Deep Fission is a nuclear energy technology company focused on developing a small modular reactor called the Gravity Reactor that combines established pressurized water reactor technology with novel emplacement in deep boreholes approximately one mile below the Earth's surface. The reactor module is designed to be installed within a vertical borehole lined with steel casing and cement, surrounded by a column of water that provides hydrostatic pressure to support reactor…
Deep Fission is a nuclear energy technology company focused on developing a small modular reactor called the Gravity Reactor that combines established pressurized water reactor technology with novel emplacement in deep boreholes approximately one mile below the Earth's surface. The reactor module is designed to be installed within a vertical borehole lined with steel casing and cement, surrounded by a column of water that provides hydrostatic pressure to support reactor operation and cooling. This subsurface approach aims to reduce reliance on large surface containment structures, lower capital and operating costs, improve security, enhance safety, and accelerate deployment timelines compared to conventional nuclear power plants. Each Gravity Reactor unit targets up to 15 megawatts of electric power output and can be deployed individually or clustered in groups of boreholes at a single site to scale capacity to hundreds or even thousands of megawatts. The company is advancing through a phased deployment plan that includes engineering validation, demonstration of a commercial scale borehole, DOE authorization, and eventual pursuit of NRC licensing for commercial operation, with the goal of reaching commercialization within the next three years.
Deep Fission intends to generate revenue through three primary streams. First, it plans to participate in project-level equity ownership of Gravity Reactor facilities, thereby receiving indirect cash flows from electricity sales under long-term power purchase agreements or similar offtake arrangements with customers. Second, the company expects to earn one-time upfront revenue from services related to reactor delivery, integration, engineering support, project development, and construction coordination for each installation. Third, it aims to secure recurring revenue from technology licensing of its proprietary reactor design, subsurface emplacement methods, and related systems, as well as from ongoing operations and maintenance support for deployed reactor units. Although the company remains in the development stage and has not yet generated revenue, its business model is structured to capture value across the project lifecycle from early development through long-term operation.
Deep Fission competes in the emerging small modular reactor market alongside advanced reactor developers such as TerraPower, X-energy, Kairos Power, Oklo, NuScale Power, and Last Energy, as well as established nuclear vendors including Westinghouse Electric Company, GE-Hitachi Nuclear Energy, and Holtec International. The company differentiates itself through its deep borehole emplacement concept, which leverages natural geological formations for structural confinement and shielding, uses hydrostatic pressure from a water column to support reactor pressure and cooling, and reduces the need for expansive surface safety infrastructure. This approach is intended to lower capital expenditures, shorten construction schedules, enhance security against surface-based hazards, and provide a modular scaling path that aligns with growing electricity demand from data centers and industrial users. Additionally, Deep Fission’s intellectual property portfolio, which includes an issued U. S. patent and numerous pending applications covering reactor configuration, drilling techniques, thermal-hydraulic performance, and monitoring systems, creates barriers to entry and supports its competitive position in the sector.
The company’s target customers include hyperscale data centers and other digital infrastructure facilities that require large volumes of reliable baseload power to support continuous cloud computing and artificial intelligence workloads. It also serves industrial and energy-intensive plants such as advanced manufacturing, mining, chemical production, and large-scale processing facilities that need dependable electricity to maintain uninterrupted operations. Electric utilities and grid-scale generation developers represent another customer group seeking additional firm capacity to meet rising demand, replace retiring assets, or integrate intermittent renewable resources. Finally, government and defense installations are considered potential users due to their need for resilient, secure power supplies capable of operating independently of external grid disruptions. While the company’s initial focus is on the United States, it is evaluating international opportunities in jurisdictions with civil nuclear cooperation agreements with the U. S. and supportive regulatory environments for advanced nuclear deployment.
Sectors:Industrials · UtilitiesSector rationaleDeep Fission's core business is the design and manufacture of a proprietary nuclear reactor (the Gravity Reactor) and the provision of engineering, delivery, and construction services for its installation, which falls under Industrial Machinery and Power Equipment. A secondary sector of Utilities is justified because the company intends to maintain project-level equity ownership in these facilities to receive cash flows from electricity sales under power purchase agreements.Industries:Nuclear EquipmentIndustrialsPrimaryDeep Fission designs and develops the Gravity Reactor, a small modular reactor (SMR) utilizing pressurized water technology for subsurface deployment. The company's revenue model includes one-time fees for reactor delivery, integration, and technology licensing of its proprietary reactor design and subsurface emplacement methods.Nuclear PowerUtilitiesSecondaryThe company intends to maintain project-level equity ownership of its Gravity Reactor facilities to receive cash flows from electricity sales under long-term power purchase agreements, effectively operating as a nuclear power producer.Classified using BQ-MICSCIK: 0001918102
Investment Thesis
▲ Bull case
Deep Fission is positioned to capitalize on a structural shift in energy demand driven by the exponential growth of AI and data centers, which require massive, reliable, and low-carbon baseload power that intermittent renewables alone cannot provide. The company's Gravity Nuclear Reactor™ technology leverages proven pressurized water reactor (PWR) foundations—already deployed in hundreds of commercial nuclear plants worldwide—while innovating through deep underground deployment to enhance safety, reduce construction complexity, and accelerate scalability. This hybrid approach mitigates the regulatory and public perception hurdles that have historically slowed nuclear adoption, as burying the reactor one mile underground significantly reduces risks associated with surface-level accidents, seismic events, and terrorist threats, making it more palatable to regulators and local communities. With the U.S. Department of Energy selecting Deep Fission for its Reactor Pilot Program and the Parsons, Kansas project advancing toward construction, the company is transitioning from concept to tangible infrastructure, de-risking its technology pathway. The IPO proceeds of up to $156 million will directly fund engineering, R&D, licensing, and pilot construction, enabling Deep Fission to move faster than competitors reliant solely on above-ground SMR designs that face longer licensing timelines and higher capital intensity due to extensive containment structures and security measures. The market may be underestimating how this underground model could compress deployment timelines by years compared to traditional nuclear projects, potentially allowing Deep Fission to deliver its first commercial unit before 2030—a critical advantage as AI-driven electricity demand is projected to double U.S. data center power consumption by 2030, creating a multi-gigawatt addressable market for firm, clean power.
The current IPO valuation of approximately $1.66 billion implies a forward-looking multiple that may be conservative relative to the long-term value creation potential if Deep Fission successfully commercializes its Gravity Reactor™ at scale, particularly given the lack of direct pure-play nuclear SMR peers in the public market with comparable underground deployment advantages. While X-Energy’s post-IPO performance shows modest gains, Deep Fission’s technology differs fundamentally by eliminating the need for massive above-ground containment buildings and associated civil works, which typically account for 40-60% of total SMR capital costs. This cost structure advantage could translate into significantly lower levelized cost of electricity (LCOE) over the reactor’s lifetime, making it more competitive not only against fossil fuels but also against other SMRs requiring extensive surface infrastructure. The company’s targeting of utilities, industrial customers, and data centers aligns with high-credit, long-term off-takers capable of signing power purchase agreements (PPAs) that provide predictable revenue streams—essential for attracting project finance and de-risking future scaling. Furthermore, the Trump administration’s executive orders aimed at boosting domestic nuclear capacity and accelerating SMR deployment create a tailwind of potential federal loan guarantees, tax credits under the Inflation Reduction Act, and streamlined NRC licensing pathways, all of which could materially improve Deep Fission’s economics and timeline. The market may be overlooking how these policy tailwinds, combined with the company’s first-mover advantage in underground nuclear deployment, could enable rapid replication across multiple sites once the pilot is validated, turning a single project into a scalable platform with recurring engineering and licensing benefits.
Deep Fission is positioned to capitalize on a structural shift in energy demand driven by the exponential growth of AI and data centers, which require massive, reliable, and low-carbon baseload power that intermittent renewables alone cannot provide. The company's Gravity Nuclear Reactor™ technology leverages proven pressurized water reactor (PWR) foundations—already deployed in hundreds of commercial nuclear plants worldwide—while innovating through deep underground deployment to enhance safety, reduce construction complexity, and accelerate scalability. This hybrid approach mitigates the regulatory and public perception hurdles that have historically slowed nuclear adoption, as burying the reactor one mile underground significantly reduces risks associated with surface-level accidents, seismic events, and terrorist threats, making it more palatable to regulators and local communities. With the U.S. Department of Energy selecting Deep Fission for its Reactor Pilot Program and the Parsons, Kansas project advancing toward construction, the company is transitioning from concept to tangible infrastructure, de-risking its technology pathway. The IPO proceeds of up to $156 million will directly fund engineering, R&D, licensing, and pilot construction, enabling Deep Fission to move faster than competitors reliant solely on above-ground SMR designs that face longer licensing timelines and higher capital intensity due to extensive containment structures and security measures. The market may be underestimating how this underground model could compress deployment timelines by years compared to traditional nuclear projects, potentially allowing Deep Fission to deliver its first commercial unit before 2030—a critical advantage as AI-driven electricity demand is projected to double U.S. data center power consumption by 2030, creating a multi-gigawatt addressable market for firm, clean power.
The current IPO valuation of approximately $1.66 billion implies a forward-looking multiple that may be conservative relative to the long-term value creation potential if Deep Fission successfully commercializes its Gravity Reactor™ at scale, particularly given the lack of direct pure-play nuclear SMR peers in the public market with comparable underground deployment advantages. While X-Energy’s post-IPO performance shows modest gains, Deep Fission’s technology differs fundamentally by eliminating the need for massive above-ground containment buildings and associated civil works, which typically account for 40-60% of total SMR capital costs. This cost structure advantage could translate into significantly lower levelized cost of electricity (LCOE) over the reactor’s lifetime, making it more competitive not only against fossil fuels but also against other SMRs requiring extensive surface infrastructure. The company’s targeting of utilities, industrial customers, and data centers aligns with high-credit, long-term off-takers capable of signing power purchase agreements (PPAs) that provide predictable revenue streams—essential for attracting project finance and de-risking future scaling. Furthermore, the Trump administration’s executive orders aimed at boosting domestic nuclear capacity and accelerating SMR deployment create a tailwind of potential federal loan guarantees, tax credits under the Inflation Reduction Act, and streamlined NRC licensing pathways, all of which could materially improve Deep Fission’s economics and timeline. The market may be overlooking how these policy tailwinds, combined with the company’s first-mover advantage in underground nuclear deployment, could enable rapid replication across multiple sites once the pilot is validated, turning a single project into a scalable platform with recurring engineering and licensing benefits.
Deep Fission operates in a capital-intensive, highly regulated industry with a history of cost overruns, licensing delays, and public skepticism, and its underground reactor concept introduces unproven technical and regulatory risks that management has not adequately addressed in its public disclosures. While the company asserts that its Gravity Nuclear Reactor™ leverages established pressurized water reactor (PWR) technology, placing a reactor one mile underground introduces novel challenges related to borehole stability, groundwater intrusion, seismic coupling, and long-term rock mechanics that have not been demonstrated at commercial scale, despite claims of drawing from existing PWR designs. The absence of a detailed technical roadmap or independent validation of underground reactor performance in the IPO materials raises concerns that the company may be overstating the readiness of its technology, particularly given that no pressurized water reactor has ever been deployed at such depths for power generation. Regulatory approval from the Nuclear Regulatory Commission (NRC) for an underground SMR is unprecedented, and the licensing process could face significant delays due to lack of precedent, potentially extending timelines by years and consuming far more capital than the $156 million IPO proceeds suggest—especially when considering that even conventional SMR projects like NuScale’s have faced multi-billion-dollar cost escalations and decade-long licensing struggles. The market may be ignoring how these unknowns could erode investor confidence if early milestones are missed, especially since the company has yet to demonstrate a functioning prototype or secure a full design certification from the NRC.
The company’s financial plan relies heavily on future project finance and customer contracts that are not yet secured, creating a significant execution risk that is not fully reflected in the current IPO valuation. Deep Fission states it will use IPO proceeds for general working capital, R&D, licensing, and pilot construction, but it has not disclosed any signed power purchase agreements (PPAs), memoranda of understanding (MOUs), or letters of intent from utilities, industrial clients, or data center operators—despite targeting these segments as primary customers. Without binding off-take agreements, the economic viability of the Parsons, Kansas pilot remains speculative, and the company risks developing a technology that cannot find commercial buyers at a price point that covers its elevated underground drilling and installation costs. Furthermore, the deep borehole drilling required for deployment introduces substantial upfront capital expenditure and technical risk, with costs highly dependent on geological conditions that vary significantly by site—potentially making replication in other locations far more expensive and unpredictable than implied by the company’s scalable narrative. The reliance on future government incentives, such as DOE loan guarantees or IRA tax credits, adds another layer of uncertainty, as these programs are subject to congressional appropriation, administrative changes, and eligibility criteria that may not favor Deep Fission’s specific technology or project location. If the company fails to secure these external funding sources or encounters higher-than-expected drilling and licensing costs, it could face severe liquidity pressure before achieving revenue, forcing dilutive follow-on financings or strategic pivots that undermine the current IPO thesis.
Deep Fission operates in a capital-intensive, highly regulated industry with a history of cost overruns, licensing delays, and public skepticism, and its underground reactor concept introduces unproven technical and regulatory risks that management has not adequately addressed in its public disclosures. While the company asserts that its Gravity Nuclear Reactor™ leverages established pressurized water reactor (PWR) technology, placing a reactor one mile underground introduces novel challenges related to borehole stability, groundwater intrusion, seismic coupling, and long-term rock mechanics that have not been demonstrated at commercial scale, despite claims of drawing from existing PWR designs. The absence of a detailed technical roadmap or independent validation of underground reactor performance in the IPO materials raises concerns that the company may be overstating the readiness of its technology, particularly given that no pressurized water reactor has ever been deployed at such depths for power generation. Regulatory approval from the Nuclear Regulatory Commission (NRC) for an underground SMR is unprecedented, and the licensing process could face significant delays due to lack of precedent, potentially extending timelines by years and consuming far more capital than the $156 million IPO proceeds suggest—especially when considering that even conventional SMR projects like NuScale’s have faced multi-billion-dollar cost escalations and decade-long licensing struggles. The market may be ignoring how these unknowns could erode investor confidence if early milestones are missed, especially since the company has yet to demonstrate a functioning prototype or secure a full design certification from the NRC.
The company’s financial plan relies heavily on future project finance and customer contracts that are not yet secured, creating a significant execution risk that is not fully reflected in the current IPO valuation. Deep Fission states it will use IPO proceeds for general working capital, R&D, licensing, and pilot construction, but it has not disclosed any signed power purchase agreements (PPAs), memoranda of understanding (MOUs), or letters of intent from utilities, industrial clients, or data center operators—despite targeting these segments as primary customers. Without binding off-take agreements, the economic viability of the Parsons, Kansas pilot remains speculative, and the company risks developing a technology that cannot find commercial buyers at a price point that covers its elevated underground drilling and installation costs. Furthermore, the deep borehole drilling required for deployment introduces substantial upfront capital expenditure and technical risk, with costs highly dependent on geological conditions that vary significantly by site—potentially making replication in other locations far more expensive and unpredictable than implied by the company’s scalable narrative. The reliance on future government incentives, such as DOE loan guarantees or IRA tax credits, adds another layer of uncertainty, as these programs are subject to congressional appropriation, administrative changes, and eligibility criteria that may not favor Deep Fission’s specific technology or project location. If the company fails to secure these external funding sources or encounters higher-than-expected drilling and licensing costs, it could face severe liquidity pressure before achieving revenue, forcing dilutive follow-on financings or strategic pivots that undermine the current IPO thesis.