X0306 4 2023-03-02 0 0001585389 SmartStop Self Storage REIT, Inc. n/a 0001781289 Valle Gerald 10 TERRACE ROAD LADERA RANCH CA 92694 0 1 0 0 SVP, Self-Storage Operations Class A Common Stock 7035.65 D Long-Term Incentive Plan Units 0 Class A Common Stock 26590.61 26590.61 D Long-Term Incentive Plan Units 0 2023-03-02 4 A 0 4125.4 0 A Class A Common Stock 4125.4 19571.37 D Represents 7,035.65 shares of restricted stock previously reported as being owned by the Reporting Person. 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 Class A common units of the Operating Partnership ("Class A Common Units"). Class A Common Units are redeemable by the holder for, at the election of the Issuer, shares of Class A Common Stock of the Issuer on a one-for-one basis or the cash value of such shares. Represents 26,590.61 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 LTIP Units previously reported as being owned by the Reporting Person, which LTIP Units were subject to vesting based on the achievement of specified performance measures. The actual number of LTIP Units to be issued upon vesting could range from 0% to 100% of the number of LTIP Units reported based on the actual performance measure achieved. On March 2, 2023, the Compensation Committee of the Issuer's Board of Directors determined that a performance measure had been achieved such that 100% of the number of LTIP Units previously reported should vest. Accordingly, on March 2, 2023, 4,125.4 LTIP Units previously reported as being owned by the Reporting Person vested. /s/ Gerald Valle 2023-03-06