Pinnacle West Capital Corporation (Pinnacle West) is a holding company that conducts business through its subsidiaries. The Company’s business consists of traditional regulated retail and wholesale electricity businesses (primarily electric service to Native Load customers) and related activities, and includes electricity generation, transmission and distribution. It drives revenues and earnings from its wholly owned subsidiary, Arizona Public Service Company (APS). APS is an electric utility that provides either retail or wholesale electric service to the State of Arizona, with the major exceptions of about one-half of the Phoenix metropolitan area, the Tucson metropolitan area and Mohave County in northwestern Arizona. Pinnacle West’s other first-tier subsidiaries are SunCor, APSES and El Dorado. In August 2011, the Company acquired APS Energy Services Company, Inc. from Pinnacle West.