SECURITIES AND EXCHANGE COMMISSION
Washington, DC 20549
FORM 12b-25
NOTIFICATION OF LATE FILING
Commission File Number 000-56082
(Check One):◻ Form 10-K ◻ Form 20-F ◻ Form 11-K ⌧ Form10-Q ◻ Form 10-D ◻ Form N-CEN ◻ Form N-CSR
For Period Ended:June 30, 2026
◻Transition Report on Form 10-K
◻Transition Report on Form 20-F
◻Transition Report on Form 11-K
◻Transition Report on Form 10-Q
For the Transition Period Ended:
Nothing in this form shall... (continue reading...)
http://archive.fast-edgar.com/20260817/AWZ2L22CZZ22J2N2229Q2MZ2RC8LU72SA282
Filed on: August 17, 2026
Rule 497(e)
File No. 333-191151
CALAMOS ETF TRUST
(the “Trust”)
Calamos S&P 500® Structured Alt Protection ETF® – September
(the “Fund”)
Supplement dated August 17, 2026
to the Fund’s Prospectus dated November 28, 2025, as amended
This supplement updates certain information contained in the Fund’s prospectus and should be attached to the prospectus and retained for future reference.
Capitalized terms not defined herein... (continue reading...)
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