St. Louis-based Ameren Corp. is a public utility that serves 2.4 million electric customers and 900,000 natural gas customers through its Ameren Missouri and Ameren Illinois regulated subsidiaries. Customers are located in central and eastern Missouri and southern Illinois. Ameren Missouri provides vertically integrated electric service, with a generating capacity of 10,800 megawatts. Ameren Illinois provides electric transmission service as well as natural gas delivery. Ameren Transmission Co. of Illinois develops regional electric transmission projects. AEE also operates one nuclear-generating facility. In 2023, electricity accounted for about 83% of total revenues. Management is committed to electric and gas service expansion and infrastructure improvements in the company's regulated service territories. Ameren has exited the volatile non-regulated merchant energy business, and has shown little interest in acquiring non-regulated assets. The company operates several nuclear generators, but still relies heavily on coal. Management estimates that about 14% of revenues ca