AMEREN CORP (AEE) · Insider Trading (Form 4) SEC Filing

=== SEC Form 4 — Statement of Changes in Beneficial Ownership === Document Type: 4 Period of Report: 2026-03-04 10b5-1 Pre-arranged Plan: No --- Issuer --- Name: AMEREN CORP (AEE) CIK: 0001002910 --- Reporting Owner --- Name: Martin Ryan J CIK: 0002093849 Role: Officer (SVP Finance) --- Non-Derivative Transactions --- [Transaction #1] Security: Common Stock, $.01 Par Value Date: 2026-03-04 | Code: S (Open market sale) Shares: -1,300 | Price: $113.31 Total Value: $147,303.00 Shares Owned After: 26,479 | Ownership: D (Direct) --- Holdings --- [Holding #1] Security: Common Stock, $.01 Par Value Ownership: I (Indirect) Footnotes: [F1] 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 February 28, 2026. --- Footnotes (Complete Index) --- F1: 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 February 28, 2026. --- Signature --- /s/ Jonathan T. Shade, Deputy Corp. Secy. for Ameren Corporation, attorney-in-fact for Ryan J. Martin (2026-03-06)