X0508 4 2023-10-17 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 2023-10-17 4 A false 2826 0 A 11678 D Common Stock 2023-10-17 4 F false 1169 76.18 D 10509 D Common Stock 2023-10-17 4 A false 476 0 A 10985 D Common Stock 2023-10-17 4 F false 197 76.18 D 10788 D Shares acquired upon the vesting of a portion of the performance shares granted in 2020 that were tied to the operational performance metric. Shares retained by the Company for the purpose of meeting tax withholding requirements. The recipient retained all other shares. Represents shares of common stock received by the individual in settlement of dividend rights that vested in connection with the performance shares that vested on October 17, 2023. /s/ Diane Wood, Attorney-in-Fact 2023-10-17