Form 4 Filing for 908 Devices Inc.

This filing details a transaction by AWM Investment Company, Inc., a significant owner of 908 Devices Inc. (MASS). On May 11, 2026, AWM Investment Company, Inc. disposed of 5,000 shares of common stock in 908 Devices Inc. at a price of $8.2514 per share. Following this transaction, AWM Investment Company, Inc. holds 5,116,715 shares. The filing was signed by Adam Stettner on May 13, 2026. 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., and others, which collectively hold the shares. David M. Greenhouse and Adam C. Stettner are identified as the controlling principals of AWM Investment Company, Inc.