Security
Deep Fission, Inc. Common Stock · FISN
FISNNASDAQCommon stockCurrentCIK 1918102Updated Nov 6, 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
DEEP FISSION, INC. (NASDAQ: FISN) INVESTIGATION: Johnson Fistel Investigates Potential Securities Claims Following Short-Seller Report ↗
Seeking Alpha
Deep Fission, Inc. (FISN) Discusses Commercial Nuclear Power Project Progress, Technology, and Regulatory Milestones Transcript ↗
Deep Fission signs 25-year power deal for planned Kansas nuclear project ↗
Deep Fission: The Reactor Is Promising, But The Cash Clock Is Ticking ↗
SEC disclosures
DEEP FISSION, INC. files 8-K: Material Event ↗
Recent filings
S-3 filing
10-Q filing
Regulation FD Disclosure
Items 7.01, 9.01
Regulation FD Disclosure
Items 7.01, 9.01
10-Q filing
Show 5 more recent filings
Financials
FY 2025 · USDSource
Source
Source
Source
balance sheet · annual statements
| Line item | Q3 2025 | Q3 2024 | Q2 2026 | Q2 2025 | Q2 2024 | Q1 2026 | Q1 2025 | Q1 2024 | FY 2025 | FY 2024 | FY 2023 | FY 2022 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| ASSETS | ||||||||||||
| AssetsUSD | 30,524,544Source | 2,069Source | 107,308,000Source | 11,027Source | 522Source | 92,030,714Source | 2,901Source | 10,183Source | 24,691,085Source | 3,464Source | 774Source | 69Source |
| Property, Plant and Equipment, NetUSD | 25,490Source | — | 101,000Source | — | — | 85,775Source | — | — | 37,102Source | — | — | — |
| Current assets: | ||||||||||||
| Cash and Cash Equivalents, at Carrying ValueUSD | 30,241,931Source | — | 93,016,000Source | — | — | 84,767,555Source | — | — | 23,719,422Source | — | — | 69Source |
| Assets, CurrentUSD | 30,499,054Source | 2,069Source | 97,769,000Source | 11,027Source | 522Source | 91,799,616Source | 2,901Source | 10,183Source | 24,432,576Source | 3,464Source | 774Source | 69Source |
| Prepaid Expense and Other Assets, CurrentUSD | 257,123Source | — | — | — | — | — | — | — | 713,154Source | — | — | — |
| LIABILITIES AND EQUITY | ||||||||||||
| LiabilitiesUSD | 605,325Source | 145,225Source | 8,553,000Source | 189,325Source | 132,725Source | 3,897,357Source | 168,425Source | 130,925Source | 2,403,972Source | 157,725Source | 110,225Source | 61,895Source |
| Stockholders’ equity: | ||||||||||||
| Common Stock, Value, IssuedUSD | 5,087Source | 500Source | 6,000Source | 500Source | 500Source | 5,661Source | 500Source | 500Source | 5,110Source | 500Source | 500Source | 500Source |
| Additional Paid in CapitalUSD | 86,100,946Source | — | 217,829,000Source | — | — | 176,198,242Source | — | — | 89,009,102Source | — | — | — |
| Retained Earnings (Accumulated Deficit)USD | -56,186,814Source | -143,656Source | -119,080,000Source | -178,798Source | -132,703Source | -88,070,546Source | -166,024Source | -121,242Source | -66,727,099Source | -154,761Source | -109,951Source | -62,326Source |
| Stockholders' Equity Attributable to ParentUSD | 29,919,219Source | -4,559,033Source | 98,755,000Source | -10,790,000Source | -132,203Source | 88,133,357Source | -7,186,709Source | -120,742Source | 22,287,113Source | -154,261Source | -109,451Source | -61,826Source |
| Liabilities and EquityUSD | 30,524,544Source | 2,069Source | 107,308,000Source | 11,027Source | 522Source | 92,030,714Source | 2,901Source | 10,183Source | 24,691,085Source | 3,464Source | 774Source | 69Source |
| Current liabilities: | ||||||||||||
| Liabilities, CurrentUSD | 605,325Source | 145,225Source | 8,525,000Source | 189,325Source | 132,725Source | 3,853,971Source | 168,425Source | 130,925Source | 2,403,972Source | 157,725Source | 110,225Source | 61,895Source |
| Accounts Payable, CurrentUSD | 213,211Source | — | 5,069,000Source | — | — | 2,181,025Source | — | — | 538,270Source | — | — | 9,352Source |
| Additional Financial Items | ||||||||||||
| Accrued Liabilities, CurrentUSD | 375,270Source | — | 1,094,000Source | — | — | 864,290Source | — | — | 185,164Source | — | — | — |
| Operating Lease, Right-of-Use Asset | — | — | —Source | — | — | —Source | — | — | — | — | — | — |
| Operating Lease, Liability, Current | — | — | —Source | — | — | —Source | — | — | — | — | — | — |
| Operating Lease, Liability, Noncurrent | — | — | —Source | — | — | —Source | — | — | — | — | — | — |
cash flow · annual statements
| Line item | Q4 2025 | Q4 2024 | Q3 2025 | Q3 2024 | Q2 2026 | Q2 2025 | Q1 2026 | Q1 2025 | FY 2025 | FY 2024 | FY 2023 | FY 2022 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Cash flows from operating activities: | ||||||||||||
| Net Income (Loss), Including Portion Attributable to Noncontrolling InterestUSD | — | — | — | — | — | — | -21,343,447Source | -3,136,887Source | -61,002,954Source | — | — | — |
| Adjustments to reconcile net income to net cash provided by operating activities: | ||||||||||||
| Share-based Payment Arrangement, Noncash ExpenseUSD | — | — | — | — | — | — | 10,384,851Source | 31,999Source | 8,424,803Source | — | — | — |
| Changes in operating assets and liabilities: | ||||||||||||
| Increase (Decrease) in Accounts PayableUSD | — | — | — | — | — | — | 1,642,755Source | 216,900Source | 443,473Source | — | — | — |
| Deferred Income Tax Expense (Benefit)USD | — | — | — | — | — | — | — | — | 0Source | — | — | — |
| Net Cash Provided by (Used in) Operating ActivitiesUSD | — | — | — | — | — | — | -14,047,760Source | -1,627,908Source | -13,051,195Source | -44,810Source | -46,277Source | -40,056Source |
| Cash flows from investing activities: | ||||||||||||
| Net Cash Provided by (Used in) Investing ActivitiesUSD | — | — | — | — | — | — | -53,439Source | -15,155Source | -43,436Source | — | — | — |
| Payments to Acquire Property, Plant, and EquipmentUSD | — | — | — | — | — | — | 53,439Source | 15,155Source | 43,436Source | — | — | — |
| Cash flows from financing activities: | ||||||||||||
| Net Cash Provided by (Used in) Financing ActivitiesUSD | — | — | — | — | — | — | 75,149,332Source | 860,800Source | 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 | — | — | — | — | — | — | 61,048,133Source | -782,263Source | 16,990,527Source | — | — | — |
| Cash, Cash Equivalents, Restricted Cash and Restricted Cash EquivalentsUSD | — | — | 30,241,931Source | 4,025,508Source | 93,016,000Source | 4,779,000Source | 84,767,555Source | 5,946,632Source | 23,719,422Source | 3,464Source | 774Source | 69Source |
| Additional Financial Items | ||||||||||||
| Share-based Payment Arrangement, ExpenseUSD | — | — | — | — | 7,340,000Source | 196,000Source | 10,384,851Source | 31,999Source | 8,424,803Source | — | — | — |
| DepreciationUSD | — | — | — | — | 9,000Source | 2,000Source | 4,766Source | 526Source | 8,327Source | — | — | — |
| Derivative, Gain (Loss) on Derivative, NetUSD | — | — | -31,601,632Source | -1,248,279Source | — | -1,701,000Source | 0Source | -1,418,066Source | -39,834,049Source | — | — | — |
| General and Administrative ExpenseUSD | — | — | 6,700,416Source | 486,151Source | 13,289,000Source | 1,234,000Source | 13,965,950Source | 1,034,619Source | 14,766,607Source | 44,810Source | 47,625Source | 49,408Source |
| Investment Income, InterestUSD | — | — | 14,322Source | 8,945Source | 574,000Source | — | 492,608Source | — | 210,987Source | — | — | — |
| Net Income (Loss) Attributable to ParentUSD | — | — | -40,390,883Source | -1,944,963Source | -31,009,000Source | -3,799,000Source | -21,343,447Source | -3,136,887Source | -61,002,954Source | -44,810Source | -47,625Source | -49,408Source |
| Nonoperating Income (Expense)USD | — | — | -31,586,446Source | -1,239,334Source | 577,000Source | -1,700,000Source | 495,034Source | -1,417,875Source | -39,618,785Source | — | — | — |
| Operating ExpensesUSD | — | — | 8,804,437Source | 705,629Source | 31,586,000Source | 2,099,000Source | 21,838,481Source | 1,719,012Source | 21,384,169Source | — | — | — |
| Other Nonoperating Income (Expense)USD | — | — | 864Source | — | 3,000Source | 1,000Source | 2,426Source | 191Source | 4,277Source | — | — | — |
| Proceeds from Issuance of Common StockUSD | — | — | — | — | — | — | 80,000,000Source | — | 30,000,000Source | — | — | — |
| Depreciation, Depletion and Amortization | — | — | — | — | — | — | —Source | —Source | — | — | — | — |
| Income Tax Expense (Benefit) | — | — | — | — | —Source | —Source | —Source | —Source | — | — | — | — |
income statement · annual statements
| Line item | Q4 2025 | Q4 2024 | Q3 2025 | Q3 2024 | Q2 2026 | Q2 2025 | Q1 2026 | Q1 2025 | FY 2025 | FY 2024 | FY 2023 | FY 2022 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Operating Income (Loss)USD | — | — | -8,804,437Source | -705,629Source | -31,586,000Source | -2,099,000Source | -21,838,481Source | -1,719,012Source | -21,384,169Source | -44,810Source | -47,625Source | -49,408Source |
| Other Nonoperating Income (Expense)USD | — | — | 864Source | — | 3,000Source | 1,000Source | 2,426Source | 191Source | 4,277Source | — | — | — |
| Net Income (Loss) Attributable to ParentUSD | — | — | -40,390,883Source | -1,944,963Source | -31,009,000Source | -3,799,000Source | -21,343,447Source | -3,136,887Source | -61,002,954Source | -44,810Source | -47,625Source | -49,408Source |
| Earnings Per Share, BasicUSD per share | — | — | -1.29Source | -0.12Source | -0.56Source | -0.27Source | -0.39Source | -0.19Source | -2.41Source | -0.01Source | -0.01Source | -0.01Source |
| Earnings Per Share, DilutedUSD per share | — | — | -1.29Source | -0.12Source | -0.56Source | -0.27Source | -0.39Source | -0.19Source | — | -0.01Source | -0.01Source | 0Source |
| Weighted Average Number of Shares Outstanding, Basicshares | — | — | 31,316,149Source | 16,182,268Source | 55,098,477Source | 14,002,557Source | 54,443,626Source | 16,320,839Source | 25,332,277Source | 5,000,000Source | 5,000,000Source | 5,000,000Source |
| Weighted Average Number of Shares Outstanding, Dilutedshares | — | — | 31,316,149Source | 16,182,268Source | 55,098,477Source | 14,002,557Source | 54,443,626Source | 16,320,839Source | — | 5,000,000Source | 5,000,000Source | 5,000,000Source |
| Additional Financial Items | ||||||||||||
| Current Income Tax Expense (Benefit)USD | — | — | — | — | — | — | — | — | 825Source | — | — | — |
| General and Administrative ExpenseUSD | — | — | 6,700,416Source | 486,151Source | 13,289,000Source | 1,234,000Source | 13,965,950Source | 1,034,619Source | 14,766,607Source | 44,810Source | 47,625Source | 49,408Source |
| Investment Income, InterestUSD | — | — | 14,322Source | 8,945Source | 574,000Source | — | 492,608Source | — | 210,987Source | — | — | — |
| Nonoperating Income (Expense)USD | — | — | -31,586,446Source | -1,239,334Source | 577,000Source | -1,700,000Source | 495,034Source | -1,417,875Source | -39,618,785Source | — | — | — |
| Operating ExpensesUSD | — | — | 8,804,437Source | 705,629Source | 31,586,000Source | 2,099,000Source | 21,838,481Source | 1,719,012Source | 21,384,169Source | — | — | — |
| Research and Development ExpenseUSD | — | — | 2,104,021Source | 219,478Source | 18,297,000Source | 865,000Source | 7,872,531Source | 684,393Source | 6,617,562Source | — | — | — |
| Income Tax Expense (Benefit) | — | — | — | — | —Source | —Source | —Source | —Source | — | — | — | — |
Offerings
Registration 333-299830
Registration 333-296043
- Gross proceeds
- 40000000.0
- Net proceeds
- 37200000.0
- Deal price
- 16.0
- Shares
- 2500000
- Offering price
- $16.00
- Ticker
- FISN
Registration 333-290438
Registration 333-293510
Filing attachments
tm2628600d2_ex4-3.htm · S-3 · 2026-11-04
Exhibit 4.3 DEEP FISSION, INC. INDENTURE Dated as of ___________, 20___ [ ] Trustee TABLE OF CONTENTS Page ARTICLE I. DEFINITIONS AND INCORPORATION BY REFERENCE 1 Section 1.1. Definitions 1 Section 1.2. …
Read attachment ↗tm2627978d1_ex99-1.htm · 8-K · 2026-10-20
Exhibit 99.1 Deep Fission Signs Binding 25-Year Master Energy Purchase Agreement for Planned Commercial Project Agreement with Great Plains Development Authority covers an initial phase of up to 150 MW, targeted for September 2028 and up to 2GW by 2031 Management to host business update call today, October 20th, at 11:00 a.m. ET PARSONS, Kan. - October 20, 2026 - Deep Fission, Inc. (Nasdaq: FISN) today announced a Master Energy Purchase Agreement with the Great Plains Development Authority (…
Read attachment ↗tm2627978d1_ex99-2.htm · 8-K · 2026-10-20
Exhibit 99.2 1 DeepFission.com October 2026 Nasdaq: FISN Business Update ─────────────────── This presentation includes forward-looking statements within the meaning of federal securities laws, including the Private Securities Litigation Reform Act of 1995. Forward-looking statements describe future expectations, plans, results or strategies and can often be identified by the use of terminology such as "anticipate," "believe," "could," "estimate," "expect," "intend," "may," "p…
Read attachment ↗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…
Read attachment ↗tmb-20251231xex4d1.htm · 10-K · 2026-04-15
EXHIBIT 4.1 DESCRIPTION OF SECURITIES REGISTERED PURSUANT TO SECTION 12 OF THE SECURITIES AND EXCHANGE ACT OF 1934 The following description summarizes certain terms of the capital stock of Deep Fission, Inc. (the “Company”). Because it is only a summary, it does not contain all the information that may be important to you and the descriptions herein are qualified by reference to our amended and restated certificate of incorporation (“Certificate of Incorporation”) and our amended and restated…
Read attachment ↗