Summary
Updated Aug 31, 2026
Gregory M. Sullivan is Chief Medical Officer of Tonix Pharmaceuticals Holding Corp. (TNXP). 1 SEC Form 4 filing on record, dated 26 February 2026.
Trading Pattern
InsiderAlpha's records for Gregory M. Sullivan go back to 2026: 1 primary Form 4 filing, an average of 1.0 per year. 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 Gregory M. Sullivan 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.
- Seth Lederman - $345K of TNXP open-market activity in the last 12 months
- Richard Newcomb Stillwell - $58K of TNXP open-market activity in the last 12 months
- Carolyn E. Taylor - $15K of TNXP open-market activity in the last 12 months
- Richard H. Bagger - $13K of TNXP 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 Gregory M. Sullivan?
Gregory M. Sullivan is a corporate insider, tracked as Chief Medical Officer of Tonix Pharmaceuticals Holding Corp. (TNXP). InsiderAlpha holds 1 primary Form 4 filing for them, the earliest from 2026, updated as new SEC EDGAR filings are processed.
When did Gregory M. Sullivan last file a Form 4?
The only primary Form 4 on record is dated 26 February 2026.
Where can I see all of Gregory M. Sullivan'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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