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

Jun 26, 2025

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: SmartStop Self Storage REIT, Inc. (SMA)
CIK: 0001585389
Period of Report: 2025-06-24

Reporting Person: Mueller David J (Director)

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2025-06-24	Long-Term Incentive Plan Units	$0	A	2814	Acquired		Class A Common Stock (2814)	Direct

Holdings (Non-Derivative)

Security	Shares	Ownership
Class A Common Stock	7190.87	Direct

Holdings (Derivative)

Security	Exercise Price	Expiration	Underlying	Shares	Ownership
Long-Term Incentive Plan Units	$0		Class A Common Stock (9598)	9598	Direct

Footnotes

F1: Represents 7,190.87 shares of Class A Common Stock previously reported as being owned by the Reporting Person.

F2: 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.

F3: The Reporting Person was awarded 2,814 LTIP Units upon his reelection to the board of directors, which LTIP Units vest one year from such reelection.

F4: Represents 9,598 LTIP Units previously reported as being owned by the Reporting Person, 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.