Oklo Signs Nuclear Fuel Letter of Intent with Centrus
4h ago|4 min readStandard
Fazen Markets Editorial Desk
Collective editorial team · methodology
oklocentrus-energy
Fazen Markets Editorial Desk
Collective editorial team · methodology
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Oklo Inc. and Centrus Energy Corp. signed a letter of intent for the potential supply of high-assay low-enriched uranium fuel on 18 June 2026. The agreement marks a critical step for Oklo’s planned commercial deployment of its Aurora microreactor, which requires the advanced fuel. This development provides a concrete pathway for securing a domestic supply of HALEU, a material currently unavailable at commercial scale in the United States. The announcement was made via a filing with the U.S. Securities and Exchange Commission.
The U.S. Department of Energy identified a lack of domestic HALEU supply as the single largest hurdle to deploying advanced nuclear reactors in a 2022 report. HALEU is enriched to between 5% and 20% uranium-235, compared to the 3-5% used in conventional light-water reactors. This higher enrichment enables longer core life, smaller reactor designs, and higher operating temperatures for advanced applications like industrial heat.
Centrus Energy began producing HALEU at its American Centrifuge Plant in Piketon, Ohio, in October 2023, under a cost-share agreement with the DOE. Its initial campaign is a demonstration, producing small quantities up to 900 kilograms annually. Scaling to commercial production of approximately 6,000 kilograms per year requires additional customer offtake agreements and significant capital investment.
The letter of intent was triggered by Oklo’s progress toward licensing its first commercial power plant. The company submitted a license application to the Nuclear Regulatory Commission for its second Aurora power plant in May 2026. Securing a fuel supply partner is a prerequisite for the NRC’s review of the plant’s operational safety and financial qualifications.
The Aurora microreactor design produces 15 megawatts of electricity. A single unit requires an initial core load of approximately 400 to 800 kilograms of HALEU, depending on the final core design and target fuel cycle length. Centrus’s planned commercial capacity of 6,000 kilograms per year could theoretically fuel between 7 and 15 new Aurora reactors annually.
Centrus’s demonstration contract with the DOE is valued at $150 million, with the department covering $117 million. The projected capital cost to achieve full commercial-scale production is estimated at $1 billion to $2 billion. Oklo’s first commercial plant is planned for Idaho National Laboratory, with a target operational date in the late 2020s.
The global spot price for uranium oxide concentrate reached $106 per pound in January 2024, its highest level in 16 years. Enrichment services represent a significant additional cost. The price for HALEU is not publicly traded, but industry estimates suggest it commands a substantial premium over standard reactor fuel due to its specialized production requirements.
Centrus Energy reported a market capitalization of $788 million as of 17 June 2026. Oklo is a privately held company that announced plans to go public via a merger with a special purpose acquisition company in July 2024. The combined entity was projected to have an equity value of approximately $850 million at that time.
This agreement directly benefits Centrus Energy as it secures a foundational customer for its nascent HALEU business. A firm offtake agreement would de-risk the capital expenditure needed to scale its Piketon plant, potentially making future project financing more accessible. For Oklo, locking in a domestic fuel supplier mitigates a major regulatory and supply chain risk, strengthening its value proposition to potential power plant customers and investors.
The development is a net positive for the broader advanced nuclear sector, including companies like TerraPower and X-energy, which also require HALEU. It signals progress in building a domestic industrial ecosystem, reducing reliance on Russian state-owned Tenex, which currently dominates the global enrichment market for higher assay fuels. Utilities and data center operators seeking carbon-free, firm power may view this as a step toward greater availability of advanced nuclear options.
A significant limitation is that a letter of intent is not a binding purchase agreement. It outlines a framework for negotiation but does not guarantee volume, price, or timing. Final terms are subject to Oklo’s successful reactor licensing, project financing, and final investment decisions for its plants, which carry inherent technical and regulatory risks.
Positioning flow has been cautious but constructive. Specialist energy and infrastructure funds have accumulated positions in uranium miners and enrichers like Centrus over the last 24 months, betting on a nuclear renaissance. Short interest in Centrus remains elevated at 12.5% of float, reflecting skepticism about the commercialization timeline and capital intensity of HALEU production.
The next major catalyst is the conversion of this letter of intent into a definitive, binding supply contract. Investors should monitor Oklo and Centrus public statements and SEC filings for an announcement. The NRC’s review of Oklo’s license application for its Idaho plant, expected to take 24-36 months from submission, is the critical path item for turning fuel demand into firm orders.
Centrus must secure the necessary capital to expand beyond its demonstration phase. Watch for news on project financing, potential DOE loan guarantees under the Title 17 program, or strategic investment from partners. The DOE’s request for proposals from HALEU buyers, issued in March 2026, could also catalyze additional offtake agreements from other advanced reactor developers by the end of the year.
Key levels to monitor include Centrus’s stock price holding above its 200-day moving average of $42.50, which would indicate sustained bullish momentum. In the uranium market, maintaining a spot price above $90 per pound supports the economic case for new enrichment capacity investment. A break below $80 could delay final investment decisions across the fuel cycle.
HALEU stands for high-assay low-enriched uranium. It is fuel enriched to between 5% and 20% uranium-235, compared to the 3-5% used in existing nuclear power plants. This higher enrichment is essential for the next generation of advanced reactor designs, including small modular reactors and microreactors. HALEU enables more compact cores, longer intervals between refueling, and higher temperature operation for industrial processes. Its commercial scarcity has been a primary bottleneck for the advanced nuclear industry.
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