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

Reporting relationship: Director
Issuer ticker: SMA
Reported as of: 16 Jul 2026
Net transaction value: -$14,186
SEC form: 4
Accepted by SEC: 16 Jul 2026, 17:14:14 UTC
Prior SEC filing: 25 Jun 2026
Source filing: View source filing
Reporting owner signature: /s/ David J. Mueller

Key filing fact

David J. Mueller filed Form 4 for SmartStop Self Storage REIT, Inc. (SMA) on 16 Jul 2026.

Key facts

This page summarizes David J. Mueller's Form 4 filing for SmartStop Self Storage REIT, Inc. (SMA).
1 reported transaction and 2 derivative rows are listed below.
Accepted by SEC: 16 Jul 2026, 17:14.

Change

Previous filing in this sequence was filed on 25 Jun 2026.
Current net transaction value: -$14,186.

Research use

This tells you what this filing adds before you inspect full transaction and derivative tables.
You can trace every row back to the original SEC filing document.

Evidence

Filed on Form 4

Ownership activity is grounded in SEC Form 4 disclosures.

View source filing

Reporting Owners (1)

CIK 0001672825 Primary reporting owner

Mueller David J

Relationship: Director
Address: 10 TERRACE ROAD, LADERA RANCH
Signature: /s/ David J. Mueller
Signature date: 16 Jul 2026

Reported non-derivative transactions

Shares, units, or other non-derivative securities reported in this filing.

SMA transaction

Common Stock

Sale

Transaction value: $14,186
Shares: -425
Change %: -7.7%
Price: $33.38
Shares after: 5,065
Date: 16 Jul 2026
Ownership: Direct
Footnotes: F1

Reported derivative securities

Options, warrants, convertible securities, or similar derivative positions disclosed in the filing.

SMA holding Derivative

Long-Term Incentive Plan Units

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after: 10,464
Date: 16 Jul 2026
Ownership: Direct
Underlying class: Common Stock
Underlying amount: 10,464
Exercise price: $0.000000
Footnotes: F2, F3

SMA holding Derivative

Long-Term Incentive Plan Units

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after: 9,598
Date: 16 Jul 2026
Ownership: Direct
Underlying class: Common Stock
Underlying amount: 9,598
Exercise price: $0.000000
Footnotes: F2, F4

^* marks a reported price that did not pass the local price check.

Additional SEC filing notes

Filing notes and footnotes

Rule 10b5-1 trading plan

These transactions were reported as open-market trades under a Rule 10b5-1 plan. The plan lets an insider set trading instructions in advance, which can reduce the risk of trading while in possession of material nonpublic information.

Original filing language: transaction made pursuant to a contract, instruction, or written plan intended to satisfy Rule 10b5-1(c).

Explanation of responses 4 footnotes

Footnote 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.

Footnote 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.

Footnote F3

Represents 10,464.25 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.

Footnote 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.