Centrus signs multi-year Antares HALEU contract
Centrus Energy’s new multi-year HALEU contract with Antares adds backlog and includes prepayments to support its expanding U.S. enrichment capacity.
Rhea-AI Filing Summary
Centrus Energy Corp. (LEU) reported that it has signed a definitive multi-year contract to supply Antares Nuclear with high-assay low-enriched uranium (HALEU), with deliveries scheduled to begin before the end of the decade. The HALEU will be U.S.-origin and "unobligated," supporting Antares’ advanced reactor projects for space and national security missions. The agreement adds another HALEU customer to Centrus’ backlog and includes prepayments from Antares to help fund Centrus’ expansion of domestic enrichment capacity at its American Centrifuge Plant in Piketon, Ohio, described as the only licensed HALEU production facility in the western world.
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8-K Event Classification
2 items: 8.01, 9.01
2 items
Item 8.01
Other Events
Other
Voluntary disclosure of events the company deems important to shareholders but not covered by other items.
Item 9.01
Financial Statements and Exhibits
Exhibits
Financial statements, pro forma financial information, or exhibit attachments filed with this report.
Key Figures
Contract start timing: Deliveries before the end of the decade
Antares funding: Over $600 million
Antares founding year: 2023
+4 more
7 metrics
Contract start timing
Deliveries before the end of the decade
Planned start of HALEU deliveries under the multi-year Centrus–Antares contract
Antares funding
Over $600 million
Funding backing Antares as described in the announcement
Antares founding year
2023
Year Antares was founded
Centrus utility service history
More than 1,850 reactor years of fuel
Fuel provided to utility customers since 1998
Coal equivalence of fuel supplied
More than 7 billion tons of coal
Centrus’ historical fuel deliveries expressed as coal equivalent
Target year for Antares electricity production
2027
Antares aims to produce electricity from an advanced reactor in 2027
Initial military deployments
2028
Antares expects initial production deployments to U.S. military installations in 2028
Key Terms
High-Assay Low-Enriched Uranium, HALEU, unobligated, advanced reactor, +2 more
6 terms
High-Assay Low-Enriched Uranium technical
"Centrus to supply Antares with High-Assay Low-Enriched Uranium (HALEU)"
High-assay low-enriched uranium (HALEU) is uranium processed to contain a higher percentage of the atom that sustains a nuclear chain reaction (U‑235) than standard reactor fuel but well below weapons-grade, typically about 5–20% U‑235. It matters to investors because HALEU is the preferred fuel for many advanced reactors and some medical isotope production, so its availability, production capacity, regulation and geopolitical risks can materially affect project timelines, supplier contracts and valuation of companies in the nuclear supply chain.
HALEU technical
"another HALEU customer to Centrus' backlog and includes prepayments"
HALEU (high-assay low-enriched uranium) is uranium fuel enriched to a higher level than traditional reactor fuel but below weapons-grade, roughly like a higher-octane gasoline for nuclear reactors. It matters to investors because this fuel enables newer, smaller and more efficient reactors to run longer or produce more power from less material, so availability, regulation and production costs can affect utilities, reactor developers and mining companies’ prospects.
unobligated regulatory
"Production will be "unobligated" that can support national security missions"
Unobligated describes money, resources, or contractual capacity that has not yet been legally committed or promised to a specific purpose. For investors, it signals how much cash or budget remains available to be spent, contracted, or reserved later — like seeing how much of a household checking account is still free to use because no bills have been signed or scheduled against it yet.
advanced reactor technical
"support Antares advanced reactor projects, including for space and national security"
A class of next-generation nuclear power designs that use new materials, fuels, coolants, or lower-pressure systems compared with traditional light-water reactors, often aiming for greater safety, efficiency, or flexibility. Think of them like “next-generation engines” for producing electricity with a variety of technical approaches rather than a single design. They matter to investors because they carry different cost, licensing, construction and market risks and opportunities that can affect project timelines, capital needs and potential returns.
microreactors technical
"Antares is developing compact microreactors for critical missions"
A microreactor is a very small, factory-built nuclear power unit that produces a few megawatts of electricity or heat, roughly like a compact, modular power plant you could place at a single site. Investors watch them because they promise lower upfront construction risk, faster deployment, and flexible siting compared with large plants, which can change project costs, regulatory hurdles, revenue predictability, and long‑term energy market exposure.
forward-looking statements regulatory
"This news release contains "forward-looking statements" within the meaning of Section 21E"
Forward-looking statements are predictions or plans that companies share about what they expect to happen in the future, like estimating sales or profits. They matter because they help investors understand a company's outlook, but since they are based on guesses and assumptions, they can sometimes be wrong.
FAQ
AI-generated questions and answers. How Rhea-AI works. Not financial advice.
What did Centrus Energy (LEU) announce in the September 17, 2026 8-K?
Centrus Energy announced a definitive multi-year contract with Antares Nuclear to supply high-assay low-enriched uranium (HALEU), with deliveries commencing before the end of the decade and supporting Antares’ advanced reactor projects for space and national security missions.
How does the Antares HALEU contract affect Centrus Energy’s (LEU) operations?
The contract adds another HALEU customer to Centrus’ backlog and includes prepayments from Antares to support Centrus’ expansion of domestic HALEU enrichment capacity at its American Centrifuge Plant in Piketon, Ohio.
What is special about the HALEU Centrus will supply under the Antares contract?
Centrus states the HALEU will be U.S.-origin and "unobligated", enabling use in a variety of U.S. national security missions, including Antares’ defense and space reactor projects.
When are Centrus’ HALEU deliveries to Antares expected to begin?
The companies state that HALEU deliveries under the multi-year contract are scheduled to commence before the end of the decade, aligning fuel supply with Antares’ planned advanced reactor deployments.
What role does Centrus Energy’s Piketon, Ohio facility play in this contract?
Centrus highlights its American Centrifuge Plant in Piketon, Ohio as the only licensed HALEU production facility in the western world, and the contract’s prepayments are intended to support the facility’s multi-billion-dollar expansion for HALEU and low-enriched uranium production.
Who is Antares, Centrus Energy’s HALEU customer in this agreement?
Antares is described as a nuclear fission energy company developing compact microreactors for defense and space applications, founded in 2023, backed by over $600 million in funding, and aiming for advanced reactor electricity production in 2027 with deployments beginning in 2028.
AI-generated analysis. How Rhea-AI works. Not financial advice.
UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549
FORM 8-K
CURRENT REPORT
Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934
_________________
Date of Report (Date of earliest event reported): September 17, 2026
(Exact name of registrant as specified in its charter)
| (State or other jurisdiction of incorporation) | (Commission File Number) | (I.R.S. Employer Identification No.) | ||||||
(Address of Principal Executive Offices)
Registrant's telephone number, including area code: (301 ) 564-3200
Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:
| Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425) | |||||
| Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12) | |||||
| Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b)) | |||||
| Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c)) | |||||
Securities registered pursuant to Section 12(b) of the Act:
| Title of Each Class | Trading Symbol | Name of Each Exchange on Which Registered | ||||||
Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter).
Emerging Growth Company ☐
If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐
Item 8.01 Other Events
On September 17, 2026, Centrus Energy Corp. (the “Company”) issued a press release announcing that it had signed a contract with Antares Nuclear to supply high-assay low-enriched uranium (“HALEU”). Deliveries of HALEU under the contract are scheduled to begin prior to the end of the current decade.
A copy of the press release is attached hereto as Exhibit 99.1 and is incorporated herein by reference.
Item 9.01 Financial Statements and Exhibits
(d) Exhibits.
| Exhibit No. | Description | ||||
| 99.1 | Press Release dated September 17, 2026 | ||||
| 104 | Cover Page Interactive Data File (embedded within the Inline XBRL Document) | ||||
SIGNATURE
Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned thereunto duly authorized.
| Centrus Energy Corp. | |||||||||||
| Date: | September 17, 2026 | By: | /s/ Todd M. Tinelli | ||||||||
| Todd M. Tinelli | |||||||||||
| Senior Vice President, Chief Financial Officer, and Treasurer | |||||||||||
Centrus and Antares Sign Multi-Year HALEU Supply Contract September 17, 2026 Production will be "unobligated" that can support national security missions Adds another HALEU customer to Centrus' backlog and includes prepayments to advance domestic enrichment capacity buildout BETHESDA, Md. and TORRANCE, Calif., Sept. 17, 2026 /PRNewswire/ -- Centrus Energy (NYSE: LEU) and Antares Nuclear today announced the signing of a definitive multi-year contract for Centrus to supply Antares with High-Assay Low-Enriched Uranium (HALEU), with deliveries commencing before the end of the decade. It ensures a reliable, domestic source of HALEU to support Antares advanced reactor projects, including for space and national security missions. The new contract includes prepayments from Antares to support the expanded HALEU capacity. "This contract is another sign that demand for HALEU is real and it is accelerating, and Centrus is in prime position to meet this need," said Amir Vexler, President and CEO of Centrus. "Binding orders from Antares and others are supporting our expansion to commercial-scale production – an expansion that is now well underway. We look forward to supporting Antares' continued growth and success." "Fuel supply is one of the practical questions every advanced reactor developer has to answer," said Jordan Bramble, CEO and Co-Founder of Antares. "This contract gives Antares a reliable, U.S.-origin source of HALEU for the reactors we're deploying for a wide variety of defense and space customers." Antares is developing compact microreactors for critical missions on Earth and in space. The company was recently selected for the U.S. Army's Janus Program at Fort Bragg, North Carolina; the Air Force's Advanced Nuclear Power for Installations program at Joint Base San Antonio, Texas; and a Space Force Strategic Breakthrough award to demonstrate a space reactor. Centrus is pioneering U.S. HALEU production at its American Centrifuge Plant in Piketon, Ohio, the only licensed HALEU production facility in the western world. Last year, Centrus launched a multi-billion-dollar expansion including large-scale production of HALEU as well as Low-Enriched Uranium (LEU). The agreement reflects the unique role that both companies can play in meeting U.S. national security requirements. Because Centrus's enrichment technology and manufacturing supply chain are U.S.-origin, the arrangement can provide Antares with fuel that could be used for a variety of national security applications. Centrus' AC100 centrifuge design is the only deployment-ready enrichment technology capable of "unobligated" enrichment, meaning that it can be used for U.S. national security missions. About Centrus Centrus Energy is a trusted American supplier of nuclear fuel and services for the nuclear power industry, helping meet the growing need for clean, affordable, carbon-free energy. Since 1998, the Company has provided its utility customers with more than
1,850 reactor years of fuel, which is equivalent to more than 7 billion tons of coal. With world-class technical and engineering capabilities, Centrus is pioneering production of High-Assay, Low-Enriched Uranium and is leading the effort to restore America's uranium enrichment capabilities at scale so that we can meet our clean energy, energy security, and national security needs. Find out more at www.centrusenergy.com or follow us on LinkedIn and X. About Antares Antares is a nuclear fission energy company developing compact microreactors for defense and space applications, delivering safe, reliable power where traditional energy sources cannot. Founded in 2023 and backed by over $600 million in funding, Antares achieved initial criticality of its Mark-0 microreactor in 2026 under the DOE Reactor Pilot Program, and is on track to produce electricity from an advanced reactor in 2027, with initial production deployments to U.S. military installations beginning in 2028. Antares operates facilities in Torrance, California; Idaho Falls, Idaho; and Aiken, South Carolina. Forward Looking Statements This news release contains "forward-looking statements" within the meaning of Section 21E of the Securities Exchange Act of 1934, as amended, and the Private Securities Litigation Reform Act of 1995. In this context, forward-looking statements mean statements related to future events, which may impact our expected future business and financial performance, and often contain words such as "expects", "anticipates", "intends", "plans", "believes", "will", "should", "could", "would" or "may" and other words of similar meaning. These forward-looking statements are based on information available to us as of the date of this news release and represent management's current views and assumptions with respect to future events and operational, economic and financial performance. For Centrus Energy Corp., particular factors that involve uncertainty and could cause our actual future results to differ materially from those expressed in our forward-looking statements and which are, and may be, exacerbated by any worsening of the global business and economic environment include but are not limited to the following: the war in Ukraine and other geopolitical conflicts; our government contracts, including related to changes to the U.S. government's appropriated funding levels for HALEU and the government's inability to satisfy its obligations, and our lease to our facility in Piketon, Ohio; whether or when government demand for HALEU or LEU for government or commercial uses will materialize and at what level; the impact and potential extended duration of a supply/demand imbalance in the market for LEU; significant competition from major LEU producers, including foreign competitors, who may be less cost sensitive than we are; limitations on our ability to compete in foreign markets; pricing trends and demand in the uranium and enrichment markets, especially in light of the potential of limited supply and our dependence on others for deliveries of LEU; and our ability to successfully implement our planned expansion projects in Piketon, Ohio and Oak Ridge, Tennessee. Readers are cautioned not to place undue reliance on these forward-looking statements, which apply only as of the date of this news release. These factors may not constitute all factors that could cause actual results to differ from those discussed in any forward-looking statement. Accordingly, forward-looking statements should not be relied upon as a predictor of actual results. Readers are urged to carefully review and consider the various disclosures made in this news release and in our filings with the SEC, including our Annual Report on Form 10-K for the year ended December 31, 2025, under Part II, Item 1A – "Risk Factors" in our Quarterly report on Form 10-Q for the quarter ended March 31, 2026, under Part II, Item 1A – "Risk Factors" in our Quarterly report on Form 10-Q for the quarter ended June 30, 2026, and our filings with the SEC that attempt to advise interested parties of the risks and factors that may affect our business. We do not undertake to update our forward-looking statements to reflect events or circumstances that may arise after the date of this news release, except as required by law. Contacts: Centrus (Media) — Dan Leistikow LeistikowD@centrusenergy.com Centrus (Investors) — Neal Nagarajan NagarajanNK@centrusenergy.com Antares -- Kayla Haas kayla.haas@antaresindustries.com View original content to download multimedia:https://www.prnewswire.com/news-releases/centrus-and-antares-sign-multi- year-haleu-supply-contract-302881954.html SOURCE Centrus Energy Corp.