On February 19, 2020, the Board of Directors of Pinnacle West Capital Corporation expanded the number of Directors on the Pinnacle West Board of Directors by one and elected Ms. Glynis A. Bryan as a Director. Ms. Bryan’s initial term will extend until the Pinnacle West 2020 Annual Meeting of Shareholders on May 20, 2020. The Board of Directors of Arizona Public Service Company, the principal subsidiary of Pinnacle West, also elected Ms. Bryan to the APS Board of Directors. Ms. Bryan has been appointed to the Audit Committee and the Nuclear and Operating Committee of Pinnacle West. Ms. Bryan is the Chief Financial Officer of Insight Enterprises Inc. Insight is a technology company and a vendor of APS providing information technology services and computer hardware and software products.