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FISN

Deep Fission Inc

FISN

Market cap $319M

5.42 USD

-0.83

13.28%

At close Updated Sep 28, 4:00 PM EDT

Pre-market

After hours

5.58

+0.16

2.95%

1 day

-13.28%

5 days

-31.99%

1 month

-17.38%

3 months

-50.95%

6 months

-62.77%

Year to date

-62.77%

1 year

-62.77%

5 years

-62.77%

10 years

-62.77%

About: Deep Fission Inc is a nuclear energy technology company developing a small modular reactor based on established pressurized water reactor technology, with novel emplacement in deep boreholes approximately one mile below the Earth's surface. Its reactor, which is referred 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. The group's focus is within the United States, where electricity demand growth, expanding digital infrastructure, and evolving energy policy.

Industrials Specialty Industrial Machinery

News

Positive

Neutral

Negative

Sentiment 3-Months

Positive 0%

Neutral 91.7%

Negative 8.3%

Deep Fission Rejects Distortions in Short-Seller Report

PARSONS, Kan.--(BUSINESS WIRE)--Deep Fission, Inc. (Nasdaq: FISN) (“Deep Fission” or the “Company”) was targeted yesterday by a short-seller report criticizing the Company and its technology. Deep Fission believes the report is highly misleading and contains numerous distortions, inaccuracies and mischaracterizations. The report's own disclaimer states that its contents are opinions and “are not statements of fact,” were not supplied by “insiders or connected persons” from Deep Fission, and tha.

Deep Fission Rejects Distortions in Short-Seller Report

Deep Fission and Youngquist Brothers Announce Collaboration on Deep, Large-Diameter Borehole Drilling for Underground Nuclear Reactor Deployment

FORT MYERS, Fla.--(BUSINESS WIRE)--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.

Deep Fission and Youngquist Brothers Announce Collaboration on Deep, Large-Diameter Borehole Drilling for Underground Nuclear Reactor Deployment

Deep Fission Publishes DOE-Approved Nuclear Safety Design Agreement for Gravity™ Pilot Reactor, Demonstrating Commitment to Transparency

WASHINGTON--(BUSINESS WIRE)--Deep Fission, Inc. (Nasdaq: FISN) (“Deep Fission” or the “Company”), an advanced nuclear energy company developing small modular pressurized water reactors installed one mile underground, today announced the public release of its Nuclear Safety Design Agreement (NSDA) for the Gravity™ Nuclear Reactor. The U.S. Department of Energy (DOE) approved the NSDA as part of the Company's Reactor Pilot Program taking place in Parsons, Kansas. The NSDA establishes the safety f.

Deep Fission Publishes DOE-Approved Nuclear Safety Design Agreement for Gravity™ Pilot Reactor, Demonstrating Commitment to Transparency

Deep Fission Installs and Retrieves Full-Scale Reactor Canister Using Off-the-Shelf Drilling Equipment

BERKELEY, Calif.--(BUSINESS WIRE)--Deep Fission, Inc. (Nasdaq: FISN) ("Deep Fission" or the "Company"), an advanced nuclear energy company developing small modular pressurized water reactors a mile underground, today announced that it has successfully installed and retrieved a full-size prototype reactor canister from a borehole using standard commercial drilling equipment operated by a commercial drilling and rigging crew. Nothing about the demonstration required equipment that had to be inven.

Deep Fission Installs and Retrieves Full-Scale Reactor Canister Using Off-the-Shelf Drilling Equipment

Deep Fission Names ShawnTrell Scales as Its First Chief People Officer

CHICAGO--(BUSINESS WIRE)--Deep Fission, Inc. (Nasdaq: FISN) (“Deep Fission” or the “Company”), an advanced nuclear energy company developing small modular pressurized water reactors installed one mile underground, today announced the appointment of ShawnTrell Scales as Chief People Officer. She will lead the company's people strategy as Deep Fission aims to advance from first-of-a-kind demonstration to commercial deployment.ShawnTrell brings more than 20 years of leadership across the energy, ma.

Deep Fission Names ShawnTrell Scales as Its First Chief People Officer

Deep Fission Targets 2027 Grid Power From First Underground Nuclear Reactor

Deep Fission NASDAQ: FISN is targeting commercial electricity generation from its first underground nuclear reactor in Parsons, Kansas, by the end of 2027, Chief Executive Officer Liz Muller said during a company presentation.

Deep Fission Targets 2027 Grid Power From First Underground Nuclear Reactor

Deep Fission Targets 2027 Debut for Underground Nuclear Reactors

Deep Fission NASDAQ: FISN is pursuing an underground approach to advanced nuclear power, with plans to place pressurized water reactors in boreholes roughly a mile below the surface, Co-Founder and CEO Liz Muller said at Canaccord Genuity's 46th annual growth conference.

Deep Fission Targets 2027 Debut for Underground Nuclear Reactors

Department of Energy Approves Nuclear Safety Design Agreement for Deep Fission's Gravity™ Reactor, Designed to Convert to Commercial Operation

BERKELEY, Calif.--(BUSINESS WIRE)--Deep Fission, Inc. (Nasdaq: FISN) (“Deep Fission” or the “Company”), an advanced nuclear energy company developing small modular pressurized water reactors installed one mile underground, today announced that the U.S. Department of Energy (DOE), has approved the company's Nuclear Safety Design Agreement (NSDA) for its Gravity™ Nuclear Reactor. This marks a major regulatory milestone, confirming that Deep Fission's reactor design warrants advancement under the.

Department of Energy Approves Nuclear Safety Design Agreement for Deep Fission's Gravity™ Reactor, Designed to Convert to Commercial Operation

Deep Fission CEO Liz Muller to Present at Canaccord Genuity's 46th Annual Growth Conference

BERKELEY, Calif.--(BUSINESS WIRE)--Deep Fission, Inc. (Nasdaq: FISN) (“Deep Fission” or the “Company”), an advanced nuclear energy company developing small modular pressurized water reactors deployed one mile underground, today announced that Liz Muller, Co-Founder and CEO of Deep Fission, will present at Canaccord Genuity's 46th Annual Growth Conference in Boston, MA on Tuesday, August 11, 2026 at 1:30 p.m. ET. Investors can register for the live webcast of the presentation HERE. In addition,.

Deep Fission CEO Liz Muller to Present at Canaccord Genuity's 46th Annual Growth Conference

Deep Fission: Customer Pipeline Of 18.5GW Is Unlikely To Be A Stock Upside Catalyst

Deep Fission is rated 'Hold' due to limited operating history, no revenue, and a multi-year path to commercialization. FISN targets small modular nuclear reactors using established pressurized water technology, with DoE backing and pilot program inclusion. Significant capital requirements, expected equity dilution, and cash burn are key risks until commercialization, projected in three years.

Deep Fission: Customer Pipeline Of 18.5GW Is Unlikely To Be A Stock Upside Catalyst

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