JONATHAN S LEFF
CIK 1215242 · last filed 2026-05-20
JONATHAN S LEFF is a corporate insider who has filed 73 SEC Form 4 insider transactions across 12 companies since 2007. The most recent filing, for LRMR, was dated May 20, 2026. Across all open-market trades the lifetime net is +$72.3M, making them a net buyer over the disclosed history.
"Disclosed insider exposure" sums this person's most-recently-reported share counts across each company they're an insider in, multiplied by the current underlying price. It is not net worth — it misses retail holdings, private investments, real estate, index funds, and any company where the person isn't an SEC-reporting insider. For informational purposes only.
$0
12
73
$72.28M
Holdings By Company
| Symbol | Role | Shares | Price | Disclosed Exposure | Lifetime OM Net | Filings | Latest Filed |
|---|---|---|---|---|---|---|---|
| LRMR | Director | — | $3.47 | — | $0 | 7 | 2026-05-20 |
| PHGE | Director | — | $0.54 | — | $0 | 2 | 2025-04-21 |
| BiomX Inc. (PHGE.U) Delisted | Director | — | $0.90 | — | $0 | 1 | 2024-07-15 |
| PRTO | Director | — | $27.65 | — | $0 | 2 | 2018-06-12 |
| AveXis, Inc. (AVXS) Delisted | Director | — | — | — | $0 | 1 | 2016-02-12 |
| ALPINE IMMUNE SCIENCES, INC. (NVLS) Delisted | Director | — | — | — | $0 | 2 | 2015-09-15 |
| ALLOS THERAPEUTICS INC (ALTH) Delisted | Director | 26,124,430 | — | — | $19.74M | 8 | 2012-09-05 |
| INSPIRE PHARMACEUTICALS INC (ISPH) Delisted | Director | 0 | — | — | $40.00M | 6 | 2011-05-16 |
| ZYMOGENETICS INC (ZGEN) Delisted | Director | 0 | $12.01 | $0 | $9.54M | 13 | 2010-10-12 |
| NEUROGEN CORP (NRGN) Delisted | Director | 13,571,411 | — | — | $0 | 10 | 2008-07-28 |
| Altus Pharmaceuticals Inc. (ALTU) Delisted | Director | — | $10.12 | — | $0 | 3 | 2008-06-13 |
| Viracta Therapeutics, Inc. (SNSS) Delisted | Director | 4,304,075 | $18.62 | $80.14M | $3.00M | 3 | 2008-06-05 |
Recent Filings
73 filings| Filed | Symbol | Action | Net Shares | Net $ | Link |
|---|---|---|---|---|---|
| 2026-05-20 | LRMR | Grant (A) | — | $0 | EDGAR |
| 2025-05-14 | LRMR | Grant (A) | — | $0 | EDGAR |
| 2025-04-21 | PHGE | Grant (A) | — | $0 | EDGAR |
| 2025-04-18 | PHGE | Grant (A) | — | $0 | EDGAR |
| 2024-07-15 | BiomX Inc. (PHGE.U) Delisted | Grant (A) | — | $0 | EDGAR |
| 2024-05-31 | LRMR | Grant (A) | — | $0 | EDGAR |
| 2023-05-11 | LRMR | Grant (A) | — | $0 | EDGAR |
| 2022-05-12 | LRMR | Grant (A) | — | $0 | EDGAR |
| 2021-05-17 | LRMR | Grant (A) | — | $0 | EDGAR |
| 2020-09-30 | LRMR | Grant (A) | — | $0 | EDGAR |