Skip to contentLEFF JONATHAN S — ZYMOGENETICS INC insider: 391 transactions · InsiderLensLEFF JONATHAN S
- Director at Altus Pharmaceuticals Inc. · on record since Jan 25, 2006
- Director at SUNESIS PHARMACEUTICALS INC · on record since Mar 22, 2006
- 10% owner at SUNESIS PHARMACEUTICALS INC · on record since Mar 22, 2006
- Director at NEUROGEN CORP · on record since Mar 16, 2006
- 10% owner at Altus Pharmaceuticals Inc. · on record since Feb 2, 2006
- Director at INTERMUNE INC · on record since May 25, 2006
- Director at ALLOS THERAPEUTICS INC · on record since May 16, 2006
- Director at ZYMOGENETICS INC · on record since Jun 16, 2006
- Director at Chardan Healthcare Acquisition Corp. · on record since Mar 21, 2024
- Director at INSPIRE PHARMACEUTICALS INC · on record since Jul 23, 2007
- Director at Hana Biosciences Inc · on record since Jun 16, 2010
- 10% owner at ZYMOGENETICS INC · on record since Oct 12, 2010
- Director at Larimar Therapeutics, Inc. · on record since May 20, 2026
- Director at NOVELLUS SYSTEMS INC · on record since Jun 16, 2015
- Director at AveXis, Inc. · on record since Feb 12, 2016
- Director at Protara Therapeutics, Inc. · on record since Aug 4, 2017
- Director at ARS Pharmaceuticals, Inc. · on record since Nov 10, 2022
Insider trading activity of LEFF JONATHAN S
- Transactions on record
- 391
- since Nov 26, 2003
- Open-market buys
- 267
- $107.3M
- Open-market sells
- 0
- Companies traded
- 13
- last filing May 20, 2026
Figures computed from official regulatory filings — methodology.
Companies where LEFF JONATHAN S has traded
- Larimar Therapeutics, Inc.7 tx · May 20, 2026
- Chardan Healthcare Acquisition Corp.3 tx · Apr 21, 2025
- Protara Therapeutics, Inc.2 tx · Jun 12, 2018
- AveXis, Inc.2 tx · Feb 12, 2016
- NOVELLUS SYSTEMS INC2 tx · Sep 15, 2015
- INTERMUNE INC52 tx · $30.3M · Mar 1, 2013
- ALLOS THERAPEUTICS INC14 tx · $20.6M · Sep 5, 2012
- Hana Biosciences Inc6 tx · $9.9M · Feb 22, 2012
- INSPIRE PHARMACEUTICALS INC13 tx · $154.5M · May 16, 2011
Track record of LEFF JONATHAN S
Statistical track record
Free- Open-market buys
- 270
- Last buy
- Jan 26, 2010
Win rates and median returns are available with a free account (5 insiders/month).
Create a free account→Transaction history of LEFF JONATHAN S
Co-insiders of LEFF JONATHAN S
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246 tx · $101.2M · Oct 12, 2010
HEN STEWARTALLOS THERAPEUTICS INC +2
| Company | Filed | Type | Qty | Price | Value · USD | Src |
|---|
| May 20, 2026 | AwardD | 55,150 | 0.00 USD | $0 | SEC |
| May 14, 2025 | AwardD | 19,000 | 0.00 USD | $0 | SEC |
| Apr 21, 2025 | AwardD | 17,600 | 0.00 USD | $0 | SEC |
| Apr 18, 2025 | AwardD | -17,600 | 0.00 USD | $0 | SEC |
| Jul 15, 2024 | AwardD | 264,000 | 0.00 USD | $0 | SEC |
| May 31, 2024 | AwardD | 19,000 | 0.00 USD | $0 | SEC |
| May 11, 2023 | AwardD | 8,300 | 0.00 USD | $0 | SEC |
| May 12, 2022 | AwardD | 8,300 | 0.00 USD | $0 | SEC |
| May 17, 2021 | AwardD | 8,300 | 0.00 USD | $0 | SEC |
| Sep 30, 2020 | AwardD | 16,600 | 0.00 USD | $0 | SEC |
| Jun 12, 2018 | AwardD | 12,700 | 0.00 USD | $0 | SEC |
| Aug 4, 2017 | AwardD | 13,333 | 0.00 USD | $0 | SEC |
| Feb 12, 2016 | AwardD | 8,385 | 0.00 USD | $0 | SEC |
| Feb 12, 2016 | AwardD | 18,111 | 0.00 USD | $0 | SEC |
| Sep 15, 2015 | AwardD | 7,650 | 0.00 USD | $0 | SEC |
| Jul 20, 2015 | AwardD | 11,475 | — | — | SEC |
| Mar 1, 2013 | Other | -7,108 | 8.79 USD | $62.5K | SEC |
| Sep 5, 2012 | Other | -55,000 | 1.82 USD | $100.1K | SEC |
| Jun 6, 2012 | Award | 2,500 | 10.10 USD | $25.3K | SEC |
| Jun 6, 2012 | AwardD | 6,000 | 0.00 USD | $0 | SEC |
| Feb 22, 2012 | AwardD | 35,000 | 0.00 USD | $0 | SEC |
| Jan 10, 2012 | AwardD | 1 | — | — | SEC |
| Jan 10, 2012 | AwardD | 99,000 | 100.00 USD | $9.9M | SEC |
| Dec 15, 2011 | Award | 55,000 | 0.00 USD | $0 | SEC |
| Jun 23, 2011 | AwardD | 20,000 | 2.06 USD | $41.2K | SEC |