmentDescription" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="AmendmentDescription" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityRegistrantName" xlink:label="EntityRegistrantName" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="EntityRegistrantName" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityCentralIndexKey" xlink:label="EntityCentralIndexKey" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="EntityCentralIndexKey" order="5.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityInvCompanyType" xlink:label="EntityInvCompanyType" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="EntityInvCompanyType" order="6.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentPeriodEndDate" xlink:label="DocumentPeriodEndDate" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="DocumentPeriodEndDate" order="7.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusDate" xlink:label="ProspectusDate" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ProspectusDate" order="8.0" priority="1" />
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/16/role/PerformanceManagement" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:link="http://www.xbrl.org/2003/linkbase">
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_FormN1aAbstract" xlink:label="FormN1aAbstract" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusTable" xlink:label="ProspectusTable" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="FormN1aAbstract" xlink:to="ProspectusTable" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="DocumentInformationDocumentAxis" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentDomain" xlink:label="DocumentDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="DocumentInformationDocumentAxis" xlink:to="DocumentDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="CoregistrantAxis" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AllCoregistrantsMember" xlink:label="AllCoregistrantsMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="CoregistrantAxis" xlink:to="AllCoregistrantsMember" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="LegalEntityAxis" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityDomain" xlink:label="EntityDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="EntityDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusLineItems" xlink:label="ProspectusLineItems" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ProspectusLineItems" order="5.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_BarChartAndPerformanceTableHeading" xlink:label="BarChartAndPerformanceTableHeading" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="BarChartAndPerformanceTableHeading" use="optional" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceNarrativeTextBlock" xlink:label="PerformanceNarrativeTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformanceNarrativeTextBlock" use="optional" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_BarChartNarrativeTextBlock" xlink:label="BarChartNarrativeTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="BarChartNarrativeTextBlock" use="optional" order="7.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_BarChartHeading" xlink:label="BarChartHeading" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="BarChartHeading" use="optional" order="11.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_BarChartFootnotesTextBlock" xlink:label="BarChartFootnotesTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="BarChartFootnotesTextBlock" use="optional" order="13.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_BarChartClosingTextBlock" xlink:label="BarChartClosingTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="BarChartClosingTextBlock" use="optional" order="14.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceTableHeading" xlink:label="PerformanceTableHeading" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformanceTableHeading" use="optional" order="24.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceTableNarrativeTextBlock" xlink:label="PerformanceTableNarrativeTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformanceTableNarrativeTextBlock" use="optional" order="25.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceTableClosingTextBlock" xlink:label="PerformanceTableClosingTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformanceTableClosingTextBlock" use="optional" order="39.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_BarChartTableTextBlock" xlink:label="BarChartTableTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="BarChartTableTextBlock" use="optional" order="12.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceTableTextBlock" xlink:label="PerformanceTableTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformanceTableTextBlock" use="optional" order="31.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_MarketIndexPerformanceTableTextBlock" xlink:label="MarketIndexPerformanceTableTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="MarketIndexPerformanceTableTextBlock" use="optional" order="34.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_MoneyMarketSevenDayYieldCaption" xlink:label="MoneyMarketSevenDayYieldCaption" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="MoneyMarketSevenDayYieldCaption" order="40.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_MoneyMarketSevenDayYieldColumnName" xlink:label="MoneyMarketSevenDayYieldColumnName" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="MoneyMarketSevenDayYieldColumnName" order="41.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_MoneyMarketSevenDayYieldPhone" xlink:label="MoneyMarketSevenDayYieldPhone" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="MoneyMarketSevenDayYieldPhone" order="42.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_MoneyMarketSevenDayYield" xlink:label="MoneyMarketSevenDayYield" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="MoneyMarketSevenDayYield" order="43.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_MoneyMarketSevenDayTaxEquivalentYield" xlink:label="MoneyMarketSevenDayTaxEquivalentYield" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="MoneyMarketSevenDayTaxEquivalentYield" order="44.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ThirtyDayYieldCaption" xlink:label="ThirtyDayYieldCaption" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ThirtyDayYieldCaption" order="45.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ThirtyDayYieldColumnName" xlink:label="ThirtyDayYieldColumnName" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ThirtyDayYieldColumnName" order="46.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ThirtyDayYieldPhone" xlink:label="ThirtyDayYieldPhone" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ThirtyDayYieldPhone" order="47.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ThirtyDayYield" xlink:label="ThirtyDayYield" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ThirtyDayYield" order="48.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ThirtyDayTaxEquivalentYield" xlink:label="ThirtyDayTaxEquivalentYield" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ThirtyDayTaxEquivalentYield" order="49.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceAvailabilityWebSiteAddress" xlink:label="PerformanceAvailabilityWebSiteAddress" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformanceAvailabilityWebSiteAddress" order="50.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceAvailabilityPhone" xlink:label="PerformanceAvailabilityPhone" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformanceAvailabilityPhone" order="51.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceTableFootnotesTextBlock" xlink:label="PerformanceTableFootnotesTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformanceTableFootnotesTextBlock" use="optional" order="35.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceTableFootnotesReasonPerformanceInformationForClassDifferentFromImmediatelyPrecedingPeriod" xlink:label="PerformanceTableFootnotesReasonPerformanceInformationForClassDifferentFromImmediatelyPrecedingPeriod" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformanceTableFootnotesReasonPerformanceInformationForClassDifferentFromImmediatelyPrecedingPeriod" order="36.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceTableOneClassOfAfterTaxShown" xlink:label="PerformanceTableOneClassOfAfterTaxShown" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformanceTableOneClassOfAfterTaxShown" order="37.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_IndexNoDeductionForFeesExpensesTaxes" xlink:label="IndexNoDeductionForFeesExpensesTaxes" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="IndexNoDeductionForFeesExpensesTaxes" order="38.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AverageAnnualReturnCaption" xlink:label="AverageAnnualReturnCaption" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="AverageAnnualReturnCaption" order="32.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AverageAnnualReturnColumnName" xlink:label="AverageAnnualReturnColumnName" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="AverageAnnualReturnColumnName" order="33.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceTableDoesReflectSalesLoads" xlink:label="PerformanceTableDoesReflectSalesLoads" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformanceTableDoesReflectSalesLoads" order="26.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceTableMarketIndexChanged" xlink:label="PerformanceTableMarketIndexChanged" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformanceTableMarketIndexChanged" order="27.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceTableUsesHighestFederalRate" xlink:label="PerformanceTableUsesHighestFederalRate" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformanceTableUsesHighestFederalRate" order="28.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceTableNotRelevantToTaxDeferred" xlink:label="PerformanceTableNotRelevantToTaxDeferred" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformanceTableNotRelevantToTaxDeferred" order="29.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceTableExplanationAfterTaxHigher" xlink:label="PerformanceTableExplanationAfterTaxHigher" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformanceTableExplanationAfterTaxHigher" order="30.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_YearToDateReturnLabel" xlink:label="YearToDateReturnLabel" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="YearToDateReturnLabel" order="15.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_BarChartYearToDateReturn" xlink:label="BarChartYearToDateReturn" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="BarChartYearToDateReturn" order="16.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_BarChartYearToDateReturnDate" xlink:label="BarChartYearToDateReturnDate" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="BarChartYearToDateReturnDate" order="17.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_HighestQuarterlyReturnLabel" xlink:label="HighestQuarterlyReturnLabel" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="HighestQuarterlyReturnLabel" order="18.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_BarChartHighestQuarterlyReturn" xlink:label="BarChartHighestQuarterlyReturn" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="BarChartHighestQuarterlyReturn" order="19.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_BarChartHighestQuarterlyReturnDate" xlink:label="BarChartHighestQuarterlyReturnDate" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="BarChartHighestQuarterlyReturnDate" order="20.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_LowestQuarterlyReturnLabel" xlink:label="LowestQuarterlyReturnLabel" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="LowestQuarterlyReturnLabel" order="21.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_BarChartLowestQuarterlyReturn" xlink:label="BarChartLowestQuarterlyReturn" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="BarChartLowestQuarterlyReturn" order="22.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_BarChartLowestQuarterlyReturnDate" xlink:label="BarChartLowestQuarterlyReturnDate" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="BarChartLowestQuarterlyReturnDate" order="23.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_BarChartDoesNotReflectSalesLoads" xlink:label="BarChartDoesNotReflectSalesLoads" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="BarChartDoesNotReflectSalesLoads" order="8.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_BarChartReturnsForClassNotOfferedInProspectus" xlink:label="BarChartReturnsForClassNotOfferedInProspectus" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="BarChartReturnsForClassNotOfferedInProspectus" order="9.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_BarChartReasonSelectedClassDifferentFromImmediatelyPrecedingPeriod" xlink:label="BarChartReasonSelectedClassDifferentFromImmediatelyPrecedingPeriod" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="BarChartReasonSelectedClassDifferentFromImmediatelyPrecedingPeriod" order="10.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformancePastDoesNotIndicateFuture" xlink:label="PerformancePastDoesNotIndicateFuture" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformancePastDoesNotIndicateFuture" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceInformationIllustratesVariabilityOfReturns" xlink:label="PerformanceInformationIllustratesVariabilityOfReturns" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformanceInformationIllustratesVariabilityOfReturns" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceOneYearOrLess" xlink:label="PerformanceOneYearOrLess" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformanceOneYearOrLess" order="5.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceAdditionalMarketIndex" xlink:label="PerformanceAdditionalMarketIndex" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformanceAdditionalMarketIndex" order="6.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ClassAxis" xlink:label="ClassAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ClassAxis" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ShareClassDomain" xlink:label="ShareClassDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="ShareClassDomain" order="1.0" priority="1" />
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/16/role/InvestmentRisks" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:link="http://www.xbrl.org/2003/linkbase">
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusTable" xlink:label="ProspectusTable" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="DocumentInformationDocumentAxis" use="optional" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentDomain" xlink:label="DocumentDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="DocumentInformationDocumentAxis" xlink:to="DocumentDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="CoregistrantAxis" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AllCoregistrantsMember" xlink:label="AllCoregistrantsMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="CoregistrantAxis" xlink:to="AllCoregistrantsMember" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="LegalEntityAxis" use="optional" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityDomain" xlink:label="EntityDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="EntityDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusLineItems" xlink:label="ProspectusLineItems" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ProspectusLineItems" order="5.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_RiskTextBlock" xlink:label="RiskTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="RiskTextBlock" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_RiskAxis" xlink:label="RiskAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="RiskAxis" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AllRisksMember" xlink:label="AllRisksMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="RiskAxis" xlink:to="AllRisksMember" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_RiskLoseMoneyMember" xlink:label="RiskLoseMoneyMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="RiskAxis" xlink:to="RiskLoseMoneyMember" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_RiskNotInsuredDepositoryInstitutionMember" xlink:label="RiskNotInsuredDepositoryInstitutionMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="RiskAxis" xlink:to="RiskNotInsuredDepositoryInstitutionMember" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_RiskNotInsuredMember" xlink:label="RiskNotInsuredMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="RiskAxis" xlink:to="RiskNotInsuredMember" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_RiskNondiversifiedStatusMember" xlink:label="RiskNondiversifiedStatusMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="RiskAxis" xlink:to="RiskNondiversifiedStatusMember" order="5.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_RiskMoneyMarketFundPriceFluctuatesMember" xlink:label="RiskMoneyMarketFundPriceFluctuatesMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="RiskAxis" xlink:to="RiskMoneyMarketFundPriceFluctuatesMember" order="6.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_RiskMoneyMarketFundMayImposeFeesOrSuspendSalesMember" xlink:label="RiskMoneyMarketFundMayImposeFeesOrSuspendSalesMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="RiskAxis" xlink:to="RiskMoneyMarketFundMayImposeFeesOrSuspendSalesMember" order="7.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_RiskMoneyMarketFundMayNotPreserveDollarMember" xlink:label="RiskMoneyMarketFundMayNotPreserveDollarMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="RiskAxis" xlink:to="RiskMoneyMarketFundMayNotPreserveDollarMember" order="8.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_RiskMoneyMarketFundSponsorMayNotProvideSupportMember" xlink:label="RiskMoneyMarketFundSponsorMayNotProvideSupportMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="RiskAxis" xlink:to="RiskMoneyMarketFundSponsorMayNotProvideSupportMember" order="9.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_RisksAbstract" xlink:label="RisksAbstract" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="RisksAbstract" xlink:to="ProspectusTable" use="optional" order="1.0" priority="1" />
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/16/role/InvestmentStrategy" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:link="http://www.xbrl.org/2003/linkbase">
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_FormN1aAbstract" xlink:label="FormN1aAbstract" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusTable" xlink:label="ProspectusTable" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="FormN1aAbstract" xlink:to="ProspectusTable" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="DocumentInformationDocumentAxis" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentDomain" xlink:label="DocumentDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="DocumentInformationDocumentAxis" xlink:to="DocumentDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="CoregistrantAxis" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AllCoregistrantsMember" xlink:label="AllCoregistrantsMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="CoregistrantAxis" xlink:to="AllCoregistrantsMember" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="LegalEntityAxis" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityDomain" xlink:label="EntityDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="EntityDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusLineItems" xlink:label="ProspectusLineItems" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ProspectusLineItems" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_StrategyHeading" xlink:label="StrategyHeading" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="StrategyHeading" use="optional" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_StrategyNarrativeTextBlock" xlink:label="StrategyNarrativeTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="StrategyNarrativeTextBlock" use="optional" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_StrategyPortfolioConcentration" xlink:label="StrategyPortfolioConcentration" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="StrategyPortfolioConcentration" order="3.0" priority="1" />
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/16/role/FeesAndExpenses" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:link="http://www.xbrl.org/2003/linkbase">
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_FormN1aAbstract" xlink:label="FormN1aAbstract" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusTable" xlink:label="ProspectusTable" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="FormN1aAbstract" xlink:to="ProspectusTable" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="DocumentInformationDocumentAxis" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentDomain" xlink:label="DocumentDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="DocumentInformationDocumentAxis" xlink:to="DocumentDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="CoregistrantAxis" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AllCoregistrantsMember" xlink:label="AllCoregistrantsMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="CoregistrantAxis" xlink:to="AllCoregistrantsMember" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="LegalEntityAxis" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityDomain" xlink:label="EntityDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="EntityDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusLineItems" xlink:label="ProspectusLineItems" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ProspectusLineItems" order="5.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseHeading" xlink:label="ExpenseHeading" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseHeading" use="optional" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseNarrativeTextBlock" xlink:label="ExpenseNarrativeTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseNarrativeTextBlock" use="optional" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ShareholderFeesCaption" xlink:label="ShareholderFeesCaption" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ShareholderFeesCaption" use="optional" order="11.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_OperatingExpensesCaption" xlink:label="OperatingExpensesCaption" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="OperatingExpensesCaption" use="optional" order="13.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseFootnotesTextBlock" xlink:label="ExpenseFootnotesTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseFootnotesTextBlock" use="optional" order="15.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpensesDeferredChargesTextBlock" xlink:label="ExpensesDeferredChargesTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpensesDeferredChargesTextBlock" use="optional" order="16.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpensesRangeOfExchangeFeesTextBlock" xlink:label="ExpensesRangeOfExchangeFeesTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpensesRangeOfExchangeFeesTextBlock" use="optional" order="17.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleHeading" xlink:label="ExpenseExampleHeading" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleHeading" use="optional" order="18.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleByYearHeading" xlink:label="ExpenseExampleByYearHeading" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleByYearHeading" use="optional" order="19.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleNarrativeTextBlock" xlink:label="ExpenseExampleNarrativeTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleNarrativeTextBlock" use="optional" order="20.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleByYearCaption" xlink:label="ExpenseExampleByYearCaption" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleByYearCaption" use="optional" order="21.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleNoRedemptionNarrativeTextBlock" xlink:label="ExpenseExampleNoRedemptionNarrativeTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleNoRedemptionNarrativeTextBlock" use="optional" order="23.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleNoRedemptionByYearCaption" xlink:label="ExpenseExampleNoRedemptionByYearCaption" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleNoRedemptionByYearCaption" use="optional" order="24.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleFootnotesTextBlock" xlink:label="ExpenseExampleFootnotesTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleFootnotesTextBlock" use="optional" order="26.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleClosingTextBlock" xlink:label="ExpenseExampleClosingTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleClosingTextBlock" use="optional" order="27.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PortfolioTurnoverHeading" xlink:label="PortfolioTurnoverHeading" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PortfolioTurnoverHeading" use="optional" order="28.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PortfolioTurnoverTextBlock" xlink:label="PortfolioTurnoverTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PortfolioTurnoverTextBlock" use="optional" order="29.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ShareholderFeesTableTextBlock" xlink:label="ShareholderFeesTableTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ShareholderFeesTableTextBlock" use="optional" order="12.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AnnualFundOperatingExpensesTableTextBlock" xlink:label="AnnualFundOperatingExpensesTableTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="AnnualFundOperatingExpensesTableTextBlock" use="optional" order="14.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleWithRedemptionTableTextBlock" xlink:label="ExpenseExampleWithRedemptionTableTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleWithRedemptionTableTextBlock" use="optional" order="22.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleNoRedemptionTableTextBlock" xlink:label="ExpenseExampleNoRedemptionTableTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleNoRedemptionTableTextBlock" use="optional" order="25.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PortfolioTurnoverRate" xlink:label="PortfolioTurnoverRate" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PortfolioTurnoverRate" order="30.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseBreakpointDiscounts" xlink:label="ExpenseBreakpointDiscounts" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseBreakpointDiscounts" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpensesOtherExpensesHadExtraordinaryExpensesBeenIncluded" xlink:label="ExpensesOtherExpensesHadExtraordinaryExpensesBeenIncluded" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpensesOtherExpensesHadExtraordinaryExpensesBeenIncluded" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpensesRestatedToReflectCurrent" xlink:label="ExpensesRestatedToReflectCurrent" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpensesRestatedToReflectCurrent" order="5.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseBreakpointMinimumInvestmentRequiredAmount" xlink:label="ExpenseBreakpointMinimumInvestmentRequiredAmount" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseBreakpointMinimumInvestmentRequiredAmount" order="6.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_OtherExpensesNewFundBasedOnEstimates" xlink:label="OtherExpensesNewFundBasedOnEstimates" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="OtherExpensesNewFundBasedOnEstimates" order="7.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AcquiredFundFeesAndExpensesBasedOnEstimates" xlink:label="AcquiredFundFeesAndExpensesBasedOnEstimates" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="AcquiredFundFeesAndExpensesBasedOnEstimates" order="8.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpensesNotCorrelatedToRatioDueToAcquiredFundFees" xlink:label="ExpensesNotCorrelatedToRatioDueToAcquiredFundFees" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpensesNotCorrelatedToRatioDueToAcquiredFundFees" order="9.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpensesExplanationOfNonrecurringAccountFee" xlink:label="ExpensesExplanationOfNonrecurringAccountFee" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpensesExplanationOfNonrecurringAccountFee" order="10.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ClassAxis" xlink:label="ClassAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ClassAxis" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ShareClassDomain" xlink:label="ShareClassDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="ShareClassDomain" order="1.0" priority="1" />
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/16/role/N1aSupplement" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:link="http://www.xbrl.org/2003/linkbase">
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_FormN1aAbstract" xlink:label="FormN1aAbstract" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusTable" xlink:label="ProspectusTable" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="FormN1aAbstract" xlink:to="ProspectusTable" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="DocumentInformationDocumentAxis" use="optional" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentDomain" xlink:label="DocumentDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="DocumentInformationDocumentAxis" xlink:to="DocumentDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="CoregistrantAxis" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AllCoregistrantsMember" xlink:label="AllCoregistrantsMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="CoregistrantAxis" xlink:to="AllCoregistrantsMember" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="LegalEntityAxis" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityDomain" xlink:label="EntityDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="EntityDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusLineItems" xlink:label="ProspectusLineItems" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ProspectusLineItems" order="5.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_SupplementToProspectusTextBlock" xlink:label="SupplementToProspectusTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="SupplementToProspectusTextBlock" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ClassAxis" xlink:label="ClassAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ClassAxis" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ShareClassDomain" xlink:label="ShareClassDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="ShareClassDomain" order="1.0" priority="1" />
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/17/role/RiskReturn" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:link="http://www.xbrl.org/2003/linkbase">
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_FormN1aAbstract" xlink:label="FormN1aAbstract" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusTable" xlink:label="ProspectusTable" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="FormN1aAbstract" xlink:to="ProspectusTable" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="DocumentInformationDocumentAxis" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentDomain" xlink:label="DocumentDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="DocumentInformationDocumentAxis" xlink:to="DocumentDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="CoregistrantAxis" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AllCoregistrantsMember" xlink:label="AllCoregistrantsMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="CoregistrantAxis" xlink:to="AllCoregistrantsMember" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="LegalEntityAxis" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityDomain" xlink:label="EntityDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="EntityDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusLineItems" xlink:label="ProspectusLineItems" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ProspectusLineItems" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_RiskReturnHeading" xlink:label="RiskReturnHeading" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="RiskReturnHeading" use="optional" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ObjectiveHeading" xlink:label="ObjectiveHeading" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ObjectiveHeading" use="optional" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ObjectivePrimaryTextBlock" xlink:label="ObjectivePrimaryTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ObjectivePrimaryTextBlock" use="optional" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ObjectiveSecondaryTextBlock" xlink:label="ObjectiveSecondaryTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ObjectiveSecondaryTextBlock" use="optional" order="4.0" priority="1" />
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/17/role/ShareholderFeesData" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:link="http://www.xbrl.org/2003/linkbase">
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusTable" xlink:label="ProspectusTable" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="DocumentInformationDocumentAxis" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentDomain" xlink:label="DocumentDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="DocumentInformationDocumentAxis" xlink:to="DocumentDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="CoregistrantAxis" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AllCoregistrantsMember" xlink:label="AllCoregistrantsMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="CoregistrantAxis" xlink:to="AllCoregistrantsMember" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="LegalEntityAxis" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityDomain" xlink:label="EntityDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="EntityDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusLineItems" xlink:label="ProspectusLineItems" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ProspectusLineItems" order="5.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ShareholderFeesColumnName" xlink:label="ShareholderFeesColumnName" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ShareholderFeesColumnName" use="optional" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_MaximumCumulativeSalesChargeOverOfferingPrice" xlink:label="MaximumCumulativeSalesChargeOverOfferingPrice" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="MaximumCumulativeSalesChargeOverOfferingPrice" use="optional" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_MaximumCumulativeSalesChargeOverOther" xlink:label="MaximumCumulativeSalesChargeOverOther" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="MaximumCumulativeSalesChargeOverOther" use="optional" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice" xlink:label="MaximumSalesChargeImposedOnPurchasesOverOfferingPrice" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="MaximumSalesChargeImposedOnPurchasesOverOfferingPrice" use="optional" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_MaximumDeferredSalesChargeOverOfferingPrice" xlink:label="MaximumDeferredSalesChargeOverOfferingPrice" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="MaximumDeferredSalesChargeOverOfferingPrice" use="optional" order="5.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_MaximumDeferredSalesChargeOverOther" xlink:label="MaximumDeferredSalesChargeOverOther" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="MaximumDeferredSalesChargeOverOther" use="optional" order="6.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther" xlink:label="MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther" use="optional" order="7.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_RedemptionFeeOverRedemption" xlink:label="RedemptionFeeOverRedemption" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="RedemptionFeeOverRedemption" use="optional" order="8.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_RedemptionFee" xlink:label="RedemptionFee" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="RedemptionFee" use="optional" order="9.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExchangeFeeOverRedemption" xlink:label="ExchangeFeeOverRedemption" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExchangeFeeOverRedemption" use="optional" order="10.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExchangeFee" xlink:label="ExchangeFee" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExchangeFee" use="optional" order="11.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_MaximumAccountFeeOverAssets" xlink:label="MaximumAccountFeeOverAssets" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="MaximumAccountFeeOverAssets" use="optional" order="12.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_MaximumAccountFee" xlink:label="MaximumAccountFee" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="MaximumAccountFee" use="optional" order="13.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ShareholderFeeOther" xlink:label="ShareholderFeeOther" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ShareholderFeeOther" use="optional" order="14.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ClassAxis" xlink:label="ClassAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ClassAxis" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ShareClassDomain" xlink:label="ShareClassDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="ShareClassDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ShareholderFeesAbstract" xlink:label="ShareholderFeesAbstract" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ShareholderFeesAbstract" xlink:to="ProspectusTable" order="1.0" priority="1" />
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/17/role/OperatingExpensesData" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:link="http://www.xbrl.org/2003/linkbase">
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_FormN1aAbstract" xlink:label="FormN1aAbstract" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusTable" xlink:label="ProspectusTable" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="FormN1aAbstract" xlink:to="ProspectusTable" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="DocumentInformationDocumentAxis" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentDomain" xlink:label="DocumentDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="DocumentInformationDocumentAxis" xlink:to="DocumentDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="CoregistrantAxis" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AllCoregistrantsMember" xlink:label="AllCoregistrantsMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="CoregistrantAxis" xlink:to="AllCoregistrantsMember" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="LegalEntityAxis" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityDomain" xlink:label="EntityDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="EntityDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusLineItems" xlink:label="ProspectusLineItems" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ProspectusLineItems" order="5.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_OperatingExpensesColumnName" xlink:label="OperatingExpensesColumnName" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="OperatingExpensesColumnName" use="optional" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ManagementFeesOverAssets" xlink:label="ManagementFeesOverAssets" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ManagementFeesOverAssets" use="optional" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_DistributionAndService12b1FeesOverAssets" xlink:label="DistributionAndService12b1FeesOverAssets" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="DistributionAndService12b1FeesOverAssets" use="optional" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_DistributionOrSimilarNon12b1FeesOverAssets" xlink:label="DistributionOrSimilarNon12b1FeesOverAssets" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="DistributionOrSimilarNon12b1FeesOverAssets" use="optional" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_Component1OtherExpensesOverAssets" xlink:label="Component1OtherExpensesOverAssets" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="Component1OtherExpensesOverAssets" use="optional" order="5.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_Component2OtherExpensesOverAssets" xlink:label="Component2OtherExpensesOverAssets" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="Component2OtherExpensesOverAssets" use="optional" order="6.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_Component3OtherExpensesOverAssets" xlink:label="Component3OtherExpensesOverAssets" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="Component3OtherExpensesOverAssets" use="optional" order="7.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_OtherExpensesOverAssets" xlink:label="OtherExpensesOverAssets" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="OtherExpensesOverAssets" use="optional" order="8.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AcquiredFundFeesAndExpensesOverAssets" xlink:label="AcquiredFundFeesAndExpensesOverAssets" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="AcquiredFundFeesAndExpensesOverAssets" use="optional" order="9.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpensesOverAssets" xlink:label="ExpensesOverAssets" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpensesOverAssets" use="optional" order="10.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_FeeWaiverOrReimbursementOverAssets" xlink:label="FeeWaiverOrReimbursementOverAssets" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="FeeWaiverOrReimbursementOverAssets" use="optional" order="11.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_NetExpensesOverAssets" xlink:label="NetExpensesOverAssets" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="NetExpensesOverAssets" use="optional" order="12.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_FeeWaiverOrReimbursementOverAssetsDateOfTermination" xlink:label="FeeWaiverOrReimbursementOverAssetsDateOfTermination" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="FeeWaiverOrReimbursementOverAssetsDateOfTermination" order="13.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ClassAxis" xlink:label="ClassAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ClassAxis" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ShareClassDomain" xlink:label="ShareClassDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="ShareClassDomain" order="1.0" priority="1" />
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/17/role/ExpenseExample" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:link="http://www.xbrl.org/2003/linkbase">
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusTable" xlink:label="ProspectusTable" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="DocumentInformationDocumentAxis" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentDomain" xlink:label="DocumentDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="DocumentInformationDocumentAxis" xlink:to="DocumentDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="CoregistrantAxis" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AllCoregistrantsMember" xlink:label="AllCoregistrantsMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="CoregistrantAxis" xlink:to="AllCoregistrantsMember" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="LegalEntityAxis" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityDomain" xlink:label="EntityDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="EntityDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusLineItems" xlink:label="ProspectusLineItems" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ProspectusLineItems" order="5.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleByYearColumnName" xlink:label="ExpenseExampleByYearColumnName" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleByYearColumnName" use="optional" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleYear01" xlink:label="ExpenseExampleYear01" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleYear01" use="optional" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleYear03" xlink:label="ExpenseExampleYear03" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleYear03" use="optional" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleYear05" xlink:label="ExpenseExampleYear05" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleYear05" use="optional" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleYear10" xlink:label="ExpenseExampleYear10" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleYear10" use="optional" order="5.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ClassAxis" xlink:label="ClassAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ClassAxis" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ShareClassDomain" xlink:label="ShareClassDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="ShareClassDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleAbstract" xlink:label="ExpenseExampleAbstract" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ExpenseExampleAbstract" xlink:to="ProspectusTable" order="1.0" priority="1" />
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/17/role/ExpenseExampleNoRedemption" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:link="http://www.xbrl.org/2003/linkbase">
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusTable" xlink:label="ProspectusTable" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="DocumentInformationDocumentAxis" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentDomain" xlink:label="DocumentDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="DocumentInformationDocumentAxis" xlink:to="DocumentDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="CoregistrantAxis" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AllCoregistrantsMember" xlink:label="AllCoregistrantsMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="CoregistrantAxis" xlink:to="AllCoregistrantsMember" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="LegalEntityAxis" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityDomain" xlink:label="EntityDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="EntityDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusLineItems" xlink:label="ProspectusLineItems" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ProspectusLineItems" order="5.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleNoRedemptionByYearColumnName" xlink:label="ExpenseExampleNoRedemptionByYearColumnName" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleNoRedemptionByYearColumnName" use="optional" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleNoRedemptionYear01" xlink:label="ExpenseExampleNoRedemptionYear01" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleNoRedemptionYear01" use="optional" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleNoRedemptionYear03" xlink:label="ExpenseExampleNoRedemptionYear03" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleNoRedemptionYear03" use="optional" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleNoRedemptionYear05" xlink:label="ExpenseExampleNoRedemptionYear05" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleNoRedemptionYear05" use="optional" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleNoRedemptionYear10" xlink:label="ExpenseExampleNoRedemptionYear10" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleNoRedemptionYear10" use="optional" order="5.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ClassAxis" xlink:label="ClassAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ClassAxis" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ShareClassDomain" xlink:label="ShareClassDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="ShareClassDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleNoRedemptionAbstract" xlink:label="ExpenseExampleNoRedemptionAbstract" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ExpenseExampleNoRedemptionAbstract" xlink:to="ProspectusTable" order="1.0" priority="1" />
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/17/role/BarChartData" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:link="http://www.xbrl.org/2003/linkbase">
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusTable" xlink:label="ProspectusTable" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="DocumentInformationDocumentAxis" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentDomain" xlink:label="DocumentDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="DocumentInformationDocumentAxis" xlink:to="DocumentDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="CoregistrantAxis" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AllCoregistrantsMember" xlink:label="AllCoregistrantsMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="CoregistrantAxis" xlink:to="AllCoregistrantsMember" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="LegalEntityAxis" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityDomain" xlink:label="EntityDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="EntityDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusLineItems" xlink:label="ProspectusLineItems" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ProspectusLineItems" order="5.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AnnualReturnCaption" xlink:label="AnnualReturnCaption" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="AnnualReturnCaption" use="optional" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AnnualReturnColumnName" xlink:label="AnnualReturnColumnName" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="AnnualReturnColumnName" use="optional" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AnnualReturnInceptionDate" xlink:label="AnnualReturnInceptionDate" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="AnnualReturnInceptionDate" use="optional" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AnnlRtrPct" xlink:label="AnnlRtrPct" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="AnnlRtrPct" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ClassAxis" xlink:label="ClassAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ClassAxis" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ShareClassDomain" xlink:label="ShareClassDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="ShareClassDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_BarChartTableAbstract" xlink:label="BarChartTableAbstract" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="BarChartTableAbstract" xlink:to="ProspectusTable" order="1.0" priority="1" />
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/17/role/PerformanceTableData" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:link="http://www.xbrl.org/2003/linkbase">
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusTable" xlink:label="ProspectusTable" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="DocumentInformationDocumentAxis" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentDomain" xlink:label="DocumentDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="DocumentInformationDocumentAxis" xlink:to="DocumentDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="CoregistrantAxis" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AllCoregistrantsMember" xlink:label="AllCoregistrantsMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="CoregistrantAxis" xlink:to="AllCoregistrantsMember" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusLineItems" xlink:label="ProspectusLineItems" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ProspectusLineItems" order="5.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AverageAnnualReturnLabel" xlink:label="AverageAnnualReturnLabel" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="AverageAnnualReturnLabel" use="optional" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AvgAnnlRtrPct" xlink:label="AvgAnnlRtrPct" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="AvgAnnlRtrPct" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerfInceptionDate" xlink:label="PerfInceptionDate" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerfInceptionDate" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ClassAxis" xlink:label="ClassAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ClassAxis" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ShareClassDomain" xlink:label="ShareClassDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="ShareClassDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceMeasureAxis" xlink:label="PerformanceMeasureAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="PerformanceMeasureAxis" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceMeasureDomain" xlink:label="PerformanceMeasureDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="PerformanceMeasureAxis" xlink:to="PerformanceMeasureDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AfterTaxesOnDistributionsMember" xlink:label="AfterTaxesOnDistributionsMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="PerformanceMeasureDomain" xlink:to="AfterTaxesOnDistributionsMember" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AfterTaxesOnDistributionsAndSalesMember" xlink:label="AfterTaxesOnDistributionsAndSalesMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="PerformanceMeasureDomain" xlink:to="AfterTaxesOnDistributionsAndSalesMember" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AverageAnnualReturnAbstract" xlink:label="AverageAnnualReturnAbstract" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="AverageAnnualReturnAbstract" xlink:to="ProspectusTable" order="1.0" priority="1" />
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/17/role/N1aCover" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:link="http://www.xbrl.org/2003/linkbase">
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_FormN1aAbstract" xlink:label="FormN1aAbstract" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusTable" xlink:label="ProspectusTable" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="FormN1aAbstract" xlink:to="ProspectusTable" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="DocumentInformationDocumentAxis" use="optional" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentDomain" xlink:label="DocumentDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="DocumentInformationDocumentAxis" xlink:to="DocumentDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="CoregistrantAxis" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AllCoregistrantsMember" xlink:label="AllCoregistrantsMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="CoregistrantAxis" xlink:to="AllCoregistrantsMember" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusLineItems" xlink:label="ProspectusLineItems" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ProspectusLineItems" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentType" xlink:label="DocumentType" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="DocumentType" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_AmendmentFlag" xlink:label="AmendmentFlag" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="AmendmentFlag" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_AmendmentDescription" xlink:label="AmendmentDescription" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="AmendmentDescription" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityRegistrantName" xlink:label="EntityRegistrantName" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="EntityRegistrantName" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityCentralIndexKey" xlink:label="EntityCentralIndexKey" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="EntityCentralIndexKey" order="5.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityInvCompanyType" xlink:label="EntityInvCompanyType" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="EntityInvCompanyType" order="6.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentPeriodEndDate" xlink:label="DocumentPeriodEndDate" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="DocumentPeriodEndDate" order="7.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusDate" xlink:label="ProspectusDate" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ProspectusDate" order="8.0" priority="1" />
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/17/role/PerformanceManagement" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:link="http://www.xbrl.org/2003/linkbase">
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_FormN1aAbstract" xlink:label="FormN1aAbstract" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusTable" xlink:label="ProspectusTable" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="FormN1aAbstract" xlink:to="ProspectusTable" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="DocumentInformationDocumentAxis" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentDomain" xlink:label="DocumentDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="DocumentInformationDocumentAxis" xlink:to="DocumentDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="CoregistrantAxis" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AllCoregistrantsMember" xlink:label="AllCoregistrantsMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="CoregistrantAxis" xlink:to="AllCoregistrantsMember" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="LegalEntityAxis" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityDomain" xlink:label="EntityDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="EntityDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusLineItems" xlink:label="ProspectusLineItems" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ProspectusLineItems" order="5.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_BarChartAndPerformanceTableHeading" xlink:label="BarChartAndPerformanceTableHeading" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="BarChartAndPerformanceTableHeading" use="optional" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceNarrativeTextBlock" xlink:label="PerformanceNarrativeTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformanceNarrativeTextBlock" use="optional" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_BarChartNarrativeTextBlock" xlink:label="BarChartNarrativeTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="BarChartNarrativeTextBlock" use="optional" order="7.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_BarChartHeading" xlink:label="BarChartHeading" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="BarChartHeading" use="optional" order="11.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_BarChartFootnotesTextBlock" xlink:label="BarChartFootnotesTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="BarChartFootnotesTextBlock" use="optional" order="13.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_BarChartClosingTextBlock" xlink:label="BarChartClosingTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="BarChartClosingTextBlock" use="optional" order="14.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceTableHeading" xlink:label="PerformanceTableHeading" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformanceTableHeading" use="optional" order="24.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceTableNarrativeTextBlock" xlink:label="PerformanceTableNarrativeTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformanceTableNarrativeTextBlock" use="optional" order="25.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceTableClosingTextBlock" xlink:label="PerformanceTableClosingTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformanceTableClosingTextBlock" use="optional" order="39.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_BarChartTableTextBlock" xlink:label="BarChartTableTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="BarChartTableTextBlock" use="optional" order="12.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceTableTextBlock" xlink:label="PerformanceTableTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformanceTableTextBlock" use="optional" order="31.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_MarketIndexPerformanceTableTextBlock" xlink:label="MarketIndexPerformanceTableTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="MarketIndexPerformanceTableTextBlock" use="optional" order="34.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_MoneyMarketSevenDayYieldCaption" xlink:label="MoneyMarketSevenDayYieldCaption" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="MoneyMarketSevenDayYieldCaption" order="40.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_MoneyMarketSevenDayYieldColumnName" xlink:label="MoneyMarketSevenDayYieldColumnName" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="MoneyMarketSevenDayYieldColumnName" order="41.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_MoneyMarketSevenDayYieldPhone" xlink:label="MoneyMarketSevenDayYieldPhone" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="MoneyMarketSevenDayYieldPhone" order="42.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_MoneyMarketSevenDayYield" xlink:label="MoneyMarketSevenDayYield" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="MoneyMarketSevenDayYield" order="43.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_MoneyMarketSevenDayTaxEquivalentYield" xlink:label="MoneyMarketSevenDayTaxEquivalentYield" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="MoneyMarketSevenDayTaxEquivalentYield" order="44.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ThirtyDayYieldCaption" xlink:label="ThirtyDayYieldCaption" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ThirtyDayYieldCaption" order="45.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ThirtyDayYieldColumnName" xlink:label="ThirtyDayYieldColumnName" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ThirtyDayYieldColumnName" order="46.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ThirtyDayYieldPhone" xlink:label="ThirtyDayYieldPhone" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ThirtyDayYieldPhone" order="47.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ThirtyDayYield" xlink:label="ThirtyDayYield" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ThirtyDayYield" order="48.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ThirtyDayTaxEquivalentYield" xlink:label="ThirtyDayTaxEquivalentYield" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ThirtyDayTaxEquivalentYield" order="49.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceAvailabilityWebSiteAddress" xlink:label="PerformanceAvailabilityWebSiteAddress" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformanceAvailabilityWebSiteAddress" order="50.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceAvailabilityPhone" xlink:label="PerformanceAvailabilityPhone" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformanceAvailabilityPhone" order="51.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceTableFootnotesTextBlock" xlink:label="PerformanceTableFootnotesTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformanceTableFootnotesTextBlock" use="optional" order="35.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceTableFootnotesReasonPerformanceInformationForClassDifferentFromImmediatelyPrecedingPeriod" xlink:label="PerformanceTableFootnotesReasonPerformanceInformationForClassDifferentFromImmediatelyPrecedingPeriod" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformanceTableFootnotesReasonPerformanceInformationForClassDifferentFromImmediatelyPrecedingPeriod" order="36.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceTableOneClassOfAfterTaxShown" xlink:label="PerformanceTableOneClassOfAfterTaxShown" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformanceTableOneClassOfAfterTaxShown" order="37.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_IndexNoDeductionForFeesExpensesTaxes" xlink:label="IndexNoDeductionForFeesExpensesTaxes" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="IndexNoDeductionForFeesExpensesTaxes" order="38.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AverageAnnualReturnCaption" xlink:label="AverageAnnualReturnCaption" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="AverageAnnualReturnCaption" order="32.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AverageAnnualReturnColumnName" xlink:label="AverageAnnualReturnColumnName" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="AverageAnnualReturnColumnName" order="33.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceTableDoesReflectSalesLoads" xlink:label="PerformanceTableDoesReflectSalesLoads" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformanceTableDoesReflectSalesLoads" order="26.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceTableMarketIndexChanged" xlink:label="PerformanceTableMarketIndexChanged" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformanceTableMarketIndexChanged" order="27.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceTableUsesHighestFederalRate" xlink:label="PerformanceTableUsesHighestFederalRate" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformanceTableUsesHighestFederalRate" order="28.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceTableNotRelevantToTaxDeferred" xlink:label="PerformanceTableNotRelevantToTaxDeferred" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformanceTableNotRelevantToTaxDeferred" order="29.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceTableExplanationAfterTaxHigher" xlink:label="PerformanceTableExplanationAfterTaxHigher" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformanceTableExplanationAfterTaxHigher" order="30.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_YearToDateReturnLabel" xlink:label="YearToDateReturnLabel" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="YearToDateReturnLabel" order="15.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_BarChartYearToDateReturn" xlink:label="BarChartYearToDateReturn" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="BarChartYearToDateReturn" order="16.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_BarChartYearToDateReturnDate" xlink:label="BarChartYearToDateReturnDate" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="BarChartYearToDateReturnDate" order="17.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_HighestQuarterlyReturnLabel" xlink:label="HighestQuarterlyReturnLabel" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="HighestQuarterlyReturnLabel" order="18.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_BarChartHighestQuarterlyReturn" xlink:label="BarChartHighestQuarterlyReturn" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="BarChartHighestQuarterlyReturn" order="19.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_BarChartHighestQuarterlyReturnDate" xlink:label="BarChartHighestQuarterlyReturnDate" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="BarChartHighestQuarterlyReturnDate" order="20.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_LowestQuarterlyReturnLabel" xlink:label="LowestQuarterlyReturnLabel" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="LowestQuarterlyReturnLabel" order="21.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_BarChartLowestQuarterlyReturn" xlink:label="BarChartLowestQuarterlyReturn" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="BarChartLowestQuarterlyReturn" order="22.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_BarChartLowestQuarterlyReturnDate" xlink:label="BarChartLowestQuarterlyReturnDate" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="BarChartLowestQuarterlyReturnDate" order="23.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_BarChartDoesNotReflectSalesLoads" xlink:label="BarChartDoesNotReflectSalesLoads" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="BarChartDoesNotReflectSalesLoads" order="8.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_BarChartReturnsForClassNotOfferedInProspectus" xlink:label="BarChartReturnsForClassNotOfferedInProspectus" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="BarChartReturnsForClassNotOfferedInProspectus" order="9.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_BarChartReasonSelectedClassDifferentFromImmediatelyPrecedingPeriod" xlink:label="BarChartReasonSelectedClassDifferentFromImmediatelyPrecedingPeriod" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="BarChartReasonSelectedClassDifferentFromImmediatelyPrecedingPeriod" order="10.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformancePastDoesNotIndicateFuture" xlink:label="PerformancePastDoesNotIndicateFuture" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformancePastDoesNotIndicateFuture" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceInformationIllustratesVariabilityOfReturns" xlink:label="PerformanceInformationIllustratesVariabilityOfReturns" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformanceInformationIllustratesVariabilityOfReturns" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceOneYearOrLess" xlink:label="PerformanceOneYearOrLess" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformanceOneYearOrLess" order="5.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceAdditionalMarketIndex" xlink:label="PerformanceAdditionalMarketIndex" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformanceAdditionalMarketIndex" order="6.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ClassAxis" xlink:label="ClassAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ClassAxis" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ShareClassDomain" xlink:label="ShareClassDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="ShareClassDomain" order="1.0" priority="1" />
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/17/role/InvestmentRisks" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:link="http://www.xbrl.org/2003/linkbase">
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusTable" xlink:label="ProspectusTable" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="DocumentInformationDocumentAxis" use="optional" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentDomain" xlink:label="DocumentDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="DocumentInformationDocumentAxis" xlink:to="DocumentDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="CoregistrantAxis" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AllCoregistrantsMember" xlink:label="AllCoregistrantsMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="CoregistrantAxis" xlink:to="AllCoregistrantsMember" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="LegalEntityAxis" use="optional" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityDomain" xlink:label="EntityDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="EntityDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusLineItems" xlink:label="ProspectusLineItems" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ProspectusLineItems" order="5.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_RiskTextBlock" xlink:label="RiskTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="RiskTextBlock" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_RiskAxis" xlink:label="RiskAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="RiskAxis" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AllRisksMember" xlink:label="AllRisksMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="RiskAxis" xlink:to="AllRisksMember" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_RiskLoseMoneyMember" xlink:label="RiskLoseMoneyMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="RiskAxis" xlink:to="RiskLoseMoneyMember" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_RiskNotInsuredDepositoryInstitutionMember" xlink:label="RiskNotInsuredDepositoryInstitutionMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="RiskAxis" xlink:to="RiskNotInsuredDepositoryInstitutionMember" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_RiskNotInsuredMember" xlink:label="RiskNotInsuredMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="RiskAxis" xlink:to="RiskNotInsuredMember" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_RiskNondiversifiedStatusMember" xlink:label="RiskNondiversifiedStatusMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="RiskAxis" xlink:to="RiskNondiversifiedStatusMember" order="5.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_RiskMoneyMarketFundPriceFluctuatesMember" xlink:label="RiskMoneyMarketFundPriceFluctuatesMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="RiskAxis" xlink:to="RiskMoneyMarketFundPriceFluctuatesMember" order="6.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_RiskMoneyMarketFundMayImposeFeesOrSuspendSalesMember" xlink:label="RiskMoneyMarketFundMayImposeFeesOrSuspendSalesMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="RiskAxis" xlink:to="RiskMoneyMarketFundMayImposeFeesOrSuspendSalesMember" order="7.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_RiskMoneyMarketFundMayNotPreserveDollarMember" xlink:label="RiskMoneyMarketFundMayNotPreserveDollarMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="RiskAxis" xlink:to="RiskMoneyMarketFundMayNotPreserveDollarMember" order="8.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_RiskMoneyMarketFundSponsorMayNotProvideSupportMember" xlink:label="RiskMoneyMarketFundSponsorMayNotProvideSupportMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="RiskAxis" xlink:to="RiskMoneyMarketFundSponsorMayNotProvideSupportMember" order="9.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_RisksAbstract" xlink:label="RisksAbstract" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="RisksAbstract" xlink:to="ProspectusTable" use="optional" order="1.0" priority="1" />
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/17/role/InvestmentStrategy" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:link="http://www.xbrl.org/2003/linkbase">
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_FormN1aAbstract" xlink:label="FormN1aAbstract" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusTable" xlink:label="ProspectusTable" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="FormN1aAbstract" xlink:to="ProspectusTable" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="DocumentInformationDocumentAxis" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentDomain" xlink:label="DocumentDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="DocumentInformationDocumentAxis" xlink:to="DocumentDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="CoregistrantAxis" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AllCoregistrantsMember" xlink:label="AllCoregistrantsMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="CoregistrantAxis" xlink:to="AllCoregistrantsMember" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="LegalEntityAxis" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityDomain" xlink:label="EntityDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="EntityDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusLineItems" xlink:label="ProspectusLineItems" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ProspectusLineItems" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_StrategyHeading" xlink:label="StrategyHeading" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="StrategyHeading" use="optional" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_StrategyNarrativeTextBlock" xlink:label="StrategyNarrativeTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="StrategyNarrativeTextBlock" use="optional" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_StrategyPortfolioConcentration" xlink:label="StrategyPortfolioConcentration" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="StrategyPortfolioConcentration" order="3.0" priority="1" />
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/17/role/FeesAndExpenses" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:link="http://www.xbrl.org/2003/linkbase">
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_FormN1aAbstract" xlink:label="FormN1aAbstract" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusTable" xlink:label="ProspectusTable" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="FormN1aAbstract" xlink:to="ProspectusTable" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="DocumentInformationDocumentAxis" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentDomain" xlink:label="DocumentDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="DocumentInformationDocumentAxis" xlink:to="DocumentDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="CoregistrantAxis" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AllCoregistrantsMember" xlink:label="AllCoregistrantsMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="CoregistrantAxis" xlink:to="AllCoregistrantsMember" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="LegalEntityAxis" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityDomain" xlink:label="EntityDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="EntityDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusLineItems" xlink:label="ProspectusLineItems" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ProspectusLineItems" order="5.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseHeading" xlink:label="ExpenseHeading" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseHeading" use="optional" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseNarrativeTextBlock" xlink:label="ExpenseNarrativeTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseNarrativeTextBlock" use="optional" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ShareholderFeesCaption" xlink:label="ShareholderFeesCaption" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ShareholderFeesCaption" use="optional" order="11.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_OperatingExpensesCaption" xlink:label="OperatingExpensesCaption" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="OperatingExpensesCaption" use="optional" order="13.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseFootnotesTextBlock" xlink:label="ExpenseFootnotesTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseFootnotesTextBlock" use="optional" order="15.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpensesDeferredChargesTextBlock" xlink:label="ExpensesDeferredChargesTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpensesDeferredChargesTextBlock" use="optional" order="16.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpensesRangeOfExchangeFeesTextBlock" xlink:label="ExpensesRangeOfExchangeFeesTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpensesRangeOfExchangeFeesTextBlock" use="optional" order="17.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleHeading" xlink:label="ExpenseExampleHeading" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleHeading" use="optional" order="18.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleByYearHeading" xlink:label="ExpenseExampleByYearHeading" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleByYearHeading" use="optional" order="19.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleNarrativeTextBlock" xlink:label="ExpenseExampleNarrativeTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleNarrativeTextBlock" use="optional" order="20.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleByYearCaption" xlink:label="ExpenseExampleByYearCaption" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleByYearCaption" use="optional" order="21.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleNoRedemptionNarrativeTextBlock" xlink:label="ExpenseExampleNoRedemptionNarrativeTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleNoRedemptionNarrativeTextBlock" use="optional" order="23.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleNoRedemptionByYearCaption" xlink:label="ExpenseExampleNoRedemptionByYearCaption" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleNoRedemptionByYearCaption" use="optional" order="24.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleFootnotesTextBlock" xlink:label="ExpenseExampleFootnotesTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleFootnotesTextBlock" use="optional" order="26.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleClosingTextBlock" xlink:label="ExpenseExampleClosingTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleClosingTextBlock" use="optional" order="27.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PortfolioTurnoverHeading" xlink:label="PortfolioTurnoverHeading" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PortfolioTurnoverHeading" use="optional" order="28.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PortfolioTurnoverTextBlock" xlink:label="PortfolioTurnoverTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PortfolioTurnoverTextBlock" use="optional" order="29.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ShareholderFeesTableTextBlock" xlink:label="ShareholderFeesTableTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ShareholderFeesTableTextBlock" use="optional" order="12.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AnnualFundOperatingExpensesTableTextBlock" xlink:label="AnnualFundOperatingExpensesTableTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="AnnualFundOperatingExpensesTableTextBlock" use="optional" order="14.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleWithRedemptionTableTextBlock" xlink:label="ExpenseExampleWithRedemptionTableTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleWithRedemptionTableTextBlock" use="optional" order="22.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleNoRedemptionTableTextBlock" xlink:label="ExpenseExampleNoRedemptionTableTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleNoRedemptionTableTextBlock" use="optional" order="25.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PortfolioTurnoverRate" xlink:label="PortfolioTurnoverRate" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PortfolioTurnoverRate" order="30.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseBreakpointDiscounts" xlink:label="ExpenseBreakpointDiscounts" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseBreakpointDiscounts" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpensesOtherExpensesHadExtraordinaryExpensesBeenIncluded" xlink:label="ExpensesOtherExpensesHadExtraordinaryExpensesBeenIncluded" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpensesOtherExpensesHadExtraordinaryExpensesBeenIncluded" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpensesRestatedToReflectCurrent" xlink:label="ExpensesRestatedToReflectCurrent" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpensesRestatedToReflectCurrent" order="5.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseBreakpointMinimumInvestmentRequiredAmount" xlink:label="ExpenseBreakpointMinimumInvestmentRequiredAmount" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseBreakpointMinimumInvestmentRequiredAmount" order="6.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_OtherExpensesNewFundBasedOnEstimates" xlink:label="OtherExpensesNewFundBasedOnEstimates" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="OtherExpensesNewFundBasedOnEstimates" order="7.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AcquiredFundFeesAndExpensesBasedOnEstimates" xlink:label="AcquiredFundFeesAndExpensesBasedOnEstimates" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="AcquiredFundFeesAndExpensesBasedOnEstimates" order="8.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpensesNotCorrelatedToRatioDueToAcquiredFundFees" xlink:label="ExpensesNotCorrelatedToRatioDueToAcquiredFundFees" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpensesNotCorrelatedToRatioDueToAcquiredFundFees" order="9.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpensesExplanationOfNonrecurringAccountFee" xlink:label="ExpensesExplanationOfNonrecurringAccountFee" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpensesExplanationOfNonrecurringAccountFee" order="10.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ClassAxis" xlink:label="ClassAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ClassAxis" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ShareClassDomain" xlink:label="ShareClassDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="ShareClassDomain" order="1.0" priority="1" />
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/17/role/N1aSupplement" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:link="http://www.xbrl.org/2003/linkbase">
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_FormN1aAbstract" xlink:label="FormN1aAbstract" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusTable" xlink:label="ProspectusTable" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="FormN1aAbstract" xlink:to="ProspectusTable" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="DocumentInformationDocumentAxis" use="optional" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentDomain" xlink:label="DocumentDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="DocumentInformationDocumentAxis" xlink:to="DocumentDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="CoregistrantAxis" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AllCoregistrantsMember" xlink:label="AllCoregistrantsMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="CoregistrantAxis" xlink:to="AllCoregistrantsMember" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="LegalEntityAxis" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityDomain" xlink:label="EntityDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="EntityDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusLineItems" xlink:label="ProspectusLineItems" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ProspectusLineItems" order="5.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_SupplementToProspectusTextBlock" xlink:label="SupplementToProspectusTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="SupplementToProspectusTextBlock" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ClassAxis" xlink:label="ClassAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ClassAxis" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ShareClassDomain" xlink:label="ShareClassDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="ShareClassDomain" order="1.0" priority="1" />
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/18/role/RiskReturn" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:link="http://www.xbrl.org/2003/linkbase">
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_FormN1aAbstract" xlink:label="FormN1aAbstract" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusTable" xlink:label="ProspectusTable" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="FormN1aAbstract" xlink:to="ProspectusTable" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="DocumentInformationDocumentAxis" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentDomain" xlink:label="DocumentDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="DocumentInformationDocumentAxis" xlink:to="DocumentDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="CoregistrantAxis" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AllCoregistrantsMember" xlink:label="AllCoregistrantsMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="CoregistrantAxis" xlink:to="AllCoregistrantsMember" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="LegalEntityAxis" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityDomain" xlink:label="EntityDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="EntityDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusLineItems" xlink:label="ProspectusLineItems" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ProspectusLineItems" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_RiskReturnHeading" xlink:label="RiskReturnHeading" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="RiskReturnHeading" use="optional" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ObjectiveHeading" xlink:label="ObjectiveHeading" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ObjectiveHeading" use="optional" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ObjectivePrimaryTextBlock" xlink:label="ObjectivePrimaryTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ObjectivePrimaryTextBlock" use="optional" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ObjectiveSecondaryTextBlock" xlink:label="ObjectiveSecondaryTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ObjectiveSecondaryTextBlock" use="optional" order="4.0" priority="1" />
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/18/role/ShareholderFeesData" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:link="http://www.xbrl.org/2003/linkbase">
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusTable" xlink:label="ProspectusTable" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="DocumentInformationDocumentAxis" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentDomain" xlink:label="DocumentDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="DocumentInformationDocumentAxis" xlink:to="DocumentDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="CoregistrantAxis" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AllCoregistrantsMember" xlink:label="AllCoregistrantsMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="CoregistrantAxis" xlink:to="AllCoregistrantsMember" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="LegalEntityAxis" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityDomain" xlink:label="EntityDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="EntityDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusLineItems" xlink:label="ProspectusLineItems" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ProspectusLineItems" order="5.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ShareholderFeesColumnName" xlink:label="ShareholderFeesColumnName" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ShareholderFeesColumnName" use="optional" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_MaximumCumulativeSalesChargeOverOfferingPrice" xlink:label="MaximumCumulativeSalesChargeOverOfferingPrice" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="MaximumCumulativeSalesChargeOverOfferingPrice" use="optional" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_MaximumCumulativeSalesChargeOverOther" xlink:label="MaximumCumulativeSalesChargeOverOther" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="MaximumCumulativeSalesChargeOverOther" use="optional" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice" xlink:label="MaximumSalesChargeImposedOnPurchasesOverOfferingPrice" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="MaximumSalesChargeImposedOnPurchasesOverOfferingPrice" use="optional" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_MaximumDeferredSalesChargeOverOfferingPrice" xlink:label="MaximumDeferredSalesChargeOverOfferingPrice" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="MaximumDeferredSalesChargeOverOfferingPrice" use="optional" order="5.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_MaximumDeferredSalesChargeOverOther" xlink:label="MaximumDeferredSalesChargeOverOther" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="MaximumDeferredSalesChargeOverOther" use="optional" order="6.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther" xlink:label="MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther" use="optional" order="7.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_RedemptionFeeOverRedemption" xlink:label="RedemptionFeeOverRedemption" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="RedemptionFeeOverRedemption" use="optional" order="8.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_RedemptionFee" xlink:label="RedemptionFee" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="RedemptionFee" use="optional" order="9.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExchangeFeeOverRedemption" xlink:label="ExchangeFeeOverRedemption" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExchangeFeeOverRedemption" use="optional" order="10.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExchangeFee" xlink:label="ExchangeFee" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExchangeFee" use="optional" order="11.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_MaximumAccountFeeOverAssets" xlink:label="MaximumAccountFeeOverAssets" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="MaximumAccountFeeOverAssets" use="optional" order="12.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_MaximumAccountFee" xlink:label="MaximumAccountFee" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="MaximumAccountFee" use="optional" order="13.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ShareholderFeeOther" xlink:label="ShareholderFeeOther" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ShareholderFeeOther" use="optional" order="14.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ClassAxis" xlink:label="ClassAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ClassAxis" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ShareClassDomain" xlink:label="ShareClassDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="ShareClassDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ShareholderFeesAbstract" xlink:label="ShareholderFeesAbstract" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ShareholderFeesAbstract" xlink:to="ProspectusTable" order="1.0" priority="1" />
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/18/role/OperatingExpensesData" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:link="http://www.xbrl.org/2003/linkbase">
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_FormN1aAbstract" xlink:label="FormN1aAbstract" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusTable" xlink:label="ProspectusTable" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="FormN1aAbstract" xlink:to="ProspectusTable" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="DocumentInformationDocumentAxis" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentDomain" xlink:label="DocumentDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="DocumentInformationDocumentAxis" xlink:to="DocumentDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="CoregistrantAxis" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AllCoregistrantsMember" xlink:label="AllCoregistrantsMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="CoregistrantAxis" xlink:to="AllCoregistrantsMember" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="LegalEntityAxis" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityDomain" xlink:label="EntityDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="EntityDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusLineItems" xlink:label="ProspectusLineItems" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ProspectusLineItems" order="5.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_OperatingExpensesColumnName" xlink:label="OperatingExpensesColumnName" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="OperatingExpensesColumnName" use="optional" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ManagementFeesOverAssets" xlink:label="ManagementFeesOverAssets" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ManagementFeesOverAssets" use="optional" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_DistributionAndService12b1FeesOverAssets" xlink:label="DistributionAndService12b1FeesOverAssets" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="DistributionAndService12b1FeesOverAssets" use="optional" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_DistributionOrSimilarNon12b1FeesOverAssets" xlink:label="DistributionOrSimilarNon12b1FeesOverAssets" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="DistributionOrSimilarNon12b1FeesOverAssets" use="optional" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_Component1OtherExpensesOverAssets" xlink:label="Component1OtherExpensesOverAssets" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="Component1OtherExpensesOverAssets" use="optional" order="5.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_Component2OtherExpensesOverAssets" xlink:label="Component2OtherExpensesOverAssets" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="Component2OtherExpensesOverAssets" use="optional" order="6.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_Component3OtherExpensesOverAssets" xlink:label="Component3OtherExpensesOverAssets" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="Component3OtherExpensesOverAssets" use="optional" order="7.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_OtherExpensesOverAssets" xlink:label="OtherExpensesOverAssets" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="OtherExpensesOverAssets" use="optional" order="8.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AcquiredFundFeesAndExpensesOverAssets" xlink:label="AcquiredFundFeesAndExpensesOverAssets" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="AcquiredFundFeesAndExpensesOverAssets" use="optional" order="9.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpensesOverAssets" xlink:label="ExpensesOverAssets" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpensesOverAssets" use="optional" order="10.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_FeeWaiverOrReimbursementOverAssets" xlink:label="FeeWaiverOrReimbursementOverAssets" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="FeeWaiverOrReimbursementOverAssets" use="optional" order="11.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_NetExpensesOverAssets" xlink:label="NetExpensesOverAssets" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="NetExpensesOverAssets" use="optional" order="12.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_FeeWaiverOrReimbursementOverAssetsDateOfTermination" xlink:label="FeeWaiverOrReimbursementOverAssetsDateOfTermination" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="FeeWaiverOrReimbursementOverAssetsDateOfTermination" order="13.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ClassAxis" xlink:label="ClassAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ClassAxis" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ShareClassDomain" xlink:label="ShareClassDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="ShareClassDomain" order="1.0" priority="1" />
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/18/role/ExpenseExample" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:link="http://www.xbrl.org/2003/linkbase">
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusTable" xlink:label="ProspectusTable" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="DocumentInformationDocumentAxis" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentDomain" xlink:label="DocumentDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="DocumentInformationDocumentAxis" xlink:to="DocumentDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="CoregistrantAxis" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AllCoregistrantsMember" xlink:label="AllCoregistrantsMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="CoregistrantAxis" xlink:to="AllCoregistrantsMember" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="LegalEntityAxis" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityDomain" xlink:label="EntityDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="EntityDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusLineItems" xlink:label="ProspectusLineItems" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ProspectusLineItems" order="5.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleByYearColumnName" xlink:label="ExpenseExampleByYearColumnName" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleByYearColumnName" use="optional" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleYear01" xlink:label="ExpenseExampleYear01" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleYear01" use="optional" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleYear03" xlink:label="ExpenseExampleYear03" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleYear03" use="optional" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleYear05" xlink:label="ExpenseExampleYear05" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleYear05" use="optional" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleYear10" xlink:label="ExpenseExampleYear10" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleYear10" use="optional" order="5.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ClassAxis" xlink:label="ClassAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ClassAxis" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ShareClassDomain" xlink:label="ShareClassDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="ShareClassDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleAbstract" xlink:label="ExpenseExampleAbstract" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ExpenseExampleAbstract" xlink:to="ProspectusTable" order="1.0" priority="1" />
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/18/role/ExpenseExampleNoRedemption" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:link="http://www.xbrl.org/2003/linkbase">
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusTable" xlink:label="ProspectusTable" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="DocumentInformationDocumentAxis" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentDomain" xlink:label="DocumentDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="DocumentInformationDocumentAxis" xlink:to="DocumentDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="CoregistrantAxis" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AllCoregistrantsMember" xlink:label="AllCoregistrantsMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="CoregistrantAxis" xlink:to="AllCoregistrantsMember" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="LegalEntityAxis" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityDomain" xlink:label="EntityDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="EntityDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusLineItems" xlink:label="ProspectusLineItems" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ProspectusLineItems" order="5.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleNoRedemptionByYearColumnName" xlink:label="ExpenseExampleNoRedemptionByYearColumnName" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleNoRedemptionByYearColumnName" use="optional" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleNoRedemptionYear01" xlink:label="ExpenseExampleNoRedemptionYear01" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleNoRedemptionYear01" use="optional" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleNoRedemptionYear03" xlink:label="ExpenseExampleNoRedemptionYear03" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleNoRedemptionYear03" use="optional" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleNoRedemptionYear05" xlink:label="ExpenseExampleNoRedemptionYear05" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleNoRedemptionYear05" use="optional" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleNoRedemptionYear10" xlink:label="ExpenseExampleNoRedemptionYear10" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleNoRedemptionYear10" use="optional" order="5.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ClassAxis" xlink:label="ClassAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ClassAxis" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ShareClassDomain" xlink:label="ShareClassDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="ShareClassDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleNoRedemptionAbstract" xlink:label="ExpenseExampleNoRedemptionAbstract" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ExpenseExampleNoRedemptionAbstract" xlink:to="ProspectusTable" order="1.0" priority="1" />
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/18/role/BarChartData" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:link="http://www.xbrl.org/2003/linkbase">
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusTable" xlink:label="ProspectusTable" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="DocumentInformationDocumentAxis" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentDomain" xlink:label="DocumentDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="DocumentInformationDocumentAxis" xlink:to="DocumentDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="CoregistrantAxis" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AllCoregistrantsMember" xlink:label="AllCoregistrantsMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="CoregistrantAxis" xlink:to="AllCoregistrantsMember" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="LegalEntityAxis" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityDomain" xlink:label="EntityDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="EntityDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusLineItems" xlink:label="ProspectusLineItems" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ProspectusLineItems" order="5.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AnnualReturnCaption" xlink:label="AnnualReturnCaption" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="AnnualReturnCaption" use="optional" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AnnualReturnColumnName" xlink:label="AnnualReturnColumnName" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="AnnualReturnColumnName" use="optional" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AnnualReturnInceptionDate" xlink:label="AnnualReturnInceptionDate" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="AnnualReturnInceptionDate" use="optional" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AnnlRtrPct" xlink:label="AnnlRtrPct" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="AnnlRtrPct" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ClassAxis" xlink:label="ClassAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ClassAxis" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ShareClassDomain" xlink:label="ShareClassDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="ShareClassDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_BarChartTableAbstract" xlink:label="BarChartTableAbstract" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="BarChartTableAbstract" xlink:to="ProspectusTable" order="1.0" priority="1" />
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/18/role/PerformanceTableData" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:link="http://www.xbrl.org/2003/linkbase">
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusTable" xlink:label="ProspectusTable" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="DocumentInformationDocumentAxis" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentDomain" xlink:label="DocumentDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="DocumentInformationDocumentAxis" xlink:to="DocumentDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="CoregistrantAxis" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AllCoregistrantsMember" xlink:label="AllCoregistrantsMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="CoregistrantAxis" xlink:to="AllCoregistrantsMember" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusLineItems" xlink:label="ProspectusLineItems" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ProspectusLineItems" order="5.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AverageAnnualReturnLabel" xlink:label="AverageAnnualReturnLabel" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="AverageAnnualReturnLabel" use="optional" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AvgAnnlRtrPct" xlink:label="AvgAnnlRtrPct" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="AvgAnnlRtrPct" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerfInceptionDate" xlink:label="PerfInceptionDate" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerfInceptionDate" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ClassAxis" xlink:label="ClassAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ClassAxis" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ShareClassDomain" xlink:label="ShareClassDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="ShareClassDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceMeasureAxis" xlink:label="PerformanceMeasureAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="PerformanceMeasureAxis" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceMeasureDomain" xlink:label="PerformanceMeasureDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="PerformanceMeasureAxis" xlink:to="PerformanceMeasureDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AfterTaxesOnDistributionsMember" xlink:label="AfterTaxesOnDistributionsMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="PerformanceMeasureDomain" xlink:to="AfterTaxesOnDistributionsMember" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AfterTaxesOnDistributionsAndSalesMember" xlink:label="AfterTaxesOnDistributionsAndSalesMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="PerformanceMeasureDomain" xlink:to="AfterTaxesOnDistributionsAndSalesMember" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AverageAnnualReturnAbstract" xlink:label="AverageAnnualReturnAbstract" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="AverageAnnualReturnAbstract" xlink:to="ProspectusTable" order="1.0" priority="1" />
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/18/role/N1aCover" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:link="http://www.xbrl.org/2003/linkbase">
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_FormN1aAbstract" xlink:label="FormN1aAbstract" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusTable" xlink:label="ProspectusTable" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="FormN1aAbstract" xlink:to="ProspectusTable" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="DocumentInformationDocumentAxis" use="optional" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentDomain" xlink:label="DocumentDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="DocumentInformationDocumentAxis" xlink:to="DocumentDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="CoregistrantAxis" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AllCoregistrantsMember" xlink:label="AllCoregistrantsMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="CoregistrantAxis" xlink:to="AllCoregistrantsMember" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusLineItems" xlink:label="ProspectusLineItems" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ProspectusLineItems" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentType" xlink:label="DocumentType" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="DocumentType" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_AmendmentFlag" xlink:label="AmendmentFlag" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="AmendmentFlag" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_AmendmentDescription" xlink:label="AmendmentDescription" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="AmendmentDescription" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityRegistrantName" xlink:label="EntityRegistrantName" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="EntityRegistrantName" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityCentralIndexKey" xlink:label="EntityCentralIndexKey" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="EntityCentralIndexKey" order="5.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityInvCompanyType" xlink:label="EntityInvCompanyType" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="EntityInvCompanyType" order="6.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentPeriodEndDate" xlink:label="DocumentPeriodEndDate" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="DocumentPeriodEndDate" order="7.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusDate" xlink:label="ProspectusDate" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ProspectusDate" order="8.0" priority="1" />
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/18/role/PerformanceManagement" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:link="http://www.xbrl.org/2003/linkbase">
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_FormN1aAbstract" xlink:label="FormN1aAbstract" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusTable" xlink:label="ProspectusTable" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="FormN1aAbstract" xlink:to="ProspectusTable" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="DocumentInformationDocumentAxis" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentDomain" xlink:label="DocumentDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="DocumentInformationDocumentAxis" xlink:to="DocumentDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="CoregistrantAxis" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AllCoregistrantsMember" xlink:label="AllCoregistrantsMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="CoregistrantAxis" xlink:to="AllCoregistrantsMember" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="LegalEntityAxis" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityDomain" xlink:label="EntityDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="EntityDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusLineItems" xlink:label="ProspectusLineItems" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ProspectusLineItems" order="5.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_BarChartAndPerformanceTableHeading" xlink:label="BarChartAndPerformanceTableHeading" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="BarChartAndPerformanceTableHeading" use="optional" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceNarrativeTextBlock" xlink:label="PerformanceNarrativeTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformanceNarrativeTextBlock" use="optional" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_BarChartNarrativeTextBlock" xlink:label="BarChartNarrativeTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="BarChartNarrativeTextBlock" use="optional" order="7.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_BarChartHeading" xlink:label="BarChartHeading" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="BarChartHeading" use="optional" order="11.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_BarChartFootnotesTextBlock" xlink:label="BarChartFootnotesTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="BarChartFootnotesTextBlock" use="optional" order="13.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_BarChartClosingTextBlock" xlink:label="BarChartClosingTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="BarChartClosingTextBlock" use="optional" order="14.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceTableHeading" xlink:label="PerformanceTableHeading" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformanceTableHeading" use="optional" order="24.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceTableNarrativeTextBlock" xlink:label="PerformanceTableNarrativeTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformanceTableNarrativeTextBlock" use="optional" order="25.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceTableClosingTextBlock" xlink:label="PerformanceTableClosingTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformanceTableClosingTextBlock" use="optional" order="39.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_BarChartTableTextBlock" xlink:label="BarChartTableTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="BarChartTableTextBlock" use="optional" order="12.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceTableTextBlock" xlink:label="PerformanceTableTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformanceTableTextBlock" use="optional" order="31.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_MarketIndexPerformanceTableTextBlock" xlink:label="MarketIndexPerformanceTableTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="MarketIndexPerformanceTableTextBlock" use="optional" order="34.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_MoneyMarketSevenDayYieldCaption" xlink:label="MoneyMarketSevenDayYieldCaption" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="MoneyMarketSevenDayYieldCaption" order="40.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_MoneyMarketSevenDayYieldColumnName" xlink:label="MoneyMarketSevenDayYieldColumnName" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="MoneyMarketSevenDayYieldColumnName" order="41.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_MoneyMarketSevenDayYieldPhone" xlink:label="MoneyMarketSevenDayYieldPhone" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="MoneyMarketSevenDayYieldPhone" order="42.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_MoneyMarketSevenDayYield" xlink:label="MoneyMarketSevenDayYield" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="MoneyMarketSevenDayYield" order="43.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_MoneyMarketSevenDayTaxEquivalentYield" xlink:label="MoneyMarketSevenDayTaxEquivalentYield" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="MoneyMarketSevenDayTaxEquivalentYield" order="44.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ThirtyDayYieldCaption" xlink:label="ThirtyDayYieldCaption" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ThirtyDayYieldCaption" order="45.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ThirtyDayYieldColumnName" xlink:label="ThirtyDayYieldColumnName" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ThirtyDayYieldColumnName" order="46.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ThirtyDayYieldPhone" xlink:label="ThirtyDayYieldPhone" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ThirtyDayYieldPhone" order="47.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ThirtyDayYield" xlink:label="ThirtyDayYield" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ThirtyDayYield" order="48.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ThirtyDayTaxEquivalentYield" xlink:label="ThirtyDayTaxEquivalentYield" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ThirtyDayTaxEquivalentYield" order="49.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceAvailabilityWebSiteAddress" xlink:label="PerformanceAvailabilityWebSiteAddress" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformanceAvailabilityWebSiteAddress" order="50.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceAvailabilityPhone" xlink:label="PerformanceAvailabilityPhone" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformanceAvailabilityPhone" order="51.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceTableFootnotesTextBlock" xlink:label="PerformanceTableFootnotesTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformanceTableFootnotesTextBlock" use="optional" order="35.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceTableFootnotesReasonPerformanceInformationForClassDifferentFromImmediatelyPrecedingPeriod" xlink:label="PerformanceTableFootnotesReasonPerformanceInformationForClassDifferentFromImmediatelyPrecedingPeriod" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformanceTableFootnotesReasonPerformanceInformationForClassDifferentFromImmediatelyPrecedingPeriod" order="36.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceTableOneClassOfAfterTaxShown" xlink:label="PerformanceTableOneClassOfAfterTaxShown" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformanceTableOneClassOfAfterTaxShown" order="37.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_IndexNoDeductionForFeesExpensesTaxes" xlink:label="IndexNoDeductionForFeesExpensesTaxes" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="IndexNoDeductionForFeesExpensesTaxes" order="38.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AverageAnnualReturnCaption" xlink:label="AverageAnnualReturnCaption" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="AverageAnnualReturnCaption" order="32.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AverageAnnualReturnColumnName" xlink:label="AverageAnnualReturnColumnName" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="AverageAnnualReturnColumnName" order="33.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceTableDoesReflectSalesLoads" xlink:label="PerformanceTableDoesReflectSalesLoads" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformanceTableDoesReflectSalesLoads" order="26.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceTableMarketIndexChanged" xlink:label="PerformanceTableMarketIndexChanged" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformanceTableMarketIndexChanged" order="27.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceTableUsesHighestFederalRate" xlink:label="PerformanceTableUsesHighestFederalRate" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformanceTableUsesHighestFederalRate" order="28.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceTableNotRelevantToTaxDeferred" xlink:label="PerformanceTableNotRelevantToTaxDeferred" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformanceTableNotRelevantToTaxDeferred" order="29.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceTableExplanationAfterTaxHigher" xlink:label="PerformanceTableExplanationAfterTaxHigher" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformanceTableExplanationAfterTaxHigher" order="30.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_YearToDateReturnLabel" xlink:label="YearToDateReturnLabel" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="YearToDateReturnLabel" order="15.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_BarChartYearToDateReturn" xlink:label="BarChartYearToDateReturn" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="BarChartYearToDateReturn" order="16.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_BarChartYearToDateReturnDate" xlink:label="BarChartYearToDateReturnDate" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="BarChartYearToDateReturnDate" order="17.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_HighestQuarterlyReturnLabel" xlink:label="HighestQuarterlyReturnLabel" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="HighestQuarterlyReturnLabel" order="18.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_BarChartHighestQuarterlyReturn" xlink:label="BarChartHighestQuarterlyReturn" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="BarChartHighestQuarterlyReturn" order="19.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_BarChartHighestQuarterlyReturnDate" xlink:label="BarChartHighestQuarterlyReturnDate" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="BarChartHighestQuarterlyReturnDate" order="20.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_LowestQuarterlyReturnLabel" xlink:label="LowestQuarterlyReturnLabel" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="LowestQuarterlyReturnLabel" order="21.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_BarChartLowestQuarterlyReturn" xlink:label="BarChartLowestQuarterlyReturn" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="BarChartLowestQuarterlyReturn" order="22.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_BarChartLowestQuarterlyReturnDate" xlink:label="BarChartLowestQuarterlyReturnDate" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="BarChartLowestQuarterlyReturnDate" order="23.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_BarChartDoesNotReflectSalesLoads" xlink:label="BarChartDoesNotReflectSalesLoads" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="BarChartDoesNotReflectSalesLoads" order="8.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_BarChartReturnsForClassNotOfferedInProspectus" xlink:label="BarChartReturnsForClassNotOfferedInProspectus" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="BarChartReturnsForClassNotOfferedInProspectus" order="9.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_BarChartReasonSelectedClassDifferentFromImmediatelyPrecedingPeriod" xlink:label="BarChartReasonSelectedClassDifferentFromImmediatelyPrecedingPeriod" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="BarChartReasonSelectedClassDifferentFromImmediatelyPrecedingPeriod" order="10.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformancePastDoesNotIndicateFuture" xlink:label="PerformancePastDoesNotIndicateFuture" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformancePastDoesNotIndicateFuture" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceInformationIllustratesVariabilityOfReturns" xlink:label="PerformanceInformationIllustratesVariabilityOfReturns" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformanceInformationIllustratesVariabilityOfReturns" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceOneYearOrLess" xlink:label="PerformanceOneYearOrLess" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformanceOneYearOrLess" order="5.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceAdditionalMarketIndex" xlink:label="PerformanceAdditionalMarketIndex" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformanceAdditionalMarketIndex" order="6.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ClassAxis" xlink:label="ClassAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ClassAxis" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ShareClassDomain" xlink:label="ShareClassDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="ShareClassDomain" order="1.0" priority="1" />
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/18/role/InvestmentRisks" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:link="http://www.xbrl.org/2003/linkbase">
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusTable" xlink:label="ProspectusTable" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="DocumentInformationDocumentAxis" use="optional" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentDomain" xlink:label="DocumentDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="DocumentInformationDocumentAxis" xlink:to="DocumentDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="CoregistrantAxis" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AllCoregistrantsMember" xlink:label="AllCoregistrantsMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="CoregistrantAxis" xlink:to="AllCoregistrantsMember" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="LegalEntityAxis" use="optional" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityDomain" xlink:label="EntityDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="EntityDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusLineItems" xlink:label="ProspectusLineItems" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ProspectusLineItems" order="5.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_RiskTextBlock" xlink:label="RiskTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="RiskTextBlock" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_RiskAxis" xlink:label="RiskAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="RiskAxis" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AllRisksMember" xlink:label="AllRisksMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="RiskAxis" xlink:to="AllRisksMember" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_RiskLoseMoneyMember" xlink:label="RiskLoseMoneyMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="RiskAxis" xlink:to="RiskLoseMoneyMember" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_RiskNotInsuredDepositoryInstitutionMember" xlink:label="RiskNotInsuredDepositoryInstitutionMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="RiskAxis" xlink:to="RiskNotInsuredDepositoryInstitutionMember" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_RiskNotInsuredMember" xlink:label="RiskNotInsuredMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="RiskAxis" xlink:to="RiskNotInsuredMember" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_RiskNondiversifiedStatusMember" xlink:label="RiskNondiversifiedStatusMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="RiskAxis" xlink:to="RiskNondiversifiedStatusMember" order="5.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_RiskMoneyMarketFundPriceFluctuatesMember" xlink:label="RiskMoneyMarketFundPriceFluctuatesMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="RiskAxis" xlink:to="RiskMoneyMarketFundPriceFluctuatesMember" order="6.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_RiskMoneyMarketFundMayImposeFeesOrSuspendSalesMember" xlink:label="RiskMoneyMarketFundMayImposeFeesOrSuspendSalesMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="RiskAxis" xlink:to="RiskMoneyMarketFundMayImposeFeesOrSuspendSalesMember" order="7.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_RiskMoneyMarketFundMayNotPreserveDollarMember" xlink:label="RiskMoneyMarketFundMayNotPreserveDollarMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="RiskAxis" xlink:to="RiskMoneyMarketFundMayNotPreserveDollarMember" order="8.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_RiskMoneyMarketFundSponsorMayNotProvideSupportMember" xlink:label="RiskMoneyMarketFundSponsorMayNotProvideSupportMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="RiskAxis" xlink:to="RiskMoneyMarketFundSponsorMayNotProvideSupportMember" order="9.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_RisksAbstract" xlink:label="RisksAbstract" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="RisksAbstract" xlink:to="ProspectusTable" use="optional" order="1.0" priority="1" />
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/18/role/InvestmentStrategy" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:link="http://www.xbrl.org/2003/linkbase">
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_FormN1aAbstract" xlink:label="FormN1aAbstract" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusTable" xlink:label="ProspectusTable" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="FormN1aAbstract" xlink:to="ProspectusTable" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="DocumentInformationDocumentAxis" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentDomain" xlink:label="DocumentDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="DocumentInformationDocumentAxis" xlink:to="DocumentDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="CoregistrantAxis" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AllCoregistrantsMember" xlink:label="AllCoregistrantsMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="CoregistrantAxis" xlink:to="AllCoregistrantsMember" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="LegalEntityAxis" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityDomain" xlink:label="EntityDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="EntityDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusLineItems" xlink:label="ProspectusLineItems" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ProspectusLineItems" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_StrategyHeading" xlink:label="StrategyHeading" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="StrategyHeading" use="optional" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_StrategyNarrativeTextBlock" xlink:label="StrategyNarrativeTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="StrategyNarrativeTextBlock" use="optional" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_StrategyPortfolioConcentration" xlink:label="StrategyPortfolioConcentration" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="StrategyPortfolioConcentration" order="3.0" priority="1" />
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/18/role/FeesAndExpenses" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:link="http://www.xbrl.org/2003/linkbase">
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_FormN1aAbstract" xlink:label="FormN1aAbstract" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusTable" xlink:label="ProspectusTable" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="FormN1aAbstract" xlink:to="ProspectusTable" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="DocumentInformationDocumentAxis" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentDomain" xlink:label="DocumentDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="DocumentInformationDocumentAxis" xlink:to="DocumentDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="CoregistrantAxis" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AllCoregistrantsMember" xlink:label="AllCoregistrantsMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="CoregistrantAxis" xlink:to="AllCoregistrantsMember" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="LegalEntityAxis" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityDomain" xlink:label="EntityDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="EntityDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusLineItems" xlink:label="ProspectusLineItems" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ProspectusLineItems" order="5.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseHeading" xlink:label="ExpenseHeading" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseHeading" use="optional" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseNarrativeTextBlock" xlink:label="ExpenseNarrativeTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseNarrativeTextBlock" use="optional" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ShareholderFeesCaption" xlink:label="ShareholderFeesCaption" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ShareholderFeesCaption" use="optional" order="11.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_OperatingExpensesCaption" xlink:label="OperatingExpensesCaption" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="OperatingExpensesCaption" use="optional" order="13.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseFootnotesTextBlock" xlink:label="ExpenseFootnotesTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseFootnotesTextBlock" use="optional" order="15.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpensesDeferredChargesTextBlock" xlink:label="ExpensesDeferredChargesTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpensesDeferredChargesTextBlock" use="optional" order="16.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpensesRangeOfExchangeFeesTextBlock" xlink:label="ExpensesRangeOfExchangeFeesTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpensesRangeOfExchangeFeesTextBlock" use="optional" order="17.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleHeading" xlink:label="ExpenseExampleHeading" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleHeading" use="optional" order="18.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleByYearHeading" xlink:label="ExpenseExampleByYearHeading" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleByYearHeading" use="optional" order="19.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleNarrativeTextBlock" xlink:label="ExpenseExampleNarrativeTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleNarrativeTextBlock" use="optional" order="20.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleByYearCaption" xlink:label="ExpenseExampleByYearCaption" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleByYearCaption" use="optional" order="21.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleNoRedemptionNarrativeTextBlock" xlink:label="ExpenseExampleNoRedemptionNarrativeTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleNoRedemptionNarrativeTextBlock" use="optional" order="23.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleNoRedemptionByYearCaption" xlink:label="ExpenseExampleNoRedemptionByYearCaption" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleNoRedemptionByYearCaption" use="optional" order="24.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleFootnotesTextBlock" xlink:label="ExpenseExampleFootnotesTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleFootnotesTextBlock" use="optional" order="26.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleClosingTextBlock" xlink:label="ExpenseExampleClosingTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleClosingTextBlock" use="optional" order="27.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PortfolioTurnoverHeading" xlink:label="PortfolioTurnoverHeading" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PortfolioTurnoverHeading" use="optional" order="28.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PortfolioTurnoverTextBlock" xlink:label="PortfolioTurnoverTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PortfolioTurnoverTextBlock" use="optional" order="29.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ShareholderFeesTableTextBlock" xlink:label="ShareholderFeesTableTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ShareholderFeesTableTextBlock" use="optional" order="12.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AnnualFundOperatingExpensesTableTextBlock" xlink:label="AnnualFundOperatingExpensesTableTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="AnnualFundOperatingExpensesTableTextBlock" use="optional" order="14.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleWithRedemptionTableTextBlock" xlink:label="ExpenseExampleWithRedemptionTableTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleWithRedemptionTableTextBlock" use="optional" order="22.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleNoRedemptionTableTextBlock" xlink:label="ExpenseExampleNoRedemptionTableTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleNoRedemptionTableTextBlock" use="optional" order="25.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PortfolioTurnoverRate" xlink:label="PortfolioTurnoverRate" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PortfolioTurnoverRate" order="30.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseBreakpointDiscounts" xlink:label="ExpenseBreakpointDiscounts" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseBreakpointDiscounts" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpensesOtherExpensesHadExtraordinaryExpensesBeenIncluded" xlink:label="ExpensesOtherExpensesHadExtraordinaryExpensesBeenIncluded" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpensesOtherExpensesHadExtraordinaryExpensesBeenIncluded" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpensesRestatedToReflectCurrent" xlink:label="ExpensesRestatedToReflectCurrent" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpensesRestatedToReflectCurrent" order="5.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseBreakpointMinimumInvestmentRequiredAmount" xlink:label="ExpenseBreakpointMinimumInvestmentRequiredAmount" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseBreakpointMinimumInvestmentRequiredAmount" order="6.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_OtherExpensesNewFundBasedOnEstimates" xlink:label="OtherExpensesNewFundBasedOnEstimates" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="OtherExpensesNewFundBasedOnEstimates" order="7.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AcquiredFundFeesAndExpensesBasedOnEstimates" xlink:label="AcquiredFundFeesAndExpensesBasedOnEstimates" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="AcquiredFundFeesAndExpensesBasedOnEstimates" order="8.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpensesNotCorrelatedToRatioDueToAcquiredFundFees" xlink:label="ExpensesNotCorrelatedToRatioDueToAcquiredFundFees" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpensesNotCorrelatedToRatioDueToAcquiredFundFees" order="9.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpensesExplanationOfNonrecurringAccountFee" xlink:label="ExpensesExplanationOfNonrecurringAccountFee" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpensesExplanationOfNonrecurringAccountFee" order="10.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ClassAxis" xlink:label="ClassAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ClassAxis" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ShareClassDomain" xlink:label="ShareClassDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="ShareClassDomain" order="1.0" priority="1" />
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/18/role/N1aSupplement" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:link="http://www.xbrl.org/2003/linkbase">
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_FormN1aAbstract" xlink:label="FormN1aAbstract" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusTable" xlink:label="ProspectusTable" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="FormN1aAbstract" xlink:to="ProspectusTable" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="DocumentInformationDocumentAxis" use="optional" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentDomain" xlink:label="DocumentDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="DocumentInformationDocumentAxis" xlink:to="DocumentDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="CoregistrantAxis" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AllCoregistrantsMember" xlink:label="AllCoregistrantsMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="CoregistrantAxis" xlink:to="AllCoregistrantsMember" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="LegalEntityAxis" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityDomain" xlink:label="EntityDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="EntityDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusLineItems" xlink:label="ProspectusLineItems" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ProspectusLineItems" order="5.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_SupplementToProspectusTextBlock" xlink:label="SupplementToProspectusTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="SupplementToProspectusTextBlock" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ClassAxis" xlink:label="ClassAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ClassAxis" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ShareClassDomain" xlink:label="ShareClassDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="ShareClassDomain" order="1.0" priority="1" />
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/19/role/RiskReturn" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:link="http://www.xbrl.org/2003/linkbase">
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_FormN1aAbstract" xlink:label="FormN1aAbstract" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusTable" xlink:label="ProspectusTable" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="FormN1aAbstract" xlink:to="ProspectusTable" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="DocumentInformationDocumentAxis" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentDomain" xlink:label="DocumentDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="DocumentInformationDocumentAxis" xlink:to="DocumentDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="CoregistrantAxis" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AllCoregistrantsMember" xlink:label="AllCoregistrantsMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="CoregistrantAxis" xlink:to="AllCoregistrantsMember" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="LegalEntityAxis" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityDomain" xlink:label="EntityDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="EntityDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusLineItems" xlink:label="ProspectusLineItems" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ProspectusLineItems" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_RiskReturnHeading" xlink:label="RiskReturnHeading" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="RiskReturnHeading" use="optional" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ObjectiveHeading" xlink:label="ObjectiveHeading" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ObjectiveHeading" use="optional" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ObjectivePrimaryTextBlock" xlink:label="ObjectivePrimaryTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ObjectivePrimaryTextBlock" use="optional" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ObjectiveSecondaryTextBlock" xlink:label="ObjectiveSecondaryTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ObjectiveSecondaryTextBlock" use="optional" order="4.0" priority="1" />
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/19/role/ShareholderFeesData" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:link="http://www.xbrl.org/2003/linkbase">
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusTable" xlink:label="ProspectusTable" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="DocumentInformationDocumentAxis" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentDomain" xlink:label="DocumentDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="DocumentInformationDocumentAxis" xlink:to="DocumentDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="CoregistrantAxis" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AllCoregistrantsMember" xlink:label="AllCoregistrantsMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="CoregistrantAxis" xlink:to="AllCoregistrantsMember" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="LegalEntityAxis" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityDomain" xlink:label="EntityDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="EntityDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusLineItems" xlink:label="ProspectusLineItems" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ProspectusLineItems" order="5.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ShareholderFeesColumnName" xlink:label="ShareholderFeesColumnName" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ShareholderFeesColumnName" use="optional" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_MaximumCumulativeSalesChargeOverOfferingPrice" xlink:label="MaximumCumulativeSalesChargeOverOfferingPrice" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="MaximumCumulativeSalesChargeOverOfferingPrice" use="optional" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_MaximumCumulativeSalesChargeOverOther" xlink:label="MaximumCumulativeSalesChargeOverOther" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="MaximumCumulativeSalesChargeOverOther" use="optional" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice" xlink:label="MaximumSalesChargeImposedOnPurchasesOverOfferingPrice" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="MaximumSalesChargeImposedOnPurchasesOverOfferingPrice" use="optional" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_MaximumDeferredSalesChargeOverOfferingPrice" xlink:label="MaximumDeferredSalesChargeOverOfferingPrice" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="MaximumDeferredSalesChargeOverOfferingPrice" use="optional" order="5.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_MaximumDeferredSalesChargeOverOther" xlink:label="MaximumDeferredSalesChargeOverOther" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="MaximumDeferredSalesChargeOverOther" use="optional" order="6.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther" xlink:label="MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther" use="optional" order="7.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_RedemptionFeeOverRedemption" xlink:label="RedemptionFeeOverRedemption" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="RedemptionFeeOverRedemption" use="optional" order="8.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_RedemptionFee" xlink:label="RedemptionFee" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="RedemptionFee" use="optional" order="9.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExchangeFeeOverRedemption" xlink:label="ExchangeFeeOverRedemption" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExchangeFeeOverRedemption" use="optional" order="10.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExchangeFee" xlink:label="ExchangeFee" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExchangeFee" use="optional" order="11.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_MaximumAccountFeeOverAssets" xlink:label="MaximumAccountFeeOverAssets" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="MaximumAccountFeeOverAssets" use="optional" order="12.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_MaximumAccountFee" xlink:label="MaximumAccountFee" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="MaximumAccountFee" use="optional" order="13.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ShareholderFeeOther" xlink:label="ShareholderFeeOther" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ShareholderFeeOther" use="optional" order="14.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ClassAxis" xlink:label="ClassAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ClassAxis" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ShareClassDomain" xlink:label="ShareClassDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="ShareClassDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ShareholderFeesAbstract" xlink:label="ShareholderFeesAbstract" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ShareholderFeesAbstract" xlink:to="ProspectusTable" order="1.0" priority="1" />
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/19/role/OperatingExpensesData" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:link="http://www.xbrl.org/2003/linkbase">
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_FormN1aAbstract" xlink:label="FormN1aAbstract" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusTable" xlink:label="ProspectusTable" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="FormN1aAbstract" xlink:to="ProspectusTable" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="DocumentInformationDocumentAxis" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentDomain" xlink:label="DocumentDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="DocumentInformationDocumentAxis" xlink:to="DocumentDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="CoregistrantAxis" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AllCoregistrantsMember" xlink:label="AllCoregistrantsMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="CoregistrantAxis" xlink:to="AllCoregistrantsMember" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="LegalEntityAxis" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityDomain" xlink:label="EntityDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="EntityDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusLineItems" xlink:label="ProspectusLineItems" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ProspectusLineItems" order="5.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_OperatingExpensesColumnName" xlink:label="OperatingExpensesColumnName" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="OperatingExpensesColumnName" use="optional" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ManagementFeesOverAssets" xlink:label="ManagementFeesOverAssets" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ManagementFeesOverAssets" use="optional" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_DistributionAndService12b1FeesOverAssets" xlink:label="DistributionAndService12b1FeesOverAssets" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="DistributionAndService12b1FeesOverAssets" use="optional" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_DistributionOrSimilarNon12b1FeesOverAssets" xlink:label="DistributionOrSimilarNon12b1FeesOverAssets" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="DistributionOrSimilarNon12b1FeesOverAssets" use="optional" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_Component1OtherExpensesOverAssets" xlink:label="Component1OtherExpensesOverAssets" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="Component1OtherExpensesOverAssets" use="optional" order="5.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_Component2OtherExpensesOverAssets" xlink:label="Component2OtherExpensesOverAssets" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="Component2OtherExpensesOverAssets" use="optional" order="6.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_Component3OtherExpensesOverAssets" xlink:label="Component3OtherExpensesOverAssets" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="Component3OtherExpensesOverAssets" use="optional" order="7.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_OtherExpensesOverAssets" xlink:label="OtherExpensesOverAssets" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="OtherExpensesOverAssets" use="optional" order="8.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AcquiredFundFeesAndExpensesOverAssets" xlink:label="AcquiredFundFeesAndExpensesOverAssets" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="AcquiredFundFeesAndExpensesOverAssets" use="optional" order="9.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpensesOverAssets" xlink:label="ExpensesOverAssets" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpensesOverAssets" use="optional" order="10.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_FeeWaiverOrReimbursementOverAssets" xlink:label="FeeWaiverOrReimbursementOverAssets" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="FeeWaiverOrReimbursementOverAssets" use="optional" order="11.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_NetExpensesOverAssets" xlink:label="NetExpensesOverAssets" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="NetExpensesOverAssets" use="optional" order="12.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_FeeWaiverOrReimbursementOverAssetsDateOfTermination" xlink:label="FeeWaiverOrReimbursementOverAssetsDateOfTermination" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="FeeWaiverOrReimbursementOverAssetsDateOfTermination" order="13.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ClassAxis" xlink:label="ClassAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ClassAxis" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ShareClassDomain" xlink:label="ShareClassDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="ShareClassDomain" order="1.0" priority="1" />
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/19/role/ExpenseExample" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:link="http://www.xbrl.org/2003/linkbase">
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusTable" xlink:label="ProspectusTable" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="DocumentInformationDocumentAxis" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentDomain" xlink:label="DocumentDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="DocumentInformationDocumentAxis" xlink:to="DocumentDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="CoregistrantAxis" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AllCoregistrantsMember" xlink:label="AllCoregistrantsMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="CoregistrantAxis" xlink:to="AllCoregistrantsMember" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="LegalEntityAxis" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityDomain" xlink:label="EntityDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="EntityDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusLineItems" xlink:label="ProspectusLineItems" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ProspectusLineItems" order="5.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleByYearColumnName" xlink:label="ExpenseExampleByYearColumnName" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleByYearColumnName" use="optional" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleYear01" xlink:label="ExpenseExampleYear01" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleYear01" use="optional" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleYear03" xlink:label="ExpenseExampleYear03" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleYear03" use="optional" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleYear05" xlink:label="ExpenseExampleYear05" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleYear05" use="optional" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleYear10" xlink:label="ExpenseExampleYear10" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleYear10" use="optional" order="5.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ClassAxis" xlink:label="ClassAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ClassAxis" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ShareClassDomain" xlink:label="ShareClassDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="ShareClassDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleAbstract" xlink:label="ExpenseExampleAbstract" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ExpenseExampleAbstract" xlink:to="ProspectusTable" order="1.0" priority="1" />
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/19/role/ExpenseExampleNoRedemption" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:link="http://www.xbrl.org/2003/linkbase">
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusTable" xlink:label="ProspectusTable" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="DocumentInformationDocumentAxis" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentDomain" xlink:label="DocumentDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="DocumentInformationDocumentAxis" xlink:to="DocumentDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="CoregistrantAxis" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AllCoregistrantsMember" xlink:label="AllCoregistrantsMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="CoregistrantAxis" xlink:to="AllCoregistrantsMember" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="LegalEntityAxis" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityDomain" xlink:label="EntityDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="EntityDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusLineItems" xlink:label="ProspectusLineItems" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ProspectusLineItems" order="5.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleNoRedemptionByYearColumnName" xlink:label="ExpenseExampleNoRedemptionByYearColumnName" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleNoRedemptionByYearColumnName" use="optional" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleNoRedemptionYear01" xlink:label="ExpenseExampleNoRedemptionYear01" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleNoRedemptionYear01" use="optional" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleNoRedemptionYear03" xlink:label="ExpenseExampleNoRedemptionYear03" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleNoRedemptionYear03" use="optional" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleNoRedemptionYear05" xlink:label="ExpenseExampleNoRedemptionYear05" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleNoRedemptionYear05" use="optional" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleNoRedemptionYear10" xlink:label="ExpenseExampleNoRedemptionYear10" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleNoRedemptionYear10" use="optional" order="5.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ClassAxis" xlink:label="ClassAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ClassAxis" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ShareClassDomain" xlink:label="ShareClassDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="ShareClassDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleNoRedemptionAbstract" xlink:label="ExpenseExampleNoRedemptionAbstract" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ExpenseExampleNoRedemptionAbstract" xlink:to="ProspectusTable" order="1.0" priority="1" />
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/19/role/BarChartData" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:link="http://www.xbrl.org/2003/linkbase">
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusTable" xlink:label="ProspectusTable" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="DocumentInformationDocumentAxis" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentDomain" xlink:label="DocumentDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="DocumentInformationDocumentAxis" xlink:to="DocumentDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="CoregistrantAxis" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AllCoregistrantsMember" xlink:label="AllCoregistrantsMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="CoregistrantAxis" xlink:to="AllCoregistrantsMember" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="LegalEntityAxis" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityDomain" xlink:label="EntityDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="EntityDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusLineItems" xlink:label="ProspectusLineItems" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ProspectusLineItems" order="5.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AnnualReturnCaption" xlink:label="AnnualReturnCaption" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="AnnualReturnCaption" use="optional" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AnnualReturnColumnName" xlink:label="AnnualReturnColumnName" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="AnnualReturnColumnName" use="optional" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AnnualReturnInceptionDate" xlink:label="AnnualReturnInceptionDate" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="AnnualReturnInceptionDate" use="optional" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AnnlRtrPct" xlink:label="AnnlRtrPct" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="AnnlRtrPct" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ClassAxis" xlink:label="ClassAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ClassAxis" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ShareClassDomain" xlink:label="ShareClassDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="ShareClassDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_BarChartTableAbstract" xlink:label="BarChartTableAbstract" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="BarChartTableAbstract" xlink:to="ProspectusTable" order="1.0" priority="1" />
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/19/role/PerformanceTableData" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:link="http://www.xbrl.org/2003/linkbase">
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusTable" xlink:label="ProspectusTable" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="DocumentInformationDocumentAxis" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentDomain" xlink:label="DocumentDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="DocumentInformationDocumentAxis" xlink:to="DocumentDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="CoregistrantAxis" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AllCoregistrantsMember" xlink:label="AllCoregistrantsMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="CoregistrantAxis" xlink:to="AllCoregistrantsMember" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusLineItems" xlink:label="ProspectusLineItems" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ProspectusLineItems" order="5.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AverageAnnualReturnLabel" xlink:label="AverageAnnualReturnLabel" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="AverageAnnualReturnLabel" use="optional" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AvgAnnlRtrPct" xlink:label="AvgAnnlRtrPct" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="AvgAnnlRtrPct" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerfInceptionDate" xlink:label="PerfInceptionDate" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerfInceptionDate" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ClassAxis" xlink:label="ClassAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ClassAxis" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ShareClassDomain" xlink:label="ShareClassDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="ShareClassDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceMeasureAxis" xlink:label="PerformanceMeasureAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="PerformanceMeasureAxis" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceMeasureDomain" xlink:label="PerformanceMeasureDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="PerformanceMeasureAxis" xlink:to="PerformanceMeasureDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AfterTaxesOnDistributionsMember" xlink:label="AfterTaxesOnDistributionsMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="PerformanceMeasureDomain" xlink:to="AfterTaxesOnDistributionsMember" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AfterTaxesOnDistributionsAndSalesMember" xlink:label="AfterTaxesOnDistributionsAndSalesMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="PerformanceMeasureDomain" xlink:to="AfterTaxesOnDistributionsAndSalesMember" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AverageAnnualReturnAbstract" xlink:label="AverageAnnualReturnAbstract" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="AverageAnnualReturnAbstract" xlink:to="ProspectusTable" order="1.0" priority="1" />
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/19/role/N1aCover" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:link="http://www.xbrl.org/2003/linkbase">
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_FormN1aAbstract" xlink:label="FormN1aAbstract" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusTable" xlink:label="ProspectusTable" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="FormN1aAbstract" xlink:to="ProspectusTable" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="DocumentInformationDocumentAxis" use="optional" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentDomain" xlink:label="DocumentDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="DocumentInformationDocumentAxis" xlink:to="DocumentDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="CoregistrantAxis" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AllCoregistrantsMember" xlink:label="AllCoregistrantsMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="CoregistrantAxis" xlink:to="AllCoregistrantsMember" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusLineItems" xlink:label="ProspectusLineItems" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ProspectusLineItems" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentType" xlink:label="DocumentType" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="DocumentType" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_AmendmentFlag" xlink:label="AmendmentFlag" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="AmendmentFlag" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_AmendmentDescription" xlink:label="AmendmentDescription" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="AmendmentDescription" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityRegistrantName" xlink:label="EntityRegistrantName" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="EntityRegistrantName" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityCentralIndexKey" xlink:label="EntityCentralIndexKey" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="EntityCentralIndexKey" order="5.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityInvCompanyType" xlink:label="EntityInvCompanyType" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="EntityInvCompanyType" order="6.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentPeriodEndDate" xlink:label="DocumentPeriodEndDate" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="DocumentPeriodEndDate" order="7.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusDate" xlink:label="ProspectusDate" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ProspectusDate" order="8.0" priority="1" />
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/19/role/PerformanceManagement" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:link="http://www.xbrl.org/2003/linkbase">
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_FormN1aAbstract" xlink:label="FormN1aAbstract" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusTable" xlink:label="ProspectusTable" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="FormN1aAbstract" xlink:to="ProspectusTable" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="DocumentInformationDocumentAxis" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentDomain" xlink:label="DocumentDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="DocumentInformationDocumentAxis" xlink:to="DocumentDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="CoregistrantAxis" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AllCoregistrantsMember" xlink:label="AllCoregistrantsMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="CoregistrantAxis" xlink:to="AllCoregistrantsMember" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="LegalEntityAxis" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityDomain" xlink:label="EntityDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="EntityDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusLineItems" xlink:label="ProspectusLineItems" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ProspectusLineItems" order="5.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_BarChartAndPerformanceTableHeading" xlink:label="BarChartAndPerformanceTableHeading" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="BarChartAndPerformanceTableHeading" use="optional" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceNarrativeTextBlock" xlink:label="PerformanceNarrativeTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformanceNarrativeTextBlock" use="optional" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_BarChartNarrativeTextBlock" xlink:label="BarChartNarrativeTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="BarChartNarrativeTextBlock" use="optional" order="7.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_BarChartHeading" xlink:label="BarChartHeading" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="BarChartHeading" use="optional" order="11.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_BarChartFootnotesTextBlock" xlink:label="BarChartFootnotesTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="BarChartFootnotesTextBlock" use="optional" order="13.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_BarChartClosingTextBlock" xlink:label="BarChartClosingTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="BarChartClosingTextBlock" use="optional" order="14.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceTableHeading" xlink:label="PerformanceTableHeading" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformanceTableHeading" use="optional" order="24.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceTableNarrativeTextBlock" xlink:label="PerformanceTableNarrativeTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformanceTableNarrativeTextBlock" use="optional" order="25.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceTableClosingTextBlock" xlink:label="PerformanceTableClosingTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformanceTableClosingTextBlock" use="optional" order="39.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_BarChartTableTextBlock" xlink:label="BarChartTableTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="BarChartTableTextBlock" use="optional" order="12.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceTableTextBlock" xlink:label="PerformanceTableTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformanceTableTextBlock" use="optional" order="31.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_MarketIndexPerformanceTableTextBlock" xlink:label="MarketIndexPerformanceTableTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="MarketIndexPerformanceTableTextBlock" use="optional" order="34.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_MoneyMarketSevenDayYieldCaption" xlink:label="MoneyMarketSevenDayYieldCaption" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="MoneyMarketSevenDayYieldCaption" order="40.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_MoneyMarketSevenDayYieldColumnName" xlink:label="MoneyMarketSevenDayYieldColumnName" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="MoneyMarketSevenDayYieldColumnName" order="41.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_MoneyMarketSevenDayYieldPhone" xlink:label="MoneyMarketSevenDayYieldPhone" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="MoneyMarketSevenDayYieldPhone" order="42.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_MoneyMarketSevenDayYield" xlink:label="MoneyMarketSevenDayYield" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="MoneyMarketSevenDayYield" order="43.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_MoneyMarketSevenDayTaxEquivalentYield" xlink:label="MoneyMarketSevenDayTaxEquivalentYield" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="MoneyMarketSevenDayTaxEquivalentYield" order="44.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ThirtyDayYieldCaption" xlink:label="ThirtyDayYieldCaption" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ThirtyDayYieldCaption" order="45.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ThirtyDayYieldColumnName" xlink:label="ThirtyDayYieldColumnName" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ThirtyDayYieldColumnName" order="46.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ThirtyDayYieldPhone" xlink:label="ThirtyDayYieldPhone" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ThirtyDayYieldPhone" order="47.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ThirtyDayYield" xlink:label="ThirtyDayYield" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ThirtyDayYield" order="48.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ThirtyDayTaxEquivalentYield" xlink:label="ThirtyDayTaxEquivalentYield" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ThirtyDayTaxEquivalentYield" order="49.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceAvailabilityWebSiteAddress" xlink:label="PerformanceAvailabilityWebSiteAddress" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformanceAvailabilityWebSiteAddress" order="50.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceAvailabilityPhone" xlink:label="PerformanceAvailabilityPhone" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformanceAvailabilityPhone" order="51.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceTableFootnotesTextBlock" xlink:label="PerformanceTableFootnotesTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformanceTableFootnotesTextBlock" use="optional" order="35.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceTableFootnotesReasonPerformanceInformationForClassDifferentFromImmediatelyPrecedingPeriod" xlink:label="PerformanceTableFootnotesReasonPerformanceInformationForClassDifferentFromImmediatelyPrecedingPeriod" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformanceTableFootnotesReasonPerformanceInformationForClassDifferentFromImmediatelyPrecedingPeriod" order="36.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceTableOneClassOfAfterTaxShown" xlink:label="PerformanceTableOneClassOfAfterTaxShown" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformanceTableOneClassOfAfterTaxShown" order="37.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_IndexNoDeductionForFeesExpensesTaxes" xlink:label="IndexNoDeductionForFeesExpensesTaxes" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="IndexNoDeductionForFeesExpensesTaxes" order="38.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AverageAnnualReturnCaption" xlink:label="AverageAnnualReturnCaption" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="AverageAnnualReturnCaption" order="32.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AverageAnnualReturnColumnName" xlink:label="AverageAnnualReturnColumnName" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="AverageAnnualReturnColumnName" order="33.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceTableDoesReflectSalesLoads" xlink:label="PerformanceTableDoesReflectSalesLoads" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformanceTableDoesReflectSalesLoads" order="26.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceTableMarketIndexChanged" xlink:label="PerformanceTableMarketIndexChanged" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformanceTableMarketIndexChanged" order="27.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceTableUsesHighestFederalRate" xlink:label="PerformanceTableUsesHighestFederalRate" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformanceTableUsesHighestFederalRate" order="28.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceTableNotRelevantToTaxDeferred" xlink:label="PerformanceTableNotRelevantToTaxDeferred" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformanceTableNotRelevantToTaxDeferred" order="29.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceTableExplanationAfterTaxHigher" xlink:label="PerformanceTableExplanationAfterTaxHigher" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformanceTableExplanationAfterTaxHigher" order="30.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_YearToDateReturnLabel" xlink:label="YearToDateReturnLabel" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="YearToDateReturnLabel" order="15.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_BarChartYearToDateReturn" xlink:label="BarChartYearToDateReturn" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="BarChartYearToDateReturn" order="16.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_BarChartYearToDateReturnDate" xlink:label="BarChartYearToDateReturnDate" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="BarChartYearToDateReturnDate" order="17.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_HighestQuarterlyReturnLabel" xlink:label="HighestQuarterlyReturnLabel" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="HighestQuarterlyReturnLabel" order="18.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_BarChartHighestQuarterlyReturn" xlink:label="BarChartHighestQuarterlyReturn" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="BarChartHighestQuarterlyReturn" order="19.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_BarChartHighestQuarterlyReturnDate" xlink:label="BarChartHighestQuarterlyReturnDate" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="BarChartHighestQuarterlyReturnDate" order="20.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_LowestQuarterlyReturnLabel" xlink:label="LowestQuarterlyReturnLabel" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="LowestQuarterlyReturnLabel" order="21.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_BarChartLowestQuarterlyReturn" xlink:label="BarChartLowestQuarterlyReturn" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="BarChartLowestQuarterlyReturn" order="22.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_BarChartLowestQuarterlyReturnDate" xlink:label="BarChartLowestQuarterlyReturnDate" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="BarChartLowestQuarterlyReturnDate" order="23.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_BarChartDoesNotReflectSalesLoads" xlink:label="BarChartDoesNotReflectSalesLoads" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="BarChartDoesNotReflectSalesLoads" order="8.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_BarChartReturnsForClassNotOfferedInProspectus" xlink:label="BarChartReturnsForClassNotOfferedInProspectus" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="BarChartReturnsForClassNotOfferedInProspectus" order="9.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_BarChartReasonSelectedClassDifferentFromImmediatelyPrecedingPeriod" xlink:label="BarChartReasonSelectedClassDifferentFromImmediatelyPrecedingPeriod" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="BarChartReasonSelectedClassDifferentFromImmediatelyPrecedingPeriod" order="10.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformancePastDoesNotIndicateFuture" xlink:label="PerformancePastDoesNotIndicateFuture" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformancePastDoesNotIndicateFuture" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceInformationIllustratesVariabilityOfReturns" xlink:label="PerformanceInformationIllustratesVariabilityOfReturns" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformanceInformationIllustratesVariabilityOfReturns" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceOneYearOrLess" xlink:label="PerformanceOneYearOrLess" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformanceOneYearOrLess" order="5.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceAdditionalMarketIndex" xlink:label="PerformanceAdditionalMarketIndex" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PerformanceAdditionalMarketIndex" order="6.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ClassAxis" xlink:label="ClassAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ClassAxis" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ShareClassDomain" xlink:label="ShareClassDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="ShareClassDomain" order="1.0" priority="1" />
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/19/role/InvestmentRisks" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:link="http://www.xbrl.org/2003/linkbase">
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusTable" xlink:label="ProspectusTable" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="DocumentInformationDocumentAxis" use="optional" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentDomain" xlink:label="DocumentDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="DocumentInformationDocumentAxis" xlink:to="DocumentDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="CoregistrantAxis" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AllCoregistrantsMember" xlink:label="AllCoregistrantsMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="CoregistrantAxis" xlink:to="AllCoregistrantsMember" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="LegalEntityAxis" use="optional" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityDomain" xlink:label="EntityDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="EntityDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusLineItems" xlink:label="ProspectusLineItems" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ProspectusLineItems" order="5.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_RiskTextBlock" xlink:label="RiskTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="RiskTextBlock" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_RiskAxis" xlink:label="RiskAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="RiskAxis" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AllRisksMember" xlink:label="AllRisksMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="RiskAxis" xlink:to="AllRisksMember" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_RiskLoseMoneyMember" xlink:label="RiskLoseMoneyMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="RiskAxis" xlink:to="RiskLoseMoneyMember" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_RiskNotInsuredDepositoryInstitutionMember" xlink:label="RiskNotInsuredDepositoryInstitutionMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="RiskAxis" xlink:to="RiskNotInsuredDepositoryInstitutionMember" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_RiskNotInsuredMember" xlink:label="RiskNotInsuredMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="RiskAxis" xlink:to="RiskNotInsuredMember" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_RiskNondiversifiedStatusMember" xlink:label="RiskNondiversifiedStatusMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="RiskAxis" xlink:to="RiskNondiversifiedStatusMember" order="5.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_RiskMoneyMarketFundPriceFluctuatesMember" xlink:label="RiskMoneyMarketFundPriceFluctuatesMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="RiskAxis" xlink:to="RiskMoneyMarketFundPriceFluctuatesMember" order="6.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_RiskMoneyMarketFundMayImposeFeesOrSuspendSalesMember" xlink:label="RiskMoneyMarketFundMayImposeFeesOrSuspendSalesMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="RiskAxis" xlink:to="RiskMoneyMarketFundMayImposeFeesOrSuspendSalesMember" order="7.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_RiskMoneyMarketFundMayNotPreserveDollarMember" xlink:label="RiskMoneyMarketFundMayNotPreserveDollarMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="RiskAxis" xlink:to="RiskMoneyMarketFundMayNotPreserveDollarMember" order="8.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_RiskMoneyMarketFundSponsorMayNotProvideSupportMember" xlink:label="RiskMoneyMarketFundSponsorMayNotProvideSupportMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="RiskAxis" xlink:to="RiskMoneyMarketFundSponsorMayNotProvideSupportMember" order="9.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_RisksAbstract" xlink:label="RisksAbstract" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="RisksAbstract" xlink:to="ProspectusTable" use="optional" order="1.0" priority="1" />
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/19/role/InvestmentStrategy" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:link="http://www.xbrl.org/2003/linkbase">
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_FormN1aAbstract" xlink:label="FormN1aAbstract" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusTable" xlink:label="ProspectusTable" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="FormN1aAbstract" xlink:to="ProspectusTable" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="DocumentInformationDocumentAxis" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentDomain" xlink:label="DocumentDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="DocumentInformationDocumentAxis" xlink:to="DocumentDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="CoregistrantAxis" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AllCoregistrantsMember" xlink:label="AllCoregistrantsMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="CoregistrantAxis" xlink:to="AllCoregistrantsMember" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="LegalEntityAxis" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityDomain" xlink:label="EntityDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="EntityDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusLineItems" xlink:label="ProspectusLineItems" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ProspectusLineItems" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_StrategyHeading" xlink:label="StrategyHeading" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="StrategyHeading" use="optional" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_StrategyNarrativeTextBlock" xlink:label="StrategyNarrativeTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="StrategyNarrativeTextBlock" use="optional" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_StrategyPortfolioConcentration" xlink:label="StrategyPortfolioConcentration" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="StrategyPortfolioConcentration" order="3.0" priority="1" />
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/19/role/FeesAndExpenses" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:link="http://www.xbrl.org/2003/linkbase">
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_FormN1aAbstract" xlink:label="FormN1aAbstract" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusTable" xlink:label="ProspectusTable" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="FormN1aAbstract" xlink:to="ProspectusTable" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="DocumentInformationDocumentAxis" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentDomain" xlink:label="DocumentDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="DocumentInformationDocumentAxis" xlink:to="DocumentDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="CoregistrantAxis" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AllCoregistrantsMember" xlink:label="AllCoregistrantsMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="CoregistrantAxis" xlink:to="AllCoregistrantsMember" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="LegalEntityAxis" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityDomain" xlink:label="EntityDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="EntityDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusLineItems" xlink:label="ProspectusLineItems" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ProspectusLineItems" order="5.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseHeading" xlink:label="ExpenseHeading" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseHeading" use="optional" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseNarrativeTextBlock" xlink:label="ExpenseNarrativeTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseNarrativeTextBlock" use="optional" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ShareholderFeesCaption" xlink:label="ShareholderFeesCaption" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ShareholderFeesCaption" use="optional" order="11.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_OperatingExpensesCaption" xlink:label="OperatingExpensesCaption" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="OperatingExpensesCaption" use="optional" order="13.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseFootnotesTextBlock" xlink:label="ExpenseFootnotesTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseFootnotesTextBlock" use="optional" order="15.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpensesDeferredChargesTextBlock" xlink:label="ExpensesDeferredChargesTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpensesDeferredChargesTextBlock" use="optional" order="16.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpensesRangeOfExchangeFeesTextBlock" xlink:label="ExpensesRangeOfExchangeFeesTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpensesRangeOfExchangeFeesTextBlock" use="optional" order="17.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleHeading" xlink:label="ExpenseExampleHeading" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleHeading" use="optional" order="18.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleByYearHeading" xlink:label="ExpenseExampleByYearHeading" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleByYearHeading" use="optional" order="19.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleNarrativeTextBlock" xlink:label="ExpenseExampleNarrativeTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleNarrativeTextBlock" use="optional" order="20.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleByYearCaption" xlink:label="ExpenseExampleByYearCaption" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleByYearCaption" use="optional" order="21.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleNoRedemptionNarrativeTextBlock" xlink:label="ExpenseExampleNoRedemptionNarrativeTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleNoRedemptionNarrativeTextBlock" use="optional" order="23.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleNoRedemptionByYearCaption" xlink:label="ExpenseExampleNoRedemptionByYearCaption" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleNoRedemptionByYearCaption" use="optional" order="24.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleFootnotesTextBlock" xlink:label="ExpenseExampleFootnotesTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleFootnotesTextBlock" use="optional" order="26.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleClosingTextBlock" xlink:label="ExpenseExampleClosingTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleClosingTextBlock" use="optional" order="27.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PortfolioTurnoverHeading" xlink:label="PortfolioTurnoverHeading" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PortfolioTurnoverHeading" use="optional" order="28.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PortfolioTurnoverTextBlock" xlink:label="PortfolioTurnoverTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PortfolioTurnoverTextBlock" use="optional" order="29.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ShareholderFeesTableTextBlock" xlink:label="ShareholderFeesTableTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ShareholderFeesTableTextBlock" use="optional" order="12.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AnnualFundOperatingExpensesTableTextBlock" xlink:label="AnnualFundOperatingExpensesTableTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="AnnualFundOperatingExpensesTableTextBlock" use="optional" order="14.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleWithRedemptionTableTextBlock" xlink:label="ExpenseExampleWithRedemptionTableTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleWithRedemptionTableTextBlock" use="optional" order="22.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseExampleNoRedemptionTableTextBlock" xlink:label="ExpenseExampleNoRedemptionTableTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseExampleNoRedemptionTableTextBlock" use="optional" order="25.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PortfolioTurnoverRate" xlink:label="PortfolioTurnoverRate" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="PortfolioTurnoverRate" order="30.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseBreakpointDiscounts" xlink:label="ExpenseBreakpointDiscounts" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseBreakpointDiscounts" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpensesOtherExpensesHadExtraordinaryExpensesBeenIncluded" xlink:label="ExpensesOtherExpensesHadExtraordinaryExpensesBeenIncluded" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpensesOtherExpensesHadExtraordinaryExpensesBeenIncluded" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpensesRestatedToReflectCurrent" xlink:label="ExpensesRestatedToReflectCurrent" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpensesRestatedToReflectCurrent" order="5.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpenseBreakpointMinimumInvestmentRequiredAmount" xlink:label="ExpenseBreakpointMinimumInvestmentRequiredAmount" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpenseBreakpointMinimumInvestmentRequiredAmount" order="6.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_OtherExpensesNewFundBasedOnEstimates" xlink:label="OtherExpensesNewFundBasedOnEstimates" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="OtherExpensesNewFundBasedOnEstimates" order="7.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AcquiredFundFeesAndExpensesBasedOnEstimates" xlink:label="AcquiredFundFeesAndExpensesBasedOnEstimates" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="AcquiredFundFeesAndExpensesBasedOnEstimates" order="8.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpensesNotCorrelatedToRatioDueToAcquiredFundFees" xlink:label="ExpensesNotCorrelatedToRatioDueToAcquiredFundFees" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpensesNotCorrelatedToRatioDueToAcquiredFundFees" order="9.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ExpensesExplanationOfNonrecurringAccountFee" xlink:label="ExpensesExplanationOfNonrecurringAccountFee" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="ExpensesExplanationOfNonrecurringAccountFee" order="10.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ClassAxis" xlink:label="ClassAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ClassAxis" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ShareClassDomain" xlink:label="ShareClassDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="ShareClassDomain" order="1.0" priority="1" />
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/19/role/N1aSupplement" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:link="http://www.xbrl.org/2003/linkbase">
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_FormN1aAbstract" xlink:label="FormN1aAbstract" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusTable" xlink:label="ProspectusTable" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="FormN1aAbstract" xlink:to="ProspectusTable" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="DocumentInformationDocumentAxis" use="optional" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentDomain" xlink:label="DocumentDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="DocumentInformationDocumentAxis" xlink:to="DocumentDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="CoregistrantAxis" order="2.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AllCoregistrantsMember" xlink:label="AllCoregistrantsMember" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="CoregistrantAxis" xlink:to="AllCoregistrantsMember" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="LegalEntityAxis" order="3.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityDomain" xlink:label="EntityDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="EntityDomain" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ProspectusLineItems" xlink:label="ProspectusLineItems" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ProspectusLineItems" order="5.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_SupplementToProspectusTextBlock" xlink:label="SupplementToProspectusTextBlock" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusLineItems" xlink:to="SupplementToProspectusTextBlock" order="1.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ClassAxis" xlink:label="ClassAxis" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ProspectusTable" xlink:to="ClassAxis" order="4.0" priority="1" />
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ShareClassDomain" xlink:label="ShareClassDomain" />
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="ShareClassDomain" order="1.0" priority="1" />
			</link:presentationLink>

            <!--PresentationLink Static End-->
			<!--PresentationLink Dynamic Start-->
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/1/role/RiskReturn">
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis"/>
				
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis"/>				
 				<link:loc xlink:type="locator" xlink:href="#wbf_S000008594Member" xlink:label="S000008594Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="S000008594Member" order="2.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis"/>
				
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/1/role/ShareholderFeesData">
			    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis"/>
				
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_S000008594Member" xlink:label="S000008594Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="S000008594Member" order="2.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ClassAxis" xlink:label="ClassAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000023523Member" xlink:label="C000023523Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000023523Member" order="2.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000023524Member" xlink:label="C000023524Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000023524Member" order="3.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000211716Member" xlink:label="C000211716Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000211716Member" order="4.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis"/>
				
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/1/role/OperatingExpensesData">
			    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis"/>
				
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_S000008594Member" xlink:label="S000008594Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="S000008594Member" order="2.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ClassAxis" xlink:label="ClassAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000023523Member" xlink:label="C000023523Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000023523Member" order="2.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000023524Member" xlink:label="C000023524Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000023524Member" order="3.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000211716Member" xlink:label="C000211716Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000211716Member" order="4.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis"/>
				
			</link:presentationLink>
		    <link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/1/role/ExpenseExample">
			    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis"/>
				
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_S000008594Member" xlink:label="S000008594Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="S000008594Member" order="2.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ClassAxis" xlink:label="ClassAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000023523Member" xlink:label="C000023523Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000023523Member" order="2.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000023524Member" xlink:label="C000023524Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000023524Member" order="3.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000211716Member" xlink:label="C000211716Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000211716Member" order="4.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis"/>
				
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/1/role/ExpenseExampleNoRedemption">
			    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis"/>
				
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_S000008594Member" xlink:label="S000008594Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="S000008594Member" order="2.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ClassAxis" xlink:label="ClassAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000023523Member" xlink:label="C000023523Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000023523Member" order="2.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000023524Member" xlink:label="C000023524Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000023524Member" order="3.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000211716Member" xlink:label="C000211716Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000211716Member" order="4.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis"/>
				
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/1/role/BarChartData">
			    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis"/>
				
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_S000008594Member" xlink:label="S000008594Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="S000008594Member" order="2.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ClassAxis" xlink:label="ClassAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000023523Member" xlink:label="C000023523Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000023523Member" order="2.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000023524Member" xlink:label="C000023524Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000023524Member" order="3.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000211716Member" xlink:label="C000211716Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000211716Member" order="4.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis"/>
				
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/1/role/PerformanceTableData">
			    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis"/>
				
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ClassAxis" xlink:label="ClassAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000023523Member" xlink:label="C000023523Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000023523Member" order="2.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000023524Member" xlink:label="C000023524Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000023524Member" order="3.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000211716Member" xlink:label="C000211716Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000211716Member" order="4.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceMeasureDomain" xlink:label="PerformanceMeasureDomain"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_SAndP500IndexMember" xlink:label="SAndP500IndexMember"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="PerformanceMeasureDomain" xlink:to="SAndP500IndexMember" order="3.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_Russell3000GrowthIndexMember" xlink:label="Russell3000GrowthIndexMember"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="PerformanceMeasureDomain" xlink:to="Russell3000GrowthIndexMember" order="4.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis"/>
				
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/1/role/PerformanceManagement">			   
			    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis"/>
				
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_S000008594Member" xlink:label="S000008594Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="S000008594Member" order="2.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>			
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ClassAxis" xlink:label="ClassAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000023523Member" xlink:label="C000023523Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000023523Member" order="2.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000023524Member" xlink:label="C000023524Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000023524Member" order="3.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000211716Member" xlink:label="C000211716Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000211716Member" order="4.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis"/>
				
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/1/role/InvestmentRisks">
			    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis"/>
				
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_S000008594Member" xlink:label="S000008594Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="S000008594Member" order="2.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AllRisksMember" xlink:label="AllRisksMember"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_MarketRisksMember" xlink:label="MarketRisksMember"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="AllRisksMember" xlink:to="MarketRisksMember" order="10.0" preferredLabel="http://www.xbrl.org/2003/role/label"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_SmallerCompanyRiskMember" xlink:label="SmallerCompanyRiskMember"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="AllRisksMember" xlink:to="SmallerCompanyRiskMember" order="11.0" preferredLabel="http://www.xbrl.org/2003/role/label"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_ShareOwnershipConcentrationRiskMember" xlink:label="ShareOwnershipConcentrationRiskMember"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="AllRisksMember" xlink:to="ShareOwnershipConcentrationRiskMember" order="12.0" preferredLabel="http://www.xbrl.org/2003/role/label"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_StyleRiskMember" xlink:label="StyleRiskMember"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="AllRisksMember" xlink:to="StyleRiskMember" order="13.0" preferredLabel="http://www.xbrl.org/2003/role/label"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_FocusRiskMember" xlink:label="FocusRiskMember"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="AllRisksMember" xlink:to="FocusRiskMember" order="14.0" preferredLabel="http://www.xbrl.org/2003/role/label"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_OperationalAndTechnologyRiskMember" xlink:label="OperationalAndTechnologyRiskMember"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="AllRisksMember" xlink:to="OperationalAndTechnologyRiskMember" order="15.0" preferredLabel="http://www.xbrl.org/2003/role/label"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_EquityFundsGeneralRiskMember" xlink:label="EquityFundsGeneralRiskMember"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="AllRisksMember" xlink:to="EquityFundsGeneralRiskMember" order="16.0" preferredLabel="http://www.xbrl.org/2003/role/label"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis"/>
				
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/1/role/InvestmentStrategy">
			    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis"/>
				
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_S000008594Member" xlink:label="S000008594Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="S000008594Member" order="2.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis"/>
				
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/1/role/FeesAndExpenses">
			    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis"/>
				
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_S000008594Member" xlink:label="S000008594Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="S000008594Member" order="2.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis"/>
				
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/1/role/N1aCover">
			    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis"/>
								
			</link:presentationLink>
            <link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/1/role/N1aSupplement">
			    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis"/>
							
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_S000008594Member" xlink:label="S000008594Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="S000008594Member" order="2.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ClassAxis" xlink:label="ClassAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000023523Member" xlink:label="C000023523Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000023523Member" order="2.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000023524Member" xlink:label="C000023524Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000023524Member" order="3.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000211716Member" xlink:label="C000211716Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000211716Member" order="4.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis"/>
				
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://xbrl.sec.gov/rr/role/InvestmentStrategy">
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis"/>
				
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_S000008594Member" xlink:label="S000008594Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="S000008594Member" order="2.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/2/role/RiskReturn">
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis"/>
				
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis"/>				
 				<link:loc xlink:type="locator" xlink:href="#wbf_S000008601Member" xlink:label="S000008601Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="S000008601Member" order="3.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis"/>
				
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/2/role/ShareholderFeesData">
			    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis"/>
				
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_S000008601Member" xlink:label="S000008601Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="S000008601Member" order="3.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ClassAxis" xlink:label="ClassAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000023538Member" xlink:label="C000023538Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000023538Member" order="5.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000023539Member" xlink:label="C000023539Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000023539Member" order="6.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000211719Member" xlink:label="C000211719Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000211719Member" order="7.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis"/>
				
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/2/role/OperatingExpensesData">
			    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis"/>
				
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_S000008601Member" xlink:label="S000008601Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="S000008601Member" order="3.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ClassAxis" xlink:label="ClassAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000023538Member" xlink:label="C000023538Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000023538Member" order="5.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000023539Member" xlink:label="C000023539Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000023539Member" order="6.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000211719Member" xlink:label="C000211719Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000211719Member" order="7.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis"/>
				
			</link:presentationLink>
		    <link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/2/role/ExpenseExample">
			    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis"/>
				
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_S000008601Member" xlink:label="S000008601Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="S000008601Member" order="3.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ClassAxis" xlink:label="ClassAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000023538Member" xlink:label="C000023538Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000023538Member" order="5.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000023539Member" xlink:label="C000023539Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000023539Member" order="6.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000211719Member" xlink:label="C000211719Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000211719Member" order="7.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis"/>
				
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/2/role/ExpenseExampleNoRedemption">
			    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis"/>
				
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_S000008601Member" xlink:label="S000008601Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="S000008601Member" order="3.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ClassAxis" xlink:label="ClassAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000023538Member" xlink:label="C000023538Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000023538Member" order="5.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000023539Member" xlink:label="C000023539Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000023539Member" order="6.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000211719Member" xlink:label="C000211719Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000211719Member" order="7.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis"/>
				
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/2/role/BarChartData">
			    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis"/>
				
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_S000008601Member" xlink:label="S000008601Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="S000008601Member" order="3.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ClassAxis" xlink:label="ClassAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000023538Member" xlink:label="C000023538Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000023538Member" order="5.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000023539Member" xlink:label="C000023539Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000023539Member" order="6.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000211719Member" xlink:label="C000211719Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000211719Member" order="7.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis"/>
				
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/2/role/PerformanceTableData">
			    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis"/>
				
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ClassAxis" xlink:label="ClassAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000023538Member" xlink:label="C000023538Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000023538Member" order="5.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000023539Member" xlink:label="C000023539Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000023539Member" order="6.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000211719Member" xlink:label="C000211719Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000211719Member" order="7.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceMeasureDomain" xlink:label="PerformanceMeasureDomain"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_Russell1000IndexMember" xlink:label="Russell1000IndexMember"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="PerformanceMeasureDomain" xlink:to="Russell1000IndexMember" order="5.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_Russell1000GrowthIndexMember" xlink:label="Russell1000GrowthIndexMember"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="PerformanceMeasureDomain" xlink:to="Russell1000GrowthIndexMember" order="6.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis"/>
				
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/2/role/PerformanceManagement">			   
			    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis"/>
				
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_S000008601Member" xlink:label="S000008601Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="S000008601Member" order="3.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>			
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ClassAxis" xlink:label="ClassAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000023538Member" xlink:label="C000023538Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000023538Member" order="5.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000023539Member" xlink:label="C000023539Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000023539Member" order="6.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000211719Member" xlink:label="C000211719Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000211719Member" order="7.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis"/>
				
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/2/role/InvestmentRisks">
			    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis"/>
				
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_S000008601Member" xlink:label="S000008601Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="S000008601Member" order="3.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AllRisksMember" xlink:label="AllRisksMember"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_MarketRisksMember" xlink:label="MarketRisksMember"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="AllRisksMember" xlink:to="MarketRisksMember" order="17.0" preferredLabel="http://www.xbrl.org/2003/role/label"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_ShareOwnershipConcentrationRiskMember" xlink:label="ShareOwnershipConcentrationRiskMember"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="AllRisksMember" xlink:to="ShareOwnershipConcentrationRiskMember" order="18.0" preferredLabel="http://www.xbrl.org/2003/role/label"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_StyleRiskMember" xlink:label="StyleRiskMember"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="AllRisksMember" xlink:to="StyleRiskMember" order="19.0" preferredLabel="http://www.xbrl.org/2003/role/label"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_FocusRiskMember" xlink:label="FocusRiskMember"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="AllRisksMember" xlink:to="FocusRiskMember" order="20.0" preferredLabel="http://www.xbrl.org/2003/role/label"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_OperationalAndTechnologyRiskMember" xlink:label="OperationalAndTechnologyRiskMember"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="AllRisksMember" xlink:to="OperationalAndTechnologyRiskMember" order="21.0" preferredLabel="http://www.xbrl.org/2003/role/label"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_EquityFundsGeneralRiskMember" xlink:label="EquityFundsGeneralRiskMember"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="AllRisksMember" xlink:to="EquityFundsGeneralRiskMember" order="22.0" preferredLabel="http://www.xbrl.org/2003/role/label"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis"/>
				
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/2/role/InvestmentStrategy">
			    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis"/>
				
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_S000008601Member" xlink:label="S000008601Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="S000008601Member" order="3.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis"/>
				
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/2/role/FeesAndExpenses">
			    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis"/>
				
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_S000008601Member" xlink:label="S000008601Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="S000008601Member" order="3.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis"/>
				
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/2/role/N1aCover">
			    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis"/>
								
			</link:presentationLink>
            <link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/2/role/N1aSupplement">
			    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis"/>
							
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_S000008601Member" xlink:label="S000008601Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="S000008601Member" order="3.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ClassAxis" xlink:label="ClassAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000023538Member" xlink:label="C000023538Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000023538Member" order="5.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000023539Member" xlink:label="C000023539Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000023539Member" order="6.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000211719Member" xlink:label="C000211719Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000211719Member" order="7.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis"/>
				
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://xbrl.sec.gov/rr/role/InvestmentStrategy">
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis"/>
				
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_S000008601Member" xlink:label="S000008601Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="S000008601Member" order="3.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/3/role/RiskReturn">
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis"/>
				
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis"/>				
 				<link:loc xlink:type="locator" xlink:href="#wbf_S000075391Member" xlink:label="S000075391Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="S000075391Member" order="4.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis"/>
				
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/3/role/ShareholderFeesData">
			    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis"/>
				
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_S000075391Member" xlink:label="S000075391Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="S000075391Member" order="4.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ClassAxis" xlink:label="ClassAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000234386Member" xlink:label="C000234386Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000234386Member" order="8.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000234387Member" xlink:label="C000234387Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000234387Member" order="9.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis"/>
				
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/3/role/OperatingExpensesData">
			    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis"/>
				
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_S000075391Member" xlink:label="S000075391Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="S000075391Member" order="4.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ClassAxis" xlink:label="ClassAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000234386Member" xlink:label="C000234386Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000234386Member" order="8.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000234387Member" xlink:label="C000234387Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000234387Member" order="9.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis"/>
				
			</link:presentationLink>
		    <link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/3/role/ExpenseExample">
			    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis"/>
				
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_S000075391Member" xlink:label="S000075391Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="S000075391Member" order="4.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ClassAxis" xlink:label="ClassAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000234386Member" xlink:label="C000234386Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000234386Member" order="8.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000234387Member" xlink:label="C000234387Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000234387Member" order="9.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis"/>
				
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/3/role/ExpenseExampleNoRedemption">
			    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis"/>
				
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_S000075391Member" xlink:label="S000075391Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="S000075391Member" order="4.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ClassAxis" xlink:label="ClassAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000234386Member" xlink:label="C000234386Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000234386Member" order="8.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000234387Member" xlink:label="C000234387Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000234387Member" order="9.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis"/>
				
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/3/role/BarChartData">
			    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis"/>
				
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_S000075391Member" xlink:label="S000075391Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="S000075391Member" order="4.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ClassAxis" xlink:label="ClassAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000234386Member" xlink:label="C000234386Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000234386Member" order="8.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000234387Member" xlink:label="C000234387Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000234387Member" order="9.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis"/>
				
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/3/role/PerformanceTableData">
			    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis"/>
				
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ClassAxis" xlink:label="ClassAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000234386Member" xlink:label="C000234386Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000234386Member" order="8.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000234387Member" xlink:label="C000234387Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000234387Member" order="9.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceMeasureDomain" xlink:label="PerformanceMeasureDomain"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_RussellMidcapValueIndexMember" xlink:label="RussellMidcapValueIndexMember"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="PerformanceMeasureDomain" xlink:to="RussellMidcapValueIndexMember" order="7.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_Russell3000IndexMember" xlink:label="Russell3000IndexMember"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="PerformanceMeasureDomain" xlink:to="Russell3000IndexMember" order="8.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis"/>
				
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/3/role/PerformanceManagement">			   
			    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis"/>
				
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_S000075391Member" xlink:label="S000075391Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="S000075391Member" order="4.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>			
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ClassAxis" xlink:label="ClassAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000234386Member" xlink:label="C000234386Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000234386Member" order="8.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000234387Member" xlink:label="C000234387Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000234387Member" order="9.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis"/>
				
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/3/role/InvestmentRisks">
			    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis"/>
				
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_S000075391Member" xlink:label="S000075391Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="S000075391Member" order="4.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AllRisksMember" xlink:label="AllRisksMember"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_MarketRisksMember" xlink:label="MarketRisksMember"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="AllRisksMember" xlink:to="MarketRisksMember" order="23.0" preferredLabel="http://www.xbrl.org/2003/role/label"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_MidCapCompanyRiskMember" xlink:label="MidCapCompanyRiskMember"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="AllRisksMember" xlink:to="MidCapCompanyRiskMember" order="24.0" preferredLabel="http://www.xbrl.org/2003/role/label"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_REITRiskMember" xlink:label="REITRiskMember"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="AllRisksMember" xlink:to="REITRiskMember" order="25.0" preferredLabel="http://www.xbrl.org/2003/role/label"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_ForeignInvestmentRiskMember" xlink:label="ForeignInvestmentRiskMember"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="AllRisksMember" xlink:to="ForeignInvestmentRiskMember" order="26.0" preferredLabel="http://www.xbrl.org/2003/role/label"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_ShareOwnershipConcentrationRiskMember" xlink:label="ShareOwnershipConcentrationRiskMember"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="AllRisksMember" xlink:to="ShareOwnershipConcentrationRiskMember" order="27.0" preferredLabel="http://www.xbrl.org/2003/role/label"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_StyleRiskMember" xlink:label="StyleRiskMember"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="AllRisksMember" xlink:to="StyleRiskMember" order="28.0" preferredLabel="http://www.xbrl.org/2003/role/label"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_FocusRiskMember" xlink:label="FocusRiskMember"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="AllRisksMember" xlink:to="FocusRiskMember" order="29.0" preferredLabel="http://www.xbrl.org/2003/role/label"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_OperationalAndTechnologyRiskMember" xlink:label="OperationalAndTechnologyRiskMember"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="AllRisksMember" xlink:to="OperationalAndTechnologyRiskMember" order="30.0" preferredLabel="http://www.xbrl.org/2003/role/label"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_EquityFundsGeneralRiskMember" xlink:label="EquityFundsGeneralRiskMember"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="AllRisksMember" xlink:to="EquityFundsGeneralRiskMember" order="31.0" preferredLabel="http://www.xbrl.org/2003/role/label"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis"/>
				
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/3/role/InvestmentStrategy">
			    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis"/>
				
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_S000075391Member" xlink:label="S000075391Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="S000075391Member" order="4.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis"/>
				
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/3/role/FeesAndExpenses">
			    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis"/>
				
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_S000075391Member" xlink:label="S000075391Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="S000075391Member" order="4.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis"/>
				
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/3/role/N1aCover">
			    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis"/>
								
			</link:presentationLink>
            <link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/3/role/N1aSupplement">
			    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis"/>
							
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_S000075391Member" xlink:label="S000075391Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="S000075391Member" order="4.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ClassAxis" xlink:label="ClassAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000234386Member" xlink:label="C000234386Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000234386Member" order="8.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000234387Member" xlink:label="C000234387Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000234387Member" order="9.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis"/>
				
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://xbrl.sec.gov/rr/role/InvestmentStrategy">
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis"/>
				
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_S000075391Member" xlink:label="S000075391Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="S000075391Member" order="4.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/4/role/RiskReturn">
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis"/>
				
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis"/>				
 				<link:loc xlink:type="locator" xlink:href="#wbf_S000066499Member" xlink:label="S000066499Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="S000066499Member" order="5.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis"/>
				
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/4/role/ShareholderFeesData">
			    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis"/>
				
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_S000066499Member" xlink:label="S000066499Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="S000066499Member" order="5.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ClassAxis" xlink:label="ClassAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000214491Member" xlink:label="C000214491Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000214491Member" order="10.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000214492Member" xlink:label="C000214492Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000214492Member" order="11.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis"/>
				
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/4/role/OperatingExpensesData">
			    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis"/>
				
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_S000066499Member" xlink:label="S000066499Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="S000066499Member" order="5.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ClassAxis" xlink:label="ClassAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000214491Member" xlink:label="C000214491Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000214491Member" order="10.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000214492Member" xlink:label="C000214492Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000214492Member" order="11.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis"/>
				
			</link:presentationLink>
		    <link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/4/role/ExpenseExample">
			    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis"/>
				
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_S000066499Member" xlink:label="S000066499Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="S000066499Member" order="5.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ClassAxis" xlink:label="ClassAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000214491Member" xlink:label="C000214491Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000214491Member" order="10.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000214492Member" xlink:label="C000214492Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000214492Member" order="11.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis"/>
				
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/4/role/ExpenseExampleNoRedemption">
			    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis"/>
				
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_S000066499Member" xlink:label="S000066499Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="S000066499Member" order="5.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ClassAxis" xlink:label="ClassAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000214491Member" xlink:label="C000214491Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000214491Member" order="10.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000214492Member" xlink:label="C000214492Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000214492Member" order="11.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis"/>
				
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/4/role/BarChartData">
			    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis"/>
				
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_S000066499Member" xlink:label="S000066499Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="S000066499Member" order="5.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ClassAxis" xlink:label="ClassAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000214491Member" xlink:label="C000214491Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000214491Member" order="10.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000214492Member" xlink:label="C000214492Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000214492Member" order="11.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis"/>
				
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/4/role/PerformanceTableData">
			    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis"/>
				
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ClassAxis" xlink:label="ClassAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000214491Member" xlink:label="C000214491Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000214491Member" order="10.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000214492Member" xlink:label="C000214492Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000214492Member" order="11.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceMeasureDomain" xlink:label="PerformanceMeasureDomain"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_S000066499Russell3000IndexMember" xlink:label="S000066499Russell3000IndexMember"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="PerformanceMeasureDomain" xlink:to="S000066499Russell3000IndexMember" order="9.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_Russell2500TMIndexMember" xlink:label="Russell2500TMIndexMember"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="PerformanceMeasureDomain" xlink:to="Russell2500TMIndexMember" order="10.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis"/>
				
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/4/role/PerformanceManagement">			   
			    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis"/>
				
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_S000066499Member" xlink:label="S000066499Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="S000066499Member" order="5.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>			
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ClassAxis" xlink:label="ClassAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000214491Member" xlink:label="C000214491Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000214491Member" order="10.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000214492Member" xlink:label="C000214492Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000214492Member" order="11.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis"/>
				
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/4/role/InvestmentRisks">
			    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis"/>
				
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_S000066499Member" xlink:label="S000066499Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="S000066499Member" order="5.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AllRisksMember" xlink:label="AllRisksMember"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_MarketRisksMember" xlink:label="MarketRisksMember"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="AllRisksMember" xlink:to="MarketRisksMember" order="32.0" preferredLabel="http://www.xbrl.org/2003/role/label"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_SmallAndMidCapCompanyRiskMember" xlink:label="SmallAndMidCapCompanyRiskMember"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="AllRisksMember" xlink:to="SmallAndMidCapCompanyRiskMember" order="33.0" preferredLabel="http://www.xbrl.org/2003/role/label"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_ShareOwnershipConcentrationRiskMember" xlink:label="ShareOwnershipConcentrationRiskMember"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="AllRisksMember" xlink:to="ShareOwnershipConcentrationRiskMember" order="34.0" preferredLabel="http://www.xbrl.org/2003/role/label"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_StyleRiskMember" xlink:label="StyleRiskMember"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="AllRisksMember" xlink:to="StyleRiskMember" order="35.0" preferredLabel="http://www.xbrl.org/2003/role/label"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_FocusRiskMember" xlink:label="FocusRiskMember"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="AllRisksMember" xlink:to="FocusRiskMember" order="36.0" preferredLabel="http://www.xbrl.org/2003/role/label"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_OperationalAndTechnologyRiskMember" xlink:label="OperationalAndTechnologyRiskMember"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="AllRisksMember" xlink:to="OperationalAndTechnologyRiskMember" order="37.0" preferredLabel="http://www.xbrl.org/2003/role/label"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_EquityFundsGeneralRiskMember" xlink:label="EquityFundsGeneralRiskMember"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="AllRisksMember" xlink:to="EquityFundsGeneralRiskMember" order="38.0" preferredLabel="http://www.xbrl.org/2003/role/label"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis"/>
				
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/4/role/InvestmentStrategy">
			    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis"/>
				
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_S000066499Member" xlink:label="S000066499Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="S000066499Member" order="5.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis"/>
				
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/4/role/FeesAndExpenses">
			    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis"/>
				
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_S000066499Member" xlink:label="S000066499Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="S000066499Member" order="5.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis"/>
				
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/4/role/N1aCover">
			    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis"/>
								
			</link:presentationLink>
            <link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/4/role/N1aSupplement">
			    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis"/>
							
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_S000066499Member" xlink:label="S000066499Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="S000066499Member" order="5.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ClassAxis" xlink:label="ClassAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000214491Member" xlink:label="C000214491Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000214491Member" order="10.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000214492Member" xlink:label="C000214492Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000214492Member" order="11.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis"/>
				
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://xbrl.sec.gov/rr/role/InvestmentStrategy">
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis"/>
				
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_S000066499Member" xlink:label="S000066499Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="S000066499Member" order="5.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/5/role/RiskReturn">
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis"/>
				
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis"/>				
 				<link:loc xlink:type="locator" xlink:href="#wbf_S000008603Member" xlink:label="S000008603Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="S000008603Member" order="6.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis"/>
				
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/5/role/ShareholderFeesData">
			    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis"/>
				
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_S000008603Member" xlink:label="S000008603Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="S000008603Member" order="6.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ClassAxis" xlink:label="ClassAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000023542Member" xlink:label="C000023542Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000023542Member" order="12.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000023543Member" xlink:label="C000023543Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000023543Member" order="13.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000211721Member" xlink:label="C000211721Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000211721Member" order="14.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis"/>
				
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/5/role/OperatingExpensesData">
			    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis"/>
				
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_S000008603Member" xlink:label="S000008603Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="S000008603Member" order="6.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ClassAxis" xlink:label="ClassAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000023542Member" xlink:label="C000023542Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000023542Member" order="12.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000023543Member" xlink:label="C000023543Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000023543Member" order="13.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000211721Member" xlink:label="C000211721Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000211721Member" order="14.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis"/>
				
			</link:presentationLink>
		    <link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/5/role/ExpenseExample">
			    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis"/>
				
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_S000008603Member" xlink:label="S000008603Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="S000008603Member" order="6.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ClassAxis" xlink:label="ClassAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000023542Member" xlink:label="C000023542Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000023542Member" order="12.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000023543Member" xlink:label="C000023543Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000023543Member" order="13.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000211721Member" xlink:label="C000211721Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000211721Member" order="14.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis"/>
				
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/5/role/ExpenseExampleNoRedemption">
			    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis"/>
				
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_S000008603Member" xlink:label="S000008603Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="S000008603Member" order="6.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ClassAxis" xlink:label="ClassAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000023542Member" xlink:label="C000023542Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000023542Member" order="12.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000023543Member" xlink:label="C000023543Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000023543Member" order="13.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000211721Member" xlink:label="C000211721Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000211721Member" order="14.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis"/>
				
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/5/role/BarChartData">
			    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis"/>
				
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_S000008603Member" xlink:label="S000008603Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="S000008603Member" order="6.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ClassAxis" xlink:label="ClassAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000023542Member" xlink:label="C000023542Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000023542Member" order="12.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000023543Member" xlink:label="C000023543Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000023543Member" order="13.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000211721Member" xlink:label="C000211721Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000211721Member" order="14.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis"/>
				
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/5/role/PerformanceTableData">
			    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis"/>
				
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ClassAxis" xlink:label="ClassAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000023542Member" xlink:label="C000023542Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000023542Member" order="12.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000023543Member" xlink:label="C000023543Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000023543Member" order="13.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000211721Member" xlink:label="C000211721Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000211721Member" order="14.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceMeasureDomain" xlink:label="PerformanceMeasureDomain"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_S000008603Russell3000IndexMember" xlink:label="S000008603Russell3000IndexMember"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="PerformanceMeasureDomain" xlink:to="S000008603Russell3000IndexMember" order="11.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_Russell2500TMGrowthIndexMember" xlink:label="Russell2500TMGrowthIndexMember"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="PerformanceMeasureDomain" xlink:to="Russell2500TMGrowthIndexMember" order="12.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis"/>
				
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/5/role/PerformanceManagement">			   
			    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis"/>
				
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_S000008603Member" xlink:label="S000008603Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="S000008603Member" order="6.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>			
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ClassAxis" xlink:label="ClassAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000023542Member" xlink:label="C000023542Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000023542Member" order="12.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000023543Member" xlink:label="C000023543Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000023543Member" order="13.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000211721Member" xlink:label="C000211721Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000211721Member" order="14.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis"/>
				
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/5/role/InvestmentRisks">
			    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis"/>
				
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_S000008603Member" xlink:label="S000008603Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="S000008603Member" order="6.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AllRisksMember" xlink:label="AllRisksMember"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_MarketRisksMember" xlink:label="MarketRisksMember"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="AllRisksMember" xlink:to="MarketRisksMember" order="39.0" preferredLabel="http://www.xbrl.org/2003/role/label"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_SmallAndMidCapCompanyRiskMember" xlink:label="SmallAndMidCapCompanyRiskMember"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="AllRisksMember" xlink:to="SmallAndMidCapCompanyRiskMember" order="40.0" preferredLabel="http://www.xbrl.org/2003/role/label"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_ShareOwnershipConcentrationRiskMember" xlink:label="ShareOwnershipConcentrationRiskMember"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="AllRisksMember" xlink:to="ShareOwnershipConcentrationRiskMember" order="41.0" preferredLabel="http://www.xbrl.org/2003/role/label"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_StyleRiskMember" xlink:label="StyleRiskMember"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="AllRisksMember" xlink:to="StyleRiskMember" order="42.0" preferredLabel="http://www.xbrl.org/2003/role/label"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_FocusRiskMember" xlink:label="FocusRiskMember"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="AllRisksMember" xlink:to="FocusRiskMember" order="43.0" preferredLabel="http://www.xbrl.org/2003/role/label"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_OperationalAndTechnologyRiskMember" xlink:label="OperationalAndTechnologyRiskMember"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="AllRisksMember" xlink:to="OperationalAndTechnologyRiskMember" order="44.0" preferredLabel="http://www.xbrl.org/2003/role/label"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_EquityFundsGeneralRiskMember" xlink:label="EquityFundsGeneralRiskMember"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="AllRisksMember" xlink:to="EquityFundsGeneralRiskMember" order="45.0" preferredLabel="http://www.xbrl.org/2003/role/label"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis"/>
				
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/5/role/InvestmentStrategy">
			    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis"/>
				
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_S000008603Member" xlink:label="S000008603Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="S000008603Member" order="6.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis"/>
				
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/5/role/FeesAndExpenses">
			    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis"/>
				
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_S000008603Member" xlink:label="S000008603Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="S000008603Member" order="6.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis"/>
				
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/5/role/N1aCover">
			    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis"/>
								
			</link:presentationLink>
            <link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/5/role/N1aSupplement">
			    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis"/>
							
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_S000008603Member" xlink:label="S000008603Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="S000008603Member" order="6.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ClassAxis" xlink:label="ClassAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000023542Member" xlink:label="C000023542Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000023542Member" order="12.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000023543Member" xlink:label="C000023543Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000023543Member" order="13.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000211721Member" xlink:label="C000211721Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000211721Member" order="14.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis"/>
				
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://xbrl.sec.gov/rr/role/InvestmentStrategy">
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis"/>
				
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_S000008603Member" xlink:label="S000008603Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="S000008603Member" order="6.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/6/role/RiskReturn">
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis"/>
				
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis"/>				
 				<link:loc xlink:type="locator" xlink:href="#wbf_S000080810Member" xlink:label="S000080810Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="S000080810Member" order="7.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis"/>
				
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/6/role/ShareholderFeesData">
			    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis"/>
				
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_S000080810Member" xlink:label="S000080810Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="S000080810Member" order="7.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ClassAxis" xlink:label="ClassAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000243363Member" xlink:label="C000243363Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000243363Member" order="15.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000243364Member" xlink:label="C000243364Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000243364Member" order="16.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis"/>
				
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/6/role/OperatingExpensesData">
			    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis"/>
				
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_S000080810Member" xlink:label="S000080810Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="S000080810Member" order="7.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ClassAxis" xlink:label="ClassAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000243363Member" xlink:label="C000243363Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000243363Member" order="15.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000243364Member" xlink:label="C000243364Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000243364Member" order="16.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis"/>
				
			</link:presentationLink>
		    <link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/6/role/ExpenseExample">
			    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis"/>
				
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_S000080810Member" xlink:label="S000080810Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="S000080810Member" order="7.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ClassAxis" xlink:label="ClassAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000243363Member" xlink:label="C000243363Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000243363Member" order="15.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000243364Member" xlink:label="C000243364Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000243364Member" order="16.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis"/>
				
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/6/role/ExpenseExampleNoRedemption">
			    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis"/>
				
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_S000080810Member" xlink:label="S000080810Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="S000080810Member" order="7.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ClassAxis" xlink:label="ClassAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000243363Member" xlink:label="C000243363Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000243363Member" order="15.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000243364Member" xlink:label="C000243364Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000243364Member" order="16.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis"/>
				
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/6/role/BarChartData">
			    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis"/>
				
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_S000080810Member" xlink:label="S000080810Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="S000080810Member" order="7.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ClassAxis" xlink:label="ClassAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000243363Member" xlink:label="C000243363Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000243363Member" order="15.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000243364Member" xlink:label="C000243364Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000243364Member" order="16.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis"/>
				
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/6/role/PerformanceTableData">
			    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis"/>
				
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ClassAxis" xlink:label="ClassAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000243363Member" xlink:label="C000243363Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000243363Member" order="15.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000243364Member" xlink:label="C000243364Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000243364Member" order="16.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceMeasureDomain" xlink:label="PerformanceMeasureDomain"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_S000080810Russell3000IndexMember" xlink:label="S000080810Russell3000IndexMember"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="PerformanceMeasureDomain" xlink:to="S000080810Russell3000IndexMember" order="13.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_Russell2500TMValueIndexMember" xlink:label="Russell2500TMValueIndexMember"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="PerformanceMeasureDomain" xlink:to="Russell2500TMValueIndexMember" order="14.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis"/>
				
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/6/role/PerformanceManagement">			   
			    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis"/>
				
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_S000080810Member" xlink:label="S000080810Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="S000080810Member" order="7.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>			
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ClassAxis" xlink:label="ClassAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000243363Member" xlink:label="C000243363Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000243363Member" order="15.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000243364Member" xlink:label="C000243364Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000243364Member" order="16.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis"/>
				
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/6/role/InvestmentRisks">
			    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis"/>
				
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_S000080810Member" xlink:label="S000080810Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="S000080810Member" order="7.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AllRisksMember" xlink:label="AllRisksMember"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_MarketRisksMember" xlink:label="MarketRisksMember"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="AllRisksMember" xlink:to="MarketRisksMember" order="46.0" preferredLabel="http://www.xbrl.org/2003/role/label"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_SmallAndMidCapCompanyRiskMember" xlink:label="SmallAndMidCapCompanyRiskMember"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="AllRisksMember" xlink:to="SmallAndMidCapCompanyRiskMember" order="47.0" preferredLabel="http://www.xbrl.org/2003/role/label"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_REITRiskMember" xlink:label="REITRiskMember"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="AllRisksMember" xlink:to="REITRiskMember" order="48.0" preferredLabel="http://www.xbrl.org/2003/role/label"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_ForeignInvestmentRiskMember" xlink:label="ForeignInvestmentRiskMember"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="AllRisksMember" xlink:to="ForeignInvestmentRiskMember" order="49.0" preferredLabel="http://www.xbrl.org/2003/role/label"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_ShareOwnershipConcentrationRiskMember" xlink:label="ShareOwnershipConcentrationRiskMember"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="AllRisksMember" xlink:to="ShareOwnershipConcentrationRiskMember" order="50.0" preferredLabel="http://www.xbrl.org/2003/role/label"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_StyleRiskMember" xlink:label="StyleRiskMember"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="AllRisksMember" xlink:to="StyleRiskMember" order="51.0" preferredLabel="http://www.xbrl.org/2003/role/label"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_FocusRiskMember" xlink:label="FocusRiskMember"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="AllRisksMember" xlink:to="FocusRiskMember" order="52.0" preferredLabel="http://www.xbrl.org/2003/role/label"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_OperationalAndTechnologyRiskMember" xlink:label="OperationalAndTechnologyRiskMember"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="AllRisksMember" xlink:to="OperationalAndTechnologyRiskMember" order="53.0" preferredLabel="http://www.xbrl.org/2003/role/label"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_EquityFundsGeneralRiskMember" xlink:label="EquityFundsGeneralRiskMember"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="AllRisksMember" xlink:to="EquityFundsGeneralRiskMember" order="54.0" preferredLabel="http://www.xbrl.org/2003/role/label"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis"/>
				
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/6/role/InvestmentStrategy">
			    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis"/>
				
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_S000080810Member" xlink:label="S000080810Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="S000080810Member" order="7.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis"/>
				
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/6/role/FeesAndExpenses">
			    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis"/>
				
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_S000080810Member" xlink:label="S000080810Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="S000080810Member" order="7.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis"/>
				
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/6/role/N1aCover">
			    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis"/>
								
			</link:presentationLink>
            <link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/6/role/N1aSupplement">
			    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis"/>
							
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_S000080810Member" xlink:label="S000080810Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="S000080810Member" order="7.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ClassAxis" xlink:label="ClassAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000243363Member" xlink:label="C000243363Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000243363Member" order="15.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000243364Member" xlink:label="C000243364Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000243364Member" order="16.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis"/>
				
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://xbrl.sec.gov/rr/role/InvestmentStrategy">
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis"/>
				
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_S000080810Member" xlink:label="S000080810Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="S000080810Member" order="7.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/7/role/RiskReturn">
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis"/>
				
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis"/>				
 				<link:loc xlink:type="locator" xlink:href="#wbf_S000008602Member" xlink:label="S000008602Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="S000008602Member" order="8.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis"/>
				
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/7/role/ShareholderFeesData">
			    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis"/>
				
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_S000008602Member" xlink:label="S000008602Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="S000008602Member" order="8.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ClassAxis" xlink:label="ClassAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000023540Member" xlink:label="C000023540Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000023540Member" order="17.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000023541Member" xlink:label="C000023541Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000023541Member" order="18.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000211720Member" xlink:label="C000211720Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000211720Member" order="19.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis"/>
				
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/7/role/OperatingExpensesData">
			    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis"/>
				
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_S000008602Member" xlink:label="S000008602Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="S000008602Member" order="8.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ClassAxis" xlink:label="ClassAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000023540Member" xlink:label="C000023540Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000023540Member" order="17.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000023541Member" xlink:label="C000023541Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000023541Member" order="18.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000211720Member" xlink:label="C000211720Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000211720Member" order="19.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis"/>
				
			</link:presentationLink>
		    <link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/7/role/ExpenseExample">
			    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis"/>
				
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_S000008602Member" xlink:label="S000008602Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="S000008602Member" order="8.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ClassAxis" xlink:label="ClassAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000023540Member" xlink:label="C000023540Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000023540Member" order="17.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000023541Member" xlink:label="C000023541Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000023541Member" order="18.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000211720Member" xlink:label="C000211720Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000211720Member" order="19.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis"/>
				
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/7/role/ExpenseExampleNoRedemption">
			    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis"/>
				
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_S000008602Member" xlink:label="S000008602Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="S000008602Member" order="8.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ClassAxis" xlink:label="ClassAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000023540Member" xlink:label="C000023540Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000023540Member" order="17.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000023541Member" xlink:label="C000023541Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000023541Member" order="18.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000211720Member" xlink:label="C000211720Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000211720Member" order="19.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis"/>
				
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/7/role/BarChartData">
			    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis"/>
				
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_S000008602Member" xlink:label="S000008602Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="S000008602Member" order="8.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ClassAxis" xlink:label="ClassAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000023540Member" xlink:label="C000023540Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000023540Member" order="17.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000023541Member" xlink:label="C000023541Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000023541Member" order="18.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000211720Member" xlink:label="C000211720Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000211720Member" order="19.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis"/>
				
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/7/role/PerformanceTableData">
			    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis"/>
				
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ClassAxis" xlink:label="ClassAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000023540Member" xlink:label="C000023540Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000023540Member" order="17.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000023541Member" xlink:label="C000023541Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000023541Member" order="18.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000211720Member" xlink:label="C000211720Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000211720Member" order="19.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceMeasureDomain" xlink:label="PerformanceMeasureDomain"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_S000008602Russell3000IndexMember" xlink:label="S000008602Russell3000IndexMember"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="PerformanceMeasureDomain" xlink:to="S000008602Russell3000IndexMember" order="15.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_Russell2000GrowthIndexMember" xlink:label="Russell2000GrowthIndexMember"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="PerformanceMeasureDomain" xlink:to="Russell2000GrowthIndexMember" order="16.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis"/>
				
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/7/role/PerformanceManagement">			   
			    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis"/>
				
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_S000008602Member" xlink:label="S000008602Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="S000008602Member" order="8.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>			
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ClassAxis" xlink:label="ClassAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000023540Member" xlink:label="C000023540Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000023540Member" order="17.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000023541Member" xlink:label="C000023541Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000023541Member" order="18.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000211720Member" xlink:label="C000211720Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000211720Member" order="19.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis"/>
				
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/7/role/InvestmentRisks">
			    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis"/>
				
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_S000008602Member" xlink:label="S000008602Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="S000008602Member" order="8.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AllRisksMember" xlink:label="AllRisksMember"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_MarketRisksMember" xlink:label="MarketRisksMember"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="AllRisksMember" xlink:to="MarketRisksMember" order="55.0" preferredLabel="http://www.xbrl.org/2003/role/label"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_SmallAndMicroCapCompanyRiskMember" xlink:label="SmallAndMicroCapCompanyRiskMember"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="AllRisksMember" xlink:to="SmallAndMicroCapCompanyRiskMember" order="56.0" preferredLabel="http://www.xbrl.org/2003/role/label"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_ShareOwnershipConcentrationRiskMember" xlink:label="ShareOwnershipConcentrationRiskMember"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="AllRisksMember" xlink:to="ShareOwnershipConcentrationRiskMember" order="57.0" preferredLabel="http://www.xbrl.org/2003/role/label"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_StyleRiskMember" xlink:label="StyleRiskMember"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="AllRisksMember" xlink:to="StyleRiskMember" order="58.0" preferredLabel="http://www.xbrl.org/2003/role/label"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_FocusRiskMember" xlink:label="FocusRiskMember"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="AllRisksMember" xlink:to="FocusRiskMember" order="59.0" preferredLabel="http://www.xbrl.org/2003/role/label"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_OperationalAndTechnologyRiskMember" xlink:label="OperationalAndTechnologyRiskMember"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="AllRisksMember" xlink:to="OperationalAndTechnologyRiskMember" order="60.0" preferredLabel="http://www.xbrl.org/2003/role/label"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_EquityFundsGeneralRiskMember" xlink:label="EquityFundsGeneralRiskMember"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="AllRisksMember" xlink:to="EquityFundsGeneralRiskMember" order="61.0" preferredLabel="http://www.xbrl.org/2003/role/label"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis"/>
				
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/7/role/InvestmentStrategy">
			    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis"/>
				
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_S000008602Member" xlink:label="S000008602Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="S000008602Member" order="8.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis"/>
				
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/7/role/FeesAndExpenses">
			    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis"/>
				
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_S000008602Member" xlink:label="S000008602Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="S000008602Member" order="8.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis"/>
				
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/7/role/N1aCover">
			    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis"/>
								
			</link:presentationLink>
            <link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/7/role/N1aSupplement">
			    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis"/>
							
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_S000008602Member" xlink:label="S000008602Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="S000008602Member" order="8.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ClassAxis" xlink:label="ClassAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000023540Member" xlink:label="C000023540Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000023540Member" order="17.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000023541Member" xlink:label="C000023541Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000023541Member" order="18.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000211720Member" xlink:label="C000211720Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000211720Member" order="19.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis"/>
				
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://xbrl.sec.gov/rr/role/InvestmentStrategy">
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis"/>
				
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_S000008602Member" xlink:label="S000008602Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="S000008602Member" order="8.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/8/role/RiskReturn">
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis"/>
				
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis"/>				
 				<link:loc xlink:type="locator" xlink:href="#wbf_S000008597Member" xlink:label="S000008597Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="S000008597Member" order="9.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis"/>
				
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/8/role/ShareholderFeesData">
			    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis"/>
				
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_S000008597Member" xlink:label="S000008597Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="S000008597Member" order="9.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ClassAxis" xlink:label="ClassAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000023531Member" xlink:label="C000023531Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000023531Member" order="20.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000023532Member" xlink:label="C000023532Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000023532Member" order="21.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000211717Member" xlink:label="C000211717Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000211717Member" order="22.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis"/>
				
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/8/role/OperatingExpensesData">
			    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis"/>
				
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_S000008597Member" xlink:label="S000008597Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="S000008597Member" order="9.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ClassAxis" xlink:label="ClassAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000023531Member" xlink:label="C000023531Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000023531Member" order="20.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000023532Member" xlink:label="C000023532Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000023532Member" order="21.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000211717Member" xlink:label="C000211717Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000211717Member" order="22.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis"/>
				
			</link:presentationLink>
		    <link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/8/role/ExpenseExample">
			    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis"/>
				
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_S000008597Member" xlink:label="S000008597Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="S000008597Member" order="9.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ClassAxis" xlink:label="ClassAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000023531Member" xlink:label="C000023531Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000023531Member" order="20.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000023532Member" xlink:label="C000023532Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000023532Member" order="21.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000211717Member" xlink:label="C000211717Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000211717Member" order="22.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis"/>
				
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/8/role/ExpenseExampleNoRedemption">
			    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis"/>
				
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_S000008597Member" xlink:label="S000008597Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="S000008597Member" order="9.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ClassAxis" xlink:label="ClassAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000023531Member" xlink:label="C000023531Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000023531Member" order="20.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000023532Member" xlink:label="C000023532Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000023532Member" order="21.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000211717Member" xlink:label="C000211717Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000211717Member" order="22.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis"/>
				
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/8/role/BarChartData">
			    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis"/>
				
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_S000008597Member" xlink:label="S000008597Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="S000008597Member" order="9.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ClassAxis" xlink:label="ClassAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000023531Member" xlink:label="C000023531Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000023531Member" order="20.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000023532Member" xlink:label="C000023532Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000023532Member" order="21.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000211717Member" xlink:label="C000211717Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000211717Member" order="22.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis"/>
				
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/8/role/PerformanceTableData">
			    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis"/>
				
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ClassAxis" xlink:label="ClassAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000023531Member" xlink:label="C000023531Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000023531Member" order="20.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000023532Member" xlink:label="C000023532Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000023532Member" order="21.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000211717Member" xlink:label="C000211717Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000211717Member" order="22.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceMeasureDomain" xlink:label="PerformanceMeasureDomain"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_S000008597Russell3000IndexMember" xlink:label="S000008597Russell3000IndexMember"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="PerformanceMeasureDomain" xlink:to="S000008597Russell3000IndexMember" order="17.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_Russell2000ValueIndexMember" xlink:label="Russell2000ValueIndexMember"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="PerformanceMeasureDomain" xlink:to="Russell2000ValueIndexMember" order="18.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis"/>
				
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/8/role/PerformanceManagement">			   
			    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis"/>
				
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_S000008597Member" xlink:label="S000008597Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="S000008597Member" order="9.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>			
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ClassAxis" xlink:label="ClassAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000023531Member" xlink:label="C000023531Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000023531Member" order="20.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000023532Member" xlink:label="C000023532Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000023532Member" order="21.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000211717Member" xlink:label="C000211717Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000211717Member" order="22.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis"/>
				
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/8/role/InvestmentRisks">
			    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis"/>
				
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_S000008597Member" xlink:label="S000008597Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="S000008597Member" order="9.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AllRisksMember" xlink:label="AllRisksMember"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_MarketRisksMember" xlink:label="MarketRisksMember"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="AllRisksMember" xlink:to="MarketRisksMember" order="62.0" preferredLabel="http://www.xbrl.org/2003/role/label"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_SmallAndMicroCapCompanyRiskMember" xlink:label="SmallAndMicroCapCompanyRiskMember"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="AllRisksMember" xlink:to="SmallAndMicroCapCompanyRiskMember" order="63.0" preferredLabel="http://www.xbrl.org/2003/role/label"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_REITRiskMember" xlink:label="REITRiskMember"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="AllRisksMember" xlink:to="REITRiskMember" order="64.0" preferredLabel="http://www.xbrl.org/2003/role/label"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_ForeignInvestmentRiskMember" xlink:label="ForeignInvestmentRiskMember"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="AllRisksMember" xlink:to="ForeignInvestmentRiskMember" order="65.0" preferredLabel="http://www.xbrl.org/2003/role/label"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_ShareOwnershipConcentrationRiskMember" xlink:label="ShareOwnershipConcentrationRiskMember"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="AllRisksMember" xlink:to="ShareOwnershipConcentrationRiskMember" order="66.0" preferredLabel="http://www.xbrl.org/2003/role/label"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_StyleRiskMember" xlink:label="StyleRiskMember"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="AllRisksMember" xlink:to="StyleRiskMember" order="67.0" preferredLabel="http://www.xbrl.org/2003/role/label"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_FocusRiskMember" xlink:label="FocusRiskMember"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="AllRisksMember" xlink:to="FocusRiskMember" order="68.0" preferredLabel="http://www.xbrl.org/2003/role/label"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_OperationalAndTechnologyRiskMember" xlink:label="OperationalAndTechnologyRiskMember"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="AllRisksMember" xlink:to="OperationalAndTechnologyRiskMember" order="69.0" preferredLabel="http://www.xbrl.org/2003/role/label"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_EquityFundsGeneralRiskMember" xlink:label="EquityFundsGeneralRiskMember"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="AllRisksMember" xlink:to="EquityFundsGeneralRiskMember" order="70.0" preferredLabel="http://www.xbrl.org/2003/role/label"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis"/>
				
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/8/role/InvestmentStrategy">
			    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis"/>
				
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_S000008597Member" xlink:label="S000008597Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="S000008597Member" order="9.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis"/>
				
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/8/role/FeesAndExpenses">
			    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis"/>
				
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_S000008597Member" xlink:label="S000008597Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="S000008597Member" order="9.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis"/>
				
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/8/role/N1aCover">
			    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis"/>
								
			</link:presentationLink>
            <link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/8/role/N1aSupplement">
			    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis"/>
							
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_S000008597Member" xlink:label="S000008597Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="S000008597Member" order="9.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ClassAxis" xlink:label="ClassAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000023531Member" xlink:label="C000023531Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000023531Member" order="20.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000023532Member" xlink:label="C000023532Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000023532Member" order="21.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000211717Member" xlink:label="C000211717Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000211717Member" order="22.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis"/>
				
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://xbrl.sec.gov/rr/role/InvestmentStrategy">
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis"/>
				
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_S000008597Member" xlink:label="S000008597Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="S000008597Member" order="9.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/9/role/RiskReturn">
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis"/>
				
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis"/>				
 				<link:loc xlink:type="locator" xlink:href="#wbf_S000019315Member" xlink:label="S000019315Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="S000019315Member" order="10.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis"/>
				
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/9/role/ShareholderFeesData">
			    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis"/>
				
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_S000019315Member" xlink:label="S000019315Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="S000019315Member" order="10.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ClassAxis" xlink:label="ClassAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000053607Member" xlink:label="C000053607Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000053607Member" order="23.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000053608Member" xlink:label="C000053608Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000053608Member" order="24.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000053609Member" xlink:label="C000053609Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000053609Member" order="25.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis"/>
				
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/9/role/OperatingExpensesData">
			    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis"/>
				
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_S000019315Member" xlink:label="S000019315Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="S000019315Member" order="10.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ClassAxis" xlink:label="ClassAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000053607Member" xlink:label="C000053607Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000053607Member" order="23.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000053608Member" xlink:label="C000053608Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000053608Member" order="24.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000053609Member" xlink:label="C000053609Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000053609Member" order="25.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis"/>
				
			</link:presentationLink>
		    <link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/9/role/ExpenseExample">
			    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis"/>
				
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_S000019315Member" xlink:label="S000019315Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="S000019315Member" order="10.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ClassAxis" xlink:label="ClassAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000053607Member" xlink:label="C000053607Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000053607Member" order="23.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000053608Member" xlink:label="C000053608Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000053608Member" order="24.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000053609Member" xlink:label="C000053609Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000053609Member" order="25.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis"/>
				
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/9/role/ExpenseExampleNoRedemption">
			    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis"/>
				
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_S000019315Member" xlink:label="S000019315Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="S000019315Member" order="10.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ClassAxis" xlink:label="ClassAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000053607Member" xlink:label="C000053607Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000053607Member" order="23.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000053608Member" xlink:label="C000053608Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000053608Member" order="24.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000053609Member" xlink:label="C000053609Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000053609Member" order="25.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis"/>
				
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/9/role/BarChartData">
			    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis"/>
				
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_S000019315Member" xlink:label="S000019315Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="S000019315Member" order="10.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ClassAxis" xlink:label="ClassAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000053607Member" xlink:label="C000053607Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000053607Member" order="23.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000053608Member" xlink:label="C000053608Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000053608Member" order="24.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000053609Member" xlink:label="C000053609Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000053609Member" order="25.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis"/>
				
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/9/role/PerformanceTableData">
			    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis"/>
				
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ClassAxis" xlink:label="ClassAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000053607Member" xlink:label="C000053607Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000053607Member" order="23.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000053608Member" xlink:label="C000053608Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000053608Member" order="24.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000053609Member" xlink:label="C000053609Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000053609Member" order="25.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceMeasureDomain" xlink:label="PerformanceMeasureDomain"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_MSCIAllCountryWorldIndexNetMember" xlink:label="MSCIAllCountryWorldIndexNetMember"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="PerformanceMeasureDomain" xlink:to="MSCIAllCountryWorldIndexNetMember" order="19.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_MSCIACWIIMINetMember" xlink:label="MSCIACWIIMINetMember"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="PerformanceMeasureDomain" xlink:to="MSCIACWIIMINetMember" order="20.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis"/>
				
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/9/role/PerformanceManagement">			   
			    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis"/>
				
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_S000019315Member" xlink:label="S000019315Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="S000019315Member" order="10.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>			
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ClassAxis" xlink:label="ClassAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000053607Member" xlink:label="C000053607Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000053607Member" order="23.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000053608Member" xlink:label="C000053608Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000053608Member" order="24.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000053609Member" xlink:label="C000053609Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000053609Member" order="25.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis"/>
				
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/9/role/InvestmentRisks">
			    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis"/>
				
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_S000019315Member" xlink:label="S000019315Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="S000019315Member" order="10.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AllRisksMember" xlink:label="AllRisksMember"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_MarketRisksMember" xlink:label="MarketRisksMember"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="AllRisksMember" xlink:to="MarketRisksMember" order="71.0" preferredLabel="http://www.xbrl.org/2003/role/label"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_ForeignInvestmentRiskMember" xlink:label="ForeignInvestmentRiskMember"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="AllRisksMember" xlink:to="ForeignInvestmentRiskMember" order="72.0" preferredLabel="http://www.xbrl.org/2003/role/label"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_CurrencyRiskMember" xlink:label="CurrencyRiskMember"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="AllRisksMember" xlink:to="CurrencyRiskMember" order="73.0" preferredLabel="http://www.xbrl.org/2003/role/label"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_EmergingMarketsRiskMember" xlink:label="EmergingMarketsRiskMember"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="AllRisksMember" xlink:to="EmergingMarketsRiskMember" order="74.0" preferredLabel="http://www.xbrl.org/2003/role/label"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_GeographicRiskMember" xlink:label="GeographicRiskMember"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="AllRisksMember" xlink:to="GeographicRiskMember" order="75.0" preferredLabel="http://www.xbrl.org/2003/role/label"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_SmallerCompanyRiskMember" xlink:label="SmallerCompanyRiskMember"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="AllRisksMember" xlink:to="SmallerCompanyRiskMember" order="76.0" preferredLabel="http://www.xbrl.org/2003/role/label"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_ShareOwnershipConcentrationRiskMember" xlink:label="ShareOwnershipConcentrationRiskMember"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="AllRisksMember" xlink:to="ShareOwnershipConcentrationRiskMember" order="77.0" preferredLabel="http://www.xbrl.org/2003/role/label"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_StyleRiskMember" xlink:label="StyleRiskMember"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="AllRisksMember" xlink:to="StyleRiskMember" order="78.0" preferredLabel="http://www.xbrl.org/2003/role/label"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_FocusRiskMember" xlink:label="FocusRiskMember"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="AllRisksMember" xlink:to="FocusRiskMember" order="79.0" preferredLabel="http://www.xbrl.org/2003/role/label"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_OperationalAndTechnologyRiskMember" xlink:label="OperationalAndTechnologyRiskMember"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="AllRisksMember" xlink:to="OperationalAndTechnologyRiskMember" order="80.0" preferredLabel="http://www.xbrl.org/2003/role/label"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_EquityFundsGeneralRiskMember" xlink:label="EquityFundsGeneralRiskMember"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="AllRisksMember" xlink:to="EquityFundsGeneralRiskMember" order="81.0" preferredLabel="http://www.xbrl.org/2003/role/label"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis"/>
				
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/9/role/InvestmentStrategy">
			    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis"/>
				
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_S000019315Member" xlink:label="S000019315Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="S000019315Member" order="10.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis"/>
				
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/9/role/FeesAndExpenses">
			    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis"/>
				
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_S000019315Member" xlink:label="S000019315Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="S000019315Member" order="10.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis"/>
				
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/9/role/N1aCover">
			    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis"/>
								
			</link:presentationLink>
            <link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/9/role/N1aSupplement">
			    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis"/>
							
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_S000019315Member" xlink:label="S000019315Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="S000019315Member" order="10.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ClassAxis" xlink:label="ClassAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000053607Member" xlink:label="C000053607Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000053607Member" order="23.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000053608Member" xlink:label="C000053608Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000053608Member" order="24.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000053609Member" xlink:label="C000053609Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000053609Member" order="25.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis"/>
				
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://xbrl.sec.gov/rr/role/InvestmentStrategy">
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis"/>
				
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_S000019315Member" xlink:label="S000019315Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="S000019315Member" order="10.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/10/role/RiskReturn">
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis"/>
				
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis"/>				
 				<link:loc xlink:type="locator" xlink:href="#wbf_S000037763Member" xlink:label="S000037763Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="S000037763Member" order="11.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis"/>
				
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/10/role/ShareholderFeesData">
			    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis"/>
				
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_S000037763Member" xlink:label="S000037763Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="S000037763Member" order="11.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ClassAxis" xlink:label="ClassAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000116468Member" xlink:label="C000116468Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000116468Member" order="26.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000116469Member" xlink:label="C000116469Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000116469Member" order="27.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000116470Member" xlink:label="C000116470Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000116470Member" order="28.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis"/>
				
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/10/role/OperatingExpensesData">
			    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis"/>
				
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_S000037763Member" xlink:label="S000037763Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="S000037763Member" order="11.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ClassAxis" xlink:label="ClassAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000116468Member" xlink:label="C000116468Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000116468Member" order="26.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000116469Member" xlink:label="C000116469Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000116469Member" order="27.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000116470Member" xlink:label="C000116470Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000116470Member" order="28.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis"/>
				
			</link:presentationLink>
		    <link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/10/role/ExpenseExample">
			    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis"/>
				
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_S000037763Member" xlink:label="S000037763Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="S000037763Member" order="11.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ClassAxis" xlink:label="ClassAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000116468Member" xlink:label="C000116468Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000116468Member" order="26.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000116469Member" xlink:label="C000116469Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000116469Member" order="27.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000116470Member" xlink:label="C000116470Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000116470Member" order="28.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis"/>
				
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/10/role/ExpenseExampleNoRedemption">
			    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis"/>
				
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_S000037763Member" xlink:label="S000037763Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="S000037763Member" order="11.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ClassAxis" xlink:label="ClassAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000116468Member" xlink:label="C000116468Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000116468Member" order="26.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000116469Member" xlink:label="C000116469Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000116469Member" order="27.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000116470Member" xlink:label="C000116470Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000116470Member" order="28.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis"/>
				
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/10/role/BarChartData">
			    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis"/>
				
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_S000037763Member" xlink:label="S000037763Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="S000037763Member" order="11.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ClassAxis" xlink:label="ClassAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000116468Member" xlink:label="C000116468Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000116468Member" order="26.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000116469Member" xlink:label="C000116469Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000116469Member" order="27.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000116470Member" xlink:label="C000116470Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000116470Member" order="28.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis"/>
				
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/10/role/PerformanceTableData">
			    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis"/>
				
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ClassAxis" xlink:label="ClassAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000116468Member" xlink:label="C000116468Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000116468Member" order="26.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000116469Member" xlink:label="C000116469Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000116469Member" order="27.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000116470Member" xlink:label="C000116470Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000116470Member" order="28.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceMeasureDomain" xlink:label="PerformanceMeasureDomain"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_S000037763MSCIACWIExUSAIMINetMemberMember" xlink:label="S000037763MSCIACWIExUSAIMINetMemberMember"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="PerformanceMeasureDomain" xlink:to="S000037763MSCIACWIExUSAIMINetMemberMember" order="21.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis"/>
				
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/10/role/PerformanceManagement">			   
			    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis"/>
				
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_S000037763Member" xlink:label="S000037763Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="S000037763Member" order="11.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>			
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ClassAxis" xlink:label="ClassAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000116468Member" xlink:label="C000116468Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000116468Member" order="26.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000116469Member" xlink:label="C000116469Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000116469Member" order="27.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000116470Member" xlink:label="C000116470Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000116470Member" order="28.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis"/>
				
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/10/role/InvestmentRisks">
			    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis"/>
				
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_S000037763Member" xlink:label="S000037763Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="S000037763Member" order="11.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AllRisksMember" xlink:label="AllRisksMember"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_MarketRisksMember" xlink:label="MarketRisksMember"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="AllRisksMember" xlink:to="MarketRisksMember" order="82.0" preferredLabel="http://www.xbrl.org/2003/role/label"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_ForeignInvestmentRiskMember" xlink:label="ForeignInvestmentRiskMember"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="AllRisksMember" xlink:to="ForeignInvestmentRiskMember" order="83.0" preferredLabel="http://www.xbrl.org/2003/role/label"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_CurrencyRiskMember" xlink:label="CurrencyRiskMember"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="AllRisksMember" xlink:to="CurrencyRiskMember" order="84.0" preferredLabel="http://www.xbrl.org/2003/role/label"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_EmergingMarketsRiskMember" xlink:label="EmergingMarketsRiskMember"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="AllRisksMember" xlink:to="EmergingMarketsRiskMember" order="85.0" preferredLabel="http://www.xbrl.org/2003/role/label"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_GeographicRiskMember" xlink:label="GeographicRiskMember"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="AllRisksMember" xlink:to="GeographicRiskMember" order="86.0" preferredLabel="http://www.xbrl.org/2003/role/label"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_SmallerCompanyRiskMember" xlink:label="SmallerCompanyRiskMember"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="AllRisksMember" xlink:to="SmallerCompanyRiskMember" order="87.0" preferredLabel="http://www.xbrl.org/2003/role/label"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_ShareOwnershipConcentrationRiskMember" xlink:label="ShareOwnershipConcentrationRiskMember"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="AllRisksMember" xlink:to="ShareOwnershipConcentrationRiskMember" order="88.0" preferredLabel="http://www.xbrl.org/2003/role/label"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_StyleRiskMember" xlink:label="StyleRiskMember"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="AllRisksMember" xlink:to="StyleRiskMember" order="89.0" preferredLabel="http://www.xbrl.org/2003/role/label"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_FocusRiskMember" xlink:label="FocusRiskMember"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="AllRisksMember" xlink:to="FocusRiskMember" order="90.0" preferredLabel="http://www.xbrl.org/2003/role/label"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_OperationalAndTechnologyRiskMember" xlink:label="OperationalAndTechnologyRiskMember"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="AllRisksMember" xlink:to="OperationalAndTechnologyRiskMember" order="91.0" preferredLabel="http://www.xbrl.org/2003/role/label"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_EquityFundsGeneralRiskMember" xlink:label="EquityFundsGeneralRiskMember"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="AllRisksMember" xlink:to="EquityFundsGeneralRiskMember" order="92.0" preferredLabel="http://www.xbrl.org/2003/role/label"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis"/>
				
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/10/role/InvestmentStrategy">
			    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis"/>
				
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_S000037763Member" xlink:label="S000037763Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="S000037763Member" order="11.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis"/>
				
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/10/role/FeesAndExpenses">
			    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis"/>
				
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_S000037763Member" xlink:label="S000037763Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="S000037763Member" order="11.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis"/>
				
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/10/role/N1aCover">
			    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis"/>
								
			</link:presentationLink>
            <link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/10/role/N1aSupplement">
			    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis"/>
							
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_S000037763Member" xlink:label="S000037763Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="S000037763Member" order="11.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ClassAxis" xlink:label="ClassAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000116468Member" xlink:label="C000116468Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000116468Member" order="26.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000116469Member" xlink:label="C000116469Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000116469Member" order="27.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000116470Member" xlink:label="C000116470Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000116470Member" order="28.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis"/>
				
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://xbrl.sec.gov/rr/role/InvestmentStrategy">
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis"/>
				
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_S000037763Member" xlink:label="S000037763Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="S000037763Member" order="11.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/11/role/RiskReturn">
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis"/>
				
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis"/>				
 				<link:loc xlink:type="locator" xlink:href="#wbf_S000008604Member" xlink:label="S000008604Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="S000008604Member" order="12.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis"/>
				
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/11/role/ShareholderFeesData">
			    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis"/>
				
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_S000008604Member" xlink:label="S000008604Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="S000008604Member" order="12.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ClassAxis" xlink:label="ClassAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000023544Member" xlink:label="C000023544Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000023544Member" order="29.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000023545Member" xlink:label="C000023545Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000023545Member" order="30.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000211722Member" xlink:label="C000211722Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000211722Member" order="31.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis"/>
				
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/11/role/OperatingExpensesData">
			    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis"/>
				
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_S000008604Member" xlink:label="S000008604Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="S000008604Member" order="12.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ClassAxis" xlink:label="ClassAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000023544Member" xlink:label="C000023544Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000023544Member" order="29.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000023545Member" xlink:label="C000023545Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000023545Member" order="30.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000211722Member" xlink:label="C000211722Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000211722Member" order="31.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis"/>
				
			</link:presentationLink>
		    <link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/11/role/ExpenseExample">
			    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis"/>
				
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_S000008604Member" xlink:label="S000008604Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="S000008604Member" order="12.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ClassAxis" xlink:label="ClassAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000023544Member" xlink:label="C000023544Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000023544Member" order="29.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000023545Member" xlink:label="C000023545Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000023545Member" order="30.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000211722Member" xlink:label="C000211722Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000211722Member" order="31.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis"/>
				
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/11/role/ExpenseExampleNoRedemption">
			    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis"/>
				
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_S000008604Member" xlink:label="S000008604Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="S000008604Member" order="12.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ClassAxis" xlink:label="ClassAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000023544Member" xlink:label="C000023544Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000023544Member" order="29.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000023545Member" xlink:label="C000023545Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000023545Member" order="30.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000211722Member" xlink:label="C000211722Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000211722Member" order="31.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis"/>
				
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/11/role/BarChartData">
			    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis"/>
				
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_S000008604Member" xlink:label="S000008604Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="S000008604Member" order="12.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ClassAxis" xlink:label="ClassAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000023544Member" xlink:label="C000023544Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000023544Member" order="29.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000023545Member" xlink:label="C000023545Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000023545Member" order="30.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000211722Member" xlink:label="C000211722Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000211722Member" order="31.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis"/>
				
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/11/role/PerformanceTableData">
			    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis"/>
				
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ClassAxis" xlink:label="ClassAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000023544Member" xlink:label="C000023544Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000023544Member" order="29.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000023545Member" xlink:label="C000023545Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000023545Member" order="30.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000211722Member" xlink:label="C000211722Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000211722Member" order="31.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceMeasureDomain" xlink:label="PerformanceMeasureDomain"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_S000008604MSCIACWIExUSAIMINetMember" xlink:label="S000008604MSCIACWIExUSAIMINetMember"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="PerformanceMeasureDomain" xlink:to="S000008604MSCIACWIExUSAIMINetMember" order="22.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis"/>
				
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/11/role/PerformanceManagement">			   
			    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis"/>
				
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_S000008604Member" xlink:label="S000008604Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="S000008604Member" order="12.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>			
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ClassAxis" xlink:label="ClassAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000023544Member" xlink:label="C000023544Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000023544Member" order="29.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000023545Member" xlink:label="C000023545Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000023545Member" order="30.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000211722Member" xlink:label="C000211722Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000211722Member" order="31.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis"/>
				
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/11/role/InvestmentRisks">
			    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis"/>
				
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_S000008604Member" xlink:label="S000008604Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="S000008604Member" order="12.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AllRisksMember" xlink:label="AllRisksMember"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_MarketRisksMember" xlink:label="MarketRisksMember"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="AllRisksMember" xlink:to="MarketRisksMember" order="93.0" preferredLabel="http://www.xbrl.org/2003/role/label"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_ForeignInvestmentRiskMember" xlink:label="ForeignInvestmentRiskMember"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="AllRisksMember" xlink:to="ForeignInvestmentRiskMember" order="94.0" preferredLabel="http://www.xbrl.org/2003/role/label"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_CurrencyRiskMember" xlink:label="CurrencyRiskMember"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="AllRisksMember" xlink:to="CurrencyRiskMember" order="95.0" preferredLabel="http://www.xbrl.org/2003/role/label"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_EmergingMarketsRiskMember" xlink:label="EmergingMarketsRiskMember"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="AllRisksMember" xlink:to="EmergingMarketsRiskMember" order="96.0" preferredLabel="http://www.xbrl.org/2003/role/label"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_GeographicRiskMember" xlink:label="GeographicRiskMember"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="AllRisksMember" xlink:to="GeographicRiskMember" order="97.0" preferredLabel="http://www.xbrl.org/2003/role/label"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_SmallerCompanyRiskMember" xlink:label="SmallerCompanyRiskMember"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="AllRisksMember" xlink:to="SmallerCompanyRiskMember" order="98.0" preferredLabel="http://www.xbrl.org/2003/role/label"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_ShareOwnershipConcentrationRiskMember" xlink:label="ShareOwnershipConcentrationRiskMember"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="AllRisksMember" xlink:to="ShareOwnershipConcentrationRiskMember" order="99.0" preferredLabel="http://www.xbrl.org/2003/role/label"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_StyleRiskMember" xlink:label="StyleRiskMember"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="AllRisksMember" xlink:to="StyleRiskMember" order="100.0" preferredLabel="http://www.xbrl.org/2003/role/label"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_FocusRiskMember" xlink:label="FocusRiskMember"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="AllRisksMember" xlink:to="FocusRiskMember" order="101.0" preferredLabel="http://www.xbrl.org/2003/role/label"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_OperationalAndTechnologyRiskMember" xlink:label="OperationalAndTechnologyRiskMember"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="AllRisksMember" xlink:to="OperationalAndTechnologyRiskMember" order="102.0" preferredLabel="http://www.xbrl.org/2003/role/label"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_EquityFundsGeneralRiskMember" xlink:label="EquityFundsGeneralRiskMember"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="AllRisksMember" xlink:to="EquityFundsGeneralRiskMember" order="103.0" preferredLabel="http://www.xbrl.org/2003/role/label"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis"/>
				
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/11/role/InvestmentStrategy">
			    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis"/>
				
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_S000008604Member" xlink:label="S000008604Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="S000008604Member" order="12.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis"/>
				
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/11/role/FeesAndExpenses">
			    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis"/>
				
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_S000008604Member" xlink:label="S000008604Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="S000008604Member" order="12.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis"/>
				
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/11/role/N1aCover">
			    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis"/>
								
			</link:presentationLink>
            <link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/11/role/N1aSupplement">
			    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis"/>
							
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_S000008604Member" xlink:label="S000008604Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="S000008604Member" order="12.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ClassAxis" xlink:label="ClassAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000023544Member" xlink:label="C000023544Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000023544Member" order="29.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000023545Member" xlink:label="C000023545Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000023545Member" order="30.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000211722Member" xlink:label="C000211722Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000211722Member" order="31.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis"/>
				
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://xbrl.sec.gov/rr/role/InvestmentStrategy">
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis"/>
				
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_S000008604Member" xlink:label="S000008604Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="S000008604Member" order="12.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/12/role/RiskReturn">
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis"/>
				
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis"/>				
 				<link:loc xlink:type="locator" xlink:href="#wbf_S000008605Member" xlink:label="S000008605Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="S000008605Member" order="13.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis"/>
				
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/12/role/ShareholderFeesData">
			    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis"/>
				
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_S000008605Member" xlink:label="S000008605Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="S000008605Member" order="13.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ClassAxis" xlink:label="ClassAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000023546Member" xlink:label="C000023546Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000023546Member" order="32.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis"/>
				
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/12/role/OperatingExpensesData">
			    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis"/>
				
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_S000008605Member" xlink:label="S000008605Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="S000008605Member" order="13.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ClassAxis" xlink:label="ClassAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000023546Member" xlink:label="C000023546Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000023546Member" order="32.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis"/>
				
			</link:presentationLink>
		    <link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/12/role/ExpenseExample">
			    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis"/>
				
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_S000008605Member" xlink:label="S000008605Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="S000008605Member" order="13.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ClassAxis" xlink:label="ClassAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000023546Member" xlink:label="C000023546Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000023546Member" order="32.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis"/>
				
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/12/role/ExpenseExampleNoRedemption">
			    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis"/>
				
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_S000008605Member" xlink:label="S000008605Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="S000008605Member" order="13.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ClassAxis" xlink:label="ClassAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000023546Member" xlink:label="C000023546Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000023546Member" order="32.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis"/>
				
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/12/role/BarChartData">
			    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis"/>
				
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_S000008605Member" xlink:label="S000008605Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="S000008605Member" order="13.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ClassAxis" xlink:label="ClassAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000023546Member" xlink:label="C000023546Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000023546Member" order="32.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis"/>
				
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/12/role/PerformanceTableData">
			    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis"/>
				
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ClassAxis" xlink:label="ClassAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000023546Member" xlink:label="C000023546Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000023546Member" order="32.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceMeasureDomain" xlink:label="PerformanceMeasureDomain"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_S000008605MSCIACWIExUSAIMINetMember" xlink:label="S000008605MSCIACWIExUSAIMINetMember"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="PerformanceMeasureDomain" xlink:to="S000008605MSCIACWIExUSAIMINetMember" order="23.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis"/>
				
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/12/role/PerformanceManagement">			   
			    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis"/>
				
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_S000008605Member" xlink:label="S000008605Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="S000008605Member" order="13.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>			
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ClassAxis" xlink:label="ClassAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000023546Member" xlink:label="C000023546Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000023546Member" order="32.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis"/>
				
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/12/role/InvestmentRisks">
			    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis"/>
				
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_S000008605Member" xlink:label="S000008605Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="S000008605Member" order="13.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AllRisksMember" xlink:label="AllRisksMember"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_MarketRisksMember" xlink:label="MarketRisksMember"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="AllRisksMember" xlink:to="MarketRisksMember" order="104.0" preferredLabel="http://www.xbrl.org/2003/role/label"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_ForeignInvestmentRiskMember" xlink:label="ForeignInvestmentRiskMember"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="AllRisksMember" xlink:to="ForeignInvestmentRiskMember" order="105.0" preferredLabel="http://www.xbrl.org/2003/role/label"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_CurrencyRiskMember" xlink:label="CurrencyRiskMember"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="AllRisksMember" xlink:to="CurrencyRiskMember" order="106.0" preferredLabel="http://www.xbrl.org/2003/role/label"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_EmergingMarketsRiskMember" xlink:label="EmergingMarketsRiskMember"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="AllRisksMember" xlink:to="EmergingMarketsRiskMember" order="107.0" preferredLabel="http://www.xbrl.org/2003/role/label"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_GeographicRiskMember" xlink:label="GeographicRiskMember"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="AllRisksMember" xlink:to="GeographicRiskMember" order="108.0" preferredLabel="http://www.xbrl.org/2003/role/label"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_SmallerCompanyRiskMember" xlink:label="SmallerCompanyRiskMember"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="AllRisksMember" xlink:to="SmallerCompanyRiskMember" order="109.0" preferredLabel="http://www.xbrl.org/2003/role/label"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_ShareOwnershipConcentrationRiskMember" xlink:label="ShareOwnershipConcentrationRiskMember"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="AllRisksMember" xlink:to="ShareOwnershipConcentrationRiskMember" order="110.0" preferredLabel="http://www.xbrl.org/2003/role/label"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_StyleRiskMember" xlink:label="StyleRiskMember"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="AllRisksMember" xlink:to="StyleRiskMember" order="111.0" preferredLabel="http://www.xbrl.org/2003/role/label"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_FocusRiskMember" xlink:label="FocusRiskMember"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="AllRisksMember" xlink:to="FocusRiskMember" order="112.0" preferredLabel="http://www.xbrl.org/2003/role/label"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_OperationalAndTechnologyRiskMember" xlink:label="OperationalAndTechnologyRiskMember"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="AllRisksMember" xlink:to="OperationalAndTechnologyRiskMember" order="113.0" preferredLabel="http://www.xbrl.org/2003/role/label"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_EquityFundsGeneralRiskMember" xlink:label="EquityFundsGeneralRiskMember"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="AllRisksMember" xlink:to="EquityFundsGeneralRiskMember" order="114.0" preferredLabel="http://www.xbrl.org/2003/role/label"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis"/>
				
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/12/role/InvestmentStrategy">
			    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis"/>
				
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_S000008605Member" xlink:label="S000008605Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="S000008605Member" order="13.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis"/>
				
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/12/role/FeesAndExpenses">
			    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis"/>
				
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_S000008605Member" xlink:label="S000008605Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="S000008605Member" order="13.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis"/>
				
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/12/role/N1aCover">
			    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis"/>
								
			</link:presentationLink>
            <link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/12/role/N1aSupplement">
			    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis"/>
							
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_S000008605Member" xlink:label="S000008605Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="S000008605Member" order="13.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ClassAxis" xlink:label="ClassAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000023546Member" xlink:label="C000023546Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000023546Member" order="32.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis"/>
				
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://xbrl.sec.gov/rr/role/InvestmentStrategy">
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis"/>
				
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_S000008605Member" xlink:label="S000008605Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="S000008605Member" order="13.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/13/role/RiskReturn">
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis"/>
				
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis"/>				
 				<link:loc xlink:type="locator" xlink:href="#wbf_S000008595Member" xlink:label="S000008595Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="S000008595Member" order="14.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis"/>
				
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/13/role/ShareholderFeesData">
			    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis"/>
				
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_S000008595Member" xlink:label="S000008595Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="S000008595Member" order="14.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ClassAxis" xlink:label="ClassAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000023525Member" xlink:label="C000023525Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000023525Member" order="33.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000023526Member" xlink:label="C000023526Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000023526Member" order="34.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000023527Member" xlink:label="C000023527Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000023527Member" order="35.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis"/>
				
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/13/role/OperatingExpensesData">
			    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis"/>
				
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_S000008595Member" xlink:label="S000008595Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="S000008595Member" order="14.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ClassAxis" xlink:label="ClassAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000023525Member" xlink:label="C000023525Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000023525Member" order="33.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000023526Member" xlink:label="C000023526Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000023526Member" order="34.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000023527Member" xlink:label="C000023527Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000023527Member" order="35.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis"/>
				
			</link:presentationLink>
		    <link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/13/role/ExpenseExample">
			    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis"/>
				
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_S000008595Member" xlink:label="S000008595Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="S000008595Member" order="14.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ClassAxis" xlink:label="ClassAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000023525Member" xlink:label="C000023525Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000023525Member" order="33.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000023526Member" xlink:label="C000023526Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000023526Member" order="34.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000023527Member" xlink:label="C000023527Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000023527Member" order="35.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis"/>
				
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/13/role/ExpenseExampleNoRedemption">
			    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis"/>
				
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_S000008595Member" xlink:label="S000008595Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="S000008595Member" order="14.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ClassAxis" xlink:label="ClassAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000023525Member" xlink:label="C000023525Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000023525Member" order="33.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000023526Member" xlink:label="C000023526Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000023526Member" order="34.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000023527Member" xlink:label="C000023527Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000023527Member" order="35.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis"/>
				
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/13/role/BarChartData">
			    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis"/>
				
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_S000008595Member" xlink:label="S000008595Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="S000008595Member" order="14.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ClassAxis" xlink:label="ClassAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000023525Member" xlink:label="C000023525Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000023525Member" order="33.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000023526Member" xlink:label="C000023526Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000023526Member" order="34.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000023527Member" xlink:label="C000023527Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000023527Member" order="35.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis"/>
				
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/13/role/PerformanceTableData">
			    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis"/>
				
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ClassAxis" xlink:label="ClassAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000023525Member" xlink:label="C000023525Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000023525Member" order="33.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000023526Member" xlink:label="C000023526Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000023526Member" order="34.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000023527Member" xlink:label="C000023527Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000023527Member" order="35.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceMeasureDomain" xlink:label="PerformanceMeasureDomain"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_S000008595MSCIACWIExUSAIMINetMember" xlink:label="S000008595MSCIACWIExUSAIMINetMember"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="PerformanceMeasureDomain" xlink:to="S000008595MSCIACWIExUSAIMINetMember" order="24.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_MSCIACWIExUSASmallCapIndexNetMember" xlink:label="MSCIACWIExUSASmallCapIndexNetMember"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="PerformanceMeasureDomain" xlink:to="MSCIACWIExUSASmallCapIndexNetMember" order="25.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis"/>
				
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/13/role/PerformanceManagement">			   
			    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis"/>
				
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_S000008595Member" xlink:label="S000008595Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="S000008595Member" order="14.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>			
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ClassAxis" xlink:label="ClassAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000023525Member" xlink:label="C000023525Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000023525Member" order="33.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000023526Member" xlink:label="C000023526Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000023526Member" order="34.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000023527Member" xlink:label="C000023527Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000023527Member" order="35.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis"/>
				
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/13/role/InvestmentRisks">
			    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis"/>
				
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_S000008595Member" xlink:label="S000008595Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="S000008595Member" order="14.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AllRisksMember" xlink:label="AllRisksMember"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_MarketRisksMember" xlink:label="MarketRisksMember"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="AllRisksMember" xlink:to="MarketRisksMember" order="115.0" preferredLabel="http://www.xbrl.org/2003/role/label"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_ForeignInvestmentRiskMember" xlink:label="ForeignInvestmentRiskMember"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="AllRisksMember" xlink:to="ForeignInvestmentRiskMember" order="116.0" preferredLabel="http://www.xbrl.org/2003/role/label"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_CurrencyRiskMember" xlink:label="CurrencyRiskMember"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="AllRisksMember" xlink:to="CurrencyRiskMember" order="117.0" preferredLabel="http://www.xbrl.org/2003/role/label"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_EmergingMarketsRiskMember" xlink:label="EmergingMarketsRiskMember"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="AllRisksMember" xlink:to="EmergingMarketsRiskMember" order="118.0" preferredLabel="http://www.xbrl.org/2003/role/label"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_GeographicRiskMember" xlink:label="GeographicRiskMember"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="AllRisksMember" xlink:to="GeographicRiskMember" order="119.0" preferredLabel="http://www.xbrl.org/2003/role/label"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_SmallAndMicroCapCompanyRiskMember" xlink:label="SmallAndMicroCapCompanyRiskMember"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="AllRisksMember" xlink:to="SmallAndMicroCapCompanyRiskMember" order="120.0" preferredLabel="http://www.xbrl.org/2003/role/label"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_ShareOwnershipConcentrationRiskMember" xlink:label="ShareOwnershipConcentrationRiskMember"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="AllRisksMember" xlink:to="ShareOwnershipConcentrationRiskMember" order="121.0" preferredLabel="http://www.xbrl.org/2003/role/label"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_StyleRiskMember" xlink:label="StyleRiskMember"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="AllRisksMember" xlink:to="StyleRiskMember" order="122.0" preferredLabel="http://www.xbrl.org/2003/role/label"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_LiquidityRiskMember" xlink:label="LiquidityRiskMember"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="AllRisksMember" xlink:to="LiquidityRiskMember" order="123.0" preferredLabel="http://www.xbrl.org/2003/role/label"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_FocusRiskMember" xlink:label="FocusRiskMember"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="AllRisksMember" xlink:to="FocusRiskMember" order="124.0" preferredLabel="http://www.xbrl.org/2003/role/label"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_OperationalAndTechnologyRiskMember" xlink:label="OperationalAndTechnologyRiskMember"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="AllRisksMember" xlink:to="OperationalAndTechnologyRiskMember" order="125.0" preferredLabel="http://www.xbrl.org/2003/role/label"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_EquityFundsGeneralRiskMember" xlink:label="EquityFundsGeneralRiskMember"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="AllRisksMember" xlink:to="EquityFundsGeneralRiskMember" order="126.0" preferredLabel="http://www.xbrl.org/2003/role/label"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis"/>
				
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/13/role/InvestmentStrategy">
			    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis"/>
				
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_S000008595Member" xlink:label="S000008595Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="S000008595Member" order="14.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis"/>
				
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/13/role/FeesAndExpenses">
			    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis"/>
				
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_S000008595Member" xlink:label="S000008595Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="S000008595Member" order="14.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis"/>
				
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/13/role/N1aCover">
			    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis"/>
								
			</link:presentationLink>
            <link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/13/role/N1aSupplement">
			    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis"/>
							
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_S000008595Member" xlink:label="S000008595Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="S000008595Member" order="14.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ClassAxis" xlink:label="ClassAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000023525Member" xlink:label="C000023525Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000023525Member" order="33.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000023526Member" xlink:label="C000023526Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000023526Member" order="34.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000023527Member" xlink:label="C000023527Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000023527Member" order="35.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis"/>
				
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://xbrl.sec.gov/rr/role/InvestmentStrategy">
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis"/>
				
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_S000008595Member" xlink:label="S000008595Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="S000008595Member" order="14.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/14/role/RiskReturn">
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis"/>
				
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis"/>				
 				<link:loc xlink:type="locator" xlink:href="#wbf_S000021052Member" xlink:label="S000021052Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="S000021052Member" order="15.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis"/>
				
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/14/role/ShareholderFeesData">
			    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis"/>
				
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_S000021052Member" xlink:label="S000021052Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="S000021052Member" order="15.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ClassAxis" xlink:label="ClassAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000059867Member" xlink:label="C000059867Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000059867Member" order="36.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000059868Member" xlink:label="C000059868Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000059868Member" order="37.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000088850Member" xlink:label="C000088850Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000088850Member" order="38.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis"/>
				
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/14/role/OperatingExpensesData">
			    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis"/>
				
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_S000021052Member" xlink:label="S000021052Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="S000021052Member" order="15.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ClassAxis" xlink:label="ClassAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000059867Member" xlink:label="C000059867Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000059867Member" order="36.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000059868Member" xlink:label="C000059868Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000059868Member" order="37.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000088850Member" xlink:label="C000088850Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000088850Member" order="38.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis"/>
				
			</link:presentationLink>
		    <link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/14/role/ExpenseExample">
			    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis"/>
				
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_S000021052Member" xlink:label="S000021052Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="S000021052Member" order="15.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ClassAxis" xlink:label="ClassAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000059867Member" xlink:label="C000059867Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000059867Member" order="36.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000059868Member" xlink:label="C000059868Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000059868Member" order="37.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000088850Member" xlink:label="C000088850Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000088850Member" order="38.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis"/>
				
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/14/role/ExpenseExampleNoRedemption">
			    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis"/>
				
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_S000021052Member" xlink:label="S000021052Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="S000021052Member" order="15.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ClassAxis" xlink:label="ClassAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000059867Member" xlink:label="C000059867Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000059867Member" order="36.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000059868Member" xlink:label="C000059868Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000059868Member" order="37.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000088850Member" xlink:label="C000088850Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000088850Member" order="38.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis"/>
				
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/14/role/BarChartData">
			    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis"/>
				
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_S000021052Member" xlink:label="S000021052Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="S000021052Member" order="15.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ClassAxis" xlink:label="ClassAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000059867Member" xlink:label="C000059867Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000059867Member" order="36.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000059868Member" xlink:label="C000059868Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000059868Member" order="37.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000088850Member" xlink:label="C000088850Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000088850Member" order="38.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis"/>
				
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/14/role/PerformanceTableData">
			    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis"/>
				
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ClassAxis" xlink:label="ClassAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000059867Member" xlink:label="C000059867Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000059867Member" order="36.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000059868Member" xlink:label="C000059868Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000059868Member" order="37.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000088850Member" xlink:label="C000088850Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000088850Member" order="38.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceMeasureDomain" xlink:label="PerformanceMeasureDomain"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_MSCIEmergingMarketsIndexNetMember" xlink:label="MSCIEmergingMarketsIndexNetMember"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="PerformanceMeasureDomain" xlink:to="MSCIEmergingMarketsIndexNetMember" order="26.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis"/>
				
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/14/role/PerformanceManagement">			   
			    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis"/>
				
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_S000021052Member" xlink:label="S000021052Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="S000021052Member" order="15.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>			
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ClassAxis" xlink:label="ClassAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000059867Member" xlink:label="C000059867Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000059867Member" order="36.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000059868Member" xlink:label="C000059868Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000059868Member" order="37.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000088850Member" xlink:label="C000088850Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000088850Member" order="38.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis"/>
				
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/14/role/InvestmentRisks">
			    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis"/>
				
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_S000021052Member" xlink:label="S000021052Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="S000021052Member" order="15.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AllRisksMember" xlink:label="AllRisksMember"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_MarketRisksMember" xlink:label="MarketRisksMember"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="AllRisksMember" xlink:to="MarketRisksMember" order="127.0" preferredLabel="http://www.xbrl.org/2003/role/label"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_ForeignInvestmentRiskMember" xlink:label="ForeignInvestmentRiskMember"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="AllRisksMember" xlink:to="ForeignInvestmentRiskMember" order="128.0" preferredLabel="http://www.xbrl.org/2003/role/label"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_CurrencyRiskMember" xlink:label="CurrencyRiskMember"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="AllRisksMember" xlink:to="CurrencyRiskMember" order="129.0" preferredLabel="http://www.xbrl.org/2003/role/label"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_EmergingMarketsRiskMember" xlink:label="EmergingMarketsRiskMember"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="AllRisksMember" xlink:to="EmergingMarketsRiskMember" order="130.0" preferredLabel="http://www.xbrl.org/2003/role/label"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_GeographicRiskMember" xlink:label="GeographicRiskMember"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="AllRisksMember" xlink:to="GeographicRiskMember" order="131.0" preferredLabel="http://www.xbrl.org/2003/role/label"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_SmallerCompanyRiskMember" xlink:label="SmallerCompanyRiskMember"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="AllRisksMember" xlink:to="SmallerCompanyRiskMember" order="132.0" preferredLabel="http://www.xbrl.org/2003/role/label"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_ShareOwnershipConcentrationRiskMember" xlink:label="ShareOwnershipConcentrationRiskMember"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="AllRisksMember" xlink:to="ShareOwnershipConcentrationRiskMember" order="133.0" preferredLabel="http://www.xbrl.org/2003/role/label"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_StyleRiskMember" xlink:label="StyleRiskMember"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="AllRisksMember" xlink:to="StyleRiskMember" order="134.0" preferredLabel="http://www.xbrl.org/2003/role/label"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_LiquidityRiskMember" xlink:label="LiquidityRiskMember"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="AllRisksMember" xlink:to="LiquidityRiskMember" order="135.0" preferredLabel="http://www.xbrl.org/2003/role/label"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_FocusRiskMember" xlink:label="FocusRiskMember"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="AllRisksMember" xlink:to="FocusRiskMember" order="136.0" preferredLabel="http://www.xbrl.org/2003/role/label"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_OperationalAndTechnologyRiskMember" xlink:label="OperationalAndTechnologyRiskMember"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="AllRisksMember" xlink:to="OperationalAndTechnologyRiskMember" order="137.0" preferredLabel="http://www.xbrl.org/2003/role/label"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_EquityFundsGeneralRiskMember" xlink:label="EquityFundsGeneralRiskMember"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="AllRisksMember" xlink:to="EquityFundsGeneralRiskMember" order="138.0" preferredLabel="http://www.xbrl.org/2003/role/label"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis"/>
				
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/14/role/InvestmentStrategy">
			    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis"/>
				
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_S000021052Member" xlink:label="S000021052Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="S000021052Member" order="15.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis"/>
				
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/14/role/FeesAndExpenses">
			    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis"/>
				
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_S000021052Member" xlink:label="S000021052Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="S000021052Member" order="15.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis"/>
				
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/14/role/N1aCover">
			    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis"/>
								
			</link:presentationLink>
            <link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/14/role/N1aSupplement">
			    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis"/>
							
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_S000021052Member" xlink:label="S000021052Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="S000021052Member" order="15.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ClassAxis" xlink:label="ClassAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000059867Member" xlink:label="C000059867Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000059867Member" order="36.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000059868Member" xlink:label="C000059868Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000059868Member" order="37.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000088850Member" xlink:label="C000088850Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000088850Member" order="38.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis"/>
				
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://xbrl.sec.gov/rr/role/InvestmentStrategy">
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis"/>
				
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_S000021052Member" xlink:label="S000021052Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="S000021052Member" order="15.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/15/role/RiskReturn">
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis"/>
				
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis"/>				
 				<link:loc xlink:type="locator" xlink:href="#wbf_S000008596Member" xlink:label="S000008596Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="S000008596Member" order="16.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis"/>
				
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/15/role/ShareholderFeesData">
			    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis"/>
				
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_S000008596Member" xlink:label="S000008596Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="S000008596Member" order="16.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ClassAxis" xlink:label="ClassAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000023528Member" xlink:label="C000023528Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000023528Member" order="39.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000023529Member" xlink:label="C000023529Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000023529Member" order="40.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000023530Member" xlink:label="C000023530Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000023530Member" order="41.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis"/>
				
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/15/role/OperatingExpensesData">
			    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis"/>
				
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_S000008596Member" xlink:label="S000008596Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="S000008596Member" order="16.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ClassAxis" xlink:label="ClassAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000023528Member" xlink:label="C000023528Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000023528Member" order="39.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000023529Member" xlink:label="C000023529Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000023529Member" order="40.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000023530Member" xlink:label="C000023530Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000023530Member" order="41.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis"/>
				
			</link:presentationLink>
		    <link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/15/role/ExpenseExample">
			    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis"/>
				
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_S000008596Member" xlink:label="S000008596Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="S000008596Member" order="16.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ClassAxis" xlink:label="ClassAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000023528Member" xlink:label="C000023528Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000023528Member" order="39.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000023529Member" xlink:label="C000023529Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000023529Member" order="40.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000023530Member" xlink:label="C000023530Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000023530Member" order="41.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis"/>
				
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/15/role/ExpenseExampleNoRedemption">
			    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis"/>
				
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_S000008596Member" xlink:label="S000008596Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="S000008596Member" order="16.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ClassAxis" xlink:label="ClassAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000023528Member" xlink:label="C000023528Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000023528Member" order="39.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000023529Member" xlink:label="C000023529Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000023529Member" order="40.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000023530Member" xlink:label="C000023530Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000023530Member" order="41.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis"/>
				
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/15/role/BarChartData">
			    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis"/>
				
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_S000008596Member" xlink:label="S000008596Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="S000008596Member" order="16.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ClassAxis" xlink:label="ClassAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000023528Member" xlink:label="C000023528Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000023528Member" order="39.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000023529Member" xlink:label="C000023529Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000023529Member" order="40.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000023530Member" xlink:label="C000023530Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000023530Member" order="41.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis"/>
				
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/15/role/PerformanceTableData">
			    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis"/>
				
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ClassAxis" xlink:label="ClassAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000023528Member" xlink:label="C000023528Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000023528Member" order="39.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000023529Member" xlink:label="C000023529Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000023529Member" order="40.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000023530Member" xlink:label="C000023530Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000023530Member" order="41.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceMeasureDomain" xlink:label="PerformanceMeasureDomain"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_MSCIEmergingMarketsInvestableMarketIndexNetMember" xlink:label="MSCIEmergingMarketsInvestableMarketIndexNetMember"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="PerformanceMeasureDomain" xlink:to="MSCIEmergingMarketsInvestableMarketIndexNetMember" order="27.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis"/>
				
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/15/role/PerformanceManagement">			   
			    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis"/>
				
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_S000008596Member" xlink:label="S000008596Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="S000008596Member" order="16.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>			
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ClassAxis" xlink:label="ClassAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000023528Member" xlink:label="C000023528Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000023528Member" order="39.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000023529Member" xlink:label="C000023529Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000023529Member" order="40.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000023530Member" xlink:label="C000023530Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000023530Member" order="41.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis"/>
				
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/15/role/InvestmentRisks">
			    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis"/>
				
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_S000008596Member" xlink:label="S000008596Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="S000008596Member" order="16.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AllRisksMember" xlink:label="AllRisksMember"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_MarketRisksMember" xlink:label="MarketRisksMember"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="AllRisksMember" xlink:to="MarketRisksMember" order="139.0" preferredLabel="http://www.xbrl.org/2003/role/label"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_ForeignInvestmentRiskMember" xlink:label="ForeignInvestmentRiskMember"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="AllRisksMember" xlink:to="ForeignInvestmentRiskMember" order="140.0" preferredLabel="http://www.xbrl.org/2003/role/label"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_CurrencyRiskMember" xlink:label="CurrencyRiskMember"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="AllRisksMember" xlink:to="CurrencyRiskMember" order="141.0" preferredLabel="http://www.xbrl.org/2003/role/label"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_EmergingMarketsRiskMember" xlink:label="EmergingMarketsRiskMember"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="AllRisksMember" xlink:to="EmergingMarketsRiskMember" order="142.0" preferredLabel="http://www.xbrl.org/2003/role/label"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_GeographicRiskMember" xlink:label="GeographicRiskMember"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="AllRisksMember" xlink:to="GeographicRiskMember" order="143.0" preferredLabel="http://www.xbrl.org/2003/role/label"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_SmallerCompanyRiskMember" xlink:label="SmallerCompanyRiskMember"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="AllRisksMember" xlink:to="SmallerCompanyRiskMember" order="144.0" preferredLabel="http://www.xbrl.org/2003/role/label"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_ShareOwnershipConcentrationRiskMember" xlink:label="ShareOwnershipConcentrationRiskMember"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="AllRisksMember" xlink:to="ShareOwnershipConcentrationRiskMember" order="145.0" preferredLabel="http://www.xbrl.org/2003/role/label"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_StyleRiskMember" xlink:label="StyleRiskMember"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="AllRisksMember" xlink:to="StyleRiskMember" order="146.0" preferredLabel="http://www.xbrl.org/2003/role/label"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_LiquidityRiskMember" xlink:label="LiquidityRiskMember"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="AllRisksMember" xlink:to="LiquidityRiskMember" order="147.0" preferredLabel="http://www.xbrl.org/2003/role/label"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_FocusRiskMember" xlink:label="FocusRiskMember"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="AllRisksMember" xlink:to="FocusRiskMember" order="148.0" preferredLabel="http://www.xbrl.org/2003/role/label"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_OperationalAndTechnologyRiskMember" xlink:label="OperationalAndTechnologyRiskMember"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="AllRisksMember" xlink:to="OperationalAndTechnologyRiskMember" order="149.0" preferredLabel="http://www.xbrl.org/2003/role/label"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_EquityFundsGeneralRiskMember" xlink:label="EquityFundsGeneralRiskMember"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="AllRisksMember" xlink:to="EquityFundsGeneralRiskMember" order="150.0" preferredLabel="http://www.xbrl.org/2003/role/label"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis"/>
				
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/15/role/InvestmentStrategy">
			    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis"/>
				
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_S000008596Member" xlink:label="S000008596Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="S000008596Member" order="16.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis"/>
				
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/15/role/FeesAndExpenses">
			    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis"/>
				
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_S000008596Member" xlink:label="S000008596Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="S000008596Member" order="16.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis"/>
				
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/15/role/N1aCover">
			    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis"/>
								
			</link:presentationLink>
            <link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/15/role/N1aSupplement">
			    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis"/>
							
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_S000008596Member" xlink:label="S000008596Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="S000008596Member" order="16.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ClassAxis" xlink:label="ClassAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000023528Member" xlink:label="C000023528Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000023528Member" order="39.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000023529Member" xlink:label="C000023529Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000023529Member" order="40.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000023530Member" xlink:label="C000023530Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000023530Member" order="41.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis"/>
				
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://xbrl.sec.gov/rr/role/InvestmentStrategy">
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis"/>
				
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_S000008596Member" xlink:label="S000008596Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="S000008596Member" order="16.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/16/role/RiskReturn">
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis"/>
				
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis"/>				
 				<link:loc xlink:type="locator" xlink:href="#wbf_S000075390Member" xlink:label="S000075390Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="S000075390Member" order="17.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis"/>
				
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/16/role/ShareholderFeesData">
			    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis"/>
				
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_S000075390Member" xlink:label="S000075390Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="S000075390Member" order="17.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ClassAxis" xlink:label="ClassAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000234384Member" xlink:label="C000234384Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000234384Member" order="42.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000234385Member" xlink:label="C000234385Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000234385Member" order="43.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis"/>
				
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/16/role/OperatingExpensesData">
			    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis"/>
				
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_S000075390Member" xlink:label="S000075390Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="S000075390Member" order="17.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ClassAxis" xlink:label="ClassAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000234384Member" xlink:label="C000234384Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000234384Member" order="42.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000234385Member" xlink:label="C000234385Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000234385Member" order="43.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis"/>
				
			</link:presentationLink>
		    <link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/16/role/ExpenseExample">
			    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis"/>
				
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_S000075390Member" xlink:label="S000075390Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="S000075390Member" order="17.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ClassAxis" xlink:label="ClassAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000234384Member" xlink:label="C000234384Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000234384Member" order="42.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000234385Member" xlink:label="C000234385Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000234385Member" order="43.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis"/>
				
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/16/role/ExpenseExampleNoRedemption">
			    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis"/>
				
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_S000075390Member" xlink:label="S000075390Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="S000075390Member" order="17.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ClassAxis" xlink:label="ClassAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000234384Member" xlink:label="C000234384Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000234384Member" order="42.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000234385Member" xlink:label="C000234385Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000234385Member" order="43.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis"/>
				
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/16/role/BarChartData">
			    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis"/>
				
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_S000075390Member" xlink:label="S000075390Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="S000075390Member" order="17.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ClassAxis" xlink:label="ClassAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000234384Member" xlink:label="C000234384Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000234384Member" order="42.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000234385Member" xlink:label="C000234385Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000234385Member" order="43.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis"/>
				
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/16/role/PerformanceTableData">
			    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis"/>
				
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ClassAxis" xlink:label="ClassAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000234384Member" xlink:label="C000234384Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000234384Member" order="42.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000234385Member" xlink:label="C000234385Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000234385Member" order="43.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceMeasureDomain" xlink:label="PerformanceMeasureDomain"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_MSCIEmergingMarketsExChinaIMIMember" xlink:label="MSCIEmergingMarketsExChinaIMIMember"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="PerformanceMeasureDomain" xlink:to="MSCIEmergingMarketsExChinaIMIMember" order="28.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis"/>
				
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/16/role/PerformanceManagement">			   
			    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis"/>
				
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_S000075390Member" xlink:label="S000075390Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="S000075390Member" order="17.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>			
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ClassAxis" xlink:label="ClassAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000234384Member" xlink:label="C000234384Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000234384Member" order="42.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000234385Member" xlink:label="C000234385Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000234385Member" order="43.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis"/>
				
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/16/role/InvestmentRisks">
			    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis"/>
				
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_S000075390Member" xlink:label="S000075390Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="S000075390Member" order="17.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AllRisksMember" xlink:label="AllRisksMember"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_MarketRisksMember" xlink:label="MarketRisksMember"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="AllRisksMember" xlink:to="MarketRisksMember" order="151.0" preferredLabel="http://www.xbrl.org/2003/role/label"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_ForeignInvestmentRiskMember" xlink:label="ForeignInvestmentRiskMember"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="AllRisksMember" xlink:to="ForeignInvestmentRiskMember" order="152.0" preferredLabel="http://www.xbrl.org/2003/role/label"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_CurrencyRiskMember" xlink:label="CurrencyRiskMember"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="AllRisksMember" xlink:to="CurrencyRiskMember" order="153.0" preferredLabel="http://www.xbrl.org/2003/role/label"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_EmergingMarketsRiskMember" xlink:label="EmergingMarketsRiskMember"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="AllRisksMember" xlink:to="EmergingMarketsRiskMember" order="154.0" preferredLabel="http://www.xbrl.org/2003/role/label"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_GeographicRiskMember" xlink:label="GeographicRiskMember"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="AllRisksMember" xlink:to="GeographicRiskMember" order="155.0" preferredLabel="http://www.xbrl.org/2003/role/label"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_SmallerCompanyRiskMember" xlink:label="SmallerCompanyRiskMember"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="AllRisksMember" xlink:to="SmallerCompanyRiskMember" order="156.0" preferredLabel="http://www.xbrl.org/2003/role/label"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_ShareOwnershipConcentrationRiskMember" xlink:label="ShareOwnershipConcentrationRiskMember"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="AllRisksMember" xlink:to="ShareOwnershipConcentrationRiskMember" order="157.0" preferredLabel="http://www.xbrl.org/2003/role/label"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_StyleRiskMember" xlink:label="StyleRiskMember"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="AllRisksMember" xlink:to="StyleRiskMember" order="158.0" preferredLabel="http://www.xbrl.org/2003/role/label"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_LiquidityRiskMember" xlink:label="LiquidityRiskMember"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="AllRisksMember" xlink:to="LiquidityRiskMember" order="159.0" preferredLabel="http://www.xbrl.org/2003/role/label"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_FocusRiskMember" xlink:label="FocusRiskMember"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="AllRisksMember" xlink:to="FocusRiskMember" order="160.0" preferredLabel="http://www.xbrl.org/2003/role/label"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_OperationalAndTechnologyRiskMember" xlink:label="OperationalAndTechnologyRiskMember"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="AllRisksMember" xlink:to="OperationalAndTechnologyRiskMember" order="161.0" preferredLabel="http://www.xbrl.org/2003/role/label"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_EquityFundsGeneralRiskMember" xlink:label="EquityFundsGeneralRiskMember"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="AllRisksMember" xlink:to="EquityFundsGeneralRiskMember" order="162.0" preferredLabel="http://www.xbrl.org/2003/role/label"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis"/>
				
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/16/role/InvestmentStrategy">
			    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis"/>
				
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_S000075390Member" xlink:label="S000075390Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="S000075390Member" order="17.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis"/>
				
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/16/role/FeesAndExpenses">
			    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis"/>
				
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_S000075390Member" xlink:label="S000075390Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="S000075390Member" order="17.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis"/>
				
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/16/role/N1aCover">
			    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis"/>
								
			</link:presentationLink>
            <link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/16/role/N1aSupplement">
			    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis"/>
							
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_S000075390Member" xlink:label="S000075390Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="S000075390Member" order="17.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ClassAxis" xlink:label="ClassAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000234384Member" xlink:label="C000234384Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000234384Member" order="42.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000234385Member" xlink:label="C000234385Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000234385Member" order="43.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis"/>
				
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://xbrl.sec.gov/rr/role/InvestmentStrategy">
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis"/>
				
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_S000075390Member" xlink:label="S000075390Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="S000075390Member" order="17.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/17/role/RiskReturn">
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis"/>
				
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis"/>				
 				<link:loc xlink:type="locator" xlink:href="#wbf_S000034349Member" xlink:label="S000034349Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="S000034349Member" order="18.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis"/>
				
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/17/role/ShareholderFeesData">
			    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis"/>
				
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_S000034349Member" xlink:label="S000034349Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="S000034349Member" order="18.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ClassAxis" xlink:label="ClassAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000105753Member" xlink:label="C000105753Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000105753Member" order="44.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000105754Member" xlink:label="C000105754Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000105754Member" order="45.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000105755Member" xlink:label="C000105755Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000105755Member" order="46.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis"/>
				
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/17/role/OperatingExpensesData">
			    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis"/>
				
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_S000034349Member" xlink:label="S000034349Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="S000034349Member" order="18.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ClassAxis" xlink:label="ClassAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000105753Member" xlink:label="C000105753Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000105753Member" order="44.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000105754Member" xlink:label="C000105754Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000105754Member" order="45.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000105755Member" xlink:label="C000105755Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000105755Member" order="46.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis"/>
				
			</link:presentationLink>
		    <link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/17/role/ExpenseExample">
			    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis"/>
				
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_S000034349Member" xlink:label="S000034349Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="S000034349Member" order="18.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ClassAxis" xlink:label="ClassAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000105753Member" xlink:label="C000105753Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000105753Member" order="44.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000105754Member" xlink:label="C000105754Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000105754Member" order="45.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000105755Member" xlink:label="C000105755Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000105755Member" order="46.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis"/>
				
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/17/role/ExpenseExampleNoRedemption">
			    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis"/>
				
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_S000034349Member" xlink:label="S000034349Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="S000034349Member" order="18.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ClassAxis" xlink:label="ClassAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000105753Member" xlink:label="C000105753Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000105753Member" order="44.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000105754Member" xlink:label="C000105754Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000105754Member" order="45.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000105755Member" xlink:label="C000105755Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000105755Member" order="46.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis"/>
				
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/17/role/BarChartData">
			    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis"/>
				
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_S000034349Member" xlink:label="S000034349Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="S000034349Member" order="18.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ClassAxis" xlink:label="ClassAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000105753Member" xlink:label="C000105753Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000105753Member" order="44.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000105754Member" xlink:label="C000105754Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000105754Member" order="45.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000105755Member" xlink:label="C000105755Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000105755Member" order="46.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis"/>
				
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/17/role/PerformanceTableData">
			    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis"/>
				
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ClassAxis" xlink:label="ClassAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000105753Member" xlink:label="C000105753Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000105753Member" order="44.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000105754Member" xlink:label="C000105754Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000105754Member" order="45.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000105755Member" xlink:label="C000105755Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000105755Member" order="46.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceMeasureDomain" xlink:label="PerformanceMeasureDomain"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_MSCIEmergingMarketsIMIMember" xlink:label="MSCIEmergingMarketsIMIMember"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="PerformanceMeasureDomain" xlink:to="MSCIEmergingMarketsIMIMember" order="29.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_MSCIEmergingMarketsSmallCapIndexMember" xlink:label="MSCIEmergingMarketsSmallCapIndexMember"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="PerformanceMeasureDomain" xlink:to="MSCIEmergingMarketsSmallCapIndexMember" order="30.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis"/>
				
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/17/role/PerformanceManagement">			   
			    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis"/>
				
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_S000034349Member" xlink:label="S000034349Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="S000034349Member" order="18.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>			
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ClassAxis" xlink:label="ClassAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000105753Member" xlink:label="C000105753Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000105753Member" order="44.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000105754Member" xlink:label="C000105754Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000105754Member" order="45.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000105755Member" xlink:label="C000105755Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000105755Member" order="46.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis"/>
				
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/17/role/InvestmentRisks">
			    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis"/>
				
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_S000034349Member" xlink:label="S000034349Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="S000034349Member" order="18.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AllRisksMember" xlink:label="AllRisksMember"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_MarketRisksMember" xlink:label="MarketRisksMember"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="AllRisksMember" xlink:to="MarketRisksMember" order="163.0" preferredLabel="http://www.xbrl.org/2003/role/label"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_ForeignInvestmentRiskMember" xlink:label="ForeignInvestmentRiskMember"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="AllRisksMember" xlink:to="ForeignInvestmentRiskMember" order="164.0" preferredLabel="http://www.xbrl.org/2003/role/label"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_CurrencyRiskMember" xlink:label="CurrencyRiskMember"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="AllRisksMember" xlink:to="CurrencyRiskMember" order="165.0" preferredLabel="http://www.xbrl.org/2003/role/label"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_EmergingMarketsRiskMember" xlink:label="EmergingMarketsRiskMember"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="AllRisksMember" xlink:to="EmergingMarketsRiskMember" order="166.0" preferredLabel="http://www.xbrl.org/2003/role/label"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_GeographicRiskMember" xlink:label="GeographicRiskMember"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="AllRisksMember" xlink:to="GeographicRiskMember" order="167.0" preferredLabel="http://www.xbrl.org/2003/role/label"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_SmallAndMicroCapCompanyRiskMember" xlink:label="SmallAndMicroCapCompanyRiskMember"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="AllRisksMember" xlink:to="SmallAndMicroCapCompanyRiskMember" order="168.0" preferredLabel="http://www.xbrl.org/2003/role/label"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_PortfolioTurnoverRateRiskMember" xlink:label="PortfolioTurnoverRateRiskMember"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="AllRisksMember" xlink:to="PortfolioTurnoverRateRiskMember" order="169.0" preferredLabel="http://www.xbrl.org/2003/role/label"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_ShareOwnershipConcentrationRiskMember" xlink:label="ShareOwnershipConcentrationRiskMember"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="AllRisksMember" xlink:to="ShareOwnershipConcentrationRiskMember" order="170.0" preferredLabel="http://www.xbrl.org/2003/role/label"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_StyleRiskMember" xlink:label="StyleRiskMember"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="AllRisksMember" xlink:to="StyleRiskMember" order="171.0" preferredLabel="http://www.xbrl.org/2003/role/label"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_LiquidityRiskMember" xlink:label="LiquidityRiskMember"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="AllRisksMember" xlink:to="LiquidityRiskMember" order="172.0" preferredLabel="http://www.xbrl.org/2003/role/label"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_FocusRiskMember" xlink:label="FocusRiskMember"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="AllRisksMember" xlink:to="FocusRiskMember" order="173.0" preferredLabel="http://www.xbrl.org/2003/role/label"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_OperationalAndTechnologyRiskMember" xlink:label="OperationalAndTechnologyRiskMember"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="AllRisksMember" xlink:to="OperationalAndTechnologyRiskMember" order="174.0" preferredLabel="http://www.xbrl.org/2003/role/label"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_EquityFundsGeneralRiskMember" xlink:label="EquityFundsGeneralRiskMember"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="AllRisksMember" xlink:to="EquityFundsGeneralRiskMember" order="175.0" preferredLabel="http://www.xbrl.org/2003/role/label"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis"/>
				
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/17/role/InvestmentStrategy">
			    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis"/>
				
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_S000034349Member" xlink:label="S000034349Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="S000034349Member" order="18.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis"/>
				
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/17/role/FeesAndExpenses">
			    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis"/>
				
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_S000034349Member" xlink:label="S000034349Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="S000034349Member" order="18.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis"/>
				
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/17/role/N1aCover">
			    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis"/>
								
			</link:presentationLink>
            <link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/17/role/N1aSupplement">
			    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis"/>
							
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_S000034349Member" xlink:label="S000034349Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="S000034349Member" order="18.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ClassAxis" xlink:label="ClassAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000105753Member" xlink:label="C000105753Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000105753Member" order="44.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000105754Member" xlink:label="C000105754Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000105754Member" order="45.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000105755Member" xlink:label="C000105755Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000105755Member" order="46.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis"/>
				
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://xbrl.sec.gov/rr/role/InvestmentStrategy">
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis"/>
				
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_S000034349Member" xlink:label="S000034349Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="S000034349Member" order="18.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/18/role/RiskReturn">
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis"/>
				
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis"/>				
 				<link:loc xlink:type="locator" xlink:href="#wbf_S000072753Member" xlink:label="S000072753Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="S000072753Member" order="19.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis"/>
				
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/18/role/ShareholderFeesData">
			    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis"/>
				
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_S000072753Member" xlink:label="S000072753Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="S000072753Member" order="19.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ClassAxis" xlink:label="ClassAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000229252Member" xlink:label="C000229252Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000229252Member" order="47.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000229253Member" xlink:label="C000229253Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000229253Member" order="48.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis"/>
				
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/18/role/OperatingExpensesData">
			    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis"/>
				
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_S000072753Member" xlink:label="S000072753Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="S000072753Member" order="19.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ClassAxis" xlink:label="ClassAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000229252Member" xlink:label="C000229252Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000229252Member" order="47.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000229253Member" xlink:label="C000229253Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000229253Member" order="48.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis"/>
				
			</link:presentationLink>
		    <link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/18/role/ExpenseExample">
			    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis"/>
				
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_S000072753Member" xlink:label="S000072753Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="S000072753Member" order="19.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ClassAxis" xlink:label="ClassAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000229252Member" xlink:label="C000229252Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000229252Member" order="47.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000229253Member" xlink:label="C000229253Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000229253Member" order="48.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis"/>
				
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/18/role/ExpenseExampleNoRedemption">
			    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis"/>
				
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_S000072753Member" xlink:label="S000072753Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="S000072753Member" order="19.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ClassAxis" xlink:label="ClassAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000229252Member" xlink:label="C000229252Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000229252Member" order="47.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000229253Member" xlink:label="C000229253Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000229253Member" order="48.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis"/>
				
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/18/role/BarChartData">
			    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis"/>
				
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_S000072753Member" xlink:label="S000072753Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="S000072753Member" order="19.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ClassAxis" xlink:label="ClassAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000229252Member" xlink:label="C000229252Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000229252Member" order="47.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000229253Member" xlink:label="C000229253Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000229253Member" order="48.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis"/>
				
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/18/role/PerformanceTableData">
			    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis"/>
				
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ClassAxis" xlink:label="ClassAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000229252Member" xlink:label="C000229252Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000229252Member" order="47.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000229253Member" xlink:label="C000229253Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000229253Member" order="48.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceMeasureDomain" xlink:label="PerformanceMeasureDomain"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_MSCIChinaAllSharesIndexMember" xlink:label="MSCIChinaAllSharesIndexMember"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="PerformanceMeasureDomain" xlink:to="MSCIChinaAllSharesIndexMember" order="31.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis"/>
				
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/18/role/PerformanceManagement">			   
			    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis"/>
				
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_S000072753Member" xlink:label="S000072753Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="S000072753Member" order="19.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>			
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ClassAxis" xlink:label="ClassAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000229252Member" xlink:label="C000229252Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000229252Member" order="47.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000229253Member" xlink:label="C000229253Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000229253Member" order="48.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis"/>
				
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/18/role/InvestmentRisks">
			    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis"/>
				
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_S000072753Member" xlink:label="S000072753Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="S000072753Member" order="19.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AllRisksMember" xlink:label="AllRisksMember"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_InvestingThroughStockConnectRiskMember" xlink:label="InvestingThroughStockConnectRiskMember"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="AllRisksMember" xlink:to="InvestingThroughStockConnectRiskMember" order="176.0" preferredLabel="http://www.xbrl.org/2003/role/label"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_EquityFundsGeneralRiskMember" xlink:label="EquityFundsGeneralRiskMember"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="AllRisksMember" xlink:to="EquityFundsGeneralRiskMember" order="177.0" preferredLabel="http://www.xbrl.org/2003/role/label"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_ForeignInvestmentRiskMember" xlink:label="ForeignInvestmentRiskMember"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="AllRisksMember" xlink:to="ForeignInvestmentRiskMember" order="178.0" preferredLabel="http://www.xbrl.org/2003/role/label"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_EmergingMarketsRiskMember" xlink:label="EmergingMarketsRiskMember"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="AllRisksMember" xlink:to="EmergingMarketsRiskMember" order="179.0" preferredLabel="http://www.xbrl.org/2003/role/label"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_MarketRisksMember" xlink:label="MarketRisksMember"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="AllRisksMember" xlink:to="MarketRisksMember" order="180.0" preferredLabel="http://www.xbrl.org/2003/role/label"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_CurrencyRiskMember" xlink:label="CurrencyRiskMember"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="AllRisksMember" xlink:to="CurrencyRiskMember" order="181.0" preferredLabel="http://www.xbrl.org/2003/role/label"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_FocusRiskMember" xlink:label="FocusRiskMember"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="AllRisksMember" xlink:to="FocusRiskMember" order="182.0" preferredLabel="http://www.xbrl.org/2003/role/label"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_LiquidityRiskMember" xlink:label="LiquidityRiskMember"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="AllRisksMember" xlink:to="LiquidityRiskMember" order="183.0" preferredLabel="http://www.xbrl.org/2003/role/label"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_OperationalAndTechnologyRiskMember" xlink:label="OperationalAndTechnologyRiskMember"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="AllRisksMember" xlink:to="OperationalAndTechnologyRiskMember" order="184.0" preferredLabel="http://www.xbrl.org/2003/role/label"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_ShareOwnershipConcentrationRiskMember" xlink:label="ShareOwnershipConcentrationRiskMember"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="AllRisksMember" xlink:to="ShareOwnershipConcentrationRiskMember" order="185.0" preferredLabel="http://www.xbrl.org/2003/role/label"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_SmallerCompanyRiskMember" xlink:label="SmallerCompanyRiskMember"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="AllRisksMember" xlink:to="SmallerCompanyRiskMember" order="186.0" preferredLabel="http://www.xbrl.org/2003/role/label"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_StyleRiskMember" xlink:label="StyleRiskMember"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="AllRisksMember" xlink:to="StyleRiskMember" order="187.0" preferredLabel="http://www.xbrl.org/2003/role/label"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_ChineseInvestmentRiskMember" xlink:label="ChineseInvestmentRiskMember"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="AllRisksMember" xlink:to="ChineseInvestmentRiskMember" order="188.0" preferredLabel="http://www.xbrl.org/2003/role/label"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis"/>
				
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/18/role/InvestmentStrategy">
			    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis"/>
				
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_S000072753Member" xlink:label="S000072753Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="S000072753Member" order="19.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis"/>
				
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/18/role/FeesAndExpenses">
			    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis"/>
				
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_S000072753Member" xlink:label="S000072753Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="S000072753Member" order="19.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis"/>
				
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/18/role/N1aCover">
			    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis"/>
								
			</link:presentationLink>
            <link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/18/role/N1aSupplement">
			    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis"/>
							
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_S000072753Member" xlink:label="S000072753Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="S000072753Member" order="19.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ClassAxis" xlink:label="ClassAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000229252Member" xlink:label="C000229252Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000229252Member" order="47.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000229253Member" xlink:label="C000229253Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000229253Member" order="48.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis"/>
				
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://xbrl.sec.gov/rr/role/InvestmentStrategy">
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis"/>
				
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_S000072753Member" xlink:label="S000072753Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="S000072753Member" order="19.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/19/role/RiskReturn">
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis"/>
				
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis"/>				
 				<link:loc xlink:type="locator" xlink:href="#wbf_S000069167Member" xlink:label="S000069167Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="S000069167Member" order="20.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis"/>
				
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/19/role/ShareholderFeesData">
			    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis"/>
				
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_S000069167Member" xlink:label="S000069167Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="S000069167Member" order="20.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ClassAxis" xlink:label="ClassAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000221008Member" xlink:label="C000221008Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000221008Member" order="49.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000221009Member" xlink:label="C000221009Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000221009Member" order="50.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis"/>
				
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/19/role/OperatingExpensesData">
			    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis"/>
				
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_S000069167Member" xlink:label="S000069167Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="S000069167Member" order="20.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ClassAxis" xlink:label="ClassAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000221008Member" xlink:label="C000221008Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000221008Member" order="49.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000221009Member" xlink:label="C000221009Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000221009Member" order="50.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis"/>
				
			</link:presentationLink>
		    <link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/19/role/ExpenseExample">
			    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis"/>
				
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_S000069167Member" xlink:label="S000069167Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="S000069167Member" order="20.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ClassAxis" xlink:label="ClassAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000221008Member" xlink:label="C000221008Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000221008Member" order="49.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000221009Member" xlink:label="C000221009Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000221009Member" order="50.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis"/>
				
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/19/role/ExpenseExampleNoRedemption">
			    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis"/>
				
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_S000069167Member" xlink:label="S000069167Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="S000069167Member" order="20.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ClassAxis" xlink:label="ClassAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000221008Member" xlink:label="C000221008Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000221008Member" order="49.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000221009Member" xlink:label="C000221009Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000221009Member" order="50.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis"/>
				
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/19/role/BarChartData">
			    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis"/>
				
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_S000069167Member" xlink:label="S000069167Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="S000069167Member" order="20.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ClassAxis" xlink:label="ClassAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000221008Member" xlink:label="C000221008Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000221008Member" order="49.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000221009Member" xlink:label="C000221009Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000221009Member" order="50.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis"/>
				
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/19/role/PerformanceTableData">
			    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis"/>
				
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ClassAxis" xlink:label="ClassAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000221008Member" xlink:label="C000221008Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000221008Member" order="49.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000221009Member" xlink:label="C000221009Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000221009Member" order="50.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceMeasureDomain" xlink:label="PerformanceMeasureDomain"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_BloombergGlobalAggregateIndexMember" xlink:label="BloombergGlobalAggregateIndexMember"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="PerformanceMeasureDomain" xlink:to="BloombergGlobalAggregateIndexMember" order="32.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_JPMorganEMBIGlobalDiversifiedMember" xlink:label="JPMorganEMBIGlobalDiversifiedMember"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="PerformanceMeasureDomain" xlink:to="JPMorganEMBIGlobalDiversifiedMember" order="33.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis"/>
				
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/19/role/PerformanceManagement">			   
			    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis"/>
				
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_S000069167Member" xlink:label="S000069167Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="S000069167Member" order="20.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>			
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ClassAxis" xlink:label="ClassAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000221008Member" xlink:label="C000221008Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000221008Member" order="49.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000221009Member" xlink:label="C000221009Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000221009Member" order="50.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis"/>
				
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/19/role/InvestmentRisks">
			    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis"/>
				
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_S000069167Member" xlink:label="S000069167Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="S000069167Member" order="20.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AllRisksMember" xlink:label="AllRisksMember"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CreditRiskMember" xlink:label="CreditRiskMember"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="AllRisksMember" xlink:to="CreditRiskMember" order="189.0" />
				<link:loc xlink:type="locator" xlink:href="#wbf_ForeignInvestmentRiskMember" xlink:label="ForeignInvestmentRiskMember"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="AllRisksMember" xlink:to="ForeignInvestmentRiskMember" order="190.0" preferredLabel="http://www.xbrl.org/2003/role/label"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_EmergingMarketsRiskMember" xlink:label="EmergingMarketsRiskMember"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="AllRisksMember" xlink:to="EmergingMarketsRiskMember" order="191.0" preferredLabel="http://www.xbrl.org/2003/role/label"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_SovereignAndQuasiSovereignDefaultRiskMember" xlink:label="SovereignAndQuasiSovereignDefaultRiskMember"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="AllRisksMember" xlink:to="SovereignAndQuasiSovereignDefaultRiskMember" order="192.0" preferredLabel="http://www.xbrl.org/2003/role/label"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InterestRateRiskMember" xlink:label="InterestRateRiskMember"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="AllRisksMember" xlink:to="InterestRateRiskMember" order="193.0" />
				<link:loc xlink:type="locator" xlink:href="#wbf_AggressiveInvestmentTechniqueRiskMember" xlink:label="AggressiveInvestmentTechniqueRiskMember"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="AllRisksMember" xlink:to="AggressiveInvestmentTechniqueRiskMember" order="194.0" preferredLabel="http://www.xbrl.org/2003/role/label"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_CounterpartyAndContractualDefaultRiskMember" xlink:label="CounterpartyAndContractualDefaultRiskMember"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="AllRisksMember" xlink:to="CounterpartyAndContractualDefaultRiskMember" order="195.0" preferredLabel="http://www.xbrl.org/2003/role/label"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_CreditDefaultSwapRiskMember" xlink:label="CreditDefaultSwapRiskMember"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="AllRisksMember" xlink:to="CreditDefaultSwapRiskMember" order="196.0" preferredLabel="http://www.xbrl.org/2003/role/label"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_CurrencyRiskMember" xlink:label="CurrencyRiskMember"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="AllRisksMember" xlink:to="CurrencyRiskMember" order="197.0" preferredLabel="http://www.xbrl.org/2003/role/label"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_DerivativesRisksMember" xlink:label="DerivativesRisksMember"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="AllRisksMember" xlink:to="DerivativesRisksMember" order="198.0" preferredLabel="http://www.xbrl.org/2003/role/label"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_DistressedDebtRiskMember" xlink:label="DistressedDebtRiskMember"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="AllRisksMember" xlink:to="DistressedDebtRiskMember" order="199.0" preferredLabel="http://www.xbrl.org/2003/role/label"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_FloatingAndVariableRateSecuritiesRiskMember" xlink:label="FloatingAndVariableRateSecuritiesRiskMember"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="AllRisksMember" xlink:to="FloatingAndVariableRateSecuritiesRiskMember" order="200.0" preferredLabel="http://www.xbrl.org/2003/role/label"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_GeographicRiskMember" xlink:label="GeographicRiskMember"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="AllRisksMember" xlink:to="GeographicRiskMember" order="201.0" preferredLabel="http://www.xbrl.org/2003/role/label"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_GovernmentAndRegulatoryRiskMember" xlink:label="GovernmentAndRegulatoryRiskMember"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="AllRisksMember" xlink:to="GovernmentAndRegulatoryRiskMember" order="202.0" preferredLabel="http://www.xbrl.org/2003/role/label"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_HighYieldSecuritiesRiskMember" xlink:label="HighYieldSecuritiesRiskMember"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="AllRisksMember" xlink:to="HighYieldSecuritiesRiskMember" order="203.0" preferredLabel="http://www.xbrl.org/2003/role/label"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_IncomeRiskMember" xlink:label="IncomeRiskMember"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="AllRisksMember" xlink:to="IncomeRiskMember" order="204.0" preferredLabel="http://www.xbrl.org/2003/role/label"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_LeverageRiskMember" xlink:label="LeverageRiskMember"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="AllRisksMember" xlink:to="LeverageRiskMember" order="205.0" preferredLabel="http://www.xbrl.org/2003/role/label"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_LiquidityRiskMember" xlink:label="LiquidityRiskMember"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="AllRisksMember" xlink:to="LiquidityRiskMember" order="206.0" preferredLabel="http://www.xbrl.org/2003/role/label"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_OperationalAndTechnologyRiskMember" xlink:label="OperationalAndTechnologyRiskMember"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="AllRisksMember" xlink:to="OperationalAndTechnologyRiskMember" order="207.0" preferredLabel="http://www.xbrl.org/2003/role/label"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_PortfolioTurnoverRateRiskMember" xlink:label="PortfolioTurnoverRateRiskMember"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="AllRisksMember" xlink:to="PortfolioTurnoverRateRiskMember" order="208.0" preferredLabel="http://www.xbrl.org/2003/role/label"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_PrivatePlacementRiskMember" xlink:label="PrivatePlacementRiskMember"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="AllRisksMember" xlink:to="PrivatePlacementRiskMember" order="209.0" preferredLabel="http://www.xbrl.org/2003/role/label"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_ShareOwnershipConcentrationRiskMember" xlink:label="ShareOwnershipConcentrationRiskMember"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="AllRisksMember" xlink:to="ShareOwnershipConcentrationRiskMember" order="210.0" preferredLabel="http://www.xbrl.org/2003/role/label"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_MarketRisksMember" xlink:label="MarketRisksMember"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="AllRisksMember" xlink:to="MarketRisksMember" order="211.0" preferredLabel="http://www.xbrl.org/2003/role/label"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis"/>
				
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/19/role/InvestmentStrategy">
			    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis"/>
				
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_S000069167Member" xlink:label="S000069167Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="S000069167Member" order="20.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis"/>
				
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/19/role/FeesAndExpenses">
			    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis"/>
				
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_S000069167Member" xlink:label="S000069167Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="S000069167Member" order="20.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis"/>
				
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/19/role/N1aCover">
			    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis"/>
								
			</link:presentationLink>
            <link:presentationLink xlink:type="extended" xlink:role="http://www.williamblairfunds.com/19/role/N1aSupplement">
			    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis"/>
							
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_S000069167Member" xlink:label="S000069167Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="S000069167Member" order="20.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ClassAxis" xlink:label="ClassAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000221008Member" xlink:label="C000221008Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000221008Member" order="49.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000221009Member" xlink:label="C000221009Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ClassAxis" xlink:to="C000221009Member" order="50.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CoregistrantAxis" xlink:label="CoregistrantAxis"/>
				
			</link:presentationLink>
			<link:presentationLink xlink:type="extended" xlink:role="http://xbrl.sec.gov/rr/role/InvestmentStrategy">
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis" xlink:label="DocumentInformationDocumentAxis"/>
				
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_S000069167Member" xlink:label="S000069167Member"/>
				<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="LegalEntityAxis" xlink:to="S000069167Member" order="20.0" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
			</link:presentationLink>
			
            <!--PresentationLink Dynamic End-->
            <link:roleRef roleURI="http://xbrl.sec.gov/rr/role/ProspectusOnly" xlink:type="simple" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#ProspectusOnly"/>
            <link:roleRef roleURI="http://xbrl.sec.gov/oef/role/SeriesOnly" xlink:type="simple" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#SeriesOnly"/>
            <link:roleRef roleURI="http://xbrl.sec.gov/oef/role/ClassOnly" xlink:type="simple" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#ClassOnly"/>
            <link:roleRef roleURI="http://xbrl.sec.gov/rr/role/PerformanceMeasureOnly" xlink:type="simple" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#PerformanceMeasureOnly"/>
            <link:roleRef roleURI="http://xbrl.sec.gov/rr/role/RiskOnly" xlink:type="simple" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#RiskOnly"/>
            <link:roleRef roleURI="http://xbrl.sec.gov/oef/role/CoregistrantOnly" xlink:type="simple" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#CoregistrantOnly"/>
            <link:arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#hypercube-dimension"/>
            <link:arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#dimension-domain"/>
            <link:arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/domain-member" xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#domain-member"/>
            <link:arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/all" xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#all"/>
            <link:arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/notAll" xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#notAll"/>
            <link:arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#dimension-default"/>
			<link:definitionLink xlink:type="extended" xlink:role="http://xbrl.sec.gov/oef/role/SeriesOnly">
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityDomain" xlink:label="EntityDomain"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_S000008594Member" xlink:label="S000008594Member"/>
				<link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="EntityDomain" xlink:to="S000008594Member" order="1.0"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_S000008601Member" xlink:label="S000008601Member"/>
				<link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="EntityDomain" xlink:to="S000008601Member" order="2.0"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_S000075391Member" xlink:label="S000075391Member"/>
				<link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="EntityDomain" xlink:to="S000075391Member" order="3.0"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_S000066499Member" xlink:label="S000066499Member"/>
				<link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="EntityDomain" xlink:to="S000066499Member" order="4.0"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_S000008603Member" xlink:label="S000008603Member"/>
				<link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="EntityDomain" xlink:to="S000008603Member" order="5.0"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_S000080810Member" xlink:label="S000080810Member"/>
				<link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="EntityDomain" xlink:to="S000080810Member" order="6.0"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_S000008602Member" xlink:label="S000008602Member"/>
				<link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="EntityDomain" xlink:to="S000008602Member" order="7.0"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_S000008597Member" xlink:label="S000008597Member"/>
				<link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="EntityDomain" xlink:to="S000008597Member" order="8.0"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_S000019315Member" xlink:label="S000019315Member"/>
				<link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="EntityDomain" xlink:to="S000019315Member" order="9.0"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_S000037763Member" xlink:label="S000037763Member"/>
				<link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="EntityDomain" xlink:to="S000037763Member" order="10.0"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_S000008604Member" xlink:label="S000008604Member"/>
				<link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="EntityDomain" xlink:to="S000008604Member" order="11.0"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_S000008605Member" xlink:label="S000008605Member"/>
				<link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="EntityDomain" xlink:to="S000008605Member" order="12.0"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_S000008595Member" xlink:label="S000008595Member"/>
				<link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="EntityDomain" xlink:to="S000008595Member" order="13.0"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_S000021052Member" xlink:label="S000021052Member"/>
				<link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="EntityDomain" xlink:to="S000021052Member" order="14.0"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_S000008596Member" xlink:label="S000008596Member"/>
				<link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="EntityDomain" xlink:to="S000008596Member" order="15.0"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_S000075390Member" xlink:label="S000075390Member"/>
				<link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="EntityDomain" xlink:to="S000075390Member" order="16.0"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_S000034349Member" xlink:label="S000034349Member"/>
				<link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="EntityDomain" xlink:to="S000034349Member" order="17.0"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_S000072753Member" xlink:label="S000072753Member"/>
				<link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="EntityDomain" xlink:to="S000072753Member" order="18.0"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_S000069167Member" xlink:label="S000069167Member"/>
				<link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="EntityDomain" xlink:to="S000069167Member" order="19.0"/>
			</link:definitionLink>
			<link:definitionLink xlink:type="extended" xlink:role="http://xbrl.sec.gov/oef/role/ClassOnly">
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ShareClassDomain" xlink:label="ShareClassDomain"/>  
				<link:loc xlink:type="locator" xlink:href="#wbf_C000023523Member" xlink:label="C000023523Member"/>
				<link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ShareClassDomain" xlink:to="C000023523Member" order="1.0"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000023524Member" xlink:label="C000023524Member"/>
				<link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ShareClassDomain" xlink:to="C000023524Member" order="2.0"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000211716Member" xlink:label="C000211716Member"/>
				<link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ShareClassDomain" xlink:to="C000211716Member" order="3.0"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000023538Member" xlink:label="C000023538Member"/>
				<link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ShareClassDomain" xlink:to="C000023538Member" order="4.0"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000023539Member" xlink:label="C000023539Member"/>
				<link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ShareClassDomain" xlink:to="C000023539Member" order="5.0"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000211719Member" xlink:label="C000211719Member"/>
				<link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ShareClassDomain" xlink:to="C000211719Member" order="6.0"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000234386Member" xlink:label="C000234386Member"/>
				<link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ShareClassDomain" xlink:to="C000234386Member" order="7.0"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000234387Member" xlink:label="C000234387Member"/>
				<link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ShareClassDomain" xlink:to="C000234387Member" order="8.0"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000214491Member" xlink:label="C000214491Member"/>
				<link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ShareClassDomain" xlink:to="C000214491Member" order="9.0"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000214492Member" xlink:label="C000214492Member"/>
				<link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ShareClassDomain" xlink:to="C000214492Member" order="10.0"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000023542Member" xlink:label="C000023542Member"/>
				<link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ShareClassDomain" xlink:to="C000023542Member" order="11.0"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000023543Member" xlink:label="C000023543Member"/>
				<link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ShareClassDomain" xlink:to="C000023543Member" order="12.0"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000211721Member" xlink:label="C000211721Member"/>
				<link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ShareClassDomain" xlink:to="C000211721Member" order="13.0"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000243363Member" xlink:label="C000243363Member"/>
				<link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ShareClassDomain" xlink:to="C000243363Member" order="14.0"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000243364Member" xlink:label="C000243364Member"/>
				<link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ShareClassDomain" xlink:to="C000243364Member" order="15.0"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000023540Member" xlink:label="C000023540Member"/>
				<link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ShareClassDomain" xlink:to="C000023540Member" order="16.0"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000023541Member" xlink:label="C000023541Member"/>
				<link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ShareClassDomain" xlink:to="C000023541Member" order="17.0"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000211720Member" xlink:label="C000211720Member"/>
				<link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ShareClassDomain" xlink:to="C000211720Member" order="18.0"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000023531Member" xlink:label="C000023531Member"/>
				<link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ShareClassDomain" xlink:to="C000023531Member" order="19.0"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000023532Member" xlink:label="C000023532Member"/>
				<link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ShareClassDomain" xlink:to="C000023532Member" order="20.0"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000211717Member" xlink:label="C000211717Member"/>
				<link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ShareClassDomain" xlink:to="C000211717Member" order="21.0"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000053607Member" xlink:label="C000053607Member"/>
				<link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ShareClassDomain" xlink:to="C000053607Member" order="22.0"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000053608Member" xlink:label="C000053608Member"/>
				<link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ShareClassDomain" xlink:to="C000053608Member" order="23.0"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000053609Member" xlink:label="C000053609Member"/>
				<link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ShareClassDomain" xlink:to="C000053609Member" order="24.0"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000116468Member" xlink:label="C000116468Member"/>
				<link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ShareClassDomain" xlink:to="C000116468Member" order="25.0"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000116469Member" xlink:label="C000116469Member"/>
				<link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ShareClassDomain" xlink:to="C000116469Member" order="26.0"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000116470Member" xlink:label="C000116470Member"/>
				<link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ShareClassDomain" xlink:to="C000116470Member" order="27.0"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000023544Member" xlink:label="C000023544Member"/>
				<link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ShareClassDomain" xlink:to="C000023544Member" order="28.0"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000023545Member" xlink:label="C000023545Member"/>
				<link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ShareClassDomain" xlink:to="C000023545Member" order="29.0"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000211722Member" xlink:label="C000211722Member"/>
				<link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ShareClassDomain" xlink:to="C000211722Member" order="30.0"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000023546Member" xlink:label="C000023546Member"/>
				<link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ShareClassDomain" xlink:to="C000023546Member" order="31.0"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000023525Member" xlink:label="C000023525Member"/>
				<link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ShareClassDomain" xlink:to="C000023525Member" order="32.0"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000023526Member" xlink:label="C000023526Member"/>
				<link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ShareClassDomain" xlink:to="C000023526Member" order="33.0"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000023527Member" xlink:label="C000023527Member"/>
				<link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ShareClassDomain" xlink:to="C000023527Member" order="34.0"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000059867Member" xlink:label="C000059867Member"/>
				<link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ShareClassDomain" xlink:to="C000059867Member" order="35.0"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000059868Member" xlink:label="C000059868Member"/>
				<link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ShareClassDomain" xlink:to="C000059868Member" order="36.0"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000088850Member" xlink:label="C000088850Member"/>
				<link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ShareClassDomain" xlink:to="C000088850Member" order="37.0"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000023528Member" xlink:label="C000023528Member"/>
				<link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ShareClassDomain" xlink:to="C000023528Member" order="38.0"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000023529Member" xlink:label="C000023529Member"/>
				<link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ShareClassDomain" xlink:to="C000023529Member" order="39.0"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000023530Member" xlink:label="C000023530Member"/>
				<link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ShareClassDomain" xlink:to="C000023530Member" order="40.0"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000234384Member" xlink:label="C000234384Member"/>
				<link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ShareClassDomain" xlink:to="C000234384Member" order="41.0"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000234385Member" xlink:label="C000234385Member"/>
				<link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ShareClassDomain" xlink:to="C000234385Member" order="42.0"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000105753Member" xlink:label="C000105753Member"/>
				<link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ShareClassDomain" xlink:to="C000105753Member" order="43.0"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000105754Member" xlink:label="C000105754Member"/>
				<link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ShareClassDomain" xlink:to="C000105754Member" order="44.0"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000105755Member" xlink:label="C000105755Member"/>
				<link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ShareClassDomain" xlink:to="C000105755Member" order="45.0"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000229252Member" xlink:label="C000229252Member"/>
				<link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ShareClassDomain" xlink:to="C000229252Member" order="46.0"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000229253Member" xlink:label="C000229253Member"/>
				<link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ShareClassDomain" xlink:to="C000229253Member" order="47.0"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000221008Member" xlink:label="C000221008Member"/>
				<link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ShareClassDomain" xlink:to="C000221008Member" order="48.0"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000221009Member" xlink:label="C000221009Member"/>
				<link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ShareClassDomain" xlink:to="C000221009Member" order="49.0"/>
			</link:definitionLink>
			<link:definitionLink xlink:type="extended" xlink:role="http://xbrl.sec.gov/rr/role/PerformanceMeasureOnly">
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceMeasureDomain" xlink:label="PerformanceMeasureDomain"/>
                				<link:loc xlink:type="locator" xlink:href="#wbf_SAndP500IndexMember" xlink:label="SAndP500IndexMember"/>
				<link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="PerformanceMeasureDomain" xlink:to="SAndP500IndexMember" order="2.0"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_Russell3000GrowthIndexMember" xlink:label="Russell3000GrowthIndexMember"/>
				<link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="PerformanceMeasureDomain" xlink:to="Russell3000GrowthIndexMember" order="3.0"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_Russell1000IndexMember" xlink:label="Russell1000IndexMember"/>
				<link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="PerformanceMeasureDomain" xlink:to="Russell1000IndexMember" order="4.0"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_Russell1000GrowthIndexMember" xlink:label="Russell1000GrowthIndexMember"/>
				<link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="PerformanceMeasureDomain" xlink:to="Russell1000GrowthIndexMember" order="5.0"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_RussellMidcapValueIndexMember" xlink:label="RussellMidcapValueIndexMember"/>
				<link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="PerformanceMeasureDomain" xlink:to="RussellMidcapValueIndexMember" order="6.0"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_Russell3000IndexMember" xlink:label="Russell3000IndexMember"/>
				<link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="PerformanceMeasureDomain" xlink:to="Russell3000IndexMember" order="7.0"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_S000066499Russell3000IndexMember" xlink:label="S000066499Russell3000IndexMember"/>
				<link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="PerformanceMeasureDomain" xlink:to="S000066499Russell3000IndexMember" order="8.0"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_Russell2500TMIndexMember" xlink:label="Russell2500TMIndexMember"/>
				<link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="PerformanceMeasureDomain" xlink:to="Russell2500TMIndexMember" order="9.0"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_S000008603Russell3000IndexMember" xlink:label="S000008603Russell3000IndexMember"/>
				<link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="PerformanceMeasureDomain" xlink:to="S000008603Russell3000IndexMember" order="10.0"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_Russell2500TMGrowthIndexMember" xlink:label="Russell2500TMGrowthIndexMember"/>
				<link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="PerformanceMeasureDomain" xlink:to="Russell2500TMGrowthIndexMember" order="11.0"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_S000080810Russell3000IndexMember" xlink:label="S000080810Russell3000IndexMember"/>
				<link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="PerformanceMeasureDomain" xlink:to="S000080810Russell3000IndexMember" order="12.0"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_Russell2500TMValueIndexMember" xlink:label="Russell2500TMValueIndexMember"/>
				<link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="PerformanceMeasureDomain" xlink:to="Russell2500TMValueIndexMember" order="13.0"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_S000008602Russell3000IndexMember" xlink:label="S000008602Russell3000IndexMember"/>
				<link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="PerformanceMeasureDomain" xlink:to="S000008602Russell3000IndexMember" order="14.0"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_Russell2000GrowthIndexMember" xlink:label="Russell2000GrowthIndexMember"/>
				<link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="PerformanceMeasureDomain" xlink:to="Russell2000GrowthIndexMember" order="15.0"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_S000008597Russell3000IndexMember" xlink:label="S000008597Russell3000IndexMember"/>
				<link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="PerformanceMeasureDomain" xlink:to="S000008597Russell3000IndexMember" order="16.0"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_Russell2000ValueIndexMember" xlink:label="Russell2000ValueIndexMember"/>
				<link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="PerformanceMeasureDomain" xlink:to="Russell2000ValueIndexMember" order="17.0"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_MSCIAllCountryWorldIndexNetMember" xlink:label="MSCIAllCountryWorldIndexNetMember"/>
				<link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="PerformanceMeasureDomain" xlink:to="MSCIAllCountryWorldIndexNetMember" order="18.0"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_MSCIACWIIMINetMember" xlink:label="MSCIACWIIMINetMember"/>
				<link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="PerformanceMeasureDomain" xlink:to="MSCIACWIIMINetMember" order="19.0"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_S000037763MSCIACWIExUSAIMINetMemberMember" xlink:label="S000037763MSCIACWIExUSAIMINetMemberMember"/>
				<link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="PerformanceMeasureDomain" xlink:to="S000037763MSCIACWIExUSAIMINetMemberMember" order="20.0"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_S000008604MSCIACWIExUSAIMINetMember" xlink:label="S000008604MSCIACWIExUSAIMINetMember"/>
				<link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="PerformanceMeasureDomain" xlink:to="S000008604MSCIACWIExUSAIMINetMember" order="21.0"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_S000008605MSCIACWIExUSAIMINetMember" xlink:label="S000008605MSCIACWIExUSAIMINetMember"/>
				<link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="PerformanceMeasureDomain" xlink:to="S000008605MSCIACWIExUSAIMINetMember" order="22.0"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_S000008595MSCIACWIExUSAIMINetMember" xlink:label="S000008595MSCIACWIExUSAIMINetMember"/>
				<link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="PerformanceMeasureDomain" xlink:to="S000008595MSCIACWIExUSAIMINetMember" order="23.0"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_MSCIACWIExUSASmallCapIndexNetMember" xlink:label="MSCIACWIExUSASmallCapIndexNetMember"/>
				<link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="PerformanceMeasureDomain" xlink:to="MSCIACWIExUSASmallCapIndexNetMember" order="24.0"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_MSCIEmergingMarketsIndexNetMember" xlink:label="MSCIEmergingMarketsIndexNetMember"/>
				<link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="PerformanceMeasureDomain" xlink:to="MSCIEmergingMarketsIndexNetMember" order="25.0"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_MSCIEmergingMarketsInvestableMarketIndexNetMember" xlink:label="MSCIEmergingMarketsInvestableMarketIndexNetMember"/>
				<link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="PerformanceMeasureDomain" xlink:to="MSCIEmergingMarketsInvestableMarketIndexNetMember" order="26.0"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_MSCIEmergingMarketsExChinaIMIMember" xlink:label="MSCIEmergingMarketsExChinaIMIMember"/>
				<link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="PerformanceMeasureDomain" xlink:to="MSCIEmergingMarketsExChinaIMIMember" order="27.0"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_MSCIEmergingMarketsIMIMember" xlink:label="MSCIEmergingMarketsIMIMember"/>
				<link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="PerformanceMeasureDomain" xlink:to="MSCIEmergingMarketsIMIMember" order="28.0"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_MSCIEmergingMarketsSmallCapIndexMember" xlink:label="MSCIEmergingMarketsSmallCapIndexMember"/>
				<link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="PerformanceMeasureDomain" xlink:to="MSCIEmergingMarketsSmallCapIndexMember" order="29.0"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_MSCIChinaAllSharesIndexMember" xlink:label="MSCIChinaAllSharesIndexMember"/>
				<link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="PerformanceMeasureDomain" xlink:to="MSCIChinaAllSharesIndexMember" order="30.0"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_BloombergGlobalAggregateIndexMember" xlink:label="BloombergGlobalAggregateIndexMember"/>
				<link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="PerformanceMeasureDomain" xlink:to="BloombergGlobalAggregateIndexMember" order="31.0"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_JPMorganEMBIGlobalDiversifiedMember" xlink:label="JPMorganEMBIGlobalDiversifiedMember"/>
				<link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="PerformanceMeasureDomain" xlink:to="JPMorganEMBIGlobalDiversifiedMember" order="32.0"/>
			</link:definitionLink>
			<link:definitionLink xlink:type="extended" xlink:role="http://xbrl.sec.gov/rr/role/RiskOnly">
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AllRisksMember" xlink:label="AllRisksMember"/>
								<link:loc xlink:type="locator" xlink:href="#wbf_MarketRisksMember" xlink:label="MarketRisksMember"/>
				<link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="AllRisksMember" xlink:to="MarketRisksMember" order="2.0"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_SmallerCompanyRiskMember" xlink:label="SmallerCompanyRiskMember"/>
				<link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="AllRisksMember" xlink:to="SmallerCompanyRiskMember" order="3.0"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_ShareOwnershipConcentrationRiskMember" xlink:label="ShareOwnershipConcentrationRiskMember"/>
				<link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="AllRisksMember" xlink:to="ShareOwnershipConcentrationRiskMember" order="4.0"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_StyleRiskMember" xlink:label="StyleRiskMember"/>
				<link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="AllRisksMember" xlink:to="StyleRiskMember" order="5.0"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_FocusRiskMember" xlink:label="FocusRiskMember"/>
				<link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="AllRisksMember" xlink:to="FocusRiskMember" order="6.0"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_OperationalAndTechnologyRiskMember" xlink:label="OperationalAndTechnologyRiskMember"/>
				<link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="AllRisksMember" xlink:to="OperationalAndTechnologyRiskMember" order="7.0"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_EquityFundsGeneralRiskMember" xlink:label="EquityFundsGeneralRiskMember"/>
				<link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="AllRisksMember" xlink:to="EquityFundsGeneralRiskMember" order="8.0"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_MidCapCompanyRiskMember" xlink:label="MidCapCompanyRiskMember"/>
				<link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="AllRisksMember" xlink:to="MidCapCompanyRiskMember" order="9.0"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_REITRiskMember" xlink:label="REITRiskMember"/>
				<link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="AllRisksMember" xlink:to="REITRiskMember" order="10.0"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_ForeignInvestmentRiskMember" xlink:label="ForeignInvestmentRiskMember"/>
				<link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="AllRisksMember" xlink:to="ForeignInvestmentRiskMember" order="11.0"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_SmallAndMidCapCompanyRiskMember" xlink:label="SmallAndMidCapCompanyRiskMember"/>
				<link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="AllRisksMember" xlink:to="SmallAndMidCapCompanyRiskMember" order="12.0"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_SmallAndMicroCapCompanyRiskMember" xlink:label="SmallAndMicroCapCompanyRiskMember"/>
				<link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="AllRisksMember" xlink:to="SmallAndMicroCapCompanyRiskMember" order="13.0"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_CurrencyRiskMember" xlink:label="CurrencyRiskMember"/>
				<link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="AllRisksMember" xlink:to="CurrencyRiskMember" order="14.0"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_EmergingMarketsRiskMember" xlink:label="EmergingMarketsRiskMember"/>
				<link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="AllRisksMember" xlink:to="EmergingMarketsRiskMember" order="15.0"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_GeographicRiskMember" xlink:label="GeographicRiskMember"/>
				<link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="AllRisksMember" xlink:to="GeographicRiskMember" order="16.0"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_LiquidityRiskMember" xlink:label="LiquidityRiskMember"/>
				<link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="AllRisksMember" xlink:to="LiquidityRiskMember" order="17.0"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_PortfolioTurnoverRateRiskMember" xlink:label="PortfolioTurnoverRateRiskMember"/>
				<link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="AllRisksMember" xlink:to="PortfolioTurnoverRateRiskMember" order="18.0"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_InvestingThroughStockConnectRiskMember" xlink:label="InvestingThroughStockConnectRiskMember"/>
				<link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="AllRisksMember" xlink:to="InvestingThroughStockConnectRiskMember" order="19.0"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_ChineseInvestmentRiskMember" xlink:label="ChineseInvestmentRiskMember"/>
				<link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="AllRisksMember" xlink:to="ChineseInvestmentRiskMember" order="20.0"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CreditRiskMember" xlink:label="CreditRiskMember"/>
				<link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="AllRisksMember" xlink:to="CreditRiskMember" order="21.0"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_SovereignAndQuasiSovereignDefaultRiskMember" xlink:label="SovereignAndQuasiSovereignDefaultRiskMember"/>
				<link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="AllRisksMember" xlink:to="SovereignAndQuasiSovereignDefaultRiskMember" order="22.0"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InterestRateRiskMember" xlink:label="InterestRateRiskMember"/>
				<link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="AllRisksMember" xlink:to="InterestRateRiskMember" order="23.0"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_AggressiveInvestmentTechniqueRiskMember" xlink:label="AggressiveInvestmentTechniqueRiskMember"/>
				<link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="AllRisksMember" xlink:to="AggressiveInvestmentTechniqueRiskMember" order="24.0"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_CounterpartyAndContractualDefaultRiskMember" xlink:label="CounterpartyAndContractualDefaultRiskMember"/>
				<link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="AllRisksMember" xlink:to="CounterpartyAndContractualDefaultRiskMember" order="25.0"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_CreditDefaultSwapRiskMember" xlink:label="CreditDefaultSwapRiskMember"/>
				<link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="AllRisksMember" xlink:to="CreditDefaultSwapRiskMember" order="26.0"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_DerivativesRisksMember" xlink:label="DerivativesRisksMember"/>
				<link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="AllRisksMember" xlink:to="DerivativesRisksMember" order="27.0"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_DistressedDebtRiskMember" xlink:label="DistressedDebtRiskMember"/>
				<link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="AllRisksMember" xlink:to="DistressedDebtRiskMember" order="28.0"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_FloatingAndVariableRateSecuritiesRiskMember" xlink:label="FloatingAndVariableRateSecuritiesRiskMember"/>
				<link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="AllRisksMember" xlink:to="FloatingAndVariableRateSecuritiesRiskMember" order="29.0"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_GovernmentAndRegulatoryRiskMember" xlink:label="GovernmentAndRegulatoryRiskMember"/>
				<link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="AllRisksMember" xlink:to="GovernmentAndRegulatoryRiskMember" order="30.0"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_HighYieldSecuritiesRiskMember" xlink:label="HighYieldSecuritiesRiskMember"/>
				<link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="AllRisksMember" xlink:to="HighYieldSecuritiesRiskMember" order="31.0"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_IncomeRiskMember" xlink:label="IncomeRiskMember"/>
				<link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="AllRisksMember" xlink:to="IncomeRiskMember" order="32.0"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_LeverageRiskMember" xlink:label="LeverageRiskMember"/>
				<link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="AllRisksMember" xlink:to="LeverageRiskMember" order="33.0"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_PrivatePlacementRiskMember" xlink:label="PrivatePlacementRiskMember"/>
				<link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="AllRisksMember" xlink:to="PrivatePlacementRiskMember" order="34.0"/>
			</link:definitionLink>
            <link:definitionLink xlink:type="extended" xlink:role="http://xbrl.sec.gov/rr/role/ProspectusOnly">
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentDomain" xlink:label="DocumentDomain"/>
				
			</link:definitionLink>
            <link:definitionLink xlink:type="extended" xlink:role="http://xbrl.sec.gov/oef/role/CoregistrantOnly">           
                <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AllCoregistrantsMember" xlink:label="AllCoregistrantsMember"/>
                 
            </link:definitionLink>
            <link:roleRef roleURI="http://www.xbrl.org/2009/role/negatedLabel" xlink:type="simple" xlink:href="http://www.xbrl.org/lrr/role/negated-2009-12-16.xsd#negatedLabel"/>
            <link:roleRef roleURI="http://www.xbrl.org/2009/role/negatedPeriodEndLabel" xlink:type="simple" xlink:href="http://www.xbrl.org/lrr/role/negated-2009-12-16.xsd#negatedPeriodEndLabel"/>
            <link:roleRef roleURI="http://www.xbrl.org/2009/role/negatedPeriodStartLabel" xlink:type="simple" xlink:href="http://www.xbrl.org/lrr/role/negated-2009-12-16.xsd#negatedPeriodStartLabel"/>
            <link:roleRef roleURI="http://www.xbrl.org/2009/role/negatedTotalLabel" xlink:type="simple" xlink:href="http://www.xbrl.org/lrr/role/negated-2009-12-16.xsd#negatedTotalLabel"/>
            <link:roleRef roleURI="http://www.xbrl.org/2009/role/negatedNetLabel" xlink:type="simple" xlink:href="http://www.xbrl.org/lrr/role/negated-2009-12-16.xsd#negatedNetLabel"/>
            <link:roleRef roleURI="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="simple" xlink:href="http://www.xbrl.org/lrr/role/negated-2009-12-16.xsd#negatedTerseLabel"/>
            <link:roleRef roleURI="http://www.xbrl.org/2009/role/netLabel" xlink:type="simple" xlink:href="http://www.xbrl.org/lrr/role/net-2009-12-16.xsd#netLabel"/>
            <link:labelLink xlink:type="extended" xlink:role="http://www.xbrl.org/2003/role/link">
				<link:loc xlink:type="locator" xlink:href="#wbf_S000008594Member" xlink:label="S000008594Member"/>
				<link:label xlink:type="resource" xlink:label="label_S000008594Member" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xml:lang="en-US">William Blair Growth Fund</link:label>
				<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="S000008594Member" xlink:to="label_S000008594Member"/>
				<link:label xlink:type="resource" xlink:label="label_S000008594Member_2" xlink:role="http://www.xbrl.org/2003/role/label" xml:lang="en-US">S000008594 [Member]</link:label>
				<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="S000008594Member" xlink:to="label_S000008594Member_2"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_SAndP500IndexMember" xlink:label="SAndP500IndexMember"/>
				<link:label xlink:type="resource" xlink:label="label_SAndP500IndexMember" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xml:lang="en-US">S&amp;P 500&amp;#174; Index (reflects no deduction for fees, expenses or taxes)</link:label>
				<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="SAndP500IndexMember" xlink:to="label_SAndP500IndexMember"/>
				<link:label xlink:type="resource" xlink:label="label_SAndP500IndexMember_2" xlink:role="http://www.xbrl.org/2003/role/label" xml:lang="en-US">S And P 500 Index [Member]</link:label>
				<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="SAndP500IndexMember" xlink:to="label_SAndP500IndexMember_2"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_Russell3000GrowthIndexMember" xlink:label="Russell3000GrowthIndexMember"/>
				<link:label xlink:type="resource" xlink:label="label_Russell3000GrowthIndexMember" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xml:lang="en-US">Russell 3000&amp;#174; Growth Index (reflects no deduction for fees, expenses or taxes)</link:label>
				<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="Russell3000GrowthIndexMember" xlink:to="label_Russell3000GrowthIndexMember"/>
				<link:label xlink:type="resource" xlink:label="label_Russell3000GrowthIndexMember_2" xlink:role="http://www.xbrl.org/2003/role/label" xml:lang="en-US">Russell 3000 Growth Index [Member]</link:label>
				<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="Russell3000GrowthIndexMember" xlink:to="label_Russell3000GrowthIndexMember_2"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000023523Member" xlink:label="C000023523Member"/>
				<link:label xlink:type="resource" xlink:label="label_C000023523Member" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xml:lang="en-US">Class N</link:label>
				<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="C000023523Member" xlink:to="label_C000023523Member"/>
				<link:label xlink:type="resource" xlink:label="label_C000023523Member_2" xlink:role="http://www.xbrl.org/2003/role/label" xml:lang="en-US">C000023523 [Member]</link:label>
				<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="C000023523Member" xlink:to="label_C000023523Member_2"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000023524Member" xlink:label="C000023524Member"/>
				<link:label xlink:type="resource" xlink:label="label_C000023524Member" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xml:lang="en-US">Class I</link:label>
				<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="C000023524Member" xlink:to="label_C000023524Member"/>
				<link:label xlink:type="resource" xlink:label="label_C000023524Member_2" xlink:role="http://www.xbrl.org/2003/role/label" xml:lang="en-US">C000023524 [Member]</link:label>
				<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="C000023524Member" xlink:to="label_C000023524Member_2"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000211716Member" xlink:label="C000211716Member"/>
				<link:label xlink:type="resource" xlink:label="label_C000211716Member" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xml:lang="en-US">Class R6</link:label>
				<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="C000211716Member" xlink:to="label_C000211716Member"/>
				<link:label xlink:type="resource" xlink:label="label_C000211716Member_2" xlink:role="http://www.xbrl.org/2003/role/label" xml:lang="en-US">C000211716 [Member]</link:label>
				<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="C000211716Member" xlink:to="label_C000211716Member_2"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_MarketRisksMember" xlink:label="MarketRisksMember"/>
				<link:label xlink:type="resource" xlink:label="label_MarketRisksMember" xlink:role="http://www.xbrl.org/2003/role/label" xml:lang="en-US">Market Risks [Member]</link:label>
				<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="MarketRisksMember" xlink:to="label_MarketRisksMember"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_SmallerCompanyRiskMember" xlink:label="SmallerCompanyRiskMember"/>
				<link:label xlink:type="resource" xlink:label="label_SmallerCompanyRiskMember" xlink:role="http://www.xbrl.org/2003/role/label" xml:lang="en-US">Smaller Company Risk [Member]</link:label>
				<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="SmallerCompanyRiskMember" xlink:to="label_SmallerCompanyRiskMember"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_ShareOwnershipConcentrationRiskMember" xlink:label="ShareOwnershipConcentrationRiskMember"/>
				<link:label xlink:type="resource" xlink:label="label_ShareOwnershipConcentrationRiskMember" xlink:role="http://www.xbrl.org/2003/role/label" xml:lang="en-US">Share Ownership Concentration Risk [Member]</link:label>
				<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ShareOwnershipConcentrationRiskMember" xlink:to="label_ShareOwnershipConcentrationRiskMember"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_StyleRiskMember" xlink:label="StyleRiskMember"/>
				<link:label xlink:type="resource" xlink:label="label_StyleRiskMember" xlink:role="http://www.xbrl.org/2003/role/label" xml:lang="en-US">Style Risk [Member]</link:label>
				<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="StyleRiskMember" xlink:to="label_StyleRiskMember"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_FocusRiskMember" xlink:label="FocusRiskMember"/>
				<link:label xlink:type="resource" xlink:label="label_FocusRiskMember" xlink:role="http://www.xbrl.org/2003/role/label" xml:lang="en-US">Focus Risk [Member]</link:label>
				<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="FocusRiskMember" xlink:to="label_FocusRiskMember"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_OperationalAndTechnologyRiskMember" xlink:label="OperationalAndTechnologyRiskMember"/>
				<link:label xlink:type="resource" xlink:label="label_OperationalAndTechnologyRiskMember" xlink:role="http://www.xbrl.org/2003/role/label" xml:lang="en-US">Operational and Technology Risk [Member]</link:label>
				<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="OperationalAndTechnologyRiskMember" xlink:to="label_OperationalAndTechnologyRiskMember"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_EquityFundsGeneralRiskMember" xlink:label="EquityFundsGeneralRiskMember"/>
				<link:label xlink:type="resource" xlink:label="label_EquityFundsGeneralRiskMember" xlink:role="http://www.xbrl.org/2003/role/label" xml:lang="en-US">Equity Funds General Risk [Member]</link:label>
				<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="EquityFundsGeneralRiskMember" xlink:to="label_EquityFundsGeneralRiskMember"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_S000008601Member" xlink:label="S000008601Member"/>
				<link:label xlink:type="resource" xlink:label="label_S000008601Member" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xml:lang="en-US">William Blair Large Cap Growth Fund</link:label>
				<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="S000008601Member" xlink:to="label_S000008601Member"/>
				<link:label xlink:type="resource" xlink:label="label_S000008601Member_2" xlink:role="http://www.xbrl.org/2003/role/label" xml:lang="en-US">S000008601 [Member]</link:label>
				<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="S000008601Member" xlink:to="label_S000008601Member_2"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_Russell1000IndexMember" xlink:label="Russell1000IndexMember"/>
				<link:label xlink:type="resource" xlink:label="label_Russell1000IndexMember" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xml:lang="en-US">Russell 1000&amp;#174; Index (reflects no deduction for fees, expenses or taxes)</link:label>
				<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="Russell1000IndexMember" xlink:to="label_Russell1000IndexMember"/>
				<link:label xlink:type="resource" xlink:label="label_Russell1000IndexMember_2" xlink:role="http://www.xbrl.org/2003/role/label" xml:lang="en-US">Russell 1000 Index [Member]</link:label>
				<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="Russell1000IndexMember" xlink:to="label_Russell1000IndexMember_2"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_Russell1000GrowthIndexMember" xlink:label="Russell1000GrowthIndexMember"/>
				<link:label xlink:type="resource" xlink:label="label_Russell1000GrowthIndexMember" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xml:lang="en-US">Russell 1000&amp;#174; Growth Index (reflects no deduction for fees, expenses or taxes)</link:label>
				<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="Russell1000GrowthIndexMember" xlink:to="label_Russell1000GrowthIndexMember"/>
				<link:label xlink:type="resource" xlink:label="label_Russell1000GrowthIndexMember_2" xlink:role="http://www.xbrl.org/2003/role/label" xml:lang="en-US">Russell 1000 Growth Index [Member]</link:label>
				<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="Russell1000GrowthIndexMember" xlink:to="label_Russell1000GrowthIndexMember_2"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000023538Member" xlink:label="C000023538Member"/>
				<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="C000023538Member" xlink:to="label_C000023523Member"/>
				<link:label xlink:type="resource" xlink:label="label_C000023538Member_2" xlink:role="http://www.xbrl.org/2003/role/label" xml:lang="en-US">C000023538 [Member]</link:label>
				<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="C000023538Member" xlink:to="label_C000023538Member_2"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000023539Member" xlink:label="C000023539Member"/>
				<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="C000023539Member" xlink:to="label_C000023524Member"/>
				<link:label xlink:type="resource" xlink:label="label_C000023539Member_2" xlink:role="http://www.xbrl.org/2003/role/label" xml:lang="en-US">C000023539 [Member]</link:label>
				<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="C000023539Member" xlink:to="label_C000023539Member_2"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000211719Member" xlink:label="C000211719Member"/>
				<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="C000211719Member" xlink:to="label_C000211716Member"/>
				<link:label xlink:type="resource" xlink:label="label_C000211719Member_2" xlink:role="http://www.xbrl.org/2003/role/label" xml:lang="en-US">C000211719 [Member]</link:label>
				<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="C000211719Member" xlink:to="label_C000211719Member_2"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_S000075391Member" xlink:label="S000075391Member"/>
				<link:label xlink:type="resource" xlink:label="label_S000075391Member" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xml:lang="en-US">William Blair Mid Cap Value Fund</link:label>
				<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="S000075391Member" xlink:to="label_S000075391Member"/>
				<link:label xlink:type="resource" xlink:label="label_S000075391Member_2" xlink:role="http://www.xbrl.org/2003/role/label" xml:lang="en-US">S000075391 [Member]</link:label>
				<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="S000075391Member" xlink:to="label_S000075391Member_2"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_RussellMidcapValueIndexMember" xlink:label="RussellMidcapValueIndexMember"/>
				<link:label xlink:type="resource" xlink:label="label_RussellMidcapValueIndexMember" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xml:lang="en-US">Russell Midcap&amp;#174; Value Index (reflects no deduction for fees, expenses or taxes)</link:label>
				<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="RussellMidcapValueIndexMember" xlink:to="label_RussellMidcapValueIndexMember"/>
				<link:label xlink:type="resource" xlink:label="label_RussellMidcapValueIndexMember_2" xlink:role="http://www.xbrl.org/2003/role/label" xml:lang="en-US">Russell Midcap Value Index [Member]</link:label>
				<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="RussellMidcapValueIndexMember" xlink:to="label_RussellMidcapValueIndexMember_2"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_Russell3000IndexMember" xlink:label="Russell3000IndexMember"/>
				<link:label xlink:type="resource" xlink:label="label_Russell3000IndexMember" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xml:lang="en-US">Russell 3000&amp;#174; Index (reflects no deduction for fees, expenses or taxes)</link:label>
				<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="Russell3000IndexMember" xlink:to="label_Russell3000IndexMember"/>
				<link:label xlink:type="resource" xlink:label="label_Russell3000IndexMember_2" xlink:role="http://www.xbrl.org/2003/role/label" xml:lang="en-US">Russell 3000 Index [Member]</link:label>
				<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="Russell3000IndexMember" xlink:to="label_Russell3000IndexMember_2"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000234386Member" xlink:label="C000234386Member"/>
				<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="C000234386Member" xlink:to="label_C000023524Member"/>
				<link:label xlink:type="resource" xlink:label="label_C000234386Member_2" xlink:role="http://www.xbrl.org/2003/role/label" xml:lang="en-US">C000234386 [Member]</link:label>
				<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="C000234386Member" xlink:to="label_C000234386Member_2"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000234387Member" xlink:label="C000234387Member"/>
				<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="C000234387Member" xlink:to="label_C000211716Member"/>
				<link:label xlink:type="resource" xlink:label="label_C000234387Member_2" xlink:role="http://www.xbrl.org/2003/role/label" xml:lang="en-US">C000234387 [Member]</link:label>
				<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="C000234387Member" xlink:to="label_C000234387Member_2"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_MidCapCompanyRiskMember" xlink:label="MidCapCompanyRiskMember"/>
				<link:label xlink:type="resource" xlink:label="label_MidCapCompanyRiskMember" xlink:role="http://www.xbrl.org/2003/role/label" xml:lang="en-US">Mid Cap Company Risk [Member]</link:label>
				<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="MidCapCompanyRiskMember" xlink:to="label_MidCapCompanyRiskMember"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_REITRiskMember" xlink:label="REITRiskMember"/>
				<link:label xlink:type="resource" xlink:label="label_REITRiskMember" xlink:role="http://www.xbrl.org/2003/role/label" xml:lang="en-US">REIT Risk [Member]</link:label>
				<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="REITRiskMember" xlink:to="label_REITRiskMember"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_ForeignInvestmentRiskMember" xlink:label="ForeignInvestmentRiskMember"/>
				<link:label xlink:type="resource" xlink:label="label_ForeignInvestmentRiskMember" xlink:role="http://www.xbrl.org/2003/role/label" xml:lang="en-US">Foreign Investment Risk [Member]</link:label>
				<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ForeignInvestmentRiskMember" xlink:to="label_ForeignInvestmentRiskMember"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_S000066499Member" xlink:label="S000066499Member"/>
				<link:label xlink:type="resource" xlink:label="label_S000066499Member" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xml:lang="en-US">William Blair Small-Mid Cap Core Fund</link:label>
				<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="S000066499Member" xlink:to="label_S000066499Member"/>
				<link:label xlink:type="resource" xlink:label="label_S000066499Member_2" xlink:role="http://www.xbrl.org/2003/role/label" xml:lang="en-US">S000066499 [Member]</link:label>
				<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="S000066499Member" xlink:to="label_S000066499Member_2"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_S000066499Russell3000IndexMember" xlink:label="S000066499Russell3000IndexMember"/>
				<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="S000066499Russell3000IndexMember" xlink:to="label_Russell3000IndexMember"/>
				<link:label xlink:type="resource" xlink:label="label_S000066499Russell3000IndexMember_2" xlink:role="http://www.xbrl.org/2003/role/label" xml:lang="en-US">S000066499 Russell 3000 Index [Member]</link:label>
				<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="S000066499Russell3000IndexMember" xlink:to="label_S000066499Russell3000IndexMember_2"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_Russell2500TMIndexMember" xlink:label="Russell2500TMIndexMember"/>
				<link:label xlink:type="resource" xlink:label="label_Russell2500TMIndexMember" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xml:lang="en-US">Russell 2500&amp;trade; Index (reflects no deduction for fees, expenses or taxes)</link:label>
				<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="Russell2500TMIndexMember" xlink:to="label_Russell2500TMIndexMember"/>
				<link:label xlink:type="resource" xlink:label="label_Russell2500TMIndexMember_2" xlink:role="http://www.xbrl.org/2003/role/label" xml:lang="en-US">Russell 2500TM Index [Member]</link:label>
				<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="Russell2500TMIndexMember" xlink:to="label_Russell2500TMIndexMember_2"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000214491Member" xlink:label="C000214491Member"/>
				<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="C000214491Member" xlink:to="label_C000023524Member"/>
				<link:label xlink:type="resource" xlink:label="label_C000214491Member_2" xlink:role="http://www.xbrl.org/2003/role/label" xml:lang="en-US">C000214491 [Member]</link:label>
				<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="C000214491Member" xlink:to="label_C000214491Member_2"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000214492Member" xlink:label="C000214492Member"/>
				<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="C000214492Member" xlink:to="label_C000211716Member"/>
				<link:label xlink:type="resource" xlink:label="label_C000214492Member_2" xlink:role="http://www.xbrl.org/2003/role/label" xml:lang="en-US">C000214492 [Member]</link:label>
				<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="C000214492Member" xlink:to="label_C000214492Member_2"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_SmallAndMidCapCompanyRiskMember" xlink:label="SmallAndMidCapCompanyRiskMember"/>
				<link:label xlink:type="resource" xlink:label="label_SmallAndMidCapCompanyRiskMember" xlink:role="http://www.xbrl.org/2003/role/label" xml:lang="en-US">Small and Mid Cap Company Risk [Member]</link:label>
				<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="SmallAndMidCapCompanyRiskMember" xlink:to="label_SmallAndMidCapCompanyRiskMember"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_S000008603Member" xlink:label="S000008603Member"/>
				<link:label xlink:type="resource" xlink:label="label_S000008603Member" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xml:lang="en-US">William Blair Small-Mid Cap Growth Fund</link:label>
				<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="S000008603Member" xlink:to="label_S000008603Member"/>
				<link:label xlink:type="resource" xlink:label="label_S000008603Member_2" xlink:role="http://www.xbrl.org/2003/role/label" xml:lang="en-US">S000008603 [Member]</link:label>
				<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="S000008603Member" xlink:to="label_S000008603Member_2"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_S000008603Russell3000IndexMember" xlink:label="S000008603Russell3000IndexMember"/>
				<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="S000008603Russell3000IndexMember" xlink:to="label_Russell3000IndexMember"/>
				<link:label xlink:type="resource" xlink:label="label_S000008603Russell3000IndexMember_2" xlink:role="http://www.xbrl.org/2003/role/label" xml:lang="en-US">S000008603 Russell 3000 Index [Member]</link:label>
				<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="S000008603Russell3000IndexMember" xlink:to="label_S000008603Russell3000IndexMember_2"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_Russell2500TMGrowthIndexMember" xlink:label="Russell2500TMGrowthIndexMember"/>
				<link:label xlink:type="resource" xlink:label="label_Russell2500TMGrowthIndexMember" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xml:lang="en-US">Russell 2500&amp;trade; Growth Index (reflects no deduction for fees, expenses or taxes)</link:label>
				<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="Russell2500TMGrowthIndexMember" xlink:to="label_Russell2500TMGrowthIndexMember"/>
				<link:label xlink:type="resource" xlink:label="label_Russell2500TMGrowthIndexMember_2" xlink:role="http://www.xbrl.org/2003/role/label" xml:lang="en-US">Russell 2500TM Growth Index [Member]</link:label>
				<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="Russell2500TMGrowthIndexMember" xlink:to="label_Russell2500TMGrowthIndexMember_2"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000023542Member" xlink:label="C000023542Member"/>
				<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="C000023542Member" xlink:to="label_C000023523Member"/>
				<link:label xlink:type="resource" xlink:label="label_C000023542Member_2" xlink:role="http://www.xbrl.org/2003/role/label" xml:lang="en-US">C000023542 [Member]</link:label>
				<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="C000023542Member" xlink:to="label_C000023542Member_2"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000023543Member" xlink:label="C000023543Member"/>
				<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="C000023543Member" xlink:to="label_C000023524Member"/>
				<link:label xlink:type="resource" xlink:label="label_C000023543Member_2" xlink:role="http://www.xbrl.org/2003/role/label" xml:lang="en-US">C000023543 [Member]</link:label>
				<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="C000023543Member" xlink:to="label_C000023543Member_2"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000211721Member" xlink:label="C000211721Member"/>
				<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="C000211721Member" xlink:to="label_C000211716Member"/>
				<link:label xlink:type="resource" xlink:label="label_C000211721Member_2" xlink:role="http://www.xbrl.org/2003/role/label" xml:lang="en-US">C000211721 [Member]</link:label>
				<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="C000211721Member" xlink:to="label_C000211721Member_2"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_S000080810Member" xlink:label="S000080810Member"/>
				<link:label xlink:type="resource" xlink:label="label_S000080810Member" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xml:lang="en-US">William Blair Small-Mid Cap Value Fund</link:label>
				<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="S000080810Member" xlink:to="label_S000080810Member"/>
				<link:label xlink:type="resource" xlink:label="label_S000080810Member_2" xlink:role="http://www.xbrl.org/2003/role/label" xml:lang="en-US">S000080810 [Member]</link:label>
				<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="S000080810Member" xlink:to="label_S000080810Member_2"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_S000080810Russell3000IndexMember" xlink:label="S000080810Russell3000IndexMember"/>
				<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="S000080810Russell3000IndexMember" xlink:to="label_Russell3000IndexMember"/>
				<link:label xlink:type="resource" xlink:label="label_S000080810Russell3000IndexMember_2" xlink:role="http://www.xbrl.org/2003/role/label" xml:lang="en-US">S000080810 Russell 3000 Index [Member]</link:label>
				<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="S000080810Russell3000IndexMember" xlink:to="label_S000080810Russell3000IndexMember_2"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_Russell2500TMValueIndexMember" xlink:label="Russell2500TMValueIndexMember"/>
				<link:label xlink:type="resource" xlink:label="label_Russell2500TMValueIndexMember" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xml:lang="en-US">Russell 2500&amp;trade; Value Index (reflects no deduction for fees, expenses or taxes)</link:label>
				<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="Russell2500TMValueIndexMember" xlink:to="label_Russell2500TMValueIndexMember"/>
				<link:label xlink:type="resource" xlink:label="label_Russell2500TMValueIndexMember_2" xlink:role="http://www.xbrl.org/2003/role/label" xml:lang="en-US">Russell 2500TM Value Index [Member]</link:label>
				<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="Russell2500TMValueIndexMember" xlink:to="label_Russell2500TMValueIndexMember_2"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000243363Member" xlink:label="C000243363Member"/>
				<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="C000243363Member" xlink:to="label_C000023524Member"/>
				<link:label xlink:type="resource" xlink:label="label_C000243363Member_2" xlink:role="http://www.xbrl.org/2003/role/label" xml:lang="en-US">C000243363 [Member]</link:label>
				<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="C000243363Member" xlink:to="label_C000243363Member_2"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000243364Member" xlink:label="C000243364Member"/>
				<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="C000243364Member" xlink:to="label_C000211716Member"/>
				<link:label xlink:type="resource" xlink:label="label_C000243364Member_2" xlink:role="http://www.xbrl.org/2003/role/label" xml:lang="en-US">C000243364 [Member]</link:label>
				<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="C000243364Member" xlink:to="label_C000243364Member_2"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_S000008602Member" xlink:label="S000008602Member"/>
				<link:label xlink:type="resource" xlink:label="label_S000008602Member" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xml:lang="en-US">William Blair Small Cap Growth Fund</link:label>
				<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="S000008602Member" xlink:to="label_S000008602Member"/>
				<link:label xlink:type="resource" xlink:label="label_S000008602Member_2" xlink:role="http://www.xbrl.org/2003/role/label" xml:lang="en-US">S000008602 [Member]</link:label>
				<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="S000008602Member" xlink:to="label_S000008602Member_2"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_S000008602Russell3000IndexMember" xlink:label="S000008602Russell3000IndexMember"/>
				<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="S000008602Russell3000IndexMember" xlink:to="label_Russell3000IndexMember"/>
				<link:label xlink:type="resource" xlink:label="label_S000008602Russell3000IndexMember_2" xlink:role="http://www.xbrl.org/2003/role/label" xml:lang="en-US">S000008602 Russell 3000 Index</link:label>
				<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="S000008602Russell3000IndexMember" xlink:to="label_S000008602Russell3000IndexMember_2"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_Russell2000GrowthIndexMember" xlink:label="Russell2000GrowthIndexMember"/>
				<link:label xlink:type="resource" xlink:label="label_Russell2000GrowthIndexMember" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xml:lang="en-US">Russell 2000&amp;#174; Growth Index (reflects no deduction for fees, expenses or taxes)</link:label>
				<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="Russell2000GrowthIndexMember" xlink:to="label_Russell2000GrowthIndexMember"/>
				<link:label xlink:type="resource" xlink:label="label_Russell2000GrowthIndexMember_2" xlink:role="http://www.xbrl.org/2003/role/label" xml:lang="en-US">Russell 2000 Growth Index [Member]</link:label>
				<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="Russell2000GrowthIndexMember" xlink:to="label_Russell2000GrowthIndexMember_2"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000023540Member" xlink:label="C000023540Member"/>
				<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="C000023540Member" xlink:to="label_C000023523Member"/>
				<link:label xlink:type="resource" xlink:label="label_C000023540Member_2" xlink:role="http://www.xbrl.org/2003/role/label" xml:lang="en-US">C000023540 [Member]</link:label>
				<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="C000023540Member" xlink:to="label_C000023540Member_2"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000023541Member" xlink:label="C000023541Member"/>
				<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="C000023541Member" xlink:to="label_C000023524Member"/>
				<link:label xlink:type="resource" xlink:label="label_C000023541Member_2" xlink:role="http://www.xbrl.org/2003/role/label" xml:lang="en-US">C000023541 [Member]</link:label>
				<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="C000023541Member" xlink:to="label_C000023541Member_2"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000211720Member" xlink:label="C000211720Member"/>
				<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="C000211720Member" xlink:to="label_C000211716Member"/>
				<link:label xlink:type="resource" xlink:label="label_C000211720Member_2" xlink:role="http://www.xbrl.org/2003/role/label" xml:lang="en-US">C000211720 [Member]</link:label>
				<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="C000211720Member" xlink:to="label_C000211720Member_2"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_SmallAndMicroCapCompanyRiskMember" xlink:label="SmallAndMicroCapCompanyRiskMember"/>
				<link:label xlink:type="resource" xlink:label="label_SmallAndMicroCapCompanyRiskMember" xlink:role="http://www.xbrl.org/2003/role/label" xml:lang="en-US">Small and Micro Cap Company Risk [Member]</link:label>
				<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="SmallAndMicroCapCompanyRiskMember" xlink:to="label_SmallAndMicroCapCompanyRiskMember"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_S000008597Member" xlink:label="S000008597Member"/>
				<link:label xlink:type="resource" xlink:label="label_S000008597Member" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xml:lang="en-US">William Blair Small Cap Value Fund</link:label>
				<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="S000008597Member" xlink:to="label_S000008597Member"/>
				<link:label xlink:type="resource" xlink:label="label_S000008597Member_2" xlink:role="http://www.xbrl.org/2003/role/label" xml:lang="en-US">S000008597 [Member]</link:label>
				<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="S000008597Member" xlink:to="label_S000008597Member_2"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_S000008597Russell3000IndexMember" xlink:label="S000008597Russell3000IndexMember"/>
				<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="S000008597Russell3000IndexMember" xlink:to="label_Russell3000IndexMember"/>
				<link:label xlink:type="resource" xlink:label="label_S000008597Russell3000IndexMember_2" xlink:role="http://www.xbrl.org/2003/role/label" xml:lang="en-US">S000008597 Russell 3000 Index</link:label>
				<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="S000008597Russell3000IndexMember" xlink:to="label_S000008597Russell3000IndexMember_2"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_Russell2000ValueIndexMember" xlink:label="Russell2000ValueIndexMember"/>
				<link:label xlink:type="resource" xlink:label="label_Russell2000ValueIndexMember" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xml:lang="en-US">Russell 2000&amp;#174; Value Index (reflects no deduction for fees, expenses or taxes)</link:label>
				<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="Russell2000ValueIndexMember" xlink:to="label_Russell2000ValueIndexMember"/>
				<link:label xlink:type="resource" xlink:label="label_Russell2000ValueIndexMember_2" xlink:role="http://www.xbrl.org/2003/role/label" xml:lang="en-US">Russell 2000 Value Index [Member]</link:label>
				<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="Russell2000ValueIndexMember" xlink:to="label_Russell2000ValueIndexMember_2"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000023531Member" xlink:label="C000023531Member"/>
				<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="C000023531Member" xlink:to="label_C000023523Member"/>
				<link:label xlink:type="resource" xlink:label="label_C000023531Member_2" xlink:role="http://www.xbrl.org/2003/role/label" xml:lang="en-US">C000023531 [Member]</link:label>
				<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="C000023531Member" xlink:to="label_C000023531Member_2"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000023532Member" xlink:label="C000023532Member"/>
				<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="C000023532Member" xlink:to="label_C000023524Member"/>
				<link:label xlink:type="resource" xlink:label="label_C000023532Member_2" xlink:role="http://www.xbrl.org/2003/role/label" xml:lang="en-US">C000023532 [Member]</link:label>
				<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="C000023532Member" xlink:to="label_C000023532Member_2"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000211717Member" xlink:label="C000211717Member"/>
				<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="C000211717Member" xlink:to="label_C000211716Member"/>
				<link:label xlink:type="resource" xlink:label="label_C000211717Member_2" xlink:role="http://www.xbrl.org/2003/role/label" xml:lang="en-US">C000211717 [Member]</link:label>
				<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="C000211717Member" xlink:to="label_C000211717Member_2"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_S000019315Member" xlink:label="S000019315Member"/>
				<link:label xlink:type="resource" xlink:label="label_S000019315Member" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xml:lang="en-US">William Blair Global Leaders Fund</link:label>
				<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="S000019315Member" xlink:to="label_S000019315Member"/>
				<link:label xlink:type="resource" xlink:label="label_S000019315Member_2" xlink:role="http://www.xbrl.org/2003/role/label" xml:lang="en-US">S000019315 [Member]</link:label>
				<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="S000019315Member" xlink:to="label_S000019315Member_2"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_MSCIAllCountryWorldIndexNetMember" xlink:label="MSCIAllCountryWorldIndexNetMember"/>
				<link:label xlink:type="resource" xlink:label="label_MSCIAllCountryWorldIndexNetMember" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xml:lang="en-US">MSCI All Country World Index (net) (reflects no deductions for fees, expenses or taxes)</link:label>
				<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="MSCIAllCountryWorldIndexNetMember" xlink:to="label_MSCIAllCountryWorldIndexNetMember"/>
				<link:label xlink:type="resource" xlink:label="label_MSCIAllCountryWorldIndexNetMember_2" xlink:role="http://www.xbrl.org/2003/role/label" xml:lang="en-US">MSCI All Country World Index net [Member]</link:label>
				<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="MSCIAllCountryWorldIndexNetMember" xlink:to="label_MSCIAllCountryWorldIndexNetMember_2"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_MSCIACWIIMINetMember" xlink:label="MSCIACWIIMINetMember"/>
				<link:label xlink:type="resource" xlink:label="label_MSCIACWIIMINetMember" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xml:lang="en-US">MSCI ACWI IMI (net) (reflects no deduction for fees, expenses or taxes)</link:label>
				<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="MSCIACWIIMINetMember" xlink:to="label_MSCIACWIIMINetMember"/>
				<link:label xlink:type="resource" xlink:label="label_MSCIACWIIMINetMember_2" xlink:role="http://www.xbrl.org/2003/role/label" xml:lang="en-US">MSCI ACWI IMI net [Member]</link:label>
				<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="MSCIACWIIMINetMember" xlink:to="label_MSCIACWIIMINetMember_2"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000053607Member" xlink:label="C000053607Member"/>
				<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="C000053607Member" xlink:to="label_C000023523Member"/>
				<link:label xlink:type="resource" xlink:label="label_C000053607Member_2" xlink:role="http://www.xbrl.org/2003/role/label" xml:lang="en-US">C000053607 [Member]</link:label>
				<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="C000053607Member" xlink:to="label_C000053607Member_2"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000053608Member" xlink:label="C000053608Member"/>
				<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="C000053608Member" xlink:to="label_C000023524Member"/>
				<link:label xlink:type="resource" xlink:label="label_C000053608Member_2" xlink:role="http://www.xbrl.org/2003/role/label" xml:lang="en-US">C000053608 [Member]</link:label>
				<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="C000053608Member" xlink:to="label_C000053608Member_2"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000053609Member" xlink:label="C000053609Member"/>
				<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="C000053609Member" xlink:to="label_C000211716Member"/>
				<link:label xlink:type="resource" xlink:label="label_C000053609Member_2" xlink:role="http://www.xbrl.org/2003/role/label" xml:lang="en-US">C000053609 [Member]</link:label>
				<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="C000053609Member" xlink:to="label_C000053609Member_2"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_CurrencyRiskMember" xlink:label="CurrencyRiskMember"/>
				<link:label xlink:type="resource" xlink:label="label_CurrencyRiskMember" xlink:role="http://www.xbrl.org/2003/role/label" xml:lang="en-US">Currency Risk [Member]</link:label>
				<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="CurrencyRiskMember" xlink:to="label_CurrencyRiskMember"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_EmergingMarketsRiskMember" xlink:label="EmergingMarketsRiskMember"/>
				<link:label xlink:type="resource" xlink:label="label_EmergingMarketsRiskMember" xlink:role="http://www.xbrl.org/2003/role/label" xml:lang="en-US">Emerging Markets Risk [Member]</link:label>
				<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="EmergingMarketsRiskMember" xlink:to="label_EmergingMarketsRiskMember"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_GeographicRiskMember" xlink:label="GeographicRiskMember"/>
				<link:label xlink:type="resource" xlink:label="label_GeographicRiskMember" xlink:role="http://www.xbrl.org/2003/role/label" xml:lang="en-US">Geographic Risk [Member]</link:label>
				<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="GeographicRiskMember" xlink:to="label_GeographicRiskMember"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_S000037763Member" xlink:label="S000037763Member"/>
				<link:label xlink:type="resource" xlink:label="label_S000037763Member" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xml:lang="en-US">William Blair International Leaders Fund</link:label>
				<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="S000037763Member" xlink:to="label_S000037763Member"/>
				<link:label xlink:type="resource" xlink:label="label_S000037763Member_2" xlink:role="http://www.xbrl.org/2003/role/label" xml:lang="en-US">S000037763 [Member]</link:label>
				<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="S000037763Member" xlink:to="label_S000037763Member_2"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_S000037763MSCIACWIExUSAIMINetMemberMember" xlink:label="S000037763MSCIACWIExUSAIMINetMemberMember"/>
				<link:label xlink:type="resource" xlink:label="label_S000037763MSCIACWIExUSAIMINetMemberMember" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xml:lang="en-US">MSCI ACWI ex USA IMI (net) (reflects no deduction for fees, expenses or taxes)</link:label>
				<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="S000037763MSCIACWIExUSAIMINetMemberMember" xlink:to="label_S000037763MSCIACWIExUSAIMINetMemberMember"/>
				<link:label xlink:type="resource" xlink:label="label_S000037763MSCIACWIExUSAIMINetMemberMember_2" xlink:role="http://www.xbrl.org/2003/role/label" xml:lang="en-US">S000037763 MSCI ACWI ex USA IMI net [Member]</link:label>
				<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="S000037763MSCIACWIExUSAIMINetMemberMember" xlink:to="label_S000037763MSCIACWIExUSAIMINetMemberMember_2"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000116468Member" xlink:label="C000116468Member"/>
				<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="C000116468Member" xlink:to="label_C000023523Member"/>
				<link:label xlink:type="resource" xlink:label="label_C000116468Member_2" xlink:role="http://www.xbrl.org/2003/role/label" xml:lang="en-US">C000116468 [Member]</link:label>
				<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="C000116468Member" xlink:to="label_C000116468Member_2"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000116469Member" xlink:label="C000116469Member"/>
				<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="C000116469Member" xlink:to="label_C000023524Member"/>
				<link:label xlink:type="resource" xlink:label="label_C000116469Member_2" xlink:role="http://www.xbrl.org/2003/role/label" xml:lang="en-US">C000116469 [Member]</link:label>
				<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="C000116469Member" xlink:to="label_C000116469Member_2"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000116470Member" xlink:label="C000116470Member"/>
				<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="C000116470Member" xlink:to="label_C000211716Member"/>
				<link:label xlink:type="resource" xlink:label="label_C000116470Member_2" xlink:role="http://www.xbrl.org/2003/role/label" xml:lang="en-US">C000116470 [Member]</link:label>
				<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="C000116470Member" xlink:to="label_C000116470Member_2"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_S000008604Member" xlink:label="S000008604Member"/>
				<link:label xlink:type="resource" xlink:label="label_S000008604Member" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xml:lang="en-US">William Blair International Growth Fund</link:label>
				<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="S000008604Member" xlink:to="label_S000008604Member"/>
				<link:label xlink:type="resource" xlink:label="label_S000008604Member_2" xlink:role="http://www.xbrl.org/2003/role/label" xml:lang="en-US">S000008604 [Member]</link:label>
				<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="S000008604Member" xlink:to="label_S000008604Member_2"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_S000008604MSCIACWIExUSAIMINetMember" xlink:label="S000008604MSCIACWIExUSAIMINetMember"/>
				<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="S000008604MSCIACWIExUSAIMINetMember" xlink:to="label_S000037763MSCIACWIExUSAIMINetMemberMember"/>
				<link:label xlink:type="resource" xlink:label="label_S000008604MSCIACWIExUSAIMINetMember_2" xlink:role="http://www.xbrl.org/2003/role/label" xml:lang="en-US">S000008604 MSCI ACWI ex USA IMI net [Member]</link:label>
				<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="S000008604MSCIACWIExUSAIMINetMember" xlink:to="label_S000008604MSCIACWIExUSAIMINetMember_2"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000023544Member" xlink:label="C000023544Member"/>
				<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="C000023544Member" xlink:to="label_C000023523Member"/>
				<link:label xlink:type="resource" xlink:label="label_C000023544Member_2" xlink:role="http://www.xbrl.org/2003/role/label" xml:lang="en-US">C000023544 [Member]</link:label>
				<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="C000023544Member" xlink:to="label_C000023544Member_2"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000023545Member" xlink:label="C000023545Member"/>
				<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="C000023545Member" xlink:to="label_C000023524Member"/>
				<link:label xlink:type="resource" xlink:label="label_C000023545Member_2" xlink:role="http://www.xbrl.org/2003/role/label" xml:lang="en-US">C000023545 [Member]</link:label>
				<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="C000023545Member" xlink:to="label_C000023545Member_2"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000211722Member" xlink:label="C000211722Member"/>
				<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="C000211722Member" xlink:to="label_C000211716Member"/>
				<link:label xlink:type="resource" xlink:label="label_C000211722Member_2" xlink:role="http://www.xbrl.org/2003/role/label" xml:lang="en-US">C000211722 [Member]</link:label>
				<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="C000211722Member" xlink:to="label_C000211722Member_2"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_S000008605Member" xlink:label="S000008605Member"/>
				<link:label xlink:type="resource" xlink:label="label_S000008605Member" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xml:lang="en-US">William Blair Institutional International Growth Fund</link:label>
				<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="S000008605Member" xlink:to="label_S000008605Member"/>
				<link:label xlink:type="resource" xlink:label="label_S000008605Member_2" xlink:role="http://www.xbrl.org/2003/role/label" xml:lang="en-US">S000008605 [Member]</link:label>
				<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="S000008605Member" xlink:to="label_S000008605Member_2"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_S000008605MSCIACWIExUSAIMINetMember" xlink:label="S000008605MSCIACWIExUSAIMINetMember"/>
				<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="S000008605MSCIACWIExUSAIMINetMember" xlink:to="label_S000037763MSCIACWIExUSAIMINetMemberMember"/>
				<link:label xlink:type="resource" xlink:label="label_S000008605MSCIACWIExUSAIMINetMember_2" xlink:role="http://www.xbrl.org/2003/role/label" xml:lang="en-US">S000008605 MSCI ACWI ex USA IMI net [Member]</link:label>
				<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="S000008605MSCIACWIExUSAIMINetMember" xlink:to="label_S000008605MSCIACWIExUSAIMINetMember_2"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000023546Member" xlink:label="C000023546Member"/>
				<link:label xlink:type="resource" xlink:label="label_C000023546Member" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xml:lang="en-US">Institutional Class</link:label>
				<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="C000023546Member" xlink:to="label_C000023546Member"/>
				<link:label xlink:type="resource" xlink:label="label_C000023546Member_2" xlink:role="http://www.xbrl.org/2003/role/label" xml:lang="en-US">C000023546 [Member]</link:label>
				<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="C000023546Member" xlink:to="label_C000023546Member_2"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_S000008595Member" xlink:label="S000008595Member"/>
				<link:label xlink:type="resource" xlink:label="label_S000008595Member" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xml:lang="en-US">William Blair International Small Cap Growth Fund</link:label>
				<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="S000008595Member" xlink:to="label_S000008595Member"/>
				<link:label xlink:type="resource" xlink:label="label_S000008595Member_2" xlink:role="http://www.xbrl.org/2003/role/label" xml:lang="en-US">S000008595 [Member]</link:label>
				<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="S000008595Member" xlink:to="label_S000008595Member_2"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_S000008595MSCIACWIExUSAIMINetMember" xlink:label="S000008595MSCIACWIExUSAIMINetMember"/>
				<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="S000008595MSCIACWIExUSAIMINetMember" xlink:to="label_S000037763MSCIACWIExUSAIMINetMemberMember"/>
				<link:label xlink:type="resource" xlink:label="label_S000008595MSCIACWIExUSAIMINetMember_2" xlink:role="http://www.xbrl.org/2003/role/label" xml:lang="en-US">S000008595 MSCI ACWI ex USA IMI net [Member]</link:label>
				<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="S000008595MSCIACWIExUSAIMINetMember" xlink:to="label_S000008595MSCIACWIExUSAIMINetMember_2"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_MSCIACWIExUSASmallCapIndexNetMember" xlink:label="MSCIACWIExUSASmallCapIndexNetMember"/>
				<link:label xlink:type="resource" xlink:label="label_MSCIACWIExUSASmallCapIndexNetMember" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xml:lang="en-US">MSCI ACWI ex USA Small Cap Index (net) (reflects no deduction for fees, expenses or taxes)</link:label>
				<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="MSCIACWIExUSASmallCapIndexNetMember" xlink:to="label_MSCIACWIExUSASmallCapIndexNetMember"/>
				<link:label xlink:type="resource" xlink:label="label_MSCIACWIExUSASmallCapIndexNetMember_2" xlink:role="http://www.xbrl.org/2003/role/label" xml:lang="en-US">MSCI ACWI ex USA Small Cap Index net [Member]</link:label>
				<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="MSCIACWIExUSASmallCapIndexNetMember" xlink:to="label_MSCIACWIExUSASmallCapIndexNetMember_2"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000023525Member" xlink:label="C000023525Member"/>
				<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="C000023525Member" xlink:to="label_C000023523Member"/>
				<link:label xlink:type="resource" xlink:label="label_C000023525Member_2" xlink:role="http://www.xbrl.org/2003/role/label" xml:lang="en-US">C000023525 [Member]</link:label>
				<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="C000023525Member" xlink:to="label_C000023525Member_2"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000023526Member" xlink:label="C000023526Member"/>
				<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="C000023526Member" xlink:to="label_C000023524Member"/>
				<link:label xlink:type="resource" xlink:label="label_C000023526Member_2" xlink:role="http://www.xbrl.org/2003/role/label" xml:lang="en-US">C000023526 [Member]</link:label>
				<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="C000023526Member" xlink:to="label_C000023526Member_2"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000023527Member" xlink:label="C000023527Member"/>
				<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="C000023527Member" xlink:to="label_C000211716Member"/>
				<link:label xlink:type="resource" xlink:label="label_C000023527Member_2" xlink:role="http://www.xbrl.org/2003/role/label" xml:lang="en-US">C000023527 [Member]</link:label>
				<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="C000023527Member" xlink:to="label_C000023527Member_2"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_LiquidityRiskMember" xlink:label="LiquidityRiskMember"/>
				<link:label xlink:type="resource" xlink:label="label_LiquidityRiskMember" xlink:role="http://www.xbrl.org/2003/role/label" xml:lang="en-US">Liquidity Risk [Member]</link:label>
				<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="LiquidityRiskMember" xlink:to="label_LiquidityRiskMember"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_S000021052Member" xlink:label="S000021052Member"/>
				<link:label xlink:type="resource" xlink:label="label_S000021052Member" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xml:lang="en-US">William Blair Emerging Markets Leaders Fund</link:label>
				<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="S000021052Member" xlink:to="label_S000021052Member"/>
				<link:label xlink:type="resource" xlink:label="label_S000021052Member_2" xlink:role="http://www.xbrl.org/2003/role/label" xml:lang="en-US">S000021052 [Member]</link:label>
				<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="S000021052Member" xlink:to="label_S000021052Member_2"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_MSCIEmergingMarketsIndexNetMember" xlink:label="MSCIEmergingMarketsIndexNetMember"/>
				<link:label xlink:type="resource" xlink:label="label_MSCIEmergingMarketsIndexNetMember" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xml:lang="en-US">MSCI Emerging Markets Index (net) (reflects no deduction for fees, expenses or taxes)</link:label>
				<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="MSCIEmergingMarketsIndexNetMember" xlink:to="label_MSCIEmergingMarketsIndexNetMember"/>
				<link:label xlink:type="resource" xlink:label="label_MSCIEmergingMarketsIndexNetMember_2" xlink:role="http://www.xbrl.org/2003/role/label" xml:lang="en-US">MSCI Emerging Markets Index net [Member]</link:label>
				<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="MSCIEmergingMarketsIndexNetMember" xlink:to="label_MSCIEmergingMarketsIndexNetMember_2"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000059867Member" xlink:label="C000059867Member"/>
				<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="C000059867Member" xlink:to="label_C000023524Member"/>
				<link:label xlink:type="resource" xlink:label="label_C000059867Member_2" xlink:role="http://www.xbrl.org/2003/role/label" xml:lang="en-US">C000059867 [Member]</link:label>
				<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="C000059867Member" xlink:to="label_C000059867Member_2"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000059868Member" xlink:label="C000059868Member"/>
				<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="C000059868Member" xlink:to="label_C000211716Member"/>
				<link:label xlink:type="resource" xlink:label="label_C000059868Member_2" xlink:role="http://www.xbrl.org/2003/role/label" xml:lang="en-US">C000059868 [Member]</link:label>
				<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="C000059868Member" xlink:to="label_C000059868Member_2"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000088850Member" xlink:label="C000088850Member"/>
				<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="C000088850Member" xlink:to="label_C000023523Member"/>
				<link:label xlink:type="resource" xlink:label="label_C000088850Member_2" xlink:role="http://www.xbrl.org/2003/role/label" xml:lang="en-US">C000088850 [Member]</link:label>
				<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="C000088850Member" xlink:to="label_C000088850Member_2"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_S000008596Member" xlink:label="S000008596Member"/>
				<link:label xlink:type="resource" xlink:label="label_S000008596Member" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xml:lang="en-US">William Blair Emerging Markets Growth Fund</link:label>
				<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="S000008596Member" xlink:to="label_S000008596Member"/>
				<link:label xlink:type="resource" xlink:label="label_S000008596Member_2" xlink:role="http://www.xbrl.org/2003/role/label" xml:lang="en-US">S000008596 [Member]</link:label>
				<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="S000008596Member" xlink:to="label_S000008596Member_2"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_MSCIEmergingMarketsInvestableMarketIndexNetMember" xlink:label="MSCIEmergingMarketsInvestableMarketIndexNetMember"/>
				<link:label xlink:type="resource" xlink:label="label_MSCIEmergingMarketsInvestableMarketIndexNetMember" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xml:lang="en-US">MSCI Emerging Markets Investable Market Index (net) (reflects no deduction for fees, expenses or taxes)</link:label>
				<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="MSCIEmergingMarketsInvestableMarketIndexNetMember" xlink:to="label_MSCIEmergingMarketsInvestableMarketIndexNetMember"/>
				<link:label xlink:type="resource" xlink:label="label_MSCIEmergingMarketsInvestableMarketIndexNetMember_2" xlink:role="http://www.xbrl.org/2003/role/label" xml:lang="en-US">MSCI Emerging Markets Investable Market Index net [Member]</link:label>
				<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="MSCIEmergingMarketsInvestableMarketIndexNetMember" xlink:to="label_MSCIEmergingMarketsInvestableMarketIndexNetMember_2"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000023528Member" xlink:label="C000023528Member"/>
				<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="C000023528Member" xlink:to="label_C000023523Member"/>
				<link:label xlink:type="resource" xlink:label="label_C000023528Member_2" xlink:role="http://www.xbrl.org/2003/role/label" xml:lang="en-US">C000023528 [Member]</link:label>
				<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="C000023528Member" xlink:to="label_C000023528Member_2"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000023529Member" xlink:label="C000023529Member"/>
				<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="C000023529Member" xlink:to="label_C000023524Member"/>
				<link:label xlink:type="resource" xlink:label="label_C000023529Member_2" xlink:role="http://www.xbrl.org/2003/role/label" xml:lang="en-US">C000023529 [Member]</link:label>
				<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="C000023529Member" xlink:to="label_C000023529Member_2"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000023530Member" xlink:label="C000023530Member"/>
				<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="C000023530Member" xlink:to="label_C000211716Member"/>
				<link:label xlink:type="resource" xlink:label="label_C000023530Member_2" xlink:role="http://www.xbrl.org/2003/role/label" xml:lang="en-US">C000023530 [Member]</link:label>
				<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="C000023530Member" xlink:to="label_C000023530Member_2"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_S000075390Member" xlink:label="S000075390Member"/>
				<link:label xlink:type="resource" xlink:label="label_S000075390Member" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xml:lang="en-US">William Blair Emerging Markets ex China Growth Fund</link:label>
				<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="S000075390Member" xlink:to="label_S000075390Member"/>
				<link:label xlink:type="resource" xlink:label="label_S000075390Member_2" xlink:role="http://www.xbrl.org/2003/role/label" xml:lang="en-US">S000075390 [Member]</link:label>
				<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="S000075390Member" xlink:to="label_S000075390Member_2"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_MSCIEmergingMarketsExChinaIMIMember" xlink:label="MSCIEmergingMarketsExChinaIMIMember"/>
				<link:label xlink:type="resource" xlink:label="label_MSCIEmergingMarketsExChinaIMIMember" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xml:lang="en-US">MSCI Emerging Markets ex-China IMI (reflects no deduction for fees, expenses or taxes)</link:label>
				<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="MSCIEmergingMarketsExChinaIMIMember" xlink:to="label_MSCIEmergingMarketsExChinaIMIMember"/>
				<link:label xlink:type="resource" xlink:label="label_MSCIEmergingMarketsExChinaIMIMember_2" xlink:role="http://www.xbrl.org/2003/role/label" xml:lang="en-US">MSCI Emerging Markets ex China IMI [Member]</link:label>
				<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="MSCIEmergingMarketsExChinaIMIMember" xlink:to="label_MSCIEmergingMarketsExChinaIMIMember_2"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000234384Member" xlink:label="C000234384Member"/>
				<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="C000234384Member" xlink:to="label_C000023524Member"/>
				<link:label xlink:type="resource" xlink:label="label_C000234384Member_2" xlink:role="http://www.xbrl.org/2003/role/label" xml:lang="en-US">C000234384 [Member]</link:label>
				<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="C000234384Member" xlink:to="label_C000234384Member_2"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000234385Member" xlink:label="C000234385Member"/>
				<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="C000234385Member" xlink:to="label_C000211716Member"/>
				<link:label xlink:type="resource" xlink:label="label_C000234385Member_2" xlink:role="http://www.xbrl.org/2003/role/label" xml:lang="en-US">C000234385 [Member]</link:label>
				<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="C000234385Member" xlink:to="label_C000234385Member_2"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_S000034349Member" xlink:label="S000034349Member"/>
				<link:label xlink:type="resource" xlink:label="label_S000034349Member" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xml:lang="en-US">William Blair Emerging Markets Small Cap Growth Fund</link:label>
				<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="S000034349Member" xlink:to="label_S000034349Member"/>
				<link:label xlink:type="resource" xlink:label="label_S000034349Member_2" xlink:role="http://www.xbrl.org/2003/role/label" xml:lang="en-US">S000034349 [Member]</link:label>
				<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="S000034349Member" xlink:to="label_S000034349Member_2"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_MSCIEmergingMarketsIMIMember" xlink:label="MSCIEmergingMarketsIMIMember"/>
				<link:label xlink:type="resource" xlink:label="label_MSCIEmergingMarketsIMIMember" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xml:lang="en-US">MSCI Emerging Markets IMI (net) (reflects no deduction for fees, expenses or taxes)</link:label>
				<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="MSCIEmergingMarketsIMIMember" xlink:to="label_MSCIEmergingMarketsIMIMember"/>
				<link:label xlink:type="resource" xlink:label="label_MSCIEmergingMarketsIMIMember_2" xlink:role="http://www.xbrl.org/2003/role/label" xml:lang="en-US">MSCI Emerging Markets IMI [Member]</link:label>
				<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="MSCIEmergingMarketsIMIMember" xlink:to="label_MSCIEmergingMarketsIMIMember_2"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_MSCIEmergingMarketsSmallCapIndexMember" xlink:label="MSCIEmergingMarketsSmallCapIndexMember"/>
				<link:label xlink:type="resource" xlink:label="label_MSCIEmergingMarketsSmallCapIndexMember" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xml:lang="en-US">MSCI Emerging Markets Small Cap Index (net) (reflects no deduction for fees, expenses or taxes)</link:label>
				<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="MSCIEmergingMarketsSmallCapIndexMember" xlink:to="label_MSCIEmergingMarketsSmallCapIndexMember"/>
				<link:label xlink:type="resource" xlink:label="label_MSCIEmergingMarketsSmallCapIndexMember_2" xlink:role="http://www.xbrl.org/2003/role/label" xml:lang="en-US">MSCI Emerging Markets Small Cap Index [Member]</link:label>
				<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="MSCIEmergingMarketsSmallCapIndexMember" xlink:to="label_MSCIEmergingMarketsSmallCapIndexMember_2"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000105753Member" xlink:label="C000105753Member"/>
				<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="C000105753Member" xlink:to="label_C000023524Member"/>
				<link:label xlink:type="resource" xlink:label="label_C000105753Member_2" xlink:role="http://www.xbrl.org/2003/role/label" xml:lang="en-US">C000105753 [Member]</link:label>
				<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="C000105753Member" xlink:to="label_C000105753Member_2"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000105754Member" xlink:label="C000105754Member"/>
				<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="C000105754Member" xlink:to="label_C000023523Member"/>
				<link:label xlink:type="resource" xlink:label="label_C000105754Member_2" xlink:role="http://www.xbrl.org/2003/role/label" xml:lang="en-US">C000105754 [Member]</link:label>
				<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="C000105754Member" xlink:to="label_C000105754Member_2"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000105755Member" xlink:label="C000105755Member"/>
				<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="C000105755Member" xlink:to="label_C000211716Member"/>
				<link:label xlink:type="resource" xlink:label="label_C000105755Member_2" xlink:role="http://www.xbrl.org/2003/role/label" xml:lang="en-US">C000105755 [Member]</link:label>
				<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="C000105755Member" xlink:to="label_C000105755Member_2"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_PortfolioTurnoverRateRiskMember" xlink:label="PortfolioTurnoverRateRiskMember"/>
				<link:label xlink:type="resource" xlink:label="label_PortfolioTurnoverRateRiskMember" xlink:role="http://www.xbrl.org/2003/role/label" xml:lang="en-US">Portfolio Turnover Rate Risk [Member]</link:label>
				<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="PortfolioTurnoverRateRiskMember" xlink:to="label_PortfolioTurnoverRateRiskMember"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_S000072753Member" xlink:label="S000072753Member"/>
				<link:label xlink:type="resource" xlink:label="label_S000072753Member" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xml:lang="en-US">William Blair China Growth Fund</link:label>
				<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="S000072753Member" xlink:to="label_S000072753Member"/>
				<link:label xlink:type="resource" xlink:label="label_S000072753Member_2" xlink:role="http://www.xbrl.org/2003/role/label" xml:lang="en-US">S000072753 [Member]</link:label>
				<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="S000072753Member" xlink:to="label_S000072753Member_2"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_MSCIChinaAllSharesIndexMember" xlink:label="MSCIChinaAllSharesIndexMember"/>
				<link:label xlink:type="resource" xlink:label="label_MSCIChinaAllSharesIndexMember" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xml:lang="en-US">MSCI China All Shares Index (reflects no deduction for fees, expenses or taxes)</link:label>
				<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="MSCIChinaAllSharesIndexMember" xlink:to="label_MSCIChinaAllSharesIndexMember"/>
				<link:label xlink:type="resource" xlink:label="label_MSCIChinaAllSharesIndexMember_2" xlink:role="http://www.xbrl.org/2003/role/label" xml:lang="en-US">MSCI China All Shares Index [Member]</link:label>
				<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="MSCIChinaAllSharesIndexMember" xlink:to="label_MSCIChinaAllSharesIndexMember_2"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000229252Member" xlink:label="C000229252Member"/>
				<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="C000229252Member" xlink:to="label_C000023524Member"/>
				<link:label xlink:type="resource" xlink:label="label_C000229252Member_2" xlink:role="http://www.xbrl.org/2003/role/label" xml:lang="en-US">C000229252 [Member]</link:label>
				<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="C000229252Member" xlink:to="label_C000229252Member_2"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000229253Member" xlink:label="C000229253Member"/>
				<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="C000229253Member" xlink:to="label_C000211716Member"/>
				<link:label xlink:type="resource" xlink:label="label_C000229253Member_2" xlink:role="http://www.xbrl.org/2003/role/label" xml:lang="en-US">C000229253 [Member]</link:label>
				<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="C000229253Member" xlink:to="label_C000229253Member_2"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_InvestingThroughStockConnectRiskMember" xlink:label="InvestingThroughStockConnectRiskMember"/>
				<link:label xlink:type="resource" xlink:label="label_InvestingThroughStockConnectRiskMember" xlink:role="http://www.xbrl.org/2003/role/label" xml:lang="en-US">Investing Through Stock Connect Risk [Member]</link:label>
				<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="InvestingThroughStockConnectRiskMember" xlink:to="label_InvestingThroughStockConnectRiskMember"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_ChineseInvestmentRiskMember" xlink:label="ChineseInvestmentRiskMember"/>
				<link:label xlink:type="resource" xlink:label="label_ChineseInvestmentRiskMember" xlink:role="http://www.xbrl.org/2003/role/label" xml:lang="en-US">Chinese Investment Risk [Member]</link:label>
				<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ChineseInvestmentRiskMember" xlink:to="label_ChineseInvestmentRiskMember"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_S000069167Member" xlink:label="S000069167Member"/>
				<link:label xlink:type="resource" xlink:label="label_S000069167Member" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xml:lang="en-US">William Blair Emerging Markets Debt Fund</link:label>
				<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="S000069167Member" xlink:to="label_S000069167Member"/>
				<link:label xlink:type="resource" xlink:label="label_S000069167Member_2" xlink:role="http://www.xbrl.org/2003/role/label" xml:lang="en-US">S000069167 [Member]</link:label>
				<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="S000069167Member" xlink:to="label_S000069167Member_2"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_BloombergGlobalAggregateIndexMember" xlink:label="BloombergGlobalAggregateIndexMember"/>
				<link:label xlink:type="resource" xlink:label="label_BloombergGlobalAggregateIndexMember" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xml:lang="en-US">Bloomberg Global Aggregate Index (reflects no deduction for fees, expenses or taxes)</link:label>
				<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="BloombergGlobalAggregateIndexMember" xlink:to="label_BloombergGlobalAggregateIndexMember"/>
				<link:label xlink:type="resource" xlink:label="label_BloombergGlobalAggregateIndexMember_2" xlink:role="http://www.xbrl.org/2003/role/label" xml:lang="en-US">Bloomberg Global Aggregate Index [Member]</link:label>
				<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="BloombergGlobalAggregateIndexMember" xlink:to="label_BloombergGlobalAggregateIndexMember_2"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_JPMorganEMBIGlobalDiversifiedMember" xlink:label="JPMorganEMBIGlobalDiversifiedMember"/>
				<link:label xlink:type="resource" xlink:label="label_JPMorganEMBIGlobalDiversifiedMember" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xml:lang="en-US">JPMorgan EMBI Global Diversified (reflects no deduction for fees, expenses or taxes)</link:label>
				<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="JPMorganEMBIGlobalDiversifiedMember" xlink:to="label_JPMorganEMBIGlobalDiversifiedMember"/>
				<link:label xlink:type="resource" xlink:label="label_JPMorganEMBIGlobalDiversifiedMember_2" xlink:role="http://www.xbrl.org/2003/role/label" xml:lang="en-US">JPMorgan EMBI Global Diversified [Member]</link:label>
				<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="JPMorganEMBIGlobalDiversifiedMember" xlink:to="label_JPMorganEMBIGlobalDiversifiedMember_2"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000221008Member" xlink:label="C000221008Member"/>
				<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="C000221008Member" xlink:to="label_C000211716Member"/>
				<link:label xlink:type="resource" xlink:label="label_C000221008Member_2" xlink:role="http://www.xbrl.org/2003/role/label" xml:lang="en-US">C000221008 [Member]</link:label>
				<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="C000221008Member" xlink:to="label_C000221008Member_2"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_C000221009Member" xlink:label="C000221009Member"/>
				<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="C000221009Member" xlink:to="label_C000023524Member"/>
				<link:label xlink:type="resource" xlink:label="label_C000221009Member_2" xlink:role="http://www.xbrl.org/2003/role/label" xml:lang="en-US">C000221009 [Member]</link:label>
				<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="C000221009Member" xlink:to="label_C000221009Member_2"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CreditRiskMember" xlink:label="CreditRiskMember"/>
				<link:label xlink:type="resource" xlink:label="label_CreditRiskMember" xlink:role="http://www.xbrl.org/2003/role/label" xml:lang="en-US">Credit Risk [Member]</link:label>
				<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="CreditRiskMember" xlink:to="label_CreditRiskMember"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_SovereignAndQuasiSovereignDefaultRiskMember" xlink:label="SovereignAndQuasiSovereignDefaultRiskMember"/>
				<link:label xlink:type="resource" xlink:label="label_SovereignAndQuasiSovereignDefaultRiskMember" xlink:role="http://www.xbrl.org/2003/role/label" xml:lang="en-US">Sovereign and Quasi Sovereign Default Risk [Member]</link:label>
				<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="SovereignAndQuasiSovereignDefaultRiskMember" xlink:to="label_SovereignAndQuasiSovereignDefaultRiskMember"/>
				<link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InterestRateRiskMember" xlink:label="InterestRateRiskMember"/>
				<link:label xlink:type="resource" xlink:label="label_InterestRateRiskMember" xlink:role="http://www.xbrl.org/2003/role/label" xml:lang="en-US">Interest Rate Risk [Member]</link:label>
				<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="InterestRateRiskMember" xlink:to="label_InterestRateRiskMember"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_AggressiveInvestmentTechniqueRiskMember" xlink:label="AggressiveInvestmentTechniqueRiskMember"/>
				<link:label xlink:type="resource" xlink:label="label_AggressiveInvestmentTechniqueRiskMember" xlink:role="http://www.xbrl.org/2003/role/label" xml:lang="en-US">Aggressive Investment Technique Risk [Member]</link:label>
				<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="AggressiveInvestmentTechniqueRiskMember" xlink:to="label_AggressiveInvestmentTechniqueRiskMember"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_CounterpartyAndContractualDefaultRiskMember" xlink:label="CounterpartyAndContractualDefaultRiskMember"/>
				<link:label xlink:type="resource" xlink:label="label_CounterpartyAndContractualDefaultRiskMember" xlink:role="http://www.xbrl.org/2003/role/label" xml:lang="en-US">Counterparty and Contractual Default Risk [Member]</link:label>
				<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="CounterpartyAndContractualDefaultRiskMember" xlink:to="label_CounterpartyAndContractualDefaultRiskMember"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_CreditDefaultSwapRiskMember" xlink:label="CreditDefaultSwapRiskMember"/>
				<link:label xlink:type="resource" xlink:label="label_CreditDefaultSwapRiskMember" xlink:role="http://www.xbrl.org/2003/role/label" xml:lang="en-US">Credit Default Swap Risk [Member]</link:label>
				<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="CreditDefaultSwapRiskMember" xlink:to="label_CreditDefaultSwapRiskMember"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_DerivativesRisksMember" xlink:label="DerivativesRisksMember"/>
				<link:label xlink:type="resource" xlink:label="label_DerivativesRisksMember" xlink:role="http://www.xbrl.org/2003/role/label" xml:lang="en-US">Derivatives Risks [Member]</link:label>
				<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="DerivativesRisksMember" xlink:to="label_DerivativesRisksMember"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_DistressedDebtRiskMember" xlink:label="DistressedDebtRiskMember"/>
				<link:label xlink:type="resource" xlink:label="label_DistressedDebtRiskMember" xlink:role="http://www.xbrl.org/2003/role/label" xml:lang="en-US">Distressed Debt Risk [Member]</link:label>
				<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="DistressedDebtRiskMember" xlink:to="label_DistressedDebtRiskMember"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_FloatingAndVariableRateSecuritiesRiskMember" xlink:label="FloatingAndVariableRateSecuritiesRiskMember"/>
				<link:label xlink:type="resource" xlink:label="label_FloatingAndVariableRateSecuritiesRiskMember" xlink:role="http://www.xbrl.org/2003/role/label" xml:lang="en-US">Floating and Variable Rate Securities Risk [Member]</link:label>
				<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="FloatingAndVariableRateSecuritiesRiskMember" xlink:to="label_FloatingAndVariableRateSecuritiesRiskMember"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_GovernmentAndRegulatoryRiskMember" xlink:label="GovernmentAndRegulatoryRiskMember"/>
				<link:label xlink:type="resource" xlink:label="label_GovernmentAndRegulatoryRiskMember" xlink:role="http://www.xbrl.org/2003/role/label" xml:lang="en-US">Government and Regulatory Risk [Member]</link:label>
				<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="GovernmentAndRegulatoryRiskMember" xlink:to="label_GovernmentAndRegulatoryRiskMember"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_HighYieldSecuritiesRiskMember" xlink:label="HighYieldSecuritiesRiskMember"/>
				<link:label xlink:type="resource" xlink:label="label_HighYieldSecuritiesRiskMember" xlink:role="http://www.xbrl.org/2003/role/label" xml:lang="en-US">High Yield Securities Risk [Member]</link:label>
				<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="HighYieldSecuritiesRiskMember" xlink:to="label_HighYieldSecuritiesRiskMember"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_IncomeRiskMember" xlink:label="IncomeRiskMember"/>
				<link:label xlink:type="resource" xlink:label="label_IncomeRiskMember" xlink:role="http://www.xbrl.org/2003/role/label" xml:lang="en-US">Income Risk [Member]</link:label>
				<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="IncomeRiskMember" xlink:to="label_IncomeRiskMember"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_LeverageRiskMember" xlink:label="LeverageRiskMember"/>
				<link:label xlink:type="resource" xlink:label="label_LeverageRiskMember" xlink:role="http://www.xbrl.org/2003/role/label" xml:lang="en-US">Leverage Risk [Member]</link:label>
				<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="LeverageRiskMember" xlink:to="label_LeverageRiskMember"/>
				<link:loc xlink:type="locator" xlink:href="#wbf_PrivatePlacementRiskMember" xlink:label="PrivatePlacementRiskMember"/>
				<link:label xlink:type="resource" xlink:label="label_PrivatePlacementRiskMember" xlink:role="http://www.xbrl.org/2003/role/label" xml:lang="en-US">Private Placement Risk [Member]</link:label>
				<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="PrivatePlacementRiskMember" xlink:to="label_PrivatePlacementRiskMember"/>

            </link:labelLink>
         </link:linkbase>
      </xs:appinfo>
  </xs:annotation>
	<xs:element name="S000008594Member" id="wbf_S000008594Member" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration"/>
	<xs:element name="SAndP500IndexMember" id="wbf_SAndP500IndexMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration"/>
	<xs:element name="Russell3000GrowthIndexMember" id="wbf_Russell3000GrowthIndexMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration"/>
	<xs:element name="C000023523Member" id="wbf_C000023523Member" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration"/>
	<xs:element name="C000023524Member" id="wbf_C000023524Member" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration"/>
	<xs:element name="C000211716Member" id="wbf_C000211716Member" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration"/>
	<xs:element name="MarketRisksMember" id="wbf_MarketRisksMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration"/>
	<xs:element name="SmallerCompanyRiskMember" id="wbf_SmallerCompanyRiskMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration"/>
	<xs:element name="ShareOwnershipConcentrationRiskMember" id="wbf_ShareOwnershipConcentrationRiskMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration"/>
	<xs:element name="StyleRiskMember" id="wbf_StyleRiskMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration"/>
	<xs:element name="FocusRiskMember" id="wbf_FocusRiskMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration"/>
	<xs:element name="OperationalAndTechnologyRiskMember" id="wbf_OperationalAndTechnologyRiskMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration"/>
	<xs:element name="EquityFundsGeneralRiskMember" id="wbf_EquityFundsGeneralRiskMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration"/>
	<xs:element name="S000008601Member" id="wbf_S000008601Member" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration"/>
	<xs:element name="Russell1000IndexMember" id="wbf_Russell1000IndexMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration"/>
	<xs:element name="Russell1000GrowthIndexMember" id="wbf_Russell1000GrowthIndexMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration"/>
	<xs:element name="C000023538Member" id="wbf_C000023538Member" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration"/>
	<xs:element name="C000023539Member" id="wbf_C000023539Member" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration"/>
	<xs:element name="C000211719Member" id="wbf_C000211719Member" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration"/>
	<xs:element name="S000075391Member" id="wbf_S000075391Member" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration"/>
	<xs:element name="RussellMidcapValueIndexMember" id="wbf_RussellMidcapValueIndexMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration"/>
	<xs:element name="Russell3000IndexMember" id="wbf_Russell3000IndexMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration"/>
	<xs:element name="C000234386Member" id="wbf_C000234386Member" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration"/>
	<xs:element name="C000234387Member" id="wbf_C000234387Member" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration"/>
	<xs:element name="MidCapCompanyRiskMember" id="wbf_MidCapCompanyRiskMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration"/>
	<xs:element name="REITRiskMember" id="wbf_REITRiskMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration"/>
	<xs:element name="ForeignInvestmentRiskMember" id="wbf_ForeignInvestmentRiskMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration"/>
	<xs:element name="S000066499Member" id="wbf_S000066499Member" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration"/>
	<xs:element name="S000066499Russell3000IndexMember" id="wbf_S000066499Russell3000IndexMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration"/>
	<xs:element name="Russell2500TMIndexMember" id="wbf_Russell2500TMIndexMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration"/>
	<xs:element name="C000214491Member" id="wbf_C000214491Member" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration"/>
	<xs:element name="C000214492Member" id="wbf_C000214492Member" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration"/>
	<xs:element name="SmallAndMidCapCompanyRiskMember" id="wbf_SmallAndMidCapCompanyRiskMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration"/>
	<xs:element name="S000008603Member" id="wbf_S000008603Member" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration"/>
	<xs:element name="S000008603Russell3000IndexMember" id="wbf_S000008603Russell3000IndexMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration"/>
	<xs:element name="Russell2500TMGrowthIndexMember" id="wbf_Russell2500TMGrowthIndexMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration"/>
	<xs:element name="C000023542Member" id="wbf_C000023542Member" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration"/>
	<xs:element name="C000023543Member" id="wbf_C000023543Member" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration"/>
	<xs:element name="C000211721Member" id="wbf_C000211721Member" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration"/>
	<xs:element name="S000080810Member" id="wbf_S000080810Member" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration"/>
	<xs:element name="S000080810Russell3000IndexMember" id="wbf_S000080810Russell3000IndexMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration"/>
	<xs:element name="Russell2500TMValueIndexMember" id="wbf_Russell2500TMValueIndexMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration"/>
	<xs:element name="C000243363Member" id="wbf_C000243363Member" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration"/>
	<xs:element name="C000243364Member" id="wbf_C000243364Member" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration"/>
	<xs:element name="S000008602Member" id="wbf_S000008602Member" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration"/>
	<xs:element name="S000008602Russell3000IndexMember" id="wbf_S000008602Russell3000IndexMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration"/>
	<xs:element name="Russell2000GrowthIndexMember" id="wbf_Russell2000GrowthIndexMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration"/>
	<xs:element name="C000023540Member" id="wbf_C000023540Member" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration"/>
	<xs:element name="C000023541Member" id="wbf_C000023541Member" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration"/>
	<xs:element name="C000211720Member" id="wbf_C000211720Member" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration"/>
	<xs:element name="SmallAndMicroCapCompanyRiskMember" id="wbf_SmallAndMicroCapCompanyRiskMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration"/>
	<xs:element name="S000008597Member" id="wbf_S000008597Member" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration"/>
	<xs:element name="S000008597Russell3000IndexMember" id="wbf_S000008597Russell3000IndexMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration"/>
	<xs:element name="Russell2000ValueIndexMember" id="wbf_Russell2000ValueIndexMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration"/>
	<xs:element name="C000023531Member" id="wbf_C000023531Member" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration"/>
	<xs:element name="C000023532Member" id="wbf_C000023532Member" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration"/>
	<xs:element name="C000211717Member" id="wbf_C000211717Member" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration"/>
	<xs:element name="S000019315Member" id="wbf_S000019315Member" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration"/>
	<xs:element name="MSCIAllCountryWorldIndexNetMember" id="wbf_MSCIAllCountryWorldIndexNetMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration"/>
	<xs:element name="MSCIACWIIMINetMember" id="wbf_MSCIACWIIMINetMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration"/>
	<xs:element name="C000053607Member" id="wbf_C000053607Member" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration"/>
	<xs:element name="C000053608Member" id="wbf_C000053608Member" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration"/>
	<xs:element name="C000053609Member" id="wbf_C000053609Member" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration"/>
	<xs:element name="CurrencyRiskMember" id="wbf_CurrencyRiskMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration"/>
	<xs:element name="EmergingMarketsRiskMember" id="wbf_EmergingMarketsRiskMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration"/>
	<xs:element name="GeographicRiskMember" id="wbf_GeographicRiskMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration"/>
	<xs:element name="S000037763Member" id="wbf_S000037763Member" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration"/>
	<xs:element name="S000037763MSCIACWIExUSAIMINetMemberMember" id="wbf_S000037763MSCIACWIExUSAIMINetMemberMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration"/>
	<xs:element name="C000116468Member" id="wbf_C000116468Member" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration"/>
	<xs:element name="C000116469Member" id="wbf_C000116469Member" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration"/>
	<xs:element name="C000116470Member" id="wbf_C000116470Member" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration"/>
	<xs:element name="S000008604Member" id="wbf_S000008604Member" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration"/>
	<xs:element name="S000008604MSCIACWIExUSAIMINetMember" id="wbf_S000008604MSCIACWIExUSAIMINetMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration"/>
	<xs:element name="C000023544Member" id="wbf_C000023544Member" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration"/>
	<xs:element name="C000023545Member" id="wbf_C000023545Member" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration"/>
	<xs:element name="C000211722Member" id="wbf_C000211722Member" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration"/>
	<xs:element name="S000008605Member" id="wbf_S000008605Member" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration"/>
	<xs:element name="S000008605MSCIACWIExUSAIMINetMember" id="wbf_S000008605MSCIACWIExUSAIMINetMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration"/>
	<xs:element name="C000023546Member" id="wbf_C000023546Member" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration"/>
	<xs:element name="S000008595Member" id="wbf_S000008595Member" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration"/>
	<xs:element name="S000008595MSCIACWIExUSAIMINetMember" id="wbf_S000008595MSCIACWIExUSAIMINetMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration"/>
	<xs:element name="MSCIACWIExUSASmallCapIndexNetMember" id="wbf_MSCIACWIExUSASmallCapIndexNetMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration"/>
	<xs:element name="C000023525Member" id="wbf_C000023525Member" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration"/>
	<xs:element name="C000023526Member" id="wbf_C000023526Member" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration"/>
	<xs:element name="C000023527Member" id="wbf_C000023527Member" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration"/>
	<xs:element name="LiquidityRiskMember" id="wbf_LiquidityRiskMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration"/>
	<xs:element name="S000021052Member" id="wbf_S000021052Member" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration"/>
	<xs:element name="MSCIEmergingMarketsIndexNetMember" id="wbf_MSCIEmergingMarketsIndexNetMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration"/>
	<xs:element name="C000059867Member" id="wbf_C000059867Member" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration"/>
	<xs:element name="C000059868Member" id="wbf_C000059868Member" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration"/>
	<xs:element name="C000088850Member" id="wbf_C000088850Member" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration"/>
	<xs:element name="S000008596Member" id="wbf_S000008596Member" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration"/>
	<xs:element name="MSCIEmergingMarketsInvestableMarketIndexNetMember" id="wbf_MSCIEmergingMarketsInvestableMarketIndexNetMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration"/>
	<xs:element name="C000023528Member" id="wbf_C000023528Member" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration"/>
	<xs:element name="C000023529Member" id="wbf_C000023529Member" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration"/>
	<xs:element name="C000023530Member" id="wbf_C000023530Member" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration"/>
	<xs:element name="S000075390Member" id="wbf_S000075390Member" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration"/>
	<xs:element name="MSCIEmergingMarketsExChinaIMIMember" id="wbf_MSCIEmergingMarketsExChinaIMIMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration"/>
	<xs:element name="C000234384Member" id="wbf_C000234384Member" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration"/>
	<xs:element name="C000234385Member" id="wbf_C000234385Member" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration"/>
	<xs:element name="S000034349Member" id="wbf_S000034349Member" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration"/>
	<xs:element name="MSCIEmergingMarketsIMIMember" id="wbf_MSCIEmergingMarketsIMIMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration"/>
	<xs:element name="MSCIEmergingMarketsSmallCapIndexMember" id="wbf_MSCIEmergingMarketsSmallCapIndexMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration"/>
	<xs:element name="C000105753Member" id="wbf_C000105753Member" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration"/>
	<xs:element name="C000105754Member" id="wbf_C000105754Member" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration"/>
	<xs:element name="C000105755Member" id="wbf_C000105755Member" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration"/>
	<xs:element name="PortfolioTurnoverRateRiskMember" id="wbf_PortfolioTurnoverRateRiskMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration"/>
	<xs:element name="S000072753Member" id="wbf_S000072753Member" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration"/>
	<xs:element name="MSCIChinaAllSharesIndexMember" id="wbf_MSCIChinaAllSharesIndexMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration"/>
	<xs:element name="C000229252Member" id="wbf_C000229252Member" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration"/>
	<xs:element name="C000229253Member" id="wbf_C000229253Member" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration"/>
	<xs:element name="InvestingThroughStockConnectRiskMember" id="wbf_InvestingThroughStockConnectRiskMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration"/>
	<xs:element name="ChineseInvestmentRiskMember" id="wbf_ChineseInvestmentRiskMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration"/>
	<xs:element name="S000069167Member" id="wbf_S000069167Member" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration"/>
	<xs:element name="BloombergGlobalAggregateIndexMember" id="wbf_BloombergGlobalAggregateIndexMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration"/>
	<xs:element name="JPMorganEMBIGlobalDiversifiedMember" id="wbf_JPMorganEMBIGlobalDiversifiedMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration"/>
	<xs:element name="C000221008Member" id="wbf_C000221008Member" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration"/>
	<xs:element name="C000221009Member" id="wbf_C000221009Member" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration"/>
	<xs:element name="SovereignAndQuasiSovereignDefaultRiskMember" id="wbf_SovereignAndQuasiSovereignDefaultRiskMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration"/>
	<xs:element name="AggressiveInvestmentTechniqueRiskMember" id="wbf_AggressiveInvestmentTechniqueRiskMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration"/>
	<xs:element name="CounterpartyAndContractualDefaultRiskMember" id="wbf_CounterpartyAndContractualDefaultRiskMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration"/>
	<xs:element name="CreditDefaultSwapRiskMember" id="wbf_CreditDefaultSwapRiskMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration"/>
	<xs:element name="DerivativesRisksMember" id="wbf_DerivativesRisksMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration"/>
	<xs:element name="DistressedDebtRiskMember" id="wbf_DistressedDebtRiskMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration"/>
	<xs:element name="FloatingAndVariableRateSecuritiesRiskMember" id="wbf_FloatingAndVariableRateSecuritiesRiskMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration"/>
	<xs:element name="GovernmentAndRegulatoryRiskMember" id="wbf_GovernmentAndRegulatoryRiskMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration"/>
	<xs:element name="HighYieldSecuritiesRiskMember" id="wbf_HighYieldSecuritiesRiskMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration"/>
	<xs:element name="IncomeRiskMember" id="wbf_IncomeRiskMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration"/>
	<xs:element name="LeverageRiskMember" id="wbf_LeverageRiskMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration"/>
	<xs:element name="PrivatePlacementRiskMember" id="wbf_PrivatePlacementRiskMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration"/>

</xs:schema>
