Weekly funding roundup highlights billion-dollar rounds

Three startups raised $1 billion or more this week, with Hadrian, Base Power and Valar Atomics all securing nine-figure rounds. Hadrian, a developer of automated factories, raised $1.37 billion in Series D funding at a $7.87 billion valuation. Base Power, which makes residential battery storage systems, raised $1 billion at a $13 billion post-money valuation, and nuclear energy developer Valar Atomics raised $1 billion in Series B funding.

Other notable rounds included Lumilens, which raised over $700 million for AI connectivity; live shopping marketplace Whatnot, which raised $545 million; and Mariana Minerals, which raised $310 million for critical minerals. AI infrastructure company Volta raised $300 million, cybersecurity provider Horizon3 raised $250 million, biotech firm LifeMine Therapeutics raised $188 million, and agentic AI company HappyRobot raised $150 million.