[Form 4] SmartStop Self Storage REIT, Inc. Insider Trading Activity

Rhea-AI Filing Summary

SmartStop Self Storage REIT director Paula M. Mathews received new equity awards and reported current holdings in a Form 4 filing. Key transactions and positions include:

• Awarded 2,814 LTIP Units on June 24, 2025, which vest one year after her board reelection
• Currently holds 9,598 LTIP Units that vest over four years
• Maintains 7,176.45 shares of Class A Common Stock through the Paula M. Mathews Living Trust
• Directly owns 27,168 Class A-1 Units of the operating partnership

LTIP Units and Class A-1 Units are convertible/redeemable for Class A Common Stock on a one-for-one basis or cash equivalent at the issuer's election. This grant appears to be part of standard director compensation following reelection to the board.

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
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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)
06/24/2025

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)	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(2)	$0(2)	06/24/2025		A		2,814(3)		(3)	(3)	Class A Common Stock	2,814	$0	7,234.25	I	Held by Paula M. Mathews Living Trust
Long-Term Incentive Plan Units(2)	$0(2)							(4)	(4)	Class A Common Stock	9,598		9,598(4)	I	Held by Paula M. Mathews Living Trust
Class A-1 Units(5)	$0(5)							(5)	(5)	Class A Common Stock	27,168		27,168(6)	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. 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.

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

4. 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.

5. 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.

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

	/s/ Paula M. Mathews	06/26/2025
	** 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).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.

FAQ

How many LTIP Units did Paula Mathews receive from SmartStop Self Storage REIT (SMA) in June 2025?

Paula Mathews received 2,814 LTIP Units from SmartStop Self Storage REIT (SMA) on June 24, 2025, upon her reelection to the board of directors. These LTIP Units will vest one year from her reelection date.

What is Paula Mathews' total ownership of SMA Class A Common Stock as of June 2025?

Paula Mathews beneficially owns 7,176.45 shares of Class A Common Stock held indirectly through the Paula M. Mathews Living Trust.

How many unvested LTIP Units does Paula Mathews hold in SMA?

Paula Mathews holds 9,598 previously awarded LTIP Units that vest ratably over four years from their issuance date, plus the newly awarded 2,814 LTIP Units that vest in one year, for a total of 12,412 unvested LTIP Units.

What is Paula Mathews' position at SmartStop Self Storage REIT (SMA)?

Paula Mathews serves as a Director on the board of SmartStop Self Storage REIT (SMA), as indicated by the 'X' marked under the Director relationship field in the Form 4 filing.

How many Class A-1 Units of SMA's Operating Partnership does Paula Mathews own?

Paula Mathews directly owns 27,168 Class A-1 Units of SmartStop OP, L.P. (the Operating Partnership), which are redeemable for either shares of Class A Common Stock on a one-for-one basis or their cash value, at the Issuer's election.