Pinnacle West CapitalIRS: 860512431
Pinnacle West is a holding company whose principal subsidiary is Arizona Public Service, a vertically integrated electric utility that serves 1.3 million customers across a 35,000-square-mile territory in central Arizona, including Phoenix. APS owns or leases more than 6 gigawatts of power generation capacity, including a 29% ownership stake in the largest nuclear plant in the U.S., Palo Verde. About half of the electricity that APS supplies to customers comes from clean energy sources, including nuclear.
1985 (38 years)
4 billion (2023)