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Deep Fission Inc. Company Profile

NASDAQ: FISNUtilitiesElectric Utilities: CentralUSD

4.66-0.42 (-8.27%)

At close: Oct 8, 4:00 PM ET · Delayed 15 min

Deep Fission at a glance

Deep Fission Inc. (NASDAQ: FISN) is a Electric Utilities: Central company in the Utilities sector headquartered in Berkeley, CA. Deep Fission is led by Ms. Elizabeth A. Muller and employs about 51 people. The company's shares have traded publicly since 2026.

At a market capitalization of $274.5 million, it is considered a small-cap company. Its SEC Central Index Key (CIK) is 0001918102, which identifies the company's filings on EDGAR.

Summary generated from market data by MetaCap's automated system. Methodology

What does Deep Fission do?

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. It delivers scalable reactor configurations for onsite power needs or flexible offtake agreements in wholesale power markets, manages the licensing process with regulatory authorities, and supports strategic development for decarbonization and reliability goals. The company also provides advisory and partnership services for deployment and operation of its reactor technology, using artificial intelligence to streamline operations. Deep Fission serves utilities, data centers, heavy industry, the military, government, and large cities. The company was founded in 2023 and is based in Berkeley, California.

Business description based on the company's public filings.

Company information

Legal name
Deep Fission Inc.
Ticker
NASDAQ: FISN
Sector
Utilities
Industry
Electric Utilities: Central
CEO
Ms. Elizabeth A. Muller
Employees
51
Headquarters
2001 Addison Street, Berkeley, CA, United States
Phone
(707) 400-0778
IPO year
2026
Market cap
$274.50M
SEC CIK
0001918102
Latest annual report
10-K · Apr 15, 2026

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