Ameren Corporation announced that Warner Baxter, executive chairman of the board of directors, will retire from Ameren and its board of directors, effective November 2, 2023, after a 28-year career with the company. Marty Lyons, president and chief executive officer, has been elected by the board of directors to the additional role of chairman of the board, also effective November 2, 2023. Baxter joined Ameren in 1995.

During his career he served in numerous senior leadership roles, including chief financial officer of Ameren, president of Ameren Missouri, and was named chairman, president, and chief executive officer of Ameren in 2014. Baxter has also played an active leadership role in the industry. He is past chair of the Edison Electric Institute, where he played a key leadership role in advocating for transformational energy policies to support a responsible clean energy transition that will deliver significant benefits to customers and the country.

Baxter is the current chair of the Edison Foundation. He is also past chair of the Electric Power Research Institute. Baxter has played an active role in the community as well.

In 2020, he served as co-chair of the United Way of St. Louis campaign. In addition, Baxter was the founding chair of the American Cancer Society's (ACS) CEOs Against Cancer of Missouri and currently serves as the vice chair of ACS' Coaches vs.

Cancer Council. Baxter is also a member of the University of Missouri St. Louis Chancellor's Council and University of Missouri 100 Board of Directors.

Further, he was past chair of Civic Progress of St. Louis where he helped lead the integration of several civic organizations to form Greater St. Louis Inc., which is focused on inclusive economic development throughout the region.

He is a member of the board of directors of Greater St. Louis Inc., BJC Healthcare and U.S. Bancorp. Lyons has served as president and chief executive officer of Ameren since January 1, 2022.

Lyons joined Ameren in 2001. He has served in several senior leadership roles including chief financial officer, president of Ameren Services and president of Ameren Missouri prior to his current role. Under Baxter's leadership, Ameren has successfully executed a strategy focused on robust energy infrastructure investments supported by constructive energy policies driving strong value for Ameren's customers, communities, and shareholders.

Consistent with Ameren's vision of Leading the Way to a Sustainable Energy Future, Ameren has established a goal and is executing a plan to achieve net-zero carbon emissions by 2045 in a responsible fashion. In addition, during his tenure as executive chair and CEO, Ameren has been recognized as one of the top utilities in the nation for diversity and inclusion by Fair360 (formerly DiversityInc), including recently being named to its Hall of Fame. Under Baxter's leadership, Ameren has delivered total shareholder returns that are among the best in the industry since 2013.

After he leaves Ameren, Baxter plans to remain engaged in the industry, including through his work on the Edison Foundation. He will also remain actively engaged in the work of the American Cancer Society and several other community and philanthropic activities.