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NASDAQ · Specialty Industrial Machinery · USD

Deep Fission, Inc. (FISN) Stock Analysis

Deep Fission, Inc. (FISN) is a Specialty Industrial Machinery stock listed on NASDAQ and quoted in US Dollar.

Last Updated: October 22, 2026

FISN

$2.41

−$0.22 (−8.37%)

Oct 22, 2026 · Market close

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Price History

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FISN Key Statistics

As of Oct 22, 2026
Trading
Open
$2.56
Previous Close
$2.63
Day's Range
2.35–2.61
52-Week Range
2.35–19.00
Volume
456.72K
Valuation
Market Cap
$141.96M
P/E Ratio
unprofitable
EPS (ttm)Profit attributable to each share over the last twelve months.
−1.88
Financials (FY)
Revenue (FY)
$0.00
Net Income (FY)
−$61.00M
Shares OutstandingThe total number of shares held by all investors. Market value is this figure multiplied by the share price.
58.91M
Dividend and dates
Avg Volume
350.65K

Only metrics the company reports are shown. Data provided by Yahoo Finance via yfinance. Updated daily.

Key facts

Deep Fission, Inc. (FISN) has a market capitalization of $141.96M.

In fiscal 2025, FISN reported revenue of $0.00.

FISN Revenue and Earnings by Fiscal Year

FY ends December
Fiscal yearRevenueNet incomeNet margin
2025$0.00−$61.00M—
2024$0.00−$5.71M—
Fiscal yearRevenueGross profitOperating incomeNet incomeNet margin
2025$0.00—−$21.38M−$61.00M—
2024$0.00—−$4.10M−$5.71M—

Annual figures as reported, in the company's reporting currency. As of December 31, 2025.

Recent News

All 15 articles ↓

News provided by third-party sources. Not financial advice.

Analysis

Data-derived

Company Overview

Deep Fission, Inc. (FISN) carries a market capitalisation of $141.96M. It is classified in the Specialty Industrial Machinery industry, within the Industrials sector. The company reports 51 employees.

The 52-week range on file runs from $2.35 to $19.00. The most recent close on file for FISN is $2.41, dated October 22, 2026. That is −$0.22 (−8.37%) against the previous close. The latest close sits 2.55% above that 52-week low.

Financial Health

In fiscal 2025, Deep Fission, Inc. reported revenue of $0.00. The same year closed with a net loss of $61.00M. Trailing earnings per share are −1.88.

Valuation Assessment

No trailing P/E applies: the last reported earnings figure is negative.

Growth & Income

No dividend is on file for FISN.

2026 is still running; the total return is −83.45% year to date.

Peer Comparison

Deep Fission, Inc. (FISN) operates in the Specialty Industrial Machinery industry. Here is how it compares to its closest peers by market capitalization:

Company Ticker Market Cap P/E Ratio
Deep Fission, Inc. FISN $141.96M —
GE Vernova Inc. GEV $220.37B 23.7
Eaton Corporation plc ETN $143.32B 37.5
Parker-Hannifin Corporation PH $112.64B 31.4

The Specialty Industrial Machinery industry average P/E ratio is 29.2x. Deep Fission, Inc. has no P/E ratio because it is not currently profitable.

Every figure above is read from this page's own data on each daily rebuild. Informational only, not financial advice. As of October 22, 2026.

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About Deep Fission, Inc.

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.

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