Form 4 Filing for 908 Devices Inc.

This Form 4 filing details a transaction by Griffith Joseph H. IV, the Chief Financial Officer of 908 Devices Inc. (MASS). On May 28, 2026, Mr. Griffith disposed of 6,940 shares of Common Stock at a price of $9.03 per share, pursuant to a Rule 10b5-1 trading plan adopted on June 2, 2025. Following this transaction, Mr. Griffith holds 132,956 shares of Common Stock directly. The filing was signed on May 29, 2026, by Mark S. Levine as Attorney-in-Fact.