ALPS Sector Dividend Dogs ETF ALPS Sector Dividend Dogs ETF Shares Investment Risk Value Investing Risk Market Risk Non-Correlation Risk Index Management Risk Issuer-Specific Risk Underlying Segment Risk High Dividend Yield Style Risk Fluctuation of Net Asset Value S-Network® Sector Dividend Dogs Index (reflects no deduction for fees, expenses or taxes) S&P 500® Index (reflects no deduction for fees, expenses or taxes) ALPS International Sector Dividend Dogs ETF ALPS International Sector Dividend Dogs ETF Shares Foreign Investment Risk Geographic Concentration Risk S-Network® International Sector Dividend Dogs Index (reflects no deduction for fees, expenses or taxes) Morningstar Developed Markets ex-North America Index (reflects no deduction for fees, expenses or taxes) ALPS Emerging Sector Dividend Dogs ETF ALPS Emerging Sector Dividend Dogs ETF Shares Emerging Markets Risk Risk of Cash Transactions S-Network Emerging Sector Dividend Dogs Index* (reflects no deduction for fees, expenses or taxes) Morningstar Emerging Markets Index*,‡ (reflects no deduction for fees, expenses or taxes) ALPS REIT Dividend Dogs ETF ALPS REIT Dividend Dogs ETF Shares Real Estate Investment Risk REIT Investment Risk Small- and Mid-Capitalization Company Risk Concentration Risk Interest Rate Risk [Member] Leverage Risk Liquidity Risk Management Risk Property Risk Regulatory Risk Repayment Risk Depositary Receipt Risk S-Network® REIT Dividend Dogs Index (reflects no deduction for fees, expenses or taxes) S-Network® US Composite REIT Index (reflects no deduction for fees, expenses or taxes) S-Network® REIT Dividend Dogs Index/S&P United States REIT Index (reflects no deductions for fees, expenses or taxes) Bloomberg US 1000 Index (reflects no deductions for fees, expenses or taxes) Alps Equal Sector Weight ETF Alps Equal Sector Weight ETF Shares Fund of Funds Risk Underlying Sector ETFs Risk NYSE® Equal Sector Weight Index (reflects no deduction for fees, expenses or taxes) S&P 500® Index (reflects no deduction for fees, expenses or taxes) ALERIAN MLP ETF ALERIAN MLP ETF Shares Tax Status of the Fund Deferred Tax Liability Potential Substantial After-Tax Tracking Error from Underlying Index Performance Returns of Capital Distributions From the Fund Reduce the Tax Basis of Fund Shares Industry Specific Risks MLP Risk MLP Tax Risk Alerian MLP Infrastructure Index (reflects no deduction for fees, expenses or taxes) Alerian MLP Index* (reflects no deduction for fees, expenses or taxes) Bloomberg US 1000 Index (reflects no deduction for fees, expenses or taxes) Alerian Energy Infrastructure ETF Alerian Energy Infrastructure ETF Shares Canadian Investment Risk Alerian Midstream Energy Select Index (reflects no deduction for fees, expenses or taxes) Alerian MLP Index (reflects no deduction for fees, expenses or taxes) Bloomberg US 1000 Index (reflects no deduction for fees, expenses or taxes) RiverFront Strategic Income Fund RiverFront Strategic Income Fund Shares Credit/Default Risk Junk Bond Risk Call Risk/Prepayment Risk Income Risk U.S. Government Securities Risk Foreign Currency Risk Risk of Investment in Other Investment Companies Convertible Securities Risk Preferred Stock Risk Active Management Risk Swaps Risk Derivatives Risk Forward Currency Contracts Risk Asset Allocation Program Risk Bloomberg US Aggregate Bond Index (reflects no deduction for fees, expenses or taxes) ALPS Dynamic Core Income ETF ALPS Dynamic Core Income ETF Shares Quantitative Methodology Risk Bloomberg US Aggregate Bond Index (reflects no deduction for fees, expenses or taxes) ALPS Dynamic US Dividend Advantage ETF ALPS Dynamic US Dividend Advantage ETF Shares Equity Risk Dividend-Paying Stock Risk Financial Services Sector Risk Growth Investment Risk Momentum Investing Risk Portfolio Turnover Risk S&P 500 Index (reflects no deduction for fees, expenses or taxes) ALPS Active Equity Opportunity ETF ALPS Active Equity Opportunity ETF Shares Information Technology Sector Risk S&P Composite 1500® Index (reflects no deduction for fees, expenses or taxes) Bloomberg US 1000 Index (reflects no deduction for fees, expenses or taxes) Barron's 400 ETF Barron's 400 ETF Shares Barron’s 400 Index SM (reflects no deduction for fees, expenses or taxes) Bloomberg US 1000 Index (reflects no deductions for fees, expenses or taxes) ALPS Medical Breakthroughs ETF ALPS Medical Breakthroughs ETF Shares Biotechnology Industry Risk S-Network® Medical Breakthroughs Index (reflects no deduction for fees, expenses or taxes) NASDAQ Biotechnology Index (reflects no deduction for fees, expenses or taxes) Bloomberg US 1000 Index (reflects no deduction for fees, expenses or taxes) ALPS DISRUPTIVE TECHNOLOGIES ETF ALPS DISRUPTIVE TECHNOLOGIES ETF Shares Financial Technology Sector Risk Health Care Sector Risk Disruptive Technology Risk Micro-Capitalization Company Risk Large Capitalization Company Risk Quantitative and Qualitative Methodology Risk Indxx Disruptive Technologies Index (reflects no deduction for fees, expenses or taxes) Morningstar Global Markets Index (reflects no deduction for fees, expenses or taxes) ALPS Clean Energy ETF ALPS Clean Energy ETF Shares Clean Energy Sector Risk Consumer Discretionary Sector Risk Industrials Sector Risk Utilities Sector Risk Risks Related to Investments in the Solar Energy Companies Return of Capital Risk CIBC Atlas Clean Energy Index (reflects no deduction for fees, expenses or taxes) S&P 1000 Index (reflects no deduction for fees, expenses or taxes) Bloomberg US 1000 Index (reflects no deduction for fees, expenses or taxes) ALPS Active REIT ETF ALPS Active REIT ETF Shares REITs Investment Risk Small-, Mid- and Large-Capitalization Company Risk S&P United States REIT Index (reflects no deduction for fees, expenses or taxes) Bloomberg US 1000 Index (reflects no deduction for fees, expenses or taxes) ALPS | Smith Core Plus Bond ETF ALPS | Smith Core Plus Bond ETF Shares Fixed Income Securities Risk Corporate Debt Risk Credit Risk [Member] Sector and Securities Selection Risk High-Yield/High-Risk Bond Risk Liquidity and Valuation Risk Mortgage-Backed and Asset-Backed Securities Risk Sovereign Debt Risk Managed Portfolio Risk Prepayment and Extension Risk Call Risk Income Generation Risk Floating Rate Obligations Risk Bloomberg US Aggregate Bond Index (reflects no deduction for fees, expenses or taxes) Level Four Large Cap Growth Active ETF Level Four Large Cap Growth Active ETF Shares Sector Risk New Fund Risk Bloomberg US 1000 Growth Index (reflects no deduction for fees, expenses or taxes) Bloomberg US 1000 Index (reflects no deduction for fees, expenses or taxes)  ALPS | BBH Intermediate Municipal Bond ETF ALPS | BBH Intermediate Municipal Bond ETF Shares Illiquid Investment Risk Municipal Issuer Risk Municipal Revenue Sector Risk Geographic Risk Taxation Risk Shareholder Concentration Risk ESG Integration Risk Bloomberg Municipal Bond 1-15 Year Blend Index (reflects no deduction for fees, expenses or taxes) Bloomberg Municipal Bond Index (reflects no deduction for fees, expenses or taxes) ALPS | O'Shares U.S. Quality Dividend ETF ALPS | O'Shares U.S. Quality Dividend ETF Shares Multifactor Risk Quality Stocks Risk Volatility Risk Sampling Risk Tracking Error Risk Mid- and Large-Capitalization Company Risk Cash and Cash Equivalents Risk O’Shares U.S. Quality Dividend Index Morningstar US Large-Mid Cap Broad Value Index Bloomberg US 1000 Index ALPS | O'Shares U.S. Small-Cap Quality Dividend ETF ALPS | O'Shares U.S. Small-Cap Quality Dividend ETF Shares O’Shares U.S. Small-Cap Quality Dividend Index Morningstar US Small-Cap Broad Value Extended Index Bloomberg US 1000 Index ALPS | O'Shares Global Internet Giants ETF ALPS | O'Shares Global Internet Giants ETF Shares Internet Companies Risk Depositary Receipts Risk O’Shares Global Internet Giants Index NASDAQ 100 Index Bloomberg US 1000 Index ALPS | O'Shares International Developed Quality Dividend ETF ALPS | O'Shares International Developed Quality Dividend ETF Shares O’Shares International Developed Quality Dividend Index Bloomberg Developed Markets ex US Large, Mid & Small Cap Index Morningstar Europe Index ALPS Electrification Infrastructure ETF ALPS Electrification Infrastructure ETF Shares Associated Risks Related to Investing in Electrification Companies Energy Sector Risk Materials Sector Risk Index9Member Index29Member Index7Member Index6Member Index23Member Index3Member Index32Member Index34Member Index50Member Index42Member Index45Member