The Week’s 10 Biggest Funding Rounds: AI Megadeals Dominate Again
This week’s largest fundraising recipient was frontier AI lab Recursive Intelligence, and agentic AI, AI-compute, and AI-native startups filled up much of the rest of the Top 10 list. Other areas that attracted sizable funding include biotech, nuclear power, and security.
1. Ricursive Intelligence, $300M, AI: Ricursive Intelligence, a frontier AI lab, announced that it has raised $300 million in a Series A round of funding at a $4 billion valuation. Lightspeed Venture Partners led the latest round, which comes just two months after the Palo Alto, California-based company’s launch.
2. Cellares, $257M, biotech: Cellares, a startup focused on the automated, large-scale manufacturing of cell therapies, said it secured $257 million in a Series D financing led by BlackRock and Eclipse. Founded in 2019, South San Francisco, California-based Cellares has raised $612 million to date.
3 (tied). Upwind Security, $250M, cloud security: Cloud security unicorn Upwind Security closed on $250 million in Series B funding led by Bessemer Venture Partners. The round brings total investment for the San Francisco-headquartered company to over $430 million.
3 (tied). Decagon, $250M, AI agents: San Francisco-based Decagon, a developer of AI tools for customer service, raised for $250 million in new funding. Coatue and Index Ventures led the round, which tripled Decagon’s valuation to $4.5 billion in under six months.
5. PaleBlueDot AI, $150M, AI compute: PaleBlueDot AI, an AI compute platform founded in 2024, announced that it completed a $150 million Series B financing, valuing the company at over $1 billion. B Capital led the financing for the Palo Alto, California-based company.
6. Standard Nuclear, $140M, nuclear power: Oak Ridge, Tennessee-based Standard Nuclear, a provider of advanced nuclear fuel, raised $140 million in a Series A round led by Decisive Point and joined by a long list of new and existing investors. The company said it will use the financing to expand annual production to more than two metric tons by mid-2026.
7. Northwood Space, $100M, space tech: Northwood Space, a startup focused on improving ground infrastructure for space missions, landed $100 million in Series B funding. Washington Harbour Partners and Andreessen Horowitz led the financing for the Southern California-based company, which was founded in 2023.
8 (tied). Rogo, $75M, agentic AI: Rogo, developer of an agentic AI system for financial workflows, raised $75 million in a Series C financing led by Sequoia Capital. The New York-based startup is also opening its first international office in London, with plans to expand into Europe.
8 (tied). Mesh, $75M, crypto payments: San Francisco-based crypto payments network Mesh picked up $75 million in Series C funding led by Dragonfly Capital. Its platform enables consumers to make payments with a range of cryptocurrencies, with merchants receiving instant settlement in their preferred stablecoin.
10 (tied). Gyde, $60M, health insurance: Austin-based Gyde, an AI-native insurance brokerage platform, launched with $60 million in initial funding led by Lightspeed Venture Partners.
10 (tied). Breakthru Medicine, $60M, biotech: Breakthru Medicine, a startup focused on therapies for cancer patients, emerged from stealth with $60 million in Series A financing.