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