Pinnacle West(PNW) - 2025 Q2 - Quarterly Results

Exhibit 99.1 FOR IMMEDIATE RELEASE August 6, 2025 Media Contact: Analyst Contact: Alan Bunnell (602) 250-3376 Amanda Ho (602) 250-3334 Website: pinnaclewest.com PINNACLE WEST REPORTS LOWER 2025 SECOND-QUARTER FINANCIAL RESULTS COMPARED TO A YEAR AGO Prioritizing Reliability and Affordability PHOENIX – Pinnacle West Capital Corp. (NYSE: PNW) today reported a consolidated net income attributable to common shareholders of $192.6 million, or $1.58 per diluted share of common stock, for the quarter ended June 30 ...