Tamara D. Fischer - 28 Feb 2025 Form 4 Insider Report for National Storage Affiliates Trust (NSA)

Footnote F1

Pursuant to the agreement of limited partnership (the "Partnership Agreement") of NSA OP, LP (the "Partnership"), the Reporting Person has the right to cause the Partnership to redeem all or a portion of the Reporting Person's Class A common units of limited partner interest ("Class A OP Units") for cash in an amount equal to the market value of an equivalent number of the common shares of beneficial interest ("Shares") of National Storage Affiliates Trust (the "Issuer"), or at the Issuer's option, Shares on a one-for-one basis, subject to certain adjustments.

Footnote F2

The Class A OP Units in the first row of this table are comprised of 35,359 Class A OP Units issuable upon the conversion of 35,359 unvested long-term incentive plan units ("LTIP Units") in the Partnership which were granted to the Reporting Person pursuant to a 2025 LTIP Unit Award Agreement between the Issuer and the Reporting Person under the Issuer's 2024 Equity Incentive Plan. Of these, 9,924 vest in three annual installments on January 1, 2026, January 1, 2027, and January 1, 2028, subject to continued employment by the Reporting Person and 25,435 represent the maximum amount of LTIP Units that can vest on January 1, 2028 contingent upon the achievement of certain performance criteria.

Footnote F3

The Reporting Person will not earn any of the 25,435 performance-based LTIP Units if the minimum performance criteria is not met. The 25,435 performance-based LTIP Units are being reported here for informational purposes only. Vested LTIP Units, after achieving parity with Class A OP Units, are eligible to be converted into Class A OP Units on a one-for-one basis upon the satisfaction of conditions set forth in the Partnership Agreement.

Footnote F4

N/A

Footnote F5

The Reporting Person's total direct and indirect beneficial ownership of Class A OP Units following the reported transactions above (including the LTIP Units conversion described in footnote 8 below) is 575,004 Class A OP Units, which includes those Class A OP Units previously reported and the Class A OP Units reported herein (together with those securities convertible into, or exchangeable for, such Class A OP Units as specified therein). Excludes 40,641 previously reported LTIP Units granted on March 15, 2022 pursuant to a 2022 LTIP Unit Agreement, which did not vest upon the expiration of the performance period on January 1, 2025. All of the Reporting Person's 575,004 Class A OP Units are held directly through Tamara D. Fischer, trustee of the Tamara Diane Fischer Trust dated 01/20/2021.

Footnote F6

This filing shall not be deemed to be an admission that the Reporting Person is the beneficial owner of any of the securities reported herein, and the Reporting Person disclaims beneficial ownership of such securities except to the extent of the Reporting Person's pecuniary interest therein.

Footnote F7

Pursuant to the Partnership Agreement, upon the achievement of certain conditions, a holder of LTIP Units of the Partnership is entitled to convert such LTIP Units into Class A OP Units of the Partnership on a one-for-one basis.

Footnote F8

Consists of 6,645 LTIP Units held by the Reporting Person which were converted into 6,645 Class A OP Units as described in footnote 7 above.

Footnote F9

Following the reported transactions, the Reporting Person has total direct beneficial ownership in 15,611 vested LTIP Units and 110,887 unvested LTIP Units. The Reporting Person previously reported the 6,645 LTIP Units that were converted into Class A OP Units as described in this Form 4 as Class A OP Units on an as-converted basis. Accordingly, rows 2 and 3 of this Form 4 are being filed on a voluntary basis solely to provide notice of the conversion of the Reporting Person's 6,645 LTIP Units into 6,645 Class A OP Units.