908 Devices Inc: director Christopher D. Brown sold 30,000 shares

What happened Christopher D. Brown, a director of 908 Devices Inc., sold 30,000 shares in an open-market sale at a weighted average price of $11.89 on Oct 7, 2026, for total proceeds of $356,700. On the same date he exercised or converted derivatives totaling 120,000 shares: 60,000 shares were acquired at $1.75 for $105,000 and 60,000 shares were exercised/converted and disposed at $0.00 for $0, per the Form 4.

Key details

• Transaction date: Oct 7, 2026.
• Sale: 30,000 shares sold in the open market at a weighted average price of $11.89 (prices ranged from $11.75 to $12.12), total $356,700.
• Derivative activity: exercised/converted 60,000 shares at $1.75 (cost $105,000) and exercised/converted 60,000 shares reported as disposed at $0.00 (derivative).
• Shares owned after the transaction: not stated in the provided filing excerpt.
• Footnotes: transaction executed under a Rule 10b5-1 trading plan adopted Nov 24, 2025 (F1); weighted average sale price and range disclosed (F2); shares underlying the option were fully vested and immediately exercisable (F3).
• Filing date: Oct 9, 2026 (no late-filing flag in the Form 4).

Why it may matter

• The filing shows option exercise activity and an open-market sale on the same date; it also shows another exercised/converted block reported as disposed at $0.00, indicating some exercised shares were immediately disposed according to the Form 4.
• This filing does not show why the insider traded or why the company acted.