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
Sector
Industrials
Trend
Downtrend
Last close
7.15 (+0.14% on the day)
MA50
9.2
52-week range
6.39–14.56
Market cap
395.3M USD
Dividend yield
0%
Data as of
2026-09-04
Quarterly revenue and earnings, millions
QuarterRevenueYoY %EarningsYoY %
Q1 20250-3.1
Q1 20260-21.3

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