Summary
Updated Aug 31, 2026
Brett Matthew Hall is CHIEF SCIENTIFIC OFFICER of Immuneering Corp (IMRX). 4 SEC Form 4 filings on record going back to 2025, most recently on 16 June 2026. Most recent open-market trade: bought $25K of IMRX on 16 June 2026. Lifetime open-market purchases: $36K.
Recent Transactions
3Every recent SEC Form 4 transaction Brett Matthew Hall has reported, most recent first.
Trading Pattern
InsiderAlpha's records for Brett Matthew Hall go back to 2025: 4 primary Form 4 filings, an average of 2.0 per year. The typical open-market purchase is $18K (2 buys totaling $36K). The largest single buy on record is $25K of IMRX in 2026. No transaction on record carries a Rule 10b5-1 flag - the filings look discretionary rather than pre-scheduled, which makes their timing more informative as a signal.
Other Insiders Active in the Same Stocks
Insiders who reported open-market trades in the last 12 months at the companies Brett Matthew Hall 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.
- Peter Feinberg - $226K of IMRX open-market activity in the last 12 months
- Thomas J. Schall - $101K of IMRX open-market activity in the last 12 months
- Harold Eugene Brakewood - $25K of IMRX open-market activity in the last 12 months
- Leah R. Neufeld - $16K of IMRX open-market activity in the last 12 months
- Benjamin J. Zeskind - $11K of IMRX open-market activity in the last 12 months
- Michael Bookman - $7K of IMRX 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 Brett Matthew Hall?
Brett Matthew Hall is a corporate insider, tracked as CHIEF SCIENTIFIC OFFICER of Immuneering Corp (IMRX). InsiderAlpha holds 4 primary Form 4 filings for them, the earliest from 2025, updated as new SEC EDGAR filings are processed.
How many SEC Form 4 filings has Brett Matthew Hall submitted recently?
1 primary Form 4 filing in the last 90 days, covering 1 company.
Has Brett Matthew Hall been buying or selling stock?
Recorded transactions: 2 open-market purchases ($36K) and 0 open-market sales across all tracked filings.
Where can I see all of Brett Matthew Hall'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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