Antares
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Location
Headquarters: Redondo Beach, California, United States, North America
Region: California
Country: US
Continent: North America
About
Antares Nuclear, Inc. designs and manufactures modular, transportable microreactors and power systems for strategic energy applications on Earth and in space. Their R1 Microreactor targets defense-critical assets with integrated shielding, heat exchangers, and a nitrogen Brayton cycle, enabling autonomous, high-reliability energy delivery in challenging environments. The company emphasizes a vertically integrated supply chain, advanced thermal management, control systems, and offline testing to support rapid deployment of nuclear power solutions for terrestrial, space, and underwater missions. Based in the United States, they highlight a 145,000 sq-ft facility in Torrance, California, and partnerships with national labs and government programs for demonstration and safety validation.
Antares Nuclear designs and manufactures modular, transportable microreactors for defense and space applications. Their R1 Microreactor provides autonomous, high-reliability nuclear power for strategic assets on Earth and in orbit. The company focuses on rapid deployment of clean energy solutions for military and government clients.
Antares Nuclear, Inc.
2023
for_profit
active
Industries
Primary Industry: Business Services
Categories
Funding & Financials
Series A
30000000
private
Investors
Founders
Jordan Bramble
Julia DeWahl
Leadership
Technology Stack
Products
R1 Microreactor: A kilowatt-scale nuclear microreactor providing 100-500 kWe power output for 4-6 years, designed for strategic energy applications on Earth, in space, and underwater.
Heat Pipes & Thermal Management: Design and development of high-temperature heat pipes and radiators for compact thermal management in nuclear reactors and related systems.
Control Systems: Design, build, and testing of automated control systems with hardware-in-the-loop digital twin capabilities for reactor operation and monitoring.
Graphite Machining: Precision machining of nuclear-grade graphite components used in reactor cores and control systems.
Funding rounds
Series B · $71M · (2025-12-02) · Lead: Shine Capital
Debt Financing · $25M · (2025-12-02)
Series A · $30M · (2024-10-30) · Lead: Alt Capital,Caffeinated Capital