Summary
Updated Aug 31, 2026
Zachary Prensky files SEC Form 4 reports at LB PHARMACEUTICALS INC (LBRX). 1 SEC Form 4 filing on record, dated 10 September 2025.
Trading Pattern
InsiderAlpha's records for Zachary Prensky go back to 2025: 1 primary Form 4 filing, an average of 0.5 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 Zachary Prensky 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.
- Deep Track Biotechnology Master Fund, Ltd. - $60.00M of LBRX open-market activity in the last 12 months
- Pontifax Management 4 G.P. (2015) Ltd. - $15.00M of LBRX open-market activity in the last 12 months
- Ran Nussbaum - $15.00M of LBRX open-market activity in the last 12 months
- Vida Ventures GP III, L.L.C. - $5.00M of LBRX 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 Zachary Prensky?
Zachary Prensky is a corporate insider of LB PHARMACEUTICALS INC (LBRX). InsiderAlpha holds 1 primary Form 4 filing for them, the earliest from 2025, updated as new SEC EDGAR filings are processed.
When did Zachary Prensky last file a Form 4?
The only primary Form 4 on record is dated 10 September 2025.
Where can I see all of Zachary Prensky'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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