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- Christopher D. Brown - DirectorOpen-market sale$357K
About 908 Devices Inc. (MASS)
908 Devices Inc. files with the SEC under CIK 0001555279 and is classified as measuring and controlling devices, nec. It is grouped with Information Technology companies on this site.
MASS Form 4 activity by transaction type, last 90 days
| Form 4 transaction type | Transactions | Shares | Total value |
|---|---|---|---|
| Open-market sale | 22 | 461,550 | $4.67M |
| Option exercise | 10 | 185,696 |
Dollar totals cover purchases and sales only (codes P and S). Grants, option exercises, gifts and tax withholding are counted in shares, because none of them is a trade at a market price.
MASS insider transactions (Form 4)
7159 Form 4 filings on record, the earliest from Dec 16, 2024, newest first. Filing history page 1 of 2.
| Date | Insider | Transaction | Security | Shares | Price | Value |
|---|---|---|---|---|---|---|
| Christopher D. Brown - Director | Open-market sale | Common Stock | 30,000 | $11.89 footnote F2 | $357K | |
| Christopher D. Brown - Director | Option exercise | Common Stock | 60,000 | $1.75 | $105K | |
| Christopher D. Brown - Director | Option exercise | Stock Option (option to buy) | 60,000 | $0.00 | - | |
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| Joseph H. Griffith IV - Officer | Open-market sale | Common Stock | 5,000 | $13.03 | $65K | |
| AWM Investment Company, Inc. - 10% Owner | Open-market sale | Common Stock | 18,000 footnote F2,F3 | $11.52 footnote F1 | $207K | |
| ||||||
| AWM Investment Company, Inc. - 10% Owner | Open-market sale | Common Stock | 1,000 | $11.25 footnote F1 | $11K | |
| AWM Investment Company, Inc. - 10% Owner | Open-market sale | Common Stock | 24,000 footnote F2,F3 | $11.36 footnote F1 | $273K | |
| ||||||
| John Kenneweg - Officer | Option exercise | Common Stock | 1,000 | $0.96 | $960 | |
| John Kenneweg - Officer | Open-market sale | Common Stock | 1,000 | $10.00 | $10K | |
| John Kenneweg - Officer | Option exercise | Common Stock | 21,399 | $0.96 | $21K | |
| John Kenneweg - Officer | Open-market sale | Common Stock | 21,399 | $10.11 footnote F2 | $216K | |
| John Kenneweg - Officer | Option exercise | Common Stock | 5,257 | $0.96 | $5K | |
| John Kenneweg - Officer | Open-market sale | Common Stock | 5,257 | $10.22 footnote F3 | $54K | |
| John Kenneweg - Officer | Option exercise | Stock Option (right to buy) | 1,000 | $0.00 | - | |
| John Kenneweg - Officer | Option exercise | Stock Option (right to buy) | 21,399 | $0.00 | - | |
| John Kenneweg - Officer | Option exercise | Stock Option (right to buy) | 5,257 | $0.00 | - | |
| ||||||
| Christopher D. Brown - Director | Open-market sale | Common Stock | 30,000 | $10.58 footnote F2 | $317K | |
| ||||||
| Joseph H. Griffith IV - Officer | Open-market sale | Common Stock | 11,459 | $10.95 footnote F2 | $125K | |
| ||||||
| AWM Investment Company, Inc. - 10% Owner | Open-market sale | Common Stock | 8,422 | $10.52 footnote F1 | $89K | |
| AWM Investment Company, Inc. - 10% Owner | Open-market sale | Common Stock | 41,578 footnote F2,F3 | $10.61 footnote F1 | $441K | |
| ||||||
| Kevin J. Knopp - Officer | Open-market sale | Common Stock | 7,622 | $10.06 footnote F2 | $77K | |
| Kevin J. Knopp - Officer | Open-market sale | Common Stock | 20,000 | $10.35 footnote F3 | $207K | |
| ||||||
| Christopher D. Brown - Director | Open-market sale | Common Stock | 9,442 | $9.03 footnote F2 | $85K | |
| Christopher D. Brown - Director | Open-market sale | Common Stock | 8,358 | $9.23 footnote F3 | $77K | |
| ||||||
| Kevin J. Knopp - Officer | Open-market sale | Common Stock | 348 | $9.06 footnote F2 | $3K | |
| Kevin J. Knopp - Officer | Open-market sale | Common Stock | 115,748 | $9.83 footnote F3 | $1.14M | |
| Kevin J. Knopp - Officer | Open-market sale | Common Stock | 30,170 | $10.16 footnote F4 | $307K | |
| Kevin J. Knopp - Officer | Open-market sale | Common Stock | 2,747 | $10.07 footnote F5 | $28K | |
| ||||||
| Christopher D. Brown - Director | Open-market sale | Common Stock | 20,000 | $8.49 footnote F2 | $170K | |
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| AWM Investment Company, Inc. - 10% Owner | Open-market sale | Common Stock | 50,000 footnote F2,F3 | $8.36 footnote F1 | $418K | |
| ||||||
| Brandi C. Vann - Director | Option exercise | Common Stock | 5,192 | - footnote F1 | - | |
| Brandi C. Vann - Director | Option exercise | Restricted Stock Unit | 5,192 | $0.00 | - | |
| ||||||
| Kevin J. Knopp - Officer | Open-market sale | Common Stock | 222 | $9.07 footnote F2 | $2K | |
| ||||||
| Christopher D. Brown | Open-market sale | Common Stock | 2,200 | $9.02 footnote F2 | $20K | |
| ||||||
| Christopher D. Brown | Open-market sale | Common Stock | 20,000 | $8.84 footnote F2 | $177K | |
| ||||||
| Kevin J. Knopp - Officer | Open-market sale | Common Stock | 2,798 | $9.09 footnote F2 | $25K | |
| ||||||
| Christopher D. Brown | Open-market sale | Common Stock | 9,900 | $9.04 footnote F2 | $89K | |
| ||||||
| Kevin J. Knopp - Officer | Open-market sale | Common Stock | 3,422 | $9.06 footnote F2 | $31K | |
| Kevin J. Knopp - Officer | Open-market sale | Common Stock | 40,535 | $9.14 footnote F3 | $370K | |
| Kevin J. Knopp - Officer | Open-market sale | Common Stock | 16,388 | $9.10 footnote F4 | $149K | |
| ||||||
| Michele M. Leonhart | Option exercise | Restricted Stock Units | 6,486 | $0.00 | - | |
| Michele M. Leonhart | Option exercise | Common Stock | 6,486 | - footnote F1 | - | |
| ||||||
| AWM Investment Company, Inc. - 10% Owner | Open-market sale | Common Stock | 4,668 | $8.99 footnote F1 | $42K | |
| AWM Investment Company, Inc. - 10% Owner | Open-market sale | Common Stock | 3,050 | $9.00 footnote F1 | $27K | |
| ||||||
| Brandi C. Vann | Grant or award | Restricted Stock Units | 13,656 | $0.00 | - | |
| Brandi C. Vann | Grant or award | Stock Option (option to buy) | 6,209 | $0.00 | - | |
| Michele M. Leonhart | Grant or award | Stock Option (option to buy) | 6,209 | $0.00 | - | |
| Michele M. Leonhart | Option exercise | Common Stock | 14,083 | - footnote F1 | - | |
| Michele M. Leonhart | Option exercise | Restricted Stock Units | 14,083 | $0.00 | - | |
| Michele M. Leonhart | Grant or award | Restricted Stock Units | 13,656 | $0.00 | - | |
| ||||||
| E. Kevin Hrusovsky | Option exercise | Common Stock | 14,083 | - footnote F1 | - | |
| E. Kevin Hrusovsky | Option exercise | Restricted Stock Units | 14,083 | $0.00 | - | |
| E. Kevin Hrusovsky | Grant or award | Restricted Stock Units | 13,656 | $0.00 | - | |
| E. Kevin Hrusovsky | Grant or award | Stock Option (option to buy) | 6,209 | $0.00 | - | |
| ||||||
| Anthony Hunt | Grant or award | Restricted Stock Units | 13,656 | $0.00 | - | |
| Anthony Hunt | Grant or award | Stock Option (option to buy) | 6,209 | $0.00 | - | |
| Anthony Hunt | Option exercise | Common Stock | 14,083 | - footnote F1 | - | |
| Anthony Hunt | Option exercise | Restricted Stock Units | 14,083 | $0.00 | - | |
| ||||||
| Fenel M. Eloi | Option exercise | Restricted Stock Units | 14,083 | $0.00 | - | |
| Fenel M. Eloi | Grant or award | Restricted Stock Units | 13,656 | $0.00 | - | |
| Fenel M. Eloi | Option exercise | Common Stock | 14,083 | - footnote F1 | - | |
| Fenel M. Eloi | Grant or award | Stock Option (option to buy) | 6,209 | $0.00 | - | |
| ||||||
| Keith Crandell | Option exercise | Restricted Stock Units | 14,083 | $0.00 | - | |
| Keith Crandell | Grant or award | Restricted Stock Units | 13,656 | $0.00 | - | |
| Keith Crandell | Grant or award | Stock Option (option to buy) | 6,209 | $0.00 | - | |
| Keith Crandell | Option exercise | Common Stock | 14,083 | - footnote F1 | - | |
| ||||||
| Mark Spoto | Grant or award | Restricted Stock Units | 13,656 | $0.00 | - | |
| Mark Spoto | Grant or award | Stock Option (option to buy) | 6,209 | $0.00 | - | |
| Mark Spoto | Option exercise | Common Stock | 14,083 | - footnote F1 | - | |
| Mark Spoto | Option exercise | Restricted Stock Units | 14,083 | $0.00 | - | |
| ||||||
| Christopher D. Brown | Open-market sale | Common Stock | 100 | $9.00 | $900 | |
Item 2.02, 9.01
Item 8.01
Item 5.07
Item 1.01, 2.01, 2.02, 3.02, 7.01, 9.01
Recent MASS Form 144 notices of proposed sale
3An insider files Form 144 before selling restricted or control stock. It announces a planned sale. If the sale goes ahead, it shows up later on a Form 4.
| Filed | Filer | Relationship | Shares | Market value | Notice |
|---|---|---|---|---|---|
| Joseph Griffith | Officer | 5,000 | $64K | View on EDGAR | |
| John Kenneweg | Officer | 27,656 |
MASS insider trading FAQ
What is the latest insider trade for MASS?
908 Devices Inc. (MASS) had 14 insider filings in the last 90 days, with the most recent on 2026-10-09. The full record for MASS runs to 59 Form 4 filings, the earliest from 2024-12-16. InsiderAlpha adds new Form 4, Form 144 and 8-K filings as they arrive from SEC EDGAR.
How many insiders are buying MASS stock?
No insider purchases of MASS were filed in the last 90 days.
How many insiders are selling MASS stock?
22 insider sales of MASS were filed in the last 90 days, totaling $4.67M.
Where can I see MASS SEC filings (Form 4, 10-K, 10-Q, 8-K)?
This page collects MASS Form 4 insider transactions, Form 144 sale notices and 8-K filings in one place. Annual 10-K and quarterly 10-Q reports live on the company's SEC EDGAR page.
More Information Technology companies with insider activity
Recent insider filings
10The EDGAR links open each original Form 4, so you can check any number on this page against the filing it came from.
- - Christopher D. Brown view on EDGAR
- - Joseph H. Griffith IV view on EDGAR
- - AWM Investment Company, Inc. view on EDGAR
- - AWM Investment Company, Inc. view on EDGAR
- - John Kenneweg view on EDGAR
- - Christopher D. Brown view on EDGAR
- - Joseph H. Griffith IV view on EDGAR
- - AWM Investment Company, Inc. view on EDGAR
- - Kevin J. Knopp view on EDGAR
Related companies with recent insider activity
Learn more
- Insider selling: signal or noise?
- Why most insider sales are routine, and the few patterns worth a second look.
- Form 144 vs Form 4
- A Form 144 announces a planned sale; the Form 4 reports it after it happens.
- Insider activity in Information Technology
- Where MASS's peers are being bought and sold.
- Every recent Form 4
- The market-wide feed, updated as filings arrive from SEC EDGAR.
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