Form 4 Filing for Anthony Hunt

This filing details transactions made by Anthony Hunt, a director at 908 Devices Inc. On June 10, 2026, Hunt acquired 14,083 shares of Common Stock via a non-derivative transaction coded as "M". Concurrently, Hunt disposed of 14,083 Restricted Stock Units (RSUs) that vested on the same day, as indicated by footnote F2. On June 11, 2026, Hunt acquired 13,656 RSUs, which will vest on June 11, 2027, or the day prior to the 2027 Annual Meeting, subject to continued service, as per footnote F3. Additionally, on June 11, 2026, Hunt acquired a stock option to purchase 6,209 shares of Common Stock, with vesting occurring in monthly installments over 12 months starting from June 11, 2026, as noted in footnote F4. The filing also includes a Power of Attorney granted by Anthony Hunt to representatives of 908 Devices Inc. for executing SEC filings.