Deep Fission Inc

FISN

Market cap $486M

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.

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 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 is not primarily trying to reinvent reactor physics; it is attempting to commercialize a borehole deployment model using conventional PWR technology, standard LEU fuel, and established drilling methods. The post-IPO weakness appears driven more by technical selling, limited market awareness, and development-stage skepticism than by a material change in the company's commercial roadmap. Deep Fission's DOE Reactor Pilot Program path is differentiated because the company is advancing the reactor configuration that management intends to commercialize, not merely pursuing a standalone criticality experiment.

PARSONS, Kan.--(BUSINESS WIRE)---- $FISN--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 arrival of its prototype reactor canister at its Parsons, Kansas site, marking a key milestone in the Company's Proof-of-Concept Well program and its Gravity Nuclear Reactor™ development. In celebration of this milestone and its listing on the Nasdaq Stock Ma.

IDAHO FALLS, Idaho--(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, will participate in the Golden Era of Nuclear Power event at Idaho National Laboratory's (INL) Materials and Fuels Complex in Idaho Falls, Idaho on Thursday, June 25. This event comes just ahead of the 250th anniversary of the United States, underscoring the country's progr.

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 it has signed Letters of Intent (LOIs) with data centers, co-developers, industrial parks, and strategic partners representing up to 18.5 gigawatts (GW) of potential generation capacity. “The growing pipeline is a testament to the urgent interest in our mile-d.

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 the closing of its public offering of 2,500,000 shares of its common stock at a public offering price of $16.00 per share, for total gross proceeds of $40 million, before deducting underwriting discounts and commissions and other offering expenses payable by th.