A Form 4 filed on August 17, 2026, reports that Theresa A. Shaw, Senior Vice President and CATO of Ameren Corporation (NYSE:AEE), sold 325 shares of common stock on August 14, 2026, under a Rule 10b5-1 trading plan.

Key Highlights

  • Sale transaction: Shaw disposed of 325 shares of Ameren common stock at $108.93 per share on August 14, 2026.
  • 10b5-1 plan: The filing indicates the transaction was made pursuant to a contract, instruction, or written plan intended to satisfy the affirmative defense conditions of Rule 10b5-1(c).
  • Post-transaction direct ownership: Shaw directly holds 32,340 shares following the reported transaction, including 47 accrued dividend equivalents acquired during the second quarter of 2026.
  • Indirect holdings: Shaw also holds an estimated 928 share equivalents indirectly through the Ameren Corporation Savings Investment Plan unitized stock fund, as of July 31, 2026.
  • Dividend equivalents: The 32,340 share total includes 47 accrued dividend equivalents from restricted stock units granted under the issuer's 2022 Omnibus Incentive Compensation Plan.

Shaw's August 2026 Share Sale and Ownership Position at Ameren

According to the filing, Theresa A. Shaw, identified as Senior Vice President and CATO of Ameren Corporation, sold 325 shares of Ameren common stock, $0.01 par value, on August 14, 2026, at a price of $108.93 per share. The filing discloses that the transaction was executed pursuant to a Rule 10b5-1(c) written plan, as indicated by the checked box on the form.

Following the sale, the filing reports that Shaw directly beneficially owns 32,340 shares. The filing notes that this figure includes 47 accrued dividend equivalents acquired during the second quarter of 2026 through a dividend reinvestment feature tied to restricted stock units granted under the issuer's 2022 Omnibus Incentive Compensation Plan. Separately, the filing lists an estimated 928 share equivalents held indirectly through the unitized stock fund within the Ameren Corporation Savings Investment Plan, measured as of July 31, 2026.

The Form 4 was signed by Jonathan T. Shade, Deputy Corporate Secretary of Ameren Corporation, as attorney-in-fact for Theresa A. Shaw, and was dated August 17, 2026.

What Was Disclosed

The filing discloses a sale of 325 shares of Ameren common stock by SVP and CATO Theresa A. Shaw at $108.93 per share on August 14, 2026, executed under a Rule 10b5-1 plan, with resulting direct beneficial ownership of 32,340 shares.