APS Regional Energy Overview

4 AT A GLANCE Arizona's Largest Electric Company Nevada LAS VEGAS California YUCCA KINGMAN YUMA Service Territory¹ Arizona APS Retail Electric Service Territory Major APS Power Plants Principal APS Transmission Lines Major APS Solar Power Plants BAGDAD PALO VERDE 00 REDHAWK PRESCOTT PHOENIX O WEST PHOENIX GILA BEND 1 As of December 31,2021 Utah FLAGSTAFF WINSLOW OCOTILLO SUNDANCE CASA GRANDE SAGUARO GLOBE TUCSON NOGALES HOLBROOK CHOLLA DOUGLAS Colorado FARMINGTON FOUR CORNERS New Mexico Key Facts as of Dec. 31, 2021 Consolidated assets Revenues Market cap Generating capacity owned or leased year end Customers - Current % from clean energy Nuclear plant in U.S. $22B $3.8B ~$8B ~6.3 GW 1.3M ~50% Largest PINNACLE WEST CAPITAL CORPORATION

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