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    OKLO
    Earnings call· Jun 2026(Q2 FY26)

    Oklo Q2 FY26 earnings call OKLO

    Aug 7, 2026 Source

    Executive summary

    Oklo Q2 FY26 — Groves Reactor Achieves Criticality, Accelerating Execution Capabilities

    Oklo achieved a significant milestone with the Groves isotope facility reaching first criticality in record time, demonstrating its integrated build, own, and operate model. This execution capability, combined with strategic acquisitions and a diversified fuel strategy, underpins the company's approach to scaling its nuclear technology platform across power, fuel, and isotopes. The company is leveraging its strong balance sheet to accelerate critical path items for its Aurora powerhouses, despite increased capital expenditure and operating cash burn.

    Highlights

    5
    • Groves isotope facility achieved first criticality in under 11 months from groundbreaking, a record pace for a privately funded reactor.

    • Secured $1.9 billion in additional capital year-to-date through ATM programs, ending Q2 with $3 billion in cash and marketable securities.

    • Acquired ARMEC and Creative Engineers, Inc. to strengthen internal engineering, manufacturing, and specialized systems capabilities.

    • Advanced Aurora-INL with DOE approval of the preliminary documented safety analysis (PDSA) and site excavation near completion.

    • Signed a Letter of Intent with Centrus for HALEU supply for up to 5 Aurora powerhouses, with deliveries expected to begin in 2029.

    Concerns

    2
    • Updated 2026 cash used in operating activities guidance to $120M-$150M, up from $80M-$100M, reflecting first-of-a-kind project costs and accelerated early-stage deployment.

    • Updated 2026 cash used for property, plant, and equipment guidance to $400M-$500M, up from $350M-$450M, due to accelerated procurement and an opportunistic field purchase.

    Guidance & targets

    6
    CategoryTargetConfidence
    Cash used in operating activities
    $120M-$150M
    medium materiality
    High
    Cash used for purchases of property, plant and equipment (PP&E)
    $400M-$500M
    medium materiality
    High
    Aurora-INL startup
    2028 startup
    high materiality
    High
    Aurora fuel fabrication facility (A3F) installation and start-up
    2027
    medium materiality
    High
    First revenue from isotope business (Idaho lab)
    First part of next year
    low materiality
    Medium
    Centrus HALEU deliveries
    Begin in 2029
    high materiality
    High

    Operational metrics

    19
    Net loss
    $81.6M
    YTD Q2 FY26

    Year-to-date net loss.

    Loss from operations
    $124.2M
    YTD Q2 FY26

    Year-to-date loss from operations.

    Net interest and dividend income
    $44.5M
    YTD Q2 FY26

    Year-to-date net interest and dividend income, offsetting loss from operations.

    Cash used in operating activities
    $65.5M
    YTD Q2 FY26

    Year-to-date cash used in operating activities, including net loss adjusted for noncash charges and working capital.

    Stock-based compensation (noncash charge)
    $29.9M
    YTD Q2 FY26

    Noncash charge from stock-based compensation.

    Net changes in working capital and other adjustments
    $13.8M
    YTD Q2 FY26

    Net changes in working capital and other adjustments.

    Cash used in investing activities
    $912.7M
    YTD Q2 FY26

    Year-to-date cash used in investing activities.

    Net cash used for purchases of marketable securities
    $743.6M
    YTD Q2 FY26

    Included in cash used in investing activities.

    Capital spend (PP&E)
    $126.9Mincreased
    YTD Q2 FY26

    Increased as planned investments continued across all three business lines.

    Cash and marketable securities
    $3B
    Q2 FY26

    Total balance at the end of the second quarter.

    Cash and cash equivalents
    $1.6B
    Q2 FY26

    Component of total cash and marketable securities.

    Marketable securities
    $1.4B
    Q2 FY26

    Component of total cash and marketable securities.

    Capital generated from ATM programs
    $1.9B
    YTD FY26

    Additional capital generated from ATM programs in 2026.

    Groves first criticality timeline
    11 months
    September 2025 - August 2026

    Time from groundbreaking to first criticality for Groves facility.

    Groves construction timeline
    229 days
    September 2025 - March 2026

    Substantial construction completed in this period.

    DOE Genesis mission award (Prometheus project)
    $60M
    Phase I over 3 years

    Phase I award for Prometheus project, subject to appropriations.

    DOE Genesis mission partner commitments
    $800M
    mission wide

    More than $800 million in mission wide partner commitments announced by DOE.

    Plutonium allocation tranche
    20 tons
    null

    Overall total plutonium being allocated in this tranche, to be divided across recipients.

    Plutonium content for HALEU equivalent
    10%-13%
    null

    Plutonium content when blended with depleted or natural uranium to achieve HALEU equivalent performance.

    Deals & partnerships

    8
    U.S. Department of Energy (DOE)Participation in Genesis mission$60M3 years

    Oklo is participating in the Prometheus project, selected for a $60M Phase I award over 3 years, subject to appropriations.

    NVIDIA and Los Alamos National LaboratoryCollaboration on AI for nuclear fuels

    Working to develop and deploy physics and chemistry-based AI models, digital twins, modeling and simulation tools to accelerate fuel validation and improve nuclear facility design/operation.

    KiewitEngineering, Procurement, Construction (EPC) planning for Aurora, Ohio campus

    Builds on existing relationship at Aurora-INL, aiming to establish repeatable approaches for multiple Aurora powerhouses.

    ARMECAcquisition of specialized engineering, manufacturing, and testing capabilities

    Strengthens manufacturing, engineering, and specialized systems capabilities.

    Creative Engineers, Inc. (CEI)Acquisition of expertise in sodium and alkali metal systems

    Adds roughly 30 years of experience in sodium and other alkali metal systems.

    CentrusLetter of Intent for HALEU supplymultiple years

    Supports creation of a domestic supply pathway for initial core and reload needs.

    U.S. Department of Energy (DOE)Advanced negotiations for surplus plutonium

    Oklo selected for advanced negotiations regarding surplus plutonium that could be fabricated into reactor fuel. Subject to final DOE agreement, safeguards, and material allocation.

    Standard NuclearPotential third-party commercial pathway for recycled material

    Relationship creates a potential third-party commercial pathway for recycled material.

    Capital programs

    5
    Aurora-INLunderway

    Anchor deployment and foundation for future Aurora projects. Site mobilization underway, excavation for reactor area near completion. DOE approval of preliminary documented safety analysis (PDSA) achieved.

    Aurora, Ohio 1.2-gigawatt clean energy campusplanning1.2 GW

    Benefit: 1.2 GW

    Planned campus designed around phased deployment of multiple powerhouses. MOU with Kiewit to support EPC planning. Advancing PJM interconnection applications.

    Aurora fuel fabrication facility (A3F)underway

    Benefit: Fabricate fuel for first Aurora core (Aurora-INL)

    Equipment is now in production, supporting planned installation and start-up activities in 2027. Intended to convert EBR-II used fuel.

    Advanced Fuel Center (Tennessee)planning

    Benefit: Establish domestic recycling capability and expand long-term fuel supply.

    Facility and process line engineering progressing. NRC license application readiness work underway. Civil engineering and site grading permitting advancing.

    Groves isotope facilitycompleted
    Funding: private capital
    Start: September 2025 (groundbreaking)

    Benefit: Operating nuclear isotope facility, achieved first criticality.

    Achieved first criticality in under 11 months from groundbreaking. Built on private land, financed with private capital. DOE provided safety oversight.

    Risks & headwinds

    4
    Fuel availability and supply chain constraintsLong-term

    Not quantified, but described as "one of the most important constraints on advanced nuclear deployment."

    Mitigation: Diversified fuel strategy (commercial HALEU, government materials, recycling), strategic acquisitions (ARMEC, CEI) to strengthen internal capabilities, accelerated procurement, and integrated EPC planning.

    Plutonium allocation timingNear-term to mid-term

    Not quantified.

    Mitigation: Not under Oklo's direct control, but company is engaged in the process.

    PJM interconnection challenges and backlogNear-term to mid-term

    Not quantified.

    Mitigation: Participating in the interconnection process with multiple applications, actively managing the turnaround time, not relying on just one avenue.

    Data center perception gapsOngoing

    Not quantified.

    Mitigation: Hyperscalers need to better communicate their story, engage with communities, and highlight benefits like low water usage for next-gen systems.

    What to watch in Q3 FY26

    5

    Plutonium allocation decision

    Next quarter
    CurrentAdvanced negotiations with DOE for surplus plutonium.
    TargetFinal DOE agreement and material allocation.

    Why it matters

    Securing this bridge fuel is crucial for earlier deployments and overall fuel strategy diversification.

    That timing is really being not dictated by Oklo. So I would not want to throw out a date because it's really not under our control. But I guess the flipped answer is we're closer than we were.

    Q&A highlights

    7

    Update on plutonium allocation timeline and comparison of measured reactivity coefficients to models for the fast plutonium system.

    Plutonium allocation is still developing with DOE, part of a 20-ton tranche. The fast reactor system demonstrated incredibly strong reactivity feedback coefficients, stabilizing quickly, validating models.

    The reactivity feedback coefficients, the overall behavior, all those things that we did, the Power maneuvers, all those things that we went through and that came out generally in the expected ranges, I'd say, is what we calculated.

    asked by Nate Pendleton · answered by Jacob Dewitte

    3 min read7 chapters

    Detailed Narrative

    01

    DOE Genesis Mission and Nuclear Life Cycle Innovation Campuses

    Oklo is actively participating in the DOE's Genesis mission, an $800M initiative leveraging national labs, AI, and advanced computing to accelerate nuclear deployment. Oklo's Prometheus project received a $60M Phase I award over three years. Additionally, Oklo is engaging with five states selected as potential hosts for DOE's Nuclear Life Cycle Innovation Campuses, which aim to integrate fuel fabrication, enrichment, recycling, and reactor development, offering significant economic potential by tapping into vast energy reserves from used fuel.

    02

    Integrated Nuclear Technology Platform

    Oklo emphasizes its strategy of building a single integrated nuclear technology platform across power, fuel, and isotopes, rather than three isolated businesses. This vertical integration, encompassing fuel sourcing, fabrication, and recycling, aims to capture value across the entire nuclear asset life cycle. This model is designed to improve capital efficiency, expand financing options, and support faster, more scalable deployment by reducing direct capital investment per megawatt while preserving recurring revenue opportunities.

    03

    Groves First Criticality and Execution Capabilities

    The Groves isotope facility achieved first criticality in under 11 months from groundbreaking, a record pace for a privately funded, greenfield reactor. This milestone validated not only the reactor but also Oklo's in-house execution engine, including construction, authorization, commissioning, and operations. The experience gained, from site design and permitting to operator training and federal safety reviews, provides a repeatable blueprint and significantly reduces execution uncertainty for future nuclear assets across the platform.

    04

    Aurora-INL Progress and Ohio Campus Planning

    Oklo is advancing its Aurora-INL project, with DOE approval of the preliminary documented safety analysis (PDSA) and site excavation nearing completion. The company is applying lessons learned from Groves to manage construction, supplier coordination, and regulatory reviews. For the larger Aurora, Ohio, 1.2 GW clean energy campus, Oklo entered an MOU with Kiewit for EPC planning, aiming to establish repeatable approaches for fleet deployment and integrating PJM interconnection applications.

    05

    Strategic Acquisitions and Internal Capabilities

    During the quarter, Oklo acquired ARMEC and Creative Engineers, Inc. (CEI) to strengthen its internal manufacturing, engineering, and specialized systems capabilities. ARMEC contributes to Aurora-INL's engineering and procurement, leveraging its manufacturing capabilities and talent access in Oak Ridge. CEI brings 30 years of experience in sodium systems, supporting both reactor and recycling organizations. These acquisitions shorten feedback loops between design, manufacturing, and deployment, enhancing execution across all business lines.

    06

    Diversified Fuel Strategy

    Oklo is building a diversified domestic fuel supply across sourcing, fabrication, and recycling to ensure long-term fuel availability for its Aurora deployments. This includes a Letter of Intent with Centrus for commercial HALEU supply (up to 5 powerhouses, deliveries starting 2029), advanced negotiations with DOE for surplus plutonium as a bridge fuel, and the development of its Aurora Fuel Fabrication Facility (A3F) for EBR-II used fuel and an Advanced Fuel Center in Tennessee for recycling.

    07

    AI Integration in Design and Operations

    Oklo is leveraging artificial intelligence through collaborations with NVIDIA and Los Alamos National Laboratory. This work focuses on developing physics and chemistry-based AI models, digital twins, and simulation tools to accelerate fuel validation, improve reactor design workflows, and optimize operations. AI is expected to significantly reduce design and analysis timelines from months to hours, leading to higher-performing designs and lower costs per extracted power.

    AI-generated summary of the company’s earnings call. Not investment advice.