exhibit_102xhaleumod28

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: Austin DeRose 6901 ROCKLEDGE DR STE 800 BETHESDA MD 208171867 P00028 892432 L8VHV5CNBV97 See Schedule FAR 52.232-22 Limitation of Funds; 52.217-9 Option to Extend the Term of the Contract; 00701 26NE000401 See Block 16C 11/30/2022 1 9 Docusign Envelope ID: F3A4071C-A0E0-8E0B-8022-91B21ED6D3C6 Austin DeRose 9/30/2026 9/30/2026

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/P00028 AMERICAN CENTRIFUGE OPERATING, LLC UEI: L8VHV5CNBV97 The purpose of this amendment to the Contract is to: 1. Extend the Period of Performance end date of CLIN 0008(Option Period 1b) from September 30, 2026, to October 15,2026 to allow time for continued negotiations of a bridge lease agreement and sale of HALEU material to ACO. 2. Authorize costs accrual on a per day basis of $161,290.32, not to exceed $2,419,354.83 while the lease and sales agreement are negotiated. Once the lease and sales agreement are signed, ACO will be allowed 3 business days of cost accrual to give them enough time to implement necessary changes to align the site to a new accounting structure. 3. Authorize the following CLIN 0006 change orders: a. Stockton Street Sinkhole Repairs - $16,521.00(no fee) b. Vacuum Pump Spares - $120,922.00(no fee) 4. Move unused funds from CLIN 0002 to CLIN 0008 in the amount of $2,419,354.83. 5. Move unused funds from CLIN 0002 in the amount of $170,892.82 to cover the authorized CLIN 0006 change orders and a cost over-run of $33,449.82. 6. Total ceiling cost of CLIN 0002 is changed from $170,055,394.61 to $167,465,146.96 7. Total ceiling cost of CLIN 0006 is changed from $4,772,113.00 to $4,943,005.82 8. Total ceiling cost of CLIN 0008 is changed from $15,000,000 to $17,419,354.83 9. The total ceiling amount of the contract is unchanged. 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 Period of Performance: 12/01/2022 to 10/15/2026 Continued... PAGE 2 OF 9 Docusign Envelope ID: F3A4071C-A0E0-8E0B-8022-91B21ED6D3C6

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/P00028 AMERICAN CENTRIFUGE OPERATING, LLC Change Item 00002 to read as follows(amount shown is the total amount): 00002 167,465,146.96Ongoing Cascade Operation and Production of 900 kg minimum of HALEU, Year 1 (Phase 2) Line item value is: $167,465,146.96 Incrementally Funded Amount: $167,465,146.96 Accounting Info: 07900-2023-60-302218-25233-2721136-0000000-00000 00 -0000000 Fund: 07900 Appr Year: 2023 Allottee: 60 Report Entity: 302218 Object Class: 25233 Program: 2721136 Project: 0000000 WFO: 0000000 Local Use: 0000000 Funded: $0.00 Accounting Info: 07900-2023-60-302218-25233-2721136-0000000-00000 00 -0000000 Fund: 07900 Appr Year: 2023 Allottee: 60 Report Entity: 302218 Object Class: 25233 Program: 2721136 Project: 0000000 WFO: 0000000 Local Use: 0000000 Funded: $0.00 Accounting Info: 07900-2023-60-302218-25233-2721136-0000000-00000 00 -0000000 Fund: 07900 Appr Year: 2023 Allottee: 60 Report Entity: 302218 Object Class: 25233 Program: 2721136 Project: 0000000 WFO: 0000000 Local Use: 0000000 Funded: $0.00 Accounting Info: 07900-2023-60-302218-25233-2721136-0000000-00000 00 -0000000 Fund: 07900 Appr Year: 2023 Allottee: 60 Report Entity: 302218 Object Class: 25233 Program: 2721136 Project: 0000000 WFO: 0000000 Local Use: 0000000 Funded: $0.00 Accounting Info: 05350-2024-60-302218-25233-2721136-0000000-00000 Continued... PAGE 3 OF 9 Docusign Envelope ID: F3A4071C-A0E0-8E0B-8022-91B21ED6D3C6

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/P00028 AMERICAN CENTRIFUGE OPERATING, LLC 00 -0000000 Fund: 05350 Appr Year: 2024 Allottee: 60 Report Entity: 302218 Object Class: 25233 Program: 2721136 Project: 0000000 WFO: 0000000 Local Use: 0000000 Funded: $0.00 Accounting Info: 05350-2024-60-302218-25233-2721136-0000000-00000 00 -0000000 Fund: 05350 Appr Year: 2024 Allottee: 60 Report Entity: 302218 Object Class: 25233 Program: 2721136 Project: 0000000 WFO: 0000000 Local Use: 0000000 Funded: $0.00 Accounting Info: 07900-2024-60-302218-25233-2721136-0000000-00000 00 -0000000 Fund: 07900 Appr Year: 2024 Allottee: 60 Report Entity: 302218 Object Class: 25233 Program: 2721136 Project: 0000000 WFO: 0000000 Local Use: 0000000 Funded: $0.00 Accounting Info: 05350-2024-60-302218-25233-2721136-0000000-00000 00 -0000000 Fund: 05350 Appr Year: 2024 Allottee: 60 Report Entity: 302218 Object Class: 25233 Program: 2721136 Project: 0000000 WFO: 0000000 Local Use: 0000000 Funded: $0.00 Accounting Info: 05350-2024-60-302218-25233-2721136-0000000-00000 00 -0000000 Fund: 05350 Appr Year: 2024 Allottee: 60 Report Entity: 302218 Object Class: 25233 Program: 2721136 Project: 0000000 WFO: 0000000 Local Use: 0000000 Funded: $0.00 Accounting Info: 07900-2023-60-302218-25233-2721136-0000000-00000 00 -0000000 Fund: 07900 Appr Year: 2023 Allottee: 60 Continued... PAGE 4 OF 9 Docusign Envelope ID: F3A4071C-A0E0-8E0B-8022-91B21ED6D3C6

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/P00028 AMERICAN CENTRIFUGE OPERATING, LLC Report Entity: 302218 Object Class: 25233 Program: 2721136 Project: 0000000 WFO: 0000000 Local Use: 0000000 Funded: $0.00 Accounting Info: 05350-2025-60-302218-25233-2721136-0000000-00000 00 -0000000 Fund: 05350 Appr Year: 2025 Allottee: 60 Report Entity: 302218 Object Class: 25233 Program: 2721136 Project: 0000000 WFO: 0000000 Local Use: 0000000 Funded: $0.00 Accounting Info: 05350-2025-60-302218-25233-2721136-0000000-00000 00 -0000000 Fund: 05350 Appr Year: 2025 Allottee: 60 Report Entity: 302218 Object Class: 25233 Program: 2721136 Project: 0000000 WFO: 0000000 Local Use: 0000000 Funded: $0.00 Accounting Info: 05350-2025-60-302218-25233-2721136-0000000-00000 00 -0000000 Fund: 05350 Appr Year: 2025 Allottee: 60 Report Entity: 302218 Object Class: 25233 Program: 2721136 Project: 0000000 WFO: 0000000 Local Use: 0000000 Funded: $0.00 Accounting Info: 05350-2025-60-302218-25233-2721136-0000000-00000 00 -0000000 Fund: 05350 Appr Year: 2025 Allottee: 60 Report Entity: 302218 Object Class: 25233 Program: 2721136 Project: 0000000 WFO: 0000000 Local Use: 0000000 Funded: $0.00 Accounting Info: 05350-2025-60-302218-25233-2721136-0000000-00000 00 -0000000 Fund: 05350 Appr Year: 2025 Allottee: 60 Report Entity: 302218 Object Class: 25233 Program: 2721136 Project: 0000000 WFO: 0000000 Local Use: 0000000 Continued... PAGE 5 OF 9 Docusign Envelope ID: F3A4071C-A0E0-8E0B-8022-91B21ED6D3C6

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/P00028 AMERICAN CENTRIFUGE OPERATING, LLC Funded: $0.00 Accounting Info: 05350-2025-60-302218-25233-2721136-0000000-00000 00 -0000000 Fund: 05350 Appr Year: 2025 Allottee: 60 Report Entity: 302218 Object Class: 25233 Program: 2721136 Project: 0000000 WFO: 0000000 Local Use: 0000000 Funded: $0.00 Accounting Info: 05350-2025-60-302218-25233-2721136-0000000-00000 00 -0000000 Fund: 05350 Appr Year: 2025 Allottee: 60 Report Entity: 302218 Object Class: 25233 Program: 2721136 Project: 0000000 WFO: 0000000 Local Use: 0000000 Funded: $0.00 Accounting Info: 05350-2025-60-302218-25233-2721136-0000000-00000 00 -0000000 Fund: 05350 Appr Year: 2025 Allottee: 60 Report Entity: 302218 Object Class: 25233 Program: 2721136 Project: 0000000 WFO: 0000000 Local Use: 0000000 Funded: $0.00 Accounting Info: 05350-2025-60-302218-25233-2721136-0000000-00000 00 -0000000 Fund: 05350 Appr Year: 2025 Allottee: 60 Report Entity: 302218 Object Class: 25233 Program: 2721136 Project: 0000000 WFO: 0000000 Local Use: 0000000 Funded: -$2,590,247.65 Change Item 00006 to read as follows(amount shown is the total amount): 00006 4,943,005.82CLIN 0006 Additional Scope - Infrastructure and Facility Repairs Line item value is: $4,943,005.82 Incrementally Funded Amount: $4,943,005.82 Continued... PAGE 6 OF 9 Docusign Envelope ID: F3A4071C-A0E0-8E0B-8022-91B21ED6D3C6

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/P00028 AMERICAN CENTRIFUGE OPERATING, LLC Accounting Info: 07900-2023-60-302218-25233-2721136-0000000-00000 00 -0000000 Fund: 07900 Appr Year: 2023 Allottee: 60 Report Entity: 302218 Object Class: 25233 Program: 2721136 Project: 0000000 WFO: 0000000 Local Use: 0000000 Funded: $0.00 Accounting Info: 07900-2024-60-302218-25233-2721136-0000000-00000 00 -0000000 Fund: 07900 Appr Year: 2024 Allottee: 60 Report Entity: 302218 Object Class: 25233 Program: 2721136 Project: 0000000 WFO: 0000000 Local Use: 0000000 Funded: $0.00 Accounting Info: 05350-2024-60-302218-25233-2721136-0000000-00000 00 -0000000 Fund: 05350 Appr Year: 2024 Allottee: 60 Report Entity: 302218 Object Class: 25233 Program: 2721136 Project: 0000000 WFO: 0000000 Local Use: 0000000 Funded: $0.00 Accounting Info: 05350-2024-60-302218-25233-2721136-0000000-00000 00 -0000000 Fund: 05350 Appr Year: 2024 Allottee: 60 Report Entity: 302218 Object Class: 25233 Program: 2721136 Project: 0000000 WFO: 0000000 Local Use: 0000000 Funded: $0.00 Accounting Info: 05350-2025-60-302218-25233-2721136-0000000-00000 00 -0000000 Fund: 05350 Appr Year: 2025 Allottee: 60 Report Entity: 302218 Object Class: 25233 Program: 2721136 Project: 0000000 WFO: 0000000 Local Use: 0000000 Funded: $0.00 Accounting Info: 05350-2025-60-302218-25233-2721136-0000000-00000 00 Continued... PAGE 7 OF 9 Docusign Envelope ID: F3A4071C-A0E0-8E0B-8022-91B21ED6D3C6

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/P00028 AMERICAN CENTRIFUGE OPERATING, LLC -0000000 Fund: 05350 Appr Year: 2025 Allottee: 60 Report Entity: 302218 Object Class: 25233 Program: 2721136 Project: 0000000 WFO: 0000000 Local Use: 0000000 Funded: $0.00 Accounting Info: 05379-2022-60-302218-25233-2721188-0000000-00000 00 -0000000 Fund: 05379 Appr Year: 2022 Allottee: 60 Report Entity: 302218 Object Class: 25233 Program: 2721188 Project: 0000000 WFO: 0000000 Local Use: 0000000 Funded: $0.00 Accounting Info: 05350-2025-60-302218-25233-2721136-0000000-00000 00 -0000000 Fund: 05350 Appr Year: 2025 Allottee: 60 Report Entity: 302218 Object Class: 25233 Program: 2721136 Project: 0000000 WFO: 0000000 Local Use: 0000000 Funded: $170,892.82 Change Item 00008 to read as follows(amount shown is the total amount): 00008 17,419,354.83Maintain the Cascade and Store SNM, 3-Month Option Period 1b (Phase 3) Embedded Lease: No Accounting Info: 08300-2025-60-302218-25233-2721270-0000000-00000 00 -0000000 Fund: 08300 Appr Year: 2025 Allottee: 60 Report Entity: 302218 Object Class: 25233 Program: 2721270 Project: 0000000 WFO: 0000000 Local Use: 0000000 Funded: $0.00 Accounting Info: 05350-2025-60-302218-25233-2721136-0000000-00000 00 -0000000 Fund: 05350 Appr Year: 2025 Allottee: 60 Continued... PAGE 8 OF 9 Docusign Envelope ID: F3A4071C-A0E0-8E0B-8022-91B21ED6D3C6