Christopher D. Brown sold $317K of MASS stock

Christopher D. Brown, Dir of 908 Devices Inc. (MASS), sold 30,000 shares of MASS stock worth $317K, per an SEC Form 4 filed Sep 4, 2026.

The sale was pre-arranged (a 10b5-1 plan or an option exercise), not a fresh decision.

The trade happened on Sep 2, 2026, 2 days before it was made public.

MASS has moved +2.2% since the trade date, from $10.33 to $10.56 (Nov 6, 2026 close).