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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.

Startups raised funding rounds with a lot of zeroes at the end this week. Three companies — , and — secured financings of $1 billion or more. Additionally, a robust lineup of companies in sectors including AI, e-commerce, cybersecurity, biotech and even mining also announced sizable new rounds.

1. , $1.37B, manufacturing: Hadrian, a developer of highly automated factories, raised $1.37 billion in Series D funding led by , , , , and . The financing sets a $7.87 billion valuation for the 6-year-old, Torrance, California-based company.

2. (tied) , $1B, energy storage: Austin-based Base Power, a developer of residential battery energy storage systems, secured $1 billion in Series D financing at a $13 billion post-money valuation. , , and led the financing, which coincided with the launch of the company’s Base Core home battery.

2. (tied) , $1B, nuclear power: Valar Atomics, a developer of technology and infrastructure to deliver nuclear energy, closed on $1 billion in Series B funding led by . The El Segundo, California-based company also secured a $200 million credit facility led by and .

4. , $700M, AI connectivity: Lumilens, developer of a connectivity platform for AI infrastructure, emerged from stealth and announced more than $700 million in new funding. , , , and led the financing for the San Jose, California-based startup.

5. , $545M, live shopping: Live shopping marketplace Whatnot bagged $545 million in Series G funding. The round reportedly a $20 billion valuation for the Los Angeles-based company, with , and as lead investors.

6. , $310M, critical minerals: Mariana Minerals, a software-focused developer of projects for supplying critical minerals, picked up $310 million in Series B financing led by . The 4-year-old company engineers, builds and operates mines and refineries using its software platform.

7. , $300M, AI infrastructure: Volta, a developer of AI cloud infrastructure, from stealth and said it raised a Series A at a $2.4 billion valuation, led by , , and .

8. , $250M, cybersecurity: San Francisco-based cybersecurity provider Horizon3, announced a $250 million Series E. and led the round, which set a valuation of more than $2 billion, triple the value set for its Series D last year.

9. , $188M, biotech: Watertown, Massachusetts-based drug discovery startup LifeMine Therapeutics secured $188 million in Series E funding led by . The funding will go toward clinical development of its lead program and advance its pipeline of transplantation and immunology therapies.

10. , $150M, agentic AI: HappyRobot, developer of an agentic AI platform geared for enterprises in sectors including logistics, financial services, utilities and manufacturing, raised $150 million in Series C funding led by and .

Methodology

We tracked the largest announced rounds in the SA¹ú¼Ê´«Ã½ database that were raised by U.S.-based companies for the period of Aug. 1-7. Although most announced rounds are represented in the database, there could be a small time lag as some rounds are reported late in the week.

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