908 Devices (MASS) 10% Holder AWM Investment Sells 25,000 Shares

What Happened
AWM Investment Company, Inc. (a 10% owner via funds it advises) sold a total of 25,000 shares of 908 Devices Inc. in two open-market dispositions. On 2026-09-23 AWM sold 1,000 shares at $11.25 each for $11,250, and on 2026-09-24 it sold 24,000 shares at a reported weighted-average price of $11.36 each for $272,626, for aggregate proceeds of approximately $283,876. These were sales (dispositions), not purchases.

Key Details

• Transaction dates & prices: 2026-09-23 — 1,000 shares @ $11.25; 2026-09-24 — 24,000 shares @ $11.36 (F1: weighted average price noted).
• Total shares sold: 25,000; total proceeds: ~$283,876.
• Holdings disclosed (per filing/F2): AWM, as adviser, holds sole voting and investment power over 4,754,773 shares across five funds (SSFQP, CAY, SSPE, TECH, TECH II).
• Beneficial-ownership note (F3): AWM disclaims beneficial ownership except for pecuniary interest; principals David M. Greenhouse and Adam C. Stettner are controlling principals of AWM.
• Filing timeliness: Report filed 2026-09-25 for trades on 2026-09-23 and 2026-09-24 — appears to be timely under Section 16 reporting rules.

Context
This filing reflects institutional selling by an investment adviser on behalf of funds, not a personal sale by an individual executive. Such sales are often portfolio or liquidity actions and do not necessarily indicate management sentiment about the company.