Ameren (AEE)

=== SEC Form 4 — Statement of Changes in Beneficial Ownership === Document Type: 4 Period of Report: 2026-06-01 10b5-1 Pre-arranged Plan: No --- Issuer --- Name: AMEREN CORP (AEE) CIK: 0001002910 --- Reporting Owner --- Name: Arora Ajay K CIK: 0002093735 Role: Officer (EVP of Subsidiary) --- Non-Derivative Transactions --- [Transaction #1] Security: Common Stock, $.01 Par Value Date: 2026-06-01 | Code: A (Grant or award) Shares: +6,797 | Price: $0.00 Shares Owned After: 22,326 | Ownership: D (Direct) Footnotes: [F2] Award of performance-based restricted stock units pursuant to the issuer's 2022 Omnibus Incentive Compensation Plan (the "2022 Plan"). Amount reported represents the minimum number of shares that will be delivered upon satisfaction of vesting conditions. The performance-based restricted stock units are schedueld to vest upon the payment date, which shall be as soon as practicable following June 1, 2031, and no later than July 15, 2031, subject to the terms of the 2022 Plan and the applicable award agreement issued thereunder. [F3] Amount includes 2 shares acquired during the first quarter of 2026 through reinvested dividends, as well as 28 accrued dividend equivalents acquired during the first quarter of 2026 pursuant to a dividend reinvestment feature of restricted stock units granted under the issuer's 2022 Omnibus Incentive Compensation Plan. --- 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 May 29, 2026. [Holding #2] Security: Common Stock, $.01 Par Value Ownership: I (Indirect) --- 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 May 29, 2026. F2: Award of performance-based restricted stock units pursuant to the issuer's 2022 Omnibus Incentive Compensation Plan (the "2022 Plan"). Amount reported represents the minimum number of shares that will be delivered upon satisfaction of vesting conditions. The performance-based restricted stock units are schedueld to vest upon the payment date, which shall be as soon as practicable following June 1, 2031, and no later than July 15, 2031, subject to the terms of the 2022 Plan and the applicable award agreement issued thereunder. F3: Amount includes 2 shares acquired during the first quarter of 2026 through reinvested dividends, as well as 28 accrued dividend equivalents acquired during the first quarter of 2026 pursuant to a dividend reinvestment feature of restricted stock units granted under the issuer's 2022 Omnibus Incentive Compensation Plan. --- Signature --- /s/ Jonathan T. Shade, Deputy Corp. Secy. for Ameren Corporation, attorney-in-fact for Ajay K. Arora (2026-06-03)