Certain Common Stock of Pinnacle West Capital Corporation are subject to a Lock-Up Agreement Ending on 29-APR-2024. These Common Stock will be under lockup for 61 days starting from 28-FEB-2024 to 29-APR-2024.

Details:
The directors and executive officers (such persons, the ?lock-up parties?) have entered into lock-up agreements with the underwriters prior to the commencement of this offering pursuant to which each lock-up party, with limited exceptions, for a period of 60 days after the date of this prospectus supplement (such period, the ?lock-up period?), may not, without the prior written consent of Barclays Capital Inc., Citigroup Global Markets Inc., Mizuho Securities USA LLC and Wells Fargo Securities, LLC, offer, sell, contract to sell, pledge or otherwise dispose of, directly or indirectly, any shares of common stock or securities convertible into or exchangeable or exercisable for any shares of our common stock, enter into a transaction that would have the same effect, or enter into any swap, hedge or other arrangement that transfers, in whole or in part, any of the economic consequences of ownership of shares of our common stock, whether any such aforementioned transaction is to be settled by delivery of shares of common stock or such other securities, in cash or otherwise, or publicly disclose the intention to make any such offer, sale, pledge or disposition, or to enter into any such transaction, swap, hedge or other arrangement.