Mueller David J 4

4 · SmartStop Self Storage REIT, Inc. · Filed Mar 17, 2026

AI-generated summary of this filing

Updated Mar 17, 2026

SmartStop (SMA) Director David J. Mueller Sells 425 Shares

What Happened

David J. Mueller, a director of SmartStop Self Storage REIT, sold 425 shares of the company's common stock on March 16, 2026, at $32.81 per share for total proceeds of about $13,944. This was a sale (not a purchase) and is often a routine disposition rather than a signal of company outlook.

Key Details

Transaction date and price: 2026-03-16 — 425 shares sold at $32.81 per share.
Total value: Approximately $13,944.
Shares owned after transaction: Not specified in the provided filing excerpt.
Filing timeliness: Form 4 filed on 2026-03-17 (appears timely).
Notable footnote: The sale was effected pursuant to a Rule 10b5-1 trading plan adopted by Mueller on December 15, 2025 (Footnote F1).

Context

The filing also references LTIP Units of the operating partnership (Footnotes F2–F4). Vested LTIP Units convert into common units which may be redeemable for SmartStop common stock or cash. The filer previously reported owning 7,234.25 LTIP Units (F3) and 9,598 LTIP Units (F4) — totaling 16,832.25 LTIP Units — which have varying vesting schedules. These details describe long-term incentive holdings and vesting, not an immediate market purchase or sale.

Form 4

Period: 2026-03-16

Director

Transactions

Holdings

Long-Term Incentive Plan Units
[F2][F3]
Exercise: $0.00→ Common Stock (7,234.25 underlying)
7,234.25
Long-Term Incentive Plan Units
[F2][F4]
Exercise: $0.00→ Common Stock (9,598 underlying)
9,598

Footnotes (4)

[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.

Signature

/s/ David J. Mueller|2026-03-16

1 file