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Christopher D. Brown, Director at 908 Devices, sold MASS on Aug 11, 2026

Data as of Oct 16

▼ SELL$77.1K8,358 shares at $9.23Christopher D. Brown DirectorMASS 908 Devices Inc.
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Traded
Aug 11, 2026
Disclosed
Aug 12, 2026
Filed
1 day after the trade

Form 4s are due within two business days.

Official filing (SEC Form 4) ↗

The price around the disclosure

Christopher D. Brown, Director at 908 Devices, sold MASS on Aug 11, 2026TRADEDDISCLOSED
MASSSimilar stocks (XLV — its sector index fund), rebased to MASS's price on the disclosure day
MASS since disclosure
+12.4%
after the sale
Similar stocks (XLV) since disclosure
+4.9%
XLV — its sector index fund

Change in closing price from Aug 12, 2026 (the first trading day on or after disclosure) to Oct 16, 2026. Dividends excluded. Not a return anyone earned.

Our take

None of our tested rules fired on this trade.

Other trades in the same filing

  1. ▼ SELLChristopher D. Brown DirectorMASS 908 Devices Inc.$85.3Kdisclosed Aug 12 · filed 2 days after the trade

See every trade on MASS →