Fractyl Health, Inc. (GUTS) Ownership
GUTS ownership summary
as of October 18, 2026- Institutions
- 53.2% of shares outstanding
- Insiders
- 1.45% of shares outstanding
- Shares outstanding
- 13.3M
- Float
- 12.1M shares available to trade
- Short interest
- 1.44% 2.2M shares short
- Days to cover
- 1.19 short interest down 20.2% vs prior month
- Institutions 53.16%
- Insiders 1.45%
- Other investors 45.38%
GUTS top institutional holders
20 largest| # | Holder | % of shares | Shares | Value | Change | Reported |
|---|---|---|---|---|---|---|
| 1 | Nantahala Capital Management, LLC | 14.72% | 22.6M | $35.0M | +9.2M (+68.9%) | June 30, 2026 |
| 2 | 683 Capital Management LLC | 4.39% | 6.7M | $10.4M | +679,615 (+11.2%) | March 31, 2026 |
| 3 | Catalio Capital Management, LP | 4.02% | 6.2M | $9.6M | +676,883 (+12.3%) | June 30, 2026 |
| 4 | Vanguard Capital Management, LLC | 3.98% | 6.1M | $9.5M | +563,920 (+10.2%) | June 30, 2026 |
| 5 | Bank of America Corp | 3.93% | 6.0M | $9.4M | +5.9M (+4,727.7%) | June 30, 2026 |
| 6 | Pale Fire Capital SE | 3.26% | 5.0M | $7.8M | −917,808 (−15.5%) | June 30, 2026 |
| 7 | General Catalyst Group Management, LLC | 3.18% | 4.9M | $7.6M | −7 (−0.0%) | June 30, 2026 |
| 8 | Deer Management Co. LLC | 3.11% | 4.8M | $7.4M | — | June 30, 2026 |
| 9 | Maverick Capital Ltd | 2.59% | 4.0M | $6.2M | — | June 30, 2026 |
| 10 | M28 Capital Management LP | 1.21% | 1.9M | $2.9M | — | June 30, 2026 |
| 11 | BlackRock Inc | 1.17% | 1.8M | $2.8M | −338,777 (−15.8%) | June 30, 2026 |
| 12 | Woodline Partners LP | 1.16% | 1.8M | $2.8M | −458,087 (−20.4%) | June 30, 2026 |
| 13 | Jane Street Group LLC | 1.13% | 1.7M | $2.7M | +1.7M (+4,260.8%) | June 30, 2026 |
| 14 | SILVERARC CAPITAL MANAGEMENT, LLC | 1.07% | 1.6M | $2.5M | −63,649 (−3.7%) | June 30, 2026 |
| 15 | UBS Group AG | 1.03% | 1.6M | $2.4M | −42,274 (−2.6%) | June 30, 2026 |
| 16 | CM Management, LLC | 0.91% | 1.4M | $2.2M | — | June 30, 2026 |
| 17 | Geode Capital Management, LLC | 0.86% | 1.3M | $2.0M | −118,920 (−8.3%) | June 30, 2026 |
| 18 | Ikarian Capital, LLC | 0.72% | 1.1M | $1.7M | — | June 30, 2026 |
| 19 | Marshall Wace Asset Management Ltd | 0.70% | 1.1M | $1.7M | +272,871 (+33.8%) | June 30, 2026 |
| 20 | Logos Global Management LP | 0.65% | 1.0M | $1.6M | — | June 30, 2026 |
Value at the latest close. Change = shares bought or sold in the latest quarterly filing (13F). In the top 20, 7 holders added 19.0M shares and 7 cut 1.9M.
GUTS top mutual fund and ETF holders
11 largest| # | Holder | % of shares | Shares | Value | Change | Reported |
|---|---|---|---|---|---|---|
| 1 | Vanguard MStar Total Stk Mkt Idx Invest | 3.01% | 4.6M | $7.2M | — | August 31, 2026 |
| 2 | Abante Quant Value FI | 0.47% | 716K | $1.1M | — | August 31, 2026 |
| 3 | Fidelity Extended Market Index | 0.39% | 594K | $920,034 | −3,190 (−0.5%) | August 31, 2026 |
| 4 | Fidelity Total Market Index | 0.14% | 214K | $332,005 | — | August 31, 2026 |
| 5 | Fidelity Series Total Market Index | 0.11% | 174K | $269,443 | — | August 31, 2026 |
| 6 | Goldman Sachs Absolute Ret Trckr Instl | 0.10% | 150K | $231,919 | +109,485 (+272.8%) | June 30, 2026 |
| 7 | Vanguard Balanced Index Inv | 0.05% | 72K | $111,028 | — | August 31, 2026 |
| 8 | Vanguard MStar Inst Ttl StkMktIdxInstlPl | 0.04% | 68K | $105,012 | — | August 31, 2026 |
| 9 | Vanguard U.S. Eq Idx £ Acc | 0.03% | 41K | $64,032 | — | August 31, 2026 |
| 10 | Victory Extended Market Index | 0.01% | 15K | $23,264 | +2,323 (+18.3%) | June 30, 2026 |
| 11 | JHVIT Total Stock Market Index I | <0.01% | 3,247 | $5,033 | — | August 31, 2026 |
Funds report holdings monthly or quarterly; dates differ by fund.
GUTS insider transactions
latest 1| Date | Name | Transaction | Price | Shares | Value |
|---|---|---|---|---|---|
| 2025-12-04 | Harith Rajagopalan | Buy | $1.92 | 10,416 | $19,999 |
Reported trades by company officers, directors and other filers (including disclosures by members of Congress where EODHD lists them). "—" where the filing gives no share count.
GUTS shares outstanding
Year-end shares outstanding, adjusted for splits.
Who owns GUTS
Institutional investors own 53.2% of Fractyl Health's shares and insiders 1.45%. The largest holder is Nantahala Capital Management, LLC with 14.72% of the shares (22.6M), as of June 30, 2026. Among the top 20 institutions, 7 added shares and 7 reduced their stake in the latest filings. Short interest is 1.44% of the float, or 1.19 days of average trading volume. The share count fell 73.2% since 2020.
Related: GUTS analyst forecast, GUTS key metrics. See the GUTS stock overview for the latest quote and news.
GUTS ownership FAQ
Who owns the most Fractyl Health stock?
The largest shareholders of Fractyl Health are Nantahala Capital Management, LLC (14.72%), 683 Capital Management LLC (4.39%), Catalio Capital Management, LP (4.02%), Vanguard Capital Management, LLC (3.98%), Bank of America Corp (3.93%).
What percentage of Fractyl Health is owned by institutions?
Institutions hold 53.2% of Fractyl Health's shares outstanding; insiders hold 1.45%.
Which funds own Fractyl Health?
The largest fund holders of Fractyl Health are Vanguard MStar Total Stk Mkt Idx Invest (3.01%), Abante Quant Value FI (0.47%), Fidelity Extended Market Index (0.39%), Fidelity Total Market Index (0.14%), Fidelity Series Total Market Index (0.11%).
What is Fractyl Health's short interest?
2.2M shares of Fractyl Health were sold short, 1.44% of the float; at the average daily volume it would take 1.19 days to cover.
Are insiders buying or selling Fractyl Health?
Of the latest 1 reported insider transactions in Fractyl Health (since December 4, 2025), 1 were purchases and 0 were sales.
How many shares of Fractyl Health are outstanding?
Fractyl Health has 13.3M shares outstanding, of which 12.1M are in the public float.