Union Electric Company, also known as Ameren Missouri, has completed the issuance of $500,000,000 in aggregate principal amount of its 5.75% First Mortgage Bonds due 2056. The bonds were offered under a registration statement filed with the SEC and became effective on October 13, 2023. The company received net offering proceeds of approximately $492.2 million, after accounting for expenses. This issuance is part of a larger framework governed by the Indenture of Mortgage and Deed of Trust dated June 15, 1937, as amended. The new bonds are secured by a broad range of the company's properties, including power houses, plants, transmission and distribution systems, and related assets across Missouri, Illinois, and Iowa.