X-energy Reports First Quarter 2026 Results

ROCKVILLE, Md., June 4, 2026 – X-Energy, Inc. (NASDAQ: XE) (“X-energy” or the “Company”), a leading designer of advanced nuclear reactor technology and manufacturer of nuclear fuels, today announced first quarter 2026 financial results for X-Energy Reactor Company, LLC, the predecessor company to X-Energy, Inc., and operational highlights.

“Our first earnings announcement as a public company marks an important moment for X-energy and reflects the progress we are making to commercialize advanced nuclear technology at scale,” said J. Clay Sell, CEO of X-energy. “During the first quarter of 2026, we remained focused on advancing the development of the Xe-100 and TRISO-X fuel, while continuing to strengthen the regulatory and commercial foundation needed to support long-term deployment.”

“This quarter’s regulatory achievements reflect the strength of X-energy’s long-term approach to licensing and regulatory engagement,” Sell continued. “As the industry works to bring advanced nuclear technologies to market, we believe our ability to achieve first-of-their-kind regulatory approvals helps to establish a stronger foundation for the future commercialization and deployment of advanced nuclear at scale. At the same time, we continued strengthening the commercial foundation of the business through strategic supply chain partnerships, preliminary agreements with domestic utilities, and continued construction of our TX-1 fuel facility in Tennessee.”

Daniel Gross, CFO of X-energy added, “Our recent IPO enhanced X-energy’s liquidity profile, providing approximately $1.1 billion dollars in net proceeds of additional capital as we work on bringing advanced nuclear technologies to market. Supported by our industry-leading customer base, our IPO further bolsters our leadership in SMR deployment and commercialization.”

Operational Highlights

Coordination with the NRC for review of a construction permit application for a proposed advanced nuclear project at The Dow Chemical Company’s UCC Seadrift, Texas site is ongoing. Dow and X-energy’s Construction Permit Application for the proposed advanced nuclear project in Seadrift, Texas, achieved a historic milestone as the first commercial reactor to receive environmental clearance through an Environmental Assessment instead of a years-long Environmental Impact Statement. Following a comprehensive independent analysis, the NRC completed its assessment ahead of schedule and issued a FONSI.

1Q 2026 Financial Results

Total Revenues and Grant Income in the three months ended March 31, 2026 were $43.4 million, including $39.9 million of Services Revenue and $3.5 million of Grant Income. Total Revenues and Grant Income increased 109% compared to the three months ended March 31, 2025 primarily due to a $21.6 million increase in revenue and grant income from the

ARDP Agreement with the Department of Energy (“DOE”). This was driven by an increase in activities and nature of services performed.

Total Operating Expenses in the three months ended March 31, 2026 were $109.5 million, including $65.4 million of Direct Costs. Total Operating Expenses increased 133% compared to the three months ended March 31, 2025 primarily due to an increase of $36.6 million in Direct Costs and an increase of $26.1 million in Selling, General, and Administrative expenses. The increase in Direct Costs was driven by increases of $12.0 million and $11.7 million in subcontracting costs and direct materials, respectively, which were driven by an increase in activity related to the ARDP Agreement, and an increase of $11.4 million in direct labor costs which was driven by an increase in employee headcount to support activity under the ARDP Agreement. The increase in Selling, General, and Administrative expenses was primarily due to an $8.7 million increase in payroll-related costs due primarily to increases in employee headcount and a $3.1 million increase in unit-based compensation expense due to new grants made during the year ended December 31, 2025. Selling, General and Administrative expenses further increased by $6.1 million due to contractor costs related to corporate projects and a $5.2 million increase in professional fees and enterprise software costs for general corporate use.

Net Cash Used in Operating Activities in the three months ended March 31, 2026 was $67.3 million, a 61% increase compared to the three months ended March 31, 2025, primarily due to an increase in activity on the ARDP Agreement, an increase in corporate headcount, and an increase in enterprise software costs and corporate contractors.

Net Cash Used in Investing Activities in the three months ended March 31, 2026 was $166.0 million, reflecting $43.0 million of capital expenditures and $28.8 million of reimbursements for capital expenditures received from the DOE under the ARDP. The increase in Net Cash Used in Investing Activities compared to the three months ended March 31, 2025 was primarily due to purchases of investments of $189.9 million, and a $31.7 million increase in capital expenditures related to the construction of facilities, including TX-1. These increases in cash outflows were partially offset by a $38.1 million increase in proceeds from investment maturities and a $19.3 million increase in reimbursements received during the period for capital expenditures qualifying under government grant programs compared to the three months ended March 31, 2025.

1Q 2026 Liquidity

Cash and Cash Equivalents totaled $224.1 million as of March 31, 2026. Short-term investments totaled $449.5 million and Long-term investments totaled $270.4 million, for total liquidity of $944.0 million as of March 31, 2026. The Company had no debt outstanding as of March 31, 2026 and December 31, 2025. Additionally, on April 24, 2026, the Company began trading on Nasdaq under the ticker “XE” and on April 27, 2026, the Company settled its IPO, raising approximately $1.1 billion in net proceeds.

Project Pipeline

As of March 31, 2026, the Company’s project pipeline consisted of 144 reactors across the U.S. and U.K. for approximately 11.5 gigawatts electric, assuming each customer exercises its contingent rights in full. X-energy’s three high-quality customers, Dow, Amazon, and Centrica, are expected to underpin the deployment of the initial fleets of Xe-100 reactors.

Conference Call

X-energy will host a conference call today at 8:00 a.m. ET to discuss the results. A live audio webcast of the conference call can be accessed on the Investor Relations page of the Company's website by visiting https://investors.x-energy.com, along with the Company's presentation materials. A replay of the webcast will be available on the website for at least 30 days following the event.

About X-energy

X-energy is a leading designer of advanced small modular nuclear reactors (“SMR”) and fuel technology developed to establish a new standard in clean, safe, reliable energy. X-energy's intrinsically safe Xe-100 high-temperature gas-cooled reactor and TRISO-X particle fuel expand applications for nuclear technology, with commercial projects across grid, industrial, and AI. Together, X-energy's technology drives enhanced safety, lower cost, faster construction timelines, and scalable deployment when compared with other SMRs and conventional nuclear. For more information, visit X-energy.com or connect with us on X or LinkedIn.

Contacts

Investor Relations

Patricia Gil

+1 301.558.3040

investors@x-energy.com

Media

Robert McEntyre

+1 240.673.6565

media@x-energy.com

Forward-Looking Statements

This press release contains forward-looking statements within the meaning of the Private Securities Litigation Reform Act of 1995. We intend such forward-looking statements to be covered by the safe harbor provisions for forward-looking statements contained in Section 27A of the Securities Act of 1933, as amended (the “Securities Act”), and Section 21E of the Securities Exchange Act of 1934, as amended. Such statements can be identified by the fact they do not relate strictly to historical or current facts. Words such as “assume,” “believe,” “continue,” “could,” “estimate,” “expect,” “intend,” “may,” “plan,” “potential,” “predict,” “project,” “future,” “will,” “seek,” “foreseeable,” the negative version of these words, or similar terms and phrases may identify forward-looking statements, but the absence of these words does not mean that a statement is not forward-looking. These forward-looking statements include, but are not limited to, statements relating to our strategic and operational plans, including completion of construction for our initial fuel fabrication facility, our ability to receive regulatory approvals and on accelerated timeframes, expected project deployment timeline, the ability of our initial collaborations to turn into customers, expected use of IPO proceeds, the success of our supply chain partnerships, future growth, and the outlook of our business.

These forward-looking statements are neither promises nor guarantees and are subject to a number of risks, uncertainties, and assumptions. Actual results may differ materially as a result of a number of factors, including, without limitation, our ability to achieve final investment decisions from our customers; our ability to realize our plans to deliver a commercial Xe-100; our projects may be subject to delays or setbacks; our liquidity and ability to raise capital; changes or delays in support from the U.S. government, including ARDP; changes, delays, or an inability to receive licenses or other governmental approvals necessary for our reactors and fuel facilities; uncertainty and changes in our expected costs, schedules and unit economics due to inflation, supply chain constraints (including our customers' access to HALEU and certain other materials), labor availability, site-specific factors and first-of-a-kind risks; our limited operating experience at intended scale and the possibility that latent design or operational issues may emerge; our reliance on a limited number of specialized suppliers and exposure to supply disruptions, quality issues, and trade policy changes; safety, security, and cybersecurity incidents; the nascent and uncertain market adoption of SMRs and the possibility that demand may grow more slowly than expected or customers may defer or cancel projects; competition from competitors with potentially greater resources or lower costs; our reliance on key partners and customers and the risk that changes in partner priorities or timelines could materially affect commercialization; customer contractual terms that may constrain capacity allocation and compress margins; our fuel business dependence on licensing and scaling fuel fabrication facilities and the risk of delays in NRC licensing or facility construction; changes in laws, regulations, incentives, energy market rules, export controls, or government policies; shifts in public perception and political support for nuclear energy; our dependence on key personnel and ability to hire and retain talent; and our ability to obtain, maintain, or enforce IP rights. The foregoing list of factors is not exhaustive. Additional information concerning these and other factors can be found in the section entitled “Risk Factors” in our prospectus dated April 23, 2026, filed with Securities and Exchange Commission ("SEC")

on April 27, 2026, and in subsequent filings we make with the SEC. Additional information will also be set forth in our Quarterly Report on Form 10-Q for the quarter ended March 31, 2026.

Caution must be exercised in relying on these and other forward-looking statements. Due to known and unknown risks, our results may differ materially from our expectations and projections. Any forward-looking statements made herein speak only as of the date of this press release, and you should not rely on forward-looking statements as predictions of future events. Although we believe that the expectations reflected in the forward-looking statements are reasonable, we cannot guarantee that the future results, performance or achievements reflected in the forward-looking statements will be achieved or will occur. Except as required by law, X-energy does not undertake any obligation to update or revise any forward-looking statement, whether as a result of new information, future events or otherwise.

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