The information in this preliminary pricing supplement is not complete and may be changed. We may not sell these Notes until the pricing supplement, the accompanying product supplement, the accompanying index supplement and the accompanying prospectus (collectively, the “Offering Documents”) are delivered in final form. The Offering Documents are not an offer to sell these Notes and we are not soliciting... (continue reading...)
Rule 497(e)
File No. 333-191151
CALAMOS ETF TRUST
(the “Trust”)
Calamos S&P 500® Structured Alt Protection ETF® – November
(the “Fund”)
Supplement dated October 16, 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 have... (continue reading...)
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