Deep Isolation Stands Ready to Support States in Developing a Comprehensive, End-to-end Nuclear Fuel Cycle Strategy

BERKELEY, CA – Deep Isolation Nuclear, Inc. (OTCQB: DBHL) (“Deep Isolation” or the “Company”), a leading innovator in nuclear waste disposal technology, today welcomed the U.S. Department of Energy’s (DOE) announcement advancing the Nuclear Lifecycle Innovation Campus initiative, a new effort to modernize the nation’s nuclear fuel cycle, strengthen domestic energy security and support the continued development of advanced nuclear energy. 

Through the Innovation Campus initiative, DOE is establishing voluntary State-Federal partnerships with states interested in exploring the potential development of regional campuses supporting activities across the nuclear fuel lifecycle, including ultimate disposition of used nuclear fuel.

“The Nuclear Lifecycle Innovation Campus initiative is a game-changing opportunity to secure America’s nuclear energy future,” said Rod Baltzer, President and Chief Executive Officer of Deep Isolation. “As new reactors are deployed and domestic nuclear capabilities expand, it is imperative to also deliver safe, secure and permanent disposal of used nuclear fuel and other radioactive waste – and the Campus initiative rightly establishes that stewardship as the centerpiece of these vital new State-Federal partnerships.”

Deep Isolation stands ready to work with DOE, state governments, local communities, industry partners and other stakeholders as states evaluate the opportunity to host Nuclear Lifecycle Innovation Campuses. The Company’s patented deep borehole disposal technology is particularly well suited to the campus model due to its modularity, scalability and adaptability to a very wide range of geologic settings. It supports disposal of used nuclear fuel from the United States’ legacy fleet of light water reactors, from advanced reactor designs, and also of the highly radioactive residues that remain after recycling of the used nuclear fuel. Disposal capacity can be developed in phases as needed, allowing states to incorporate a permanent waste solution into their broader nuclear development plans from the outset.

Deep Isolation’s technical, regulatory and stakeholder engagement expertise can also help states evaluate their options and integrate responsible waste management and disposal planning into the earliest stages of campus development.

“Communities and states considering a role in the future nuclear fuel cycle should have confidence that the backend can be addressed safely and responsibly,” Baltzer added. “Deep Isolation looks forward to supporting all interested states as they create economic opportunity, strengthen national energy security and ensure that nuclear waste is managed safely for generations to come.”

About Nuclear Lifecycle Innovation Campuses

Nuclear Lifecycle Innovation Campuses are a new effort to modernize the nation’s full nuclear fuel cycle by co-locating functions such as fuel fabrication, enrichment, reprocessing used nuclear fuel, and disposition of waste. Innovation Campuses will be established through voluntary federal-state partnerships designed to advance manufacturing and regional economic growth, enhance national energy security and build a coherent end-to-end nuclear strategy for the country.

About Deep Isolation

Deep Isolation (OTCQB: DBHL) is the first company to undertake development of technologies for nuclear waste disposal in deep boreholes. When commercialized, Deep Isolation’s solution will offer a unique approach to help countries identify, plan for and complete the necessary steps to dispose of their nuclear waste inventories. With over 100 patents issued to date, Deep Isolation’s technology is being designed to leverage proven drilling practices to allow safe isolation of waste deep underground in horizontal, vertical, or slanted borehole repositories. Deep Isolation’s Universal Canister System was developed through a three-year project funded by the U.S. Department of Energy’s Advanced Research Projects Agency–Energy and is engineered to support integrated management of spent fuel and high-level radioactive waste from legacy and advanced reactors across storage, transportation, and eventual disposal.  In January 2026, Deep Isolation launched a full-scale, at-depth deep borehole Commercialization Pilot for its solution at Cameron, Texas, in collaboration with the Deep Borehole Demonstration Center, Halliburton (NYSE: HAL), Amentum (NYSE: AMTM), NAC International, and Occlusion Nuclear Solutions.

For more information, visit: deepisolation.com. 

###

Media Contact:
Sophie McCallum
media@deepisolation.com

Investor Contact:
Caldwell Bailey
InvestorRelations@deepisolation.com

Forward-Looking Statements

Statements contained in this news release that are not historical facts are “forward-looking information” or “forward-looking statements” (collectively, “forward-looking statements”) within the meaning of Section 27A of the Securities Act and Section 21E of the Securities Exchange Act of 1934, as amended. Forward-looking statements include, but are not limited to, statements regarding our plans, objectives and expectations for our business, the future growth of our business and the nuclear energy and nuclear waste disposal industries as a whole, and future benefits expected to arise from our strategic partnerships. In certain cases, forward-looking statements can be identified by the use of words and phrases or variations of words and phrases or statements such as “may,” “should,” “expect,” “intend,” “plan,” “anticipate,” “believe,” “estimate,” “predict,” “will,” “could,” “project,” “target,” “potential,” “continue” and similar expressions. Forward-looking statements are based on management’s belief and assumptions, including current expectations and projections about future events and trends, and on information currently available to management.

Forward-looking statements in this or any other news release are subject to a number of risks, uncertainties, and assumptions that could cause actual results to be materially different from those expressed or implied by such forward-looking statements. Such risks, uncertainties, and assumptions are subject to a number of factors, including, among others: the failure of a market to develop for our deep borehole disposal solutions as quickly as we expect or at all; a failure of demand for our solution to develop sufficiently; regulatory and legal developments, including issues relating to obtaining regulatory approvals or permissions on the timelines we expect or at all; our lack of profitability; delays or failure in our initiative to complete a full-scale, at-depth demonstration of our Universal Canister System and our deep borehole solution; our failure to enter into contracts with customers or, once we do enter into contracts, to continue such contractual relationships or to receive new contract awards; our dependency on governmental contracts and awards and our ability to finalize negotiations on same; our failure to manage our growth effectively or to execute our business plan; our failure to sustain and expand relationships with governmental entities and strategic partners; a failure in the assumptions or analyses we have used in supporting forecasts or plans; our inability to commercialize our products at scale; the development or deployment of other technologies or solutions supplanting or competing with our technologies; challenges to our intellectual property; failures to protect, maintain, enforce, and enhance our intellectual property, and claims by others of intellectual property infringement; political and public perceptions of nuclear energy, including perceptions as to accidents or other high-profile events involving nuclear power facilities or radioactive materials; our liquidity and ability to raise capital; any inability to control operating and project costs and project delays or other project-related problems; security (including cybersecurity) breaches or disruptions; geopolitical, macroeconomic, domestic events or crises, including supply chain disruptions and other risks and uncertainties outside of our control; weather and effects of climate change; and litigation or legal proceedings that may be brought against us.

The foregoing is not an exhaustive list of all the factors that may cause any forward-looking statements to prove inaccurate or our actual results to differ materially from our expectations and forecasts. Moreover, we operate in a highly regulated environment. New risks emerge from time to time. It is not possible for our management to predict all risks, nor can we assess the impact of all factors on our business or the extent to which any factor, or combination of factors, may cause actual results to differ materially from those contained in any forward-looking statements we may make. In light of these risks, uncertainties, and assumptions, the future events and trends discussed in this release may not occur and actual results could differ materially and adversely from those anticipated or implied in the forward-looking statements, and we cannot guarantee future results, performance, or achievements. Accordingly, readers should not place undue reliance on forward-looking statements. We undertake no obligation to update any forward-looking statements for any reason after the date of this release or to conform these statements to actual results or revised expectations, except as required by law.

Additional information concerning the factors above and other factors will be found in the Company’s public filings with the Securities and Exchange Commission (the “SEC”), including the sections titled “Forward-Looking Statements” and “Risk Factors” in the Company’s Reports on Form 10-K and 10-Q for the fiscal year ended December 31, 2025 and the quarter ending March 31, 2026, respectively, as filed with the SEC on March 30, 2026, our Form S-1, originally filed August 18, 2025 and subsequently amended, our Proxy Statement for our 2026 Annual Meeting as filed on April 29, 2026, and in filings with the SEC that will be made in the future.

The Company’s SEC filings are available free of charge at www.sec.gov or upon written request to Deep Isolation at InvestorRelations@deepisolation.com or CorpSec@deepisolation.com.

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Deep Isolation Joins Lawrence Berkeley National Laboratory and the University of South Carolina on Three DOE Project GENESIS Awards to Accelerate AI-Enabled Repository Siting, Design, and Performance Analysis for Nuclear Waste Disposal

BERKELEY, CA – Deep Isolation Nuclear, Inc. (OTCQB: DBHL) (“Deep Isolation” or the “Company”), a leading innovator in nuclear waste disposal technology, today announced that it has been selected as the sole industrial partner on three competitive federal grants awarded through the U.S. Department of Energy’s (DOE) Project GENESIS program. Two initiatives are led by Lawrence Berkeley National Laboratory (LBNL) and one is led by the University of South Carolina (USC). Together, the projects aim to advance artificial intelligence-enabled repository site screening, design and performance analysis for nuclear waste disposal.

The two LBNL-led initiatives will bring together Deep Isolation’s industry and engineering expertise in deep borehole disposal and innovative Universal Canister System (UCS) design with LBNL’s capabilities in geoscience, digital modeling and AI-driven analysis. The USC-led initiative will pair Deep Isolation’s repository engineering, borehole data and fatal flaw screening expertise with USC’s capabilities in physics-informed artificial intelligence, uncertainty analysis and autonomous subsurface modeling to support faster, more data-driven site characterization.

The projects support DOE’s Genesis Mission to accelerate scientific discovery and energy innovation through artificial intelligence by advancing technologies with the potential to reduce the time, cost and uncertainty associated with siting, designing and evaluating repositories for the permanent disposal of spent nuclear fuel and high-level radioactive waste. Read DOE Press Release: Secretary of Energy Chris Wright Announces First Genesis Mission Projects Selected to Accelerate AI-Driven Scientific Discovery.

“Developing AI tools that can meaningfully improve nuclear waste disposal requires close collaboration between researchers and industry,” said Professor Sourav Banerjee, Director of i-MAPS at the University of South Carolina. “Deep Isolation’s expertise in repository engineering and deep borehole disposal helps ensure our project framework is grounded in practical deployment requirements while advancing AI-enabled approaches that have the potential to make site characterization faster, more data-driven, and more scientifically robust.”

“These DOE awards represent an important step toward modernizing how the nuclear industry evaluates future disposal sites and repository designs,” said Jesse Sloane, Executive Vice President of Engineering at Deep Isolation. “By combining artificial intelligence with geoscience and engineering expertise, we are helping create tools that could accelerate repository development while maintaining the scientific rigor and unwavering commitment to safety required for effective and responsible long-term nuclear waste management.”

The first LBNL-led initiative, Project GeoTrace, will use AI-assisted tools to transform legacy geological records into detailed digital models for site characterization and subsurface fatal flaw analysis. The second LBNL-led project will develop an AI-driven platform using digital twins, geographic information system data and faster computer models to support repository design and performance analysis. Building on previous collaborations between Deep Isolation and LBNL, the two initiatives combine complementary expertise in repository engineering, geoscience and artificial intelligence to create a more integrated workflow spanning site characterization, repository design and performance evaluation. The USC-led initiative, AI-STRATA3D, will combine geological data, physics-based modeling and artificial intelligence to rapidly evaluate candidate sites, identify potential fatal flaws and refine predictions as new information becomes available.

Together, the projects are expected to create a more connected framework spanning initial site screening, subsurface characterization, repository design and performance analysis. As the sole industrial partner on the three initiatives, Deep Isolation will contribute borehole data, repository engineering expertise and practical screening criteria to help ensure the resulting tools reflect the technical requirements for future borehole repository development.

About the Genesis Mission

The Genesis Mission is a national initiative led by the U.S. Department of Energy and its 17 national laboratories to build an advanced scientific platform that uses artificial intelligence to accelerate discovery science, strengthen national security and drive energy innovation. The initiative brings together DOE’s supercomputers, scientific data, research facilities and emerging quantum technologies with expertise from industry and academia. Through this integrated platform and a series of national science and technology challenges, the Genesis Mission aims to increase the productivity and impact of U.S. research and development and accelerate progress on complex challenges across energy, science and national security.

About Deep Isolation

Deep Isolation (OTCQB: DBHL) is the first company to undertake development of technologies for nuclear waste disposal in deep boreholes. When commercialized, Deep Isolation’s solution will offer a unique solution to help countries identify, plan for and complete the necessary steps to dispose of their nuclear waste inventories. With over 100 patents issued to date, Deep Isolation’s technology is being designed to leverage proven drilling practices to allow safe isolation of waste deep underground in horizontal, vertical, or slanted borehole repositories. Deep Isolation’s Universal Canister System was developed through a three-year project funded by the U.S. Department of Energy’s Advanced Research Projects Agency–Energy and is engineered to support integrated management of spent fuel and high-level radioactive waste from legacy and advanced reactors across storage, transportation, and eventual disposal.  In January 2026, Deep Isolation launched a full-scale, at-depth deep borehole Commercialization Pilot for its solution at Cameron, Texas, in collaboration with the Deep Borehole Demonstration Center, Halliburton (NYSE: HAL), Amentum (NYSE: AMTM), NAC International, and Occlusion Nuclear Solutions.

For more information, visit: deepisolation.com. 

###

Media Contact:
Sophie McCallum
media@deepisolation.com

Investor Contact:
Caldwell Bailey
InvestorRelations@deepisolation.com

Forward-Looking Statements

Statements contained in this news release that are not historical facts are “forward-looking information” or “forward-looking statements” (collectively, “forward-looking statements”) within the meaning of Section 27A of the Securities Act and Section 21E of the Securities Exchange Act of 1934, as amended. Forward-looking statements include, but are not limited to, statements regarding our plans, objectives and expectations for our business, the future growth of our business and the nuclear energy and nuclear waste disposal industries as a whole, and future benefits expected to arise from our strategic partnerships. In certain cases, forward-looking statements can be identified by the use of words and phrases or variations of words and phrases or statements such as “may,” “should,” “expect,” “intend,” “plan,” “anticipate,” “believe,” “estimate,” “predict,” “will,” “could,” “project,” “target,” “potential,” “continue” and similar expressions. Forward-looking statements are based on management’s belief and assumptions, including current expectations and projections about future events and trends, and on information currently available to management.

Forward-looking statements in this or any other news release are subject to a number of risks, uncertainties, and assumptions that could cause actual results to be materially different from those expressed or implied by such forward-looking statements. Such risks, uncertainties, and assumptions are subject to a number of factors, including, among others: the failure of a market to develop for our deep borehole disposal solutions as quickly as we expect or at all; a failure of demand for our solution to develop sufficiently; regulatory and legal developments, including issues relating to obtaining regulatory approvals or permissions on the timelines we expect or at all; our lack of profitability; delays or failure in our initiative to complete a full-scale, at-depth demonstration of our Universal Canister System and our deep borehole solution; our failure to enter into contracts with customers or, once we do enter into contracts, to continue such contractual relationships or to receive new contract awards; our dependency on governmental contracts and awards and our ability to finalize negotiations on same; our failure to manage our growth effectively or to execute our business plan; our failure to sustain and expand relationships with governmental entities and strategic partners; a failure in the assumptions or analyses we have used in supporting forecasts or plans; our inability to commercialize our products at scale; the development or deployment of other technologies or solutions supplanting or competing with our technologies; challenges to our intellectual property; failures to protect, maintain, enforce, and enhance our intellectual property, and claims by others of intellectual property infringement; political and public perceptions of nuclear energy, including perceptions as to accidents or other high-profile events involving nuclear power facilities or radioactive materials; our liquidity and ability to raise capital; any inability to control operating and project costs and project delays or other project-related problems; security (including cybersecurity) breaches or disruptions; geopolitical, macroeconomic, domestic events or crises, including supply chain disruptions and other risks and uncertainties outside of our control; weather and effects of climate change; and litigation or legal proceedings that may be brought against us.

The foregoing is not an exhaustive list of all the factors that may cause any forward-looking statements to prove inaccurate or our actual results to differ materially from our expectations and forecasts. Moreover, we operate in a highly regulated environment. New risks emerge from time to time. It is not possible for our management to predict all risks, nor can we assess the impact of all factors on our business or the extent to which any factor, or combination of factors, may cause actual results to differ materially from those contained in any forward-looking statements we may make. In light of these risks, uncertainties, and assumptions, the future events and trends discussed in this release may not occur and actual results could differ materially and adversely from those anticipated or implied in the forward-looking statements, and we cannot guarantee future results, performance, or achievements. Accordingly, readers should not place undue reliance on forward-looking statements. We undertake no obligation to update any forward-looking statements for any reason after the date of this release or to conform these statements to actual results or revised expectations, except as required by law. Additional information concerning the factors above and other factors will be found in the Company’s public filings with the Securities and Exchange Commission (the “SEC”), including the sections titled “Forward-Looking Statements” and “Risk Factors” in the Company’s Reports on Form 10-K and 10-Q for the fiscal year ended December 31, 2025 and the quarter ending March 31, 2026, respectively, as filed with the SEC on March 30, 2026, our Form S-1, originally filed August 18, 2025 and subsequently amended, our Proxy Statement for our 2026 Annual Meeting as filed on April 29, 2026, and in filings with the SEC that will be made in the future.

The Company’s SEC filings are available free of charge at www.sec.gov or or upon written request to Deep Isolation at InvestorRelations@deepisolation.com or CorpSec@deepisolation.com.

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BERKELEY, CA – Deep Isolation Nuclear, Inc. (“Deep Isolation” or the “Company”), a leading innovator in nuclear waste disposal technology, today announced that its application for listing its common stock for trading on the OTCQB Venture Market has been approved. The Company’s common stock is now available to trade under the ticker symbol “DBHL”.

“We are excited to begin trading on the OTCQB, offering public market investors the ability to invest in our innovative nuclear waste disposal technology,” said Rod Baltzer, President & CEO of Deep Isolation. “Becoming a publicly traded company allows investors to join us in advancing proven, science-based innovation to address one of the world’s most pressing energy challenges.”

The OTCQB listing provides Deep Isolation with improved access to capital markets as the Company continues to advance the development and demonstration of its proprietary technologies based on its Universal Canister System, which addresses the need for storage, transport and disposal of reactor waste and facilitates the safe, permanent disposal of nuclear waste deep underground as a cost-effective alternative to traditional methods.

Deep Isolation’s OTCQB listing builds on a series of significant achievements in 2025, highlighted by its successful Alternative Public Offering (APO), as well as an oversubscribed $33 million private offering. Since the APO, the Company has advanced multiple strategic and technical initiatives, while benefiting from increasingly favorable market conditions in the nuclear sector. These have been driven by growing global recognition of nuclear energy’s essential role in the clean energy transition and the urgent need for permanent nuclear waste solutions.

Recent strategic and technical milestones include:

• Launch of a non-radioactive, full-scale, at-depth demonstration of the Company’s deep borehole waste disposal technology at Halliburton’s Drilling Technology Facility near Cameron, TX.
• Selection for ARPA-E’s SCALEUP Ready program to support commercial deployment of Deep Isolation’s Universal Canister System. Deep Isolation is advancing through the contracting phase for funding of up to $20 million to support its Cameron, TX demonstration project and is the first company in the nuclear industry selected to participate in the SCALEUP Ready program. The project brings together a world-class project team, including Westinghouse, NAC International (TYO: 7004), Halliburton (NYSE: HAL), Occlusion Nuclear Solutions, Amentum (NYSE: AMTM), and the Deep Borehole Demonstration Center (“the DBDC”), to demonstrate a fully integrated and permanent solution for nuclear waste disposal.
• A technology licensing agreement with Navarro Research and Engineering, Inc., and the restart of the U.S. Trade and Development Agency-funded Bulgaria feasibility study.
• New strategic collaborations with Halliburton, one of the world’s leading providers of drilling and well construction services, and with Occlusion Nuclear Solutions, a global leader in well emplacement services.
• Surpassing 100 issued patents worldwide, reinforcing Deep Isolation’s position as a leading innovator in nuclear waste disposal technology and expanding protection of its proprietary deep borehole disposal and Universal Canister System technologies.
• Completion of several key technology development and commercialization projects, which together have leveraged over $7 million of grant funding to Deep Isolation from the U.S. Department of Energy and UK government to engineer and test the world’s first Universal Canister System for storage, transport, and disposal of advanced reactor waste. Through partnerships with industry leaders such as Kairos Power, Deep Isolation has further supported evidence of the performance and technical readiness of its Universal Canister System.
• Completion of work on multiple other ARPA-E funded projects, as subrecipients to Oklo (NYSE: OKLO) and Electric Power Research Institute (EPRI) all of which are expected to demonstrate Deep Isolation’s Universal Canister System and deep borehole disposal solution as an optimized platform for integrated management of high-level radioactive waste from the advanced nuclear industry.

“This listing is a significant milestone in our efforts toward the commercialization of our patented deep borehole disposal technology,” added Baltzer. “The momentum we have built demonstrates both the market opportunity and our capability in addressing this critical global nuclear waste challenge. Our successful APO and private raise in July 2025 allowed us to push ahead with development of a full-scale demonstration project to validate the safety and feasibility of our solution, and I look forward to keeping investors informed as this world-first initiative progresses.”

About the OTCQB Venture Market

The OTCQB Venture Market is designed for entrepreneurial and development stage U.S. and international companies. To be eligible, companies must meet certain financial standards, maintain current reporting, and undergo an annual verification and management certification process. The OTCQB quality standards provide a strong baseline of transparency, as well as the technology and regulation to improve the information and trading experience for investors. Companies on OTCQB are able to utilize OTC Link ATS for efficient trading and can make their information available at www.otcmarkets.com, the most visited website for researching and trading over-the-counter securities.

About Deep Isolation

Deep Isolation is the first company to undertake development of technologies for nuclear waste disposal in deep boreholes. When commercialized, Deep Isolation’s solution will offer a unique solution to help countries identify, plan for and complete the necessary steps to dispose of their nuclear waste inventories. With over 100 patents issued to date, Deep Isolation’s technology is being designed to leverage proven drilling practices to allow safe isolation of waste deep underground in horizontal, vertical, or slanted borehole repositories. Deep Isolation’s Universal Canister System was developed through a three-year project funded by the U.S. Department of Energy’s Advanced Research Projects Agency–Energy and is engineered to support integrated management of spent fuel and high-level radioactive waste from legacy and advanced reactors across storage, transportation, and eventual disposal. In January 2026, Deep Isolation launched a full-scale, at-depth deep borehole Commercialization Pilot for its solution at Cameron, Texas, in collaboration with the Deep Borehole Demonstration Center, Halliburton (NYSE: HAL), Amentum (NYSE: AMTM), NAC International, and Occlusion Nuclear Solutions.

For more information, visit: deepisolation.com. 

###

Media Contact:
Sophie McCallum
media@deepisolation.com

Investor Contact:
Caldwell Bailey
InvestorRelations@deepisolation.com

Forward-Looking Statements

Statements contained in this news release that are not historical facts are “forward-looking information” or “forward-looking statements” (collectively, “forward-looking statements”) within the meaning of Section 27A of the Securities Act and Section 21E of the Securities Exchange Act of 1934, as amended. Forward-looking statements include, but are not limited to, statements regarding our plans, objectives and expectations for our business, the future growth of our business and the nuclear energy and nuclear waste disposal industries as a whole, and future benefits expected to arise from our strategic partnerships. In certain cases, forward-looking statements can be identified by the use of words and phrases or variations of words and phrases or statements such as “may,” “should,” “expect,” “intend,” “plan,” “anticipate,” “believe,” “estimate,” “predict,” “will,” “could,” “project,” “target,” “potential,” “continue” and similar expressions. Forward-looking statements are based on management’s belief and assumptions, including current expectations and projections about future events and trends, and on information currently available to management.

Forward-looking statements in this or any other news release are subject to a number of risks, uncertainties, and assumptions that could cause actual results to be materially different from those expressed or implied by such forward-looking statements. Such risks, uncertainties, and assumptions are subject to a number of factors, including, among others: the failure of a market to develop for our deep borehole disposal solutions as quickly as we expect or at all; a failure of demand for our solution to develop sufficiently; regulatory and legal developments, including issues relating to obtaining regulatory approvals or permissions on the timelines we expect or at all; our lack of profitability; delays or failure in our initiative to complete a full-scale, at-depth demonstration of our Universal Canister System and our deep borehole solution; our failure to enter into contracts with customers or, once we do enter into contracts, to continue such contractual relationships or to receive new contract awards; our dependency on governmental contracts and awards and our ability to finalize negotiations on same; our failure to manage our growth effectively or to execute our business plan; our failure to sustain and expand relationships with governmental entities and strategic partners; a failure in the assumptions or analyses we have used in supporting forecasts or plans; our inability to commercialize our products at scale; the development or deployment of other technologies or solutions supplanting or competing with our technologies; challenges to our intellectual property; failures to protect, maintain, enforce, and enhance our intellectual property, and claims by others of intellectual property infringement; political and public perceptions of nuclear energy, including perceptions as to accidents or other high-profile events involving nuclear power facilities or radioactive materials; our liquidity and ability to raise capital; any inability to control operating and project costs and project delays or other project-related problems; security (including cybersecurity) breaches or disruptions; geopolitical, macroeconomic, domestic events or crises, including supply chain disruptions and other risks and uncertainties outside of our control; weather and effects of climate change; and litigation or legal proceedings that may be brought against us.

The foregoing is not an exhaustive list of all the factors that may cause any forward-looking statements to prove inaccurate or our actual results to differ materially from our expectations and forecasts. Moreover, we operate in a highly regulated environment. New risks emerge from time to time. It is not possible for our management to predict all risks, nor can we assess the impact of all factors on our business or the extent to which any factor, or combination of factors, may cause actual results to differ materially from those contained in any forward-looking statements we may make. In light of these risks, uncertainties, and assumptions, the future events and trends discussed in this release may not occur and actual results could differ materially and adversely from those anticipated or implied in the forward-looking statements, and we cannot guarantee future results, performance, or achievements. Accordingly, readers should not place undue reliance on forward-looking statements. We undertake no obligation to update any forward-looking statements for any reason after the date of this release or to conform these statements to actual results or revised expectations, except as required by law.

Additional information concerning the factors above and other factors will be found in the Company’s public filings with the Securities and Exchange Commission (the “SEC”), including the sections titled “Forward-Looking Statements” and “Risk Factors” in the Company’s Reports on Form 10-K and 10-Q for the fiscal year ended December 31, 2025 and the quarter ending March 31, 2026, respectively, as filed with the SEC, our Form S-1, originally filed August 18, 2025 and subsequently amended, our Proxy Statement for our 2026 Annual Meeting as filed on April 29, 2026, and in filings with the SEC that will be made in the future.

The Company’s SEC filings are available free of charge at www.sec.gov or on the Deep Isolation website: deepisolation.com/investors/financial-information

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Industry veteran relocates to Texas to support field execution of the project as Deep Isolation advances its full-scale demonstration and the next phase of commercialization

BERKELEY, CA – Deep Isolation Nuclear, Inc. (“Deep Isolation” or the “Company”), a leading innovator in nuclear waste disposal technology, today announced that Technology Demonstration Lead Jon Tedrick has relocated to Texas to support execution of the Company’s demonstration program at the Deep Borehole Demonstration Center (DBDC) near Cameron, Texas. The relocation reflects Deep Isolation’s commitment to establishing a strong field presence as the project progresses toward active operations.

The demonstration program is designed to validate key components of the Company’s deep borehole disposal solution under representative field conditions. Earlier this year, Deep Isolation and its collaborators marked the launch of the project with a groundbreaking ceremony at the DBDC. Through the project, Deep Isolation plans to demonstrate the construction of a deep borehole repository using standard oil and gas drilling practices, full-scale canister emplacement and retrieval operations using its Universal Canister System (UCS), and simulated surface handling operations.

Tedrick’s relocation coincides with Deep Isolation’s recent selection for the U.S. Department of Energy’s ARPA-E SCALEUP Ready program, which is designed to accelerate promising energy technologies toward commercial deployment. The program provides up to $20 million to the Company to support testing and demonstration activities. The Deep Isolation project brings together a world-class team, including Westinghouse, NAC International (TYO: 7004), Halliburton (NYSE: HAL), Occlusion Nuclear Solutions, Amentum (NYSE: AMTM) and the Deep Borehole Demonstration Center, to demonstrate an integrated solution for the storage, transportation and permanent disposal of advanced reactor and nuclear recycling waste.

As Technology Demonstration Lead, Tedrick is responsible for coordinating field execution activities, supporting engagement with project collaborators and contractors, and helping oversee preparations for upcoming demonstration activities at the Cameron site. Tedrick brings more than 28 years of drilling and project management experience spanning mining, geothermal, environmental and energy applications, including leadership of major drilling programs for the U.S. Department of Energy.

“The Cameron demonstration program is an important milestone in our path to commercialization and a critical opportunity to validate our technology at full scale,” said Rod Baltzer, CEO of Deep Isolation. “As we move closer to field execution, having Jon on the ground strengthens on-site coordination and helps ensure we are prepared to successfully deliver this first-of-its-kind demonstration. His extensive drilling and project leadership experience will be invaluable as we advance toward active operations.”

“Throughout my career, I have worked on complex drilling projects across the energy, mining and environmental sectors, but few have combined this level of technical innovation with such an important mission,” said Tedrick. “Relocating to Texas allows me to work closely with our field team as we prepare for the next phase of execution. I am excited to help demonstrate how proven drilling technologies can be applied to address one of the nuclear industry’s most significant challenges.”

As interest in advanced nuclear energy continues to grow, the need for practical, scalable solutions for the management and disposal of spent nuclear fuel and high-level radioactive waste has become increasingly important. Supported by ARPA-E’s SCALEUP Ready program and a consortium of leading industry collaborators, the Cameron project is designed to advance the technical, operational and regulatory foundations needed for future deployment of an integrated solution for the storage, transportation and permanent disposal of advanced reactor and nuclear recycling waste.

About Deep Isolation

Deep Isolation is the first company to undertake development of technologies for nuclear waste disposal in deep boreholes. When commercialized, Deep Isolation’s solution will offer a unique solution to help countries identify, plan for and complete the necessary steps to dispose of their nuclear waste inventories. With over 100 patents issued to date, Deep Isolation’s technology is being designed to leverage proven drilling practices to allow safe isolation of waste deep underground in horizontal, vertical, or slanted borehole repositories. Deep Isolation’s Universal Canister System was developed through a three-year project funded by the U.S. Department of Energy’s Advanced Research Projects Agency–Energy and is engineered to support integrated management of spent fuel and high-level radioactive waste from legacy and advanced reactors across storage, transportation, and eventual disposal.  In January 2026, Deep Isolation launched a full-scale, at-depth deep borehole Commercialization Pilot for its solution at Cameron, Texas, in collaboration with the Deep Borehole Demonstration Center, Halliburton (NYSE: HAL), Amentum (NYSE: AMTM), NAC International, and Occlusion Nuclear Solutions.

###

For more information, visit: deepisolation.com 

Media Contact:
Sophie McCallum
media@deepisolation.com

Investor Contact:
Caldwell Bailey
InvestorRelations@deepisolation.com

Forward-Looking Statements

Statements contained in this news release that are not historical facts are “forward-looking information” or “forward-looking statements” (collectively, “forward-looking statements”) within the meaning of Section 27A of the Securities Act and Section 21E of the Securities Exchange Act of 1934, as amended. Forward-looking statements include, but are not limited to, statements regarding our plans, objectives and expectations for our business, the future growth of our business and the nuclear energy and nuclear waste disposal industries as a whole, and future benefits expected to arise from our strategic partnerships. In certain cases, forward-looking statements can be identified by the use of words and phrases or variations of words and phrases or statements such as “may,” “should,” “expect,” “intend,” “plan,” “anticipate,” “believe,” “estimate,” “predict,” “will,” “could,” “project,” “target,” “potential,” “continue” and similar expressions. Forward-looking statements are based on management’s belief and assumptions, including current expectations and projections about future events and trends, and on information currently available to management.

Forward-looking statements in this or any other news release are subject to a number of risks, uncertainties, and assumptions that could cause actual results to be materially different from those expressed or implied by such forward-looking statements. Such risks, uncertainties, and assumptions are subject to a number of factors, including, among others: the failure of a market to develop for our deep borehole disposal solutions as quickly as we expect or at all; a failure of demand for our solution to develop sufficiently; regulatory and legal developments, including issues relating to obtaining regulatory approvals or permissions on the timelines we expect or at all; our lack of profitability; delays or failure in our initiative to complete a full-scale, at-depth demonstration of our Universal Canister System and our deep borehole solution; our failure to enter into contracts with customers or, once we do enter into contracts, to continue such contractual relationships or to receive new contract awards; our dependency on governmental contracts and awards and our ability to finalize negotiations on same; our failure to manage our growth effectively or to execute our business plan; our failure to sustain and expand relationships with governmental entities and strategic partners; a failure in the assumptions or analyses we have used in supporting forecasts or plans; our inability to commercialize our products at scale; the development or deployment of other technologies or solutions supplanting or competing with our technologies; challenges to our intellectual property; failures to protect, maintain, enforce, and enhance our intellectual property, and claims by others of intellectual property infringement; political and public perceptions of nuclear energy, including perceptions as to accidents or other high-profile events involving nuclear power facilities or radioactive materials; our liquidity and ability to raise capital; any inability to control operating and project costs and project delays or other project-related problems; security (including cybersecurity) breaches or disruptions; geopolitical, macroeconomic, domestic events or crises, including supply chain disruptions and other risks and uncertainties outside of our control; weather and effects of climate change; and litigation or legal proceedings that may be brought against us.

The foregoing is not an exhaustive list of all the factors that may cause any forward-looking statements to prove inaccurate or our actual results to differ materially from our expectations and forecasts. Moreover, we operate in a highly regulated environment. New risks emerge from time to time. It is not possible for our management to predict all risks, nor can we assess the impact of all factors on our business or the extent to which any factor, or combination of factors, may cause actual results to differ materially from those contained in any forward-looking statements we may make. In light of these risks, uncertainties, and assumptions, the future events and trends discussed in this release may not occur and actual results could differ materially and adversely from those anticipated or implied in the forward-looking statements, and we cannot guarantee future results, performance, or achievements. Accordingly, readers should not place undue reliance on forward-looking statements. We undertake no obligation to update any forward-looking statements for any reason after the date of this release or to conform these statements to actual results or revised expectations, except as required by law. Additional information concerning the factors above and other factors will be found in the Company’s public filings with the Securities and Exchange Commission (the “SEC”), including the sections titled “Forward-Looking Statements” and “Risk Factors” in the Company’s Reports on Form 10-K and 10-Q for the fiscal year ended December 31, 2025 and the quarter ending March 31, 2026, respectively, as filed with the SEC on March 30, 2026, our Form S-1, originally filed August 18, 2025 and subsequently amended, our Proxy Statement for our 2026 Annual Meeting as filed on April 29, 2026, and in filings with the SEC that will be made in the future.

The Company’s SEC filings are available free of charge at www.sec.gov or upon written request to Deep Isolation at InvestorRelations@deepisolation.com or CorpSec@deepisolation.com.

### 

Expanded international patent portfolio supports commercialization of integrated storage, transportation and disposal solutions

BERKELEY, CA – Deep Isolation Nuclear, Inc. (“Deep Isolation” or the “Company”), a leading innovator in nuclear waste disposal technology, today announced that it has reached more than 100 issued patents worldwide, marking a major milestone in the Company’s effort to develop safe, scalable and cost-effective solutions for the permanent disposal of spent nuclear fuel and high-level radioactive waste.

This achievement reflects Deep Isolation’s strategy to build an integrated intellectual property footprint that protects every stage of the nuclear waste disposal lifecycle. Collectively, the patent portfolio is designed to support an end-to-end disposal ecosystem, including repository architecture, advanced methods for geologic site characterization, canister and packaging systems, emplacement and retrieval technologies, and closure and repository monitoring systems.

“Our patent portfolio reflects a decade of scientific research, engineering development and operational planning focused on solving one of the nuclear industry’s most critical challenges,” said Rod Baltzer, CEO of Deep Isolation. “Surpassing 100 issued patents demonstrates the depth and breadth of our innovation strategy and reinforces our commitment to delivering practical disposal solutions.”

Deep Isolation’s patents support its directional drilling-based disposal technology, which is designed to isolate nuclear waste deep underground in horizontal, slanted, or vertical borehole repositories. The portfolio also includes technologies related to the Company’s Universal Canister System (UCS), a unique packaging platform engineered to support integrated storage, transportation and disposal for waste from advanced reactor and recycling technologies as well as spent nuclear fuel from the existing light water reactor fleet. Deep Isolation’s intellectual property includes patents and applications across major nuclear markets including North America, Europe and Asia.

The milestone comes as governments and advanced reactor developers increasingly prioritize long-term waste management strategies alongside nuclear deployment plans. As interest in nuclear energy continues to grow globally, Deep Isolation and its supply chain partners stand ready to support energy generators with IP embedded in a safe, scalable, licensing-ready disposal solution. 

“Deep Isolation has developed a comprehensive intellectual property portfolio in advanced nuclear waste management,” said Eric Knox, Vice President of Strategic Development at Amentum. “Their portfolio is supported by detailed engineering, prototyping, testing and supply-chain capabilities – which is why we are excited about working with other supply chain partners to deliver a full-scale, at-depth Commercial Pilot for Deep Isolation’s solution at Cameron, Texas.”

About Deep Isolation

Deep Isolation is the first company to undertake development of technologies for nuclear waste disposal in deep boreholes. When commercialized, Deep Isolation’s solution will offer a unique solution to help countries identify, plan for and complete the necessary steps to dispose of their nuclear waste inventories. With over 100 patents issued to date, Deep Isolation’s technology is being designed to leverage proven drilling practices to allow safe isolation of waste deep underground in horizontal, vertical, or slanted borehole repositories. Deep Isolation’s Universal Canister System was developed through a three-year project funded by the U.S. Department of Energy’s Advanced Research Projects Agency–Energy and is engineered to support integrated management of spent fuel and high-level radioactive waste from legacy and advanced reactors across storage, transportation, and eventual disposal.  In January 2026, Deep Isolation launched a full-scale, at-depth deep borehole Commercialization Pilot for its solution at Cameron, Texas, in collaboration with the Deep Borehole Demonstration Center, Halliburton (NYSE: HAL), Amentum (NYSE: AMTM), NAC International, and Occlusion Nuclear Solutions.

###

For more information, visit: deepisolation.com 

Media Contact:
Sophie McCallum
media@deepisolation.com

Investor Contact:
Caldwell Bailey
InvestorRelations@deepisolation.com

Forward-Looking Statements

Statements contained in this news release that are not historical facts are “forward-looking information” or “forward-looking statements” (collectively, “forward-looking statements”) within the meaning of Section 27A of the Securities Act and Section 21E of the Securities Exchange Act of 1934, as amended. Forward-looking statements include, but are not limited to, statements regarding our plans, objectives and expectations for our business, the future growth of our business and the nuclear energy and nuclear waste disposal industries as a whole, and future benefits expected to arise from our strategic partnerships. In certain cases, forward-looking statements can be identified by the use of words and phrases or variations of words and phrases or statements such as “may,” “should,” “expect,” “intend,” “plan,” “anticipate,” “believe,” “estimate,” “predict,” “will,” “could,” “project,” “target,” “potential,” “continue” and similar expressions. Forward-looking statements are based on management’s belief and assumptions, including current expectations and projections about future events and trends, and on information currently available to management. 

Forward-looking statements in this or any other news release are subject to a number of risks, uncertainties, and assumptions that could cause actual results to be materially different from those expressed or implied by such forward-looking statements. Such risks, uncertainties, and assumptions are subject to a number of factors, including, among others: the failure of a market to develop for our deep borehole disposal solutions as quickly as we expect or at all; a failure of demand for our solution to develop sufficiently; regulatory and legal developments, including issues relating to obtaining regulatory approvals or permissions on the timelines we expect or at all; our lack of profitability; delays or failure in our initiative to complete a full-scale, at-depth demonstration of our Universal Canister System and our deep borehole solution; our failure to enter into contracts with customers or, once we do enter into contracts, to continue such contractual relationships or to receive new contract awards; our dependency on governmental contracts and awards and our ability to finalize negotiations on same; our failure to manage our growth effectively or to execute our business plan; our failure to sustain and expand relationships with governmental entities and strategic partners; a failure in the assumptions or analyses we have used in supporting forecasts or plans; our inability to commercialize our products at scale; the development or deployment of other technologies or solutions supplanting or competing with our technologies; challenges to our intellectual property; failures to protect, maintain, enforce, and enhance our intellectual property, and claims by others of intellectual property infringement; political and public perceptions of nuclear energy, including perceptions as to accidents or other high-profile events involving nuclear power facilities or radioactive materials; our liquidity and ability to raise capital; any inability to control operating and project costs and project delays or other project-related problems; security (including cybersecurity) breaches or disruptions; geopolitical, macroeconomic, domestic events or crises, including supply chain disruptions and other risks and uncertainties outside of our control; weather and effects of climate change; and litigation or legal proceedings that may be brought against us. 

The foregoing is not an exhaustive list of all the factors that may cause any forward-looking statements to prove inaccurate or our actual results to differ materially from our expectations and forecasts. Moreover, we operate in a highly regulated environment. New risks emerge from time to time. It is not possible for our management to predict all risks, nor can we assess the impact of all factors on our business or the extent to which any factor, or combination of factors, may cause actual results to differ materially from those contained in any forward-looking statements we may make. In light of these risks, uncertainties, and assumptions, the future events and trends discussed in this release may not occur and actual results could differ materially and adversely from those anticipated or implied in the forward-looking statements, and we cannot guarantee future results, performance, or achievements. Accordingly, readers should not place undue reliance on forward-looking statements. We undertake no obligation to update any forward-looking statements for any reason after the date of this release or to conform these statements to actual results or revised expectations, except as required by law. 

Additional information concerning the factors above and other factors will be found in the Company’s public filings with the Securities and Exchange Commission (the “SEC”), including the sections titled “Forward-Looking Statements” and “Risk Factors” in the Company’s Reports on Form 10-K and 10-Q for the fiscal year ended December 31, 2025 and the quarter ending March 31, 2026, respectively, as filed with the SEC, our Form S-1, originally filed August 18, 2025 and subsequently amended, our Proxy Statement for our 2026 Annual Meeting as filed on April 29, 2026, and in filings with the SEC that will be made in the future.

The Company’s SEC filings are available free of charge at www.sec.gov or upon written request to Deep Isolation at InvestorRelations@deepisolation.com or CorpSec@deepisolation.com.

### 

Operational Highlights for the First Quarter of 2026

• Launched a non-radioactive, full-scale, at-depth demonstration of the Company’s deep borehole waste disposal technology at Halliburton’s Drilling Technology Facility near Cameron, TX
• Successfully completed work under the U.S. Department of Energy Advanced Research Projects Agency-Energy’s (“ARPA-E”) Optimizing Nuclear Waste and Advanced Reactor Disposal Systems (“ONWARDS”), a project led by Oklo, Inc.
• Selected to participate in ARPA-E’s SCALEUP Ready program, providing up to $20 million to accelerate market adoption of Deep Isolation’s deep borehole waste disposal technology and the first time a company in the nuclear industry has been selected to participate
• Appointed nuclear industry veteran Ralph L. Hunter to the board of directors on January 23, 2026
• Appointed Paula Whitten-Doolin as General Counsel on February 3, 2026
• Appointed Joseph Nelson as Chief Financial Officer on February 17, 2026
• Appointed nuclear operations leader Matthew Sunseri to its advisory board on March 2, 2026
• The SEC declared Deep Isolation Nuclear, Inc.’s registration statement on Form S-1 effective on May 7, 2026, allowing the common stock of the Company to be freely tradable

Financial Highlights for the First Quarter of 2026

• Reported consolidated revenue of $1.4 million
• Reported research and development expense of approximately $3.5 million related to the start of the non-radioactive, full-scale, at-depth demonstration of our deep borehole waste disposal technology 
• Had available cash of $22.2 million as of March 31, 2026
• Reported a net loss of $5.4 million primarily attributable to research and development expenses
• Total common shares outstanding as of May 12, 2026 of 57,647,613

BERKELEY, CA – Deep Isolation Nuclear, Inc. (“Deep Isolation” or the “Company”), a leading innovator in nuclear waste disposal technology, today announced its operational and financial results for the three-months ended March 31, 2026.

“We are thrilled to be reporting Deep Isolation’s first earnings as a public company,”  said Rod Baltzer, CEO of Deep Isolation. “Our operational momentum in the first quarter was encouraging – breaking ground on our full-scale demonstration project in Cameron, Texas marks a pivotal milestone as we move from the R&D phase toward deployment, showcasing our innovative approach to safe nuclear waste disposal.

“Additionally, our selection for ARPA-E’s SCALEUP Ready program positions us to accelerate commercialization with support from the Department of Energy. These achievements demonstrate our team’s execution capabilities and reinforce Deep Isolation’s leadership in delivering practical solutions for one of the nuclear industry’s most critical challenges. We believe we are entering the market at the exact right time, as the entire nuclear industry is scaling up, gaining momentum  and in need of a scalable waste disposal solution.”

Operational Progress

Deep Isolation advanced several strategic initiatives during the quarter, including the launch of its full-scale technology demonstration program in Cameron, Texas, in collaboration with Halliburton and the Deep Borehole Demonstration Center. The program, which includes collaboration with Westinghouse, NAC International, Occlusion Nuclear Solutions, and Amentum, is designed to demonstrate a fully integrated deep borehole disposal solution for advanced reactor and nuclear recycling waste. The non-radioactive demonstration project is expected to provide operational data and support stakeholder and regulatory confidence as the Company advances commercialization of its technology.

The Company also announced the successful completion of its work under the ARPA-E ONWARDS program, confirming through modeling and analysis that waste streams from advanced reactor fuel recycling are compatible with Deep Isolation’s deep borehole disposal system and can achieve long-term safety performance significantly exceeding target standards. In addition, Deep Isolation was selected for ARPA-E’s SCALEUP Ready program to support commercial deployment of its Universal Canister System, with the Company advancing through the contracting phase for potential funding of up to $20 million to support its Cameron, Texas demonstration project. Deep Isolation is the first company in the nuclear industry to have ever been selected to participate in ARPA-E’s SCALEUP Ready program.

Commercial Progress and Other Company Events

During the quarter, Deep Isolation strengthened its leadership and governance capabilities through several key appointments. The Company appointed Ralph L. Hunter to its Board of Directors, bringing more than 35 years of nuclear industry experience, including senior leadership roles across advanced nuclear development, operations, and policy. Deep Isolation also appointed Paula Whitten-Doolin as General Counsel and Joseph Nelson as Chief Financial Officer to support the Company’s commercialization efforts, public company readiness, and strategic growth initiatives. In addition, the Company appointed nuclear operations leader Matthew Sunseri to its Advisory Board, adding significant expertise in nuclear safety, regulatory strategy, and operational governance as Deep Isolation advances its demonstration and commercialization programs.

On May 8, 2026, the U.S. Securities and Exchange Commission (SEC) declared Deep Isolation’s registration statement on Form S-1 effective, allowing the Company’s common stock to be freely tradable. The Company is actively working with OTC Markets Group, Inc. to enable its shares of common stock to be traded on the OTCQB exchange.  

Financial Summary

	For the Three Months Ended	For the Three Months Ended
Amounts in thousands of U.S. dollars	March 31, 2026	March 31, 2025
Revenue	$ 1,447	$ 1,520
Research and development expense	$ 3,489	$ —
Selling, general and administrative expenses	$ 2,840	$ 993
Net Loss	$ (5,416)	$ (166)
EBITDA1	$ (5,563)	$ (135)
Adjusted EBITDA1	$ (1,536)	$ (135)
Cash	$ 22,226	$ 2,150

Revenue decreased by approximately $73 thousand, or 5%, for the three months ended March 31, 2026, compared to the three months ended March 31, 2025. The decrease in revenue was primarily attributable to lower revenues at Deep Isolation following the completion of certain projects during 2025, offset by higher revenues at the Company’s subsidiary, Freestone Environmental Services, due to an increase in the number of active contracts.

Research and development expense increased by approximately $3.5 million for the three months ended March 31, 2026, compared to the three months ended March 31, 2025. The increase in research and development expense was attributed to the ordering of long-lead items and front-end engineering work related to the Company’s non-radioactive, full-scale, at-depth demonstration of its deep borehole technologies.

Selling, General and Administrative expenses increased by approximately $1.8 million, or 186%, for the three months ended March 31, 2026, compared to the three months ended March 31, 2025. The increase in selling, general and administrative expenses was primarily attributable to higher accounting, audit, legal and travel expenses along with addition of 4 new employees, including the Chief Financial Officer and General Counsel.

Net loss increased by approximately $5.3 million for the three months ended March 31, 2026, compared to the three months ended March 31, 2025, primarily due to the increases in research and development and selling, general and administrative expenses described above.

EBITDA¹ was ($5.6) million for the three months ended March 31, 2026, compared to ($135) thousand for the three months ended March 31, 2025. The decrease in EBITDA was primarily attributed to higher research and development expenses and selling, general, and administrative expenses as described above.

Adjusted EBITDA¹ was ($1.5) million for the three months ended March 31, 2026, compared to ($135) thousand for the three months ended March 31, 2025. The decrease in Adjusted EBITDA was primarily attributed to higher selling, general, and administrative expenses as described above.

¹ EBITDA and Adjusted EBITDA are non-GAAP financial measures and should not be used in isolation or as a substitute for Deep Isolation’s financial results presented in accordance with Generally Accepted Accounting Principles (“GAAP”). For the definitions and reconciliations of these measures to the most directly comparable financial measures calculated and presented in accordance with GAAP, please refer to Exhibit II at the end of this press release

Conference Call

Deep Isolation will host a conference call to discuss their operational and financial results for the first quarter of 2026 on Thursday May 14, 2026 at 8:30AM ET. The presentation of the Company’s operational and financial results will be followed by a live Q&A session.

A webcast of the conference call will be accessible on Deep Isolation’s investor relations website at https://www.deepisolation.com/investors/. The earnings release and presentation will also be posted to the investor relations website prior to the conference call.

The live conference call may also be accessed by telephone by dialing (877) 704-4453 or (201) 389-0920. For those unable to listen to the live conference call, a replay will be available after the call through the archived webcast on Deep Isolation’s investor relations website or by dialing (844) 512-2921or (412) 317-6671. The access code for the replay is 13760350. The replay will be available for 30 days following the live call.

View Exhibit I: Unaudited Interim Financial Information

View Exhibit II: Non-GAAP Financial Measures: EBITDA and Adjusted EBITDA

About Deep Isolation

Deep Isolation is the first company to undertake development of technologies for nuclear waste disposal in deep boreholes. When commercialized Deep Isolation’s solution will offer a uniquely tailored solution to help countries identify, plan for and complete the necessary steps to dispose of their nuclear waste inventories. With 99 patents issued to date, Deep Isolation’s technology is being designed to leverage proven drilling practices to allow safe isolation of waste deep underground in horizontal, vertical, or slanted borehole repositories. Deep Isolation’s Universal Canister System was developed through a three-year project funded by the U.S. Department of Energy’s Advanced Research Projects Agency—Energy and is engineered to support integrated management of spent fuel and high-level radioactive waste from legacy and advanced reactors across storage, transportation and eventual disposal.

###

For more information, visit: deepisolation.com 

Media Contact:
Sophie McCallum
media@deepisolation.com

Investor Contact:
Caldwell Bailey
InvestorRelations@deepisolation.com

Forward-Looking Statements

Statements contained in this news release that are not historical facts are “forward-looking information” or “forward-looking statements” (collectively, “forward-looking statements”) within the meaning of Section 27A of the Securities Act and Section 21E of the Securities Exchange Act of 1934, as amended. Forward-looking statements include, but are not limited to, statements regarding our plans, objectives and expectations for our business, the future growth of our business and the nuclear energy and nuclear waste disposal industries as a whole, and future benefits expected to arise from our strategic partnerships. In certain cases, forward-looking statements can be identified by the use of words and phrases or variations of words and phrases or statements such as “may,” “should,” “expect,” “intend,” “plan,” “anticipate,” “believe,” “estimate,” “predict,” “will,” “could,” “project,” “target,” “potential,” “continue” and similar expressions. Forward-looking statements are based on management’s belief and assumptions, including current expectations and projections about future events and trends, and on information currently available to management. 

Forward-looking statements in this or any other news release are subject to a number of risks, uncertainties, and assumptions that could cause actual results to be materially different from those expressed or implied by such forward-looking statements. Such risks, uncertainties, and assumptions are subject to a number of factors, including, among others: the failure of a market to develop for our deep borehole disposal solutions as quickly as we expect or at all; a failure of demand for our solution to develop sufficiently; regulatory and legal developments, including issues relating to obtaining regulatory approvals or permissions on the timelines we expect or at all; our lack of profitability; delays or failure in our initiative to complete a full-scale, at-depth demonstration of our Universal Canister System and our deep borehole solution; our failure to enter into contracts with customers or, once we do enter into contracts, to continue such contractual relationships or to receive new contract awards; our dependency on governmental contracts and awards; our  failure to manage our growth effectively or to execute our business plan; a failure to sustain and expand relationships with governmental entities and strategic partners; failure in the assumptions or analyses we have used in supporting forecasts or plans; our inability to commercialize our products at scale; the development or deployment of other technologies or solutions supplanting or competing with our technologies; challenges to our intellectual property; failures to protect, maintain, enforce, and enhance our intellectual property, and claims by others of intellectual property infringement; political and public perceptions of nuclear energy, including perceptions as to accidents or other high-profile events involving nuclear power facilities or radioactive materials; our liquidity and ability to raise capital; any inability to control operating and project costs and project delays or other project-related problems; security (including cybersecurity) breaches or disruptions; geopolitical, macroeconomic, domestic events or crises, including supply chain disruptions and other risks and uncertainties outside of our control; weather and effects of climate change; and litigation or legal proceedings that may be brought against us. 

The foregoing is not an exhaustive list of all the factors that may cause any forward-looking statements to prove inaccurate or our actual results to differ materially from our expectations and forecasts. Moreover, we operate in a highly regulated environment. New risks emerge from time to time. It is not possible for our management to predict all risks, nor can we assess the impact of all factors on our business or the extent to which any factor, or combination of factors, may cause actual results to differ materially from those contained in any forward-looking statements we may make. In light of these risks, uncertainties, and assumptions, the future events and trends discussed in this release may not occur and actual results could differ materially and adversely from those anticipated or implied in the forward-looking statements, and we cannot guarantee future results, performance, or achievements. Accordingly, readers should not place undue reliance on forward-looking statements. We undertake no obligation to update any forward-looking statements for any reason after the date of this release or to conform these statements to actual results or revised expectations, except as required by law. ”

Additional information concerning the factors above and other factors will be found in the Company’s public filings with the Securities and Exchange Commission (the “SEC”), including the sections titled “Forward-Looking Statements” and “Risk Factors” in the Company’s Quarterly Report on Form 10-Q for the quarter ended September 30, 2025 filed with the SEC on November 14, 2025, our Form S-1, originally filed August 18, 2025 and subsequently amended, our Proxy Statement for our 2026 Annual Meeting as filed on April 29, 2026, and in filings with the SEC that will be made in the future. The Company’s SEC filings are available free of charge at www.sec.gov or upon written request to Deep Isolation Nuclear at InvestorRelations@deepisolation.com. 

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SCALEUP award supports Cameron, Texas Commercial Pilot to demonstrate and scale permanent nuclear waste solution for commercial deployment

BERKELEY, CA – Deep Isolation Nuclear, Inc. (“Deep Isolation” or the “Company”), a leading innovator in nuclear waste disposal technology, today announced it was selected for the U.S. Department of Energy’s ARPA-E SCALEUP Ready program, supporting the commercial deployment of its Universal Canister System (UCS) for integrated nuclear waste management. SCALEUP Ready is ARPA-E’s latest initiative to accelerate technologies toward market adoption and committed up to $40 million to support two projects, including the Deep Isolation project. Read more: ARPA-E Announcement.

The SCALEUP program bridges the gap between pilot-scale demonstration and full commercial deployment, providing funding and support to validate first-of-a-kind energy technologies. For Deep Isolation, the award would enable full-scale field testing of the UCS, including regulatory validation and demonstration of deep borehole disposal using a nonradioactive Commercial Pilot in Cameron, Texas.

The project brings together a world-class project team, including Westinghouse, NAC International (TYO: 7004), Halliburton (NYSE: HAL), Occlusion Nuclear Solutions, Amentum (NYSE: AMTM), and the Deep Borehole Demonstration Center (“the DBDC”), to demonstrate a fully integrated and permanent solution for advanced reactor and nuclear recycling waste. Westinghouse will serve as the launch customer, working with Deep Isolation and its supply chain partners to secure certification from the Nuclear Regulatory Commission to enable the UCS  to store and transport spent fuel from its eVinci™ microreactor. Halliburton will lead borehole construction, Occlusion will manage subsurface operations, NAC will lead UCS fabrication, surface operations, and licensing, and Amentum will oversee operational safety and quality assurance, ensuring the system is ready for commercial deployment.

“Being selected for this award is the single biggest milestone in Deep Isolation’s history,” said Rod Baltzer, President and CEO at Deep Isolation. “It validates years of pioneering work on the Universal Canister System and positions us to deliver the world’s first full-scale, end-to-end, commercial-ready deep borehole disposal solution. We are creating a deployable, regulatory-approved system that will transform how the world manages nuclear waste safely, efficiently, and permanently.”

“The integration of UCS with our eVinci™ microreactor technology provides a comprehensive solution for managing spent nuclear fuel through its entire lifecycle,” said Dr. Lou Martinez Sancho, Westinghouse Chief Technology Officer. “This partnership showcases the impact of innovation, where we are merging our next-generation nuclear technology with a reliable, economical and adaptable method for handling nuclear waste. The Commercial Pilot will generate valuable insights which will set the stage for wider adoption and global confidence in advanced nuclear solutions.”

“Deep boreholes have long been considered a promising solution for spent nuclear fuel and high-level nuclear waste disposal.  Amentum is excited to work with Deep Isolation and its collaborators to move this concept toward commercialization and turn it into a practical reality.” said Mark Whitney, President Energy & Environment at Amentum.

The UCS SCALEUP project advances critical national priorities, supporting Executive Order 14302, which directs the Department of Energy to strengthen U.S. nuclear energy leadership and develop permanent solutions for spent nuclear fuel and high-level waste. The project directly aligns with ARPA-E’s mission to improve radioactive waste management and maintain U.S. technological leadership in advanced energy technologies.

About Deep Isolation

Deep Isolation is the first company to undertake development of technologies for nuclear waste disposal in deep boreholes. When commercialized Deep Isolation’s solution will offer a uniquely tailored solution to help countries identify, plan for and complete the necessary steps to dispose of their nuclear waste inventories. With 99 patents issued to date, Deep Isolation’s technology is being designed to leverage proven drilling practices to allow safe isolation of waste deep underground in horizontal, vertical, or slanted borehole repositories. Deep Isolation’s Universal Canister System was developed through a three-year project funded by the U.S. Department of Energy’s Advanced Research Projects Agency—Energy and is engineered to support integrated management of spent fuel and high-level radioactive waste from legacy and advanced reactors across storage, transportation and eventual disposal.

###

For more information, visit: deepisolation.com 

Media Contact:
Sophie McCallum
media@deepisolation.com

Investor Contact:
Caldwell Bailey
InvestorRelations@deepisolation.com

Forward-Looking Statements

Statements contained in this news release that are not historical facts are “forward-looking information” or “forward-looking statements” (collectively, “forward-looking statements”) within the meaning of Section 27A of the Securities Act and Section 21E of the Securities Exchange Act of 1934, as amended. Forward-looking statements include, but are not limited to, statements regarding our plans, objectives and expectations for our business, the future growth of our business and the nuclear energy and nuclear waste disposal industries as a whole, and future benefits expected to arise from our strategic partnerships. In certain cases, forward-looking statements can be identified by the use of words and phrases or variations of words and phrases or statements such as “may,” “should,” “expect,” “intend,” “plan,” “anticipate,” “believe,” “estimate,” “predict,” “will,” “could,” “project,” “target,” “potential,” “continue” and similar expressions. Forward-looking statements are based on management’s belief and assumptions, including current expectations and projections about future events and trends, and on information currently available to management. 

Forward-looking statements in this or any other news release are subject to a number of risks, uncertainties, and assumptions that could cause actual results to be materially different from those expressed or implied by such forward-looking statements. Such risks, uncertainties, and assumptions are subject to a number of factors, including, among others: the failure of a market to develop for our deep borehole disposal solutions as quickly as we expect or at all; a failure of demand for our solution to develop sufficiently; regulatory and legal developments, including issues relating to obtaining regulatory approvals or permissions on the timelines we expect or at all; our lack of profitability; delays or failure in our initiative to complete a full-scale, at-depth demonstration of our Universal Canister System and our deep borehole solution; our failure to enter into contracts with customers or, once we do enter into contracts, to continue such contractual relationships or to receive new contract awards; our dependency on governmental contracts and awards; our  failure to manage our growth effectively or to execute our business plan; a failure to sustain and expand relationships with governmental entities and strategic partners; failure in the assumptions or analyses we have used in supporting forecasts or plans; our inability to commercialize our products at scale; the development or deployment of other technologies or solutions supplanting or competing with our technologies; challenges to our intellectual property; failures to protect, maintain, enforce, and enhance our intellectual property, and claims by others of intellectual property infringement; political and public perceptions of nuclear energy, including perceptions as to accidents or other high-profile events involving nuclear power facilities or radioactive materials; our liquidity and ability to raise capital; any inability to control operating and project costs and project delays or other project-related problems; security (including cybersecurity) breaches or disruptions; geopolitical, macroeconomic, domestic events or crises, including supply chain disruptions and other risks and uncertainties outside of our control; weather and effects of climate change; and litigation or legal proceedings that may be brought against us. 

The foregoing is not an exhaustive list of all the factors that may cause any forward-looking statements to prove inaccurate or our actual results to differ materially from our expectations and forecasts. Moreover, we operate in a highly regulated environment. New risks emerge from time to time. It is not possible for our management to predict all risks, nor can we assess the impact of all factors on our business or the extent to which any factor, or combination of factors, may cause actual results to differ materially from those contained in any forward-looking statements we may make. In light of these risks, uncertainties, and assumptions, the future events and trends discussed in this release may not occur and actual results could differ materially and adversely from those anticipated or implied in the forward-looking statements, and we cannot guarantee future results, performance, or achievements. Accordingly, readers should not place undue reliance on forward-looking statements. We undertake no obligation to update any forward-looking statements for any reason after the date of this release or to conform these statements to actual results or revised expectations, except as required by law. ”

Additional information concerning the factors above and other factors will be found in the Company’s public filings with the Securities and Exchange Commission (the “SEC”), including the sections titled “Forward-Looking Statements” and “Risk Factors” in the Company’s Quarterly Report on Form 10-Q for the quarter ended September 30, 2025 filed with the SEC on November 14, 2025, our Form S-1, originally filed August 18, 2025 and subsequently amended, and in filings with the SEC that will be made in the future. The Company’s SEC filings are available free of charge at www.sec.gov or upon written request to Deep Isolation Nuclear at InvestorRelations@deepisolation.com. 

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