908 Devices Inc. (MASS) insider trading.
In Q3 2026, insiders at 908 Devices Inc. reported 26 non-derivative transactions on 14 Forms 3, 4 and 5: 0 open-market purchases and 22 sales worth $4.2M.
- Transactions
- 26
- Purchases (P)
- 0
- Sales (S)
- 22
- Net shares, P minus S
- -430,972
- Insiders
- 6
- Last filed
- 2026-09-25
Insiders
| Insider | Relationship | Transactions | Buys | Sales |
|---|---|---|---|---|
| Knopp Kevin J. | Director, Officer · President and CEO | 7 | 0 | 7 |
| Kenneweg John | Officer · SVP, Sales & Product Marketing | 6 | 0 | 3 |
| Brown Christopher D. | Director | 6 | 0 | 6 |
| AWM Investment Company, Inc. | TenPercentOwner | 5 | 0 | 5 |
| Griffith Joseph H. IV | Officer · Chief Financial Officer | 1 | 0 | 1 |
| Vann Brandi C | Director | 1 | 0 | 0 |
Transactions
| Date | Insider | Code | Shares | Price | Owned after | Filing |
|---|---|---|---|---|---|---|
| 2026-09-24 | AWM Investment Company, Inc. | S (D) | 24,000 | $11.36 | 4,754,773 | Form 4 |
| 2026-09-23 | AWM Investment Company, Inc. | S (D) | 1,000 | $11.25 | 4,755,773 | Form 4 |
| 2026-09-17 | Kenneweg John | M (A) | 5,257 | $0.96 | 63,041 | Form 4 |
| 2026-09-17 | Kenneweg John | S (D) | 5,257 | $10.22 | 57,784 | Form 4 |
| 2026-09-16 | Kenneweg John | M (A) | 21,399 | $0.96 | 79,183 | Form 4 |
| 2026-09-16 | Kenneweg John | S (D) | 21,399 | $10.11 | 57,784 | Form 4 |
| 2026-09-15 | Kenneweg John | M (A) | 1,000 | $0.96 | 58,784 | Form 4 |
| 2026-09-15 | Kenneweg John | S (D) | 1,000 | $10 | 57,784 | Form 4 |
| 2026-09-02 | Brown Christopher D. | S (D) | 30,000 | $10.58 | 775,559 | Form 4 |
| 2026-08-25 | Griffith Joseph H. IV | S (D) | 11,459 | $10.95 | 121,497 | Form 4 |
| 2026-08-21 | AWM Investment Company, Inc. | S (D) | 41,578 | $10.61 | 4,779,773 | Form 4 |
| 2026-08-20 | AWM Investment Company, Inc. | S (D) | 8,422 | $10.52 | 4,821,351 | Form 4 |
| 2026-08-17 | Knopp Kevin J. | S (D) | 20,000 | $10.35 | 555,968 | Form 4 |
| 2026-08-13 | Knopp Kevin J. | S (D) | 7,622 | $10.06 | 575,968 | Form 4 |
| 2026-08-12 | Knopp Kevin J. | S (D) | 2,747 | $10.07 | 583,590 | Form 4 |
| 2026-08-11 | Knopp Kevin J. | S (D) | 30,170 | $10.16 | 586,337 | Form 4 |
| 2026-08-11 | Knopp Kevin J. | S (D) | 115,748 | $9.83 | 616,507 | Form 4 |
| 2026-08-11 | Brown Christopher D. | S (D) | 8,358 | $9.23 | 805,559 | Form 4 |
| 2026-08-10 | Knopp Kevin J. | S (D) | 348 | $9.06 | 732,255 | Form 4 |
| 2026-08-10 | Brown Christopher D. | S (D) | 9,442 | $9.03 | 813,917 | Form 4 |
| 2026-08-05 | Brown Christopher D. | S (D) | 20,000 | $8.49 | 823,359 | Form 4 |
| 2026-08-04 | AWM Investment Company, Inc. | S (D) | 50,000 | $8.36 | 4,829,773 | Form 4 |
| 2026-08-01 | Vann Brandi C | M (A) | 5,192 | — | 5,192 | Form 4 |
| 2026-07-02 | Knopp Kevin J. | S (D) | 222 | $9.07 | 732,603 | Form 4 |
| 2026-07-02 | Brown Christopher D. | S (D) | 2,200 | $9.02 | 843,359 | Form 4 |
| 2026-06-30 | Brown Christopher D. | S (D) | 20,000 | $8.84 | 845,559 | Form 4 |
Transaction codes in this quarter
Get MASS insider transactions through the API
curl "https://sec-api.dev/api/v1/insider-transactions?period=2026q3&cik=1555279&limit=100" \
-H "Authorization: Bearer $SEC_API_KEY"Insider trading API guide · MASS company page · 908 Devices Inc. on SEC.gov
Questions
Are insiders buying or selling 908 Devices Inc. (MASS)?
In Q3 2026, insiders at 908 Devices Inc. reported 26 non-derivative transactions on 14 Forms 3, 4 and 5: 0 open-market purchases and 22 sales worth $4.2M. Grants, tax withholding and option exercises are counted as transactions but are not purchases or sales.
Where do these 908 Devices Inc. insider trades come from?
From the SEC Insider Transactions Data Sets for Q3 2026, which republish the Forms 3, 4 and 5 filed on EDGAR. Each row links to its filing on SEC.gov.
Plain-text version for agents and LLMs: /insider-trading/mass.md
Independent. Not affiliated with, endorsed by, or sponsored by the U.S. Securities and Exchange Commission. Data is reproduced from public SEC filings and datasets. Not investment advice.