v3.26.1
Label Element Value
Calamos Timpani Active Growth Opportunities ETF  
Prospectus [Line Items] oef_ProspectusLineItems  
Risk/Return [Heading] oef_RiskReturnHeading Calamos Timpani Active SMID Growth ETF
Objective [Heading] oef_ObjectiveHeading Investment Objective
Objective, Primary [Text Block] oef_ObjectivePrimaryTextBlock

Calamos Timpani Active SMID Growth ETF (the “Fund”) seeks capital appreciation.
Expense Heading [Optional Text] oef_ExpenseHeading Fees and Expenses of the Fund
Expense Narrative [Text Block] oef_ExpenseNarrativeTextBlock

The following table describes the fees and expenses that you may pay if you buy, hold and sell shares of the Fund (“Fund Shares”). Investors may pay other fees, such as brokerage commissions and other fees to financial intermediaries, which are not reflected in the tables and examples below.
Operating Expenses Caption [Optional Text] oef_OperatingExpensesCaption Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment):
Other Expenses, New Fund, Based on Estimates [Text] oef_OtherExpensesNewFundBasedOnEstimates “Other Expenses” are based on estimated amounts for the current fiscal year.
Expense Example [Heading] oef_ExpenseExampleHeading Example
Expense Example Narrative [Text Block] oef_ExpenseExampleNarrativeTextBlock

This example is intended to help you compare the cost of investing in the Fund with the cost of investing in other funds. The example assumes that you invest $10,000 in the Fund for the time periods indicated, and then sell all of your Fund Shares at the end of those periods. The example also assumes that your investment has a 5% return each year and that the Fund’s operating expenses remain the same. Although your actual costs may be higher or lower, based on these assumptions your costs, whether you sell or hold your Fund Shares, would be:
Expense Example by, Year, Caption [Text] oef_ExpenseExampleByYearCaption You would pay the following expenses whether you sell or hold your Fund Shares at the end of the period:
Expense Example, No Redemption, By Year, Caption [Text] oef_ExpenseExampleNoRedemptionByYearCaption You would pay the following expenses whether you sell or hold your Fund Shares at the end of the period:
Portfolio Turnover [Heading] oef_PortfolioTurnoverHeading Portfolio Turnover
Portfolio Turnover [Text Block] oef_PortfolioTurnoverTextBlock

The Fund pays transaction costs, such as commissions, when it buys and sells securities (or “turns over” its portfolio). A higher portfolio turnover rate may indicate higher transaction costs and may result in higher taxes when Fund Shares are held in a taxable account. These costs, which are not reflected in Annual Fund Operating Expenses or in the example, affect the Fund’s performance.

The Fund’s portfolio turnover rate is not available as the Fund had not commenced investment operations as of the date of this prospectus. The portfolio turnover rate of the Calamos Timpani SMID Growth Fund (the “Predecessor Fund”) was 192% for the fiscal year ended October 31, 2025.
Portfolio Turnover, Rate oef_PortfolioTurnoverRate 192.00%
Strategy [Heading] oef_StrategyHeading Principal Investment Strategies
Strategy Narrative [Text Block] oef_StrategyNarrativeTextBlock

Under normal circumstances, the Fund invests at least 80% of its net assets (plus any borrowings for investment purposes) in growth equity securities of small and mid-capitalization companies of issuers primarily located in the United States. The Fund defines a small and mid-capitalization company as any company with a market capitalization less than or equal to that of the company with the largest market capitalization of either the Russell 2500® Index or the MSCI USA SMID Cap Index as measured on a rolling 24-month basis over the most recent period. The market capitalization of a security is measured at the time of purchase. Calamos Advisors LLC (“Calamos Advisors”) defines “growth” to include any company, security or instrument if any of the following characteristics rank better than average when compared to the Fund’s broad-based equity index (long-term projected earnings growth, book value growth, sales growth, cash flow growth and historical earnings

growth) or if the company is included as a constituent in any of the growth indices published by third-party index providers or if the security or instrument tracks the performance of a growth index. Calamos Advisors uses fundamental research to evaluate investment opportunities, focusing on companies that it believes have superior management and whose business models have a high potential for earnings upside. Equity securities in which the Fund invests as a part of its principal investment strategy consist of common stocks and American Depositary Receipts (“ADRs”). The Fund may invest up to 25% of its net assets in foreign securities. Foreign securities are securities issued by issuers that are organized under the laws of a foreign country, that have a substantial portion of their operations or assets in a foreign country or countries, or that derive a substantial portion of their revenue or profits from businesses, investments or sales outside of the United States. The Fund may also invest in foreign securities that are represented in the United States securities markets by ADRs or similar depositary arrangements. The Fund’s foreign investments can be denominated in U.S. dollars or in foreign currencies. Calamos Advisors may actively trade portfolio securities. From time to time, the Fund may have significant investments in certain sectors due to Calamos Advisors’ investment process yielding opportunities for sound growth potential within those sectors. The Fund’s sector exposure may vary.
Bar Chart and Performance Table [Heading] oef_BarChartAndPerformanceTableHeading Fund Performance
Performance Narrative [Text Block] oef_PerformanceNarrativeTextBlock

The Fund has not commenced operations as of the date of this prospectus. Simultaneous with the Fund’s commencement of operations, which is anticipated to occur on or about September 18, 2026, the Fund will acquire the assets and assume the liabilities of the Calamos Timpani SMID Growth Fund (the “Predecessor Fund”) in a reorganization (the “Reorganization”). As a result of the Reorganization, the Fund will adopt the performance and financial history of the Predecessor Fund’s Class I shares.

The accompanying bar chart and table provide some indication of the risks of investing in the Predecessor Fund. The bar chart shows changes in the Predecessor Fund’s performance from year to year (represented by the performance of the Predecessor Fund’s Class I). The table shows the average annual total returns of the Predecessor Fund and also compares the Predecessor Fund’s performance with the average annual total returns of a broad measure of market performance. The Fund has the same investment goal and substantially similar strategies as the Predecessor Fund. However, the Fund has a lower net expense ratio than each share class of the Predecessor Fund. As a result, the performance returns of the Fund for the periods shown would have been different than those of the Predecessor Fund. Had the Predecessor Fund been structured as an ETF, its performance may have differed.
Performance Information Illustrates Variability of Returns [Text] oef_PerformanceInformationIllustratesVariabilityOfReturns The accompanying bar chart and table provide some indication of the risks of investing in the Predecessor Fund. The bar chart shows changes in the Predecessor Fund’s performance from year to year (represented by the performance of the Predecessor Fund’s Class I). The table shows the average annual total returns of the Predecessor Fund and also compares the Predecessor Fund’s performance with the average annual total returns of a broad measure of market performance.
Performance One Year or Less [Text] oef_PerformanceOneYearOrLess The Fund has not commenced operations as of the date of this prospectus.
Performance Additional Market Index [Text] oef_PerformanceAdditionalMarketIndex The Fund’s investment adviser added the broad-based securities market index in accordance with regulatory disclosure requirements. The Fund continues to use the Russell 2500 Growth Index as an additional benchmark because the investment adviser believes it is more representative of the Fund’s investment universe than the broad-based securities market index. All index returns include the reinvestment of dividends and distributions net of withholding taxes, but do not reflect fees, brokerage commissions, or other expenses.
Performance Availability Website Address [Text] oef_PerformanceAvailabilityWebSiteAddress www.Calamos.com
Performance Past Does Not Indicate Future [Text] oef_PerformancePastDoesNotIndicateFuture The Fund’s (and Predecessor Fund’s) past performance (before and after taxes) is not necessarily an indication of how the Fund will perform in the future.
Bar Chart [Heading] oef_BarChartHeading CLASS I* ANNUAL TOTAL RETURN FOR YEARS ENDED 12.31
Bar Chart Footnotes [Text Block] oef_BarChartFootnotesTextBlock
*
Annual returns for Class I are provided because Class I shares represent the largest percentage of assets in the Calamos Family of Funds.
Bar Chart Closing [Text Block] oef_BarChartClosingTextBlock

Highest Quarterly Return:

37.58% (6.30.20)

Lowest Quarterly Return:

-22.94% (6.30.22)
Highest Quarterly Return, Label [Optional Text] oef_HighestQuarterlyReturnLabel Highest Quarterly Return:
Highest Quarterly Return, Date oef_BarChartHighestQuarterlyReturnDate Jun. 30, 2020
Highest Quarterly Return oef_BarChartHighestQuarterlyReturn 37.58%
Lowest Quarterly Return, Label [Optional Text] oef_LowestQuarterlyReturnLabel Lowest Quarterly Return:
Lowest Quarterly Return, Date oef_BarChartLowestQuarterlyReturnDate Jun. 30, 2022
Lowest Quarterly Return oef_BarChartLowestQuarterlyReturn (22.94%)
Performance Table Narrative oef_PerformanceTableNarrativeTextBlock

The Fund makes updated performance information, including its current net asset value per share, available at www.Calamos.com.

The Fund’s (and Predecessor Fund’s) past performance (before and after taxes) is not necessarily an indication of how the Fund will perform in the future.
Average Annual Return, Caption [Optional Text] oef_AverageAnnualReturnCaption AVERAGE ANNUAL TOTAL RETURNS — FOR THE PERIODS ENDED 12.31.25
Calamos Timpani Active Growth Opportunities ETF | Risk Lose Money [Member]  
Prospectus [Line Items] oef_ProspectusLineItems  
Risk [Text Block] oef_RiskTextBlock An investment in the Fund is subject to risks, and you could lose money on your investment in the Fund.
Calamos Timpani Active Growth Opportunities ETF | Risk Not Insured [Member]  
Prospectus [Line Items] oef_ProspectusLineItems  
Risk [Text Block] oef_RiskTextBlock Your investment in the Fund is not a deposit in a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.
Calamos Timpani Active Growth Opportunities ETF | American Depositary Receipts Risk [Member]  
Prospectus [Line Items] oef_ProspectusLineItems  
Risk [Text Block] oef_RiskTextBlock

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American Depositary Receipts Risk — The stocks of most foreign companies that trade in the U.S. markets are traded as ADRs. U.S. depositary banks issue these stocks. Each ADR represents one or more shares of foreign stock or a fraction of a share. The price of an ADR corresponds to the price of the foreign stock in its home market, adjusted to the ratio of the ADRs to foreign company shares. Therefore while purchasing a security on a U.S. exchange, the risks inherently associated with foreign investing still apply to ADRs.
Calamos Timpani Active Growth Opportunities ETF | Authorized Participant Concentration Risk [Member]  
Prospectus [Line Items] oef_ProspectusLineItems  
Risk [Text Block] oef_RiskTextBlock

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Authorized Participant Concentration Risk — Only an Authorized Participant may engage in creation or redemption transactions directly with the Fund, and none of those Authorized Participants is obligated to engage in creation and/or redemption transactions.
Calamos Timpani Active Growth Opportunities ETF | Cash Holdings Risk [Member]  
Prospectus [Line Items] oef_ProspectusLineItems  
Risk [Text Block] oef_RiskTextBlock

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Cash Holdings Risk — To the extent the Fund holds cash positions, the Fund risks achieving lower returns and potential lost opportunities to participate in market appreciation which could negatively impact the Fund’s performance and ability to achieve its investment objective.
Calamos Timpani Active Growth Opportunities ETF | Costs of Buying and Selling Fund Shares [Member]  
Prospectus [Line Items] oef_ProspectusLineItems  
Risk [Text Block] oef_RiskTextBlock

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Costs of Buying and Selling Fund Shares — Due to the costs of buying or selling Fund Shares, including brokerage commissions imposed by brokers and bid/ask spreads, frequent trading of Fund Shares may significantly reduce investment results and an investment in Fund Shares may not be advisable for investors who anticipate regularly making small investments.
Calamos Timpani Active Growth Opportunities ETF | Currency Risk [Member]  
Prospectus [Line Items] oef_ProspectusLineItems  
Risk [Text Block] oef_RiskTextBlock

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Currency Risk — To the extent that the Fund invests in securities or other instruments denominated in or indexed to foreign currencies, changes in currency exchange rates bring an added dimension of risk. Currency fluctuations could negatively impact investment gains or add to investment losses. Although the Fund may attempt to hedge against currency risk, the hedging instruments may not always perform as the Fund expects and could produce losses. Suitable hedging instruments may not be available for currencies of emerging market countries. The Fund’s investment adviser may determine not to hedge currency risks, even if suitable instruments appear to be available.
Calamos Timpani Active Growth Opportunities ETF | Equity Securities Risk [Member]  
Prospectus [Line Items] oef_ProspectusLineItems  
Risk [Text Block] oef_RiskTextBlock

•

Equity Securities Risk — The securities markets are volatile, and the market prices of the Fund’s securities may decline generally. The price of equity securities fluctuates based on changes in a company’s financial condition and overall market

and economic conditions. If the market prices of the securities owned by the Fund (i.e., the Fund’s long position) fall, the value of your investment in the Fund will decline.
Calamos Timpani Active Growth Opportunities ETF | Foreign Securities Risk [Member]  
Prospectus [Line Items] oef_ProspectusLineItems  
Risk [Text Block] oef_RiskTextBlock

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Foreign Securities Risk — Risks associated with investing in foreign securities include fluctuations in the exchange rates of foreign currencies that may affect the U.S. dollar value of a security, the possibility of substantial price volatility as a result of political and economic instability in the foreign country, less public information about issuers of securities, different securities regulation, different accounting, auditing and financial reporting standards and less liquidity than in U.S. markets.
Calamos Timpani Active Growth Opportunities ETF | Growth Stock Risk [Member]  
Prospectus [Line Items] oef_ProspectusLineItems  
Risk [Text Block] oef_RiskTextBlock

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Growth Stock Risk — Growth securities typically trade at higher multiples of current earnings than other securities and, therefore, may be more sensitive to changes in current or expected earnings than other equity securities and may be more volatile.
Calamos Timpani Active Growth Opportunities ETF | Liquidity Risk [Member]  
Prospectus [Line Items] oef_ProspectusLineItems  
Risk [Text Block] oef_RiskTextBlock

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Liquidity Risk — Liquidity risk exists when particular investments are difficult to purchase or sell. The Fund’s investments in illiquid securities may reduce the returns of the Fund because it may be unable to sell the illiquid securities at an advantageous time or price.
Calamos Timpani Active Growth Opportunities ETF | Market risk [Member]  
Prospectus [Line Items] oef_ProspectusLineItems  
Risk [Text Block] oef_RiskTextBlock

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Market risk — The risk that the securities markets will increase or decrease in value is considered market risk and applies to any security. If there is a general decline in the stock or fixed-income market, it is possible your investment may lose value regardless of the individual results of the companies in which a Fund invests.
Calamos Timpani Active Growth Opportunities ETF | Portfolio Selection Risk [Member]  
Prospectus [Line Items] oef_ProspectusLineItems  
Risk [Text Block] oef_RiskTextBlock

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Portfolio Selection Risk — The value of your investment may decrease if the investment adviser’s judgment about the attractiveness, value or market trends affecting a particular security, issuer, industry, or sector or about market movements is incorrect.
Calamos Timpani Active Growth Opportunities ETF | Portfolio Turnover Risk [Member]  
Prospectus [Line Items] oef_ProspectusLineItems  
Risk [Text Block] oef_RiskTextBlock

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Portfolio Turnover Risk — The portfolio manager(s) may actively and frequently trade securities or other instruments in the Fund’s portfolio to carry out its investment strategies. A high portfolio turnover rate increases transaction costs, which may increase the Fund’s expenses. Frequent and active trading may also cause adverse tax consequences for investors in the Fund due to an increase in short-term capital gains.
Calamos Timpani Active Growth Opportunities ETF | Premium-Discount Risk [Member]  
Prospectus [Line Items] oef_ProspectusLineItems  
Risk [Text Block] oef_RiskTextBlock

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Premium-Discount Risk — Fund Shares may trade above or below their NAV. The market prices of Fund Shares will generally fluctuate in accordance with changes in NAV as well as the relative supply of, and demand for, Fund Shares on the Exchange. The trading price of Fund Shares may deviate significantly from NAV during periods of market volatility.
Calamos Timpani Active Growth Opportunities ETF | Secondary Market Trading Risk [Member]  
Prospectus [Line Items] oef_ProspectusLineItems  
Risk [Text Block] oef_RiskTextBlock

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Secondary Market Trading Risk — Investors buying or selling Fund Shares in the secondary market will pay brokerage commissions or other charges imposed by brokers as determined by that broker. Brokerage commissions are often a fixed amount and may be a significant proportional cost for investors seeking to buy or sell relatively small amounts of Fund Shares. Although the Fund Shares are listed on the Exchange, there can be no assurance that an active or liquid trading market for them will develop or be maintained. The Fund’s shares may trade at prices substantially different from NAV during periods of market stress or when the complex underlying derivatives are difficult to value. In addition, trading in Fund Shares on the Exchange may be halted.
Calamos Timpani Active Growth Opportunities ETF | Sector Risk [Member]  
Prospectus [Line Items] oef_ProspectusLineItems  
Risk [Text Block] oef_RiskTextBlock

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Sector Risk — To the extent the Fund invests a significant portion of its assets in a particular sector, a greater portion of the Fund’s performance may be affected by the general business and economic conditions affecting that sector. Each sector may share economic risk with the broader market, however there may be economic risks specific to each sector. As a result, returns from those sectors may trail returns from the overall stock market and it is possible that the Fund may underperform the broader market, or experience greater volatility.
Calamos Timpani Active Growth Opportunities ETF | Small and Mid-Sized Company Stock Risk [Member]  
Prospectus [Line Items] oef_ProspectusLineItems  
Risk [Text Block] oef_RiskTextBlock

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Small and Mid-Sized Company Stock Risk — Small to mid-sized company stocks have historically been subject to greater investment risk than large company stocks. The prices of small to mid-sized company stocks tend to be more volatile and less liquid than large company stocks. Small and mid-sized companies may have no or relatively short operating histories, or be newly formed public companies. Some of these companies have aggressive capital structures, including high debt levels, or are involved in rapidly growing or changing industries and/or new technologies, which pose additional risks.
Calamos Timpani Active Growth Opportunities ETF | Tax Risk [Member]  
Prospectus [Line Items] oef_ProspectusLineItems  
Risk [Text Block] oef_RiskTextBlock

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Tax Risk — The Fund intends to elect and to qualify each year to be treated as a regulated investment company (“RIC”) under Subchapter M of the Code. As a RIC, the Fund is generally not subject to corporate-level U.S. federal income tax

on any net ordinary income or capital gains that are timely distributed to shareholders. If the Fund does not qualify as a RIC for any taxable year and certain relief provisions are not available, the Fund’s taxable income will be subject to tax at the Fund level and to a further tax at the shareholder level when such income is distributed.
Calamos Timpani Active Growth Opportunities ETF | Trading Issues Risk [Member]  
Prospectus [Line Items] oef_ProspectusLineItems  
Risk [Text Block] oef_RiskTextBlock

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Trading Issues Risk — Trading in Fund Shares on the Exchange may be halted due to market conditions or for reasons that, in the view of the Exchange, make trading in shares inadvisable. Further, there can be no assurance that the requirements of the Exchange necessary to maintain the listing of the Fund will continue to be met or will remain unchanged.
Calamos Timpani Active Growth Opportunities ETF | Calamos Timpani Active Growth Opportunities ETF  
Prospectus [Line Items] oef_ProspectusLineItems  
Management Fees (as a percentage of Assets) oef_ManagementFeesOverAssets 0.79%
Distribution and Service (12b-1) Fees oef_DistributionAndService12b1FeesOverAssets 0.00%
Other Expenses (as a percentage of Assets): oef_OtherExpensesOverAssets 0.00% [1]
Expenses (as a percentage of Assets) oef_ExpensesOverAssets 0.79%
Expense Example, with Redemption, 1 Year oef_ExpenseExampleYear01 $ 81
Expense Example, with Redemption, 3 Years oef_ExpenseExampleYear03 252
Expense Example, No Redemption, 1 Year oef_ExpenseExampleNoRedemptionYear01 81
Expense Example, No Redemption, 3 Years oef_ExpenseExampleNoRedemptionYear03 $ 252
Russell 2500 Growth Index  
Prospectus [Line Items] oef_ProspectusLineItems  
Average Annual Return, Percent oef_AvgAnnlRtrPct 10.31%
Average Annual Return, Percent oef_AvgAnnlRtrPct 2.98%
Average Annual Return, Percent oef_AvgAnnlRtrPct 8.61%
Russell 3000 Total Return Index  
Prospectus [Line Items] oef_ProspectusLineItems  
Average Annual Return, Percent oef_AvgAnnlRtrPct 17.15% [2]
Average Annual Return, Percent oef_AvgAnnlRtrPct 13.15% [2]
Average Annual Return, Percent oef_AvgAnnlRtrPct 14.70% [2]
Class A  
Prospectus [Line Items] oef_ProspectusLineItems  
Average Annual Return, Percent oef_AvgAnnlRtrPct 15.25%
Average Annual Return, Percent oef_AvgAnnlRtrPct 5.33%
Average Annual Return, Percent oef_AvgAnnlRtrPct 11.18%
Performance Inception Date oef_PerfInceptionDate Jul. 31, 2019
Class I  
Prospectus [Line Items] oef_ProspectusLineItems  
Annual Return [Percent] oef_AnnlRtrPct 58.94%
Annual Return [Percent] oef_AnnlRtrPct 7.89%
Annual Return [Percent] oef_AnnlRtrPct (34.88%)
Annual Return [Percent] oef_AnnlRtrPct 12.26%
Annual Return [Percent] oef_AnnlRtrPct 44.10%
Annual Return [Percent] oef_AnnlRtrPct 21.25%
Average Annual Return, Percent oef_AvgAnnlRtrPct 21.25%
Average Annual Return, Percent oef_AvgAnnlRtrPct 6.63%
Average Annual Return, Percent oef_AvgAnnlRtrPct 12.31%
Performance Inception Date oef_PerfInceptionDate Jul. 31, 2019
Class I | After Taxes on Distributions  
Prospectus [Line Items] oef_ProspectusLineItems  
Average Annual Return, Percent oef_AvgAnnlRtrPct 20.00% [3]
Average Annual Return, Percent oef_AvgAnnlRtrPct 5.55% [3]
Average Annual Return, Percent oef_AvgAnnlRtrPct 11.43% [3]
Class I | After Taxes on Distributions and Sales  
Prospectus [Line Items] oef_ProspectusLineItems  
Average Annual Return, Percent oef_AvgAnnlRtrPct 13.49% [3]
Average Annual Return, Percent oef_AvgAnnlRtrPct 4.92% [3]
Average Annual Return, Percent oef_AvgAnnlRtrPct 9.76% [3]
Class R6  
Prospectus [Line Items] oef_ProspectusLineItems  
Average Annual Return, Percent oef_AvgAnnlRtrPct 21.38%
Average Annual Return, Percent oef_AvgAnnlRtrPct 6.65%
Average Annual Return, Percent oef_AvgAnnlRtrPct 12.34%
Performance Inception Date oef_PerfInceptionDate Jul. 31, 2019
[1] “Other Expenses” are based on estimated amounts for the current fiscal year.
[2] The Fund’s investment adviser added the broad-based securities market index in accordance with regulatory disclosure requirements. The Fund continues to use the Russell 2500 Growth Index as an additional benchmark because the investment adviser believes it is more representative of the Fund’s investment universe than the broad-based securities market index. All index returns include the reinvestment of dividends and distributions net of withholding taxes, but do not reflect fees, brokerage commissions, or other expenses.
[3] Returns after taxes for Class I are provided because Class I shares represent the largest percentage of assets in the Calamos Family of Funds.