We Are SOSV
SOSV’s mission is to fund amazing deep tech founders right at inception—often their very first check. SOSV’s General Partners work side-by side with those founders to help ensure they build incredible companies that have a profound impact on human and planetary health.
Background
SOSV is the world’s most active deep tech, pre-seed venture capital firm, and SOSV uniquely offers its founders deeply resourced labs, offices and events spaces in San Francisco, New York City, and Newark . In addition, SOSV has offices in Cork (Ireland / EU), Pune (India), Shenzhen (China), and Tokyo (Japan). At the start of 2026, SOSV’s 800 active portfolio companies had raised $7.3 billion and were valued at $18.2 billion. Each year SOSV publishes the SOSV Deep Tech 100, the most promising frontier tech companies in the portfolio.
SOSV believes that deep tech demands the best minds around the world. SOSV’s founders represent 82 nationalities operating in 58 countries. 44% hold PhDs and 32% of portfolio companies have at least one female founder.
SOSV has partnered with public agencies to create world-class facilities for founders. SOSV secured $25 million each from New York’s Empire State Development (2020) and the New Jersey Economic Development Authority (2021) to develop SOSV’s locations in New York City and Newark. In 2023, SOSV opened a new office in San Francisco’s Dogpatch neighborhood. Last year, SOSV announced a $49 million project, backed by $24.5 million from NJEDA, to build HAX Plasma Forge, in partnership with the Princeton Plasma Physics Lab (PPPL).
Founding
Managing General Partner Sean O’Sullivan founded SOSV in 1995 after the IPO of MapInfo, the startup he co-founded that pioneered digital street mapping. The firm has grown to nine general partners and 80 staff members. A lifelong believer in using technology to improve human and planetary health, O’Sullivan is actively involved across all SOSV activities.
O’Sullivan has donated tens of millions from his investment proceeds to education and humanitarian causes, including Khan Academy and CoderDojo. As a firm, SOSV also contributes 10% of firm profits (“SOSV carry”) to charity.
Funds and Limited Partners
As of 2026, SOSV has $1.5B in assets under management, anchored by its most recent and largest core fund, the $306M SOSV V. SOSV also operates the Genesis Consortium, a partnership between IndieBio and leading VCs and industry partners that provides an additional $250,000 in funding to startups meeting certain criteria.
SOSV’s limited partners include wealth management platforms, sovereign wealth funds, corporations, and family offices. Investors include, among others, Credit Suisse, the Irish Strategic Investment Fund, Pfizer Ventures, and Honda. In SOSV’s Fund V, 43% of the limited partners are located in North America, 27% in Europe, 23% in Asia & Oceania, and 3% in the Middle East.
SOSV Consortium
The SOSV Consortium consists of entities that originated at SOSV, in some cases have SOSV investment, and remain closely aligned with SOSV. The entities include Genesis Consortium, which is an investment vehicle for VCs and corporates to support early stage life science companies, dlab, which is a fund spun out of SOSV in 2023 focused on early stage investing in blockchain infrastructure, and Orbit Startups, a fund that also became independent of SOSV in 2023 to pursue investments in high growth startups in emerging and frontier markets.
SOSV at a Glance
SOSV’s network of founders, mentors, co-investors, and programs spans the globe, and we’re committed to developing the widest possible startup ecosystem for human and planetary health.
Press Inquiries
The SOSV comms team is alway ready to help journalists seeking expert perspective connect with our general partners and the founders in our portfolio.
Investors
SOSV has hundreds of co-investors in portfolio companies and limited partners in our SOSV funds. Please reach out to learn more about both opportunities.
Startups
Ready to start a company? SOSV starts investing at pre-seed when companies join SOSV’s programs HAX, SOSV SF and SOSV NY. We continue investing post-program in series seed, A and beyond.
Careers
The companies in SOSV’s 1000+ startup portfolio have hundreds of job openings, and most of them are listed on SOSV’s job boards.
SOSV Program Alums
Visit the SOSV employee and founder portal to connect with the Founders’ Forum, update company information, review FAQ.