Director David J. Mueller of SmartStop Self Storage REIT, Inc. filed a Form 4 on August 18, 2026, reporting the sale of 425 shares of common stock on August 17, 2026, pursuant to a Rule 10b5-1 trading plan.

Key Highlights

  • Shares sold: David J. Mueller disposed of 425 shares of common stock on August 17, 2026, at a price of $33.70 per share.
  • Remaining direct ownership: Mueller beneficially owns 4,640 shares of common stock directly following the transaction.
  • 10b5-1 plan: The sale was effected pursuant to a Rule 10b5-1 trading plan adopted by Mueller on December 15, 2025.
  • LTIP Units - tranche one: Mueller holds 10,464.25 Long-Term Incentive Plan Units tied to board reelection, vesting one year from each reelection date.
  • LTIP Units - tranche two: Mueller holds an additional 9,598 LTIP Units vesting ratably over four years from the first anniversary of issuance, subject to continued service.
  • Reporting person role: Mueller is identified as a Director of SmartStop Self Storage REIT, Inc. (NYSE:SMA).

Mueller's Share Sale and LTIP Unit Holdings at SmartStop Self Storage REIT

According to the Form 4 filing, David J. Mueller, a director of SmartStop Self Storage REIT, Inc. (NYSE:SMA), sold 425 shares of the company's common stock on August 17, 2026, at $33.70 per share. The filing indicates the transaction code was "S" (a sale) and that the shares were disposed of directly. Following the transaction, Mueller directly holds 4,640 shares of common stock, as reported in the filing.

The filing discloses that the sale was carried out under a Rule 10b5-1 trading plan that Mueller adopted on December 15, 2025. In Table II, the filing reports two tranches of Long-Term Incentive Plan Units ("LTIP Units") held in SmartStop OP, L.P., the issuer's operating partnership. The first tranche consists of 10,464.25 LTIP Units issued in connection with Mueller's reelection to the board of directors, which vest one year from each such reelection. The second tranche consists of 9,598 LTIP Units that vest ratably over four years commencing on the first anniversary of issuance, subject to Mueller's continued employment or service through each vesting date.

The filing explains that vested LTIP Units are convertible into common units of the operating partnership, and those common units are redeemable by the holder for, at the election of the issuer, shares of common stock on a one-for-one basis or the cash value of such shares. Both LTIP Unit tranches carry a conversion or exercise price of $0, as noted in the filing, and are held directly by Mueller.

What Was Disclosed

The Form 4 filed August 18, 2026, reports a single sale of 425 shares of SmartStop Self Storage REIT common stock by director David J. Mueller at $33.70 per share on August 17, 2026, under a pre-established 10b5-1 plan, along with two tranches of LTIP Units totaling 20,062.25 units.