X0508 4 2025-05-14 false 0001555279 908 Devices Inc. MASS 0001836585 Spoto Mark C/O 908 DEVICES INC. 645 SUMMER STREET BOSTON MA 02210 true false false false false Common Stock 2025-05-14 4 P false 7000.00 4.30 A 59971.00 D Common Stock 2025-05-14 4 P false 3000.00 4.25 A 62971.00 D Common Stock 3599.00 I See Footnote These securities are owned directly by Razor's Edge Ventures, LLC. The reporting person is a managing member of Razor's Edge Ventures, LLC and may be deemed to be the beneficial owner of the securities held by Razor's Edge Ventures, LLC. The reporting person disclaims beneficial ownership of the securities held by Razor's Edge Ventures, LLC except to the extent of his pecuniary interest therein. /s/ Michael S. Turner, as Attorney-in-Fact 2025-05-15