STOCK TITAN

Director Mueller sells 425 SmartStop (SMA) shares under 10b5-1 plan

Filing Impact
(Neutral)
Filing Sentiment
(Negative)
Form Type
4

Rhea-AI Filing Summary

SmartStop Self Storage REIT, Inc. director David J. Mueller reported an open-market sale of 425 shares of Common Stock at $31.78 per share on April 16, 2026, under a pre-arranged Rule 10b5-1 trading plan adopted on December 15, 2025.

After this sale, he directly holds 6,340 Common shares. He also holds long-term incentive plan units that are convertible into Operating Partnership common units, which are redeemable for either cash or shares of the company’s Common Stock on a one-for-one basis, with vesting tied to his board service.

Positive

  • None.

Negative

  • None.
Insider Mueller David J
Role Director
Sold 425 shs ($14K)
Type Security Shares Price Value
Sale Common Stock 425 $31.78 $14K
holding Long-Term Incentive Plan Units -- -- --
holding Long-Term Incentive Plan Units -- -- --
Holdings After Transaction: Common Stock — 6,340 shares (Direct); Long-Term Incentive Plan Units — 7,234.25 shares (Direct)
Footnotes (1)
  1. The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on December 15, 2025. Includes shares of Common Stock previously reported as being owned by the Reporting Person, less 0.87 shares of Common Stock that were redeemed by the Issuer in connection with a fractional share redemption conducted by the Issuer with respect to its outstanding Common Stock as of July 30, 2025. 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 common units of the Operating Partnership ("Common Units"). Common Units are redeemable by the holder for, at the election of the Issuer, shares of the Issuer's Common Stock on a one-for-one basis or the cash value of such shares. Represents 7,234.25 LTIP Units previously reported as being owned by the Reporting Person. The LTIP Units were issued to the Reporting Person in connection with his reelection to the board of directors and vest one year from each such reelection. 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.
Shares sold 425 shares Open-market sale of Common Stock on April 16, 2026
Sale price per share $31.78 per share Price received for the 425 Common shares sold
Common shares held after sale 6,340 shares Direct ownership of SmartStop Common Stock following the transaction
LTIP Units grant 1 underlying shares 7,234.25 underlying shares LTIP Units issued in connection with board reelection
LTIP Units grant 2 underlying shares 9,598 underlying shares LTIP Units vesting ratably over four years
Net buy/sell direction Net sell of 425 shares TransactionSummary across reported trades
Rule 10b5-1 trading plan financial
"The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person"
A Rule 10b5-1 trading plan is a pre-arranged schedule that allows company insiders to buy or sell stock at specific times, even if they have inside information. It helps prevent accusations of unfair trading by making these transactions look planned and transparent, rather than sneaky or illegal.
Long-Term Incentive Plan Units financial
"Represents long-term incentive plan units ("LTIP Units") of SmartStop OP, L.P., the Issuer's operating partnership"
Common Units financial
"Vested LTIP Units are convertible into common units of the Operating Partnership ("Common Units")"
Common units are the basic ownership stakes in a company, limited partnership, or trust that function like common stock: they give holders a claim on profits and often voting rights. Think of them as the ordinary seats at a table—the most directly affected by the business’s success or failure, so they typically offer higher upside but carry greater risk than preferred claims or creditors, which matters to investors evaluating potential return and safety.
fractional share redemption financial
"less 0.87 shares of Common Stock that were redeemed by the Issuer in connection with a fractional share redemption"
vesting financial
"LTIP Units vest ratably over four years commencing on the first anniversary of the issuance thereof"
Vesting is the process by which you earn full ownership of something, like company stock or a retirement benefit, over time. It’s like earning the right to keep a gift piece by piece the longer you stay with a company, making sure employees stay committed before they receive all the benefits.
SEC Form 4
FORM 4UNITED 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*
Mueller David J

(Last)(First)(Middle)
10 TERRACE ROAD

(Street)
LADERA RANCH CALIFORNIA 92694

(City)(State)(Zip)

UNITED STATES

(Country)
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)
XDirector10% Owner
Officer (give title below)Other (specify below)
2a. Foreign Trading Symbol
3. Date of Earliest Transaction (Month/Day/Year)
04/16/2026
6. Individual or Joint/Group Filing (Check Applicable Line)
XForm filed by One Reporting Person
Form filed by More than One Reporting Person
4. If Amendment, Date of Original Filed (Month/Day/Year)

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)
CodeVAmount(A) or (D)Price
Common Stock04/16/2026S(1)425D$31.786,340(2)D
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)
CodeV(A)(D)Date ExercisableExpiration DateTitleAmount or Number of Shares
Long-Term Incentive Plan Units(3)$0(3) (4) (4)Common Stock7,234.257,234.25(4)D
Long-Term Incentive Plan Units(3)$0(3) (5) (5)Common Stock9,5989,598(5)D
Explanation of Responses:
1. The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on December 15, 2025.
2. Includes shares of Common Stock previously reported as being owned by the Reporting Person, less 0.87 shares of Common Stock that were redeemed by the Issuer in connection with a fractional share redemption conducted by the Issuer with respect to its outstanding Common Stock as of July 30, 2025.
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 common units of the Operating Partnership ("Common Units"). Common Units are redeemable by the holder for, at the election of the Issuer, shares of the Issuer's Common Stock on a one-for-one basis or the cash value of such shares.
4. Represents 7,234.25 LTIP Units previously reported as being owned by the Reporting Person. The LTIP Units were issued to the Reporting Person in connection with his reelection to the board of directors and vest one year from each such reelection.
5. 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.
/s/ David J. Mueller04/17/2026
** Signature of Reporting PersonDate
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.
* Form 4: SEC 1474 (03-26)

FAQ

What insider transaction did David J. Mueller report at SmartStop Self Storage REIT (SMA)?

David J. Mueller reported selling 425 shares of SmartStop Self Storage REIT Common Stock. The shares were sold in an open-market transaction at $31.78 per share, and the activity was disclosed in a Form 4 insider trading report filed with regulators.

At what price did SmartStop Self Storage REIT (SMA) director Mueller sell his shares?

Mueller sold 425 SmartStop Self Storage REIT Common shares at $31.78 per share. This open-market sale on April 16, 2026, reflects a routine insider transaction and was executed under a pre-arranged Rule 10b5-1 trading plan adopted in December 2025.

How many SmartStop Self Storage REIT (SMA) shares does Mueller hold after the reported sale?

Following the sale, Mueller directly owns 6,340 shares of SmartStop Self Storage REIT Common Stock. In addition, he holds long-term incentive plan units that can ultimately be converted into Operating Partnership common units, which are redeemable for either company shares or cash on a one-for-one basis.

What are the Long-Term Incentive Plan Units held by Mueller at SmartStop Self Storage REIT (SMA)?

Mueller holds long-term incentive plan units of SmartStop OP, L.P., the company’s operating partnership. Vested LTIP Units convert into common units, which are redeemable for either SmartStop Common Stock on a one-for-one basis or the cash value of those shares, subject to vesting conditions.

Were Mueller’s SmartStop Self Storage REIT (SMA) share sales made under a Rule 10b5-1 plan?

Yes. The reported sales were effected under a Rule 10b5-1 trading plan adopted by Mueller on December 15, 2025. Such plans pre-schedule trades, helping separate routine liquidity or diversification transactions from discretionary market-timing decisions by insiders.

How do Mueller’s LTIP Units at SmartStop Self Storage REIT (SMA) vest over time?

One LTIP grant of 7,234.25 units was issued in connection with Mueller’s reelection to the board and vests one year from each such reelection. Another grant of 9,598 LTIP Units vests ratably over four years from its first anniversary, contingent on continued employment or service.