0001002910 2026-05-14 2026-05-14 0001002910 1 2026-05-14 2026-05-14 iso4217:USD shares S-3 S-3ASR EX-FILING FEES 0001002910 AMEREN CORP N/A N/A S-3 AMEREN CORP Equity Common Stock, $.01 par value true 1894702 135016464.52 S-3 333-272053 2023-05-18 9401.55 135016464.52 0.00 0.00 0.00 0.00 Pursuant to Rule 416(a) under the Securities Act of 1933, as amended (the "Securities Act"), this registration statement also covers such additional securities as may become deliverable as a result of stock splits, stock dividends, split-ups, recapitalizations or similar transactions, in accordance with the provisions of the DRPlus Dividend Reinvestment and Stock Purchase Plan. Pursuant to Rule 415(a)(6) under the Securities Act, 1,894,702 shares of Ameren Corporation's common stock registered hereunder are unsold securities previously registered on Registration Statement No. 333-272053 filed on May 18, 2023 (the "Prior Registration Statement"). Pursuant to Rule 415(a)(6) under the Securities Act, the $9,401.55 filing fee previously paid in connection with such unsold securities will continue to be applied to such unsold securities. Pursuant to Rule 415(a)(6) under the Securities Act of 1933, the offering of unsold securities under the Prior Registration Statement will be deemed terminated as of the date of effectiveness of this registration statement.