Deep Fission Eyes $152.6M Offering Amidst Novel Reactor Push

TL;DR

**Deep Fission's S-1 is a high-stakes bet on unproven subsurface nuclear tech, offering a speculative entry into a pre-commercial venture with no immediate liquidity.**

AI Summary

Deep Fission, Inc. is offering up to 51,460,755 shares of common stock through selling stockholders, comprising 10,000,000 PIPE Shares from a September 5, 2025 private placement, 586,666 Warrant Shares, 38,538,922 Merger Shares from a reverse subsidiary merger on September 5, 2025, 2,166,667 Retained Pre-Merger Shares, 85,000 Advisor Shares, and 83,500 Consultant Shares. The total offering amount is $152,622,267, based on a fixed price of $3.00 per share for initial sales. The company will not receive proceeds from the sale of shares by selling stockholders, except from the exercise of Placement Agent Warrants. Deep Fission's core business involves a novel pressurized water reactor (PWR) design, the 'Deep Fission Reactor,' which is emplaced 1-mile below the Earth's surface, leveraging natural containment and pressure from borehole water to reduce plant costs. There is currently no public trading market for its securities, and the company intends to apply for quotation on the OTCQB or another OTC system. As an 'emerging growth company' and 'smaller reporting company,' Deep Fission benefits from reduced public company reporting requirements. The S-1 filing highlights significant risks associated with an emerging, highly regulated market with no commercial projects operating as of the registration statement date.

Why It Matters

This S-1 filing signals Deep Fission's intent to bring its innovative subsurface nuclear reactor technology to a broader market, potentially disrupting the energy sector with a cost-effective and naturally contained PWR design. For investors, the offering of 51,460,755 shares at a fixed price of $3.00 per share represents an opportunity in a highly speculative, pre-commercial nuclear energy venture. Employees and customers could benefit from a new player in the energy transition, though the lack of a public trading market and commercial projects introduces significant uncertainty. The competitive landscape for nuclear energy is dominated by established players, making Deep Fission's novel approach a high-risk, high-reward proposition.

Risk Assessment

Risk Level: high — The risk level is high due to several factors cited in the S-1 filing. There is currently no established public trading market for Deep Fission's securities, and the company cannot assure that its common stock will become eligible for trading on any exchange or market. Furthermore, the company is pursuing an 'emerging, highly regulated market, with no commercial project operating as of the date of this registration statement,' indicating significant operational and regulatory hurdles.

Analyst Insight

Investors should approach Deep Fission with extreme caution, recognizing the pre-commercial stage and lack of a public trading market. This offering is suitable only for those with a high-risk tolerance and a long-term investment horizon, willing to speculate on the successful development and commercialization of novel nuclear technology. Consider the fixed $3.00 per share price as a floor, not a guarantee of future value.

Financial Highlights

debt To Equity

N/A

revenue

$0

operating Margin

N/A

total Assets

N/A

total Debt

N/A

net Income

N/A

eps

N/A

gross Margin

N/A

cash Position

N/A

revenue Growth

N/A

Key Numbers

• 51,460,755 — Shares of Common Stock (Total shares offered by selling stockholders)
• $152,622,267 — Total Offering Amount (Calculated based on 50,874,089 shares at $3.00 per share)
• 10,000,000 — PIPE Shares (Shares issued in the Private Placement on September 5, 2025)
• 586,666 — Warrant Shares (Shares issuable upon exercise of Placement Agent Warrants)
• 38,538,922 — Merger Shares (Shares issued to former Legacy Deep Fission stockholders on September 5, 2025)
• 2,166,667 — Retained Pre-Merger Shares (Shares held by Surfside Acquisition Inc. stockholders prior to the Merger)
• 85,000 — Advisor Shares (Shares issued to an advisor for services rendered in connection with the Merger)
• 83,500 — Consultant Shares (Shares issued to a consultant for services to be rendered following the Merger)
• 1-mile — Emplacement Depth (Depth below Earth's surface for the Deep Fission Reactor)
• 2025-09-19 — Filing Date (Date the preliminary prospectus was filed with the SEC)

Key Players & Entities

• DEEP FISSION, INC. (company) — Registrant and issuer of common stock
• Elizabeth Muller (person) — Chief Executive Officer of Deep Fission, Inc.
• Gordon Ho (person) — Counsel from Cooley LLP
• John T. McKenna (person) — Counsel from Cooley LLP
• Cooley LLP (company) — Legal counsel for Deep Fission, Inc.
• Securities and Exchange Commission (regulator) — Regulatory body for the S-1 filing
• Legacy Deep Fission (company) — Former entity in the reverse subsidiary merger
• Deep Fission Acquisition Co. (company) — Acquiring entity in the reverse subsidiary merger
• Surfside Acquisition Inc. (company) — Stockholders prior to the Merger
• $3.00 (dollar_amount) — Fixed price per share in the Private Placement and initial sales

FAQ

Risk Factors

• Unproven Technology and Market Adoption [high — regulatory]: The company's novel pressurized water reactor (PWR) design, the 'Deep Fission Reactor,' is emplaced 1-mile below the Earth's surface. There are no commercial projects operating as of the registration statement date, indicating a high degree of technological and market risk. The success of the business is contingent on the successful development, regulatory approval, and commercial adoption of this unproven technology.
• Extensive Regulatory Hurdles [high — regulatory]: The nuclear energy industry is subject to stringent and evolving regulations from various governmental agencies. Deep Fission, Inc. will face significant challenges in obtaining the necessary permits, licenses, and approvals for its novel reactor design. Delays or failures in the regulatory process could materially impact the company's ability to commercialize its technology.
• Dependence on Future Capital Raising [high — market]: The company has a history of operating losses and expects to incur significant expenses and operating losses in the future. Deep Fission, Inc. will require substantial additional capital to fund its research and development, regulatory approvals, and eventual commercialization. There is no guarantee that it will be able to secure such financing on acceptable terms, if at all.
• Execution and Scalability Risks [high — operational]: The company's business plan relies on the successful execution of complex engineering, construction, and operational plans for its subterranean reactors. Scaling this novel technology to commercial viability presents significant operational challenges, including managing construction costs, ensuring safety, and achieving efficient energy production.
• Limited Operating History and Profitability [medium — financial]: Deep Fission, Inc. has a limited operating history and has not generated significant revenue to date. The company has incurred net losses and expects to continue to incur net losses for the foreseeable future. This lack of established revenue streams and profitability poses a significant financial risk to investors.
• Competition from Established Energy Sources [medium — market]: The company will compete with established energy providers, including fossil fuels and existing nuclear power plants, as well as other emerging clean energy technologies. The cost-effectiveness and reliability of the Deep Fission Reactor will be critical factors in its ability to gain market share.
• Potential Litigation and Liability [medium — legal]: As a company operating in a high-risk industry with novel technology, Deep Fission, Inc. could face potential litigation related to its technology, operations, or environmental impact. Significant legal liabilities could adversely affect its financial condition and ability to operate.
• Dilution from Future Offerings [low — financial]: The company may need to raise additional capital through future equity offerings, which could dilute the ownership interests of existing stockholders. The current offering itself involves a significant number of shares from selling stockholders, indicating potential for future dilution.

Industry Context

Deep Fission, Inc. operates in the nascent advanced nuclear reactor sector, aiming to disrupt traditional energy markets with its novel subterranean PWR design. The industry is characterized by long development cycles, high capital requirements, and significant regulatory oversight. While there is growing interest in advanced nuclear for clean energy solutions, the sector faces challenges in demonstrating commercial viability and overcoming public perception.

Regulatory Implications

The company faces substantial regulatory hurdles inherent in the nuclear industry. Obtaining approvals for its unique subterranean reactor design from agencies like the Nuclear Regulatory Commission (NRC) will be a critical and potentially lengthy process. Failure to navigate these complex regulations could halt or significantly delay commercialization.

What Investors Should Do

1. Evaluate the technological feasibility and regulatory pathway for the 'Deep Fission Reactor'.
2. Assess the company's capital requirements and future financing needs.
3. Consider the long-term market adoption potential for subterranean nuclear reactors.
4. Review the terms of the current offering, particularly the role of selling stockholders.

Key Dates

• 2025-09-05: Private Placement and Reverse Subsidiary Merger — Significant corporate restructuring and capital infusion events that form the basis for the current share offering.
• 2025-09-19: Preliminary Prospectus Filing — Initiates the public offering process, providing detailed information to potential investors about the company and the offering.

Glossary

PIPE Shares

Shares issued as part of a Private Investment in Public Equity transaction. (Represents a significant portion of the shares being offered, indicating prior private investment.)

Warrant Shares

Shares that can be purchased by warrant holders at a specified price. (These shares are issuable upon exercise of Placement Agent Warrants, potentially increasing the total number of shares outstanding.)

Merger Shares

Shares issued to former stockholders of a company acquired through a reverse subsidiary merger. (Represents the shares of the original Deep Fission entity that are now part of the post-merger company.)

Retained Pre-Merger Shares

Shares held by the stockholders of the SPAC (Surfside Acquisition Inc.) prior to the merger. (These shares represent the ownership stake of the SPAC's original investors in the combined entity.)

Emerging Growth Company

A company with total annual gross revenues of less than $1.235 billion during its most recently completed fiscal year. (Allows Deep Fission, Inc. to benefit from reduced public company reporting requirements.)

Smaller Reporting Company

A non-accelerated filer that is also an emerging growth company or has a public float of less than $250 million. (Further reduces public company reporting obligations for Deep Fission, Inc.)

OTC Market

Over-the-Counter market, a decentralized market for trading securities. (The company intends to list its shares on the OTCQB or a similar system, indicating it will not initially trade on major exchanges like NYSE or Nasdaq.)

Pressurized Water Reactor (PWR)

A type of light-water nuclear reactor that uses a natural circulation of water in the primary coolant loop. (This is the core technology that Deep Fission, Inc. is developing, with a novel subterranean emplacement design.)

Year-Over-Year Comparison

As this is an S-1 filing for an initial public offering, there is no prior public filing to compare against. Key metrics such as revenue, net income, and operating margins are not yet established for a public company context. The S-1 filing outlines the company's pre-IPO structure, including recent private placements and a merger, and details the risks associated with bringing a novel, highly regulated technology to market.

Key Financial Figures

• $0.0001 — 0,755 shares of common stock, par value $0.0001 per share, of Deep Fission, Inc. (" Dee
• $3.00 — to this prospectus at a fixed price of $3.00 per share, the price per share in the P
• $152,622,267 — d above, for a total offering amount of $152,622,267. At and after such time, the selling st
• $8.0 million — no revenue, and incurred net losses of $8.0 million and $7.1 million, respectively, and as
• $7.1 m — incurred net losses of $8.0 million and $7.1 million, respectively, and as of December
• $8.7 million — , 2024 we had an accumulated deficit of $8.7 million. Our auditor issued a "going concern" o

Filing Documents

• ea0257750-s1_deep.htm (S-1) — 1715KB
• ea025775001ex5-1_deep.htm (EX-5.1) — 17KB
• ea025775001ex23-1_deep.htm (EX-23.1) — 2KB
• ea025775001ex23-2_deep.htm (EX-23.2) — 2KB
• ea025775001ex-fee_deep.htm (EX-FILING FEES) — 14KB
• image_001.jpg (GRAPHIC) — 5KB
• image_002.jpg (GRAPHIC) — 3KB
• ex23-2_001.jpg (GRAPHIC) — 7KB
• ex5-1_001.jpg (GRAPHIC) — 3KB
• 0001213900-25-089735.txt ( ) — 5571KB
• ssai-20250630.xsd (EX-101.SCH) — 52KB
• ssai-20250630_cal.xml (EX-101.CAL) — 32KB
• ssai-20250630_def.xml (EX-101.DEF) — 224KB
• ssai-20250630_lab.xml (EX-101.LAB) — 332KB
• ssai-20250630_pre.xml (EX-101.PRE) — 246KB
• ea0257750-s1_deep_htm.xml (XML) — 515KB
• ea025775001ex-fee_deep_htm.xml (XML) — 6KB

USE OF PROCEEDS

USE OF PROCEEDS 28 DIVIDEND POLICY 28 DETERMINATION OF SALE PRICE 28 MARKET INFORMATION FOR OUR COMMON STOCK AND DIVIDEND POLICY 28 DESCRIPTION OF BUSINESS 29

MANAGEMENT'S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS

MANAGEMENT'S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS 43 MANAGEMENT 50 COMPENSATION OF DIRECTORS AND EXECUTIVE OFFICERS 52 CERTAIN RELATIONSHIPS AND RELATED PARTY TRANSACTIONS 55

SECURITY OWNERSHIP OF CERTAIN BENEFICIAL OWNERS AND MANAGEMENT

SECURITY OWNERSHIP OF CERTAIN BENEFICIAL OWNERS AND MANAGEMENT 58 SELLING STOCKHOLDERS 59 PLAN OF DISTRIBUTION 68

DESCRIPTION OF CAPITAL STOCK

DESCRIPTION OF CAPITAL STOCK 71 LEGAL MATTERS 77 EXPERTS 77 CHANGE IN AUDITOR 77 WHERE YOU CAN FIND MORE INFORMATION 77 UNAUDITED PRO FORMA CONDENSED COMBINED FINANCIAL INFORMATION F-1 PART II II-1 INFORMATION NOT REQUIRED IN THE PROSPECTUS II-1 EXHIBIT INDEX II-5

SIGNATURES

SIGNATURES II-6 i ABOUT THIS PROSPECTUS General This prospectus is part of a registration statement on Form S-1 that we filed with the SEC using the "shelf" registration process. Under this shelf registration process, the selling stockholders may, from time to time, sell the securities offered by them described in this prospectus. We will not receive any proceeds from the sale by such selling stockholders of the securities offered by them described in this prospectus. This prospectus also relates to the issuance by us of the shares of common stock issuable upon the exercise of any Placement Agent Warrants. We will not receive any proceeds from the sale of shares of common stock underlying the Placement Agent Warrants pursuant to this prospectus, except with respect to amounts received by us upon the exercise of the Placement Agent Warrants for cash. You should rely only on the information contained in this prospectus, any supplement to this prospectus or in any free writing prospectus, filed with the Securities and Exchange Commission (the "SEC"). We have not, and the selling stockholders have not, authorized anyone to provide you with any additional information or information different from that contained in this prospectus, the information incorporated by reference herein, any applicable prospectus supplement or any free writing prospectus filed with the SEC. Neither we nor the selling stockholders take responsibility for, and can provide no assurances as to the reliability of, any other information that others may give you. Neither we nor the selling stockholders have authorized anyone to provide you with additional information or information different from that contained in this prospectus filed with the SEC. The selling stockholders are offering to sell, and seeking offers to buy, shares of our common stock only in jurisdictions where offers and sales are permitted. You should assume that the information appearing in this prospectus, any applicable pros

Forward-looking statements

Forward-looking statements include, but are not limited to, statements about:

Forward-looking statements

Forward-looking statements relate to future events or our future operational or financial performance. Our forward-looking performance or achievements to be materially and adversely different from any future results, performance or achievements expressed, anticipated, or implied by these forward-looking statements. Some of such risks, uncertainties, and assumptions are described in the section below titled " Risk Factors " and elsewhere in this prospectus, in any applicable prospectus supplement and in any related free writing prospectus. 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 and adversely from those in any express or implied forward-looking statements. Accordingly, you should not rely upon forward-looking statements as predictions of future events. The events and circumstances reflected in the forward-looking statements may not be achieved or occur. We base such statements largely on our current expectations and projections about future events and trends that we believe may affect our financial condition, operating results, business strategy, short-term and long-term business operations and objectives, and financial needs. Although we believe that the expectations reflected in the forward-looking statements are reasonable, we cannot guarantee future results, performance, or achievements. We undertake no obligation to update any of our forward-looking statements for any reason after the date of this prospectus, any applicable prospectus supplement, or any related free writing prospectus or to conform these statements to actual results or revised expectations, except as required by law. This prospectus contains,

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