MASS insider trades & Congress trades
908 Devices Inc.: public insider filings and Congress disclosures, in one place.
Bourse has recorded 22 open-market insider transactions in 908 Devices Inc. (MASS) (0 purchases with code P and 22 sales with code S), the most recent on October 7, 2026.
In the last 90 days: 0 purchases by 0 insiders ($0) and 20 sales by 5 ($4.09M).
Insider transactions
SEC Form 4, open-market purchases (P) and sales (S) only. Awards, option exercises and tax withholding are excluded. “After” shows the stock’s return over the month following the trade, where available.
| Date | Insider | Role | Type | Shares | Price | Value | After 1M |
|---|---|---|---|---|---|---|---|
| Oct 7, 2026 | Brown Christopher D. | Chief Product Officer | Sell | 30,000 | $11.89 | $357K | – |
| Oct 6, 2026 | Griffith Joseph H. IV | Chief Financial Officer | Sell | 5,000 | $13.03 | $65K | – |
| Sep 29, 2026 | AWM Investment Company, Inc. | – | Sell | 18,000 | $11.52 | $207K | −0.1% |
| Sep 24, 2026 | AWM Investment Company, Inc. | – | Sell | 24,000 | $11.36 | $273K | +0.0% |
| Sep 23, 2026 | AWM Investment Company, Inc. | – | Sell | 1,000 | $11.25 | $11K | +0.0% |
| Sep 17, 2026 | Kenneweg John | SVP, Sales & Product Marketing | Sell | 5,257 | $10.22 | $54K | – |
| Sep 16, 2026 | Kenneweg John | SVP, Sales & Product Marketing | Sell | 21,399 | $10.11 | $216K | +0.0% |
| Sep 15, 2026 | Kenneweg John | SVP, Sales & Product Marketing | Sell | 1,000 | $10.00 | $10K | +0.0% |
| Sep 2, 2026 | Brown Christopher D. | Chief Product Officer | Sell | 30,000 | $10.58 | $317K | +0.2% |
| Aug 25, 2026 | Griffith Joseph H. IV | Chief Financial Officer | Sell | 11,459 | $10.95 | $125K | +0.1% |
| Aug 21, 2026 | AWM Investment Company, Inc. | – | Sell | 41,578 | $10.61 | $441K | +0.0% |
| Aug 20, 2026 | AWM Investment Company, Inc. | – | Sell | 8,422 | $10.52 | $89K | +0.0% |
| Aug 17, 2026 | Knopp Kevin J. | President and CEO | Sell | 20,000 | $10.35 | $207K | −0.1% |
| Aug 13, 2026 | Knopp Kevin J. | President and CEO | Sell | 7,622 | $10.06 | $77K | −0.1% |
| Aug 12, 2026 | Knopp Kevin J. | President and CEO | Sell | 2,747 | $10.07 | $28K | −0.0% |
| Aug 11, 2026 | Brown Christopher D. | Chief Product Officer | Sell | 8,358 | $9.23 | $77K | −0.0% |
| Aug 11, 2026 | Knopp Kevin J. | President and CEO | Sell | 115,748 | $9.83 | $1.14M | −0.0% |
| Aug 11, 2026 | Knopp Kevin J. | President and CEO | Sell | 30,170 | $10.16 | $307K | −0.0% |
| Aug 10, 2026 | Brown Christopher D. | Chief Product Officer | Sell | 9,442 | $9.03 | $85K | −0.0% |
| Aug 10, 2026 | Knopp Kevin J. | President and CEO | Sell | 348 | $9.06 | $3K | −0.0% |
| Aug 5, 2026 | Brown Christopher D. | Chief Product Officer | Sell | 20,000 | $8.49 | $170K | +0.1% |
| Aug 4, 2026 | AWM Investment Company, Inc. | – | Sell | 50,000 | $8.36 | $418K | +0.2% |
Data as of November 8, 2026. Public filings only. A purchase or sale by a politician or an insider does not by itself imply any wrongdoing.
New to these filings? Read how to read a Form 4, how Congress trades are disclosed and what insider cluster buying means. Sources and limits are on the Methodology page.
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