The Week’s 10 Biggest Funding Rounds: A Big Week For Big Checks

NVIDIA Corp. — want to keep track of the largest startup funding deals in 2026 with our curated list of $100 million-plus venture deals to U.S.-based companies? Check out The Crunchbase Megadeals Board.

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 — Hadrian, Base Power and Valar Atomics — 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. Hadrian, $1.37B, manufacturing: Hadrian, a developer of highly automated factories, raised $1.37 billion in Series D funding led by WCM Investment Management, Washington Harbour Partners, Valor Equity Partners, 137 Ventures, JP Morgan Chase and Baillie Gifford. The financing sets a $7.87 billion valuation for the 6-year-old, Torrance, California-based company. 2. (tied) Base Power, $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. Ribbit Capital, Addition, Valor Equity Partners and JP Morgan Chase led the financing, which coincided with the launch of the company’s Base Core home battery. 2. (tied) Valar Atomics, $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 Sequoia Capital. The El Segundo, California-based company also secured a $200 million credit facility led by Erebor and JP Morgan. 4.