144 0001244290 XXXXXXXX LIVE 0001015328 Wintrust Financial Corporation 001-35077 1719 Shore Acres Drive Lake Forest IL 60044 847-939-9000 Edward J. Wehmer Chairman Director Executive Officer Common Stock Wintrust Investments, LLC

231 S. LaSalle Street, 13th Floor Chicago IL 60604

9500 940500 108818 03/05/2024 NASDAQ Common Stock 02/26/2024 Purchase Wintrust Financial Corporation N 9990 02/26/2024 Cash Y 03/06/2024 Edward J. Wehmer