SOSV is a global venture capital firm specializing in deep tech investments, focusing on human and planetary health. Founded in 1995 by Sean O'Sullivan, the firm is headquartered in Princeton, New Jersey, with additional offices in Cork, New York City, Newark, Pune, San Francisco, Shenzhen, and Tokyo. SOSV offers multi-stage funding, starting with its startup development programs, IndieBio and HAX, located in New York City, Newark, and San Francisco.

The firm has a strong emphasis on sectors such as climate technology, industrial automation, and human health. Notable companies in its portfolio include Opentrons, Formlabs, NotCo, Prolific Machines, unSpun, Neptune Robotics, Smartex, and BitMEX. As of April 2024, SOSV closed its fifth core fund, totaling $306 million, underscoring its commitment to supporting innovative startups addressing global challenges.