SmartStop Self Storage REIT, Inc. — Director's Dealing 2025

Apr 4, 2025

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: SmartStop Self Storage REIT, Inc. (SMA)
CIK: 0001585389
Period of Report: 2025-04-01

Reporting Person: Mathews Paula M. (Director)

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2025-04-01	Long-Term Incentive Plan Units	$0	A	7678	Acquired		Class A Common Stock (7678)	Indirect
2025-04-02	Long-Term Incentive Plan Units	$0	A	1920	Acquired		Class A Common Stock (1920)	Indirect

Holdings (Non-Derivative)

Security	Shares	Ownership
Class A Common Stock	7176.45	Indirect

Holdings (Derivative)

Security	Exercise Price	Expiration	Underlying	Shares	Ownership
Long-Term Incentive Plan Units	$0		Class A Common Stock (4420.25)	4420.25	Indirect
Class A-1 Units	$0		Class A Common Stock (27168)	27168	Direct

Footnotes

F1: Represents 7,176.45 shares of Class A Common Stock previously reported as being owned by the Reporting Person.

F2: Includes securities previously reported as being owned by the Reporting Person adjusted for the one-for-four reverse stock split of the Issuer's issued and outstanding shares of Class A Common Stock and the one-for-four reverse unit split of the Operating Partnership's (as defined below) issued and outstanding partnership units (collectively, the "Reverse Equity Splits"). As a result of the Reverse Equity Splits, every four shares of the Issuer's Class A Common Stock and every four of the Operating Partnership's partnership units were automatically changed into one issued and outstanding share of Class A Common Stock or partnership units, as applicable, rounded to the nearest 1/1000th share or partnership unit.

F3: 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 the Issuer's Class A Common Stock on a one-for-one basis or the cash value of such shares.

F4: Represents 7,678 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 employment or service through each vesting date.

F5: Represents 1,920 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 employment or service through each vesting date.

F6: Represents 4,420.25 LTIP Units previously reported as being owned by the Reporting Person. The LTIP Units were issued to the Reporting Person in connection with her reelection to the board of directors and vest one year from each such reelection.

F7: 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 Class A Common Stock of the Issuer on a one-for-one basis or the cash value of such shares.

F8: Represents 27,168 Class A-1 Units previously reported as being owned by the Reporting Person.