Date of report (Date of earliest event reported): | November 7, 2025 | ||||||||||
| Commission File Number | Exact Name of Registrant as Specified in Charter; State or Other Jurisdiction of Incorporation; Address of Principal Executive Officers, and Zip Code; and Registrant's telephone Number, Including Area Code) | IRS Employer Identification No. | |||||||||||||||||||||
| 1-8962 | PINNACLE WEST CAPITAL CORPORATION | 86-0512431 | |||||||||||||||||||||
| (an Arizona corporation) | |||||||||||||||||||||||
| 400 North Fifth Street, P.O. Box 53999 | |||||||||||||||||||||||
| Phoenix | Arizona | 85072-3999 | |||||||||||||||||||||
| (602) | 250-1000 | ||||||||||||||||||||||
| 1-4473 | ARIZONA PUBLIC SERVICE COMPANY | 86-0011170 | |||||||||||||||||||||
| (an Arizona corporation) | |||||||||||||||||||||||
| 400 North Fifth Street, P.O. Box 53999 | |||||||||||||||||||||||
| Phoenix | Arizona | 85072-3999 | |||||||||||||||||||||
| (602) | 250-1000 | ||||||||||||||||||||||
| Not Applicable | |||||||||||||||||||||||
| (Former name or former address, if changed since last report.) | |||||||||||||||||||||||
☐ | Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425) | ||||
| ☐ | Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12) | ||||
| ☐ | Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b)) | ||||
| ☐ | Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c)) | ||||
Title of each class | Trading Symbol(s) | Name of each exchange on which registered | ||||||
Common Stock, no par value | PNW | New York Stock Exchange | ||||||
Emerging growth company | ☐ | ||||
| Exhibit No. | Registrant(s) | Description | ||||||
| 99.1 | Pinnacle West Arizona Public Service Company | |||||||
| 104 | Pinnacle West Arizona Public Service Company | 104 Cover Page Interactive Data File (embedded within the Inline XBRL document) | ||||||
| PINNACLE WEST CAPITAL CORPORATION | ||||||||
| (Registrant) | ||||||||
| Dated: November 7, 2025 | By: /s/ Andrew Cooper | |||||||
| Andrew Cooper | ||||||||
| Senior Vice President and | ||||||||
| Chief Financial Officer | ||||||||
| ARIZONA PUBLIC SERVICE COMPANY | ||||||||
| (Registrant) | ||||||||
| Dated: November 7, 2025 | By: /s/ Andrew Cooper | |||||||
| Andrew Cooper | ||||||||
| Senior Vice President and | ||||||||
| Chief Financial Officer | ||||||||