Deep Fission
FISN · NASDAQ · Industrials
$8.47
+$0.37 (+4.31%) today
Market Cap
$498.93M
24h Volume
$13.0M
P/E Ratio
0.0
52w High
$14.56
52w Low
$6.39
Est. AI Revenue
0%
7-Day Sparkline (Static)
Company facts
Performance
About Deep Fission
Deep Fission is developing a small modular nuclear reactor called the Gravity Reactor, designed to be installed about one mile underground where the surrounding rock and water help manage pressure and cooling. The company aims to sell steady, carbon free power to data centers and other large energy users as electricity demand from AI computing grows.
Its main undertaking is the Gravity Reactor design itself, backed by a co-development agreement with Endeavour Energy to help power its edge data centers and a partnership with Blue Owl covering customer outreach and project financing. The company has also signed non-binding letters of intent with a range of potential offtakers covering a large amount of future generation capacity.
Founded in 2023 and headquartered in Berkeley, California, Deep Fission trades on the Nasdaq and employs about 60 people.
Deep Fission in the AI buildout
Deep Fission sits in the Power & Energy layer as a small modular reactor developer aimed squarely at data center power demand. Its Gravity Reactor has not generated any revenue yet, and its customer commitments are mostly non-binding letters of intent rather than signed contracts, which is why Supercycle scores its AI exposure at 50 out of 100.
FISN is tracked in Power & Energy, rated Strategic on the AI Exposure leaderboard.
By the numbers
52-week range
FISN trades at $8.47, 25% of the way up its 52-week range of $6.39 to $14.56.
Market cap
Market capitalization is $498.93M, with an AI Exposure Score of 50 out of 100.
Market data as of the close on . Prices are end of day, not live.
Frequently asked questions
What does Deep Fission do?
Deep Fission is developing the Gravity Reactor, a small modular nuclear reactor installed about one mile underground, aimed at supplying steady power to data centers and other large energy users.
How is Deep Fission exposed to AI?
Its reactor is aimed at powering AI data centers, including a co-development deal with Endeavour Energy and letters of intent covering a large amount of potential capacity, but none of it is built or generating revenue yet. Supercycle scores it 50 out of 100.
What are Deep Fission's main products?
The Gravity Reactor, an underground small modular nuclear reactor design, is the company's only product line so far.
Is FISN a pure play AI stock?
It is a pure play on nuclear power for large loads including AI data centers, but it is still a development stage company with no reactor revenue, which places it in the Strategic tier of Supercycle's AI Exposure rating rather than the top tier.
Where is Deep Fission based and who leads it?
Deep Fission is headquartered in Berkeley, California, and is led by co-founder and CEO Elizabeth Muller.
Profile written 2026-09, updated as the business changes. Editorial content, not investment advice.
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