Antares designs and manufactures modular, transportable fission microreactors for deployment in remote and strategically significant locations. Founded in 2023, the company has developed the R1 reactor, which produces between 100 kWe and 1 MWe and is designed for operational lifetimes of 4–6 years. The R1 incorporates TRISO coated particle fuel, sodium heat pipe thermal management, and nitrogen Brayton cycle power conversion.
The company operates Antares Prime, a 145,000 square-foot vertically integrated manufacturing facility in Torrance, California. Antares has secured over $130 million in funding from top-tier investors including Shine Capital. The company has established partnerships with Idaho National Laboratory and Savannah River National Laboratory, with plans to demonstrate the R1 at Idaho National Laboratory in 2026 and achieve full-power operation in 2027.
Target deployment environments include remote military installations, undersea applications, and deep space missions. The reactor's modular design and transportability position it for use in locations where conventional power infrastructure is impractical or impossible.
