Joseph H. Griffith IV sold $125k of MASS
Chief Financial Officer at 908 Devices Inc.. 11,459 shares at an average of $10.95, traded Aug 25, 2026, filed Aug 27, 2026.
Score components
- +22RoleCFO
- +11Trade size$125k at market
- 0Share of holdings soldSold 8.6% of holdings
- +15Cluster4 insiders selling within 14 days
- -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 0001431531-26-000007, as filed. Open on EDGAR
| Date | Transaction | Shares | Price | Value | Holdings after | Filed |
|---|---|---|---|---|---|---|
| Aug 25, 2026 | SOpen-market sale Common Stock10b5-1 | -11,459 | $10.95 | $125k | 121,497 | Aug 27, 2026 |
Related signals
Other insiders at 908 Devices Inc. and this insider’s other filings.
| Score | Company | Insider | Value | Holdings | Filed |
|---|---|---|---|---|---|
| Pro nowfree Oct 16, 2026 | 908 Devices Inc. | Christopher D. Brown Chief Technology Officer | $357k 30,000 shares | -4% | |
| Pro nowfree Oct 15, 2026 | 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% | |
| 19Weak | 908 Devices Inc. | John Kenneweg SVP, Sales & Product Marketing | $280k 27,656 shares | -47% | |
| 24Weak | 908 Devices Inc. | Christopher D. Brown Chief Technology Officer | $317k 30,000 shares | -4% | |
| 45Moderate | 908 Devices Inc. | AWM Investment Company, Inc. owner | $530k 50,000 shares | -1% | |
| 34Weak | 908 Devices Inc. | Kevin J. Knopp President and CEO | $284k 27,622 shares | -5% | |
| 50Moderate | 908 Devices Inc. | Kevin J. Knopp President and CEO | $1.5M 149,013 shares | -20% | |
| 21Weak | 908 Devices Inc. | Christopher D. Brown Chief Technology Officer | $162k 17,800 shares | -2% |
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.