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Our Businesses

St. Louis-based Ameren Corporation (NYSE: AEE), among the nation's largest investor-owned electric and gas utilities, serves 2.4 million electric and nearly one million natural gas customers throughout its 64,000-square-mile area of Illinois and Missouri. In addition to owning more than 16,400 megawatts of generating capacity, the company also operates non rate-regulated generation, development, marketing and fuels services companies. More about our businesses: Ameren Fact Sheet and Ameren Organizational Structure.
  

Ameren Services: Provides shared services for all of Ameren Corporation

Ameren Services  
    AmerenEnergy Fuels & Services  
       
Ameren Illinois Utilities: Delivers electric and natural gas services in Illinois
Ameren Illinois Utilities  
    AmerenCILCO  
    AmerenCIPS  
    AmerenIP  
       
AmerenEnergy Resources: Non rate-regulated businesses

AmerenEnergy Resources  
    Ameren Energy Marketing  
    AmerenEnergy Generating  
       
AmerenUE: Operates power plants and provides gas and electric services in Missouri

AmerenUE  
    AmerenUE Asset Management & Trading  
       
       
 
     
 
   
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