Antares at a glance
As of- [1] Equity raised: Sum of the 1 sourced equity round in the funding history below (debt, tender offers and rumored rounds excluded), July 27, 2026
- [2] Lead investors: TechCrunch, July 27, 2026
What Antares does
Antares is a nuclear fission company developing compact microreactors for defense and space applications.[1] It was founded in 2023.[1] It operates facilities in Torrance, California; Idaho Falls, Idaho; and Aiken, South Carolina.[1] Its reactor design produces between 100 kilowatts and 1 megawatt of electricity.[2] The reactor uses TRISO fuel, which encapsulates uranium in carbon and ceramic shells.[2] Its Mark-0 demonstration reactor reached criticality on June 4, 2026, at Idaho National Laboratory.[2],[1] The company says it was the first privately developed non-light-water reactor to reach criticality in the U.S. in more than four decades.[1] Point72 Ventures, Shine Capital and Industrious Ventures also participated.[1] Antares is one of three finalists in the Pentagon's Advanced Nuclear Power for Installations program, which will test reactors on Air Force bases in Colorado and Montana.[2]
Business model and customers
The money funds the Mark-1 electricity-producing reactor planned for 2027 and first deployments to defense customers in 2028.[1]
Leadership
- Jordan Bramble is CEO and co-founder.[1]
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Recent changes
- Jul 27, 2026Jul 27, 2026Raised $370M Series C TechCrunch
- Jul 27, 2026Jul 27, 2026New investor: Paradigm TechCrunch
- Jul 27, 2026Jul 27, 2026New investor: Industrious Ventures TechCrunch
- Jul 27, 2026Jul 27, 2026New investor: Shine Capital TechCrunch
- Jul 27, 2026Jul 27, 2026New investor: Point72 Ventures TechCrunch
Earlier changes (4)
- Jul 27, 2026Jul 27, 2026New investor: Caffeinated Capital TechCrunch
- Jul 27, 2026Jul 27, 2026Antares Nuclear Raises $470M For Military Microreactors Pulse story
- Jul 27, 2026Jul 27, 2026Antares Raises $470M For Military Nuclear Microreactors Pulse story
- Jul 27, 2026Jul 27, 2026Antares Raises $470M for Military Microreactors Pulse story
Funding history
1 equity event · newest first · sources dated per row| Date | Round | Amount | Valuation | Lead investors | Source |
|---|---|---|---|---|---|
| Jul 27, 2026 | Series C | $370M | — | TechCrunchPulse story |
Equity only. “Equity raised” above sums the rounds with a dated, linked source; rumored rounds, tender offers and secondary sales are listed but not counted, and debt financing is listed separately.
How Antares has been funded
In December 2025, Antares raised a $96 million Series B led by Shine Capital, made up of $71 million in equity and $25 million in debt.[3] On July 27, 2026, Antares announced a $470 million Series C co-led by Paradigm and Caffeinated Capital.[1] The Series C consisted of $370 million in equity and $100 million in debt.[1] Antares says it is backed by more than $600 million in total funding.[1]
Investors
Latest Pulse
- Jul 27, 2026Antares Raises $470M For Military Nuclear MicroreactorsAntares raised a $470 million Series C -- $370 million equity plus $100 million debt -- co-led by Paradigm and Caffeinated Capital, after achieving initial criticality on its Mark-0 compact nuclear reactor under a DOE pilot program.→
- Jul 27, 2026Antares Raises $470M for Military MicroreactorsNuclear startup Antares raised a $470 million Series C to build small modular reactors for US military bases, part of a Pentagon program racing to bring domestic reactors online by 2028 under a Trump executive order.→
- Jul 27, 2026Antares Nuclear Raises $470M For Military MicroreactorsAntares Nuclear raised a $470 million Series C led by Paradigm and Caffeinated Capital to deploy small nuclear microreactors that can power US military bases independent of the civilian grid by 2028.→
Coverage Timeline
newest firstAll Coverage
FUNDING$470M Series C
Antares Raises $470M For Military Nuclear Microreactors
Antares raised a $470 million Series C -- $370 million equity plus $100 million debt -- co-led by Paradigm and Caffeinated Capital, after achieving initial criticality on its Mark-0 compact nuclear reactor under a DOE pilot program.
Antares Raises $470M for Military Microreactors
FUNDING$470M Series C
Antares Raises $470M for Military Microreactors
Nuclear startup Antares raised a $470 million Series C to build small modular reactors for US military bases, part of a Pentagon program racing to bring domestic reactors online by 2028 under a Trump executive order.
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Antares FAQ
How much has Antares raised?
In December 2025, Antares raised a $96 million Series B led by Shine Capital, made up of $71 million in equity and $25 million in debt.[3]
Who invested in Antares?
On July 27, 2026, Antares announced a $470 million Series C co-led by Paradigm and Caffeinated Capital.[1]
Who founded Antares?
Jordan Bramble is CEO and co-founder.[1]
What does Antares do?
Antares is a nuclear fission company developing compact microreactors for defense and space applications.[1]
References
researched 2026-10-24Sources & methodologyshow
Where these figures come from
- TechCrunchmajor outlet1 fact
Figures are labelled Reported (a source states it), Estimated, Derived (computed from other facts) or Rumored (in talks / unconfirmed). Rumors never replace a confirmed figure. Each figure keeps its own as-of date; history is preserved rather than overwritten.