Kevin J. Knopp, President and CEO at 908 Devices, sold MASS on Aug 13, 2026
Data as of Oct 16
- Traded
- Aug 13, 2026
- Disclosed
- Aug 17, 2026
- Filed
- 4 days after the trade
Form 4s are due within two business days.
Official filing (SEC Form 4) ↗
The price around the disclosure
MASS since disclosure
+10.5%
after the sale
Similar stocks (XLV) since disclosure
+5.8%
XLV — its sector index fund
Change in closing price from Aug 17, 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
- ▼ SELLKevin J. Knopp President and CEOMASS 908 Devices Inc.$207Kdisclosed Aug 17 · filed the same day