Summary
Updated Aug 30, 2026
John Jefferies is Chief Medical Officer of DAXOR CORP (DXR). 2 SEC Form 4 filings on record going back to 2025, most recently on 24 March 2026.
Recent Transactions
3Every recent SEC Form 4 transaction John Jefferies 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 John Jefferies 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.
- Robert J. Michel - $10K of DXR open-market activity in the last 12 months
- Michael Richard Feldschuh - $9K of DXR open-market activity in the last 12 months
- Jonathan Adam Feldschuh - of DXR 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 John Jefferies?
John Jefferies is a corporate insider, tracked as Chief Medical Officer of DAXOR CORP (DXR). InsiderAlpha holds 2 primary Form 4 filings for them, the earliest from 2025, updated as new SEC EDGAR filings are processed.
When did John Jefferies last file a Form 4?
The most recent primary Form 4 on record is dated 24 March 2026, one of 2 filings going back to 2025.
Has John Jefferies been buying or selling stock?
Recorded transactions: 3 open-market purchases and 0 open-market sales across all tracked filings.
Where can I see all of John Jefferies'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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