Common Stock, par value $0.0001 per share
- Symbol
- FISN
- Exchange
- NASDAQ
- Classification
- COMMON
- Status
- Current
Current Report · Items 7.01, 9.01 · 8-K
Deep Fission, Inc.
FISNNASDAQEQUITYCurrent
Regulation FD Disclosure
Item 7.01 Regulation FD Disclosure. On September 21, 2026, Deep Fission, Inc. (the “Company”) issued a press release announcing its collaboration with Youngquist Brothers, LLC concerning the evaluation and testing of drilling and borehole-construction methods for the Company’s underground reactor deployment model.…
Company context
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.
Current securities
Recent company filings
Registered securities in this filing
Deep Fission, Inc. · 8-K · Filed 2026-09-21
Disclosure sections
Item 7.01Item 7.01 - Regulation FD Disclosure
Item 7.01 Regulation FD Disclosure.
On September 21, 2026, Deep Fission, Inc. (the “Company”)
issued a press release announcing its collaboration with Youngquist Brothers, LLC concerning the evaluation and testing of drilling and
borehole-construction methods for the Company’s underground reactor deployment model. A copy of the press release is furnished as
Exhibit 99.1 to this Current Report on Form 8-K and is incorporated herein by reference.
The information furnished pursuant to Item 7.01 (including Exhibit 99.1) shall not be deemed “filed” for purposes of Section
18 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), or otherwise subject to the liabilities of that
section, nor shall it be deemed incorporated by reference in any filing under the Securities Act of 1933, as amended, or the Exchange
Act, except as expressly set forth by specific reference in such filing.
Filed exhibits (1)
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 water reactors (SMRs) in boreholes approximately one mile underground, today announced a collaboration with Youngquist Brothers, LLC ("Youngquist"), a commercial drilling contractor specializing in large-diameter boreholes, to evaluate and test drilling technologies for Deep Fission's underground reactor deployment model. Under the collaboration, the companies will advance and test methods for constructing large-diameter, deep boreholes for Deep Fission's underground deployment model, drawing on Youngquist's drilling and borehole-construction expertise. On September 3, the companies successfully completed a related equipment demonstration in Fort Myers, Florida, where Deep Fission lowered and r…
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