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Buy Day today: Good (62) Broad market participation · no major macro event
GUTS

Fractyl Health, Inc.

Healthcare · Biotechnology

0.5908$ +5.0% vs. previous close Closing price · As of: Sep 17, 2026

Ownership

Ownership Structure

Who owns Fractyl Health, Inc. (GUTS)? This page shows the largest institutions and funds, the ownership structure and the latest insider transactions. 91.6% of the shares are freely tradable; institutional investors hold 52.5%.

Institutional ownership ?Share of the stock held by institutional investors (funds, banks, insurers) according to regulatory filings. 52.5%
Insiders ?Share of the stock held by the executives, founders and major shareholders of the company itself. 1.4%
Float ?Share of stock freely tradable on the market — not locked up in the hands of founders, insiders, or major shareholders. 91.6%
Short % of float ?Shares sold short as a percentage of the freely tradable float — high values signal many bets on falling prices. 1.5%
Shares Outstanding ?Total number of shares issued. Price times share count gives market cap. 159Mio.

Largest Shareholders

Institutions

Institutions GUTS
Name Stake (%) Shares Change (%) Date
Nantahala Capital Management, LLC 8.40 13,364,519 +23.2 03/31/2026
683 Capital Management LLC 4.23 6,727,235 +11.2 03/31/2026
Catalio Capital Management, LP 3.88 6,168,749 +12.3 06/30/2026
Vanguard Capital Management, LLC 3.48 5,533,006 +0.0 03/31/2026
Pale Fire Capital SE 3.14 5,003,237 -15.5 06/30/2026
General Catalyst Group Management, LLC 3.07 4,884,186 +0.0 06/30/2026
Deer Management Co. LLC 3.00 4,770,901 +0.0 03/31/2026
Maverick Capital Ltd 2.50 3,974,806 -6.4 03/31/2026
Woodline Partners LP 1.41 2,241,679 -59.3 03/31/2026

Funds

Funds GUTS
Name Stake (%) Shares Change (%) Date
Vanguard MStar Total Stk Mkt Idx Invest 2.90 4,621,427 +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.

Insider holdings

Insider holdings GUTS
Person Role Shares Value As of Type
Bradley William Director 149,138 88,111 $ Sep 14, 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
Sep 14, 2026 Bradley William Director Buy 64,516 0.6185 39,903

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: September 17, 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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