SOSV operates leading hardware (HAX) and biotech (IndieBio) accelerators with permanent labs in the U.S., Europe, and Asia. It specializes in pre-seed to Series A investments in life sciences, climate, foodtech, and health technology, funding over 800 startups globally.
Portfolio Focus
Asset class
Early-Stage Venture Capital (Seed, Series A)
Impact theme
Technology
Deep Tech
Investment geographies
Global
Key people
Sean O'Sullivan
Managing Partner
Fund V
Raised: $306 million
Asset class:Early-Stage Venture Capital (Seed, Series A)
SOSV Fund V closed at $306M in April 2024 and aims to be the first check into deep tech startups. The fund supports ventures in climate, health, and advanced hardware through its accelerator programs, with a top 100 climate tech portfolio at $12B combined valuation.
SOSV Fund IV nearly doubled the size of its predecessor to reinforce SOSV’s position as one of the world’s most active deep tech and climate/health investors. The fund backs about 150 new startups per year, providing $100–250K initial investments through its accelerator programs and up to $2 million in follow-ons to top-performing portfolio companies. SOSV Fund IV is sector-agnostic within the bounds of deep tech and science-driven innovation, backing pioneers in hardware, biotech, climate resilience, blockchain, and cross-border SaaS. The portfolio includes leading tech startups like NotCo, Opentrons, Formlabs, and MycoWorks, with a strategic mission to catalyze scientific entrepreneurship for scalable social and environmental impact.
SOSV Fund III raised $200M to back startups via the firm’s accelerator network, supporting 700 startups worldwide. The fund focuses on filling the early-stage funding gap and transferring best practices internationally.
The Russell Family Foundation
