Antares, founded in 2023 and headquartered in Torrance, California, is a nuclear energy company focused on the design and manufacture of modular, transportable fission microreactors. The company's primary product is the R1 reactor, a system capable of delivering between 100 kilowatts and 1 megawatt of electric power for operational periods of four to six years. The reactor utilizes TRISO coated particle fuel, sodium heat pipes, and a nitrogen Brayton cycle for power conversion.
The company has secured over $130 million in funding to support its development. Antares operates from a 145,000 square-foot vertically integrated facility. Its technical domains include nuclear engineering, advanced reactor design, and power conversion systems.
Antares targets strategic energy applications across several demanding sectors. These include defense operations, remote military installations, space exploration missions, and undersea applications. The company has planned its first reactor demonstration at Idaho National Laboratory in 2026, with full-power operation scheduled for 2027.
