Pinnacle West Capital (PNW)

=== SEC Form 4 — Statement of Changes in Beneficial Ownership === Document Type: 4 Period of Report: 2026-05-14 10b5-1 Pre-arranged Plan: No --- Issuer --- Name: PINNACLE WEST CAPITAL CORP (PNW) CIK: 0000764622 --- Reporting Owner --- Name: de la Melena Gonzalo A Jr CIK: 0001913991 Role: Director --- Derivative Transactions --- [Transaction #1] Security: Stock Units Date: 2026-05-14 | Code: A (Grant or award) Shares: +1,665 Shares Owned After: 1,665 | Ownership: D (Direct) Footnotes: [F1] Each Stock Unit is the economic equivalent of one share of Pinnacle West common stock. The Stock Units vested on May 14, 2026 and will be settled in shares of common stock. The reporting person elected to defer settlement until the second anniversary in which the reporting person separates from service from the Company. [F1] Each Stock Unit is the economic equivalent of one share of Pinnacle West common stock. The Stock Units vested on May 14, 2026 and will be settled in shares of common stock. The reporting person elected to defer settlement until the second anniversary in which the reporting person separates from service from the Company. [F1] Each Stock Unit is the economic equivalent of one share of Pinnacle West common stock. The Stock Units vested on May 14, 2026 and will be settled in shares of common stock. The reporting person elected to defer settlement until the second anniversary in which the reporting person separates from service from the Company. [F1] Each Stock Unit is the economic equivalent of one share of Pinnacle West common stock. The Stock Units vested on May 14, 2026 and will be settled in shares of common stock. The reporting person elected to defer settlement until the second anniversary in which the reporting person separates from service from the Company. --- Footnotes (Complete Index) --- F1: Each Stock Unit is the economic equivalent of one share of Pinnacle West common stock. The Stock Units vested on May 14, 2026 and will be settled in shares of common stock. The reporting person elected to defer settlement until the second anniversary in which the reporting person separates from service from the Company. --- Signature --- /s/ /s/ Melissa Sallee, Attorney-in-Fact (2026-05-18)