SOSV

Managing General Partner Sean O'Sullivan oversees the firm, but investment decisions are made by the nine general partners operating in three location-based teams. SOSV SF, SOSV NY, and HAX in Newark each have dedicated GP-led investment committees that source, select, and support founders within their respective programs. Follow-on investments are approved through a centralized process that draws on all three teams.

SOSV is a venture capital firm that runs structured accelerator-like residency programs. It invests a pre-seed check—up to $550,000—in each accepted company, and founders spend an intensive period in SOSV's labs and offices in San Francisco, New York, or Newark. The firm then continues investing through Series B, making it a multi-stage investor rather than a pure accelerator.

SOSV sources through open applications to its three programs, regular VC-Founder Matchup events, its annual Climate Tech Summit, and the Deep Tech Live series. The firm evaluates founders globally—portfolio companies come from 82 countries—and its general partners actively scout within their technical domains. The firm also publishes an annual SOSV Deep Tech 100 list that surfaces the most promising companies in its portfolio to co-investors.

dlab and Orbit Startups are both funds that originated at SOSV and spun out as independent entities in 2023. dlab focuses on early-stage blockchain infrastructure investing, while Orbit Startups targets high-growth companies in emerging and frontier markets. Both remain part of the SOSV Consortium and maintain close alignment with the parent firm, and SOSV retains investment exposure to some of their portfolio companies.

SOSV operates 85,000 square feet of lab and office space in San Francisco, New York City, and Newark, built with over $75 million in public grants. The labs include biosafety level 1 and 2 wet labs, chemistry labs, mechatronics shops, analytics facilities, and electrical engineering stations. Specialists in Pune, Shenzhen, and Tokyo provide additional design, engineering, and supply-chain support for hardware-heavy startups.

SOSV's limited partners include sovereign wealth funds, corporations, wealth management platforms, and family offices. Named investors include Credit Suisse, the Irish Strategic Investment Fund, Pfizer Ventures, and Honda. In SOSV Fund V, the LP base was 43% North American, 27% European, 23% Asian and Oceania-based, and 3% Middle Eastern.

SOSV is a committed follow-on investor from seed through at least Series B. Beyond its initial pre-seed check, the firm makes approximately 150 follow-on investments per year. The investor relations team actively introduces portfolio founders to SOSV's network of more than 2,700 co-investors and organizes targeted demo days and matchups to support subsequent rounds.