Summary
Updated Aug 31, 2026
Christopher D. Brown is Director of 908 Devices Inc. (MASS). 12 SEC Form 4 filings on record going back to 2024, most recently on 12 August 2026. Most recent open-market trade: sold $77K of MASS on 12 August 2026. Lifetime open-market sales: $1.49M.
Recent Transactions
17Every recent SEC Form 4 transaction Christopher D. Brown has reported, most recent first.
Trading Pattern
InsiderAlpha's records for Christopher D. Brown go back to 2024: 12 primary Form 4 filings, an average of 4.0 per year. 13 recorded transactions carry a Rule 10b5-1 flag, meaning they were pre-scheduled under a written trading plan rather than discretionary.
Other Insiders Active in the Same Stocks
Insiders who reported open-market trades in the last 12 months at the companies Christopher D. Brown files at. Multiple unrelated insiders buying the same stock within a short window, cluster buying, has historically been one of the strongest Form 4 signals.
- AWM Investment Company, Inc. - $3.68M of MASS open-market activity in the last 12 months
- Kevin J. Knopp - $2.55M of MASS open-market activity in the last 12 months
- Joseph H. Griffith IV - $412K of MASS open-market activity in the last 12 months
- John Kenneweg - $201K of MASS open-market activity in the last 12 months
- Kevin J. McCallion - $188K of MASS open-market activity in the last 12 months
More Notable Insiders
Other corporate insiders with significant SEC Form 4 track records on InsiderAlpha:
Frequently Asked Questions
Who is Christopher D. Brown?
Christopher D. Brown is a corporate insider, tracked as Director of 908 Devices Inc. (MASS). InsiderAlpha holds 12 primary Form 4 filings for them, the earliest from 2024, updated as new SEC EDGAR filings are processed.
How many SEC Form 4 filings has Christopher D. Brown submitted recently?
7 primary Form 4 filings in the last 90 days, covering 1 company.
Has Christopher D. Brown been buying or selling stock?
Recorded transactions: 0 open-market purchases and 13 open-market sales ($1.49M) across all tracked filings.
Where can I see all of Christopher D. Brown's SEC filings?
All Form 4 filings, transaction values, and 10b5-1 plan flags are listed on this page and updated in real time as new SEC EDGAR filings are processed.
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