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The Restricted Stock Units will be settled in 100% shares of\ncommon stock."},{"field":"price","element":"transactionPricePerShare","label":"F1","text":"Each Restricted Stock Unit represents a contingent right to receive the economic equivalent of one share of the Company's common stock. 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The Restricted Stock Units will be settled in 100% shares of\ncommon stock."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F13","text":"The Restricted Stock Units award was granted and was effective in February 2025, and vests in four equal, annual installments beginning on February 20, 2026."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F13","text":"The Restricted Stock Units award was granted and was effective in February 2025, and vests in four equal, annual installments beginning on February 20, 2026."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F14","text":"Includes 60 Restricted Stock Units received in connection with the settlement of dividend equivalent rights."}],"balance_after":1563,"derivative":{"underlying":"Common Stock","underlying_shares":521},"source":{"system":"sec-edgar","filing":"0001628280-26-011341","document":"wk-form4_1771980951.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":16,"url":"https://www.sec.gov/Archives/edgar/data/764622/000162828026011341/wk-form4_1771980951.xml","form_type":"4"}},{"id":886976,"issuer":{"id":3465,"kind":"organization","name":"PINNACLE WEST CAPITAL CORP"},"owners":[{"id":24863,"kind":"person","name":"Esparza Jose Luis Jr","position":1,"cik":"0001781598","reported_name":"Esparza Jose Luis Jr","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"SVP Public Policy APS"}}],"security":"Restricted Stock Units","published_at":"2026-02-25T00:55:54.000Z","date":"2026-02-20","kind":"exercise","planned":false,"acquired":true,"shares":473,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"Each Restricted Stock Unit represents a contingent right to receive the economic equivalent of one share of the Company's common stock. 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The Restricted Stock Units will be settled in 100% shares of\ncommon stock."},{"field":"shares","element":"transactionShares","label":"F6","text":"The number of derivative securities in Column 5 includes 41 vested Restricted Stock Units received in connection with the settlement of dividend equivalent rights. Dividend equivalent rights\naccrue with respect to these Restricted Stock Units when and as cash dividends are paid on the Company's common stock."},{"field":"price","element":"transactionPricePerShare","label":"F1","text":"Each Restricted Stock Unit represents a contingent right to receive the economic equivalent of one share of the Company's common stock. 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The Restricted Stock Units will be settled in 100% shares of\ncommon stock."},{"field":"shares","element":"transactionShares","label":"F4","text":"The number of derivative securities in Column 5 includes 86 vested Restricted Stock Units received in connection with the settlement of dividend equivalent rights. Dividend equivalent rights accrue\nwith respect to these Restricted Stock Units when and as cash dividends are paid on the Company's common stock."},{"field":"price","element":"transactionPricePerShare","label":"F1","text":"Each Restricted Stock Unit represents a contingent right to receive the economic equivalent of one share of the Company's common stock. 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