Security
FISN · DEEP FISSION, INC.
FISNNASDAQCommon stockCurrentCIK 1918102Updated Sep 24, 2026
Name history
Surfside Acquisition Inc. · through Sep 8, 2025
FISN price & chart
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NASDAQ:FISN on TradingView ↗About the company
Deep Fission, Inc. (“Deep Fission,” the “Company,” “we,” “our,” or “us”) 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.
In the news
No coverage from other publishers is available.
Recent filings
Regulation FD Disclosure
Items 7.01, 9.01
10-Q filing
Other Events
Items 8.01, 9.01
4 filing
S-8 filing
Show 5 more recent filings
Financials
FY 2025 · USDSource
Source
Source
Source
balance sheet · annual statements
| Line item | FY 2025 | FY 2024 | FY 2023 | FY 2022 |
|---|---|---|---|---|
| ASSETS | ||||
| AssetsUSD | 24,691,085Source | 3,464Source | 774Source | 69Source |
| Property, Plant and Equipment, NetUSD | 37,102Source | 1,993Source | — | — |
| Current assets: | ||||
| Cash and Cash Equivalents, at Carrying ValueUSD | 23,719,422Source | — | — | 69Source |
| Assets, CurrentUSD | 24,432,576Source | 3,464Source | 774Source | 69Source |
| Prepaid Expense and Other Assets, CurrentUSD | 713,154Source | — | — | — |
| LIABILITIES AND EQUITY | ||||
| LiabilitiesUSD | 2,403,972Source | 157,725Source | 110,225Source | 61,895Source |
| Stockholders’ equity: | ||||
| Common Stock, Value, IssuedUSD | 5,110Source | 500Source | 500Source | 500Source |
| Additional Paid in CapitalUSD | 89,009,102Source | — | — | — |
| Retained Earnings (Accumulated Deficit)USD | -66,727,099Source | -154,761Source | -109,951Source | -62,326Source |
| Stockholders' Equity Attributable to ParentUSD | 22,287,113Source | -154,261Source | -109,451Source | -61,826Source |
| Liabilities and EquityUSD | 24,691,085Source | 3,464Source | 774Source | 69Source |
| Current liabilities: | ||||
| Liabilities, CurrentUSD | 2,403,972Source | 157,725Source | 110,225Source | 61,895Source |
| Accounts Payable, CurrentUSD | 538,270Source | — | — | 9,352Source |
| Additional Financial Items | ||||
| Accrued Liabilities, CurrentUSD | 185,164Source | — | — | — |
cash flow · annual statements
| Line item | FY 2025 | FY 2024 | FY 2023 | FY 2022 |
|---|---|---|---|---|
| Cash flows from operating activities: | ||||
| Net Income (Loss), Including Portion Attributable to Noncontrolling InterestUSD | -61,002,954Source | — | — | — |
| Adjustments to reconcile net income to net cash provided by operating activities: | ||||
| Share-based Payment Arrangement, Noncash ExpenseUSD | 8,424,803Source | — | — | — |
| Changes in operating assets and liabilities: | ||||
| Increase (Decrease) in Accounts PayableUSD | 443,473Source | — | — | — |
| Deferred Income Tax Expense (Benefit)USD | 0Source | — | — | — |
| Net Cash Provided by (Used in) Operating ActivitiesUSD | -13,051,195Source | -44,810Source | -46,277Source | -40,056Source |
| Cash flows from investing activities: | ||||
| Net Cash Provided by (Used in) Investing ActivitiesUSD | -43,436Source | — | — | — |
| Payments to Acquire Property, Plant, and EquipmentUSD | 43,436Source | — | — | — |
| Cash flows from financing activities: | ||||
| Net Cash Provided by (Used in) Financing ActivitiesUSD | 30,085,158Source | 47,500Source | 46,982Source | 40,125Source |
| Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate EffectUSD | 16,990,527Source | — | — | — |
| Cash, Cash Equivalents, Restricted Cash and Restricted Cash EquivalentsUSD | 23,719,422Source | 3,464Source | 774Source | 69Source |
| Additional Financial Items | ||||
| Share-based Payment Arrangement, ExpenseUSD | 8,424,803Source | — | — | — |
| DepreciationUSD | 8,327Source | — | — | — |
| Derivative, Gain (Loss) on Derivative, NetUSD | -39,834,049Source | — | — | — |
| General and Administrative ExpenseUSD | 14,766,607Source | 44,810Source | 47,625Source | 49,408Source |
| Investment Income, InterestUSD | 210,987Source | — | — | — |
| Net Income (Loss) Attributable to ParentUSD | -61,002,954Source | -44,810Source | -47,625Source | -49,408Source |
| Nonoperating Income (Expense)USD | -39,618,785Source | — | — | — |
| Operating ExpensesUSD | 21,384,169Source | — | — | — |
| Other Nonoperating Income (Expense)USD | 4,277Source | — | — | — |
| Proceeds from Issuance of Common StockUSD | 30,000,000Source | — | — | — |
income statement · annual statements
| Line item | FY 2025 | FY 2024 | FY 2023 | FY 2022 |
|---|---|---|---|---|
| Operating Income (Loss)USD | -21,384,169Source | -44,810Source | -47,625Source | -49,408Source |
| Other Nonoperating Income (Expense)USD | 4,277Source | — | — | — |
| Net Income (Loss) Attributable to ParentUSD | -61,002,954Source | -44,810Source | -47,625Source | -49,408Source |
| Earnings Per Share, BasicUSD per share | -2.41Source | -0.01Source | -0.01Source | -0.01Source |
| Earnings Per Share, DilutedUSD per share | — | -0.01Source | -0.01Source | 0Source |
| Weighted Average Number of Shares Outstanding, Basicshares | 25,332,277Source | 5,000,000Source | 5,000,000Source | 5,000,000Source |
| Weighted Average Number of Shares Outstanding, Dilutedshares | — | 5,000,000Source | 5,000,000Source | 5,000,000Source |
| Additional Financial Items | ||||
| Current Income Tax Expense (Benefit)USD | 825Source | — | — | — |
| General and Administrative ExpenseUSD | 14,766,607Source | 44,810Source | 47,625Source | 49,408Source |
| Investment Income, InterestUSD | 210,987Source | — | — | — |
| Nonoperating Income (Expense)USD | -39,618,785Source | — | — | — |
| Operating ExpensesUSD | 21,384,169Source | — | — | — |
| Research and Development ExpenseUSD | 6,617,562Source | — | — | — |
Offerings
Registration 333-296043
- Gross proceeds
- 40000000.0
- Net proceeds
- 37200000.0
- Deal price
- 16.0
- Shares
- 2500000
- Offering price
- $16.00
- Ticker
- FISN
Registration 333-293510
Filing attachments
tm2625786d1_ex99-1.htm · 8-K · 2026-09-21
Exhibit 99.1 Deep Fission and Youngquist Brothers Announce Collaboration on Deep, Large-Diameter Borehole Drilling for Underground Nuclear Reactor Deployment - - Companies will jointly evaluate and test drilling and borehole-construction methods to support Deep Fission's underground reactor technology -- Fort Myers, Fla. - September 21, 2026 - Deep Fission, Inc. (Nasdaq: FISN) (“Deep Fission” or the “Company”), an advanced nuclear energy company working to place small modular pressurized wate…
Read attachment ↗tm2612289d1_ex99-1.htm · 8-K · 2026-04-22
EX-99.1 2 tm2612289d1_ex99-1.htm EXHIBIT 99.1 Exhibit 99.1 Deep Fission, Inc. Confidentially Submits Draft Registration Statement for Primary Offering Berkeley, CA - April 22, 2026 - Deep Fission, Inc. (“Deep Fission” or the “Company”), an advanced nuclear energy company developing small modular pressurized water reactors installed one mile underground, announced that it has confidentially submitted a draft registration statement on Form S-1 with the Securities and Exchange Commission (the…
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