Exelon Generation
Exelon, through its subsidiary Exelon Generation, owns and controls one of the largest generation portfolios in the country-around 33 gigawatts (GW) of low-cost owned and contracted generation. It is composed of a diverse mix of fossil, hydro, nuclear and renewable generation facilities. Exelon Generation is comprised of 3 business units – Exelon Power, Exelon Generation and Power Team.
Exelon Nuclear
Exelon Nuclear, headquartered in Warrenville, Illinois, operates the largest nuclear fleet in the nation and the third largest fleet in the world. Exelon’s 10 plants with 17 reactors represent approximately 20% of the U.S. nuclear industry’s power capacity, enough power to steadily supply millions of average U.S. homes. There are about 8,500 nuclear professionals working in Exelon Nuclear. Whether at the power plant or the headquarters, these professionals implement industry best practices to ensure safe, reliable operation throughout the fleet, which operates at world-class levels.
Exelon Nuclear Partners is the consulting arm of Exelon Nuclear that advises clients on operational and management model practices to improve nuclear plant operation. (Visit ExelonNuclearPartners.com)
- Urban Solar - As part of Exelon's investment in renewable energy, we built the first urban solar plant in Chicago.

Exelon Power
Exelon Power is responsible for managing, operating and maintaining the company’s fossil fuel (coal, oil, and natural gas), hydroelectric, wind and solar-powered fleet of generating assets located in Pennsylvania, Maryland, Illinois, Texas, Massachusetts, Oregon, Idaho, Kansas, Minnesota, Michigan, and Missouri. The engineers, operators and technicians of Exelon Power headquartered in Kennett Square, Pennsylvania, have made great strides in optimizing the performance of our units while safely providing the company with the right power, at the right time, with the right price. Exelon Power’s clean energy fleet is separated into three divisions within the business unit:
- Exelon Wind is responsible for 36 wind projects in eight states which are capable of producing 735 megawatts (MW) of clean electricity.
- Exelon Hydro is responsible for Exelon Power’s two hydroelectric generation facilities which are located in Pennsylvania and Maryland.
- Exelon Solar is responsible for the nation’s largest urban solar plant, Exelon City Solar, which is located in Chicago.
Exelon Power Team
Exelon Power Team is the power marketing division of Exelon, with headquarters and a trading floor in Kennett Square, Pennsylvania. Its role is to manage the risk and maximize the economic value associated with Exelon’s electric generating facilities, power purchase agreements, fuel requirements, emission credits, transmission contracts and load obligations. Our experienced transactors come from diverse industry and educational backgrounds and are supported by a wide spectrum of staff expertise – finance, risk, credit, structuring, engineering, development, environmental, legal and weather and load forecasting. Our team is committed to exemplary ethical standards.
Exelon Energy is the retail marketing arm of Power Team that sells electricity and gas to commercial and industrial customers in deregulated areas.
Exelon Transmission Company
Exelon is leveraging our transmission expertise and created Exelon Transmission Company in 2009. This is a tremendous market opportunity as the U.S. is expected to invest $60-$100 billion in transmission over the next 10 years.
- ComEd and its employees are proud to have received the National Arbor Day Foundation® Tree Line USA Award for our environmentally responsible tree care, worker training, tree planting and public education programs.

ComEd
Based in Chicago, Commonwealth Edison (ComEd) is a subsidiary of Exelon Corporation and provides electricity to 3.8 million customers across northern Illinois. (Visit ComEd.com)
Quick Facts:
- Service Area: 11,300 square miles
- Customers: 3.8 million electric
- Employees: Nearly 6,000
- 2010 Revenues: $6,204 million
- 2010 Assets: $21,652 million
- Substations: 1,300
- Distribution & Transmission Power Lines: more than 70,000 miles
- PA Horticulture Society picks PECO for community greening award: Each year, PECO takes on projects to restore native plant species on our rights of way and improve biodiversity to attract wildlife.

PECO
Based in Philadelphia, PECO is an electric and natural gas utility subsidiary of Exelon that serves customers in southeastern Pennsylvania. (Visit PECO.com)
Quick Facts:
- Service Area: 2,100 square miles
- Customers: 1.6 million electric; 490,000 natural gas
- Employees: 2,400
- 2010 Revenues: $5,519 million
- 2010 Assets: $8,985 million
- Substations: 450
- Distribution and Transmission Lines: more than 29,000 miles
Exelon Business Services Company
Exelon Business Services Company (BSC) has approximately 1,700 employees in northern Illinois, Pennsylvania and at virtually every Exelon business location, delivering value by providing cost and organizational efficiencies, high-quality service and developing enterprise-wide and organization-specific solutions. From legal and financial services to communications and information technology, BSC’s professional staff serves as a strategic partner to provide quality products and services at the lowest cost for all Exelon companies.