MASS
908 Devices Inc. · Manufacturing · Market cap $487.7M
Insiders sold $4.7M net in the last 90 days ·5 sellers, 0 buyers· 15 of 21 sales under Rule 10b5-1 plans· latest Form 4 filed Oct 9, 2026
Insider Buying
$0
reported purchases (SEC code P)
Insider Selling
$10.0M
reported sales (SEC code S)
Unique Insiders
6
in the rolling window
Latest filing
Oct 9, 2026
Brown Christopher D.
908 Devices Inc. (MASS) has 48 SEC Form 4 filings (89 transaction rows) in the rolling window, disclosed by 6 distinct insiders. Most recent filing: Oct 9, 2026.
Inside the rolling window, 6 insiders at 908 Devices Inc. reported no open-market purchases and 55 open-market sales totaling $10.0M. The most active filer is 10% Owner AWM Investment Company, Inc. with 16 filings. Insiders have net sold $9.1M over the trailing 6 months. The most recent open-market filing is a sale of 30,000 shares by Director Brown Christopher D., dated Oct 7, 2026, worth $357K.
- Industry:Medical - Specialties
- CEO:Kevin J. Knopp
- Employees:172
- HQ:Burlington, MA, US
- IPO:2020-12-18
| Source | |||||||
|---|---|---|---|---|---|---|---|
| Director | Sale | 30,000 | $357K | Oct 9 | -2.1% | SEC ↗ | |
| Chief Financial Officer | Sale | 5,000 | $65K | Oct 8 | +2.2% | SEC ↗ | |
| 10% Owner | Sale | 18,000 | $207K | Oct 1 | -5.7% | SEC ↗ | |
| 10% Owner | Sale | 1,000 | $11K | Sep 25 | +3.1% | SEC ↗ | |
| 10% Owner | Sale | 24,000 | $273K | Sep 25 | +3.1% | SEC ↗ | |
Kenneweg JohnFirst in 4 months | SVP, Sales & Product Marketing | Sale | 1,000 | $10K | Sep 17 | +7.5% | SEC ↗ |
Kenneweg JohnFirst in 4 months | SVP, Sales & Product Marketing | Sale | 21,399 | $216K | Sep 17 | +7.5% | SEC ↗ |
Kenneweg JohnFirst in 4 months | SVP, Sales & Product Marketing | Sale | 5,257 | $54K | Sep 17 | +7.5% | SEC ↗ |
| Director | Sale | 30,000 | $317K | Sep 4 | +17.4% | SEC ↗ | |
Griffith Joseph H. IVFirst in 3 months | Chief Financial Officer | Sale | 11,459 | $125K | Aug 27 | +6.3% | SEC ↗ |
| 10% Owner | Sale | 8,422 | $89K | Aug 24 | — | SEC ↗ | |
| 10% Owner | Sale | 41,578 | $441K | Aug 24 | — | SEC ↗ | |
| President and CEO | Sale | 7,622 | $77K | Aug 17 | — | SEC ↗ | |
| President and CEO | Sale | 20,000 | $207K | Aug 17 | — | SEC ↗ | |
| President and CEO | Sale | 348 | $3K | Aug 12 | — | SEC ↗ | |
| President and CEO | Sale | 145,918 | $1.4M | Aug 12 | — | SEC ↗ | |
| President and CEO | Sale | 2,747 | $28K | Aug 12 | — | SEC ↗ | |
| Director | Sale | 9,442 | $85K | Aug 12 | — | SEC ↗ | |
| Director | Sale | 8,358 | $77K | Aug 12 | — | SEC ↗ | |
| Director | Sale | 20,000 | $170K | Aug 7 | — | SEC ↗ | |
| 10% Owner | Sale | 50,000 | $418K | Aug 6 | — | SEC ↗ | |
| President and CEO | Sale | 222 | $2K | Jul 7 | — | SEC ↗ | |
| Director | Sale | 2,200 | $20K | Jul 7 | — | SEC ↗ | |
| Director | Sale | 20,000 | $177K | Jul 2 | — | SEC ↗ | |
| President and CEO | Sale | 2,798 | $25K | Jun 30 | — | SEC ↗ |
Earnings: last 7 quarters
Frequently asked questions
How many SEC Form 4 insider filings does MASS have?
908 Devices Inc. (MASS) has 48 SEC Form 4 filings (89 transaction rows) in the rolling 365-day window, disclosed by 6 distinct insiders. Most recent filing: Oct 9, 2026.
When was the most recent SEC Form 4 filing for MASS?
The most recent Form 4 filing for MASS on Tracefour is dated Oct 9, 2026.
Who is the most active insider at MASS?
The most active SEC Form 4 filer at MASS in the rolling window is 10% Owner AWM Investment Company, Inc., with 16 filings.
What is the net insider flow at MASS over the last 6 months?
Over the trailing 180 days, insiders at MASS have net sold $9.1M based on SEC Form 4 disclosures.
What is the total insider buy and sell value at MASS in the current window?
Inside the rolling window, insiders at MASS bought $0 and sold $10.0M based on SEC Form 4 filings.
Can I get alerts for MASS insider trading?
Yes. Tracefour sends a free email when a new SEC Form 4 purchase or sale is filed at 908 Devices Inc. (MASS). Alerts are set per company from the page itself, there is no paid tier, and each email links to the original filing on SEC EDGAR.
Related companies
908 Devices Inc. is in the Manufacturing sector.