Pinnacle West(PNW) - 2024 Q3 - Quarterly Results

Exhibit 99.1 FOR IMMEDIATE RELEASE November 6, 2024 Media Contact: Analyst Contact: Alan Bunnell (602) 250-3376 Amanda Ho (602) 250-3334 Website: pinnaclewest.com PINNACLE WEST REPORTS SLIGHTLY LOWER 2024 THIRD-QUARTER RESULTS COMPARED TO A YEAR AGO • Record-setting summer heat drives increase in customer sales and usage • Operating performance, reliability remain strong for customers • Creative approach used to address monsoon outages, restore power PHOENIX – Pinnacle West Capital Corp. (NYSE: PNW) today r ...