TechCrunch Startup News Microreactor startup Antares raises $96M for land, sea, and space-based nuclear power; plus Kalshi raises $1B at $11B valuation
Dec 3, 2025
The latest discussions revolve around Antares, a startup advancing microreactors aimed at commercial, defense, and space applications, having just raised $96 million. Their innovative R1 reactor design utilizes TrisoFuel for efficient energy output. There's a buzz in the nuclear sector as investor interest surges, with several large projects gaining traction. Meanwhile, Calcene raised a whopping $1 billion, reaching an $11 billion valuation, showcasing the expanding world of prediction markets that blend sports and politics.
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Microreactor Push With TrisoFuel
- Antares raised $96M to develop R1 microreactors targeting commercial, defense, and space applications.
- The R1 uses TrisoFuel spheres and aims for demonstration with the DOE next year and full power by 2027.
Renewed Nuclear Momentum
- Multiple startups and big tech are reinvesting in nuclear, boosting both small and large reactor projects.
- Recent rounds and DOE support signal faster timelines and renewed industry momentum.
DOE Pilot Program Inclusion
- Antares was named one of 11 participants in the Department of Energy's reactor pilot program in August.
- The program aims to have at least three participants begin operation by July 4th of next year.