Terrestrial Energy Inc. /DE/
For the period ended Dec 31, 2025. Filed Mar 30, 2026.
View on SEC.govAbout this filing
A company's yearly report to the SEC, with audited financial statements. It is the fullest account a company gives of its business, its finances and the risks it sees.
FY2025 · Filed Mar 30, 2026
What changed in Risk Factors?
Read the current filingPrevious report: 10-K
Period ended 2024-12-31; filed 2025-03-31.
0001213900-25-026419
Item 1A. Risk FactorsCurrent report: 10-K
Period ended 2025-12-31; filed 2026-03-30.
0001104659-26-036846
Item 1A. Risk FactorsThe baseline is this issuer’s latest earlier reporting period of the same form that was filed before the current report. A previous 10-Q is a different quarter, not a year-over-year comparison. Amendments are excluded.
Compared 3 previous paragraphs and 202 current paragraphs.
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Tables are not compared: 8 previous and 65 current tables excluded. Dates, whitespace, punctuation and numbering changes are ignored; changes to financial figures remain significant.
A changed paragraph is not evidence that risk increased or decreased. An unchanged paragraph does not establish that risk stayed the same.
Added paragraphs (201)
Current report
An investment in our securities involves a high degree of risk. You should consider carefully the risks and uncertainties described below, together with all of the other information contained in this Annual Report on Form 10-K, before deciding to invest in our securities. If any of the following events occur, our business, financial condition and operating results may be materially adversely affected. In that event, the trading price of our securities could decline, and you could lose all or part of your investment. References to past events are provided by way of example only and are not intended to be a complete listing or a representation as to whether or not such factors have occurred in the past or their likelihood of occurring in the future. The risks and uncertainties described below are not the only ones we face. Additional risks and uncertainties that we are unaware of, or that we currently believe are not material, may also become important factors that adversely affect our business or results of operations.
Current report
We have not yet constructed an IMSR Plant, nor have we entered into any binding contract with any customer, including any of our current portfolio of project consortium partners, to operate an IMSR Plant or deliver electricity or heat, and there is no guarantee that we will be able to do so in the future. Our limited commercial operating history makes it difficult to evaluate our prospects, the risks and challenges we may encounter and our total potential addressable market.
Current report
Our business plan includes entering into arrangements with customers, which we also refer to as project consortium partners (including builder-operators, offtake customers, suppliers as well as public and private project investors), who will construct and operate IMSR Plants. Our ability to execute on our business plan will be subject to reaching binding agreements with potential customers for electricity or heat delivered by our IMSR Plant. If no potential near-term customer enters into such binding agreements, our planned construction and operation of our IMSR Plants could be significantly delayed. Such delays would result in delays in revenue and could hinder our ability to gain market traction with other potential customers. This could have a material adverse effect on our business and financial condition. To date, we have entered into contingent non-binding letters of intent to cooperate with potential customers to identify sites and land-use requirements for IMSR Plant licensing and construction, which may not result in binding agreements for the purchase of our products or** **services. We have been selected to site an IMSR Plant at the Texas A&M-RELLIS campus, subject to successful site characterization studies, governing body approvals and regulatory approvals. As a result of our limited commercial operating history and ongoing changes in our new and evolving industry, including evolving demand for our products and services and the potential development of technologies that may prove more efficient or effective for our intended use cases, our ability to forecast our future results of operations and plan for and model future growth is limited and subject to a number of uncertainties. Therefore, there can be no assurance that our internal estimates relating to the size of our serviceable addressable market will be correct. In addition, our expectations with respect to our serviceable addressable market may differ from those of third parties, including investors or securities analysts.
Current report
Any delays in the development and construction of our IMSR plants and the manufacturing of their key components due to a number of factors, including the degree of pre-fabrication, standardization, on-site construction, long-lead procurement, contractor performance, plant pre-operational and startup testing and other site-specific considerations may adversely impact our business and financial condition.
Current report
The success of our business will depend in large part on our ability to successfully deliver the IMSR plant to customers on-time and on-budget at specified performance levels. There is no guarantee that our planned deployments of the IMSR plant will be successful, timely, or on budget. There can be no assurance that we will not experience operational or process failures and other problems during our first commercial deployment or any planned deployment thereafter.
Current report
In the future, we may experience delays, cost overruns or other complications in the design, manufacture, production and delivery of the IMSR plant and its key components, such as the IMSR Core-unit and IMSR Fuel Salt, that could prevent us from delivering IMSR plants in 2034 or beyond. We have not updated third-party cost estimates related to building our IMSR plants since 2021 and the cost environment may have adversely changed since such preliminary third-party cost estimates were obtained. Such third-party cost estimates may be significantly higher than our current estimates, which affect the marketability, capital and operational costs of our IMSR plants and our expectations with respect to our business plan and future profitability. The effect of such complications may be increased as a result of rising commodity prices and interest rates, which may increase costs to us and to our customers and may adversely affect the competitiveness of our IMSR plants compared to more established, competing means of supplying electricity or heat. If delays like this occur, we could experience issues or delays in sustaining or further increasing production and sales of IMSR plants. Similarly, we do not yet have binding commitments with any customers for the purchase of our IMSR Core-unit or IMSR Fuel Salt, and if we are unable to competitively price these components as a result of increased costs or delays in their production or otherwise, we may not realize the expected revenues associated with supplying our IMSR Plant to our customers, or our customers may need to rely on third-parties to provide components and fuel for their IMSR plants.
Current report
If we encounter difficulties in scaling our production and delivery capabilities, if we fail to develop and successfully commercialize our IMSR plants and related technologies, if we fail to timely develop such technologies before our competitors or if such technologies fail to perform as expected, are inferior to those of our competitors or are perceived as less safe or less efficient than those of our competitors, our business and financial condition could be materially and adversely impacted.
Current report
Our limited commercial operating history in a rapidly evolving industry makes it difficult for us to evaluate our future prospects and prepare for the risks and challenges we may encounter.
Current report
We have a limited commercial operating history in a rapidly evolving industry. The markets for nuclear reactor design, nuclear reactor production, nuclear fuel design, nuclear fuel supply, and services related to any or all of the foregoing business may not continue to develop in a manner that we expect or that otherwise would be favorable to our business. As a result of our limited operating history and ongoing changes in our new and evolving industry, including evolving demand for our products and services and the potential development of technologies that may prove more efficient or effective for our intended use cases, our ability to forecast our future results of operations and plan for and model future growth is limited and subject to a number of uncertainties. We have encountered and expect to continue to encounter risks and uncertainties frequently experienced by growing companies in rapidly evolving industries, such as the risks and uncertainties described in this annual report. Accordingly, should we provide forecasts in the future, we may be unable to prepare accurate internal financial forecasts or replace anticipated revenue that we do not receive as a result of delays, changed circumstances, or changed market conditions arising from these factors, and our results of operations in future reporting periods may be below the expectations of investors or analysts. If we do not address these risks successfully, our results of operations could differ materially from our estimates and forecasts or the expectations of investors or analysts, causing our business to suffer and our common stock price to decline.
Current report
If we fail to manage our growth effectively, we may be unable to execute our business plan, and our business, results of operations, and financial condition could be harmed.
Current report
In order to achieve the future revenue growth anticipated, we must finalize our IMSR Plant design, receive regulatory approvals, including the USNRC and other regulatory bodies licensing our IMSR Plants, design, construct and license facilities to manufacture and produce IMSR Core-units and IMSR Fuel Salt, and continue to develop and market new products and services to traditional and non-traditional end-users. If our operations grow as planned, we intend to expand our operations significantly to meet anticipated demand. To properly manage our growth, we will need to hire and retain additional personnel, upgrade our existing operational management and financial and reporting systems, and improve our business processes and controls. Our future expansion will include:
Current report
If our operations continue to grow as planned, of which there can be no assurance, we will need to expand our sales and marketing, research and development, customer and commercial strategy, permitting and licensing, products and services, manufacturing, supply, and operations functions. These efforts will require us to invest significant financial and other resources, including in industries and sales channels in which we have limited experience to date. We will also need to continue to leverage our manufacturing and operational systems and processes, and there is no guarantee that we will be able to scale the business as currently planned or within the planned timeframe. The continued expansion of our business may also require additional manufacturing and operational facilities, as well as space for administrative support, and there is no guarantee that we will be able to find suitable locations for such facilities.
Current report
Our continued growth could increase the strain on our resources, and we could experience operating difficulties, including difficulties in hiring and training employees, finding manufacturing capacity to produce our IMSR Plants and related equipment, delays in production, finding suitable locations or partners for our IMSR plants, challenges in scaling-up IMSR Fuel Salt and IMSR Core-unit production capacity and supply, and difficulty sourcing adequate raw materials for our IMSR Plants. These difficulties may divert the attention of management and key employees and impact financial and operational results. If we are unable to drive commensurate growth, these costs, which include lease commitments, headcount and capital assets, could result in decreased margins, which could have a material adverse effect on our business, financial condition and results of operations.
Current report
IMSR Plants may suffer significant construction delays or cost increases as a result of a variety of factors. Any such delays could cause the construction of a project to ultimately be unprofitable for the Company or otherwise adversely affect the Company’s business, financial condition and results of operations.
Current report
Our IMSR Plant design development will be actively managed through design reviews, prototyping of key systems, involvement of external partners and application of industry lessons, but we could still fail to identify latent manufacturing and construction issues early enough to avoid negative effects on construction or ultimate performance of our IMSR Plants.
Current report
While the Company anticipates improved cost efficiency as it gains further experience in delivering IMSR Plants, there may be delays or unexpected developments at such later stages of completing projects, which could cause construction costs to exceed the Company’s expectations as a result of a variety of factors, including but not limited to:
Current report
Any failure to effectively update the design, construction, and operations of our planned IMSR Plants to ensure cost competitiveness could reduce the marketability of our designs and has the potential to impact deployment schedules.
Current report
Updating our designs, construction models, and operation models will be necessary to be competitive and attractive in the market, particularly in the United States where the price of power is generally lower than in certain other key markets. If we are not able to achieve and maintain cost-competitiveness of our IMSR Fuel Salt or our planned IMSR Plants in the United States or elsewhere, our business could be materially and adversely affected.
Current report
Successful commercialization of new, or further enhancements to existing, alternative low-carbon energy generation technologies, such as adding carbon capture and sequestration/storage mechanisms to fossil fuel power plants, wind, solar, geothermal or fusion, may prove to be more cost effective or appealing to the global energy markets and therefore may adversely affect the market demand for our IMSR Plants, potentially adversely affecting our ability to successfully commercialize our IMSR Plants.
Current report
The expected market for our IMSR Plant generating electric power and high-temperature heat may be superseded or rendered obsolete by new technology or the novel application of existing technologies. Our estimates for the serviceable addressable market and our expectations, inclusive of recent updates, with regards to certain unit economics are based on a number of internal and third-party estimates, including our potential contracted revenue, the number of potential customers who have expressed interest in our IMSR Plant, assumed prices and production and regulatory costs for our IMSR Plant, our ability to leverage our current logistical and operational processes, assumptions regarding our technology and general market conditions. However, our assumptions and the data underlying our estimates may not be correct and the conditions supporting our assumptions or estimates may change at any time, reducing the predictive accuracy of these underlying factors. As a result, our expected performance, our estimates of the serviceable addressable market for our products and services, as well as the expected growth rate for the serviceable addressable market for our products and services, may prove to be incorrect. Any material change to our assumptions or expectations with respect to the foregoing may have a material adverse effect on our business prospects, financial condition, results of operations and cash flows and could harm our reputation.
Current report
If demand for our IMSR Plants fails to develop sufficiently, our business and operations could suffer, and we would be unable to achieve or maintain profitability.
Current report
The viability and continued growth in demand for new nuclear technologies, and in turn, our IMSR Plant, may be impacted by many factors outside of our control, including:
Current report
Reduction in energy demand or changes in climate-related policies may change market conditions, reducing our product’s competitiveness and affecting our performance. If demand does not grow, our business and operations could suffer, which would have an adverse impact on our ability to grow our business and we could be unable to achieve or maintain profitability.
Current report
Our IMSR Plant design may not attract customers as quickly as we expect, or at all.
Current report
IMSR and other advanced nuclear technologies are relatively new and unproven and may be more costly than alternatives. Accordingly, adoption of our technology, IMSR Plants or advanced nuclear technologies generally, among our potential customers may progress more slowly than we anticipate, or it may be more expensive to bring potential customers into our pipeline. Any delay or failure to sell IMSR Plants to our customers may have a material and adverse impact on our business and financial condition.
Current report
Customers may rescind or back out of non-binding agreements due to various reasons, which could adversely affect our revenue streams, project timelines, and overall financial performance.
Current report
We have entered into and may enter into additional non-binding agreements, such as a memorandum of understanding or a letter of interest with customers for the purchase of power or to collaborate on projects. These memoranda of understanding and letters of interest are non-binding and the underlying contracts may not come to fruition as a result of, among other things, changes in business priorities, financial constraints, regulatory changes, force majeure events, failure to obtain necessary approvals, or failure to meet contractual obligations by either party. The termination of these agreements could adversely affect our business. For example, while we expect to enter into agreements with the Texas A&M University System to construct an IMSR Plant at the Texas A&M-RELLIS campus site in accordance with our December 2024 MOU, no assurances can be given as to whether or when we may be able to do so. Additionally, loss of planned customers or projects may negatively impact our reputation and future business prospects.
Current report
Our cost estimates are sensitive to broader economic factors, and our ability to control or manage our costs may be limited**.**
Current report
Capital and operating costs for the deployment of our first commercial IMSR Plant may be difficult to project, are inherently variable and are subject to significant change based on a variety of factors, including site specific factors, customer off-take requirements, regulatory oversight, operating agreements, supply chain availability, inflation, cost escalations for first-of-a-kind technologies and other factors. Opportunities for cost reductions with subsequent deployments are similarly uncertain. To the extent cost reductions are not achieved within the expected timeframe or magnitude, the IMSR Plant may not be cost competitive with alternative technologies, which could materially and adversely affect our expected revenues, gross margins and unit economics and levelized cost expectations.
Current report
Competition from existing or new competitors or technologies domestically and internationally could cause us to experience one or more of downward pressures on prices, lower customer demand for our products and services, reduced margins, the inability to take advantage of new business opportunities and the loss of market share**.**
Current report
We operate in highly competitive markets and are subject to competition based upon product design, performance, technology, pricing, quality, and services, from competing nuclear suppliers as well as from alternative means of producing electricity and/or heat. There are a number of advanced reactor designs, and advanced reactor projects, under development in the United States. Many of these designs are involved in pre-application review with the USNRC. Our advanced design, projected product design performance, engineering expertise, and quality control have been important factors in our growth; nonetheless other companies providing competing technologies could capture customers or market share from us, which could have a material adverse effect on our business or financial condition.
Current report
Moreover, our competitors may develop or adopt technologies that are superior, more efficient, more effective, and/or more attractive to prospective customers compared to our technologies (on a price-to-value basis, operational impact, or otherwise), or may adapt more quickly to leverage new or emerging technologies or meet new or evolving regulatory requirements in our target markets. We will need to anticipate and respond to these changes by enhancing our offerings and/or internal processes in order to maintain our competitive position, but we may not be successful in doing so. In such scenarios, the Company may not be able to commercialize the IMSR Plant.
Current report
For sales and/or deployments outside of jurisdictions with highly-developed nuclear regulatory frameworks, some of our foreign competitors currently benefit from, and others may benefit in the future from, permissive regulatory and licensing regimes and/or from protective measures by their home countries where governments are providing financial support, including significant investments in the development of new technologies. Those competitors may have a competitive advantage if they are able to obtain approvals, or if they can demonstrate to potential customers the value and benefits of their products and services, particularly in jurisdictions that have less stringent nuclear regulatory requirements. These competitors may have access to greater sources of funding to develop and commercialize their products than we do, whether as a result of potential competitive advantages or from supportive national governments, and may be able to substantially discount sales costs of nuclear plants in their respective markets. This market environment may result in increased pressures on our pricing and other competitive factors.
Current report
Substantial governmental support for competing technologies or their fuel supply may reduce our competitive advantages.
Current report
The U.S. government has announced initiatives to support a variety of Generation IV SMR technologies, including our technology and competing technologies. Among other programs, the U.S. Department of Energy has announced programs designed to support the creation of a U.S. supply chain for HALEU. Should the Federal Government seek to preferentially support competing nuclear technologies, we may experience a loss in competitive position in our sector. For example, should the U.S. government provide the substantial funding we believe would be necessary to establish a domestic HALEU supply chain at commercial scale, then the competitive advantage of our choice of SALEU as a fuel for the IMSR Plant would be reduced.
Current report
Changes in the availability and cost of electricity, natural gas, oil and other forms of energy are subject to volatile market conditions that could adversely affect our business prospects, financial condition, results of operations and cash flows.
Current report
The prices for and availability of electricity, natural gas, oil and other energy resources are subject to volatile market conditions. We do not control these market conditions, which are, moreover, often affected by political and economic factors beyond our control. Decreases in energy prices, or changes in nuclear energy costs relative to other forms of energy, may adversely affect our business. To the extent that these uncertainties cause suppliers and customers to be more cost sensitive or to adjust their business plans and operations, decreased energy prices may have an adverse effect on our business prospects, financial condition results of operations and cash flow.
Current report
The potential disruption of uranium supply chains makes long-range planning uncertain.
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Removed paragraphs (2)
Previous report
As a smaller reporting company under Rule 12b-2 of the Exchange Act, we are not required to include risk factors in this Report. However, the following is a partial list of material risks, uncertainties and other factors that could have a material effect on us and our operations:
Previous report
For additional risks relating to our operations, other than as set forth above, see the section titled “Risk Factors” contained in our IPO Registration Statement. Any of these factors could result in a significant or material adverse effect on our results of operations or financial condition. Additional risks could arise that may also affect our business or ability to consummate an initial business combination. We may disclose changes to such risk factors or disclose additional risk factors from time to time in our future filings with the SEC.