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The exchange fund closed on January 19, 2018, and the reporting person's shares of PNW's common stock were contributed on that date consistent with the exchange fund's offering memorandum and the terms of the November 21 Letter. 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These shares were sold in multiple transactions at prices ranging from $89.22 to $89.86, inclusive.  The reporting person undertakes to provide Pinnacle West Capital Corporation (\"PNW\"), any security holder of PNW, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in this footnote."}],"balance_after":118574,"source":{"system":"sec-edgar","filing":"0001209191-17-060669","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/764622/000120919117060669/doc4.xml","form_type":"4"}},{"id":4183384,"issuer":{"id":3465,"kind":"organization","name":"PINNACLE WEST CAPITAL CORP"},"owners":[{"id":154266,"kind":"person","name":"BRANDT DONALD E","position":1,"cik":"0001158683","reported_name":"BRANDT DONALD E","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chairman, President & CEO"}}],"security":"Common Stock","published_at":"2017-10-19T21:12:42.000Z","date":"2017-10-17","kind":"tax_withholding","acquired":false,"shares":1566,"price":87.76,"value":137432.16,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F2","text":"Shares retained by the Company for the purpose of meeting tax withholding requirements. 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The reporting person undertakes to provide Pinnacle West Capital Corporation (\"PNW\"), any security holder of PNW, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in this footnote."}],"balance_after":118574,"source":{"system":"sec-edgar","filing":"0001209191-17-050289","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/764622/000120919117050289/doc4.xml","form_type":"4"}},{"id":4329382,"issuer":{"id":3465,"kind":"organization","name":"PINNACLE WEST CAPITAL CORP"},"owners":[{"id":154266,"kind":"person","name":"BRANDT DONALD E","position":1,"cik":"0001158683","reported_name":"BRANDT DONALD E","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chairman, President & CEO"}}],"security":"Common Stock","published_at":"2017-05-09T22:18:54.000Z","date":"2017-05-05","kind":"other","acquired":false,"shares":1728,"price":84.87,"value":146655.36,"ownership":{"direct":false,"nature":"by 401(k)"},"balance_after":0,"source":{"system":"sec-edgar","filing":"0001209191-17-031060","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/764622/000120919117031060/doc4.xml","form_type":"4"}},{"id":4329381,"issuer":{"id":3465,"kind":"organization","name":"PINNACLE WEST CAPITAL CORP"},"owners":[{"id":154266,"kind":"person","name":"BRANDT DONALD E","position":1,"cik":"0001158683","reported_name":"BRANDT DONALD E","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chairman, President & CEO"}}],"security":"Common Stock","published_at":"2017-05-09T22:18:54.000Z","date":"2017-05-05","kind":"sale","acquired":false,"shares":52134,"price":84.7,"value":4415749.8,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"The price in column 4 is a weighted average price.  These shares were sold in multiple transactions at prices ranging from $84.60 to $84.81, inclusive.  The reporting person undertakes to provide Pinnacle West Capital Corporation (\"PNW\"), any security holder of PNW, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote."}],"balance_after":153587,"source":{"system":"sec-edgar","filing":"0001209191-17-031060","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/764622/000120919117031060/doc4.xml","form_type":"4"}},{"id":4399494,"issuer":{"id":3465,"kind":"organization","name":"PINNACLE WEST CAPITAL CORP"},"owners":[{"id":154266,"kind":"person","name":"BRANDT DONALD E","position":1,"cik":"0001158683","reported_name":"BRANDT DONALD E","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chairman, President & CEO"}}],"security":"Common Stock","published_at":"2017-03-07T22:10:57.000Z","date":"2017-03-03","kind":"sale","acquired":false,"shares":48603,"price":82.73,"value":4020926.19,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"The price in column 4 is a weighted average price.  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The reporting person undertakes to provide Pinnacle West Capital Corporation (\"PNW\"), any security holder of PNW, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in this footnote to this Form 4."}],"balance_after":205721,"source":{"system":"sec-edgar","filing":"0001209191-17-018841","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/764622/000120919117018841/doc4.xml","form_type":"4"}},{"id":4407507,"issuer":{"id":3465,"kind":"organization","name":"PINNACLE WEST CAPITAL CORP"},"owners":[{"id":154266,"kind":"person","name":"BRANDT DONALD E","position":1,"cik":"0001158683","reported_name":"BRANDT DONALD E","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chairman, President & CEO"}}],"security":"Common Stock","published_at":"2017-03-03T21:19:13.000Z","date":"2017-03-01","kind":"tax_withholding","acquired":false,"shares":368,"price":82.4,"value":30323.2,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F2","text":"Shares retained by the Company for the purpose of meeting tax withholding requirements. 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The RSUs in this footnote 11 will be settled, at the reporting person's election, in 100% shares of common stock, 50% in common stock and 50% in cash, or 100% cash."},{"field":"price","element":"transactionPricePerShare","label":"F11","text":"Each RSU represents a contingent right to receive the economic equivalent of one share of the Company's common stock. The RSUs in this footnote 11 will be settled, at the reporting person's election, in 100% shares of common stock, 50% in common stock and 50% in cash, or 100% cash."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F12","text":"The RSU award was granted and was effective on February 21, 2017, and vests in four equal, annual installments beginning on February 20, 2018, and will be settled in four equal, annual installments beginning February 20, 2018."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F12","text":"The RSU award was granted and was effective on February 21, 2017, and vests in four equal, annual installments beginning on February 20, 2018, and will be settled in four equal, annual installments beginning February 20, 2018."}],"balance_after":22064,"derivative":{"underlying":"Common Stock","underlying_shares":22064},"source":{"system":"sec-edgar","filing":"0001209191-17-013858","document":"doc4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":17,"url":"https://www.sec.gov/Archives/edgar/data/764622/000120919117013858/doc4.xml","form_type":"4"}},{"id":4429668,"issuer":{"id":3465,"kind":"organization","name":"PINNACLE WEST CAPITAL CORP"},"owners":[{"id":154266,"kind":"person","name":"BRANDT DONALD E","position":1,"cik":"0001158683","reported_name":"BRANDT DONALD E","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chairman, President & CEO"}}],"security":"Restricted Stock Units","published_at":"2017-02-23T22:02:00.000Z","date":"2017-02-21","kind":"exercise","acquired":false,"shares":59039,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F9","text":"Each RSU represents a contingent right to receive the economic equivalent of one share of the Company's common stock."},{"field":"price","element":"transactionPricePerShare","label":"F9","text":"Each RSU represents a contingent right to receive the economic equivalent of one share of the Company's common stock."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F10","text":"Represents 50,617 RSUs that were granted on 12/19/2012, and 8,422 RSUs that were granted in respect of related dividend equivalent rights over the vesting period. All such RSUs vested on 12/31/2016 and were settled through the issuance of common stock on 02/21/2017 as described in footnote 1."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F10","text":"Represents 50,617 RSUs that were granted on 12/19/2012, and 8,422 RSUs that were granted in respect of related dividend equivalent rights over the vesting period. 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The recipient retained all other shares."}],"balance_after":251932,"source":{"system":"sec-edgar","filing":"0001209191-17-013858","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":12,"url":"https://www.sec.gov/Archives/edgar/data/764622/000120919117013858/doc4.xml","form_type":"4"}},{"id":4429664,"issuer":{"id":3465,"kind":"organization","name":"PINNACLE WEST CAPITAL CORP"},"owners":[{"id":154266,"kind":"person","name":"BRANDT DONALD E","position":1,"cik":"0001158683","reported_name":"BRANDT DONALD E","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chairman, President & CEO"}}],"security":"Common Stock","published_at":"2017-02-23T22:02:00.000Z","date":"2017-02-21","kind":"grant","acquired":true,"shares":38036,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F7","text":"Shares acquired upon the vesting of the portion of the performance shares granted in 2014 that were tied to the total shareholder return performance metric."},{"field":"price","element":"transactionPricePerShare","label":"F7","text":"Shares acquired upon the vesting of the portion of the performance shares granted in 2014 that were tied to the total shareholder return performance metric."}],"balance_after":269828,"source":{"system":"sec-edgar","filing":"0001209191-17-013858","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":11,"url":"https://www.sec.gov/Archives/edgar/data/764622/000120919117013858/doc4.xml","form_type":"4"}},{"id":4429663,"issuer":{"id":3465,"kind":"organization","name":"PINNACLE WEST CAPITAL CORP"},"owners":[{"id":154266,"kind":"person","name":"BRANDT DONALD E","position":1,"cik":"0001158683","reported_name":"BRANDT DONALD E","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chairman, President & CEO"}}],"security":"Common Stock","published_at":"2017-02-23T22:02:00.000Z","date":"2017-02-21","kind":"tax_withholding","acquired":false,"shares":1321,"price":79.77,"value":105376.17,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F2","text":"Shares retained by the Company for the purpose of meeting tax withholding requirements. The recipient retained all other shares."}],"balance_after":231792,"source":{"system":"sec-edgar","filing":"0001209191-17-013858","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":10,"url":"https://www.sec.gov/Archives/edgar/data/764622/000120919117013858/doc4.xml","form_type":"4"}},{"id":4429662,"issuer":{"id":3465,"kind":"organization","name":"PINNACLE WEST CAPITAL CORP"},"owners":[{"id":154266,"kind":"person","name":"BRANDT DONALD E","position":1,"cik":"0001158683","reported_name":"BRANDT DONALD E","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chairman, President & CEO"}}],"security":"Common Stock","published_at":"2017-02-23T22:02:00.000Z","date":"2017-02-21","kind":"grant","acquired":true,"shares":2806,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F6","text":"Represents shares of common stock received by the individual in settlement of RSUs that were granted in respect of dividend rights that vested in connection with the 16,873 shares acquired as reported in footnote 5."},{"field":"price","element":"transactionPricePerShare","label":"F6","text":"Represents shares of common stock received by the individual in settlement of RSUs that were granted in respect of dividend rights that vested in connection with the 16,873 shares acquired as reported in footnote 5."}],"balance_after":233113,"source":{"system":"sec-edgar","filing":"0001209191-17-013858","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":9,"url":"https://www.sec.gov/Archives/edgar/data/764622/000120919117013858/doc4.xml","form_type":"4"}},{"id":4429661,"issuer":{"id":3465,"kind":"organization","name":"PINNACLE WEST CAPITAL CORP"},"owners":[{"id":154266,"kind":"person","name":"BRANDT DONALD E","position":1,"cik":"0001158683","reported_name":"BRANDT DONALD E","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chairman, President & CEO"}}],"security":"Common Stock","published_at":"2017-02-23T22:02:00.000Z","date":"2017-02-21","kind":"tax_withholding","acquired":false,"shares":7939,"price":79.77,"value":633294.03,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F2","text":"Shares retained by the Company for the purpose of meeting tax withholding requirements. The recipient retained all other shares."}],"balance_after":230307,"source":{"system":"sec-edgar","filing":"0001209191-17-013858","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":8,"url":"https://www.sec.gov/Archives/edgar/data/764622/000120919117013858/doc4.xml","form_type":"4"}},{"id":4429660,"issuer":{"id":3465,"kind":"organization","name":"PINNACLE WEST CAPITAL CORP"},"owners":[{"id":154266,"kind":"person","name":"BRANDT DONALD E","position":1,"cik":"0001158683","reported_name":"BRANDT DONALD E","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chairman, President & CEO"}}],"security":"Common Stock","published_at":"2017-02-23T22:02:00.000Z","date":"2017-02-21","kind":"grant","acquired":true,"shares":16873,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F5","text":"Shares acquired in connection with RSUs granted on 12/19/2012 that were subject to the achievement of both a performance goal relating to return on equity and the Human Resources Committee's determination based on the recipient's overall leadership effectiveness from the grant date through 12/31/2016."},{"field":"price","element":"transactionPricePerShare","label":"F5","text":"Shares acquired in connection with RSUs granted on 12/19/2012 that were subject to the achievement of both a performance goal relating to return on equity and the Human Resources Committee's determination based on the recipient's overall leadership effectiveness from the grant date through 12/31/2016."}],"balance_after":238246,"source":{"system":"sec-edgar","filing":"0001209191-17-013858","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":7,"url":"https://www.sec.gov/Archives/edgar/data/764622/000120919117013858/doc4.xml","form_type":"4"}},{"id":4429659,"issuer":{"id":3465,"kind":"organization","name":"PINNACLE WEST CAPITAL CORP"},"owners":[{"id":154266,"kind":"person","name":"BRANDT DONALD E","position":1,"cik":"0001158683","reported_name":"BRANDT DONALD E","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chairman, President & CEO"}}],"security":"Common Stock","published_at":"2017-02-23T22:02:00.000Z","date":"2017-02-21","kind":"tax_withholding","acquired":false,"shares":1319,"price":79.77,"value":105216.63,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F2","text":"Shares retained by the Company for the purpose of meeting tax withholding requirements. 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All such RSUs vested on 12/31/2016, and were settled through the issuance of common stock on 02/21/2017."},{"field":"price","element":"transactionPricePerShare","label":"F1","text":"Shares acquired in connection with 50,617 Restricted Stock Units (\"RSUs\") that were granted on 12/19/2012 and 8,422 RSUs that were granted in respect of related dividend equivalent rights over the vesting period. 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The Restricted Stock Units will be settled, at the reporting person's election, in shares of common stock or 50% in common stock and 50% in cash."},{"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, at the reporting person's election, in shares of common stock or 50% in common stock and 50% in cash."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F7","text":"The Restricted Stock Units award was granted and was effective in February 2016, and vests in four equal, annual installments beginning on February 20, 2017. Since February 20, 2017 was a Federal holiday, the Restricted Stock Units vested and were released on February 17, 2017."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F7","text":"The Restricted Stock Units award was granted and was effective in February 2016, and vests in four equal, annual installments beginning on February 20, 2017. 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