{"url_path":"/sec/pnw/8-k/2026-06-05/cover-page","section_key":"cover-page","section_title":"Cover Page","topic":"sec","document":{"doc_type":"8-K","doc_date":"2026-06-05","source_url":"https://www.sec.gov/Archives/edgar/data/764622/0001104659-26-070960-index.html","accession_number":"0001104659-26-070960","cik":"0000764622","ticker":"PNW","issuer_name":"PINNACLE WEST CAPITAL CORP","edgar_url":"https://www.sec.gov/Archives/edgar/data/764622/0001104659-26-070960-index.html","primary_entity_key":"0000764622","primary_entity_name":"PINNACLE WEST CAPITAL CORP"},"word_count":288,"has_tables":true,"body_markdown":"false\n0000764622\n\n0000764622\n\n2026-06-01\n2026-06-01\n\niso4217:USD\n\nxbrli:shares\n\niso4217:USD\n\nxbrli:shares\n\n \n\n \n\n**UNITED STATES**\n\n**SECURITIES AND EXCHANGE COMMISSION**\n\n**WASHINGTON, DC 20549**\n\n \n\n \n\n \n\n**FORM 8-K**\n\n \n\n \n\n \n\n**CURRENT REPORT**\n\n**Pursuant to Section 13 or 15(d) of\nthe**\n\n**Securities Exchange Act of 1934**\n\n \n\n \n**Date\nof report (Date of earliest event reported):**\nJune 1, 2026\n \n\n \n\n \n\n \n\n**Commission File**\n\n**Number**\n\n \n\n**Exact Name of Each Registrant as specified in its**\n\n**charter; State of Incorporation; Address; and**\n\n**Telephone Number**\n\n \n\n**IRS Employer**\n\n**Identification No.**\n\n1-8962\n \n**PINNACLE\nWEST CAPITAL CORPORATION**\n \n86-0512431\n\n \n \n(an Arizona\ncorporation)\n \n \n\n \n \n400 North\nFifth Street, P.O. Box 53999\n \n \n\n \n \nPhoenix\nArizona\n85072-3999\n \n \n\n \n \n(602)\n250-1000\n \n \n \n\n \n\nCheck the appropriate box below if the Form 8-K\nfiling is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:\n\n \n\n¨ \nWritten communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)\n\n \n \n\n¨ \nSoliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)\n\n \n \n\n¨ \nPre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17\nCFR 240.14d-2(b))\n\n \n \n\n¨ \nPre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17\nCFR 240.13e-4(c))\n\n \n\nSecurities registered pursuant to Section 12(b) of the Act:\n\n \n\nTitle\nof each class\nTrading\nSymbol(s)\nName\nof each exchange on which registered\n\nCommon\nStock\nPNW\nThe New\nYork Stock Exchange\n\n \n\nIndicate by check mark whether the registrant is\nan emerging growth company as defined in Rule 405 of the Securities Act of 1933 (17 CFR §230.405) or Rule 12b-2 of the\nSecurities Exchange Act of 1934 (17 CFR §240.12b-2).\n\n \n\nEmerging growth\ncompany\n¨\n\n \n\nIf an emerging growth company, indicate by check\nmark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting\nstandards provided pursuant to Section 13(a) of the Exchange Act. ¨"}