SEC Form 4

FORM 4		UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934 or Section 30(h) of the Investment Company Act of 1940	OMB APPROVAL OMB Number: 3235-0287 Estimated average burden hours per response: 0.5
	Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).
	Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

1. Name and Address of Reporting Person* Mathews Paula M. (Last) (First) (Middle) 10 TERRACE ROAD (Street) LADERA RANCH CA 92694 (City) (State) (Zip)	2. Issuer Name and Ticker or Trading Symbol SmartStop Self Storage REIT, Inc. [ SMA ]	5. Relationship of Reporting Person(s) to Issuer (Check all applicable) X Director 10% Owner Officer (give title below) Other (specify below)
	3. Date of Earliest Transaction (Month/Day/Year) 04/01/2025
	4. If Amendment, Date of Original Filed (Month/Day/Year)	6. Individual or Joint/Group Filing (Check Applicable Line) X Form filed by One Reporting Person Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
			Code	V	Amount	(A) or (D)	Price
Class A Common Stock								7,176.45(1)(2)	I	Held by Paula M. Mathews Living Trust

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares
Long-Term Incentive Plan Units(3)	$0(3)	04/01/2025		A		7,678		(4)	(4)	Class A Common Stock	7,678	$0	7,678	I	Held by Paula M. Mathews Living Trust
Long-Term Incentive Plan Units(3)	$0(3)	04/02/2025		A		1,920		(5)	(5)	Class A Common Stock	1,920	$0	1,920	I	Held by Paula M. Mathews Living Trust
Long-Term Incentive Plan Units(3)	$0(3)							(6)	(6)	Class A Common Stock	4,420.25		4,420.25(2)(6)	I	Held by Paula M. Mathews Living Trust
Class A-1 Units(7)	$0(7)							(7)	(7)	Class A Common Stock	27,168		27,168(2)(8)	D

Explanation of Responses:

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

2. 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.

3. 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.

4. 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.

5. 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.

6. 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.

7. 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.

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

	/s/ Paula M. Mathews	04/03/2025
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
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