Brown Christopher D. 4

What Happened
Christopher D. Brown, a director of 908 Devices, sold 20,000 shares on June 3, 2026, in an open‑market transaction (reported as a sale). The reported weighted average price was $8.73 per share, for total proceeds of approximately $174,600. This sale was carried out pursuant to a Rule 10b5‑1 trading plan.

Key Details

• Transaction date: 2026-06-03; Form 4 filed: 2026-06-04 (filed within the normal reporting window).
• Shares sold: 20,000; weighted average price: $8.73; price range reported: $8.61–$8.86.
• Reported proceeds: ~$174,600.
• Footnotes: F1—sale executed under a Rule 10b5‑1 plan adopted Nov 24, 2025; F2—price is a weighted average across multiple trades, and the filer can provide the breakdown on request.
• Shares owned after transaction: not specified in the provided filing excerpt.

Context
This was a sale (transaction code S) under a pre‑arranged 10b5‑1 plan, which often schedules trades regardless of short‑term insider views. The filing does not by itself indicate the insider’s current outlook on the company.