SVP John Kenneweg's Performance Stock Units Vesting and Tax Withholding Sale at 908 Devices Inc.

This SEC Form 4 filing reports that John Kenneweg, SVP of Sales & Product Marketing at 908 Devices Inc. (MASS), had 26,042 performance stock units (PSUs) vest on May 1, 2026. Upon vesting, these PSUs converted to common stock shares. To cover tax withholding obligations, Kenneweg sold 7,787 shares at $6.83 per share through a mandatory "sell to cover" transaction as required by the company's policy. This was not a discretionary sale by the executive. Following these transactions, Kenneweg's total common stock holdings increased from 57,785 shares to 76,039 shares. The PSUs had no expiration date and represented a contingent right to receive one share of common stock each when vested.