C4 Ventures is a boutique European fund run by ex-Apple and ex-Microsoft executives that focuses on "Physical AI" (robotics, autonomous systems) and frontier hardware, positioning itself as helping Europe compete with Silicon Valley and China in foundational AI infrastructure rather than just applications. The fund has achieved a 54 startups to 12 unicorns conversion rate with over 20 exits including two NYSE IPOs, which press call "rare" or "top-decile" among European VCs, while maintaining a deliberately small capital base from high-net-worth individuals rather than large institutions.