Other insiders active in the same stocks
Insiders who reported open-market trades in the last 12 months at the companies Jonathan S. Leff 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.
- Reuven Yeganeh - $33.32M in HLSQ purchases and sales in the last 12 months
- James E. Flynn - $25.00M in LRMR purchases and sales in the last 12 months
- Thomas Edward Hamilton - $667K in LRMR purchases and sales in the last 12 months
- Jeffrey W. Sherman - $25K in LRMR purchases and sales in the last 12 months
- Frank E. Thomas - $25K in LRMR purchases and sales in the last 12 months
More insiders (A-Z)
Browse nearby insider profiles in alphabetical order.
Frequently asked questions
Who is Jonathan S. Leff?
Jonathan S. Leff is a corporate insider of Larimar Therapeutics, Inc. (LRMR). InsiderAlpha holds 3 primary Form 4 filings for them, the earliest from 2025, updated as new SEC EDGAR filings are processed.
When did Jonathan S. Leff last file a Form 4?
The most recent primary Form 4 on record is dated 20 May 2026, one of 3 filings going back to 2025.
