Form 4 Filing for John Kenneweg - 908 Devices Inc.

On April 28, 2026, John Kenneweg, SVP of Sales & Product Marketing at 908 Devices Inc. (MASS), acquired 26,042 Performance Stock Units (PSUs) with a transaction value of $0.00. These PSUs represent a contingent right to receive one share of Common Stock upon vesting. The compensation committee certified the achievement of performance metrics on April 28, 2026, and the PSUs are set to vest on May 1, 2026. Following this transaction, Kenneweg holds 26,042 shares of underlying Common Stock. The filing, marked as Form 4, indicates a change in beneficial ownership.