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Deep Fission Goes Public in Reverse Merger, Raises $30 Million for Underground Reactor Push

The deal funds a sprint toward a DOE pilot milestone in July 2026.

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The company aims to deploy 15-megawatt borehole reactors.
Deep Fission, Inc. has announced new funding.

Overview

  • Deep Fission merged with Surfside Acquisition at $3 per share in a reverse merger tied to a $30 million private placement, with shares not yet trading and a plan to seek quotation on the OTCQB.
  • The company was selected for the Department of Energy’s Reactor Pilot Program, which targets first criticality by July 2026 under a streamlined permitting process.
  • Deep Fission proposes 15-megawatt pressurized-water reactors installed one mile underground in 30-inch boreholes, aiming to leverage geology for shielding and a smaller surface footprint.
  • The startup cites a data-center agreement with Endeavor for up to 2 gigawatts of underground reactors, positioning its design for power-hungry computing facilities.
  • Backers named in the raise include 8VC, Deep Future, Wave Function, Ed Eisler and Mark Tompkins, while the company acknowledges public reporting obligations and an ambitious schedule with modest proceeds.