Jeff Klunzinger is the Co-Founder and Managing Partner of OS Fund. See sector focus and contact routes.
Jeff Klunzinger is the Co-Founder and Managing Partner of OS Fund, a venture capital firm he established in 2014 with two decades of experience leading or participating in over 100 venture deals. His investment thesis targets deep science-driven companies in biotech, health, agtech, and AI, spanning pre-seed to Series A stages with a focus on life sciences, food systems, and computational biology. While specific check sizes and lead/follow behavior are not publicly detailed, his portfolio includes board seats at Arzeda and NuMat Technologies, indicating active involvement. Notable portfolio companies include Arzeda, a synthetic biology firm, and NuMat Technologies, which develops advanced material storage solutions. Klunzinger also serves on the boards of these companies and has held executive roles at BRJ Ventures and Os Acquisition Corp., reflecting his broader engagement in deep science commercialization. He maintains a public presence as a founder and GP at OS Fund, with a Medium profile under his name, though no distinctive public writing or unique point of view is explicitly documented in available sources.
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