Deep Fission, Inc. has priced its public offering of 2,500,000 shares of common stock at a public offering price of $16.00 per share, resulting in total gross proceeds of $40 million. The advanced nuclear energy company, which develops small modular pressurized water reactors installed one mile underground, has granted underwriters a 30-day option to purchase up to an additional 375,000 shares at the initial public offering price, less underwriting discounts and commissions. The offering is anticipated to close on June 22, 2026, subject to customary closing conditions.

Deep Fission's common stock has been approved for listing on the Nasdaq Global Market under the symbol "FISN" and is expected to begin trading on June 18, 2026. The company plans to use the net proceeds from this offering for general working capital and corporate purposes. Specifically, the funds will support the engineering, research and development, licensing, and construction of its first pilot nuclear reactor and related technologies.

Offering Details

The following table outlines the key details of the public offering:

Benchmark, a StoneX Company, and Seaport Global Securities are acting as joint lead book-running managers for the offering. Maxim Group LLC is serving as the co-manager. A registration statement relating to these securities has been filed with and declared effective by the Securities and Exchange Commission.

About Deep Fission

Deep Fission focuses on revolutionizing the energy landscape through its Gravity Nuclear Reactor™ approach. This technology places a small modular pressurized water reactor in a borehole approximately one mile underground. The company states this model combines established pressurized water reactor technology with a novel underground deployment to simplify construction, enhance safety, and support scalable commercial deployment. Deep Fission is currently advancing its first reactor project in Parsons, Kansas and was selected for the Department of Energy's Reactor Pilot Program.