Summary
Updated Aug 31, 2026
Melvin K. Spigelman files SEC Form 4 reports at AN2 Therapeutics, Inc. (ANTX). 2 SEC Form 4 filings on record, most recently on 23 March 2026.
Trading Pattern
InsiderAlpha's records for Melvin K. Spigelman go back to 2026: 2 primary Form 4 filings, an average of 2.0 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 Melvin K. Spigelman 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.
- Robin Shane Readnour - $213K of ANTX open-market activity in the last 12 months
- Joshua M. Eizen - $53K of ANTX open-market activity in the last 12 months
- Sanjay Chanda - $9K of ANTX open-market activity in the last 12 months
- Lucy Day - $9K of ANTX open-market activity in the last 12 months
- Stephen David Prior - $7K of ANTX open-market activity in the last 12 months
- Sarah Joanne Williams - $2K of ANTX 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 Melvin K. Spigelman?
Melvin K. Spigelman is a corporate insider of AN2 Therapeutics, Inc. (ANTX). InsiderAlpha holds 2 primary Form 4 filings for them, the earliest from 2026, updated as new SEC EDGAR filings are processed.
When did Melvin K. Spigelman last file a Form 4?
The most recent primary Form 4 on record is dated 23 March 2026, one of 2 filings going back to 2026.
Where can I see all of Melvin K. Spigelman'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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