PSA: Material agreement · Acquisition or asset disposal · New financial obligation · Unregistered securities sale · Company disclosure

Item 1.01 Entry into a Material Definitive Agreement. On July 21, 2026, PSA OP entered into an amendment (the “PSA OP Agreement Amendment”) to its Amended and Restated Agreement of Limited Partnership to designate the terms of the 6.000% Series T Cumulative Redeemable Preferred Units of PSA OP (the “PSA OP Series T Preferred Units”) and the 6.000% Series U Cumulative Redeemable Preferred Units of PSA OP (the “PSA OP Series U Preferred Units”) that were issued to Public Storage in connection with the issuance by Public Storage of Public Storage Series T Preferred Shares and Public Storage Series U Preferred Shares. The PSA OP Series T Preferred Units and the PSA OP Series U Preferred Units, which pursuant to the Partnership Merger were issued at the Partnership Merger Effective Time upon conversion of NSA OP’s 6.000% Series A Cumulative Redeemable Preferred Units (“NSA OP Series A Preferred Units”) and NSA OP’s Series B Cumulative Redeemable Preferred Units (“NSA OP Series B Preferred Units”), have rights, preferences, privileges and voting powers that are materially unchanged from those of the NSA OP Series A Preferred Units and NSA OP Series B Preferred Units. The PSA OP Agreement Amendment also designates the terms of the 6.000% Series T-1 Cumulative Redeemable Preferred Units of PSA OP (the “PSA OP Series T-1 Preferred Units” and, together with the PSA OP Series T Preferred Units and the PSA OP Series U Preferred Units, the “PSA OP Preferred Units”) that were issued to holders of NSA OP’s 6.000% Series A-1 Cumulative Redeemable Preferred Units (“NSA OP Series A-1 Preferred Units” and, together with the NSA OP Series A Preferred Units and the NSA OP Series B Preferred Units, the “NSA OP Preferred Units”) in the Partnership Merger. The rights, preferences, privileges a