Public Service Enterprise Group is the holding company for a regulated utility (PSE&G), a merchant power generation owner (PSEG Power), and an energy investment firm (PSEG Enterprise). PSE&G provides regulated gas and electricity delivery services in New Jersey to a combined 4 million customers. PSEG Power owns and operates merchant power plants in the Mid-Atlantic, New York, and the Northeast. Energy Holdings invests in energy-related assets worldwide. PSEG also operates the Long Island Power Authority system.