Deep Fission, Inc. (FISN)

Deep Fission is an advanced nuclear energy company developing small modular pressurized-water reactors designed to operate roughly one mile underground in deep boreholes. Its Gravity Nuclear Reactor concept pairs established PWR technology and low-enriched uranium fuel with deep emplacement to reduce surface infrastructure, support passive safety features and aim for faster, more repeatable deployment. The company is pre-commercial, working through design, regulatory pre-application and early commercialization steps rather than operating power plants today.

Market
Nasdaq
Trend
Downtrend
Last close
2.63 (-6.41% on the day)
MA50
6.33
52-week range
2.63–14.56
Market cap
262.1M USD
Dividend yield
0%
Data as of
2026-03-31
Quarterly revenue and earnings, millions
QuarterRevenueYoY %EarningsYoY %
Q1 20250—-3.1—
Q1 20260—-21.3—

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