Antares Nuclear Raises $470 Million to Build Reactors for US Military Bases

TLDR

• Antares Nuclear raised $470 million in Series C funding, split between $370 million equity and $100 million debt
• The round was co-led by Paradigm and Caffeinated Capital, with Point72 Ventures and others participating
• Antares achieved a self-sustaining fission reaction in June 2024, the first privately developed non-light-water reactor to do so in the US in over 40 years
• The company plans to deploy its first reactors to US Air Force installations by 2028
• Its Mark-1 reactor, which will generate electricity, is expected to be ready in 2027

California-based nuclear startup Antares Nuclear has raised $470 million to build small reactors for US military bases. The funding round was co-led by venture capital firms Paradigm and Caffeinated Capital.

California startup Antares Nuclear raised $470 million to advance plans to build tiny reactors aimed at supplying power to US military bases https://t.co/w5nw7IE3Im

- Bloomberg (@business) July 27, 2026

The raise includes $370 million in equity and $100 million in debt. Other investors in the round include Point72 Ventures, Shine Capital, and Industrious Ventures.

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