AWM Investment Company, Inc. 4

What Happened AWM Investment Company, Inc., the investment adviser that holds voting and investment power over multiple Special Situations funds (a 10% owner), sold 5,000 shares of 908 Devices (MASS) in an open-market transaction on May 11, 2026. The shares were disposed at a weighted average price of $8.25 per share for a total reported value of $41,257. This was a sale (not a purchase), which is often routine portfolio activity for an institutional holder.

Key Details

• Transaction date and filing: Sale on 2026-05-11; Form 4 filed 2026-05-13 (timely — within the 2 business day requirement).
• Price and value: 5,000 shares at a weighted average price of $8.25; total reported proceeds $41,257 (F1 notes weighted avg price).
• Shares held after transaction: AWM (as adviser to the Funds) reported sole voting/investment power over 5,116,715 shares before the sale and 5,111,715 shares after the 5,000-share disposition.
• Footnotes: F2 explains AWM is adviser to several funds that collectively hold the shares; F3 notes controlling principals and that AWM disclaims beneficial ownership except to the extent of pecuniary interest.
• Transaction code: S = Sale (open-market/private sale).

Context This filing reflects an institutional adviser reducing holdings by a small amount relative to its multi-million-share position — typically portfolio rebalancing or liquidity management rather than an individual insider signal. Because AWM reports advisory control (not direct executive ownership), interpret the sale as institutional trading activity rather than a company insider's personal trade.