Oklo signs HALEU contracts with Centrus for Aurora reactors in Ohio

Oklo has signed multiple definitive, multi-year contracts with Centrus Energy for high-assay low-enriched uranium (HALEU), enough to fuel up to five of its Aurora powerhouses for multiple years, the companies said on November 12, 2026. Deliveries from Centrus's American Centrifuge Plant in Pike County, Ohio, are scheduled to begin in 2029, and Oklo will make prepayments for them to support construction of new US enrichment capacity. The fuel is meant for the first phase of Oklo's planned 1.2 GW power campus in Ohio, future Aurora projects, and later refueling of Oklo's first Aurora in Idaho. The release gives no tonnage, no contract value and no size for the prepayments.

Meta's money is behind it, at one remove. The HALEU purchase "is supported by Meta's prepayment for future Oklo power production," the release says. That prepayment comes from the agreement Oklo and Meta announced on January 9, 2026, which gives Meta a way to prepay for power and fund Oklo's Aurora deployment at a Pike County campus meant to support Meta's data centers in the region. Oklo said then it would use the funds to secure nuclear fuel and advance Phase 1, with the first phase targeted to come online as early as 2030 and the campus expanding incrementally to the full 1.2 GW by 2034.

Signed before it was announced

The deal was in both companies' quarterly reports before it was in a press release. Oklo's 10-Q, filed November 6, says the company entered a HALEU supply agreement with Centrus on September 30, 2026, in connection with the Meta prepayment agreement and "subject to certain conditions." It adds that on November 2, 2026, "an initial funding amount from Meta was released from escrow and paid directly to Centrus as a credit towards fuel orders." Meta's money has already reached the enrichment company; the filing does not say how much. Centrus's 10-Q, filed November 5, says the June 2026 letter of intent with Oklo "has since been definitized." The November 12 release speaks of multiple contracts, where Oklo's filing describes one supply agreement.

Five Auroras are also a small share of the campus. Oklo's 10-Q says initial Aurora designs target outputs of 15 to 75 MWe, so five units of those initial designs would come to at most 375 MWe by our arithmetic, under a third of 1.2 GW. That fits the release's framing: the HALEU "secures fuel for the first phase" of the Ohio campus. Oklo's filing also says it continues to explore, and has held discussions with, additional potential HALEU suppliers "to support our initial powerhouse developments and planned subsequent scaling." Its first Aurora, in Idaho, has an allocation of recovered fuel from the Experimental Breeder Reactor II, per the release.

Centrus's prepaid order book

For Centrus, Oklo joins a line of reactor developers paying ahead for enrichment capacity that is still being built. Its 10-Q says it signed long-term supply agreements in the third quarter of 2026 with X-energy, Radiant and Antares, and that all three "include prepayments to Centrus to support the development of our domestic commercial enrichment facilities in Piketon and Oak Ridge." We covered the Radiant contract in Centrus signs HALEU supply contract for Radiant's Kaleidos microreactors.

Centrus has stacked about $5.4 billion of contingent contracts and commitments on Piketon capacity it has yet to build. Its 10-Q puts the company's backlog at $7.0 billion as of September 30, 2026, about $6.2 billion of it in the LEU segment; of that $6.2 billion, about $5.4 billion was contingent LEU and HALEU sales contracts and commitments, $5.1 billion of them under definitive agreements, in support of potential new production capacity at Piketon. "The contingent sales commitments tend to relate to achievement of operational milestones," the filing says. The November 12 release says Centrus "has now secured $5.4 billion" in contracts and commitments from the new capacity: the same figure it reported as of September 30, the day Oklo dates its supply agreement.

The hardware has started to move. Centrus completed its first new centrifuge at Oak Ridge, Tennessee, and was shipping it on October 29, 2026, as we reported in our late-October fuel roundup, with the first new capacity expected online in Ohio in 2029. That is the year the Oklo deliveries are scheduled to start.

The fuel would not travel far. Centrus's 10-Q says the HALEU deconversion joint venture it is exploring with Oklo, announced in March 2026, would sit at Piketon, "to be co-located with Centrus' enrichment operations and adjacent to Oklo's planned 1.2 GW power campus." Deconversion services for HALEU "currently do not exist commercially," the filing says. Oklo's campus is to be built on 206 acres in Pike County that the company owns and that the Department of Energy formerly owned, per the January release.

Outlook

The schedules leave little slack. If Centrus's first new capacity arrives in Ohio in 2029 and Oklo's first Ohio phase holds to the as-early-as-2030 target it set in January, the first deliveries and the first power are about a year apart. Both companies attach conditions: Oklo's supply agreement is subject to conditions its filing does not spell out, and Centrus says its contingent commitments tend to depend on operational milestones. A slip at either end would show up at the other. For where Oklo's Aurora and the wider field stand, see Advanced reactors in the US: SMRs and microreactors; for why so many new designs need HALEU, see What are SMRs and microreactors?.