Transaction Details

Footnotes

The reported purchases are matchable with sales by the reporting person on February 3, 2025 mandated by 908 Devices to cover tax withholding obligations in connection with the vesting and settlement of restricted stock units; however, the reporting person did not realize any profit in connection with such short-swing transactions, and thus no disgorgement is owed to 908 Devices. | The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $4.42 to $4.44, 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.