Ameren
UtilitiesMissouri, United States5001-10000 Employees
Ameren Corporation, headquartered in St. Louis, Missouri, is a Fortune 500 utility company serving Illinois and Missouri. It operates through Ameren Illinois, which provides electric distribution and transmission services as well as natural gas distribution, and Ameren Missouri, which provides vertically integrated electric service and natural gas distribution. Ameren Missouri has generating capacity of more than 10,200 megawatts; combined, the company serves about 2.4 million electric customers and more than 900,000 natural gas customers across roughly 64,000 square miles. The company is the largest electric utility in Missouri and the second largest in Illinois, and ranks among the nation’s largest investor-owned electric or gas utilities. Ameren employs between 5,001 and 10,000 people and is located at 1901 Chouteau Avenue, St. Louis, Missouri 63103.