ARIZONA PUBLIC SERVICE CO
For the period ended Dec 31, 2025. Filed Feb 25, 2026.
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FY2025 · Filed Feb 25, 2026
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SIGNATURES
Pursuant to the requirements of Section 13 or 15(d) of the Securities Exchange Act of 1934, the Registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized.
| PINNACLE WEST CAPITAL CORPORATION | |
| (Registrant) | |
| Date: February 25, 2026 | /s/ Theodore N. Geisler |
|---|---|
| (Theodore N. Geisler, Chairman ofthe Board of Directors, President andChief Executive Officer) |
Power of Attorney
We, the undersigned directors and executive officers of Pinnacle West Capital Corporation, hereby severally appoint Andrew Cooper and Shirley A. Baum, and each of them, our true and lawful attorneys with full power to them and each of them to sign for us, and in our names in the capacities indicated below, any and all amendments to this Annual Report on Form 10-K filed with the Securities and Exchange Commission.
Pursuant to the requirements of the Securities Exchange Act of 1934, this report has been signed below by the following persons on behalf of the registrant and in the capacities and on the dates indicated.
| Signature | Title | Date |
|---|---|---|
| /s/ Theodore N. Geisler | Principal Executive Officer | February 25, 2026 |
| (Theodore N. Geisler, Chairman | and Director | |
| of the Board of Directors, President | ||
| and Chief Executive Officer) | ||
| /s/ Andrew Cooper | Principal Financial Officer | February 25, 2026 |
| (Andrew Cooper, | ||
| Senior Vice President and | ||
| Chief Financial Officer) | ||
| /s/ Elizabeth A. Blankenship | Principal Accounting Officer | February 25, 2026 |
| (Elizabeth A. Blankenship, | ||
| Vice President, Controller and | ||
| Chief Accounting Officer) | ||
| /s/ Glynis A. Bryan | Director | February 25, 2026 |
|---|---|---|
| (Glynis A. Bryan) | ||
| /s/ Ronald Butler, Jr. | Director | February 25, 2026 |
| (Ronald Butler, Jr.) | ||
| /s/ Gonzalo A. de la Melena, Jr. | Director | February 25, 2026 |
| (Gonzalo A. de la Melena, Jr.) | ||
| /s/ Carol S. Eicher | Director | February 25, 2026 |
| (Carol S. Eicher) | ||
| /s/ Susan T. Flanagan | Director | February 25, 2026 |
| (Susan T. Flanagan) | ||
| /s/ Richard P. Fox | Director | February 25, 2026 |
| (Richard P. Fox) | ||
| /s/ Paula J. Sims | Director | February 25, 2026 |
| (Paula J. Sims) | ||
| /s/ William H. Spence | Director | February 25, 2026 |
| (William H. Spence) | ||
| /s/ Kristine L. Svinicki | Director | February 25, 2026 |
| (Kristine L. Svinicki) | ||
| /s/ James E Trevathan, Jr. | Director | February 25, 2026 |
| (James E. Trevathan, Jr.) | ||
SIGNATURES
Pursuant to the requirements of Section 13 or 15(d) of the Securities Exchange Act of 1934, the Registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized.
| ARIZONA PUBLIC SERVICE COMPANY | |
| (Registrant) | |
| Date: February 25, 2026 | /s/ Theodore N. Geisler |
|---|---|
| (Theodore N. Geisler, Chairman ofthe Board of Directors, President andChief Executive Officer) |
Power of Attorney
We, the undersigned directors and executive officers of Arizona Public Service Company, hereby severally appoint Andrew Cooper and Shirley A. Baum, and each of them, our true and lawful attorneys with full power to them and each of them to sign for us, and in our names in the capacities indicated below, any and all amendments to this Annual Report on Form 10-K filed with the Securities and Exchange Commission.
Pursuant to the requirements of the Securities Exchange Act of 1934, this report has been signed below by the following persons on behalf of the registrant and in the capacities and on the dates indicated.
| Signature | Title | Date |
|---|---|---|
| /s/ Theodore N. Geisler | Principal Executive Officer | February 25, 2026 |
| (Theodore N. Geisler, Chairman | and Director | |
| of the Board of Directors, President and | ||
| Chief Executive Officer) | ||
| /s/ Andrew Cooper | Principal Financial Officer | February 25, 2026 |
| (Andrew Cooper, | ||
| Senior Vice President and | ||
| Chief Financial Officer) | ||
| /s/ Elizabeth A. Blankenship | Principal Accounting Officer | February 25, 2026 |
| (Elizabeth A. Blankenship | ||
| Vice President, Controller and | ||
| Chief Accounting Officer) | ||
| /s/ Glynis A. Bryan | Director | February 25, 2026 |
|---|---|---|
| (Glynis A. Bryan) | ||
| /s/ Ronald Butler, Jr. | Director | February 25, 2026 |
| (Ronald Butler, Jr.) | ||
| /s/ Gonzalo A. de la Melena, Jr. | Director | February 25, 2026 |
| (Gonzalo A. de la Melena, Jr.) | ||
| /s/ Carol S. Eicher | Director | February 25, 2026 |
| (Carol S. Eicher) | ||
| /s/ Susan T. Flanagan | Director | February 25, 2026 |
| (Susan T. Flanagan) | ||
| /s/ Richard P. Fox | Director | February 25, 2026 |
| (Richard P. Fox) | ||
| /s/ Paula J. Sims | Director | February 25, 2026 |
| (Paula J. Sims) | ||
| /s/ William H. Spence | Director | February 25, 2026 |
| (William H. Spence) | ||
| /s/ Kristine L. Svinicki | Director | February 25, 2026 |
| (Kristine L. Svinicki) | ||
| /s/ James E Trevathan, Jr. | Director | February 25, 2026 |
| (James E. Trevathan, Jr.) | ||
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