X0508 4 2025-11-14 0 0001002910 AMEREN CORP AEE 0002094778 Smith Patrick E 1901 CHOUTEAU AVENUE SAINT LOUIS MO 63103 0 1 0 0 SVP of Subsidiary 0 Common Stock, $.01 Par Value 3018 I By 401(k) Common Stock, $.01 Par Value 683 I By spouse Common Stock, $.01 Par Value 2025-11-14 4 S 0 2404 104.80 D 15077 D Common Stock, $.01 Par Value 2025-11-14 4 G 0 120 0 D 14957 D Represents the estimated number of share equivalents held by the reporting person in the unitized stock fund included in the Ameren Corporation Savings Investment Plan as of October 31, 2025. This price is a weighted average price. These shares were sold in multiple transactions at prices ranging from $104.78 to $104.82, inclusive. The reporting person undertakes to provide Ameren Corporation (Ameren), any security holder of Ameren, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within such range. Jonathan T. Shade, Deputy Corp. Secy. for Ameren Corporation, attorney-in-fact for Patrick E. Smith 2025-11-18