Exhibit 99.1 FOR IMMEDIATE RELEASE November 3, 2025 Media Contact: Analyst Contact: Alan Bunnell (602) 250-3376 Amanda Ho (602) 250-3334 Website: pinnaclewest.com PINNACLE WEST REPORTS 2025 THIRD-QUARTER FINANCIAL RESULTS PHOENIX – Pinnacle West Capital Corp. (NYSE: PNW) today reported consolidated net income attributable to common shareholders for the 2025 third quarter of $413.2 million, or$3.39 per diluted share of common stock. This result compares with consolidated net income of $395.0 million, or$3. ...