X0306 4 2022-06-15 false 0001555279 908 Devices Inc. MASS 0001431531 Griffith Joseph H. IV C/O 908 DEVICES INC. 645 SUMMER STREET BOSTON MA 02210 false true false false Chief Financial Officer Common Stock, par value $0.001 2022-06-15 4 M false 1000.00 0.96 A 92580.00 D Common Stock, par value $0.001 2022-06-15 4 S false 1000.00 15.02 D 91580.00 D Stock Option (option to buy) 0.96 2022-06-15 4 M false 1000.00 0.00 D 2026-12-05 Common Stock, par value $0.001 41521.00 40521.00 D Represents sales effected pursuant to a Rule 10b5-1 trading plan adopted 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 $15.00 to $15.06, 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 shares underlying the option are fully vested and immediately exercisable. /s/ Michael S. Turner, as Attorney-in-Fact 2022-06-17