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The recipient retained all other shares."}],"balance_after":3468,"source":{"system":"sec-edgar","filing":"0001628280-26-011299","document":"wk-form4_1771974550.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":6,"url":"https://www.sec.gov/Archives/edgar/data/764622/000162828026011299/wk-form4_1771974550.xml","form_type":"4"}},{"id":886902,"issuer":{"id":3465,"kind":"organization","name":"PINNACLE WEST CAPITAL CORP"},"owners":[{"id":56950,"kind":"person","name":"Baum Shirley A","position":1,"cik":"0002069496","reported_name":"Baum Shirley A","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"SVP and GC"}}],"security":"Common Sock","published_at":"2026-02-24T23:09:13.000Z","date":"2026-02-20","kind":"disposition_to_issuer","planned":false,"acquired":false,"shares":32,"price":98.34,"value":3146.88,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F2","text":"Represents the cash settlement of Restricted Stock Units received in connection with the settlement of dividend equivalent rights."}],"balance_after":3548,"source":{"system":"sec-edgar","filing":"0001628280-26-011299","document":"wk-form4_1771974550.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":5,"url":"https://www.sec.gov/Archives/edgar/data/764622/000162828026011299/wk-form4_1771974550.xml","form_type":"4"}},{"id":886901,"issuer":{"id":3465,"kind":"organization","name":"PINNACLE WEST CAPITAL CORP"},"owners":[{"id":56950,"kind":"person","name":"Baum Shirley A","position":1,"cik":"0002069496","reported_name":"Baum Shirley A","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"SVP and GC"}}],"security":"Common Sock","published_at":"2026-02-24T23:09:13.000Z","date":"2026-02-20","kind":"exercise","planned":false,"acquired":true,"shares":198,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","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. 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. The Restricted Stock Units will be settled in 100% shares of\ncommon stock."}],"balance_after":3580,"source":{"system":"sec-edgar","filing":"0001628280-26-011299","document":"wk-form4_1771974550.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":4,"url":"https://www.sec.gov/Archives/edgar/data/764622/000162828026011299/wk-form4_1771974550.xml","form_type":"4"}},{"id":886900,"issuer":{"id":3465,"kind":"organization","name":"PINNACLE WEST CAPITAL CORP"},"owners":[{"id":56950,"kind":"person","name":"Baum Shirley A","position":1,"cik":"0002069496","reported_name":"Baum Shirley A","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"SVP and GC"}}],"security":"Common Sock","published_at":"2026-02-24T23:09:13.000Z","date":"2026-02-20","kind":"tax_withholding","planned":false,"acquired":false,"shares":66,"price":98.34,"value":6490.44,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F3","text":"Shares retained by the Company for purpose of meeting tax withholding requirements. The recipient retained all other shares."}],"balance_after":3382,"source":{"system":"sec-edgar","filing":"0001628280-26-011299","document":"wk-form4_1771974550.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/764622/000162828026011299/wk-form4_1771974550.xml","form_type":"4"}},{"id":886899,"issuer":{"id":3465,"kind":"organization","name":"PINNACLE WEST CAPITAL CORP"},"owners":[{"id":56950,"kind":"person","name":"Baum Shirley A","position":1,"cik":"0002069496","reported_name":"Baum Shirley A","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"SVP and GC"}}],"security":"Common Sock","published_at":"2026-02-24T23:09:13.000Z","date":"2026-02-20","kind":"disposition_to_issuer","planned":false,"acquired":false,"shares":32,"price":98.34,"value":3146.88,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F2","text":"Represents the cash settlement of Restricted Stock Units received in connection with the settlement of dividend equivalent rights."}],"balance_after":3448,"source":{"system":"sec-edgar","filing":"0001628280-26-011299","document":"wk-form4_1771974550.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/764622/000162828026011299/wk-form4_1771974550.xml","form_type":"4"}},{"id":886898,"issuer":{"id":3465,"kind":"organization","name":"PINNACLE WEST CAPITAL CORP"},"owners":[{"id":56950,"kind":"person","name":"Baum Shirley A","position":1,"cik":"0002069496","reported_name":"Baum Shirley A","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"SVP and GC"}}],"security":"Common Sock","published_at":"2026-02-24T23:09:13.000Z","date":"2026-02-20","kind":"exercise","planned":false,"acquired":true,"shares":169,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","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. 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. The Restricted Stock Units will be settled in 100% shares of\ncommon stock."}],"balance_after":3480,"source":{"system":"sec-edgar","filing":"0001628280-26-011299","document":"wk-form4_1771974550.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/764622/000162828026011299/wk-form4_1771974550.xml","form_type":"4"}},{"id":895187,"issuer":{"id":3465,"kind":"organization","name":"PINNACLE WEST CAPITAL CORP"},"owners":[{"id":56950,"kind":"person","name":"Baum Shirley A","position":1,"cik":"0002069496","reported_name":"Baum Shirley A","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"SVP and GC"}}],"security":"Restricted Stock Unit","published_at":"2026-02-19T21:01:51.000Z","date":"2026-02-17","kind":"grant","planned":false,"acquired":true,"shares":3440,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"On February 17, 2026, the recipient received the number specified above of Restricted Stock Units and related Dividend Equivalents. Each Restricted Stock Unit represents a contingent right to\nreceive the economic equivalent of one share of the Company's common stock. The Restricted Stock Units will be settled in common stock. When the Company declares a cash dividend on its stock from\nthe date of grant until the applicable vesting date, the recipient will be credited with additional Restricted Stock Units in satisfaction of the Dividend Equivalents Award. Vested Restricted Stock Units in satisfaction of the Dividend Equivalents Award will be made in cash."},{"field":"price","element":"transactionPricePerShare","label":"F1","text":"On February 17, 2026, the recipient received the number specified above of Restricted Stock Units and related Dividend Equivalents. Each Restricted Stock Unit represents a contingent right to\nreceive the economic equivalent of one share of the Company's common stock. The Restricted Stock Units will be settled in common stock. When the Company declares a cash dividend on its stock from\nthe date of grant until the applicable vesting date, the recipient will be credited with additional Restricted Stock Units in satisfaction of the Dividend Equivalents Award. Vested Restricted Stock Units in satisfaction of the Dividend Equivalents Award will be made in cash."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F2","text":"The Restricted Stock Units award was granted and was effective in February 2026, and vests in four equal, annual installments beginning on February 20, 2027."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F2","text":"The Restricted Stock Units award was granted and was effective in February 2026, and vests in four equal, annual installments beginning on February 20, 2027."}],"balance_after":3440,"derivative":{"underlying":"Common Stock","underlying_shares":3440},"source":{"system":"sec-edgar","filing":"0001628280-26-009697","document":"wk-form4_1771534907.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/764622/000162828026009697/wk-form4_1771534907.xml","form_type":"4"}}]}