5 Largest Family Office Direct Deals of November 2025

Lambda, a leading AI and machine learning infrastructure provider, announced a major $1.5 billion Series E round to scale its supercomputing and AI hardware capabilities. Family office investors TWG Global (Mark Walter Family Office) and Tulco, LLC (Thomas Tull Family Office) participated alongside the U.S. Innovative Technology Fund. The capital will advance Lambda’s mission to bring superintelligence-level computing resources into mainstream commercial and consumer environments.

Luma AI, developer of generative AI models including its flagship Dream Machine, has raised $900 million in Series C financing. Led by HUMAIN with participation from AMD Ventures, Matrix Partners, Amplify Partners, and a16z Perennial, the round will accelerate Luma's development of multimodal AI systems capable of understanding, generating, and interacting with the physical world.

X-energy, a pioneer in advanced nuclear reactor engineering, raised $700 million in new financing to scale deployment of its next-generation reactor designs across the U.S. The round, led by Jane Street, continues the long-standing support of Emerson Collective (Jobs Family Office), which has backed the firm across multiple stages. The capital will accelerate commercial rollout of X-energy’s advanced nuclear systems and strengthen U.S. leadership in clean energy innovation.

Physical Intelligence, a cutting-edge AI robotics company working to develop general-purpose AI capable of operating in the real world, has raised a $600 million round, bringing its valuation to $5.6 billion. Bezos Expeditions, the family office of Jeff Bezos, expanded its commitment after backing the company’s 2024 funding round. The capital will accelerate the integration of advanced AI systems into physical robotics applications.