Exelon Energy, a subsidiary of Exelon Corporation, is backed by one of the cleanest and lowest-cost generation fleets in the country. Exelon Corporation is one of the nation's largest energy companies with 2011 annual revenues of nearly $33 billion. Exelon Generation is the No. 1 U.S. competitive power generator. Exelon’s regulated subsidiaries, BGE, ComEd and PECO, provide electric distribution service to customers in central Maryland, northern Illinois and southeastern Pennsylvania respectively. BGE and PECO also provide natural gas distribution service to customers in these areas.
Exelon Energy is integrating with Constellation, one of the largest competitive energy retail suppliers in the country.