Deep Fission Inc., a nuclear startup from Berkeley, California, has recently filed for an initial public offering aiming to secure an implied valuation of $1.66 billion. The company seeks to raise approximately $156 million by offering 6 million shares at a price range between $24 and $26 each. Trading is expected to occur under the ticker symbol FISN on the Nasdaq, with William Blair, Stifel, and Canaccord Genuity managing the underwriting process.
This capital will support the development of their innovative Gravity Nuclear Reactor, a small modular reactor intended for construction underground in deep boreholes. By adopting this underground method, Deep Fission claims they can reduce construction costs by 70 to 80 percent compared to traditional nuclear facilities that require significant above-ground infrastructure and concrete containment layers.
The company is not new to the market, having closed an $80 million financing round earlier in February 2026, and has established a pilot reactor agreement with the Department of Energy in Kansas. The goal for commercial deployment is targeted for the timeframe of 2027 to 2028, indicating a strategic planning phase is currently underway.
Investors interested in the emerging energy sector may find Deep Fission's business model appealing, particularly as it aims for sustainable energy solutions through advanced nuclear technology. Their non-binding pipeline currently targets an operational capacity of 15 GWe, which signals significant potential for growth.
A unique aspect of Deep Fission’s strategy involves leveraging artificial intelligence. They have formed a strategic partnership with Endeavour Energy to provide up to 2 GW of energy specifically for AI data centers. This positions the company favorably in a market that increasingly relies on AI infrastructure.
For potential investors, this $1.66 billion valuation for a pre-revenue company can be seen as a calculated risk centered on the company's ability to execute its plans over the next several years. The ambitious timeline for deployment combined with the innovative underground construction process could place Deep Fission ahead of competitors if they successfully reduce costs as claimed. However, the transition from non-binding agreements to contracted revenue will be crucial in determining the future valuation of the company.