EXELON CORP

Exelon is a utility services holding company that operates in the energy transmission and distribution sectors through its subsidiaries: ComEd, PECO, BGE, Pepco, DPL, and ACE. ComEd focuses on the purchase and regulated retail sale of electricity, as well as the transmission and distribution of electricity to retail customers in Northern Illinois, including the City of Chicago. PECO engages in the purchase and regulated retail sale of electricity and natural gas, along with the transmission and distribution of electricity and distribution of natural gas to retail customers in Southeastern Pennsylvania, including the City of Philadelphia (electricity), and Pennsylvania counties surrounding the City of Philadelphia (natural gas). BGE handles the purchase and regulated retail sale of electricity and natural gas, and the transmission and distribution of electricity and distribution of natural gas to retail customers in Central Maryland, including the City of Baltimore (electricity and natural gas). Pepco Holdings LLC (PHI) is a utility services holding company that operates through its reportable segments: Pepco, DPL, and ACE. Potomac Electric Power Company (Pepco) provides for the purchase and regulated retail sale of electricity, and the transmission and distribution of electricity to retail customers in the District of Columbia and major portions of Montgomery and Prince George's Counties, Maryland. Delmarva Power & Light Company (DPL) is involved in the purchase and regulated retail sale of electricity and natural gas, and the transmission and distribution of electricity and distribution of natural gas to retail customers in portions of Delaware and Maryland (electricity), and portions of New Castle County, Delaware (natural gas). Atlantic City Electric Company (ACE) focuses on the purchase and regulated retail sale of electricity, and the transmission and distribution of electricity to retail customers in portions of Southern New Jersey. Exelon also provides support services to its subsidiaries at cost through its business services subsidiary, BSC, including legal, human resources, finance, information technology, and supply management services. PHI's business services subsidiary, PHISCO, offers support services at cost to PHI operating Registrants, such as legal, finance, engineering, customer operations, transmission and distribution planning, asset management, system operations, and power procurement.