MASS
908 Devices Inc.
Latest Form 4:Sale$125KbyGriffith Joseph H. IV (Chief Financial Officer) · filed Aug 27, 2026
908 Devices Inc. (MASS) has 44 SEC Form 4 filings (79 transaction rows) in the rolling window, disclosed by 6 distinct insiders. Most recent filing: Aug 27, 2026.
The most active filer is 10% Owner AWM Investment Company, Inc. with 13 filings. Insiders have net sold $8.1M over the trailing 6 months.
- Industry:Medical - Specialties
- CEO:Kevin J. Knopp
- Employees:172
- HQ:Burlington, MA, US
- IPO:2020-12-18
Insider Buying
$0
reported purchases (SEC code P)
Insider Selling
$8.5M
reported sales (SEC code S)
Unique Insiders
6
in the rolling window
Market Cap
$443.5M
latest known value
| Source | ||||||
|---|---|---|---|---|---|---|
Griffith Joseph H. IVFirst in 3 months | Chief Financial Officer | Sale | 11,459 | $125K | Aug 27 | 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 ↗ | |
Knopp Kevin J.First in 5 months | President and CEO | Sale | 3,422 | $31K | Jun 25 | SEC ↗ |
Knopp Kevin J.First in 5 months | President and CEO | Sale | 40,535 | $370K | Jun 25 | SEC ↗ |
Knopp Kevin J.First in 5 months | President and CEO | Sale | 16,388 | $149K | Jun 25 | SEC ↗ |
| Director | Sale | 9,900 | $89K | Jun 25 | SEC ↗ | |
| 10% Owner | Sale | 4,668 | $42K | Jun 24 | SEC ↗ | |
| 10% Owner | Sale | 3,050 | $27K | Jun 24 | SEC ↗ | |
| Director | Sale | 100 | $900 | Jun 5 | SEC ↗ | |
| 10% Owner | Sale | 2,500 | $22K | Jun 4 | SEC ↗ | |
| 10% Owner | Sale | 39,782 | $357K | Jun 4 | SEC ↗ | |
| Director | Sale | 20,000 | $175K | Jun 4 | SEC ↗ | |
| 10% Owner | Sale | 16,500 | $136K | May 29 | SEC ↗ | |
| 10% Owner | Sale | 170,442 | $1.5M | May 29 | SEC ↗ | |
| Director | Sale | 30,000 | $270K | May 29 | SEC ↗ | |
Griffith Joseph H. IVFirst in 4 months | Chief Financial Officer | Sale | 6,940 | $63K | May 29 | SEC ↗ |
| 10% Owner | Sale | 5,000 | $41K | May 13 | SEC ↗ | |
| SVP, Sales & Product Marketing | Sale | 18,255 | $148K | May 11 | SEC ↗ | |
AWM Investment Company, Inc.First filing | 10% Owner | Sale | 62,365 | $502K | May 8 | SEC ↗ |
AWM Investment Company, Inc.First filing | 10% Owner | Sale | 12,819 | $105K | May 8 | SEC ↗ |
AWM Investment Company, Inc.First filing | 10% Owner | Sale | 3,025 | $25K | May 8 | SEC ↗ |
| Director | Sale | 20,000 | $145K | May 7 | SEC ↗ | |
Kenneweg JohnFirst filing | SVP, Sales & Product Marketing | Sale | 7,787 | $53K | May 4 | SEC ↗ |
| SVP, Products and Production | Sale | 2,693 | $19K | Apr 14 | SEC ↗ | |
| SVP, Products and Production | Sale | 18,580 | $131K | Apr 10 | SEC ↗ | |
| SVP, Products and Production | Sale | 5,420 | $38K | Apr 10 | SEC ↗ | |
Brown Christopher D.First filing | Director | Sale | 15,030 | $106K | Apr 10 | SEC ↗ |
Brown Christopher D.First filing | Director | Sale | 7,392 | $52K | Apr 10 | SEC ↗ |
Brown Christopher D.First filing | Director | Sale | 17,578 | $124K | Apr 10 | SEC ↗ |
| SVP, Products and Production | Sale | 7 | $49 | Mar 5 | SEC ↗ | |
Griffith Joseph H. IVFirst in 4 months | Chief Financial Officer | Sale | 23,175 | $143K | Feb 3 | SEC ↗ |
Knopp Kevin J.First filing | President and CEO | Sale | 34,764 | $215K | Feb 3 | SEC ↗ |
| Chief Financial Officer | Sale | 708 | $6K | Oct 6 | SEC ↗ | |
| Chief Financial Officer | Sale | 4,292 | $39K | Oct 6 | SEC ↗ | |
Griffith Joseph H. IVFirst filing | Chief Financial Officer | Sale | 5,000 | $35K | Sep 23 | SEC ↗ |
Related companies
908 Devices Inc. is in the Manufacturing sector.