Who owns Fractyl Health, Inc. Common Stock (GUTS)
Which tracked institutional funds hold GUTS, how they are positioned, and who is buying versus exiting — from SEC Form 13F-HR filings. See GUTS company fundamentals →
Ownership as of the 2026-Q1 13F filings (latest filed 2026-05-18). 13F is disclosed up to 45 days after quarter-end, so the most recent quarter fills in over the following weeks.
How the tape is positioned
The tracked-fund tape on GUTS is one-sided between 2025-Q4 and 2026-Q1: 1 added or opened and 50 trimmed or exited — on balance reducing.
A prompt to read the filings, not a verdict. 13F is a quarter-end snapshot disclosed up to 45 days late; a fund adds or exits for mandate, benchmark, and timing reasons that have nothing to do with a view on the stock. This is a starting question, not a signal to trade.
Conviction spread
GUTS’s largest tracked holder by dollar value, VANGUARD GROUP INC, sizes it at 0.0% of its own reported 13F book, while the median holder sizes it at 0.0% of theirs — a 0.0pp gap the other way — the median holder sizes GUTS more heavily than its largest holder by dollar value does.
Book-share is each fund’s reported value in GUTS divided by its whole reported 13F book, so it is comparable across funds of different sizes and is unaffected by stock splits. A higher share means a fund has committed more of its book to the name — a starting question about conviction, not a verdict or a signal to trade.
Institutional & insider positioning
Between 2025-Q4 and 2026-Q1, across 83 tracked filers holding GUTS, 33 increased or opened the position and 60 reduced or closed it; over the same quarter, there were no open-market insider Form 4s.
This fuses two public signals for the same quarter — how tracked institutions changed their positions and whether insiders bought or sold in the open market. It describes what was filed; it is a starting question, not a verdict or a signal to trade.
New buyers & exits
Funds opening or closing a position in GUTS between the 2025-Q4 and 2026-Q1 13F filings, and the largest changes among funds holding it in both. New buyers and exits are counted on fund presence (split-invariant); adds and trims are measured on reported value.
New buyers 1
- VANGUARD CAPITAL MANAGEMENT LLC$3M
Full exits 15
- VANGUARD GROUP INC$13M
- HCC Manager LLC$10M
- Alyeska Investment Group, L.P.$8M
- Atom Investors LP$4M
- MILLENNIUM MANAGEMENT LLC$4M
- D. E. Shaw & Co., Inc.$3M
Largest trims
- SILVERARC CAPITAL MANAGEMENT, LLC$21M
- Nantahala Capital Management, LLC$18M
- MARSHALL WACE, LLP$13M
- Woodline Partners LP$11M
- 683 Capital Management, LLC$10M
- Catalio Capital Management, LP$10M
Institutional holders
One row per tracked fund, largest reported value first. “% of value” is the fund’s share of this security’s tracked institutional value — not of shares outstanding. Rows marked stale are from an earlier filing than the security’s latest quarter — that fund is absent from the newest snapshot (position exited, or reported under a different name).
| Fund | Shares | Reported value | % of value | Quarter |
|---|---|---|---|---|
| Nantahala Capital Management, LLC added | 13,364,519 | $6M | 6.5% | 2026-Q1 |
| 683 Capital Management, LLC added | 6,727,235 | $3M | 3.3% | 2026-Q1 |
| Pale Fire Capital SE added | 5,921,045 | $3M | 2.9% | 2026-Q1 |
| VANGUARD CAPITAL MANAGEMENT LLC new | 5,533,006 | $3M | 2.7% | 2026-Q1 |
| Catalio Capital Management, LP | 5,491,866 | $3M | 2.7% | 2026-Q1 |
| General Catalyst Group Management, LLC | 4,884,193 | $2M | 2.4% | 2026-Q1 |
| Deer Management Co. LLC | 4,770,901 | $2M | 2.3% | 2026-Q1 |
| MAVERICK CAPITAL LTD trimmed | 3,974,806 | $2M | 1.9% | 2026-Q1 |
| Woodline Partners LP trimmed | 2,241,679 | $1M | 1.1% | 2026-Q1 |
| BlackRock, Inc. added | 2,139,837 | $980K | 1.0% | 2026-Q1 |
| M28 Capital Management LP | 1,856,117 | $850K | 0.9% | 2026-Q1 |
| SILVERARC CAPITAL MANAGEMENT, LLC trimmed | 1,701,625 | $779K | 0.8% | 2026-Q1 |
| UBS Group AG added | 1,622,163 | $743K | 0.8% | 2026-Q1 |
| GEODE CAPITAL MANAGEMENT, LLC added | 1,435,261 | $657K | 0.7% | 2026-Q1 |
| CM Management, LLC added | 1,400,000 | $641K | 0.7% | 2026-Q1 |
| Ikarian Capital, LLC | 1,100,000 | $504K | 0.5% | 2026-Q1 |
| Logos Global Management LP trimmed | 1,000,000 | $458K | 0.5% | 2026-Q1 |
| MARSHALL WACE, LLP trimmed | 603,871 | $278K | 0.3% | 2026-Q1 |
| VANGUARD FIDUCIARY TRUST CO new | 606,185 | $278K | 0.3% | 2026-Q1 |
| Burkehill Global Management, LP | 500,000 | $229K | 0.2% | 2026-Q1 |
| MORGAN STANLEY trimmed | 495,901 | $227K | 0.2% | 2026-Q1 |
| TWO SIGMA INVESTMENTS, LP trimmed | 479,737 | $220K | 0.2% | 2026-Q1 |
| STATE STREET CORP trimmed | 464,700 | $213K | 0.2% | 2026-Q1 |
| Shay Capital LLC added | 357,865 | $164K | 0.2% | 2026-Q1 |
| BOOTHBAY FUND MANAGEMENT, LLC | 275,219 | $126K | 0.1% | 2026-Q1 |
| Brevan Howard Capital Management LP trimmed | 232,369 | $99K | 0.1% | 2026-Q1 |
| NORTHERN TRUST CORP | 215,877 | $99K | 0.1% | 2026-Q1 |
| BRIDGEWAY CAPITAL MANAGEMENT, LLC added | 208,925 | $96K | 0.1% | 2026-Q1 |
| PEAK6 LLC | 200,000 | $92K | 0.1% | 2026-Q1 |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP trimmed | 176,087 | $81K | 0.1% | 2026-Q1 |
| Cerity Partners LLC added | 168,500 | $77K | 0.1% | 2026-Q1 |
| BANK OF AMERICA CORP /DE/ trimmed | 124,989 | $57K | 0.1% | 2026-Q1 |
| OMERS ADMINISTRATION Corp trimmed | 123,900 | $57K | 0.1% | 2026-Q1 |
| BARCLAYS PLC trimmed | 116,048 | $53K | 0.1% | 2026-Q1 |
| OSAIC HOLDINGS, INC. added | 100,812 | $46K | 0.0% | 2026-Q1 |
| Accredited Investors Inc. new | 100,000 | $46K | 0.0% | 2026-Q1 |
| GSA CAPITAL PARTNERS LLP trimmed | 87,465 | $40K | 0.0% | 2026-Q1 |
| GOLDMAN SACHS GROUP INC trimmed | 68,433 | $31K | 0.0% | 2026-Q1 |
| Conservest Capital Advisors, Inc. | 64,118 | $29K | 0.0% | 2026-Q1 |
| Cambridge Investment Research Advisors, Inc. | 64,000 | $29K | 0.0% | 2026-Q1 |
| HighTower Advisors, LLC | 51,442 | $24K | 0.0% | 2026-Q1 |
| CITADEL ADVISORS LLC trimmed | 48,196 | $22K | 0.0% | 2026-Q1 |
| Catalyst Funds Management Pty Ltd added | 46,800 | $21K | 0.0% | 2026-Q1 |
| XTX Topco Ltd trimmed | 44,192 | $20K | 0.0% | 2026-Q1 |
| Vanguard Global Advisers, LLC new | 41,311 | $19K | 0.0% | 2026-Q1 |
| Phraction Management LLC new | 41,000 | $19K | 0.0% | 2026-Q1 |
| VANGUARD GROUP INC added | 6,028,179 | $13M | 14.0% | 2025-Q4 stale |
| HCC Manager LLC trimmed | 4,673,870 | $10M | 10.9% | 2025-Q4 stale |
| Alyeska Investment Group, L.P. trimmed | 3,809,523 | $8M | 8.9% | 2025-Q4 stale |
| Atom Investors LP added | 1,883,018 | $4M | 4.4% | 2025-Q4 stale |
| MILLENNIUM MANAGEMENT LLC added | 1,861,418 | $4M | 4.3% | 2025-Q4 stale |
| D. E. Shaw & Co., Inc. added | 1,442,745 | $3M | 3.4% | 2025-Q4 stale |
| TWO SIGMA ADVISERS, LP new | 1,298,700 | $3M | 3.0% | 2025-Q4 stale |
| Newtyn Management, LLC new | 1,134,021 | $2M | 2.6% | 2025-Q4 stale |
| MASSACHUSETTS FINANCIAL SERVICES CO /MA/ trimmed | 852,344 | $2M | 2.0% | 2025-Q4 stale |
| Walleye Capital LLC new | 592,125 | $1M | 1.4% | 2025-Q4 stale |
| Diametric Capital, LP added | 503,409 | $1M | 1.2% | 2025-Q4 stale |
| Alphabet Inc. | 662,584 | $1M | 1.1% | 2025-Q3 stale |
| HRT FINANCIAL LP added | 614,792 | $977K | 1.0% | 2025-Q3 stale |
| Soleus Capital Management, L.P. trimmed | 400,000 | $880K | 0.9% | 2025-Q4 stale |
| Rosalind Advisors, Inc. trimmed | 385,731 | $849K | 0.9% | 2025-Q4 stale |
| Point72 Asset Management, L.P. trimmed | 365,173 | $803K | 0.8% | 2025-Q4 stale |
| Quadrature Capital Ltd added | 290,714 | $640K | 0.7% | 2025-Q4 stale |
| ExodusPoint Capital Management, LP added | 178,024 | $392K | 0.4% | 2025-Q4 stale |
| Hudson Bay Capital Management LP added | 171,816 | $378K | 0.4% | 2025-Q4 stale |
| Squarepoint Ops LLC added | 147,659 | $325K | 0.3% | 2025-Q4 stale |
| Quantbot Technologies LP new | 120,434 | $265K | 0.3% | 2025-Q4 stale |
| Qube Research & Technologies Ltd added | 117,631 | $259K | 0.3% | 2025-Q4 stale |
| NORGES BANK | 100,000 | $253K | 0.3% | 2025-Q3 stale |
| Y-Intercept (Hong Kong) Ltd new | 111,425 | $181K | 0.2% | 2025-Q2 stale |
| Virtu Financial LLC added | 69,427 | $153K | 0.2% | 2025-Q4 stale |
| Balyasny Asset Management L.P. trimmed | 60,219 | $132K | 0.1% | 2025-Q4 stale |
| Blackstone Inc. | 102,750 | $122K | 0.1% | 2025-Q1 stale |
| Susquehanna Portfolio Strategies, LLC new | 49,137 | $108K | 0.1% | 2025-Q4 stale |
| AQR CAPITAL MANAGEMENT LLC added | 64,700 | $105K | 0.1% | 2025-Q2 stale |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC | 80,664 | $96K | 0.1% | 2025-Q1 stale |
| Nuveen, LLC new | 72,958 | $87K | 0.1% | 2025-Q1 stale |
| COMMONWEALTH EQUITY SERVICES, LLC new | 38,700 | $85K | 0.1% | 2025-Q4 stale |
| Lighthouse Investment Partners, LLC new | 36,300 | $80K | 0.1% | 2025-Q4 stale |
| CITIGROUP INC added | 35,076 | $77K | 0.1% | 2025-Q4 stale |
| Jump Financial, LLC new | 26,000 | $57K | 0.1% | 2025-Q4 stale |
| Arrowpoint Investment Partners (Singapore) Pte. Ltd. new | 35,000 | $56K | 0.1% | 2025-Q3 stale |
| Jain Global LLC new | 32,929 | $53K | 0.1% | 2025-Q2 stale |
| Scientech Research LLC trimmed | 18,006 | $40K | 0.0% | 2025-Q4 stale |
| Centiva Capital, LP trimmed | 17,419 | $38K | 0.0% | 2025-Q4 stale |
| STONERIDGE INVESTMENT PARTNERS LLC added | 23,721 | $38K | 0.0% | 2025-Q3 stale |
| RHUMBLINE ADVISERS added | 28,769 | $34K | 0.0% | 2025-Q1 stale |
| SEI INVESTMENTS CO | 27,778 | $33K | 0.0% | 2025-Q1 stale |
| Tower Research Capital LLC (TRC) added | 14,768 | $32K | 0.0% | 2025-Q4 stale |
| INTECH INVESTMENT MANAGEMENT LLC added | 25,154 | $30K | 0.0% | 2025-Q1 stale |
| Cubist Systematic Strategies, LLC new | 15,129 | $25K | 0.0% | 2025-Q2 stale |
| MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd. added | 20,338 | $24K | 0.0% | 2025-Q1 stale |
| NewSquare Capital LLC | 18,943 | $23K | 0.0% | 2025-Q1 stale |
| Point72 Asia (Singapore) Pte. Ltd. trimmed | 14,126 | $22K | 0.0% | 2025-Q3 stale |
| ADAR1 Capital Management, LLC new | 13,097 | $21K | 0.0% | 2025-Q3 stale |
| Beta Wealth Group, Inc. | 17,486 | $21K | 0.0% | 2025-Q1 stale |
| Vanguard Personalized Indexing Management, LLC new | 16,893 | $20K | 0.0% | 2025-Q1 stale |
| Corebridge Financial, Inc. trimmed | 16,707 | $20K | 0.0% | 2025-Q1 stale |
| Russell Investments Group, Ltd. trimmed | 12,234 | $20K | 0.0% | 2025-Q2 stale |
| FMR LLC trimmed | 11,612 | $19K | 0.0% | 2025-Q2 stale |
Ownership over time
Tracked institutional holder count and total shares held by filing quarter (independent scales). The curated-era tail and any mid-ingest latest quarter are handled honestly — a partial quarter is not drawn as a collapse.
Reading this table
Funds hold the same stock for different reasons — an index fund “holds” almost everything, an active manager sizes a name to a mandate and a benchmark, and each fund entered at its own price and time. Because 13F is filed up to 45 days after quarter-end, every row is a backward-looking snapshot; a manager may have traded since. Share-class siblings (a company’s A and C shares) are rolled up to one line so a dual-class name is never double-counted. Compare like-for-like. A large holder is not an endorsement, and a fund exiting is not a warning — this is a starting question, not a verdict.
About 13F filings
A Form 13F is a quarterly disclosure that institutional investment managers with over $100 million in US-listed equities must file with the SEC. In plain English: it is a snapshot of the long stock positions a fund held at the end of a quarter. It covers long US-listed equities only — not short positions, options, cash, or private holdings — and the funds shown are the large sample we track, not the complete 13F universe.