X-energy (XE) Q3 2026 earnings review
X-energy wins its first reactor permit, but losses double
X-energy, a developer of small modular nuclear reactors and fuel, cleared its biggest regulatory hurdle ahead of schedule while spending more cash to build its first facilities. Third-quarter revenue and grant income more than doubled from a year ago to $66 million as federal cost-share reimbursements rose with engineering work. However, operating loss also more than doubled to $104 million, and by our math liquidity fell by $94 million to $1.81 billion.
| Revenue and grant income | $66.3M +118% from a year ago |
|---|---|
| Loss excluding one-offs | -$56.8M -$32.7M a year ago |
| Total cash and investments | $1.81B $1.90B last quarter |
| Dow Texas construction permit | Approved ahead of Q1 2027 plan |
⚖️ Verdict: 🟢 Bullish
The story got better because federal regulators approved the construction permit for Dow's Texas reactor site over a month early, removing a major schedule risk before 2027. Chief executive J. Clay Sell also signed American Electric Power and Amazon to evaluate a 12-reactor project in Indiana and completed the outer shell of the Tennessee fuel plant on time. One caution: the Indiana deal is a feasibility agreement that left the 144-reactor pipeline unchanged, while customer prepayments on the balance sheet shrank.
The question now is how much of X-energy's $1.81 billion cash pile will be consumed building the first Texas plant and the Tennessee fuel campus before paying customers take over. Either the federal cost-share and partner funding cover most of the construction bill, or rising unshared costs force the company to raise more money before commercial revenue arrives in the 2030s. Disclosure of the Dow construction budget and the fourth-quarter cash burn will tell.
🐂 Bull Case
Regulators Approved the First Reactor Site Early
X-energy designs the Xe-100, a small modular nuclear reactor (SMR) cooled by gas rather than water. Its first project will supply power and industrial steam to a Dow chemical plant in Seadrift, Texas. The company previously aimed to receive its federal construction permit by the first quarter of 2027, making regulatory delay a key risk.
“The NRC recently issued the construction permit for Dow’s Long Mott project in Texas and it was received over a month ahead of schedule,” chief executive J. Clay Sell said. The Nuclear Regulatory Commission (NRC), the federal agency that licenses nuclear plants, approved the application before the end of 2026. Sell noted this is the first permit “for an advanced nuclear project site designed to provide industrial process heat”.
This approval removes the regulatory hurdle for the Texas site because X-energy and Dow can now legally build the nuclear island. It also helps overseas, as British regulators accepted the Xe-100 into their three-year Generic Design Assessment (GDA) review process and will use the US safety analyses.
What to watch: the final investment decision and the start of site construction with Dow in Texas. Starting physical reactor construction will prove that regulatory approval turns into commercial building.
Fuel Plant and Supply Chain Hit Targets
The Xe-100 reactor runs on TRISO-X, a specialized nuclear fuel made of uranium particles coated in carbon and ceramic Pebbles. To supply this fuel and build reactors on time, X-energy is constructing its first fuel plant, TX-1, in Oak Ridge, Tennessee, and locking in component suppliers.
The nuclear developer finished the outer vertical shell of TX-1 on schedule in the third quarter. The facility now moves into “interior buildout, installation of fuel fabrication equipment and continued construction of supporting facilities”. The group also placed its first order for steam generator steel tubing with Alleima and Doosan Enerbility, and hired Fluor to design its second reactor project in Washington.
Hiring Fluor for a second site matters because X-energy is “targeting long-term cost and schedule reductions through standardization and highly repeatable project execution”. Completing the TX-1 shell keeps the fuel plant on track for operations in the first half of 2028, when it should make enough fuel for 11 reactors.
What to watch: equipment installation progress at TX-1 over the next two quarters. Staying on schedule is necessary to hit the 2028 fuel production target.
Government Cost-Share Kept Pace With Rising Spend
Because X-energy has not yet built a commercial reactor, nearly all of its revenue comes from engineering services and government cost-sharing. Under the Advanced Reactor Demonstration Program (ARDP), the US Department of Energy (DOE) reimburses about half of the company's eligible development spending.
Total revenue and grant income more than doubled from a year ago to $66.3 million, up 21.5% from last quarter. The DOE program drove $29.3 million of the $35.9 million yearly increase as the developer spent more on subcontractors, materials, and engineers. By our math, revenue and grant income covered 70.9% of direct project costs this quarter, up from 63.0% in the second quarter.
That 70.9% recovery rate sits near the top of its historical 60% to 72% range, showing that government reimbursements are keeping up as engineering work expands. In addition, the DOE reimbursed $27.8 million of capital spending on facilities in the third quarter by our math, offsetting over a third of the $71.8 million gross capital bill.
What to watch: the ratio of total revenue and grant income to direct costs in the fourth quarter. A reading above 60% will show that DOE funding continues to match engineering spend.
🐻 Bear Case
Indiana Utility Deal Left Total Pipeline Flat
Management wants investors to see a growing list of future reactor orders. Sell highlighted a new Joint Development Agreement (JDA) with utility American Electric Power (AEP) “to advance feasibility work for a proposed 960 MW Xe-100 SMR project in Indiana”. He said this 12-reactor plan is the “second announced commercial deployment opportunity supported by Amazon and gives us greater visibility into our path toward deployment”.
Yet X-energy's total pipeline did not grow, and its customer prepayment balance shrank.
- Expected project pipeline: 144 reactors and 11.5 gigawatts, unchanged from the first and second quarters
- Total long-term deferred revenue: $26.1 million by our math, down 13.8% from $30.3 million last quarter
- Related-party deferred revenue: $13.3 million, down $4.2 million from June
The AEP agreement moved an existing slot in the Amazon partnership into named feasibility work rather than adding new reactors beyond the 144 already counted. Moreover, the 144-reactor figure still rests on the assumption “assuming each customer exercises its contingent rights in full”. Because deferred revenue — cash customers pay upfront for future work — fell by $4.2 million, the new deal did not bring a net wave of upfront customer cash in the third quarter.
What to watch: Energy Northwest's construction permit application in the first half of 2027. Filing that application will show a second customer is moving from feasibility studies toward binding construction.
Losses Doubled as Unreimbursed Costs Grew
Because the DOE only shares the cost of approved ARDP activities, X-energy loses money on every dollar of direct project work and pays 100% of its own corporate overhead and second fuel plant (TX-2) design costs. As the company hires staff and orders parts, its losses and cash burn grow alongside its revenue.
- Operating loss: $103.6 million, more than double the $40.7 million loss a year ago
- Direct project costs: 141.0% of revenue, up 13.4 percentage points from 127.6% a year ago
- Selling, general and administrative overhead: 114.6% of revenue, up 9.0 percentage points from 105.6% a year ago
- Third-quarter free cash flow (operating cash flow minus gross capital spending): -$123.1 million by our math, worse than -$74.6 million a year ago
Stock grants tied to the April initial public offering accounted for $26.9 million of third-quarter expenses, but loss excluding one-offs still widened 73.6% to $56.8 million. Overhead included $8.5 million for corporate contractor projects such as designing TX-2, which the DOE does not reimburse.
What to watch: quarterly operating cash burn and gross capital expenditures in the fourth quarter. If cash outflows stay near $100 million a quarter after grant reimbursements, the $1.8 billion cash pile will shrink steadily before reactors generate revenue.
Risks this quarter didn't answer
Three financial commitments that govern how far X-energy's $1.8 billion in liquidity will stretch received no new numbers in the third-quarter earnings release.
- Total Dow Seadrift project cost and X-energy's 50% matching share: still undisclosed; a published budget for the first reactor plant will show how much of the cash pile the first project requires.
- Formal obligation of the extra $1 billion DOE award: the release did not state whether the government has contractually obligated the additional funds announced last quarter; the 10-Q filing's government-grant footnote will show the obligated total.
- Dollar commitments under nuclear fuel enrichment contracts: still undisclosed; the commitments footnote in the 10-Q or annual 10-K filing will show the size of minimum purchase obligations.
💲 Other KPIs
X-energy ended September with $1.81 billion in cash and marketable securities and zero debt, down $94.3 million from $1.90 billion at the end of June by our math. In the third quarter, the reactor developer used $51.2 million in operating cash and spent $44.1 million on facilities net of government grant reimbursements, partially offset by $19.7 million of interest income.
Unbilled receivables and contract assets — revenue X-energy has earned for engineering work but has not yet billed to the government or customers — rose 14.3% from $75.4 million in June and more than doubled from $41.5 million at year-end 2025. Combined with $51.4 million in billed accounts receivable, working capital tied up in receivables absorbed $38.6 million of cash over the first nine months.
Management's diluted share count — which adds 108.7 million Class B founder units and 14.9 million options and restricted stock units to the 283.5 million public Class A shares — edged down 1.7% from 414.2 million in the second quarter. This figure still excludes a customer warrant for 14.1 million shares that vests upon future project milestones.
🔮 Guidance
Unchanged. British regulators accepted the Xe-100 reactor into the design review process, which X-energy expects to take about three years. The review covers X-energy and Centrica's plan to deploy up to 6 gigawatts in the United Kingdom and will reuse safety analyses already reviewed by US regulators.
Unchanged. After finishing the outer building shell on schedule in the third quarter, the Oak Ridge fuel plant moved into interior construction and equipment installation. Once running, the plant is planned to produce 700,000 fuel pebbles a year, enough to supply up to 11 Xe-100 reactors.
❓ Key Questions
What will the first Texas reactor plant cost in total?
Now that X-energy holds the construction permit for Dow's Long Mott site, what is the total construction budget, and how will X-energy and Dow split the private 50% cost share outside the Department of Energy's contribution?
Has the Department of Energy obligated the extra $1 billion?
Last quarter management noted an increase of up to $1 billion in its federal cost-share agreement. How much of that additional funding has the government formally obligated into the contract as of today?
Why did long-term deferred revenue fall this quarter?
Total long-term deferred revenue dropped from $30.3 million in June to $26.1 million in September, led by a $4.2 million decline in related-party balances. Which customer contract drove that drawdown, and when will the AEP agreement add cash?
How much spending is ineligible for federal reimbursement?
Selling, general and administrative expenses included $8.5 million for corporate projects like TX-2 design this quarter. What is the expected quarterly spending run-rate on TX-2 and other projects that receive zero federal cost-share?