David J. Mueller - 16 Mar 2026 Form 4 Insider Report for SmartStop Self Storage REIT, Inc. (SMA)

Role
Director
Signature
/s/ David J. Mueller
Issuer symbol
SMA
Transactions as of
16 Mar 2026
Net transactions value
-$13,944
Form type
4
Filing time
17 Mar 2026, 16:25:14 UTC
Previous filing
26 Jun 2025
SEC
View on sec.gov

Reporting Owners (1)

Name Relationship Address Signature Signature date CIK
Mueller David J Director 10 TERRACE ROAD, LADERA RANCH /s/ David J. Mueller 16 Mar 2026 0001672825

Transactions Table

Type Sym Class Transaction Value $ Shares Change % * Price $ Shares After Date Ownership Footnotes
transaction SMA Common Stock Sale $13,944 -425 -5.9% $32.81 6,766 16 Mar 2026 Direct F1

Derivative Securities (e.g., puts, calls, warrants, options, convertible securities)

Type Sym Class Transaction Value $ Shares Change % * Price $ Shares After Date Underlying Class Amount Exercise Price Ownership Footnotes
holding SMA Long-Term Incentive Plan Units 7,234 16 Mar 2026 Common Stock 7,234 $0.000000 Direct F2, F3
holding SMA Long-Term Incentive Plan Units 9,598 16 Mar 2026 Common Stock 9,598 $0.000000 Direct F2, F4
* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Buy Plan / Sale Plan: These are also open market purchases/sales of shares, but in this case the transaction is part of a trading plan. Rule 10b5-1 allows insiders to setup a trading plan to buy/sell stocks over a certain period of time. Since the purchases/sales are predetermined, this protects the insiders from violating insider trading law.

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).

Explanation of Responses:

Id Content
F1 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.
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 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.
F3 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.
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.