Form 8-K

8-K — CENTRUS ENERGY CORP

Accession: 0001628280-26-062535

Filed: 2026-09-17

Period: 2026-09-17

CIK: 0001065059

SIC: 1400 (MINING, QUARRYING OF NONMETALLIC MINERALS (NO FUELS))

Item: Other Events

Item: Financial Statements and Exhibits

Documents

8-K — leu-20260917.htm (Primary)

EX-99.1 (ex991_centrusandantaress.htm)

GRAPHIC (ex991_centrusandantaress001.jpg)

GRAPHIC (ex991_centrusandantaress002.jpg)

XML — IDEA: XBRL DOCUMENT (R1.htm)

8-K

8-K (Primary)

Filename: leu-20260917.htm · Sequence: 1

leu-20260917

0001065059False00010650592026-09-172026-09-17

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

Centrus Energy Corp.

(Exact name of registrant as specified in its charter)

Delaware 1-14287 52-2107911

(State or other jurisdiction of incorporation) (Commission File Number) (I.R.S. Employer Identification No.)

6901 Rockledge Drive, Suite 800

Bethesda, MD 20817

(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

Class A Common Stock, par value $0.10 per share LEU NYSE

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

EX-99.1

Filename: ex991_centrusandantaress.htm · Sequence: 2

ex991_centrusandantaress

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.

GRAPHIC

Filename: ex991_centrusandantaress001.jpg · Sequence: 7

Binary file (218112 bytes)

Download ex991_centrusandantaress001.jpg

GRAPHIC

Filename: ex991_centrusandantaress002.jpg · Sequence: 8

Binary file (291078 bytes)

Download ex991_centrusandantaress002.jpg

XML — IDEA: XBRL DOCUMENT

XML

Filename: R1.htm · Sequence: 10

v3.26.3

Cover

Sep. 17, 2026

Document Information [Line Items]

Entity Central Index Key

0001065059

Amendment Flag

false

Entity Registrant Name

Centrus Energy Corp.

Document Period End Date

Sep. 17, 2026

Document Type

8-K

Entity Address, Address Line One

6901 Rockledge Drive

Entity Address, Address Line Two

Suite 800

Entity Address, City or Town

Bethesda

Entity Address, State or Province

Entity Address, Postal Zip Code

20817

City Area Code

301

Local Phone Number

564-3200

Entity Emerging Growth Company

false

Entity File Number

1-14287

Entity Incorporation, State or Country Code

Entity Tax Identification Number

52-2107911

Written Communications

false

Soliciting Material

false

Pre-commencement Tender Offer

false

Pre-commencement Issuer Tender Offer

false

Title of 12(b) Security

Class A Common Stock, par value $0.10 per share

Trading Symbol

LEU

Security Exchange Name

NYSE

- Definition

Boolean flag that is true when the XBRL content amends previously-filed or accepted submission.

+ References

No definition available.

+ Details

Name:

dei_AmendmentFlag

Namespace Prefix:

dei_

Data Type:

xbrli:booleanItemType

Balance Type:

Period Type:

duration

- Definition

Area code of city

+ References

No definition available.

+ Details

Name:

dei_CityAreaCode

Namespace Prefix:

dei_

Data Type:

xbrli:normalizedStringItemType

Balance Type:

Period Type:

duration

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

Name:

dei_DocumentInformationLineItems

Namespace Prefix:

dei_

Data Type:

xbrli:stringItemType

Balance Type:

Period Type:

duration

- Definition

For the EDGAR submission types of Form 8-K: the date of the report, the date of the earliest event reported; for the EDGAR submission types of Form N-1A: the filing date; for all other submission types: the end of the reporting or transition period. The format of the date is YYYY-MM-DD.

+ References

No definition available.

+ Details

Name:

dei_DocumentPeriodEndDate

Namespace Prefix:

dei_

Data Type:

xbrli:dateItemType

Balance Type:

Period Type:

duration

- Definition

The type of document being provided (such as 10-K, 10-Q, 485BPOS, etc). The document type is limited to the same value as the supporting SEC submission type, or the word 'Other'.

+ References

No definition available.

+ Details

Name:

dei_DocumentType

Namespace Prefix:

dei_

Data Type:

dei:submissionTypeItemType

Balance Type:

Period Type:

duration

- Definition

Address Line 1 such as Attn, Building Name, Street Name

+ References

No definition available.

+ Details

Name:

dei_EntityAddressAddressLine1

Namespace Prefix:

dei_

Data Type:

xbrli:normalizedStringItemType

Balance Type:

Period Type:

duration

- Definition

Address Line 2 such as Street or Suite number

+ References

No definition available.

+ Details

Name:

dei_EntityAddressAddressLine2

Namespace Prefix:

dei_

Data Type:

xbrli:normalizedStringItemType

Balance Type:

Period Type:

duration

- Definition

Name of the City or Town

+ References

No definition available.

+ Details

Name:

dei_EntityAddressCityOrTown

Namespace Prefix:

dei_

Data Type:

xbrli:normalizedStringItemType

Balance Type:

Period Type:

duration

- Definition

Code for the postal or zip code

+ References

No definition available.

+ Details

Name:

dei_EntityAddressPostalZipCode

Namespace Prefix:

dei_

Data Type:

xbrli:normalizedStringItemType

Balance Type:

Period Type:

duration

- Definition

Name of the state or province.

+ References

No definition available.

+ Details

Name:

dei_EntityAddressStateOrProvince

Namespace Prefix:

dei_

Data Type:

dei:stateOrProvinceItemType

Balance Type:

Period Type:

duration

- Definition

A unique 10-digit SEC-issued value to identify entities that have filed disclosures with the SEC. It is commonly abbreviated as CIK.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Exchange Act

-Number 240

-Section 12

-Subsection b-2

+ Details

Name:

dei_EntityCentralIndexKey

Namespace Prefix:

dei_

Data Type:

dei:centralIndexKeyItemType

Balance Type:

Period Type:

duration

- Definition

Indicate if registrant meets the emerging growth company criteria.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Exchange Act

-Number 240

-Section 12

-Subsection b-2

+ Details

Name:

dei_EntityEmergingGrowthCompany

Namespace Prefix:

dei_

Data Type:

xbrli:booleanItemType

Balance Type:

Period Type:

duration

- Definition

Commission file number. The field allows up to 17 characters. The prefix may contain 1-3 digits, the sequence number may contain 1-8 digits, the optional suffix may contain 1-4 characters, and the fields are separated with a hyphen.

+ References

No definition available.

+ Details

Name:

dei_EntityFileNumber

Namespace Prefix:

dei_

Data Type:

dei:fileNumberItemType

Balance Type:

Period Type:

duration

- Definition

Two-character EDGAR code representing the state or country of incorporation.

+ References

No definition available.

+ Details

Name:

dei_EntityIncorporationStateCountryCode

Namespace Prefix:

dei_

Data Type:

dei:edgarStateCountryItemType

Balance Type:

Period Type:

duration

- Definition

The exact name of the entity filing the report as specified in its charter, which is required by forms filed with the SEC.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Exchange Act

-Number 240

-Section 12

-Subsection b-2

+ Details

Name:

dei_EntityRegistrantName

Namespace Prefix:

dei_

Data Type:

xbrli:normalizedStringItemType

Balance Type:

Period Type:

duration

- Definition

The Tax Identification Number (TIN), also known as an Employer Identification Number (EIN), is a unique 9-digit value assigned by the IRS.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Exchange Act

-Number 240

-Section 12

-Subsection b-2

+ Details

Name:

dei_EntityTaxIdentificationNumber

Namespace Prefix:

dei_

Data Type:

dei:employerIdItemType

Balance Type:

Period Type:

duration

- Definition

Local phone number for entity.

+ References

No definition available.

+ Details

Name:

dei_LocalPhoneNumber

Namespace Prefix:

dei_

Data Type:

xbrli:normalizedStringItemType

Balance Type:

Period Type:

duration

- Definition

Boolean flag that is true when the Form 8-K filing is intended to satisfy the filing obligation of the registrant as pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Exchange Act

-Number 240

-Section 13e

-Subsection 4c

+ Details

Name:

dei_PreCommencementIssuerTenderOffer

Namespace Prefix:

dei_

Data Type:

xbrli:booleanItemType

Balance Type:

Period Type:

duration

- Definition

Boolean flag that is true when the Form 8-K filing is intended to satisfy the filing obligation of the registrant as pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Exchange Act

-Number 240

-Section 14d

-Subsection 2b

+ Details

Name:

dei_PreCommencementTenderOffer

Namespace Prefix:

dei_

Data Type:

xbrli:booleanItemType

Balance Type:

Period Type:

duration

- Definition

Title of a 12(b) registered security.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Exchange Act

-Number 240

-Section 12

-Subsection b

+ Details

Name:

dei_Security12bTitle

Namespace Prefix:

dei_

Data Type:

dei:securityTitleItemType

Balance Type:

Period Type:

duration

- Definition

Name of the Exchange on which a security is registered.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Exchange Act

-Number 240

-Section 12

-Subsection d1-1

+ Details

Name:

dei_SecurityExchangeName

Namespace Prefix:

dei_

Data Type:

dei:edgarExchangeCodeItemType

Balance Type:

Period Type:

duration

- Definition

Boolean flag that is true when the Form 8-K filing is intended to satisfy the filing obligation of the registrant as soliciting material pursuant to Rule 14a-12 under the Exchange Act.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Exchange Act

-Number 240

-Section 14a

-Subsection 12

+ Details

Name:

dei_SolicitingMaterial

Namespace Prefix:

dei_

Data Type:

xbrli:booleanItemType

Balance Type:

Period Type:

duration

- Definition

Trading symbol of an instrument as listed on an exchange.

+ References

No definition available.

+ Details

Name:

dei_TradingSymbol

Namespace Prefix:

dei_

Data Type:

dei:tradingSymbolItemType

Balance Type:

Period Type:

duration

- Definition

Boolean flag that is true when the Form 8-K filing is intended to satisfy the filing obligation of the registrant as written communications pursuant to Rule 425 under the Securities Act.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Securities Act

-Number 230

-Section 425

+ Details

Name:

dei_WrittenCommunications

Namespace Prefix:

dei_

Data Type:

xbrli:booleanItemType

Balance Type:

Period Type:

duration