Mark Spoto bought $43k of MASS
director at 908 Devices Inc.. 10,000 shares at an average of $4.29, traded May 14, 2025, filed May 15, 2025.
Score components
- +15RoleDirector
- +6Trade size$43k at market
- +3Relative to holdingsHoldings up 19%
- +4Price context25% below the 52-week high
- +8Cluster2 insiders buying within 14 days
- 0Repeat buyingFirst buy in 90 days
- 0Track recordToo few past buys to judge (0 with prices)
What happened after comparable buys
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 0001562180-25-003896, as filed. Open on EDGAR
| Date | Transaction | Shares | Price | Value | Holdings after | Filed |
|---|---|---|---|---|---|---|
| May 14, 2025 | POpen-market purchase Common Stock | +7,000 | $4.30 | $30k | 59,971 | May 15, 2025 |
| May 14, 2025 | POpen-market purchase Common Stock | +3,000 | $4.25 | $13k | 62,971 | May 15, 2025 |
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% | |
| 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% | |
| 35Weak | 908 Devices Inc. | Michael S. Turner Chief Legal & Admin Officer | $185k 24,603 shares | -100% | |
| 17Weak | 908 Devices Inc. | Joseph H. Griffith IV Chief Financial Officer | $49k 6,940 shares | -6% |
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.