X0508 4 2025-02-20 0 0000764622 PINNACLE WEST CAPITAL CORP PNW 0001628362 Smith Robert Edgar 400 N. 5TH STREET PHOENIX AZ 85004 0 1 0 0 EVP, CLO, and CDO 0 Common Stock 2025-02-20 4 M 0 477 A 8427 D Common Stock 2025-02-20 4 D 0 477 90.77 D 7950 D Common Stock 2025-02-20 4 M 0 477 A 8427 D Common Stock 2025-02-20 4 F 0 223 90.77 D 8204 D Common Stock 2025-02-20 4 M 0 1027 A 9231 D Common Stock 2025-02-20 4 D 0 128 90.77 D 9103 D Common Stock 2025-02-20 4 F 0 372 90.77 D 8731 D Common Stock 2025-02-20 4 M 0 1135 A 9866 D Common Stock 2025-02-20 4 D 0 98 90.77 D 9768 D Common Stock 2025-02-20 4 F 0 429 90.77 D 9339 D Common Stock 2025-02-20 4 M 0 1472 A 10811 D Common Stock 2025-02-20 4 D 0 61 90.77 D 10750 D Common Stock 2025-02-20 4 F 0 584 90.77 D 10166 D Common Stock 2025-02-20 4 A 0 80 A 10246 D Common Stock 2025-02-20 4 F 0 34 90.77 D 10212 D Restricted Stock Units 2025-02-20 4 M 0 954 D Common Stock 954 0 D Restricted Stock Units 2025-02-20 4 M 0 1027 D Common Stock 1027 1031 D Restricted Stock Units 2025-02-20 4 M 0 1135 D Common Stock 1135 2262 D Restricted Stock Units 2025-02-20 4 M 0 1472 D Common Stock 1472 4415 D 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, at the reporting person's election, in 100% shares of common stock, 50% in common stock and 50% in cash, or 100% in cash. Shares retained by the Company for purpose of meeting tax withholding requirements. The recipient retained all other shares. 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. 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 2021 Restricted Stock Unit grant. 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 128 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. 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 132 Restricted Stock Units received in connection with the settlement of dividend equivalent rights. The number of derivative securities in Column 5 includes 98 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. 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 188 Restricted Stock Units received in connection with the settlement of dividend equivalent rights. The number of derivative securities in Column 5 includes 61 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. 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. Includes 182 Restricted Stock Units received in connection with the settlement of dividend equivalent rights. /s/ Diane Wood, Attorney-in-Fact 2025-02-24