A Dark Vector Cognition product

Item 6. EXHIBITS

10K characters. Original on sec.gov ·

Item 6. EXHIBITS

(a) Exhibits

Exhibit No.Registrant(s)DescriptionPreviously Filed as ExhibitDate Filed
3.1Pinnacle WestArticles of Incorporation, restated as of May 22, 20253.1 to Pinnacle West/APS June 30, 2025 Form 10-Q Report8/6/2025
3.2Pinnacle WestBylaws, amended as of February 19, 20203.1 to Pinnacle West/APS Form 8-K Report filed February 25, 20202/25/2020
3.3APSArticles of Incorporation, restated as of May 16, 20123.3 to Pinnacle West/APS June 30, 2025 Form 10-Q Report8/6/2025
3.4APSBylaws, amended as of December 16, 20083.4 to Pinnacle West/APS December 31, 2008 Form 10-K Report2/20/2009
4.1Pinnacle West APSThirty-Third Supplemental Indenture dated as of March 12, 20264.1 to Pinnacle West/APS March 10, 2026 Form 8-K Report3/12/2026
31.1Pinnacle WestCertificate of Theodore N. Geisler, Chief Executive Officer, pursuant to Rule 13a-14(a) and Rule 15d-14(a) of the Securities Exchange Act of 1934, as amended
31.2Pinnacle WestCertificate of Andrew Cooper, Chief Financial Officer, pursuant to Rule 13a-14(a) and Rule 15d-14(a) of the Securities Exchange Act of 1934, as amended
31.3APSCertificate of Theodore N. Geisler, Chief Executive Officer, pursuant to Rule 13a-14(a) and Rule 15d-14(a) of the Securities Exchange Act of 1934, as amended
31.4APSCertificate of Andrew Cooper, Chief Financial Officer, pursuant to Rule 13a-14(a) and Rule 15d-14(a) of the Securities Exchange Act of 1934, as amended
32.1(a)Pinnacle WestCertification of Chief Executive Officer and Chief Financial Officer, pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002
32.2(a)APSCertification of Chief Executive Officer and Chief Financial Officer, pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002
101.INSPinnacle West APSInline XBRL Instance Document - the instance document does not appear in the interactive data file because its XBRL tags are embedded within the Inline XBRL document.
101.SCHPinnacle West APSInline XBRL Taxonomy Extension Schema Document
101.CALPinnacle West APSInline XBRL Taxonomy Extension Calculation Linkbase Document
101.LABPinnacle West APSInline XBRL Taxonomy Extension Label Linkbase Document
101.PREPinnacle West APSInline XBRL Taxonomy Extension Presentation Linkbase Document
101.DEFPinnacle West APSInline XBRL Taxonomy Definition Linkbase Document
104Pinnacle West APSCover Page Interactive Data File (formatted as Inline XBRL and contained in Exhibit 101)

(a) Furnished herewith as an exhibit.

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, each registrant has duly caused this report to be signed on its behalf by the undersigned thereunto duly authorized.

PINNACLE WEST CAPITAL CORPORATION
(Registrant)
Dated:May 4, 2026By:/s/ Andrew Cooper
Andrew Cooper
Senior Vice President and
Chief Financial Officer
(Principal Financial Officer and
Officer Duly Authorized to sign this Report)
ARIZONA PUBLIC SERVICE COMPANY
(Registrant)
Dated:May 4, 2026By:/s/ Andrew Cooper
Andrew Cooper
Senior Vice President and
Chief Financial Officer
(Principal Financial Officer and
Officer Duly Authorized to sign this Report)

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