The April sale marks Mueller’s second disposition in as many months, while a fractional share redemption slightly reduced his overall common stock holdings.

April 20, 2026

SmartStop Self Storage REIT Inc. (SMA) director David J. Mueller sold 425 shares of common stock on April 16, 2026, at a price of $31.78 per share, according to a statement of changes in beneficial ownership submitted to the U.S. Securities and Exchange Commission.

The transaction, valued at roughly $13,507, was executed under the same Rule 10b5-1 trading plan Mueller adopted on December 15, 2025. As previously reported, Mueller carried out an identical 425-share sale in mid-March at $32.81 per share. The latest sale was completed at a modestly lower price, reflecting a decline of approximately $1.03 per share between the two transactions.

Holdings After the Sale

Following the April sale, Mueller directly holds 6,340 shares of SmartStop common stock. That figure is slightly below the 6,765.87 shares reported after his March transaction, and the difference is not solely attributable to the 425 shares sold. The company redeemed 0.87 fractional shares in connection with a fractional share redemption conducted with respect to its outstanding common stock as of July 30, 2025, accounting for the additional small reduction in Mueller’s holdings.

LTIP Unit Holdings Unchanged

Mueller continues to hold two tranches of long-term incentive plan units, or LTIP Units, through SmartStop OP, L.P., the company’s operating partnership. The first tranche totals 7,234.25 LTIP Units tied to his reelection to the board, vesting one year from each reelection date. The second tranche consists of 9,598 LTIP Units that vest ratably over four years from the first anniversary of issuance, contingent upon Mueller’s continued board service.

Once vested, LTIP Units can be converted into common units of the operating partnership, which are then redeemable for either shares of SmartStop common stock on a one-for-one basis or the equivalent cash value, at the company’s discretion.

Additional Details

Mueller, based in Ladera Ranch, California, serves as a director of the self-storage REIT. The statement did not indicate any change to his role with the company.