Deep Fission Raises $40M in IPO to Fund Underground Nuclear Reactor Development
Event summary
- Deep Fission priced its IPO at $16 per share, raising $40M from 2.5M shares.
- Underwriters have a 30-day option to purchase an additional 375,000 shares.
- Stock will begin trading on Nasdaq under the ticker 'FISN' on June 18, 2026.
- Proceeds will fund engineering, R&D, licensing, and construction of its first pilot reactor.
- Company's Gravity Nuclear Reactor™ places small modular reactors one mile underground.
The big picture
Deep Fission's IPO marks a pivotal moment for advanced nuclear energy, as the company seeks to commercialize its underground small modular reactor technology. The $40M raise positions it to compete in the growing SMR sector, which is gaining traction as a solution for baseload clean energy. The company's selection for the Department of Energy's Reactor Pilot Program underscores its strategic importance in the U.S. energy transition.
What we're watching
- Execution Risk
- How Deep Fission will manage the technical and regulatory challenges of deploying underground reactors.
- Market Adoption
- Whether utilities and industrial customers will embrace this novel nuclear approach.
- Competitive Positioning
- The pace at which Deep Fission can scale against traditional nuclear and other SMR developers.
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