Sections
1. Investment Snapshot
2. Thesis
3. Valuation & Price Target
4. Business & Product Moat
5. People & Governance
6. Market & Macro
7. Financial Quality
8. Risk Register
9. Prediction Market
10. 𝕏 Posts
Discussion
Investment Snapshot
Thesis
Valuation & Price Target
Business & Product Moat
People & Governance
Market & Macro
Financial Quality
Risk Register
Prediction Market
𝕏 Posts
Discussion
DEEP FISSION, INC.
Investment Snapshot
Symbol
FISN
Offer Range
—
Shares Offered
6.0M
Total Shares Post-IPO
69.9M
Market Cap
—
Target Price
$00.00Implied Upside vs Midpoint
$00.00Use of Proceeds
Working capital and corporate purposes, including engineering, R&D, NRC licensing activities and construction of the company’s first pilot reactor and related technologies.
Deep Fission, Inc. (FISN) is conducting an IPO on NASDAQ aiming to raise approximately $150 million at a $1.6 billion implied valuation. The company develops a novel small modular pressurized-water reactor designed for deep subsurface emplacement. Target customers include hyperscale data centers, utilities, heavy industry, and government entities. The commercialization plan is phased, starting with a DOE pilot reactor followed by scaled multi-reactor deployments. The offering involves 6 million shares at an assumed $25 midpoint price.
Strengths
+
X Twitter sentiment: Neutral — Deep Fission’s IPO for AI-driven nuclear energy solutions is attracting attention with a $150M raise and $1.6B valuation, but market sentiment remains neutral amid cautious investor interest.Observations
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Pre-revenue early-stage nuclear technology company○
Primary customers: data centers, utilities, heavy industry, government○
Commercialization via phased DOE pilot and later cluster deployments○
IPO raise approx. $150 million with $1.6 billion implied valuationThesis
Valuation Verdict: At the illustrative $25.00 midpoint the company would carry an implied market capitalization of roughly $1.6B despite being pre‑revenue and pre‑commercial, reflecting a high, milestone‑driven premium priced for successful DOE pilot outcomes, NRC licensing and large project financings. The valuation therefore trades more on optionality around the Gravity Reactor concept and addressable AI data‑center demand than on any current fundamentals.
Catalyst Timeline: Near‑term catalysts center on delivery and results from the DOE pilot program and the company’s planned pilot reactor construction over the next 12–36 months, with NRC licensing progress and early offtake or developer partnerships representing medium‑term triggers. Material catalysts that would meaningfully re‑rate the company include demonstrable borehole drilling success, pilot operational data, and formal NRC engagement milestones.
Growth & Margin Trajectory: The firm plans a phased commercialization path combining project equity participation, upfront reactor delivery fees and recurring licensing O&M, which could produce attractive long‑run margins if scale and supply chains are secured; however, the business is capital‑intensive with long lead times and zero current revenue. Near‑term operating losses and substantial R&D and development capex will keep margins negative until multi‑unit clusters and stable licensing regimes are in place.
Governance & Operational Risk: Governance is founder‑centric with the CEO serving as Chair and close family linkage to the CTO, concentrating execution and technical decision risk in a small founder team; the filing also discloses restatements, material weaknesses in controls and an auditor going‑concern paragraph which amplify near‑term operational and reporting risk. Boutique placement agents listed as underwriters suggest a narrower institutional distribution and potentially thinner aftermarket liquidity, increasing execution and market‑structure risk for public investors.
Scenario Targets: Bull case: successful DOE pilot, favorable NRC engagement and early commercial offtakes lead to multi‑reactor cluster contracts and re‑rating toward $3B+ enterprise value over several years. Base case: pilot execution with slower NRC timelines and modest early partnerships keeps public valuation near the offering level (~$1.6B) while additional capital raises dilute upside. Bear case: technical, regulatory or supply‑chain failures or prolonged delays lead to significant down‑rounds or writedowns and a market cap well below $1B within a few years.
Valuation premised on milestone-driven growth; no direct current revenue multiples.
Deep Fission targets a unique niche in advanced nuclear power by deploying compact SMRs deep underground to reduce footprint and regulatory hurdles, addressing increasing demand for low-carbon baseload power in data centers and heavy industry. The firm’s phased commercialization approach, including DOE pilot program participation, supports derisking the technology and market. The valuation reflects a high-risk, milestone-driven premium given the pre-revenue stage and technical uncertainties, with investor returns contingent on successful pilot, licensing, and financing progress.
Strengths
+
Strong alignment with U.S. government DOE pilot fundingRisks
−
Phased approach reduces technology and regulatory execution riskObservations
○
Novel gravity-driven SMR design reducing surface infrastructure and construction costs○
Targeting large, growing markets requiring reliable baseload power○
Valuation implies substantial upside but high technical and regulatory riskValuation & Price Target
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Milestone-driven valuation; no direct revenue multiples available.
The implied post-money valuation is approximately $1.6 billion, pricing Deep Fission at a substantial premium relative to traditional nuclear OEMs given its pre-revenue, unproven technology status. Unlike public peers with revenue or commercial projects, no direct forward EV revenue or EV EBITDA multiples are disclosed. The valuation is milestone-driven, reflecting expectations of successful DOE pilot completion, NRC licensing, and capital raising for commercial deployments.
Strengths
+
No current revenue multiples; valuation based on growth and milestones+
Positioned at premium vs. established nuclear OEMs with commercial revenuesRisks
−
Market prices significant risk premium for early-stage, scalable nuclear techObservations
○
Implied $1.6B valuation on approx. 63.9M shares at $25 per share○
Valuation depends critically on successful regulatory and technical milestonesBusiness & Product Moat
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Company Description (Source)
Deep Fission, Inc. (“Deep Fission”) is a nuclear energy technology company
developing a small modular reactor (“SMR”) based on established pressurized
water reactor (“PWR”) technology, with novel emplacement in deep boreholes
approximately one mile below the Earth’s surface. Our reactor, which we refer to
as the Gravity Reactor, will leverage subsurface conditions to support key
containment and operating functions, including the use of hydrostatic pressure
from a water column within the borehole to support reactor operating pressure
and cooling, and the surrounding geological formation to provide structural
confinement and shielding. This approach is intended to reduce reliance on large
surface containment structures and other safety-related infrastructure
associated with conventional nuclear power plants, support faster deployment
timelines, improve security, enhance safety, and enable lower capital and
operating costs relative to conventional nuclear facilities, while reducing
exposure to environmental and other surface-level hazards.
Each 3x3 Gravity Reactor is targeted to produce up to 15 megawatts of electric
power output (“MWe”). Individual reactors may be deployed as standalone
installations or grouped in clusters of boreholes at a single site, which may
enable longer refueling cycles through coordinated fuel management, staggered
refueling schedules and more efficient utilization of shared infrastructure, and
support larger installations capable of supplying hundreds and potentially
thousands of MWe of generation capacity.
Our commercialization strategy is based on a phased deployment plan designed to
move toward commercialization in the next three years. Given that reactor
criticality using established PWR technology is well understood, we are
prioritizing validation of the hardest and most differentiated parts of our
system, to reduce risk earlier and move more directly toward a commercialization
outcome. Our key demonstration objectives include drilling to depth at
commercial scale, installing and integrating a nuclear system a mile
underground, and operating as part of a complete energy ecosystem. Critically,
we aim to prove that each of these milestones can be achieved on a timeline
sufficient to meet the AI-driven surge in demand for energy. We are currently
participating in the U.S. Department of Energy (“DOE”) Reactor Pilot Program and
expect to demonstrate our system as part of that program.
The first phase of our phased deployment plan involves engineering validation
and proof of concept wells. We have a long-term lease for approximately 100
acres located within the Great Plains Industrial Park in Parsons, Kansas (the
“Kansas Site”) and have commenced initial field development activities at the
site. As part of this phase, we have already drilled our first data acquisition
well to gather real-world data up to 6,000 feet deep. Next, we will demonstrate
our ability to drill a commercial-scale borehole and safely deploy a prototype
reactor. We continue to advance our reactor design in parallel with these
activities, including planning additional drilling activities and conducting
related engineering and emplacement work, and we are targeting completion of
these activities in the coming months. The balance of this year and into early
2027 will be focused on the delivery of key components for full-system
installation, including well casing, our reactor canister, and heat exchanger,
as well as LEU fabrication and loading.
The second phase of our phased deployment plan involves DOE authorization and
one or more commercial pilot wells. Specifically, subject to DOE authorization,
we intend to demonstrate the Gravity Reactor, and to apply for a commercial
license with the U.S. Nuclear Regulatory Commission (“NRC”) in the first half of
2027, converting the same pilot reactor to commercial operation. We are working
closely with both the DOE and the NRC to align demonstration and licensing, as
we are aiming to move these efforts forward together rather than advancing them
in sequence.
The third and final phase of our phased deployment plan involves the
construction of surface facilities and seeking high-volume commercial licensing
for deployment of multiple reactors at a single site through clustered
boreholes, and subsequently, at multiple sites. We are targeting as early as
2027 to seek such high-volume commercial licensing with the NRC, and anticipate
a one-year lag between the start of construction and revenue recognition.
Our approach to subsurface reactor deployment is supported by our intellectual
property portfolio, which includes issued patents and pending patent
applications relating to reactor configuration, deep subsurface emplacement,
drilling and casing techniques, thermal-hydraulic performance, instrumentation
and monitoring, and other technologies supporting the deployment of underground
nuclear reactors. We believe that our intellectual property, together with our
engineering expertise and ongoing development activities, supports our
competitive position.
Legacy Deep Fission was incorporated in July 2023 and remains in the development
stage. The Gravity Reactor remains in conceptual and early engineering stages,
and we have not constructed or operated a commercial reactor or generated
revenue. Current activities include reactor development, geological evaluation,
large-diameter borehole drilling research and development, geothermal testing,
safety analysis, regulatory engagement, site development, and commercialization
planning.
---
We were incorporated as Surfside Acquisition Inc. (“Surfside”) in the State of
Delaware on December 10, 2021. Prior to the Merger (as defined below), we were a
“shell company”. On September 5, 2025 (the “Merger Closing Date”), Surfside
completed a merger (the “Merger”) with Deep Fission Nuclear, Inc. (formerly
known as Deep Fission, Inc.), a private Delaware corporation (“Legacy Deep
Fission”), pursuant to an Agreement and Plan of Merger and Reorganization (the
“Merger Agreement”), under which a wholly owned subsidiary of Surfside merged
with and into Legacy Deep Fission, with Legacy Deep Fission continuing as the
surviving corporation and becoming a wholly owned subsidiary of Surfside. In
connection with the transaction, Surfside changed its name to Deep Fission, Inc.
For financial reporting purposes, the transaction was treated as a
recapitalization and reverse acquisition, with Legacy Deep Fission considered
the accounting acquirer.
Our principal executive offices are located at 2001 Addison St., Suite 300,
Berkeley, California 94704. Our telephone number is (707) 400-0778. Our website
address is www.deepfission.com.
Competitor Set
████████████████████People & Governance
Elizabeth A. Muller
Chair; President and Chief Executive Officer
As founder-CEO and Chair, Muller is a central execution node and a key-person risk: her leadership credibility and fundraising ability materially affect the company's ability to execute the pilot and early commercialization milestones. Her dual CEO Chair role concentrates control and makes her performance highly valuation-relevant. Strengths: Identified in the filing as President, Chief Executive Officer and Chair of the board; presented as the primary executive leading commercialization and fundraising efforts; cited involvement in the DOE pilot engagement; family linkage to the CTO (Richard A. Muller) suggests tight founder-technical alignment which may speed decision-making and continuity in R&D. Weaknesses: Targeted public searches did not surface adverse items.
Richard A. Muller
Chief Technology Officer
As CTO and named technical founder figure, Richard Muller's technical credibility is central to mitigating technology risk and to investor confidence in the Gravity Reactor design and R&D pathway. His presence reduces some technical execution uncertainty but also concentrates technical authority within the founder group. Strengths: Identified in the prospectus as the company's CTO and linked to the Gravity Reactor design; noted as providing technical leadership over reactor design and R&D; close alignment with the CEO may support coherent technical-commercial strategy and faster iterative development. Weaknesses: Targeted public searches did not surface adverse items.
Leslie Goldman Tepper
Director (Class I)
Brings early-stage investing and legal experience that is relevant to licensing, governance and capital formation—skills that can help navigate DOE NRC interactions and investor relations during the pre-revenue, milestone-driven phase. Strengths: Filing identifies her as founder and former General Partner of The Artemis Fund with board experience (including Deep Isolation); background in early-stage investing and legal investor networks relevant to capital formation and governance. Weaknesses: Targeted public searches did not surface adverse items.
Jonathon Angell
Director (Class II)
Offers finance and audit credibility on the board, which supports capital markets execution and financial governance during rapid fundraising and reporting transitions. That background is valuation-relevant for reducing financing and reporting execution risk. Strengths: Former CFO and Strategic Advisor to Deep Fission per the filing; CEO of Angell Investments; CPA credential and cited audit committee board leadership experience in the prospectus. Weaknesses: Targeted public searches did not surface adverse items.
Blake E. Janover
Director (Class I)
Experience in capital formation and public company leadership is useful for shepherding the company through the IPO and subsequent public-company obligations, reducing listing execution risk. Strengths: Identified in the filing as founder and CEO of J2 Labs Inc.; filing highlights public company leadership and IPO experience; serves as chair of the compensation committee. Weaknesses: Targeted public searches did not surface adverse items.
Thomas S. Glanville
Director (Class II); Audit Committee Chair
Brings audit, energy-sector advisory and committee oversight experience that bolsters board-level oversight of financial reporting and sector-specific stakeholder engagement—important given the company's material weaknesses and restatements. Strengths: Filing identifies him as managing partner of Eschelon Advisors with extensive energy and audit committee experience; cited as Chair of Deep Fission’s Audit Committee in the prospectus. Weaknesses: Targeted public searches did not surface adverse items.
Leadership is founder-led, with Elizabeth A. Muller as Chair, President, and CEO, supported closely by CTO Richard A. Muller, her father and chief technical founder. The management team is tightly aligned with technical and commercial strategy. The board comprises directors with backgrounds in early-stage investing, audit, energy, and capital formation, providing relevant oversight. The CEO’s dual role as Chair concentrates governance control, requiring investors to trust her execution. No adverse governance issues were identified in public sources.
Strengths
+
Board mix includes expertise in investing, audit, energy, and capital marketsObservations
○
Elizabeth Muller: founder-CEO and Chair, central to execution and control○
Richard Muller: CTO and technical founder, key to R&D credibility○
Tight family technical and executive alignment supports cohesion○
No public governance red flags detected in background checksMarket & Macro
While the filing does not disclose TAM, Deep Fission targets sectors with growing low-carbon baseload needs, including hyperscale data centers and industrial power users. The nuclear SMR market is driven by rising electricity demand, decarbonization policies, and government support such as the DOE Reactor Pilot Program. External sources estimate advanced nuclear and SMR markets growing with significant future potential, albeit with regulatory and capital challenges. Industry CAGR is not explicitly reported but tailwinds include increasing data center power demand and stringent emissions targets.
○
TAM not disclosed in filing; external estimate unavailable for company-specific tech○
Target end markets: hyperscale data centers, utilities, heavy industry, government○
Growing demand for reliable, low-carbon baseload power solutions○
U.S. government support via DOE pilot participation accelerates validation○
Challenges include regulatory approval, capital intensity, and supply chain constraintsFinancial Quality
Pre-revenue with cash build from financing; negative margins reflect R&D phase.
Deep Fission is pre-revenue and early stage, investing heavily in R&D and pilot deployment. Operating losses have increased substantially, from $5.7 million in 2024 to $61 million projected in 2025 with a net loss of $21 million in Q1 2026. Cash balances rose sharply due to financing activities, including a recent private placement. The company’s cash runway extends with IPO proceeds, but margins are currently negative reflecting high development costs without revenue. Financial controls have known material weaknesses, indicating governance risks.
Risks
−
Material weaknesses in financial controls and auditor going-concern noteObservations
○
Pre-revenue lifecycle with no commercial sales reported○
Net losses expanding with increased R&D and operational spend○
Pro forma cash post-IPO estimated at ~$220 million provides extended runway○
Fiscal 2025 operating expenses exceed $21 million quarterly run rateRisk Register
Gravity Reactor technical risk: The subsurface emplacement concept is unproven at pilot or commercial scale and depends on successful deep borehole drilling, long‑term borehole integrity and integration of surface energy extraction systems.
Regulatory sequencing risk: DOE pilot participation does not replace NRC licensing and extended or adverse NRC outcomes would materially delay commercialization and revenue realization.
Supply‑chain and funding risk: Heavy capital intensity, constrained nuclear‑grade fabrication fuel‑cycle capacity and the need for multiple future financing rounds create execution and dilution risk if project economics or partner commitments falter.
Key risks include technological execution challenges with an unproven deep borehole reactor design; regulatory risks from uncertain NRC licensing and long approval timelines; capital intensity requiring substantial future financing; and supply chain complexities for nuclear-grade components. Additional risks stem from limited institutional investor demand suggested by boutique underwriters and material weaknesses in financial and operational controls, which may impact execution and disclosure quality.
Risks
−
Unproven Gravity Reactor technology and borehole drilling risks−
Regulatory risk: NRC licensing required beyond DOE pilot programs−
High capital needs and uncertain timing for project financing−
Limited broad institutional investor reach due to boutique underwritersObservations
○
Nuclear supply chain constraints and reliance on third-party vendors○
Material weaknesses in financial controls and audit concernsPrediction Markets
Market Cap Probabilities (Report)
Sum: 97%
Peak:
$23.24($1.6B)Mean:
$25.05($1.8B)Median:
$23.24($1.6B)R²=1.00
Resolution Details
This market will resolve based on Deep Fission's market capitalization at the closing price on its first day of trading.
As of market creation, the IPO is scheduled to price on May 29 (ET). If no such IPO occurs by July 31, 2026, 11:59 PM ET, the market will resolve to "No IPO before August 2026".
Market capitalization expresses the monetary value of a company's outstanding shares, stated in its pricing currency.
It is calculated as the total number of outstanding shares, multiplied by the official closing share price of the publicly traded class on the first trading day.
If necessary, to accurately capture the company's total market capitalization, rather than a stock-class-specific market capitalization, the calculation will include all outstanding share classes and apply any stated conversion ratios to the publicly traded class. Where no conversion right exists, such shares will be counted at their stated outstanding amount without discount, unless official filings explicitly specify differently.
The number of outstanding shares will be determined from official company filings or disclosures (e.g., SEC filings). The closing share price on the first trading day will be determined from the primary exchange's official listing page.
If the relevant value falls exactly between two brackets, this market will resolve to the higher range bracket.
The primary resolution source for this market will be official company filings and the primary exchange's official listing page. The market capitalization will be determined through appropriate calculation using the total outstanding shares and the closing price from the first day of trading.
In the event of an interruption in the normal trading session on the specified company's first day of trading (e.g., a circuit breaker or half-day), the market will resolve according to the official closing price of the abbreviated session. If no such official closing price is published, the market will resolve according to the next trading day on which an official closing price is published, treating that day as the first day of trading for the purposes of this market.
𝕏 Posts
X/Twitter sentiment
Neutral
Score 0
3 posts
Deep Fission’s IPO for AI-driven nuclear energy solutions is attracting attention with a $150M raise and $1.6B valuation, but market sentiment remains neutral amid cautious investor interest.
AI per-post analysis: 0 positive, 0 negative, 3 neutral (engagement-weighted aggregate).𝗗𝗘𝗘𝗣 𝗙𝗜𝗦𝗦𝗜𝗢𝗡 𝗧𝗔𝗥𝗚𝗘𝗧𝗦 𝗠𝗔𝗬 𝟮𝟵 𝗜𝗣𝗢 𝗔𝗦 𝗔𝗜-𝗗𝗥𝗜𝗩𝗘𝗡 𝗡𝗨𝗖𝗟𝗘𝗔𝗥 𝗧𝗛𝗘𝗠𝗘 𝗚𝗔𝗜𝗡𝗦 𝗠𝗢𝗠𝗘𝗡𝗧𝗨𝗠 FISN
Deep Fission is seeking to raise approximately $150M at a valuation near $1.6B as investor interest in next-generation nuclear infrastructure and AI-related power demand continues accelerating.
The company’s “Gravity Reactor” concept aims to place small modular nuclear reactors roughly one mile underground using deep borehole technology.
The offering is expected to begin trading Friday, May 29 on Nasdaq.
Full IPO Prophet coverage:
https://t.co g00nyyUkrA
#IPO #IPOs #NuclearEnergy #AI #Energy #DataCenters #SMR #Nuclear
♥ 1⟲ 0💬 0👁 406
May 27, 2026FISN (NYSE) expected today
6mln shares at $24-26
underwriters: BofA Securities, Morgan Stanley, Canaccord Genuity
Nuclear startup Deep Fission is developing underground small modular reactors as AI data centers drive demand for reliable power.
#ipo
♥ 3⟲ 0💬 0👁 253
May 29, 2026Today US market IPO 🔥🔥🔥 https://t.co o00KLKCe3O
Deep Fission Inc. adalah startup teknologi energi nuklir asal California, Amerika Serikat, yang didirikan pada tahun 2023 oleh pasangan ayah-anak, Richard dan Elizabeth Muller. Perusahaan ini sedang menjadi sorotan global karena mengajukan penawaran umum perdana (IPO) di bursa Nasdaq senilai $156 juta dengan target valuasi mencapai $1,66.
Sektor utama yang dibidik oleh Deep Fission adalah penyediaan energi bersih berkapasitas besar untuk pusat data kecerdasan buatan (AI data centers) dan industri skala besar yang membutuhkan pasokan listrik tanpa henti.
Berikut adalah poin-poin penting mengenai teknologi, proyek, dan risiko dari Deep Fission Inc.
Teknologi Gravity Nuclear Reactor™
Inovasi utama mereka adalah menempatkan reaktor nuklir modular kecil (SMR) di dalam lubang bor (borehole) sedalam 1 mil (sekitar 1,6 kilometer) di bawah permukaan bumi.
Memangkas Biaya Struktur: Sekitar 80% biaya PLTN konvensional habis untuk membangun struktur beton penahan tekanan di permukaan. Deep Fission memanfaatkan formasi batuan alami bawah tanah sebagai wadah pengungkung radiasi alami.
Tekanan Hidrostatik Alami: Kolom air sedalam 1 mil menghasilkan tekanan alami sebesar 160 atm. Tekanan luar biasa ini mendinginkan dan menjaga stabilitas reaktor air bertekanan (PWR) secara pasif tanpa memerlukan pompa eksternal raksasa.
Bahan Bakar Konvensional: Reaktor berdiameter 30 inci ini dirancang menghasilkan daya sekitar 15 Megawatt (MW) menggunakan uranium dengan pengayaan rendah (LEU 5%), jenis bahan bakar standar yang sudah dipahami regulasinya.
Proyek Pilot di Kansas
Deep Fission telah bermitra dengan Departemen Energi AS (DOE) dalam Nuclear Reactor Pilot Program.
Lokasi: Mereka telah melakukan peletakan batu pertama (groundbreaking) di Great Plains Industrial Park di Parsons, Kansas, untuk mengebor sumur akuisisi data pertama mereka.
Komersialisasi: Di masa depan, perusahaan berencana menggelar susunan reaktor bawah tanah ini untuk menghasilkan daya hingga ukuran Gigawatt, termasuk rencana kemitraan dengan pengembang pusat data seperti Endeavor.
♥ 0⟲ 0💬 2👁 21
May 29, 2026