FISN
DEEP FISSION (FISN)
NASDAQ
$2.40+$0.10 (+4.35%)
Price as of Oct 23, 2026 7:35 PM EDT
  • $142.0M
    Market Cap
  • N/A
    1-Year Change
  • Specialty Industrial Machinery
    Industry

Key Performance

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  • Earnings Score: N/A
  • Momentum Score: N/A
  • True Yield: N/A
  • Financial Health Score: N/A
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Latest Research & News

INVESTOR ALERT: Pomerantz Law Firm Investigates Claims on Behalf of Investors of Deep Fission, Inc. - FISN

Pomerantz LLP is investigating Deep Fission, Inc. for potential securities fraud following an Iceberg Research short report claiming the company's underground borehole reactor technology was overhyped and unlikely to achieve commercial viability. The stock fell 10.9% to $6.95 per share after the report's publication on September 26, 2026, just over three months after the company's IPO at $16.00 per share.

10/06/2026, 7:47 PM • GlobeNewswire

INVESTOR ALERT: Pomerantz Law Firm Investigates Claims On Behalf of Investors of Deep Fission, Inc. - FISN

Pomerantz LLP is investigating potential securities fraud claims against Deep Fission, Inc. following an Iceberg Research short report that questioned the viability of the company's underground borehole reactor technology. The stock fell 10.9% to $6.95 per share after the report was published on September 26, 2026, just three months after the company's IPO at $16.00 per share.

09/29/2026, 5:45 PM • GlobeNewswire

The Nuclear IPO Boom Is Back: How Westinghouse and Its Rivals Stack Up for Long-Term Investors

A new wave of nuclear IPOs is emerging, ranging from established operators like Westinghouse to highly speculative start-ups. Investors should carefully evaluate sponsor quality, cash runway, and revenue visibility when considering nuclear IPO investments, as the sector presents both solid opportunities and significant risks.

09/04/2026, 6:14 PM • The Motley Fool

Peers

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Statistics

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Day Range
$2.25
$2.48
$2.30
1-Year Range
$2.30
$14.56
$2.30
Latest Close$2.30
Change
-$0.11 (-4.78%)
Volume667,265
Market Cap$142.0M
Shares Outstanding58.9M
P/E (TTM)-0.98
Diluted EPS (TTM)-$2.46
Enterprise Value$48.9M

Information as of 10/23/2026

Company Profile

DEEP FISSION INC
DEEP FISSION INC
https://deepfission.com
$142.0M
Market Cap
-$113.3M
Net Income
Sector: Industrials
Industry: Specialty Industrial Machinery
2001 Addison Street, Berkeley, CA, United States, 94704
(707) 400-0778

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.

Key Executives

  • Elizabeth A. Muller
  • Richard A. Muller
  • Michael Allen Brasel
  • Jonathan H. Gordon
  • Mark Wayne Peres

Current Ownership Distribution

  • Other56.2M (95.47%)
  • Institutions2.6M (4.40%)
  • Insiders74,295 (0.13%)
  • Mutual Funds0 (0.00%)