Joseph H. Griffith IV sold $143k of MASS
Chief Financial Officer at 908 Devices Inc.. 23,175 shares at an average of $6.18, traded Feb 2, 2026, filed Feb 3, 2026.
Score components
- +22RoleCFO
- +11Trade size$143k at market
- +5Share of holdings soldSold 14% of holdings
- +8Cluster2 insiders selling within 14 days
- -15Exercise and sellShares came from an option exercise in the same filing
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 0001431531-26-000002, as filed. Open on EDGAR
| Date | Transaction | Shares | Price | Value | Holdings after | Filed |
|---|---|---|---|---|---|---|
| Feb 1, 2026 | MOption exercise Common Stock | +5,102 | - | - | 98,032 | Feb 3, 2026 |
| Feb 1, 2026 | MOption exercise Common Stock | +10,306 | - | - | 108,338 | Feb 3, 2026 |
| Feb 1, 2026 | MOption exercise Common Stock | +11,260 | - | - | 119,598 | Feb 3, 2026 |
| Feb 1, 2026 | MOption exercise Common Stock | +43,473 | - | - | 163,071 | Feb 3, 2026 |
| Feb 2, 2026 | SOpen-market sale Common Stock | -23,175 | $6.18 | $143k | 139,896 | Feb 3, 2026 |
| Feb 1, 2026 | MOption exercise Restricted Stock Unitsderivative | -5,102 | $0.00 | $0 | 0 | Feb 3, 2026 |
| Feb 1, 2026 | MOption exercise Restricted Stock Unitsderivative | -10,306 | $0.00 | $0 | 10,306 | Feb 3, 2026 |
| Feb 1, 2026 | MOption exercise Restricted Stock Unitsderivative | -11,260 | $0.00 | $0 | 22,521 | Feb 3, 2026 |
| Feb 1, 2026 | MOption exercise Restricted Stock Unitsderivative | -43,473 | $0.00 | $0 | 86,945 | Feb 3, 2026 |
| Feb 2, 2026 | AGrant or award Restricted Stock Unitsderivative | +121,164 | $0.00 | $0 | 121,164 | Feb 3, 2026 |
| Feb 2, 2026 | AGrant or award Stock Option (option to buy)derivative | +52,967 | $0.00 | $0 | 52,967 | Feb 3, 2026 |
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% | |
| 19Weak | 908 Devices Inc. | John Kenneweg SVP, Sales & Product Marketing | $280k 27,656 shares | -47% | |
| 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% | |
| 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.