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Buy Day today: Neutral (52) Mixed market breadth · no major macro event
FISN

Deep Fission, Inc.

Industrials · Specialty Industrial Machinery

2.10$ -1.0% vs. previous close Closing price · As of: Nov 13, 2026

Ownership

Ownership Structure

Who owns Deep Fission, Inc. (FISN)? This page shows the largest institutions and funds, the ownership structure and the latest insider transactions. 51.1% of the shares are freely tradable; institutional investors hold 8.7%.

Institutional ownership ?Share of the stock held by institutional investors (funds, banks, insurers) according to regulatory filings. 8.7%
Insiders ?Share of the stock held by the executives, founders and major shareholders of the company itself. 37.7%
Float ?Share of stock freely tradable on the market — not locked up in the hands of founders, insiders, or major shareholders. 51.1%
Short % of float ?Shares sold short as a percentage of the freely tradable float — high values signal many bets on falling prices. 5.8%
Shares Outstanding ?Total number of shares issued. Price times share count gives market cap. 59Mio.

Largest Shareholders

Institutions

Institutions FISN
Name Stake (%) Shares Change (%) Date
Blue Owl Capital Holdings LP 2.21 1,333,333 +0.0 06/30/2026
Elevation Wealth Management LLC 0.49 298,335 +0.0 06/30/2026
UBS Group AG 0.33 198,497 +0.0 06/30/2026
CONSOLIDATED PRESS INTERNATIONAL HOLDINGS LTD 0.22 133,333 +0.0 06/30/2026
Citadel Advisors Llc 0.18 110,000 +0.0 06/30/2026
LPL Financial Corp 0.12 70,858 +0.0 06/30/2026
Geode Capital Management, LLC 0.05 27,333 +0.0 06/30/2026

Funds

Funds FISN
Name Stake (%) Shares Change (%) Date
Range Nuclear Renaissance ETF 0.77 456,066 +0.0 10/30/2026
WisdomTree Uranium & Nucler Ey ETF $ Acc 0.15 88,741 +0.0 10/30/2026
Global X Small Modular Reactor ETF 0.05 28,378 +0.0 10/30/2026

Largest reported positions according to regulatory filings; stake as a percentage of shares outstanding, change versus the previous filing. Source: fundamentals data.

Insider holdings

Insider holdings FISN
Person Role Shares Value As of Type
Muller Elizabeth CEO, President 10,000 21,000 $ Nov 11, 2026 direct

Holdings as of each person's most recent SEC Form 4 filing — excluding options and RSUs, which are not shares yet. Holdings may have changed between two filings.

Insiders

Insider Transactions

Insider Transactions
Date Person Role Type Shares Price Value
Nov 11, 2026 Muller Elizabeth CEO, President Buy 10,000 2.16 21,612

Reportable transactions by officers and major shareholders from SEC Form 4 filings. "Other" includes things like stock grants and option exercises without a buy/sell character. View all insider transactions →

Data as of: November 13, 2026 · Source: fundamental data & SEC filings (annual and quarterly reports, 10-K/10-Q)

Note: pure fact-based analysis, not investment advice and not a solicitation to buy or sell. All figures without guarantee.

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