X0508 4 2024-02-20 0000764622 PINNACLE WEST CAPITAL CORP PNW 0001628362 Smith Robert Edgar 400 N. 5TH STREET PHOENIX AZ 85004 false true false false EVP, GC, and CDO false Common Stock 2024-02-20 4 A false 1803 A 10291 D Common Stock 2024-02-20 4 F false 814 69.10 D 9477 D Common Stock 2024-02-20 4 A false 287 A 9764 D Common Stock 2024-02-20 4 F false 119 69.10 D 9645 D Common Stock 2024-02-20 4 M false 344 A 9989 D Common Stock 2024-02-20 4 D false 344 69.10 D 9645 D Common Stock 2024-02-20 4 M false 344 A 9989 D Common Stock 2024-02-20 4 F false 143 69.10 D 9846 D Common Stock 2024-02-20 4 M false 477 A 10323 D Common Stock 2024-02-20 4 D false 477 69.10 D 9846 D Common Stock 2024-02-20 4 M false 477 A 10323 D Common Stock 2024-02-20 4 F false 198 69.10 D 10125 D Common Stock 2024-02-20 4 M false 985 A 11110 D Common Stock 2024-02-20 4 D false 86 69.10 D 11024 D Common Stock 2024-02-20 4 F false 372 69.10 D 10652 D Common Stock 2024-02-20 4 M false 1084 A 11736 D Common Stock 2024-02-20 4 D false 47 69.10 D 11689 D Common Stock 2024-02-20 4 F false 429 69.10 D 11260 D Common Stock 2024-02-20 4 A false 150 A 11410 D Common Stock 2024-02-20 4 F false 63 69.10 D 11347 D Restricted Stock Units 2024-02-20 4 M false 688 D Common Stock 688 0 D Restricted Stock Units 2024-02-20 4 M false 954 D Common Stock 954 954 D Restricted Stock Units 2024-02-20 4 M false 985 D Common Stock 985 1973 D Restricted Stock Units 2024-02-20 4 M false 1084 D Common Stock 1084 3256 D Restricted Stock Units 2024-02-20 4 A false 5644 A Common Stock 5644 5644 D Shares aquired upon the vesting of a portion of the performance shares granted in 2021 that were tied to the total shareholder return performance metric. Shares retained by the Company for purpose of meeting tax withholding requirements. The receipient retained all other shares. Represents shares of common stock received by the indididual in settlement of dividend rights that vested in connection with the performance shares that vested on February 20, 2024. 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, atthe reporting person's election, in 100% shares of common stock, 50% in common stock and 50% in cash, or 100% in cash. 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 settledeither in 100% shares of common stock or 100% in cash with respect to Restricted Stock Units received in connection with the settlement of divident equivalent rights. Represents the cash settlement of Restricted Stock Units received in connection with the settlement of dividend equivalent rights. Represents shares of common stock received by the individual in settlement of dividend rights granted in connection with the 2020 and 2021 Restricted Stock Unit grants. The Restricted Stock Units award was granted and was effective in February 2020, and vests in four equal, annual installments beginning on February 20, 2021. The Restricted Stock Units award was granted and was effective in February 2021, and vests and be settled in four equal, annual installments beginning on February 20, 2022. The number of derivative securities in Column 5 includes 86 vested Restricted Stock Units received in connection with the settlement of dividend equivalent rights. Dividendequivalent rights accrue with respect to these Restricted Stock Units when and as cash dividends are paid on the Company's common stock. 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. Includes 175 Restricted Stock Units received in connection with the settlement of dividend equivalent rights. The number of derivative securities in Column 5 includes 47 vested Restricted Stock Units received in connection with the settlement of dividend equivalent rights. Dividend equivalentrights accrue with respect to these Restricted Stock Units when and as cash dividends are paid on the Company's common stock. 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. Includes 145 Restricted Stock Units received in connection with the settlement of dividend equivalent rights. 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. /s/ Diane Wood, Attorney-in-Fact 2024-02-20