Summary
Updated Aug 31, 2026
Thomas J. Gunderson files SEC Form 4 reports at TransMedics Group, Inc. (TMDX). 4 SEC Form 4 filings on record, most recently on 17 June 2026. Most recent open-market trade: sold $722K of TMDX on 17 June 2026. Lifetime open-market sales: $722K.
Recent Transactions
6Every recent SEC Form 4 transaction Thomas J. Gunderson has reported, most recent first.
Other Insiders Active in the Same Stocks
Insiders who reported open-market trades in the last 12 months at the companies Thomas J. Gunderson 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.
- Gerardo Hernandez - $1.25M of TMDX open-market activity in the last 12 months
- David Weill - $1.22M of TMDX open-market activity in the last 12 months
- Waleed H. Hassanein - $1.00M of TMDX open-market activity in the last 12 months
- Anil P. Ranganath - $556K of TMDX open-market activity in the last 12 months
- Edward M. Basile - $540K of TMDX open-market activity in the last 12 months
- Nicholas Corcoran - $413K of TMDX 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 Thomas J. Gunderson?
Thomas J. Gunderson is a corporate insider of TransMedics Group, Inc. (TMDX). InsiderAlpha holds 4 primary Form 4 filings for them, the earliest from 2026, updated as new SEC EDGAR filings are processed.
How many SEC Form 4 filings has Thomas J. Gunderson submitted recently?
1 primary Form 4 filing in the last 90 days, covering 1 company.
Has Thomas J. Gunderson been buying or selling stock?
Recorded transactions: 0 open-market purchases and 1 open-market sale ($722K) across all tracked filings.
Where can I see all of Thomas J. Gunderson'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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