Antares Nuclear Stock
| Valuation | $2.06B1 |
| Valuation Date | Jul 27, 2026 |
| Implied Valuation | n/a |
| Last Price | n/a |
| 52-Week High | n/a |
| 52-Week Low | n/a |
| YTD Return | n/a |
| 1-Year Return | n/a |
| 3-Year Return | n/a |
| Total Funding | $604M2 |
| Latest Round Amount | $470M3, 4 |
| Latest Round | Series C |
| Funding Rounds | 4 |
| IPO Status | Unknown |
| Expected IPO Date | n/a |
| Revenue | n/a |
| Revenue Type | n/a |
| P/S Ratio | n/a |
About Antares Nuclear
Antares Nuclear is a nuclear fission company that designs and manufactures factory-produced, transportable microreactors for defense and space missions. Its R1 reactor is a sodium heat-pipe design that uses TRISO fuel in a graphite core and is built to deliver between 100 kilowatts and 1 megawatt of electricity for six or more years without refueling. Antares makes money by selling compact microreactors under defense contracts. That includes U.S. Army and Air Force programs to put on-site power on military bases. In June 2026 its Mark-0 test reactor reached criticality at Idaho National Laboratory, the first privately developed non-light-water reactor to do so in the United States in more than 40 years. The company plans to produce electricity with a Mark-1 unit in 2027 and begin deployments to U.S. military installations in 2028.
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News
Antares Nuclear Announces Multi-Year TRISO Fuel Supply Agreement with Standard Nuclear
TORRANCE, Calif.--(BUSINESS WIRE)--Antares Nuclear, Inc., a nuclear fission energy company developing compact microreactors for critical missions, today announced the execution of a binding multi-year...
Standard Nuclear Announces Fuel Supply Agreement with Antares Nuclear, Inc.
OAK RIDGE, Tenn.--(BUSINESS WIRE)---- $STDN--Standard Nuclear (NYSE: STDN) ("Standard Nuclear" or the "Company"), a reactor-agnostic producer of TRISO nuclear fuel and the only U.S. company with indus...
Antares Awarded Army Janus Program Agreement to Deliver Nuclear Microreactor Power
The U.S. Army and Defense Innovation Unit selected Antares to own, construct, and operate nuclear microreactors at Fort Bragg, North Carolina, under the Janus Program.
Antares Awarded Army Janus Agreement at Fort Bragg
The U.S. Army and Defense Innovation Unit selected Antares to own, construct and operate nuclear microreactors at Fort Bragg under the Janus program. CEO Jordan Bramble said combined Army, Air Force a...
Dr. Rian Bahran Joins Antares as Chief Nuclear Officer
Former DOE Deputy Assistant Secretary for Nuclear Reactors Rian Bahran joined Antares as chief nuclear officer after the Mark-0 criticality and Series C. He will lead nuclear operations, licensing, go...
Antares Raises $470M Series C to Deploy Nuclear Microreactors for Critical Missions
Antares raised $470M in Series C funding ($370M equity, $100M debt) to scale microreactor production for U.S. military deployments beginning in 2028.
Antares raises $470M to build nuclear reactors for the US military
Antares closed a $470 million Series C, including $370 million in equity and $100 million in debt, co-led by Paradigm and Caffeinated Capital. The company said the capital funds a path from its demons...
Energy Department's small nuclear reactor hits crucial milestone
Antares' Mark-0 microreactor reached criticality at Idaho National Laboratory, the first privately developed non-light-water reactor to do so in the U.S. in over four decades.
Department of Energy Celebrates First Advanced Reactor Criticality
DOE said Antares Nuclear's Mark-0 completed a zero-power fueled criticality demonstration at Idaho National Laboratory on June 4, 2026. It was the first advanced reactor to reach that milestone under ...
Antares Signs Long-Term HALEU Supply Agreement with Urenco
Antares signed a long-term enrichment-services agreement with Urenco for high-assay low-enriched uranium to fuel its microreactors. Urenco said it was the world's first multi-year HALEU supply contrac...
Antares Selected for Proposed Deployment of Nuclear Microreactor at Joint Base San Antonio Under Department of the Air Force ANPI Initiative
The Air Force and Defense Innovation Unit selected Antares for a proposed R1 microreactor deployment at Joint Base San Antonio. Antares said it expects to site, license, construct and operate the syst...
Antares Receives DOE Documented Safety Analysis Approval for Mark-0 Demonstration Reactor
DOE approved the documented safety analysis for Antares' Mark-0 demonstration reactor, a required step toward fueled operation at Idaho National Laboratory. The approval followed the January PDSA clea...
Antares Receives DOE Approval for Mark-0 Reactor Preliminary Documented Safety Analysis (PDSA)
DOE approved Antares' Preliminary Documented Safety Analysis for the Mark-0 reactor ahead of its Idaho National Laboratory demonstration. The company said the PDSA covers the safety basis for the reac...
Microreactor startup Antares raises $96M for land, sea, and space-based nuclear power
Antares raised $96 million in Series B funding, including $71 million in equity led by Shine Capital and $25 million in debt. The company said the capital would fund factory expansion, equipment and u...
DOE Allocates HALEU Fuel to Antares Microreactor Project
The Department of Energy allocated high-assay low-enriched uranium to Antares to support its advanced microreactor as the company moved toward criticality. Antares said the allocation was a step towar...
Antares selected for DOE's Nuclear Reactor Pilot Program
DOE selected Antares for its Nuclear Reactor Pilot Program, a fast-track effort to bring privately developed advanced test reactors to criticality. The program set a goal of at least three advanced-re...