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Investor Presentaiton

A clear plan for clean energy transition. Progress Towards Meeting Clean Energy Commitment¹ Announced seasonal operations of Four Corners beginning 2023 Contracted for nearly 1600 MW of clean energy and storage to be in service for APS customers by end of 2024 Charted course for healthy mix of APS-owned and third party- owned assets, to be continued through future planned RFPs Pathway 2005 2019 2030 24% 50% 65% 15 1 Since January 2020 2050 100% PINNACLE WEST CAPITAL CORPORATION

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