Ameren Illinois, a subsidiary of Ameren Corporation, announced the sale of $350 million in 5.625% First Mortgage Bonds due 2055. The bonds were issued under a previously filed registration statement and prospectus, with net proceeds of approximately $346.9 million before expenses. The company filed the Form 8-K to report documents related to the offering, including underwriting and legal opinions. The filing was signed by Michael L. Moehn, Senior Executive Vice President and CFO of Ameren Corporation, and Leonard P. Singh, Chairman and President of Ameren Illinois, on March 3, 2025.