X0508 4 2024-02-01 false 0001555279 908 Devices Inc. MASS 0001836523 Knopp Kevin J. C/O 908 DEVICES INC. 645 SUMMER STREET BOSTON MA 02210 true true false false President and CEO false Common Stock 2024-02-01 4 M false 11255.00 A 407603.00 D Common Stock 2024-02-01 4 M false 13449.00 A 421052.00 D Common Stock 2024-02-01 4 S false 4099.00 6.9716 D 416953.00 D Common Stock 2024-02-01 4 S false 4972.00 7.0161 D 411981.00 D Common Stock 541223.00 I See Footnote Restricted Stock Units 2024-02-01 4 M false 11255.00 0.00 D Common Stock 11255.00 22509.00 D Restricted Stock Units 2024-02-01 4 M false 13449.00 0.00 D Common Stock 13449.00 40345.00 D Each Restricted Stock Unit ("RSU") represents a contingent right to receive, at settlement, one share of Common Stock. This transaction represents the settlement of RSUs in shares of Common Stock on their scheduled vesting date. The sale reported on this Form 4 represents shares sold by the Reporting Person to cover tax withholding obligations in connection with the vesting and settlement of RSUs. The sale is mandated by the Issuer's election to require the satisfaction of tax withholding obligations to be funded by a "sell to cover" transaction and does not represent a discretionary transaction by the Reporting Person. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $6.93 to $7.06, inclusive. The reporting person undertakes to provide to 908 Devices Inc., any security holder of 908 Devices Inc., or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in this footnote. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $6.96 to $7.13, inclusive. The reporting person undertakes to provide to 908 Devices Inc., any security holder of 908 Devices Inc., or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in this footnote. The shares are owned directly by The Kevin J. Knopp Irrevocable Trust of 2018. The reporting person's brother-in-law is the trustee of The Kevin J. Knopp Irrevocable Trust of 2018 and has sole voting and dispositive control with respect to all securities held by such trust. The reporting person may be deemed to be the beneficial owner of the securities held by The Kevin J. Knopp Irrevocable Trust of 2018. These RSUs vest in four substantially equal annual installments at the four anniversary dates following February 1, 2022, subject to the reporting person's continued service through the applicable vesting date. The RSUs have no expiration date. These RSUs vest in four substantially equal annual installments at the four anniversary dates following February 1, 2023, subject to the reporting person's continued service through the applicable vesting date. The RSUs have no expiration date. /s/ Michael S. Turner, as Attorney-in-Fact 2024-02-02