Ameren Corp

ameren.com

Ameren Corp (NYSE: AEE) is a regulated electric and natural gas utility company that generates, transmits, and distributes energy to customers across Missouri and Illinois. It earns revenue by charging rates approved by state and federal regulators for electricity and natural gas delivery services. The company operates through two principal regulated subsidiaries: Union Electric Company (doing business as Ameren Missouri) and Ameren Illinois Company, both wholly owned as of January 30, 2026. As a rate-regulated utility, revenue is largely determined by approved tariffs rather than market pricing, providing predictable cash flows tied to the rate base and customer usage volumes. The business is capital-intensive by structure, with significant investment in generation, transmission, and distribution infrastructure. Ameren Corp files its combined annual reports alongside Union Electric Company and Ameren Illinois Company, each as a separate SEC registrant. The company's common stock trades on the New York Stock Exchange under the ticker AEE.