X0609 4 2026-06-23 0 0001585389 SmartStop Self Storage REIT, Inc. SMA 0001462184 Perry Harold false 10 TERRACE ROAD LADERA RANCH CA 92694 1 0 0 0 0 Common Stock 12657 D Long-Term Incentive Plan Units 0 2026-06-23 4 A 0 3230 0 A Common Stock 3230 9024.25 D Long-Term Incentive Plan Units 0 Common Stock 9598 9598 D Represents 12,657 shares of Common Stock previously reported as being owned by the Reporting Person, less 0.19 shares of Common Stock that were redeemed by the Issuer in connection with a fractional share redemption conducted by the Issuer with respect to its outstanding Common Stock as of July 30, 2025. Represents long-term incentive plan units ("LTIP Units") of SmartStop OP, L.P., the Issuer's operating partnership (the "Operating Partnership"). Vested LTIP Units are convertible into common units of the Operating Partnership ("Common Units"). Common Units are redeemable by the holder for, at the election of the Issuer, shares of the Issuer's Common Stock on a one-for-one basis or the cash value of such shares. The Reporting Person was awarded 3,230 LTIP Units upon his reelection to the board of directors, which LTIP Units vest one year from such reelection. Represents 9,598 LTIP Units issued to the Reporting Person pursuant to the Issuer's incentive plan, which LTIP Units vest ratably over four years commencing on the first anniversary of the issuance thereof, subject to the Reporting Person's continued service through each vesting date. /s/ Harold Perry 2026-06-25