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Deep Fission, Inc. (FISN) is a listed company, based in Berkeley, United States, with about 51 full-time employees.
It reported revenue of $0 for fiscal year 2025, and net income of -$61.00 million. Its market capitalization was $262.13 million as of October 9, 2026.
Figures from company filings and market data; latest fiscal year ended December 31, 2025; market data as of October 9, 2026.
Deep Fission, Inc. develops and deploys small modular nuclear reactors placed deep underground to generate electricity. The company provides small modular nuclear reactors designed for underground installation at a depth of one mile, offering carbon-free energy and capacity solutions.
Deep Fission reported $0 in revenue for fiscal year 2025.
$262.13 million as of October 9, 2026.