Antares Nuclear
A nuclear-energy company developing factory-produced fission microreactors for critical missions.
Antares NuclearThe Company
Antares is developing fission microreactors designed for critical and remote missions, including potential U.S. military use. Its strategy is based on producing reactors in factories rather than treating every project as a bespoke construction programme.
The company announced a $470 million Series C in July 2026, comprising $370 million of equity and $100 million of debt, without disclosing a valuation. It later announced a strategic-breakthrough award for a space-reactor demonstration and a long-term TRISO fuel-supply agreement.
Why It Matters
Antares is one of the clearest private bets on compact nuclear power for defence and other mission-critical use cases. The investment case depends on moving from engineering and demonstrations to a licensable, fuelled and repeatably manufactured product.
Valuation History
- Raised $470M · valuation undisclosed→Jul 2026Series C ($370M equity + $100M debt)Source ↗
What Changed
Announced $470M Series C to deploy nuclear microreactors for critical missions.
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