Ameren CORP Form 4 insider transactions

Ameren's SVP Finance, Ryan J. Martin, increased his direct beneficial ownership of common stock through PSU vesting and received a new RSU grant.

Ajay K. Arora, SVP of a subsidiary of Ameren Corp, increased his beneficial ownership through a restricted stock unit grant and the vesting of performance share units.

Mark C. Lindgren, EVP & Chief HR Officer of a subsidiary, increased his beneficial ownership in Ameren Corp through restricted stock units and performance share unit vesting.

Ameren's Chairman, President, and CEO Martin J. Lyons reported the acquisition of 68,010 shares through restricted stock unit grants and performance share unit vesting, alongside an update to 401(k) holdings.

Ameren Corporation's SVP of a subsidiary, Eric V. Seidler, increased his beneficial ownership through the vesting of restricted stock units and performance share units.

Theresa A. Shaw, Ameren's SVP and CATO, reported the acquisition of restricted stock units and shares from vested performance units, increasing her beneficial ownership.

Ameren's EVP, GC & Secretary, David M. Feinberg, acquired 4,449 shares of common stock through a dividend reinvestment feature of restricted stock units.

Ameren Group President, Utilities, Michael L. Moehn, sold 6,500 shares of common stock for $103.6 per share as part of a pre-arranged trading plan.

Ameren Director Jamie L. Engstrom acquired 1,686 shares of common stock as director compensation.

Ameren Director Steven H. Lipstein acquired 1,686 shares of common stock as compensation, increasing his total beneficial ownership to 37,862 shares, under a pre-planned transaction.

Ameren Corporation Director Catherine S. Brune acquired 1,686 shares of common stock as part of her compensation, increasing her total beneficial ownership to 27,078 shares.

Ameren Corp. Director Leo S. Mackay Jr. acquired 1,686 shares of common stock as compensation, increasing his total beneficial ownership to 11,834 shares.

Ameren Director Craig S. Ivey acquired 1,686 shares of common stock as director compensation, increasing his total beneficial ownership to 16,597 shares.

Ameren Corporation Director Rafael Flores acquired 1,686 shares of common stock as compensation, increasing his total beneficial ownership to 15,553 shares.

Ameren Corp. Director Ward H. Dickson acquired 1,686 shares of common stock as compensation, increasing his total beneficial ownership to 18,946 shares.

Ameren Director Ellen M. Fitzsimmons acquired 1,686 shares of common stock as director compensation, increasing her total beneficial ownership to 53,026 shares.

Ameren Director Cynthia J. Brinkley acquired 1,686 shares of common stock as compensation, increasing her direct beneficial ownership to 13,494 shares.

Ameren Corporation's Director, Richard J. Harshman, acquired 1,686 shares of common stock as compensation, increasing his direct beneficial ownership to 22,135 shares.

Ameren Corp. Director Rafael Flores filed an amended Form 4 to correct details of a November 2025 common stock sale.

Ameren Corporation Director Steven O. Vondran acquired 1,686 shares of common stock as compensation, increasing his direct beneficial ownership to 3,597 shares.

Shawn E. Schukar, Chairman and President of an Ameren subsidiary, reported gifting 511 shares of Ameren common stock on December 12, 2025.

Ameren Corp. Director Steven H. Lipstein reported a planned future gift of 2,300 shares of common stock, scheduled for November 26, 2025, under a 10b5-1 plan.

Ameren Director Rafael Flores reported the sale of 225 shares of common stock at $105.21 per share, effective November 17, 2025, under a pre-arranged plan.

Ameren Corporation's SVP of Subsidiary, Patrick E. Smith, reported the sale of 2,404 shares and a gift of 120 shares of common stock.

Theresa A. Shaw, SVP of Finance and CAO at Ameren Corp, reported the sale of common stock and an acquisition through a 401(k) plan, all under a pre-arranged 10b5-1 plan.

Ameren Director Richard J. Harshman sold 2,500 shares of common stock at $104.9 per share, reducing his beneficial ownership to 20,378 shares.

Ameren's EVP, General Counsel, and Secretary, David M. Feinberg, is scheduled to receive 3,784 restricted stock units in November 2025.

Ameren's Senior Executive VP & CFO, Michael L. Moehn, reported the sale of 6,500 shares of common stock for approximately $659,360.

Ameren's Senior Vice President of Finance and Chief Accounting Officer, Theresa A. Shaw, was granted 2,411 restricted stock units.

An Ameren Corporation executive, Mark C. Lindgren, reported the sale of 3,500 shares of common stock at $100.89 per share.