Public Service Enterprise Group, Inc. is an energy company, which engages in the business of regulated electric and gas utility, and nuclear generation. Its products and services include energy, capacity, ancillary services, and emissions allowances and congestion credits. The firm operates through the Public Service Electric and Gas Company (PSE&G) and PSEG Power segments. The PSE&G segment focuses on the transmission of electricity and distribution of electricity and natural gas. The PSEG Power segment wholesales energy, fuel supply, and energy transacting functions. The company was founded in 1903 and is headquartered in Newark, NJ.