Calamos ETF Trust

09/29/2025 | Press release | Distributed by Public on 09/29/2025 11:59

Prospectus by Investment Company (Form 497)

SUPPLEMENT DATED SEPTEMBER 29, 2025

CALAMOS ETF TRUST (the "Trust")

IMPORTANT NOTICE REGARDING CHANGE IN INVESTMENT POLICY

This notice contains important information for shareholders about matters affecting each of the funds listed below each of which is a series of the Trust (each, a "Fund" and collectively the "Funds") and each Fund's prospectuses dated as indicated below.

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Fund

Prospectus Date

1

Calamos Bitcoin Structured Alt Protection ETF - January

January 21, 2025

2

Calamos Bitcoin 90 Series Structured Alt Protection ETF - January

February 3, 2025

3

Calamos Bitcoin 80 Series Structured Alt Protection ETF - January

February 3, 2025

4

Calamos Bitcoin Structured Alt Protection ETF - April

April 1, 2025

5

Calamos Bitcoin 90 Series Structured Alt Protection ETF - April

April 1, 2025

6

Calamos Bitcoin 80 Series Structured Alt Protection ETF - April

April 1, 2025

7

Calamos Bitcoin Structured Alt Protection ETF - July

July 8, 2025

8

Calamos Bitcoin 90 Series Structured Alt Protection ETF - July

July 8, 2025

9

Calamos Bitcoin 80 Series Structured Alt Protection ETF - July

July 8, 2025

10

Calamos Bitcoin Structured Alt Protection ETF - October

October 1, 2025

11

Calamos Bitcoin 90 Series Structured Alt Protection ETF - October

October 1, 2025

12

Calamos Bitcoin 80 Series Structured Alt Protection ETF - October

October 1, 2025

13

Calamos Bitcoin Structured Alt Protection ETF - 6Mo Jan/Jul

February 3, 2025

14

Calamos Bitcoin Structured Alt Protection ETF - 6Mo Apr/Oct

April 1, 2025

On September 24, 2025, the Trust's Board of Trustees approved, at the request of the Funds' investment adviser, Calamos Advisors LLC (the "Advisor"), certain changes to each Fund's principal investment strategies.

In order to provide greater flexibility to manage the unencumbered cash of each Fund and to invest in income-generating assets over and above U.S. Treasury securities, the Advisor seeks to add the use of offsetting sets of options (referred to as "box spreads") to each Fund's principal investment strategies. The Advisor anticipates that the Funds will use FLEX Options for this purpose. FLEX Options are customizable exchange-traded option contracts guaranteed for settlement by the Options Clearing Corporation (the "OCC").

In connection with these changes, the current investment policy by which each of the Funds, under normal market conditions, seeks to invest at least 80% of its net assets (plus borrowings for investment purposes, if any) in investments that provide exposure to Spot bitcoin will be revised to reflect each Fund's ability to engage in box spread trades. Pursuant to the amended policy, each Fund, under normal market conditions, will seek to invest at least 80% of its net assets in investments that provide exposure to Spot Bitcoin, and these investments may include investments in box spreads.

These changes are anticipated to be effective on or about November 28, 2025 and will be reflected in each Fund's prospectus at such time.


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Calamos ETF Trust published this content on September 29, 2025, and is solely responsible for the information contained herein. Distributed via SEC EDGAR on September 29, 2025 at 17:59 UTC. If you believe the information included in the content is inaccurate or outdated and requires editing or removal, please contact us at [email protected]