Pinnacle West Capital Corporation (PNW), primarily operating through its Arizona Public Service Company (APS) subsidiary, delivers retail and wholesale electricity services predominantly within Arizona. The company manages the full scope of electricity provision, encompassing generation, transmission, and distribution, leveraging a diverse energy portfolio that includes coal, nuclear, natural gas, oil, and solar power facilities. Its robust infrastructure for power delivery features approximately 5,814 pole miles of overhead transmission lines and roughly 74 miles of subterranean transmission lines. For distribution, the company maintains about 11,258 miles of overhead lines and an estimated 22,821 miles of underground primary cabling. This network is further supported by 475 owned and managed transmission and distribution substations. PNW possesses or leases roughly 6,323 megawatts of regulated power generation capacity and supplies electricity to an estimated 1.3 million customers. Established in 1985, Pinnacle West Capital Corporation's corporate headquarters are situated in Phoenix, Arizona.