SOSV Team at Sosv, New York, New York, United States — SOSV is a global venture capital firm founded in 1995 by Sean. See sector focus and contact routes.
SOSV is a global venture capital firm founded in 1995 by Sean O’Sullivan that operates as “The First Check in Deep Tech®” by combining capital with startup development programs like IndieBio and HAX[1][8]. The firm invests at pre-seed, seed, Series A, and later stages exclusively in deep tech sectors including climate tech, health tech, physical AI, robotics, and biotech, with a focus on founders addressing human and planetary health[1][5]. Initial checks typically range from $250,000 to $550,000 at the pre-seed stage, and SOSV often leads early investments while offering follow-on capital through a $100 million Select Fund[5][9]. Notable portfolio companies include unicorns and IPOs such as Recursion Pharmaceuticals, Ginkgo Bioworks, and Intellia, with the firm having funded over 961 companies total[5]. SOSV distinguishes itself by providing 85,000 square feet of in-house labs and manufacturing facilities to democratize deep tech innovation across all geographies[8]. The firm publicly articulates that transformative companies emerge when rigorous science and engineering are combined with entrepreneurial vision, emphasizing ecosystem support over pure capital deployment[8].
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