X0609 4 2026-06-23 0 0001585389 SmartStop Self Storage REIT, Inc. SMA 0001462183 Morris Timothy S. false 10 TERRACE ROAD LADERA RANCH CA 92694 1 0 0 0 0 Common Stock 2026-06-23 4 A 0 3075 0 A 18253 D Common Stock 9166 D The Reporting Person was awarded 3,075 shares of restricted Common Stock upon his reelection to the board of directors, which shares vest one year from such reelection. Includes shares of Common Stock previously reported as being owned by the Reporting Person, less 0.9 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 9,166 shares of restricted Common Stock previously reported as being owned by the Reporting Person, which shares 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/ Timothy S. Morris 2026-06-25