Form 4 Filing for 908 Devices Inc.

On September 29, 2026, AWM Investment Company, Inc., a 10% owner of 908 Devices Inc., reported a disposition of 18,000 shares of common stock. The shares were sold at an average price of $11.5179 per share. Following this transaction, AWM Investment Company, Inc. holds a total of 4,736,773 shares. The filing, designated as Form 4, indicates that AWM Investment Company, Inc. acts as the investment adviser to several funds, including Special Situations Fund III QP, L.P., Special Situations Cayman Fund, L.P., Special Situations Private Equity Fund, L.P., Special Situations Technology Fund, L.P., and Special Situations Technology Fund II, L.P. David M. Greenhouse and Adam C. Stettner are identified as the controlling principals of AWM. The reporting person disclaims beneficial ownership except to the extent of their pecuniary interest.