Ameren said Mark C. Birk informed the company on October 2, 2025, effective on that date, of his decision to retire as Chairman and President of Ameren Missouri and from each other position he holds with the company's subsidiaries.

1. 01

   Ameren said Mark C. Birk informed the company on October 2, 2025, effective on that date, of his decision to retire as Chairman and President of Ameren Missouri and from each other position he holds with the company's subsidiaries.

2. 02

   The company said Michael L. Moehn, its Senior Executive Vice President and Chief Financial Officer, was elected as Interim Chairman and President of Ameren Missouri in addition to his current role, effective on October 2, 2025.

3. 03

   The company said Michael L. Moehn served as Chairman and President of Ameren Missouri from 2014 to 2019 and has served as the company's Chief Financial Officer since 2019.

4. 04

   The company said Birk's retirement covers his Ameren Missouri position and all of his positions with the company's subsidiaries, and Moehn will hold the interim position in addition to his existing Chief Financial Officer role.

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