Antares raises $470M to build nuclear reactors for the US military
News Source
β’Mon, 27 Jul 2026 17:49:28 +0000
π° What Happened
A startup called Antares Nuclear has raised $470 million to build small nuclear reactors for US military bases. The funding round was led by Paradigm and Caffeinated Capital. Antares is developing a small modular reactor (SMR) that can power up to 750 homes. The company's test reactor, Mark-0, became active on June 4 at the Idaho National Laboratory. Antares is one of three finalists in a Pentagon program to test small reactors on Air Force bases in Colorado and Montana. The company aims to bring its first reactor online next year.
π The Backstory
Interest in nuclear power is growing fast in the US. AI data centers need huge amounts of electricity, and nuclear power plants can provide clean, steady energy. Many tech companies are looking for new power sources to run their AI systems. X-energy raised $1 billion through an IPO in April. Antares uses a fuel called TRISO, which is seen as safer than traditional nuclear fuel. The tiny fuel spheres are coated in carbon and ceramic so they cannot melt down. This makes them safer for use on military bases and in populated areas.
π― Why It Matters
Small nuclear reactors could provide clean, reliable power for homes and businesses. If they work for the military, they could eventually power civilian communities too.
A startup called Antares Nuclear has raised $470 million to build small nuclear reactors for US military bases. The funding round was led by Paradigm and Caffeinated Capital. Antares is developing a small modular reactor (SMR) that can power up to 750 homes. The company's test reactor, Mark-0, became active on June 4 at the Idaho National Laboratory. Antares is one of three finalists in a Pentagon program to test small reactors on Air Force bases in Colorado and Montana. The company aims to bring its first reactor online next year.
Interest in nuclear power is growing fast in the US. AI data centers need huge amounts of electricity, and nuclear power plants can provide clean, steady energy. Many tech companies are looking for new power sources to run their AI systems. X-energy raised $1 billion through an IPO in April. Antares uses a fuel called TRISO, which is seen as safer than traditional nuclear fuel. The tiny fuel spheres are coated in carbon and ceramic so they cannot melt down. This makes them safer for use on military bases and in populated areas.
Small nuclear reactors could provide clean, reliable power for homes and businesses. If they work for the military, they could eventually power civilian communities too.