v3.25.2
Fees and Expenses
Sep. 25, 2025
ARK DIET Q1 Buffer ETF  
Prospectus [Line Items]  
Expense Heading [Optional Text] Fund Fees and Expenses
Expense Narrative [Text Block]

The table below describes the fees and expenses that you pay if you buy, hold and sell shares of the Fund (“Shares”). Investors may pay other fees, such as brokerage commissions and other fees to financial intermediaries on their purchases and sales of Shares, which are not reflected in the tables and examples below.

Other Expenses, New Fund, Based on Estimates [Text] Other Expenses, Acquired Fund Fees and Expenses and Total Annual Fund Operating Expenses are based on estimated expenses for the current fiscal year.
Shareholder Fees Caption [Optional Text] Shareholder Fees (fees paid directly from your investment)
Shareholder Fees [Table]

Shareholder Fees (fees paid directly from your investment)

 

None

Operating Expenses Caption [Optional Text] Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)
Annual Fund Operating Expenses [Table]

Annual Fund Operating Expenses
(expenses that you pay each year as a percentage of the value of your investment)

   

 

Management Fee

 

0.69

%

Distribution and/or Service (12b-1) Fees

 

0.00

%

Other Expenses(a)(b)

 

0.00

%

Acquired Fund Fees and Expenses

 

0.75

%

Total Annual Fund Operating Expenses(b)

 

1.44

%

Fee Waiver(c)

 

0.55

%

Total Annual Fund Operating Expenses After Fee Waiver

 

0.89

%

​(a)     Pursuant to a Supervision Agreement, ARK Investment Management LLC (“ARK” or “Adviser”) pays all other expenses of the Fund (other than acquired fund fees and expenses, taxes and governmental fees, brokerage fees, commissions and other transaction expenses, certain foreign custodial fees and expenses, costs of borrowing money, including interest expenses, and extraordinary expenses (such as litigation and indemnification expenses)).

(b)       Other Expenses, Acquired Fund Fees and Expenses and Total Annual Fund Operating Expenses are based on estimated expenses for the current fiscal year.

(c)     The Adviser has voluntarily agreed to waive a portion of its management fee payable by the Fund in an amount equal to the investment advisory fee portion of the management fee it earns as an investment adviser to the affiliated fund(s)  in which the Fund invests. The fee waiver arrangement will continue for at least one year from the date of this Prospectus and prior to such date the Investment Adviser may not terminate the arrangement without the approval of the Board of Trustees.

Expense Example [Heading] Example
Expense Example Narrative [Text Block]

This example is intended to help you compare the cost of investing in the Fund with the cost of investing in other funds. This example does not take into account brokerage commissions that you pay when purchasing or selling Shares.

The example assumes that you invest $10,000 in the Fund for the time periods indicated and then redeem all of your Shares at the end of those periods. The example also assumes that your investment has a 5% annual return and that the Fund’s operating expenses remain the same (except that the example incorporates any applicable fee waiver and/or expense limitation arrangements for only the first year). Although your actual costs may be higher or lower, based on these assumptions, your costs would be:

Expense Example by, Year, Caption [Text] Although your actual costs may be higher or lower, based on these assumptions, your costs would be:
Expense Example, With Redemption [Table]

Year

     

Expenses

1

     

$  91

3

     

$401

Portfolio Turnover [Heading] Portfolio Turnover
Portfolio Turnover [Text Block]

The Fund pays transaction costs, such as commissions, when it purchases and sells securities (or “turns over” its portfolio). A higher portfolio turnover rate may result in higher transaction costs and higher taxes when Shares are held in a taxable account. These costs, which are not reflected in annual fund operating expenses or in the example, may affect the Fund’s performance. This Fund is newly offered. Therefore, it does not have a turnover rate to report for the most recent fiscal year.

ARK DIET Q2 Buffer ETF  
Prospectus [Line Items]  
Expense Heading [Optional Text] Fund Fees and Expenses
Expense Narrative [Text Block]

The table below describes the fees and expenses that you pay if you buy, hold and sell shares of the Fund (“Shares”). Investors may pay other fees, such as brokerage commissions and other fees to financial intermediaries on their purchases and sales of Shares, which are not reflected in the tables and examples below.

Other Expenses, New Fund, Based on Estimates [Text] Other Expenses, Acquired Fund Fees and Expenses and Total Annual Fund Operating Expenses are based on estimated expenses for the current fiscal year.
Shareholder Fees Caption [Optional Text] Shareholder Fees (fees paid directly from your investment)
Shareholder Fees [Table]

Shareholder Fees (fees paid directly from your investment)

 

None

Operating Expenses Caption [Optional Text] Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)
Annual Fund Operating Expenses [Table]

Annual Fund Operating Expenses

(expenses that you pay each year as a percentage of the value of your investment)

   

 

Management Fee

 

0.69

%

Distribution and/or Service (12b-1) Fees

 

0.00

%

Other Expenses(a)(b)

 

0.00

%

Acquired Fund Fees and Expenses

 

0.75

%

Total Annual Fund Operating Expenses(b)

 

1.44

%

Fee Waiver(c)

 

0.55

%

Total Annual Fund Operating Expenses After Fee Waiver

 

0.89

%

​(a)     Pursuant to a Supervision Agreement, ARK Investment Management LLC (“ARK” or “Adviser”) pays all other expenses of the Fund (other than acquired fund fees and expenses, taxes and governmental fees, brokerage fees, commissions and other transaction expenses, certain foreign custodial fees and expenses, costs of borrowing money, including interest expenses, and extraordinary expenses (such as litigation and indemnification expenses)).

(b)       Other Expenses, Acquired Fund Fees and Expenses and Total Annual Fund Operating Expenses are based on estimated expenses for the current fiscal year.

(c)     The Adviser has voluntarily agreed to waive a portion of its management fee payable by the Fund in an amount equal to the investment advisory fee portion of the management fee it earns as an investment adviser to the affiliated fund(s)  in which the Fund invests. The fee waiver arrangement will continue for at least one year from the date of this Prospectus and prior to such date the Investment Adviser may not terminate the arrangement without the approval of the Board of Trustees.

Expense Example [Heading] Example
Expense Example Narrative [Text Block]

This example is intended to help you compare the cost of investing in the Fund with the cost of investing in other funds. This example does not take into account brokerage commissions that you pay when purchasing or selling Shares.

The example assumes that you invest $10,000 in the Fund for the time periods indicated and then redeem all of your Shares at the end of those periods. The example also assumes that your investment has a 5% annual return and that the Fund’s operating expenses remain the same (except that the example incorporates any applicable fee waiver and/or expense limitation arrangements for only the first year). Although your actual costs may be higher or lower, based on these assumptions, your costs would be:

Expense Example by, Year, Caption [Text] Although your actual costs may be higher or lower, based on these assumptions, your costs would be:
Expense Example, With Redemption [Table]

Year

     

Expenses

1

     

$  91

3

     

$401

Portfolio Turnover [Heading] Portfolio Turnover
Portfolio Turnover [Text Block]

The Fund pays transaction costs, such as commissions, when it purchases and sells securities (or “turns over” its portfolio). A higher portfolio turnover rate may result in higher transaction costs and higher taxes when Shares are held in a taxable account. These costs, which are not reflected in annual fund operating expenses or in the example, may affect the Fund’s performance. This Fund is newly offered. Therefore, it does not have a turnover rate to report for the most recent fiscal year.

ARK DIET Q3 Buffer ETF  
Prospectus [Line Items]  
Expense Heading [Optional Text] Fund Fees and Expenses
Expense Narrative [Text Block]

The table below describes the fees and expenses that you pay if you buy, hold and sell shares of the Fund (“Shares”). Investors may pay other fees, such as brokerage commissions and other fees to financial intermediaries on their purchases and sales of Shares, which are not reflected in the tables and examples below.

Other Expenses, New Fund, Based on Estimates [Text] Other Expenses, Acquired Fund Fees and Expenses and Total Annual Fund Operating Expenses are based on estimated expenses for the current fiscal year.
Shareholder Fees Caption [Optional Text] Shareholder Fees (fees paid directly from your investment)
Shareholder Fees [Table]

Shareholder Fees (fees paid directly from your investment)

 

None

Operating Expenses Caption [Optional Text] Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)
Annual Fund Operating Expenses [Table]

Annual Fund Operating Expenses

(expenses that you pay each year as a percentage of the value of your investment)

   

 

Management Fee

 

0.69

%

Distribution and/or Service (12b-1) Fees

 

0.00

%

Other Expenses(a)(b)

 

0.00

%

Acquired Fund Fees and Expenses

 

0.75

%

Total Annual Fund Operating Expenses(b)

 

1.44

%

Fee Waiver(c)

 

0.55

%

Total Annual Fund Operating Expenses After Fee Waiver

 

0.89

%

​(a)     Pursuant to a Supervision Agreement, ARK Investment Management LLC (“ARK” or “Adviser”) pays all other expenses of the Fund (other than acquired fund fees and expenses, taxes and governmental fees, brokerage fees, commissions and other transaction expenses, certain foreign custodial fees and expenses, costs of borrowing money, including interest expenses, and extraordinary expenses (such as litigation and indemnification expenses)).

(b)       Other Expenses, Acquired Fund Fees and Expenses and Total Annual Fund Operating Expenses are based on estimated expenses for the current fiscal year.

(c)     The Adviser has voluntarily agreed to waive a portion of its management fee payable by the Fund in an amount equal to the investment advisory fee portion of the management fee it earns as an investment adviser to the affiliated fund(s)  in which the Fund invests. The fee waiver arrangement will continue for at least one year from the date of this Prospectus and prior to such date the Investment Adviser may not terminate the arrangement without the approval of the Board of Trustees.

Expense Example [Heading] Example
Expense Example Narrative [Text Block]

This example is intended to help you compare the cost of investing in the Fund with the cost of investing in other funds. This example does not take into account brokerage commissions that you pay when purchasing or selling Shares.

The example assumes that you invest $10,000 in the Fund for the time periods indicated and then redeem all of your Shares at the end of those periods. The example also assumes that your investment has a 5% annual return and that the Fund’s operating expenses remain the same (except that the example incorporates any applicable fee waiver and/or expense limitation arrangements for only the first year). Although your actual costs may be higher or lower, based on these assumptions, your costs would be:

Expense Example by, Year, Caption [Text] Although your actual costs may be higher or lower, based on these assumptions, your costs would be:
Expense Example, With Redemption [Table]

Year

     

Expenses

1

     

$  91

3

     

$401

Portfolio Turnover [Heading] Portfolio Turnover
Portfolio Turnover [Text Block]

The Fund pays transaction costs, such as commissions, when it purchases and sells securities (or “turns over” its portfolio). A higher portfolio turnover rate may result in higher transaction costs and higher taxes when Shares are held in a taxable account. These costs, which are not reflected in annual fund operating expenses or in the example, may affect the Fund’s performance. This Fund is newly offered. Therefore, it does not have a turnover rate to report for the most recent fiscal year.

ARK DIET Q4 Buffer ETF  
Prospectus [Line Items]  
Expense Heading [Optional Text] Fund Fees and Expenses
Expense Narrative [Text Block]

The table below describes the fees and expenses that you pay if you buy, hold and sell shares of the Fund (“Shares”). Investors may pay other fees, such as brokerage commissions and other fees to financial intermediaries on their purchases and sales of Shares, which are not reflected in the tables and examples below.

Other Expenses, New Fund, Based on Estimates [Text] Other Expenses, Acquired Fund Fees and Expenses and Total Annual Fund Operating Expenses are based on estimated expenses for the current fiscal year.
Shareholder Fees Caption [Optional Text] Shareholder Fees (fees paid directly from your investment)
Shareholder Fees [Table]

Shareholder Fees (fees paid directly from your investment)

 

None

Operating Expenses Caption [Optional Text] Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)
Annual Fund Operating Expenses [Table]

Annual Fund Operating Expenses
(expenses that you pay each year as a percentage of the value of your investment)

   

 

Management Fee

 

0.69

%

Distribution and/or Service (12b-1) Fees

 

0.00

%

Other Expenses(a)(b)

 

0.00

%

Acquired Fund Fees and Expenses

 

0.75

%

Total Annual Fund Operating Expenses(b)

 

1.44

%

Fee Waiver(c)

 

0.55

%

Total Annual Fund Operating Expenses After Fee Waiver

 

0.89

%

​(a)     Pursuant to a Supervision Agreement, ARK Investment Management LLC (“ARK” or “Adviser”) pays all other expenses of the Fund (other than acquired fund fees and expenses, taxes and governmental fees, brokerage fees, commissions and other transaction expenses, certain foreign custodial fees and expenses, costs of borrowing money, including interest expenses, and extraordinary expenses (such as litigation and indemnification expenses)).

(b)       Other Expenses, Acquired Fund Fees and Expenses and Total Annual Fund Operating Expenses are based on estimated expenses for the current fiscal year.

(c)     The Adviser has voluntarily agreed to waive a portion of its management fee payable by the Fund in an amount equal to the investment advisory fee portion of the management fee it earns as an investment adviser to the affiliated fund(s)  in which the Fund invests. The fee waiver arrangement will continue for at least one year from the date of this Prospectus and prior to such date the Investment Adviser may not terminate the arrangement without the approval of the Board of Trustees.

Expense Example [Heading] Example
Expense Example Narrative [Text Block]

This example is intended to help you compare the cost of investing in the Fund with the cost of investing in other funds. This example does not take into account brokerage commissions that you pay when purchasing or selling Shares.

The example assumes that you invest $10,000 in the Fund for the time periods indicated and then redeem all of your Shares at the end of those periods. The example also assumes that your investment has a 5% annual return and that the Fund’s operating expenses remain the same (except that the

example incorporates any applicable fee waiver and/or expense limitation arrangements for only the first year). Although your actual costs may be higher or lower, based on these assumptions, your costs would be:

Expense Example by, Year, Caption [Text] Although your actual costs may be higher or lower, based on these assumptions, your costs would be:
Expense Example, With Redemption [Table]

Year

     

Expenses

1

     

$  91

3

     

$401

Portfolio Turnover [Heading] Portfolio Turnover
Portfolio Turnover [Text Block]

The Fund pays transaction costs, such as commissions, when it purchases and sells securities (or “turns over” its portfolio). A higher portfolio turnover rate may result in higher transaction costs and higher taxes when Shares are held in a taxable account. These costs, which are not reflected in annual fund operating expenses or in the example, may affect the Fund’s performance. This Fund is newly offered. Therefore, it does not have a turnover rate to report for the most recent fiscal year.