Jonathan Leff is an Executive Partner at Sofinnova Investments, where he invests in Series A through post-IPO equity and private equity rounds across biotechnology, pharmaceuticals, drug development, life sciences, healthcare, and medical innovation. He serves on the boards of Axonis Therapeutics, NorthSea Therapeutics, and Avalyn Pharma, and has invested in companies like AveXis, Audentes Therapeutics, Mirum Pharmaceuticals, Adaptive Phage Therapeutics, and BIOMx. Before Sofinnova, he held R&D and CMO leadership roles at Ascendis Pharma A/S, InterMune, KaloBios, Halozyme Therapeutics, and Roche. He attended the University of Pennsylvania and lives in Menlo Park, California.
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