Pinnacle West Capital Corporation
UtilitiesArizona, United States51-200 Employees
Based in Phoenix, Pinnacle West Capital Corporation operates as a utilities holding company serving Arizona for more than 120 years. Its largest affiliate, Arizona Public Service, generates, sells, and delivers electricity and related services, serving more than a million customers across 11 of Arizona's 15 counties and co-owning the Palo Verde Nuclear Generating Station, a major electricity source in the Southwest. The group also includes SunCor Development Company, APS Energy Services, and El Dorado Investment Company, with consolidated assets around $11 billion. The company operates within the utilities sector, coordinating generation, transmission, and distribution through its affiliates. A notable 2023 development involved a collaboration with Ameresco to develop a microgrid system intended to provide backup power for the U.S. Army and California National Guard.