FirstEnergy Corp. is a holding company. The Company is a diversified energy company. The Company operates in three segments: regulated distribution, regulated transmission and competitive energy services segment. The Company’s Regulated Distribution segment distributes electricity through the Company's 10 utility operating companies, serving approximately six million customers within 65,000 square miles of Ohio, Pennsylvania, West Virginia, Maryland, New Jersey and New York. The Company’ s Regulated Transmission segment transmits electricity through transmission facilities owned and operated by ATSI, TrAIL, and certain of FirstEnergy's utilities (JCP&L, ME, PN, MP, PE and WP). The Company’s Competitive Energy Services segment, through FES and AE Supply, supplies electricity to end-use customers through retail and wholesale arrangements, including competitive retail sales to customers primarily in Ohio, Pennsylvania, Illinois, Michigan, New Jersey and Maryland.