AEE Profile — Ameren Corp
Ameren is a public utility holding company. Through its subsidiary, Union Electric Company, doing business as Ameren Missouri, Co. operates a rate-regulated electric generation, transmission, and distribution business and a rate-regulated natural gas transmission and distribution business in Missouri. Through its subsidiary, Ameren Illinois Company, doing business as Ameren Illinois, Co. operates rate-regulated electric and natural gas transmission and distribution businesses in Illinois. Co. also has a subsidiary, Ameren Transmission Company of Illinois, that operates a Federal Energy Regulatory Commission rate-regulated electric transmission business.