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Jonathan Leff

Angel · Maryland

Board director at 6 startups that filed Form D raises since late 2024, mostly in Maryland.

Stages: Seed to Growth
Typical check (est.): Not disclosed
Latest fund: None on file
Last verified activity: Nov 2024

Focus

Biotech & Pharma

Recent portfolio activity

Axonis Therapeutics
Board seat · MA
Nov 2024
Elion Therapeutics
Board seat · NY
Jun 2024
Avalyn Pharma
Board seat · WA
Oct 2023
Dracen Pharmaceuticals
Board seat · CA
Aug 2023
Adaptive Phage Therapeutics
Board seat · MD
Jun 2023
BiomX
Board seat · L3
Mar 2023

Sources

SEC Form D: BiomXMar 3, 2023
SEC Form D: Adaptive Phage TherapeuticsJun 9, 2023
SEC Form D: Dracen PharmaceuticalsAug 10, 2023
SEC Form D: Avalyn PharmaOct 10, 2023
SEC Form D: Elion TherapeuticsJun 26, 2024
SEC Form D: Axonis TherapeuticsNov 1, 2024

Profile last verified Oct 12, 2026. Is this you? Correct or remove this profile.