Ameren Subsidiaries
Ameren Services - provides shared administrative support services—everything from accounting to information technology—to Ameren and its operating companies, subsidiaries and affiliates.
	AmerenEnergy Fuels & Services - provides fuel and energy-related products and services for Ameren and its affiliated operating companies.
Ameren Illinois Utilities – delivers electric and natural gas services in Illinois.
	AmerenCILCO
	AmerenCIPS
	AmerenIP
AmerenEnergy Resources - an integrated energy commodity company focused on providing energy solutions to the Midwest market. Parent to two subsidiaries:
	Ameren Energy Marketing - the wholesale and retail marketing subsidiary. Sells energy in the wholesale and retail markets throughout the Midwest.
	AmerenEnergy Generating - a nonregulated generating subsidiary.
AmerenUE – operates power plants and provides gas and electric service in Missouri.
	AmerenUE Asset Management & Trading - an independent, national trading and marketing subsidiary.