FirstEnergy Corp., through its subsidiaries, generates, transmits, and distributes electricity in the United States. The company operates through Regulated Distribution and Regulated Transmission segments. It owns and operates coal-fired, nuclear, hydroelectric, natural gas, wind, and solar power generating facilities. The company also provides energy-related products and services to retail and wholesale customers.

It operates 24,506 circuit miles of overhead and underground transmission lines; and electric distribution systems, including 277,284 miles of overhead pole line and underground conduit carrying primary, secondary, and street lighting circuits, as well as owns substations with a total installed transformer capacity of approximately 164,611,989 kilovolt-amperes.The company serves approximately six million customers in Ohio, Pennsylvania, West Virginia, Maryland, New Jersey, and New York. FirstEnergy Corp. was founded in 1996 and is headquartered in Akron, Ohio.