November delivered another surge in family office activity, with private wealth concentrating capital in AI, energy innovation, and frontier technology. FINTRX data surfaced multiple billion-dollar rounds where family offices invested alongside leading institutional players. Below, we break down the five largest family office–backed direct deals of November 2025.
Anysphere, the AI research lab behind the rapidly scaling developer platform Cursor, has secured a landmark $2.3 billion funding round, pushing its valuation to $29.3B. Led by Accel and Coatue, the deal included participation from a16z Perennial (Andreessen Horowitz Family Office). The raise positions Anysphere as one of the fastest-growing AI research companies worldwide as it accelerates its vision to redefine the future of programming through advanced AI tooling.
• Deal Size: $2.3B
• Company: Anysphere
• Investors: a16z Perennial; Coatue; Thrive Capital; DST Global
• Sector: Technology/Artificial Intelligence
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.
• Deal Size: $1.5B
• Company: Lambda
• Investors: TWG Global; Tulco, LLC; US Innovative Technology Fund
• Sector: AI/Machine Learning Infrastructure
View TWG Global in FINTRX
| View Tulco, LLC in FINTRX
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.
• Deal Size: $900M
• Company: Luma AI
• Investors: a16z Perennial; HUMAIN; AMD Ventures; Matrix Partners; Amplify Partners
• Sector: Artificial Intelligence/Generative Models
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.
• Deal Size: $700M
• Company: X-energy
• Investors: Emerson Collective; Jane Street; ARK Invest; Point72; Reaves Asset Management; Hood River, XTX Ventures; Ares Management; NGP; Segra Capital
• Sector: Climate Tech/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.
• Deal Size: $600M
• Company: Physical Intelligence
• Investors: Bezos Expeditions; Lux Capital; Thrive Capital; CapitalG
• Sector: Artificial Intelligence/Robotics
FINTRX tracks over 35,000 verified family office direct investments across 4,300+ global firms, layering AI-driven insights, decision-maker visibility, and warm-introduction mapping into one intelligent platform. Whether you’re targeting growth-stage AI startups or identifying cross-sector co-investment partners, FINTRX gives you a real-time view into how the world’s most influential family offices deploy capital.
Disclaimer: This content is for informational purposes only and should not be interpreted as investment advice or a recommendation to invest in any company, security, or strategy mentioned.