CALAMOS RUSSELL 2000 STRUCTURED ALT PROTECTION ETF - OCTOBER

Calamos Russell 2000®​ Structured Alt Protection ETF​ — October (the "Fund") seeks to provide investment results that, before taking fees and expenses into account, match the positive price return of the iShares®​Russell2000®​ ETF ("Underlying ETF") up to a cap of 8.45% (the "Cap"), while protecting against 100% of negative price return of the Underlying ETF (before fees and expenses), for the period from October 1, 2024 through September 30, 2025.