Form 4 Filing for 908 Devices Inc. - Officer/Director Transaction

Christopher D. Brown, a director at 908 Devices Inc. (MASS), reported the disposition of 30,000 shares of Common Stock on May 28, 2026. The transaction, executed under a Rule 10b5-1 trading plan, occurred at a price of $9.00 per share. Following this transaction, Mr. Brown holds 895,559 shares of the company's stock. The filing, dated May 29, 2026, was signed by Mark S. Levine as Attorney-in-Fact. This event is classified as an OFFICER_DIRECTOR_CHANGE due to the reported transaction by a director.