First-Quarter Financial Results, Conference Call Scheduled for May 4

Pinnacle West Capital Corporation’s (NYSE: PNW) board of directors today declared a quarterly dividend of $0.91 per share of common stock, payable on June 1, 2026, to shareholders of record at the close of business on May 4, 2026.

Earnings Release, Webcast and Conference Call

In addition, as previously announced, Pinnacle West plans to release its 2026 first-quarter financial results before the U.S. financial markets open on Monday, May 4, 2026.

That same day at noon ET (9 a.m. Arizona time), management will host a live webcast and conference call to discuss financial results and recent developments. The webcast can be accessed at pinnaclewest.com/presentations and will be available for replay on the website for 30 days. To access the live conference call by telephone, dial (888) 506-0062 or (973) 528-0011 for international callers and enter participant access code 699156. A replay of the call also will be available at pinnaclewest.com/presentations or by telephone until 11:59 p.m. ET, Monday, May 11, 2026, by calling (877) 481-4010 in the U.S. and Canada or (919) 882-2331 internationally and entering replay passcode 53811.

General Information

Pinnacle West Capital Corp., an energy holding company based in Phoenix, has consolidated assets of about $30 billion, about 6,200 megawatts of generating capacity and approximately 6,600 employees in Arizona and New Mexico. Through its principal subsidiary, Arizona Public Service, the company provides retail electricity service to about 1.4 million Arizona homes and businesses. For more information about Pinnacle West, visit the company’s website at pinnaclewest.com.

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