Deep Fission Rejects Distortions in Short-Seller Report

Fri, 25 Sep 2026 20:52:00 -0400

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 that its anonymous author makes no representation as to the accuracy, timeliness or completeness of the information alleged. It further states that investors should assume the author and related

Deep Fission Rejects Distortions in Short-Seller Report

Fri, 25 Sep 2026 20:52:00 -0400

Roth/MKM Starts Deep Fission (FISN) at Buy

Tue, 22 Sep 2026 06:18:41 -0400

Roth/MKM analyst Craig Irwin initiates coverage on Deep Fission (NASDAQ: FISN) with a Buy rating and a price target of $18.00.

For an analyst ratings summary and ratings history on Deep Fission click here. For more ratings news on Deep Fission click here.

Shares of Deep Fission closed at $7.82 yesterday.

Form 8-K DEEP FISSION, INC. For: Sep 21

Mon, 21 Sep 2026 11:26:00 -0400

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Deep Fission partners with Youngquist Brothers on deep borehole drilling

Mon, 21 Sep 2026 07:32:02 -0400

Deep Fission, Inc. (Nasdaq: FISN), a nuclear energy company developing small modular pressurized water reactors (SMRs) for underground deployment, announced a collaboration with Youngquist Brothers, LLC, a commercial drilling contractor, to evaluate and test drilling technologies for placing reactors approximately one mile underground.

According to a press release, the companies completed an equipment demonstration on Sept. 3 in Fort Myers, Florida, where Deep Fission lowered and retrieved a 30-inch full-size prototype reactor canister into a 34-inch borehole to a depth of approximately 100 feet using Youngquist's drilling equipment. The test focused on installation and retrieval mechanics rather than full-depth drilling.

Youngquist Brothers,

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

Mon, 21 Sep 2026 07:30:00 -0400

-- Companies will jointly evaluate and test drilling and borehole-construction methods to support Deep Fission's underground reactor technology --

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 model.

This press release features multimedia. View the full release here: https://www.businesswire.com/news/home/20260921829551/en/

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

Mon, 21 Sep 2026 07:30:00 -0400

-- Companies will jointly evaluate and test drilling and borehole-construction methods to support Deep Fission's underground reactor technology --

This press release features multimedia. View the full release here: https://www.businesswire.com/news/home/20260921829551/en/

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

Tue, 15 Sep 2026 07:30:00 -0400

-- First company in the DOE Reactor Pilot Program to release its complete NSDA; subject to further DOE authorization and NRC licensing, the Company intends to convert the pilot reactor to full commercial operation --

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

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

Tue, 15 Sep 2026 07:30:00 -0400

Deep Fission tests reactor canister install using standard drill gear

Thu, 10 Sep 2026 07:32:50 -0400

Deep Fission, Inc. (Nasdaq: FISN) announced it successfully installed and retrieved a full-size prototype reactor canister from a borehole using standard commercial drilling equipment on Sept. 3, 2026.

A commercial drilling crew lowered the 20-foot, non-nuclear canister to 100 feet depth inside a 34-inch-wide borehole, then brought it back to the surface. The canister is a full-size replica of the housing designed for the company's Gravity™ reactor core and contained no nuclear fuel.

According to the company, no custom-built or specially adapted equipment was required for the demonstration. The drilling rig and rigging used are available from commercial contractors.

"We did not have

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

Thu, 10 Sep 2026 07:30:00 -0400

Commercial drilling crew successfully lowered and recovered Deep Fission's 20-foot prototype reactor canister using equipment already in commercial service in the drilling industry

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 invented, custom-built, or adapted for nuclear service.

This

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

Thu, 10 Sep 2026 07:30:00 -0400

Commercial drilling crew successfully lowered and recovered Deep Fission's 20-foot prototype reactor canister using equipment already in commercial service in the drilling industry

This

Maxim Group Starts Deep Fission (FISN) at Buy

Mon, 31 Aug 2026 07:48:50 -0400

Maxim Group analyst Tate Sullivan initiates coverage on Deep Fission (NASDAQ: FISN) with a Buy rating and a price target of $17.00.

For an analyst ratings summary and ratings history on Deep Fission click here. For more ratings news on Deep Fission click here.

Shares of Deep Fission closed at $6.56 yesterday.

Maxim Group Starts Deep Fission (FISN) at Buy

Mon, 31 Aug 2026 07:48:50 -0400

Maxim Group analyst Tate Sullivan initiates coverage on Deep Fission (NASDAQ: FISN) with a Buy rating and a price target of $17.00.

For an analyst ratings summary and ratings history on Deep Fission click here. For more ratings news on Deep Fission click here.

Shares of Deep Fission closed at $6.56 yesterday.

Deep Fission Names ShawnTrell Scales as Its First Chief People Officer

Tue, 25 Aug 2026 07:00:00 -0400

-- Veteran HR executive joins nuclear energy company to build the people function behind its mission to power humanity from a mile underground --

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.