Ameren Corporation

Ameren Corporation is a utility holding company that generates, transmits, and distributes electricity and natural gas to residential, commercial, industrial, and wholesale customers primarily in Missouri and Illinois. It operates through key segments including Ameren Missouri, which handles electric generation, transmission, and distribution; Ameren Illinois Electric Distribution; Ameren Illinois Natural Gas; and Ameren Transmission, focusing on high-voltage power lines. The company maintains rate-regulated networks serving millions of electric and natural gas customers across a 64,000-square-mile territory, emphasizing grid reliability, storm response, and infrastructure modernization to support growing demands such as large-load electric service agreements. Ameren Corporation plays a vital role in the Midwest energy market by delivering essential services, investing in generation diversity including nuclear and renewables, and contributing to regional economic activity through supplier purchases, taxes, and community support. Founded in 1902 and headquartered in St. Louis, Missouri, it remains a cornerstone of regulated utility operations.