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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: Deliver 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  
        
        
Federal Energy Regulatory Commission (FERC) Compliance Postings
FERC regulates and oversees energy industries in the economic, environmental and safety interests of the American public. Ameren and other U.S. energy companies must comply with FERC rules requiring independent functioning between the provider's transmission function employees and its marketing function employees. More: Ameren FERC Compliance Postings
       
 
     
 
   
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