John Kenneweg sold $280k of MASS
SVP, Sales & Product Marketing at 908 Devices Inc.. 27,656 shares at an average of $10.13, traded Sep 15, 2026, filed Sep 17, 2026.
Score components
- +15RoleOfficer
- +14Trade size$280k at market
- +10Share of holdings soldSold 47% of holdings
- +15Cluster3 insiders selling within 14 days
- -15Exercise and sellShares came from an option exercise in the same filing
- -2010b5-1 planPre-scheduled under a 10b5-1 plan
What happened after comparable sells
Same side and tier, against the S&P 500, at 1, 3 and 6 months. Shown to Pro users; the whole table is on the backtest page.
Price around the trade, and since
From a quarter before the trade to today. The arrow is the trade, the circle the day the filing reached EDGAR, which is the first day anyone outside could act; the dotted line is the S&P 500 rebased to that day's close.
Daily candles, adjusted for splits and dividends. Green arrows are insider buys, red are sells, sized by value; the dashed line is the close on the filing day, the dotted line SPY rebased to it.Charts by TradingView Lightweight Charts™
Rows in this filing
Every transaction in Form 4 0001836876-26-000011, as filed. Open on EDGAR
| Date | Transaction | Shares | Price | Value | Holdings after | Filed |
|---|---|---|---|---|---|---|
| Sep 15, 2026 | MOption exercise Common Stock10b5-1 | +1,000 | $0.96 | $960 | 58,784 | 25 d ago |
| Sep 15, 2026 | SOpen-market sale Common Stock10b5-1 | -1,000 | $10.00 | $10k | 57,784 | 25 d ago |
| Sep 16, 2026 | MOption exercise Common Stock10b5-1 | +21,399 | $0.96 | $21k | 79,183 | 25 d ago |
| Sep 16, 2026 | SOpen-market sale Common Stock10b5-1 | -21,399 | $10.11 | $216k | 57,784 | 25 d ago |
| Sep 17, 2026 | MOption exercise Common Stock10b5-1 | +5,257 | $0.96 | $5,047 | 63,041 | 25 d ago |
| Sep 17, 2026 | SOpen-market sale Common Stock10b5-1 | -5,257 | $10.22 | $54k | 57,784 | 25 d ago |
| Sep 15, 2026 | MOption exercise Stock Option (right to buy)derivative10b5-1 | -1,000 | $0.00 | $0 | 26,656 | 25 d ago |
| Sep 16, 2026 | MOption exercise Stock Option (right to buy)derivative10b5-1 | -21,399 | $0.00 | $0 | 5,257 | 25 d ago |
| Sep 17, 2026 | MOption exercise Stock Option (right to buy)derivative10b5-1 | -5,257 | $0.00 | $0 | 0 | 25 d ago |
Related signals
Other insiders at 908 Devices Inc. and this insider’s other filings.
| Score | Company | Insider | Value | Holdings | Filed |
|---|---|---|---|---|---|
| 10Weak | 908 Devices Inc. | Christopher D. Brown Chief Product Officer | $357k 30,000 shares | -4% | |
| 25Weak | 908 Devices Inc. | Joseph H. Griffith IV Chief Financial Officer | $65k 5,000 shares | -4% | |
| 39Weak | 908 Devices Inc. | AWM Investment Company, Inc. owner | $207k 18,000 shares | -0% | |
| 41Moderate | 908 Devices Inc. | AWM Investment Company, Inc. owner | $284k 25,000 shares | -1% | |
| 17Weak | 908 Devices Inc. | Christopher D. Brown Chief Product Officer | $317k 30,000 shares | -4% | |
| 0Weak | 908 Devices Inc. | Kevin J. McCallion SVP, Products and Production | $49 7 shares | -0% | |
| 31Weak | 908 Devices Inc. | Joseph H. Griffith IV Chief Financial Officer | $143k 23,175 shares | -14% | |
| 30Weak | 908 Devices Inc. | Kevin J. Knopp President and CEO | $215k 34,764 shares | -4% | |
| 8Weak | 908 Devices Inc. | Joseph H. Griffith IV Chief Financial Officer | $45k 5,000 shares | -5% | |
| 8Weak | 908 Devices Inc. | Joseph H. Griffith IV Chief Financial Officer | $35k 5,000 shares | -5% |
Not investment advice. Scores and forward returns are decision support built from public SEC filings and past prices; they describe what happened after comparable filings, not what will happen after this one. Do your own research and size your risk.