Corporate Structure A general overview of the Ameren segmented reporting structure.
Ameren Corporation (NYSE: AEE) St. Louis-based Ameren Corporation (NYSE: AEE) serving 2.4 million electric customers and nearly one million natural gas customers in a 64,000-square-mile area of Missouri and Illinois.
Missouri Regulated Utilities
	AmerenUE
		AmerenUE Asset Management & Trading
Illinois Regulated Utilities
	AmerenCILCO
	AmerenCIPS
	AmerenIP
Non Rate-Regulated Generation
	AmerenEnergy Resources
		AmerenEnergy Generating
		Ameren Energy Marketing
	AmerenEnergy Resources Generating
	Electric Energy, Inc.
Support Services
	Ameren Services
	AmerenEnergy Fuels & Services