Public Service Enterprise Group, Inc. is a holding company, which engages in the provision of electric and gas services. The firm operates through the following two segments: Public Service Electric & Gas Co. (PSE&G) and PSEG Power. The PSE&G segment engages in the transmission of electricity and distribution of electricity and natural gas. The PSEG Power segment wholesales energy, fuel supply, and energy transacting functions. Its products and services include energy, capacity, ancillary services, and emissions allowances and congestion credits. The company was founded in 1903 and is headquartered in Newark, NJ.