Deep Fission closes $40M public offering of common stock
Deep Fission, Inc. has successfully closed its public offering, raising $40 million in gross proceeds through the sale of 2.5 million shares at $16.00 per share. The company's stock began trading on the Nasdaq Global Market under the symbol FISN on June 18, 2026. Proceeds will fund general corporate purposes and the development of its first pilot nuclear reactor in Parsons, Kansas.
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Deep Fission, Inc. has closed 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, 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 company's common stock began trading on the Nasdaq Global Market under the symbol "FISN" on June 18, 2026.
Deep Fission intends 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. The company is currently advancing its first reactor project in Parsons, Kansas and was selected for the Department of Energy's Reactor Pilot Program.
Offering Details
The following table outlines the key details of the public offering:
| Component | Details |
|---|---|
| Total shares offered | 2,500,000 |
| Public offering price | $16.00 per share |
| Total gross proceeds | $40 million |
| Underwriters' option | Up to 375,000 additional shares |
| Trading symbol | FISN |
| Exchange | Nasdaq Global Market |
| Trading start date | June 18, 2026 |
Benchmark, a StoneX Company, and Seaport Global Securities acted as joint lead book-running managers for the offering. Maxim Group LLC served 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.
What is the expected timeline for the completion and operationalization of the pilot reactor in Parsons, Kansas?
How will the company leverage its selection for the Department of Energy's Reactor Pilot Program to accelerate regulatory approval?
What are the projected capital requirements beyond the $40 million raised to reach commercial scalability?
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