PNW

Pinnacle West Capital Corp

A Phoenix-based holding company that owns Arizona Public Service (APS), the largest electric utility in Arizona, which keeps the lights on for homes and businesses across the state. Its roots reach back to 1886, when the Phoenix Light and Fuel Company began powering the young desert town; the firm was renamed Pinnacle West Capital in 1987, having started life as AZP Group — a name chosen during a push to diversify beyond just powering the desert.