Kevin J. Knopp insider trades: 908 Devices (MASS) stock buys and sales
Trades on the price chart
Daily close, with an arrow on each day they bought or sold
Companies
Where Kevin reports to the SEC
Open-market buys and sales
32 trades reported on SEC Form 4, newest first
| Date | Stock | Type | Shares | Price | Value | Holding | Reported |
|---|---|---|---|---|---|---|---|
| Aug 17, 2026 | MASS | ↓ Sell | 27,622 | $10.27 | $284K | Direct | Aug 17, 2026 (0d) |
| Aug 12, 2026 | MASS | ↓ Sell | 149,013 | $9.90 | $1.5M | Direct | Aug 12, 2026 (0d) |
| Jul 2, 2026 | MASS | ↓ Sell | 222 | $9.07 | $2K | Direct | Jul 7, 2026 (5d) |
| Jun 26, 2026 | MASS | ↓ Sell | 2,798 | $9.09 | $25K | Direct | Jun 30, 2026 (4d) |
| Feb 2, 2026 | MASS | ↓ Sell | 34,764 | $6.18 | $215K | Direct | Feb 3, 2026 (1d) |
| May 15, 2025 | MASS | ↑ Buy | 15,000 | $4.44 | $67K | Direct | May 19, 2025 (4d) |
| May 14, 2025 | MASS | ↑ Buy | 15,000 | $4.32 | $65K | Direct | May 14, 2025 (0d) |
| Feb 3, 2025 | MASS | ↓ Sell | 16,001 | $2.32 | $37K | Direct | Feb 4, 2025 (1d) |
| May 13, 2024 | MASS | ↑ Buy | 10,000 | $6.42 | $64K | Direct | May 13, 2024 (0d) |
| May 10, 2024 | MASS | ↑ Buy | 10,000 | $5.77 | $58K | Direct | May 10, 2024 (0d) |
| May 9, 2024 | MASS | ↑ Buy | 10,000 | $5.83 | $58K | Direct | May 9, 2024 (0d) |
| May 8, 2024 | MASS | ↑ Buy | 10,000 | $5.72 | $57K | Direct | May 8, 2024 (0d) |
| May 7, 2024 | MASS | ↑ Buy | 10,000 | $5.60 | $56K | Direct | May 7, 2024 (0d) |
| Feb 1, 2024 | MASS | ↓ Sell | 9,071 | $7.00 | $63K | Direct | Feb 2, 2024 (1d) |
| May 23, 2023 | MASS | ↓ Sell | 60,000 | $10.12 | $607K | Direct | May 25, 2023 (2d) |
| Feb 16, 2023 | MASS | ↓ Sell | 20,000 | $10.25 | $205K | Direct | Feb 17, 2023 (1d) |
| Feb 2, 2023 | MASS | ↓ Sell | 44,049 | $10.40 | $458K | Direct | Feb 3, 2023 (1d) |
| Nov 15, 2022 | MASS | ↓ Sell | 20,000 | $11.04 | $221K | Direct | Nov 17, 2022 (2d) |
| Oct 18, 2022 | MASS | ↓ Sell | 30,000 | $15.08 | $452K | Direct | Oct 19, 2022 (1d) |
| Sep 15, 2022 | MASS | ↓ Sell | 30,000 | $16.94 | $508K | Direct | Sep 19, 2022 (4d) |
| Aug 15, 2022 | MASS | ↓ Sell | 30,000 | $19.27 | $578K | Direct | Aug 17, 2022 (2d) |
| Aug 8, 2022 | MASS | ↓ Sell | 26,196 | $25.32 | $663K | Direct | Aug 9, 2022 (1d) |
| Aug 1, 2022 | MASS | ↓ Sell | 38,347 | $22.28 | $854K | Direct | Aug 1, 2022 (0d) |
| Jul 21, 2022 | MASS | ↓ Sell | 200 | $22.04 | $4K | Direct | Jul 25, 2022 (4d) |
| Jul 15, 2022 | MASS | ↓ Sell | 30,000 | $17.37 | $521K | Direct | Jul 19, 2022 (4d) |
| Jul 8, 2022 | MASS | ↓ Sell | 1,453 | $22.07 | $32K | Direct | Jul 8, 2022 (0d) |
| Jun 21, 2022 | MASS | ↓ Sell | 9,200 | $15.07 | $139K | Direct | Jun 22, 2022 (1d) |
| Jun 15, 2022 | MASS | ↓ Sell | 20,800 | $14.66 | $305K | Direct | Jun 17, 2022 (2d) |
| Nov 1, 2021 | MASS | ↓ Sell | 20,000 | $34.62 | $692K | Direct | Nov 2, 2021 (1d) |
| Oct 1, 2021 | MASS | ↓ Sell | 20,000 | $33.65 | $673K | Direct | Oct 5, 2021 (4d) |
| Sep 1, 2021 | MASS | ↓ Sell | 20,000 | $35.91 | $718K | Direct | Sep 3, 2021 (2d) |
| Aug 18, 2021 | MASS | ↓ Sell | 35,000 | $30.46 | $1.1M | Direct | Aug 18, 2021 (0d) |
Each row is one filing's trades in one stock, summed. Shares and prices are as filed, before any later stock split.
Other MASS insiders
Open-market trades in the last 12 months
About Kevin J. Knopp's insider trades
Kevin J. Knopp is President and CEO at 908 Devices (MASS). Since Aug 18, 2021, Kevin has reported 7 open-market purchases worth $425K and 25 sales worth $10.8M on SEC Form 4. In the last 12 months: 5 sales ($2.0M).
Their filings also include option exercises (7 filings), grants and awards (5 filings), conversions (1 filing). These aren't open-market trades and aren't counted above.
How to read insider trades
Officers, directors and owners of more than 10% of a company must report trades in its stock on SEC Form 4, usually within two business days. Purchases with their own money are the stronger signal: insiders sell for many reasons (taxes, diversification, a house), but buy for one. See every MASS insider trade, the latest insider trades across the market, or cluster buys, when several insiders buy the same stock within days.