Knopp Kevin J. insider trades
Knopp Kevin J. has filed 40 Form 4s with the SEC that we hold, all for 908 Devices Inc. (MASS), as President and CEO, Director. Across all of them we count 7 purchases worth $424.8K and 57 sales worth $11.4M reported on Form 4. In the last 12 months: 0 purchases ($0) and 12 sales ($2.6M). The largest single trade was a sale of 115,748 shares of 908 Devices Inc. worth $1.1M, dated 2026-08-11. The first filing on our record is dated 2021-08-18 and the latest 2026-08-17.
908 Devices Inc. (MASS)
President and CEO, Director · 40 filings · 64 purchases and sales
| Trade date | Code | Shares | Value as filed | Filed |
|---|---|---|---|---|
| 2021-08-16 | S, sale reported on Form 4 | 9,522 | $287.8K | 2021-08-18 |
| 2021-08-16 | S, sale reported on Form 4 | 6,035 | $185.6K | 2021-08-18 |
| 2021-08-16 | S, sale reported on Form 4 | 3,443 | $107.5K | 2021-08-18 |
| 2021-08-17 | S, sale reported on Form 4 | 4,000 | $120.0K | 2021-08-18 |
| 2021-08-18 | S, sale reported on Form 4 | 12,000 | $365.3K | 2021-08-18 |
| 2021-09-01 | S, sale reported on Form 4 | 3,583 | $130.3K | 2021-09-03 |
| 2021-09-01 | S, sale reported on Form 4 | 10,818 | $389.7K | 2021-09-03 |
| 2021-09-01 | S, sale reported on Form 4 | 5,599 | $198.2K | 2021-09-03 |
| 2021-10-01 | S, sale reported on Form 4 | 5,472 | $191.1K | 2021-10-05 |
| 2021-10-01 | S, sale reported on Form 4 | 9,699 | $319.0K | 2021-10-05 |
| 2021-10-01 | S, sale reported on Form 4 | 4,829 | $162.9K | 2021-10-05 |
| 2021-11-01 | S, sale reported on Form 4 | 3,897 | $131.4K | 2021-11-02 |
| 2021-11-01 | S, sale reported on Form 4 | 7,775 | $267.3K | 2021-11-02 |
| 2021-11-01 | S, sale reported on Form 4 | 8,328 | $293.7K | 2021-11-02 |
| 2022-06-15 | S, sale reported on Form 4 | 18,800 | $274.9K | 2022-06-17 |
| 2022-06-15 | S, sale reported on Form 4 | 2,000 | $30.0K | 2022-06-17 |
| 2022-06-21 | S, sale reported on Form 4 | 9,200 | $138.6K | 2022-06-22 |
| 2022-07-06 | S, sale reported on Form 4 | 1,000 | $22.1K | 2022-07-08 |
| 2022-07-08 | S, sale reported on Form 4 | 453 | $10.0K | 2022-07-08 |
| 2022-07-15 | S, sale reported on Form 4 | 18,231 | $323.4K | 2022-07-19 |
| 2022-07-15 | S, sale reported on Form 4 | 11,769 | $197.7K | 2022-07-19 |
| 2022-07-21 | S, sale reported on Form 4 | 200 | $4.4K | 2022-07-25 |
| 2022-07-28 | S, sale reported on Form 4 | 5,700 | $125.5K | 2022-08-01 |
| 2022-07-29 | S, sale reported on Form 4 | 18,000 | $400.0K | 2022-08-01 |
| 2022-08-01 | S, sale reported on Form 4 | 14,647 | $329.0K | 2022-08-01 |
| 2022-08-05 | S, sale reported on Form 4 | 25,910 | $656.0K | 2022-08-09 |
| 2022-08-08 | S, sale reported on Form 4 | 286 | $7.2K | 2022-08-09 |
| 2022-08-15 | S, sale reported on Form 4 | 2,373 | $46.8K | 2022-08-17 |
| 2022-08-15 | S, sale reported on Form 4 | 27,627 | $531.3K | 2022-08-17 |
| 2022-09-15 | S, sale reported on Form 4 | 30,000 | $508.2K | 2022-09-19 |
| 2022-10-17 | S, sale reported on Form 4 | 11,200 | $164.4K | 2022-10-19 |
| 2022-10-18 | S, sale reported on Form 4 | 18,800 | $288.0K | 2022-10-19 |
| 2022-11-15 | S, sale reported on Form 4 | 12,368 | $130.4K | 2022-11-17 |
| 2022-11-15 | S, sale reported on Form 4 | 6,619 | $77.8K | 2022-11-17 |
| 2022-11-15 | S, sale reported on Form 4 | 1,013 | $12.6K | 2022-11-17 |
| 2023-02-01 | S, sale reported on Form 4 | 4,049 | $37.9K | 2023-02-03 |
| 2023-02-02 | S, sale reported on Form 4 | 40,000 | $420.4K | 2023-02-03 |
| 2023-02-15 | S, sale reported on Form 4 | 15,158 | $156.0K | 2023-02-17 |
| 2023-02-16 | S, sale reported on Form 4 | 4,842 | $49.0K | 2023-02-17 |
| 2023-05-23 | S, sale reported on Form 4 | 60,000 | $607.2K | 2023-05-25 |
| 2024-02-01 | S, sale reported on Form 4 | 4,099 | $28.6K | 2024-02-02 |
| 2024-02-01 | S, sale reported on Form 4 | 4,972 | $34.9K | 2024-02-02 |
| 2024-05-07 | P, purchase reported on Form 4 | 10,000 | $56.0K | 2024-05-07 |
| 2024-05-08 | P, purchase reported on Form 4 | 10,000 | $57.2K | 2024-05-08 |
| 2024-05-09 | P, purchase reported on Form 4 | 10,000 | $58.3K | 2024-05-09 |
| 2024-05-10 | P, purchase reported on Form 4 | 10,000 | $57.7K | 2024-05-10 |
| 2024-05-13 | P, purchase reported on Form 4 | 10,000 | $64.2K | 2024-05-13 |
| 2025-02-03 | S, sale reported on Form 4 | 6,524 | $15.1K | 2025-02-04 |
| 2025-02-03 | S, sale reported on Form 4 | 5,159 | $11.9K | 2025-02-04 |
| 2025-02-03 | S, sale reported on Form 4 | 4,318 | $10.1K | 2025-02-04 |
| 2025-05-14 | P, purchase reported on Form 4 | 15,000 | $64.8K | 2025-05-14 |
| 2025-05-15 | P, purchase reported on Form 4 | 15,000 | $66.6K | 2025-05-19 |
| 2026-02-02 | S, sale reported on Form 4 | 34,764 | $214.8K | 2026-02-03 |
| 2026-06-23 | S, sale reported on Form 4 | 3,422 | $31.0K | 2026-06-25 |
| 2026-06-24 | S, sale reported on Form 4 | 40,535 | $370.5K | 2026-06-25 |
| 2026-06-25 | S, sale reported on Form 4 | 16,388 | $149.1K | 2026-06-25 |
| 2026-06-26 | S, sale reported on Form 4 | 2,798 | $25.4K | 2026-06-30 |
| 2026-07-02 | S, sale reported on Form 4 | 222 | $2.0K | 2026-07-07 |
| 2026-08-10 | S, sale reported on Form 4 | 348 | $3.2K | 2026-08-12 |
| 2026-08-11 | S, sale reported on Form 4 | 115,748 | $1.1M | 2026-08-12 |
| 2026-08-11 | S, sale reported on Form 4 | 30,170 | $306.5K | 2026-08-12 |
| 2026-08-12 | S, sale reported on Form 4 | 2,747 | $27.7K | 2026-08-12 |
| 2026-08-13 | S, sale reported on Form 4 | 7,622 | $76.7K | 2026-08-17 |
| 2026-08-17 | S, sale reported on Form 4 | 20,000 | $207.0K | 2026-08-17 |
Source
Counted from the Form 4 filings this reporting owner (SEC CIK 1836523) filed on EDGAR. Values are the transaction values as filed. See every filing on EDGAR, or browse insider buying and today's insider purchases.
Source: U.S. Securities and Exchange Commission (EDGAR) and other official
government data · Updated 2026-10-12 ·
For informational purposes only, not investment advice.
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