Exelon Corporation is an American Fortune 100 energy company headquartered in Chicago, Illinois and incorporated in Pennsylvania.

Exelon was created in October 2000 by the merger of PECO Energy Company of Philadelphia and Unicom Corp of Chicago, which owned Commonwealth Edison. Exelon operates regulated utilities in Illinois, Pennsylvania, Maryland, Delaware, New Jersey, and Washington, DC. In October 2009, Exelon had full or majority ownership of 23 nuclear reactors in 14 nuclear power plants.

Exelon consists of eight main operating subsidiaries with Exelon Generation, a deregulated energy generator, Constellation Energy Group, a deregulated competitive energy supplier, and six regulated utilities, Commonwealth Edison (Illinois), PECO Energy Company (Pennsylvania), Baltimore Gas and Electric (Maryland), Delmarva Power & Light (Delaware and Maryland), Atlantic City Electric (New Jersey), and Potomac Electric Power Company (Washington, DC and Maryland).

Exelon Corporation operates in 48 states, the District of Columbia and Canada. Exelon Generation has approximately 24.5 gigawatts of owned capacity (as of June 2020). Constellation 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 more than 6.6 million customers in central Maryland, northern Illinois and southeastern Pennsylvania.

According to Statista.com; companieshistory.com; en.wikipedia. Source of photos: internet