NYX Ventures
Empowering AGI startups from pre-seed to pre-IPO
O3 Partners
Pan-European PE/VC group investing in tech companies from incubation through growth; €550M deployed, 60+ portfolio companies, CEE and DACH focus.
Oak Grove Ventures
Singapore-based VC investing in early-stage Web3, AI, and biotechnology startups, evolved from a multi-continent family office.
Oak HC/FT
Venture and growth equity firm backing healthcare and fintech companies from seed through growth stage, with $5.3B AUM.
Obvious Ventures
Venture capital for startups reimagining trillion-dollar industries through a world positive lens
Oceans Ventures
New York-based operator-led pre-seed and seed VC, backing tech founders with 25 years of Apple, Facebook, and Google operating experience across hiring, GTM, and fundraising.
Octopus Ventures
European venture capital firm backing founders solving tomorrow's challenges
Offline Ventures
Early-stage fund & studio backing founders who build differently & serve humanity
Offscript
Generalist seed fund backing founders with unconventional life narratives, betting that being "written off" is often a sign of exceptional character.
OG Venture Partners
Multi-stage VC backed by a single LP, Eyal Ofer's Ofer Global, giving founders patient capital and a multi-generational business network.
Ohio Innovation Fund
Early-stage VC based in Dublin, Ohio investing $500K–$4M in disruptive founders across AI/ML, cybersecurity, medtech, AR/VR, SaaS, and biotech with a team track record of 7 unicorns.
Okapi Venture Capital
Named for the "dense jungle"-adapted animal, this seed and early-stage fund has backed information technology and life science startups since 2005.
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Get the Complete Investor Database →Okta Ventures
Corporate venture arm of Okta investing in identity, security, and privacy startups across all stages to extend the Okta ecosystem.
Old Line Capital Partners
Bowie, Maryland pre-seed/seed VC providing hands-on mentoring and small-business expertise to founders across Maryland and the Mid-Atlantic.
Olive Technology Ventures
Multi-family-office-backed venture platform with ~$1B AUM, led by ex-WestSummit/Vertex Ventures partner Elise Huang; exits include Unity, UiPath.
Olive Tree Capital
Boston-based family office-rooted VC investing in technology, life sciences, fintech, and frontier startups globally across early and growth stages.
Omega Funds
Investing in the future of medicine through life sciences
OMERS Ventures
Backed by Canada's OMERS pension fund, invests in early-stage fintech, vertical software, and AI infrastructure founders.
OMX Ventures
Lincolnshire-based early-stage VC investing at the convergence of biology, big data, and AI, backing therapeutics, bio-tools, diagnostics, and synthetic biology companies across North America and Europe.
Oncology Ventures
Backing founders and companies building the future of cancer care
Ondine Capital
Southeast Asia-focused VC backing consumer tech startups in retail, education, logistics, and broader TMT sectors.
One Peak
Growth equity firm with $4B+ AUM investing $15M–$150M in European software scale-ups with $5M+ ARR, backing category-defining SaaS companies from growth through IPO or exit.
One Planet Capital
Venture capital for climate change
OneSixOne Ventures
Pre-seed VC for enterprise software and govtech startups
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