Jacob DeWitte
Data verified as of Jul 20, 2026
Oklo is developing fast-fission power plants under its Aurora product line while building a vertically integrated nuclear business around power sales, fuel recycling, and radioisotopes. Aurora units are designed to produce 15-75 MWe and run on fresh, recycled, or down-blended fuel, targeting customers such as data centers, industrial sites, military facilities, utilities, and remote communities. Its first plant, Aurora-INL at Idaho National Laboratory, is advancing under DOE's Reactor Pilot Program — the DOE approved its Preliminary Documented Safety Analysis on June 11, 2026, leaving the final Documented Safety Analysis as the last safety-basis step before authorization. Oklo is deepening vertical integration through the June 2026 acquisitions of Oak Ridge precision manufacturer ARMEC and sodium-systems engineering firm Creative Engineers, plus its May 2026 selection for DOE's Surplus Plutonium Utilization Program, while Atomic Alchemy builds U.S. isotope supply, including the Groves test reactor in Texas that is targeting criticality in 2026.
Company OverviewRead the long-form profile of Oklo
Oklo's fast-fission powerhouse product line is designed for build-own-operate deployment, targeting customers that want firm clean power in a smaller footprint than traditional large reactors.
Oklo is advancing Aurora-INL under DOE's Reactor Pilot Program with construction underway. The NRC approved its Principal Design Criteria topical report in May 2026 and the DOE approved its Preliminary Documented Safety Analysis on June 11, 2026, leaving only the final Documented Safety Analysis before authorization. The company targets first deployment in late 2027-2028 with subsequent NRC licensing for commercial operations.
Oklo is developing an advanced fuel center to recycle used nuclear fuel and fabricate metal fuel for Aurora and other fast-reactor applications.
The first phase is a Tennessee fuel recycling facility; Oklo has completed a licensing project plan with the NRC and is in pre-application engagement, with metal fuel production targeted for the early 2030s.
Oklo's isotope business combines the Idaho Radiochemistry Laboratory, a planned pilot reactor in Texas, and a future multi-reactor foundry to supply critical medical, industrial, research, defense, and space isotopes.
A March 2026 NRC materials license enables initial commercial sales from Idaho. The DOE approved the Nuclear Safety Design Agreement for the Groves Isotopes Test Reactor in Lockhart, Texas on March 17, 2026, then approved its Documented Safety Analysis — the facility's final safety-basis document — on July 1, 2026 under the Reactor Pilot Program. Only a DOE readiness review and startup approval remain before fuel loading; Oklo is targeting first criticality at Groves in July 2026 while advancing longer-term VIPR foundry plans.
Carry Aurora-INL through final safety review and construction
With the DOE's Preliminary Documented Safety Analysis approved on June 11, 2026 — the third of four major Reactor Pilot Program authorization steps — Oklo's near-term focus is securing the final Documented Safety Analysis, the last safety-basis document before DOE authorizes operation, while completing construction at Idaho National Laboratory ahead of fuel loading and first power.
Build out the advanced fuel center
The Tennessee recycling facility is intended to become the first phase of Oklo's broader advanced fuel center, with metal fuel production targeted for the early 2030s after regulatory review. A June 2026 MOU with TRISO fuel maker Standard Nuclear adds Oklo's first third-party offtake pathway for recycled material.
The U.S. Department of Energy approved the Documented Safety Analysis for Oklo's Groves Isotope Test Reactor in Lockhart, Texas, the facility's final safety-basis document, advancing the project under the DOE's Reactor Pilot Program. The remaining steps are a DOE readiness review and startup approval, after which the facility can load fuel and begin startup testing. Oklo is targeting first criticality for Groves in July 2026.
Oklo and Centrus Energy signed a letter of intent on June 18 for Centrus to supply domestic high-assay low-enriched uranium (HALEU) to power up to five of Oklo's Aurora powerhouses for multiple years, with deliveries slated to begin in 2029 — one of the first large-scale commercial HALEU supply agreements, and one that could include prepayments from Oklo. The fuel would support Oklo's planned 1.2-gigawatt Clean Energy Campus in southern Ohio. Separately, Oklo signed a memorandum of understanding with Kiewit Nuclear Solutions to support engineering, procurement and construction planning for the initial Aurora deployments at the site.
Oklo entered a memorandum of understanding with TRISO fuel maker Standard Nuclear on June 16 to collaborate on nuclear fuel recycling and advanced fuel manufacturing, in what it called its first third-party offtake pathway for recycled material. The companies will jointly evaluate specifications, commercial terms, and delivery schedules for reprocessed uranium and uranium-transuranic streams from Oklo's planned recycling facility in Oak Ridge, Tennessee, which could feed Standard Nuclear's TRISO fuel production. Both firms were among five selected by the U.S. Department of Energy for advanced negotiations under its Surplus Plutonium Utilization Program.
The U.S. Department of Energy on June 11 approved the Preliminary Documented Safety Analysis for Oklo's Aurora powerhouse at Idaho National Laboratory, a major step on the authorization pathway under the department's Reactor Pilot Program. The review covered the project's hazard and accident analysis, safety controls, and design commitments for what would be Oklo's first commercial fast-fission plant, and Oklo shares rose roughly 5% on the news. The approval follows Oklo's June 4 close of its acquisition of Oak Ridge precision-manufacturing firm ARMEC, which added about 40 engineers and technicians.
Antares Nuclear's Mark-0 sodium heat-pipe microreactor achieved zero-power criticality at Idaho National Laboratory on June 4, 2026, becoming the first privately developed advanced reactor to reach that milestone under the Department of Energy's Reactor Pilot Program — a Trump executive-order initiative targeting at least three advanced reactor criticalities by July 4. The Mark-0 is fueled by HALEU TRISO compacts and uses a heat-pipe-cooled, fast-spectrum design initially targeting U.S. military bases, with commercial electricity sales targeted for late 2027 and full deployment by end of 2028 — at the same Idaho National Laboratory campus where Oklo is constructing its Aurora powerhouse under an NRC-issued combined construction and operating license. The DOE has selected eleven advanced reactor projects under the RPP, and the Antares milestone validates the regulatory testing infrastructure and fast-fission design path that underpins the broader U.S. advanced nuclear build-out.
Still pre-revenue at the consolidated level (Q1 2026 revenue of $0 and a $33.1M net loss), with no commercial power plants operating yet. Aurora-INL is under construction and is advancing through DOE's Reactor Pilot Program safety-basis path — the DOE approved its Principal Design Criteria topical report (May 2026) and Preliminary Documented Safety Analysis (June 11, 2026), the third of four major Reactor Pilot Program steps toward construction authorization (after the Other Transaction Agreement and Nuclear Safety Design Agreement), leaving only the final Documented Safety Analysis before DOE authorizes operation. Oklo is deepening vertical integration via the June 2026 ARMEC manufacturing acquisition and targets first deployment in late 2027-2028 while scaling its power, fuel-cycle, and isotope business lines in parallel.
Power Purchase Agreements & Prepayments
Oklo's core business model is to build, own, and operate Aurora powerhouses and sell electricity or heat under long-term agreements. Current commercial traction includes a 12 GW master power agreement with Switch, a prepayment agreement with Meta for a planned 1.2 GW Ohio campus, and additional LOIs with Equinix, Diamondback Energy, and Prometheus.
Atomic Alchemy's March 2026 NRC materials license enables initial commercial isotope sales and processing activity from the Idaho Radiochemistry Laboratory.
Fuel-Cycle & Manufacturing Infrastructure
Oklo is developing fuel fabrication and recycling capabilities that can secure fuel supply for Aurora deployments and potentially support broader domestic advanced-reactor infrastructure over time. Two June 2026 acquisitions add in-house engineering and manufacturing depth: Oak Ridge, Tennessee manufacturer ARMEC brings fabrication, machining and welding capacity, and Creative Engineers, Inc. adds specialized sodium, NaK and lithium liquid-metal systems expertise for the Aurora sodium-cooled fast reactor.
The U.S. Department of Energy selects Oklo on May 26 — alongside Exodys Energy, SHINE Technologies, Standard Nuclear, and Flibe Energy — for advanced negotiations under the Surplus Plutonium Utilization Program. Oklo will partner with European fast-reactor developer newcleo to convert U.S. surplus plutonium into fuel for the Aurora powerhouse, broadening its fuel-supply pathway alongside HALEU.
On June 4, 2026 Oklo completes the acquisition of ARMEC, an Oak Ridge, Tennessee precision manufacturing and engineering firm founded in 2002 with roughly 40 engineers, fabricators, machinists and technical staff serving nuclear, energy and defense markets. The deal adds in-house fabrication, machining and welding capability to support Oklo's advanced reactor and fuel-manufacturing programs and tighten control over its deployment timeline.
On June 11, 2026 the DOE's Idaho Operations Office approves the Preliminary Documented Safety Analysis (PDSA) for the Aurora powerhouse at Idaho National Laboratory under the Reactor Pilot Program — a detailed review of the plant's hazard analysis, accident analysis, safety controls and design commitments. It leaves the final Documented Safety Analysis as the last safety-basis document before authorization. CEO Jacob DeWitte called it an important milestone that helps establish a foundation for future Aurora deployments.
On June 16, 2026 Oklo signs a memorandum of understanding with TRISO fuel maker Standard Nuclear to collaborate on nuclear fuel recycling and advanced fuel manufacturing — Oklo's first third-party offtake pathway for recycled material. The companies will jointly evaluate specifications, commercial terms and delivery schedules for reprocessed uranium and uranium-transuranic streams from Oklo's planned Oak Ridge, Tennessee recycling facility, which could feed Standard Nuclear's TRISO fuel; both firms were among five selected by the DOE for the Surplus Plutonium Utilization Program.
On June 18, 2026 Oklo and Centrus Energy sign a letter of intent for Centrus to supply enough domestic high-assay low-enriched uranium (HALEU) to power up to five Aurora powerhouses for multiple years, with deliveries beginning in 2029 — one of the first large-scale commercial HALEU supply agreements, and one that could include prepayments from Oklo to support fuel for its planned 1.2 GW Clean Energy Campus in southern Ohio. Oklo separately signs an MOU with Kiewit Nuclear Solutions to support engineering, procurement and construction (EPC) planning for the initial Aurora deployments at the site.
On June 30, 2026 Oklo acquired Creative Engineers, Inc. (CEI), a chemical process engineering firm founded in 1996 with deep expertise in sodium, sodium-potassium (NaK), and lithium liquid-metal systems, adding roughly 20 engineers, fabricators and welders. CEI's portfolio spans landmark U.S. sodium reactor programs including the Fast Flux Test Facility, Fermi 1, and Experimental Breeder Reactor II, directly supporting Oklo's Aurora sodium-cooled fast reactor and extending the vertical-integration push begun with the June 4 ARMEC acquisition. Financial terms were not disclosed.
On July 1, 2026 the DOE approved the Documented Safety Analysis for Oklo's Groves Isotope Test Reactor in Lockhart, Texas — the facility's final safety-basis document — under the Reactor Pilot Program. With the analysis approved, the project moves into DOE's final pre-startup phase of a readiness review and startup approval, after which Groves can load fuel and begin startup testing. Oklo is targeting first criticality at Groves in July 2026, positioning it among the first privately funded advanced reactors on privately owned land with commercially sourced fuel and systems.