MASS Insider Trading Activity and SEC Form 4 Filings
MASS insider trading summary
Over the past 12 months, insiders at 908 Devices Inc. (MASS) reported 52 sales worth $9.0M by 6 insiders and no open-market purchases on SEC Form 4. Net insider selling was $9.0M.
Latest MASS insider buys and sells
| Date | Insider | Role | Type | Value |
|---|---|---|---|---|
| Nov 4, 2026 | Christopher D. Brown | Insider | Sell | $329K (30,000 @ $10.95) |
| Oct 7, 2026 | Christopher D. Brown | Insider | Sell | $357K (30,000 @ $11.89) |
| Oct 6, 2026 | Joseph H. Griffith IV | Chief Financial Officer | Sell | $65K (5,000 @ $13.03) |
| Sep 29, 2026 | AWM Investment Company, Inc. | 10% Owner | Sell | $207K (18,000 @ $11.52) |
| Sep 24, 2026 | AWM Investment Company, Inc. | 10% Owner | Sell | $273K (24,000 @ $11.36) |
| Sep 23, 2026 | AWM Investment Company, Inc. | 10% Owner | Sell | $11K (1,000 @ $11.25) |
| Sep 17, 2026 | John Kenneweg | SVP, Sales & Product Marketing | Sell | $54K (5,257 @ $10.22) |
| Sep 16, 2026 | John Kenneweg | SVP, Sales & Product Marketing | Sell | $216K (21,399 @ $10.11) |
| Sep 15, 2026 | John Kenneweg | SVP, Sales & Product Marketing | Sell | $10K (1,000 @ $10.00) |
| Sep 2, 2026 | Christopher D. Brown | Insider | Sell | $317K (30,000 @ $10.58) |
Source: SEC Form 4 filings. Open-market purchases (code P) and sales (code S) only; option exercises, grants and gifts are excluded.