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Antares raises $470M to build nuclear reactors for the US military

Antares Nuclear has secured $470 million to develop small modular reactors (SMRs) for the U.S. military, driven by increasing demand for advanced nuclear power. With plans to deploy the first reactor by 2028, the company addresses electricity needs amid rising energy demands. Despite investor enthusiasm, advanced nuclear startups face commercialization challenges due to an immature supply chain and potential costs that may exceed those of traditional power plants.

Key points

  • Antares raised $470 million in Series C funding for small modular reactors.
  • The funding was led by Paradigm and Caffeinated Capital, indicating high investor interest in nuclear startups.
  • Antares develops SMRs, which can generate 100 kilowatts to 1 megawatt of electricity.
  • The company’s demonstration reactor, Mark-0, achieved criticality on June 4.
  • Antares is one of three finalists in the Pentagon's Advanced Nuclear Power program.
  • The first reactor deployment is planned for 2028 at U.S. military installations.
  • Advanced nuclear startups face hurdles including an immature supply chain and production scaling.
  • Lazard estimates new SMRs will cost about $214 per megawatt-hour, possibly making them less competitive.

Why it matters

  • The trend towards electrification and data center demand is pushing investment in advanced nuclear technologies.
  • Recent funding successes in the nuclear sector, such as X-energy's $1 billion IPO, highlight growing interest.
  • The rise of small modular reactors (SMRs) aligns with 2025 IT trends emphasizing sustainable and reliable energy sources.

Antares Nuclear's substantial funding marks a significant advancement in the pursuit of advanced nuclear solutions for military applications, though commercialization hurdles remain a challenge for the industry.