Jonathan Leff
Executive Partner, Private Equity @ Sofinnova Investments
Menlo Park, United States
Jonathan Leff is a Series A investor at Sofinnova Investments in Menlo Park focused on Biotechnology and Medical. Jonathan Leff currently works as a Board Member for Axonis Therapeutics. He previously worked at Aerovate Therapeutics as a Board Member. Jonathan Leff attended the University of Pennsylvania.
- Total investments:
- 3
- Last investment:
- Lead investor:
- 33%
Last updated:
For AI agents: llms.txt
Industries Jonathan Leff invests in
Stages Jonathan Leff invests in
Countries Jonathan Leff invests in
Contacts
| Type | Contact | Validation |
|---|---|---|
| Work email | ||
| Personal email | ||
| Work phone | ||
| Personal phone | ||
| Socials |
Investment Focus
Industry
- Biotechnology 2 (67%)
- Medical 1 (33%)
Stage
- Series A 2 (67%)
- Series B 1 (33%)
Investments
| Company | Description | Round | Links |
|---|---|---|---|
| Expedition Therapeutics operates as an unincorporated association. | $115M / Series B / Aug 05, 2026 | ||
| Expedition Therapeutics operates as an unincorporated association. | $165M / Series A / Oct 09, 2025 | ||
| Axonis translates breakthrough regeneration research to groundbreaking paralysis therapy, to transform the lives of spinal cord injury patients. | $115M / Series A / Oct 30, 2024 |
Co-Investors
About Sofinnova Investments
Sofinnova Ventures has partnered with entrepreneurs to secure initial funding, build successful teams, win key customers, and navigate acquisitions and IPOs. Sofinnova Ventures invests in Life Science and Technology start-ups. Their professionals are seasoned business operators, possessing deep domain and investment expertise. They know how to helpentrepreneurs build successful, global businesses.
Sofinnova Investments Contacts
| Name | Phone | Socials | |
|---|---|---|---|
Jakob Dupont
Executive Partner
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James Healy
General Partner & President
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Jonathan Leff
Executive Partner, Private Equity
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Lesley Weber
San Diego Office Manager & EA
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Maha Radhakrishnan
Executive Partner
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FAQ
What does Jonathan Leff invest in?
Jonathan Leff invests primarily in Biotechnology and Medical startups, most often at Series A and Series B stage. Most of the 3 investments tracked by Shizune back companies in United States. The Investment Focus section breaks down every industry, stage and country in the portfolio.
How do I contact Jonathan Leff?
Public channels for Jonathan Leff include LinkedIn. For a verified work email and phone number, create a free Shizune account — contact data is searched across 20+ sources and validated before delivery, so your outreach lands in the right inbox.
When did Jonathan Leff last invest?
The most recent investment recorded for Jonathan Leff closed in Aug 2026. Shizune tracks 3 investments in total for this profile, including round sizes, stages and portfolio companies, all sourced from confirmed public funding rounds and refreshed monthly.
Is Shizune's investor data accurate?
Yes — every stat on this profile is calculated from confirmed public funding rounds monitored across hundreds of sources since 2020. This profile was last refreshed in Oct 2026 and is updated monthly. Spotted something off? Use the “Suggest an edit” link near the top of the page.
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