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FISN

Deep Fission, Inc.

Industrials · Specialty Industrial Machinery

5.10$ -2.2% vs. previous close Closing price · As of: Sep 30, 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. 54.1% 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. 54.1%
Short % of float ?Shares sold short as a percentage of the freely tradable float — high values signal many bets on falling prices. 2.2%
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 2.26 1,333,333 +0.0 06/30/2026
Elevation Wealth Management LLC 0.51 298,335 +0.0 06/30/2026
CONSOLIDATED PRESS INTERNATIONAL HOLDINGS LTD 0.23 133,333 +0.0 06/30/2026
Citadel Advisors Llc 0.19 110,000 +0.0 06/30/2026
Essential Investment Partners, LLC 0.04 26,400 +0.0 06/30/2026
Chapin Davis Inc 0.03 19,000 +0.0 06/30/2026
Bhk Investment Advisors, LLC 0.03 15,000 +0.0 06/30/2026
Traphagen Investment Advisors LLC 0.02 13,666 +0.0 06/30/2026
Integrated Wealth Concepts LLC 0.02 9,600 +0.0 06/30/2026

Funds

Funds FISN
Name Stake (%) Shares Change (%) Date
Fidelity Nasdaq Composite Index 0.06 35,585 +0.0 07/31/2026

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

Data as of: September 30, 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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