 ST. LOUIS, June 9, 2021 PRNewswire -- Union Electric Company, doing business as Ameren Missouri, a subsidiary of Ameren Corporation NYSE: AEE, announced today the pricing of a public offering of 525 million aggregate principal amount of 2.15 first mortgage bonds due 2032 at 99.891 of their principal amount. The transaction is expected to close on June 22, 2021, subject to the satisfaction of customary closing conditions. 