June 22, 2026, as amended July 13, 2026
Summary Prospectus
Calamos Active Hedged Equity ETF
(Cboe BZX – CHDG)

Before you invest, you may want to review the Fund’s prospectus and statement of additional information, which contain more information about the Fund and its risks. You can find the Fund’s prospectus, statement of additional information, reports to shareholders and other information about the Fund online at www.calamos.com/resources. You can also get this information at no cost by calling 866.363.9219 or by sending an e-mail request to prospectus@calamos.com. The current prospectus and statement of additional information dated November 28, 2025 (and as each may be amended or supplemented), and the independent registered public accounting firm’s report and financial statements included in the Fund’s Form N-CSR, dated July 31, 2025, are incorporated by reference into this summary prospectus.
Investment Objective
Calamos Active Hedged Equity ETF (the “Fund”) seeks total return with lower volatility than equity markets.
Fees and Expenses of the Fund
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.
Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment):
Management Fees | 0.64 | % | |
Distribution and/or Service Fees (12b‑1) | 0.00 | % | |
Other Expenses1 | 0.00 | % | |
Acquired Fund Fees and Expenses2 | 0.02 | % | |
Total Annual Operating Expenses | 0.66 | % |
Example
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:
You would pay the following expenses whether you sell or hold your Fund Shares at the end of the period:
| One Year |
| Three Years |
|
| $67 |
| $211 |
|
Portfolio Turnover
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. Because the Fund has not yet commenced operations, portfolio turnover information is unavailable at this time.
Principal Investment Strategies
The Fund seeks to achieve total return with lower volatility than equity markets. Under normal circumstances, the Fund invests at least 80% of its net assets (plus any borrowings for investment purposes) in shares of other registered investment companies which in turn seek to provide investment results that, before expenses, correspond generally to the price and yield performance of the S&P 500® Index (the “S&P 500”), including, but not limited to, the State Street® SPDR® Portfolio S&P 500® ETF (“SPYM”), the State Street SPDR® S&P 500 ETF Trust (“SPY”) or the Vanguard S&P 500 ETF (“VOO”) (collectively, the ”S&P 500® Funds”). The Fund invests in the S&P 500® Funds while also buying and selling index call and put options and/or entering into other options strategies, including the use of Flexible Exchange Options (“FLEX Options”) on the S&P 500® Funds and/or broad based indices (such as the S&P 500 or MSCI EAFE Index) or ETFs (exchange-traded funds).
Calamos Active Hedged Equity ETF
In addition, to seek to offset some of the risk of a potential decline in value of certain long positions, the Fund may also purchase put options on the S&P 500® Funds or broad-based securities indices (such as the S&P 500). The Fund may also engage in active and frequent trading of portfolio securities.
Equity securities purchased by the Fund may also include U.S. exchange-listed common stocks, options on equities, and American Depositary Receipts (ADRs). The Fund may also invest in fixed-income securities. The Fund may also invest in ETFs.
The Fund may use derivatives for hedging (attempting to reduce risk by offsetting one investment position with another) or non-hedging purposes. In particular, the Fund may hedge some or all of the currency exposure of foreign securities by entering into forward foreign currency contracts, futures or other derivatives.
The Fund intends that its option-based risk management strategy will reduce the volatility inherent in investments in equity securities over time.
General Information about FLEX Options
FLEX Options are customizable exchange-traded option contracts guaranteed for settlement by the Options Clearing Corporation (the “OCC”). The OCC guarantees performance by each of the counterparties to the FLEX Options, becoming the “buyer for every seller and the seller for every buyer,” with the goal of protecting clearing members and options traders from counterparty risk. The OCC may make adjustments to FLEX Options for certain significant events, as more fully described in the Fund’s Statement of Additional Information. Although guaranteed for settlement by the OCC, FLEX Options are still subject to counterparty risk with the OCC and subject to the risk that the OCC may fail to perform the settlement of the FLEX Options due to bankruptcy or other adverse reasons. The FLEX Options that the Fund will hold and that reference the State Street SPDR S&P 500 ETF (“SPY”) will give the Fund the right or the obligation to either receive or deliver shares of SPY, or the right or the obligation to either receive or deliver a cash payment on the option expiration date based upon the difference between SPY’s value and a strike price, depending on whether the option is a put or call option and whether the Fund purchases or sells the option. The Fund will purchase call options (giving the Fund the right to receive shares of SPY or a cash payment) and put options (giving the Fund the right to deliver shares of SPY or a cash payment), and may sell (i.e., write) call options (giving the Fund the obligation to deliver shares of SPY or a cash payment) and put options (giving the Fund the obligation to receive shares of SPY or a cash payment) in instances where it is deemed necessary or desirable to construct the Box Spread. In instances where the purchased call and put options are substantially in-the-money and the synthetic long and short positions comprising the Box Spread can effectively be constructed without writing call or put options, the Fund may elect not to write call or put options. The Fund intends to use FLEX Options in constructing Box Spreads. The Fund receives premiums in exchange for the written FLEX Options and pays premiums in exchange for the purchased FLEX Options. The OCC and securities exchanges on which the FLEX Options are listed do not charge ongoing fees to writers or purchasers of the FLEX Options during their life for continuing to hold the option contracts but may charge transaction fees.
Principal Risks
An investment in the Fund is subject to risks, and you could lose money on your investment in the Fund. There can be no assurance that the Fund will achieve its investment objective. You should not consider investing in the Fund if your investment objective differs from the Fund’s investment objective or if you are not willing to accept the principal risks associated with an investment in the Fund. The risks associated with an investment in the Fund can increase during times of significant market volatility. 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. The principal risks are presented in alphabetical order to facilitate finding particular risks and comparing them with other funds. Each risk summarized below is considered a “principal risk” of investing in the Fund, regardless of the order in which it appears. The principal risks of investing in the Fund include:
• | 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. |
• | 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. |
• | 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. |
• | Correlation Risk — The effectiveness of the Fund’s index option-based risk management strategy may be reduced if the performance of the Fund’s equity portfolio does not correlate to that of the indices underlying its option positions. |
2
Calamos Active Hedged Equity ETF
3
Calamos Active Hedged Equity ETF
options, non-customized options or other securities. The Fund also is subject to the risk that the OCC will become insolvent or otherwise be unable to meet its obligations, which could cause the Fund to suffer losses which may be significant.
4
Calamos Active Hedged Equity ETF
addition to the direct expenses incurred by the Fund. In the event the Fund invests in another affiliated fund (the “Acquired Fund”), the portion of the Fund’s Investment Management Fee equal to the advisory fee payable to the Acquired Fund (based on average daily net assets invested) is waived.
Fund Performance
The Fund has not commenced operations as of the date of this prospectus. Once available, the Fund’s performance information, and information that gives some indication of the risks of an investment in the Fund by comparing the Fund’s performance with a broad measure of market performance, will be available at no cost by visiting the Fund’s website at www.calamos.com. Past performance (before and after taxes) is not an indication of future performance.
Investment Adviser
Calamos Advisors LLC (“Calamos Advisors” or the “Adviser”)
Portfolio Managers
PORTFOLIO MANAGER/FUND TITLE (IF APPLICABLE) | PORTFOLIO MANAGER EXPERIENCE IN THE FUND | PRIMARY TITLE WITH INVESTMENT ADVISER | |
Jason Hill | Since inception | SVP, Sr. Co-Portfolio Manager | |
David O’Donohue | Since inception | SVP, Sr. Co-Portfolio Manager | |
Eli Pars | Since inception | SVP, Sr. Co-Portfolio Manager | |
Jimmy Young | Since inception | SVP, Co-Portfolio Manager | |
Anthony Vecchiolla | Since inception | SVP, Co-Portfolio Manager |
5
Calamos Active Hedged Equity ETF
Other Important Information Regarding Fund Shares
Portfolio Holdings. The Fund’s portfolio holdings will be disclosed on its website daily after the close of trading on the Exchange and prior to the opening of trading on the Exchange the following day. A description of the Fund’s policies and procedures with respect to the disclosure of the Fund’s portfolio holdings is available in the Fund’s Statement of Additional Information (“SAI”).
Premium/Discount Information. Information about the premiums and discounts at which the Fund’s Shares have traded will be available at www.calamos.com.
Purchase and Sale of Fund Shares
The Fund will issue (or redeem) Fund Shares to certain institutional investors (typically market makers or other broker-dealers) only in large blocks of Fund Shares known as “Creation Units.” Creation Unit transactions are conducted in exchange for the deposit or delivery of a designated portfolio of in-kind securities and/or cash.
Individual Fund Shares may only be purchased and sold on the Exchange, other national securities exchanges, electronic crossing networks and other alternative trading systems through your broker-dealer at market prices. Because Fund Shares trade at market prices rather than at net asset value (“NAV”), Fund Shares may trade at a price greater than NAV (premium) or less than NAV (discount). When buying or selling Fund Shares in the secondary market, you may incur costs attributable to the difference between the highest price a buyer is willing to pay to purchase Fund Shares (bid) and the lowest price a seller is willing to accept for Fund Shares (ask) (the “bid-ask spread”). Recent information regarding the Fund’s NAV, market price, premiums and discounts, and bid-ask spreads is available at https://www.calamos.com/.
Tax Information
Net investment income and capital gains distributions you receive from the Fund generally are subject to federal income taxes and may also be subject to state and local taxes. The Fund intends to make distributions annually and distribute long-term capital gains, if any, at least annually.
Payments to Broker-Dealers and Other Financial Intermediaries
If you purchase shares of the Fund through a broker-dealer or other financial intermediary (such as a bank), the Fund and its related companies may pay the intermediary for the sale of Fund Shares and related services. These payments may create a conflict of interest by influencing the broker-dealer or other intermediary and your salesperson to recommend the Fund over another investment. Ask your salesperson or visit your financial intermediary’s website for more information.
You can find the Fund’s statutory prospectus and statement of additional information online at https://www.calamos.com/resources/.
Calamos Active Hedged Equity ETF
2020 Calamos Court
Naperville, IL 60563-2787
866.363.9219
www.calamos.com
811-22887
CHDGSUMPRO 071326
6