exhibit_104x063026xhaleu

Offers must acknowledge receipt of this amendment prior to the hour and date specified in the solicitation or as amended, by one of the following methods: (a) By completing items 8 and 15, and returning or (c) By separate letter or electronic communication which includes a reference to the solicitation and amendment numbers. FAILURE OF YOUR ACKNOWLEDGMENT TO BE RECEIVED AT THE PLACE DESIGNATED FOR THE RECEIPT OF OFFERS PRIOR TO THE HOUR AND DATE SPECIFIED MAY RESULT IN REJECTION OF YOUR OFFER. If by virtue of this amendment you desire to change an offer already submitted, such change may be made by letter or electronic communication, provided each letter or electronic communication makes reference to the solicitation and this amendment, and is received prior to the opening hour and date specified. E. IMPORTANT: is not is required copies to the issuing office. AMENDMENT OF SOLICITATION/MODIFICATION OF CONTRACT 1. CONTRACT ID CODE 2. AMENDMENT/MODIFICATION NUMBER 3. EFFECTIVE DATE 4. REQUISITION/PURCHASE REQUISITION NUMBER 5. PROJECT NUMBER (If applicable) 7.ADMINISTERED BY (If other than Item 6) CODE STANDARD FORM 30 (REV. 11/2016) Prescribed by GSA FAR (48 CFR) 53.243 FACILITY CODE 9A. AMENDMENT OF SOLICITATION NUMBER 9B. DATED (SEE ITEM 11) 10A. MODIFICATION OF CONTRACT/ORDER NUMBER 10B. DATED (SEE ITEM 13) 11. THIS ITEM ONLY APPLIES TO AMENDMENTS OF SOLICITATIONS The above numbered solicitation is amended as set forth in Item 14. is extended. is not extended. 12. ACCOUNTING AND APPROPRIATION DATA (If required) copies of the amendment; (b) By acknowledging receipt of this amendment on each copy of the offer submitted; 13. THIS ITEM APPLIES ONLY TO MODIFICATIONS OF CONTRACTS/ORDERS. IT MODIFIES THE CONTRACT/ORDER NUMBER AS DESCRIBED IN ITEM 14. CHECK ONE A. THIS CHANGE ORDER IS ISSUED PURSUANT TO: (Specify authority) THE CHANGES SET FORTH IN ITEM 14 ARE MADE IN THE CONTRACT ORDER NUMBER IN ITEM 10A. B. THE ABOVE NUMBERED CONTRACT/ORDER IS MODIFIED TO REFLECT THE ADMINISTRATIVE CHANGES (such as changes in paying office, appropriation data, etc.) SET FORTH IN ITEM 14, PURSUANT TO THE AUTHORITY OF FAR 43.103(b). C. THIS SUPPLEMENTAL AGREEMENT IS ENTERED INTO PURSUANT TO AUTHORITY OF: D. OTHER (Specify type of modification and authority) Except as provided herein, all terms and conditions of the document referenced in Item 9A or 10A, as heretofore changed, remains unchanged and in full force and effect. 15C. DATE SIGNED 15A. NAME AND TITLE OF SIGNER (Type or print) 16C. DATE SIGNED 16A. NAME AND TITLE OF CONTRACTING OFFICER (Type or print) 14. DESCRIPTION OF AMENDMENT/MODIFICATION (Organized by UCF section headings, including solicitation/contract subject matter where feasible.) PAGE 6. ISSUED BY CODE 8. NAME AND ADDRESS OF CONTRACTOR (Number, street, county, State and ZIP Code) (X) CODE 15B. CONTRACTOR/OFFEROR (Signature of person authorized to sign) 16B. UNITED STATES OF AMERICA (Signature of Contracting Officer) Previous edition unusable PAGESOF Contractor The hour and date specified for receipt of Offers to sign this document and return Andrew J. Ford See continuation page U.S. Department of Energy Idaho Operations Office 1955 Fremont Avenue Idaho Falls ID 83415 89243223CNE000030 U.S. Department of Energy Idaho Operations Office 1955 Fremont Avenue Idaho Falls ID 83415 AMERICAN CENTRIFUGE OPERATING, LLC Attn: Charles Kerner 6901 Rockledge Dr Ste 800 Bethesda MD 208171867 P00027 892432 L8VHV5CNBV97 08300-2025-60-302218-25233-2721270-0000000-0000000-0000000 FAR 52.232-22 Limitation of Funds; 52.217-9 Option to Extend the Term of the Contract; 00701 26NE000289 See Block 16C 11/30/2022 Net Increase: $15,000,000.00 1 4 Docusign Envelope ID: EA2FF5EF-A763-8F5F-82F7-80D194496269 6/30/2026 Austin DeRose 6/30/2026

CONTINUATION SHEET REFERENCE NO. OF DOCUMENT BEING CONTINUED PAGES NAME OF OFFEROR OR CONTRACTOR SUPPLIES/SERVICES (B) UNIT (D) UNIT PRICE (E) AMOUNT (F) OPTIONAL FORM 336 (4-86) Sponsored by GSA FAR (48 CFR) 53.110 ITEM NO. (A) QUANTITY (C) NSN 7540-01-152-8067 89243223CNE000030/P00027 AMERICAN CENTRIFUGE OPERATING, LLC UEI: L8VHV5CNBV97 The purpose of this amendment to the Contract is to: 1. Modify Option Period 1b (CLIN 0008) as follows: a. Option period 1b (CLIN 0008) is being split into 2 separate CLINS by creating a new CLIN (0009). b. Option period 1b (CLIN 008) is modified from a 2-year option period to a 3-month option period with no HALEU production authorized. The scope of work for CLIN 0008 is revised to reflect this and outlines the revised authorized scope of work. c. The contract type is changed from Cost-Reimbursable Fixed-Fee/Incentive Fee to Firm-Fixed-Price. d. Clauses related to Firm-Fixed-Price Contracts have been added. e. Contract language is changed from Target cost and Target Fee to Firm-Fixed-Price. f. The amount of Firm-Fixed-Price for CLIN 0008 is $15,000,000.00 2. Add CLIN 0009, which encompasses the remaining 21 months of HALEU production that were most recently part of CLIN 0008 and will be represented moving forward as Option 1c. a. Target Cost of CLIN 0009 is $149,187,912.69 b. Target Fixed Fee for CLIN 0009 is $13,953,016.70 c. The Total Ceiling Cost of CLIN 0009 is $163,140929.39 3. Exercise the modified CLIN 0008 (Option Period 1b), which is 3-months Cascade Maintenance and Store SNM, with no HALEU production. 4. Provide Incremental Funding under CLIN 0008 in the amount of $15,000,000.00, changing the total CLIN 0008 obligations from $0.00 to $15,000,000.00. 5. Total obligations on the contract are changed from $317,041,412.48 to $332,041,412.48. 6. Total Target Cost is changed from $1,057,184,813.00 to $1,043,467,723.70 Continued... PAGE 2 OF 4 Docusign Envelope ID: EA2FF5EF-A763-8F5F-82F7-80D194496269

CONTINUATION SHEET REFERENCE NO. OF DOCUMENT BEING CONTINUED PAGES NAME OF OFFEROR OR CONTRACTOR SUPPLIES/SERVICES (B) UNIT (D) UNIT PRICE (E) AMOUNT (F) OPTIONAL FORM 336 (4-86) Sponsored by GSA FAR (48 CFR) 53.110 ITEM NO. (A) QUANTITY (C) NSN 7540-01-152-8067 89243223CNE000030/P00027 AMERICAN CENTRIFUGE OPERATING, LLC 7. Total Target Fee is changed from $82,930,627.00 to $81,647,716.30 8. Total ceiling cost of the contract is unchanged. Note: Under this Modification, Option Period 1b is split into two separate CLINS by creating a new CLIN (0009). CLIN 0008 is now a 3-month option period with no production target and will still be represented moving forward as Option 1b. CLIN 008 also changes from Cost-Reimbursable to Firm-Fixed-Priced. CLIN 0009 encompasses the remaining 21 months of HALEU production that were originally part of CLIN 0008 and will be represented moving forward as Option Period 1c. Payments under CLIN 0008 will be $5,000,000 per month upon receipt, review, and approval of documentation of services rendered. All other terms, conditions, dates, and amounts remain unchanged. Payment: VIPERS https://vipers.doe.gov Any questions, please contact by call/email 888-251-3557 or payments@hq.doe.gov Fund: 08300 Appr Year: 2025 Allottee: 60 Report Entity: 302218 Object Class: 25233 Program: 2721270 Project: 0000000 WFO: 0000000 Local Use: 0000000 Period of Performance: 12/01/2022 to 09/30/2026 Change Item 00008 to read as follows(amount shown is the total amount): 00008 15,000,000.00Maintain the Cascade and Store SNM, 3-Month Option Period 1b (Phase 3) Embedded Lease: No Continued... PAGE 3 OF 4 Docusign Envelope ID: EA2FF5EF-A763-8F5F-82F7-80D194496269