X0508 4 2025-06-16 false 0001555279 908 Devices Inc. MASS 0001836524 Turner Michael S. C/O 908 DEVICES INC. 645 SUMMER STREET BOSTON MA 02210 false true false false Chief Legal & Admin Officer false Common Stock 2025-06-16 4 S false 16082.00 7.5139 D 8521.00 D Common Stock 2025-06-17 4 S false 7148.00 7.506 D 1373.00 D Common Stock 2025-06-18 4 S false 1373.00 7.50 D 0.00 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 $7.50 to $7.60, 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 $7.50 to $7.54, 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. /s/ Michael S. Turner 2025-06-18