Insider · CIK 0001836523
Kevin J. Knopp
ceopresidentofficerdirector
Files at MASS (908 Devices Inc.). First filing Feb 4, 2025, latest Feb 3, 2026.
Track record
Not enough history
Fewer than three past buys with six months of prices.
Median 6-month excess
-
after past buys, n = 0
Hit rate
-
past buys that beat the index over 6 months
Open-market trades
2 / 2
$131k bought, $252k sold
Where the trades landed
Last year at the company this insider has traded most, with each buy and sell on the bar it happened.
MASS: 908 Devices Inc.
MASSOct 9, 2026 · close 12.05
Daily candles, adjusted for splits and dividends. Green arrows are insider buys, red are sells, sized by value. Click a marked bar to open the signal.Charts by TradingView Lightweight Charts™
Signals
This insider’s open-market buys and sells, scored.
| Score | Company | Value | Holdings | Price context | Filed |
|---|---|---|---|---|---|
| 30Weak | 908 Devices Inc. | $215k 34,764 shares | -4% | +213% from low-32% from high | |
| 50Moderate | 908 Devices Inc. | $67k 15,000 shares | +2% | +140% from low-22% from high | |
| 45Moderate | 908 Devices Inc. | $65k 15,000 shares | +2% | +130% from low-25% from high | |
| 31Weak | 908 Devices Inc. | $37k 16,001 shares | -2% | - |
Transactions
Every row this insider has filed, newest first.
| Date | Company | Transaction | Shares | Price | Value | Holdings after | Filed |
|---|---|---|---|---|---|---|---|
| Feb 1, 2026 | MASS 908 Devices Inc. | MOption exercise Common Stock | +11,255 | - | - | 733,988 | Feb 3, 2026 |
| Feb 1, 2026 | MASS 908 Devices Inc. | MOption exercise Common Stock | +13,449 | - | - | 747,437 | Feb 3, 2026 |
| Feb 1, 2026 | MASS 908 Devices Inc. | MOption exercise Common Stock | +17,007 | - | - | 764,444 | Feb 3, 2026 |
| Feb 1, 2026 | MASS 908 Devices Inc. | MOption exercise Common Stock | +66,288 | - | - | 830,732 | Feb 3, 2026 |
| Feb 2, 2026 | MASS 908 Devices Inc. | SOpen-market sale Common Stock | -34,764 | $6.18 | $215k | 795,968 | Feb 3, 2026 |
| Feb 1, 2026 | MASS 908 Devices Inc. | MOption exercise Restricted Stock Unitsderivative | -11,255 | $0.00 | $0 | 0 | Feb 3, 2026 |
| Feb 1, 2026 | MASS 908 Devices Inc. | MOption exercise Restricted Stock Unitsderivative | -13,449 | $0.00 | $0 | 13,448 | Feb 3, 2026 |
| Feb 1, 2026 | MASS 908 Devices Inc. | MOption exercise Restricted Stock Unitsderivative | -17,007 | $0.00 | $0 | 34,014 | Feb 3, 2026 |
| Feb 1, 2026 | MASS 908 Devices Inc. | MOption exercise Restricted Stock Unitsderivative | -66,288 | $0.00 | $0 | 132,576 | Feb 3, 2026 |
| Feb 2, 2026 | MASS 908 Devices Inc. | AGrant or award Restricted Stock Unitsderivative | +205,978 | $0.00 | $0 | 205,978 | Feb 3, 2026 |
| Feb 2, 2026 | MASS 908 Devices Inc. | AGrant or award Stock Option (option to buy)derivative | +90,043 | $0.00 | $0 | 90,043 | Feb 3, 2026 |
| May 15, 2025 | MASS 908 Devices Inc. | POpen-market purchase Common Stock | +15,000 | $4.44 | $67k | 722,733 | May 19, 2025 |
| May 14, 2025 | MASS 908 Devices Inc. | POpen-market purchase Common Stock | +15,000 | $4.32 | $65k | 707,733 | May 14, 2025 |
| Mar 3, 2025 | MASS 908 Devices Inc. | AGrant or award Stock Option (option to buy)derivative | +90,518 | $0.00 | $0 | 90,518 | Mar 5, 2025 |
| Mar 3, 2025 | MASS 908 Devices Inc. | AGrant or award Restricted Stock Unitsderivative | +198,864 | $0.00 | $0 | 198,864 | Mar 5, 2025 |
| Feb 1, 2025 | MASS 908 Devices Inc. | MOption exercise Common Stock | +11,254 | - | - | 678,279 | Feb 4, 2025 |
| Feb 1, 2025 | MASS 908 Devices Inc. | MOption exercise Common Stock | +13,448 | - | - | 691,727 | Feb 4, 2025 |
| Feb 1, 2025 | MASS 908 Devices Inc. | MOption exercise Common Stock | +17,007 | - | - | 708,734 | Feb 4, 2025 |
| Feb 3, 2025 | MASS 908 Devices Inc. | SOpen-market sale Common Stock | -4,318 | $2.33 | $10k | 704,416 | Feb 4, 2025 |
| Feb 3, 2025 | MASS 908 Devices Inc. | SOpen-market sale Common Stock | -5,159 | $2.31 | $12k | 699,257 | Feb 4, 2025 |
| Feb 3, 2025 | MASS 908 Devices Inc. | SOpen-market sale Common Stock | -6,524 | $2.32 | $15k | 692,733 | Feb 4, 2025 |
| Feb 1, 2025 | MASS 908 Devices Inc. | MOption exercise Restricted Stock Unitsderivative | -11,254 | $0.00 | $0 | 11,255 | Feb 4, 2025 |
| Feb 1, 2025 | MASS 908 Devices Inc. | MOption exercise Restricted Stock Unitsderivative | -13,448 | $0.00 | $0 | 26,897 | Feb 4, 2025 |
| Feb 1, 2025 | MASS 908 Devices Inc. | MOption exercise Restricted Stock Unitsderivative | -17,007 | $0.00 | $0 | 51,021 | Feb 4, 2025 |
| Dec 13, 2024 | MASS 908 Devices Inc. | MOption exercise Common Stock | +47,418 | $1.75 | $83k | 556,399 | Dec 16, 2024 |
| Dec 13, 2024 | MASS 908 Devices Inc. | MOption exercise Common Stock | +110,626 | $1.58 | $175k | 667,025 | Dec 16, 2024 |
| Dec 13, 2024 | MASS 908 Devices Inc. | MOption exercise Stock Option (Right to Buy)derivative | -47,418 | $0.00 | $0 | 0 | Dec 16, 2024 |
| Dec 13, 2024 | MASS 908 Devices Inc. | MOption exercise Stock Option (Right to Buy)derivative | -110,626 | $0.00 | $0 | 0 | Dec 16, 2024 |
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.