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This is a weekly feature that runs down the week’s top 10 announced funding rounds in the U.S. Check out last week’s biggest funding deal roundup here.
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. 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.
4. 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.
Illustration: Dom Guzman
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