Exelon and Constellation completed their merger on March 12, 2012. We are now the largest competitive integrated energy provider in the United States.
Headquartered in Chicago, Exelon has operations and business activities in 47 states, the District of Columbia and Canada. The company is the largest competitive U.S. power generator, with approximately 35,000 megawatts of owned capacity comprising one of the nation’s cleanest and lowest-cost power generation fleets. Its Constellationbusiness unit provides energy products and services to approximately 100,000 business and public sector customers and approximately 1 million residential customers. Exelon’s utilities deliver electricity and natural gas to approximately 6.6 million customers in central Maryland (BGE), northern Illinois (ComEd) and southeastern Pennsylvania (PECO).