X0508 4 2025-11-17 0 0001585389 SmartStop Self Storage REIT, Inc. SMA 0001462216 Schwartz H. Michael 10 TERRACE ROAD LADERA RANCH CA 92694 1 1 0 0 Chief Executive Officer 0 Common Stock 2025-11-17 4 P 0 6250 31.71 A 24250 I See Footnote 1. Common Stock 120805 I See Footnote 2. Common Stock 29315 I Through Schwartz Family Trust dated September 22, 2003 Common Units 0 Common Stock 29.11 29.11 I Through Schwartz Family Trust dated September 22, 2003 Common Units 0 Common Stock 96543.26 96543.26 I See Footnote 5. Long-Term Incentive Plan Units 0 Common Stock 233791.29 233791.29 I Through Schwartz Family Trust dated September 22, 2003 Long-Term Incentive Plan Units 0 Common Stock 192600.19 192600.19 I Through Schwartz Family Trust dated September 22, 2003 Class A-1 Units 0 Common Stock 2397695.44 2397695.44 I See Footnote 10. Represents 24,250 shares of common stock indirectly owned by the Reporting Person through Churchill TRI LLC, a Nevada limited liability company, which is 50% owned by The H. Michael Schwartz 2011 Irrevocable Trust and 50% owned by The Holly Breaux Schwartz 2011 Irrevocable Trust. Represents 120,805 shares of Common Stock owned by SmartStop OP Holdings, LLC ("SOH") previously reported as being owned by the Reporting Person, which amount accounts for the redemption of .97 shares of Common Stock previously reported as being owned by the Reporting Person 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. SOH is indirectly owned and controlled by the Reporting Person. Represents 29,315 shares of Common Stock previously reported as being owned by the Reporting Person, which amount accounts for the redemption of .15 shares of Common Stock previously reported as being owned by the Reporting Person 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 common units ("Common Units") of SmartStop OP, L.P., the Issuer's operating partnership (the "Operating Partnership"). Common Units are redeemable by the holder for, at the election of the Issuer, shares of Common Stock of the Issuer on a one-for-one basis or the cash value of such shares. Represents 96,543.26 Common Units owned by SOH previously reported as being owned by the Reporting Person. Represents long-term incentive plan units ("LTIP Units") of the Operating Partnership. Vested LTIP Units are convertible into Common Units. Represents 233,791.29 LTIP Units previously reported as being owned by the Reporting Person. The LTIP Units vest ratably over a four-year period commencing on December 31 of the year of grant, subject to the Reporting Person's continued employment or service through each vesting date. Represents 192,600.19 LTIP Units previously reported as being owned by the Reporting Person, which number is equal to 200% of the target number of LTIP Units to be issued upon vesting. The actual number of LTIP Units to be issued upon vesting can range from 0% to 100% of the number of LTIP Units reported, based on achievement of specified performance measures. Represents Class A-1 limited partnership units ("Class A-1 Units") of the Operating Partnership. Class A-1 Units are redeemable by the holder for, at the election of the Issuer, shares of Common Stock of the Issuer on a one-for-one basis or the cash value of such shares. Represents 2,397,695.44 Class A-1 Units owned by SOH previously reported as being owned by the Reporting Person. /s/ H. Michael Schwartz 2025-11-18