Form 4 Filing for 908 Devices Inc. - Insider Transactions

This filing details transactions by Brandi C. Vann, a director at 908 Devices Inc., on June 11, 2026. Vann acquired 13,656 Restricted Stock Units (RSUs) with no cost, each representing one share of Common Stock upon vesting. Additionally, Vann was granted stock options to acquire 6,209 shares of Common Stock at an exercise price of $8.22. The RSUs vest on June 11, 2027, or the day before the 2027 Annual Meeting, subject to continued service. The stock options vest monthly over 12 months starting June 11, 2026, also contingent on continued service. The filing also includes a Power of Attorney document authorizing representatives to execute insider trading forms on behalf of the reporting person.