Geisler Theodore N 4

4 · PINNACLE WEST CAPITAL CORP · Filed Feb 24, 2026

Insider Transaction Report

Form 4

Period: 2026-02-20

PINNACLE WEST CAPITAL CORPPNW

Geisler Theodore N

DirectorChairman, CEO and President

Transactions

Exercise/Conversion
Common Stock
[F1]
2026-02-20+2,248→ 2,248 total
Disposition to Issuer
Common Stock
[F2]
2026-02-20$98.34/sh−361$35,501→ 1,887 total
Tax Payment
Common Stock
[F3]
2026-02-20$98.34/sh−790$77,689→ 1,097 total
Exercise/Conversion
Common Stock
[F1]
2026-02-20+1,634→ 2,731 total
Disposition to Issuer
Common Stock
[F2]
2026-02-20$98.34/sh−192$18,881→ 2,539 total
Tax Payment
Common Stock
[F3]
2026-02-20$98.34/sh−604$59,397→ 1,935 total
Exercise/Conversion
Common Stock
[F1]
2026-02-20+1,943→ 3,878 total
Disposition to Issuer
Common Stock
[F2]
2026-02-20$98.34/sh−152$14,948→ 3,726 total
Tax Payment
Common Stock
[F3]
2026-02-20$98.34/sh−750$73,755→ 2,976 total
Exercise/Conversion
Common Stock
[F1]
2026-02-20+1,736→ 4,712 total
Disposition to Issuer
Common Stock
[F2]
2026-02-20$98.34/sh−67$6,589→ 4,645 total
Tax Payment
Common Stock
[F3]
2026-02-20$98.34/sh−699$68,740→ 3,946 total
Exercise/Conversion
Common Stock
[F1]
2026-02-20+2,458→ 6,404 total
Disposition to Issuer
Common Stock
[F2]
2026-02-20$98.34/sh−96$9,441→ 6,308 total
Tax Payment
Common Stock
[F3]
2026-02-20$98.34/sh−989$97,258→ 5,319 total
Gift
Common Stock
[F4]
2026-02-20−5,319→ 0 total
Gift
Common Stock
[F4]
2026-02-20+5,319→ 37,567 total(indirect: By Trust)
Exercise/Conversion
Restricted Stock Units
[F1][F5][F6]
2026-02-20−2,248→ 0 total
→ Common Stock (2,248 underlying)
Exercise/Conversion
Restricted Stock Units
[F1][F7][F8][F9]
2026-02-20−1,634→ 1,638 total
→ Common Stock (1,634 underlying)
Exercise/Conversion
Restricted Stock Units
[F1][F10][F11][F12]
2026-02-20−1,943→ 3,885 total
→ Common Stock (1,943 underlying)
Exercise/Conversion
Restricted Stock Units
[F1][F13][F14][F15]
2026-02-20−1,736→ 5,208 total
→ Common Stock (1,736 underlying)
Exercise/Conversion
Restricted Stock Units
[F1][F16][F17][F18]
2026-02-20−2,458→ 7,369 total
→ Common Stock (2,458 underlying)

Footnotes (18)

[F1]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 in 100% shares of common stock.
[F10]The number of derivative securities in Column 5 includes 152 vested Restricted Stock Units received in connection with the settlement of dividend equivalent rights. Dividend equivalent rights accrue with respect to these Restricted Stock Units when and as cash dividends are paid on the Company's common stock.
[F11]The Restricted Stock Units award was granted and was effective in February 2024, and vests in four equal, annual installments beginning on February 20, 2025.
[F12]Includes 303 Restricted Stock Units received in connection with the settlement of dividend equivalent rights.
[F13]The number of derivative securities in Column 5 includes 67 vested Restricted Stock Units received in connection with the settlement of dividend equivalent rights. Dividend equivalent rights accrue with respect to these Restricted Stock Units when and as cash dividends are paid on the Company's common stock.
[F14]The Restricted Stock Units award was granted and was effective in February 2025, and vests in four equal, annual installments beginning on February 20, 2026.
[F15]Includes 201 Restricted Stock Units received in connection with the settlement of dividend equivalent rights.
[F16]The number of derivative securities in Column 5 includes 96 vested Restricted Stock Units received in connection with the settlement of dividend equivalent rights. Dividend equivalent rights accrue with respect to these Restricted Stock Units when and as cash dividends are paid on the Company's common stock.
[F17]The Restricted Stock Units award was granted and was effective in April 2025, and vests in four equal, annual installments beginning on February 20, 2026.
[F18]The number of derivative securities in Column 5 includes 283 vested Restricted Stock Units received in connection with the settlement of dividend equivalent rights. Dividend equivalent rights accrue with respect to these Restricted Stock Units when and as cash dividends are paid on the Company's common stock.
[F2]Represents the cash settlement of Restricted Stock Units received in connection with the settlement of dividend equivalent rights.
[F3]Shares retained by the Company for purpose of meeting tax withholding requirements. The recipient retained all other shares.
[F4]The reporting person gifted the shares received on February 20, 2026 to a revocable family trust.
[F5]The number of derivative securities in Column 5 includes 361 vested Restricted Stock Units received in connection with the settlement of dividend equivalent rights. Dividend equivalent rights accrue with respect to these Restricted Stock Units when and as cash dividends are paid on the Company's common stock.
[F6]The Restricted Stock Units award was granted and was effective in February 2022, and vests in four equal, annual installments beginning on February 20, 2023.
[F7]The number of derivative securities in Column 5 includes 192 vested Restricted Stock Units received in connection with the settlement of dividend equivalent rights. Dividend equivalent rights accrue with respect to these Restricted Stock Units when and as cash dividends are paid on the Company's common stock.
[F8]The Restricted Stock Units award was granted and was effective in February 2023, and vests in four equal, annual installments beginning on February 20, 2024.
[F9]Includes 196 Restricted Stock Units received in connection with the settlement of dividend equivalent rights.

Signature

/s/ Melissa Sallee, Attorney-in-Fact|2026-02-24

Documents

1 file

4
wk-form4_1771981724.xmlPrimary
FORM 4