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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.
AI infrastructure dominated the largest venture rounds this week, with two multibillion-dollar deals in the sector taking the top spots. Data center and cloud provider Crusoe led with a massive $3 billion financing, followed by Fluidstack’s $1.5 billion raise. Further down the list, AI inference startup Gimlet Labs landed $300 million, joining a diverse group of big fundings spanning cybersecurity, robotics, food, HR software, payments and healthcare.
1. Crusoe, $3B, AI infrastructure: Denver-based Crusoe raised a $3 billion Series F co-led by Atreides Management and Valor Equity Partners, with Mubadala Capital also participating. Originally founded to use stranded natural gas to power cryptocurrency mining, Crusoe has transformed into a major AI cloud and data center provider serving customers including OpenAI, Microsoft and Meta. The company has raised nearly $7.2 billion to date, and the latest financing values it at $30 billion — triple its valuation less than a year ago — according to Crunchbase.
2. Fluidstack, $1.5B, AI infrastructure: New York-based Fluidstack raised $1.5 billion in a private equity round led by Jane Street Capital, bringing the AI infrastructure company’s total funding to just over $2.6 billion. Fluidstack provides large-scale GPU and data center infrastructure for demanding AI workloads and has emerged as one of a growing group of companies spending heavily to meet soaring compute demand for AI. The financing values the company at $18 billion.
3. (tied) Gimlet Labs, $300M, AI infrastructure: San Francisco-based Gimlet Labs raised a $300 million Series B led by Andreessen Horowitz, with investors including Sapphire Ventures, Menlo Ventures, Arm Holdings and M12 – Microsoft’s Venture Fund. Gimlet is building an AI inference cloud that distributes workloads across different types of chips, an approach aimed at making the increasingly compute-intensive process of running AI models faster and more efficient. The company has raised $392 million to date and was valued at $3 billion in the latest round, per Crunchbase.
3. (tied) Upwind Security, $300M, cybersecurity: San Francisco-based Upwind Security raised $300 million in new funding co-led by Bessemer Venture Partners and TCV. Other investors included Salesforce Ventures 1, Greylock, Craft Ventures and Cyberstarts. The company’s platform uses real-time cloud runtime data to identify threats and vulnerabilities, putting it at the intersection of two particularly well-funded areas: cloud security and AI. Upwind has raised $730 million to date and was valued at $3.8 billion in this latest deal.
5. David, $250M, food and nutrition: New York-based high-protein food company David raised a $250 million Series B co-led by Greenoaks and Valor Equity Partners. Iconiq Capital, Imaginary Ventures and company co-founder Peter Rahal also participated. Best known for its high-protein, low-calorie bars, David has expanded into other protein-focused foods as consumers continue gravitating toward products marketed around protein and metabolic health. The company has raised $335 million and was valued at $2.25 billion in the latest round.
6. HiBob, $166M, HR software: New York-based HiBob raised $166 million in a round led by Salesforce, with Farallon Capital Management also participating. HiBob’s Bob platform combines HR, payroll, benefits and employee-management tools, and the company is increasingly positioning its workforce data as a foundation for enterprise AI applications. The latest deal brings its total funding to $740 million and values the company at $3.2 billion.
7. Lyte AI, $165M, robotics and physical AI: Sunnyvale, California-based Lyte AI raised a $165 million Series C led by Maverick Silicon, with participation from Fidelity Management And Research Company, Atreides Management, Key 1 Capital and Ora Global. Founded by former Apple engineers, Lyte develops custom silicon, sensors and AI software that help robots perceive and understand their surroundings, the kind of technology that underpins the fast-growing physical AI sector. Lyte has now raised $272 million to date, per Crunchbase, and was valued at $1.6 billion in the Series C.
8. TabaPay, $155M, fintech and payments: Mountain View, California-based TabaPay secured $155 million in growth financing led by FTV Capital. The company provides money-movement infrastructure that helps banks and fintech companies instantly disburse, collect and transfer funds. The company announced the latest funding as it also pursues an acquisition of federally chartered Transact Bank, a move that could deepen its role in payments infrastructure. TabaPay’s new round follows a Series A of an undisclosed amount back in 2022.
9. Thyme Care, $125M, health care and oncology: Nashville, Tennessee-based Thyme Care raised a $125 million Series E led by Morgan Health, the healthcare investment arm of JPMorgan Chase. Other backers included CVS Health Ventures, Humana and Andreessen Horowitz, among others. Thyme Care works with health plans, employers and providers to coordinate cancer treatment and manage oncology care, part of a broader shift toward value-based specialty care. The company has now raised $399 million in total and was valued at $2 billion in the latest round.
10. HiddenLayer, $100M, AI cybersecurity: Austin-based HiddenLayer raised a $100 million Series B led by Delta-v Capital. Ten Eleven Ventures, M12, Booz Allen Ventures and Morgan Stanley also participated. HiddenLayer builds security tools designed specifically to protect AI models, agents and workflows from attacks and vulnerabilities, a category gaining urgency as enterprises move AI systems into production. The company has raised $156.2 million to date, per Crunchbase.
Methodology
We tracked the largest announced rounds in the Crunchbase database that were raised by U.S.-based companies for the period of Aug. 29-Sept. 4, 2026. Although most announced rounds are in the database, there may be a small time lag, as some rounds are reported late in the week.
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Illustration: Dom Guzman
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