ITEM 5.02 Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers.

On May 13, 2022, Richard J. Mark, Chairman and President of Ameren Illinois Company, a subsidiary of Ameren Corporation (the "Company"), notified the Company that he intends to retire from the Company and its affiliated entities effective August 1, 2022. Mr. Mark has agreed to work closely with the Company to facilitate an orderly transition for his successor, including through an extension of his retirement date, if needed.


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