Fractyl Health, Inc. Common Stock
Fractyl Health, Inc. Common Stock (GUTS) Stock Ownership
Institutional vs insider vs public ownership from 13F and float data — top holders, activity, and insider trades below.
SEC 13F · FMP · GUTS · as of Sep 30, 2025
Ownership Breakdown
74
Institutional Holders
▲ 13 vs Q2
$145.55M
Total Inst. Value
▲ $100.69M vs Q2
72.19M
Shares Outstanding
freeFloat 40.70%
91.55M
13F Shares Held
▲ 63.86M vs Q2
Institutional ownership = 13F shares ÷ total outstanding. Insider % = 100 − free float. Public % = free float − institution %. Data: FMP /symbol-positions-summary + /shares-float + SEC EDGAR.
Top Institutional Holders
GUTS largest shareholders · institutional ownership
Q3 2025 · SEC 13F
Showing top 10 holders
| Holder | Shares | % Owned | Weight | Value | Reported | Change |
|---|---|---|---|---|---|---|
NANTAHALA CAPITAL MANAGEMENT, LLC surgical & medical instruments & apparatus | 12.14M | 18.77% | 18.77% | $19.30B | Nov 14, 2025 | NEW |
SILVERARC CAPITAL MANAGEMENT, LLC surgical & medical instruments & apparatus | 10.60M | 16.40% | 16.40% | $16.85B | Nov 12, 2025 | ▲ 10.40M |
ALYESKA INVESTMENT GROUP, L.P. surgical & medical instruments & apparatus | 5.65M | 8.74% | 8.74% | $8.98B | Nov 17, 2025 | NEW |
WOODLINE PARTNERS LP surgical & medical instruments & apparatus | 5.51M | 8.52% | 8.52% | $8.76B | Nov 14, 2025 | ▲ 4.91M |
CATALIO CAPITAL MANAGEMENT, LP surgical & medical instruments & apparatus | 5.21M | 8.06% | 8.06% | $8.29B | Nov 14, 2025 | ▲ 5.00M |
ROSALIND ADVISORS, INC. surgical & medical instruments & apparatus | 5.00M | 7.73% | 7.73% | $7.95B | Nov 13, 2025 | NEW |
GENERAL CATALYST GROUP MANAGEMENT, LLC surgical & medical instruments & apparatus | 4.88M | 7.55% | 7.55% | $7.77B | Nov 14, 2025 | — held |
DEER MANAGEMENT CO. LLC surgical & medical instruments & apparatus | 4.77M | 7.38% | 7.38% | $7.59B | Nov 14, 2025 | — held |
HCC MANAGER LLC surgical & medical instruments & apparatus | 4.67M | 7.23% | 7.23% | $7.43B | Nov 10, 2025 | — held |
683 CAPITAL MANAGEMENT, LLC surgical & medical instruments & apparatus | 4.65M | 7.19% | 7.19% | $7.39B | Nov 14, 2025 | ▲ 4.00M |
Data from SEC Form 13F filings. Ownership bar normalised to largest holder. Change flags: isNew / isSoldOut / changeInSharesNumber (FMP extract-analytics/holder).
Institutional Activity
Q3 2025 vs prior quarter
Q3 2025
17
Increased
+29.24M shares20
New Positions
first time holders4
Decreased
−249.4K shares0
Sold Out
fully exitedNet shares change (top 50)
+28.99M
+29.24M / −249.4K
Net new holders
+33
20 new / 0 exited
Based on top 50 institutional holders by position size. Fields: isNew, isSoldOut, changeInSharesNumber (FMP extract-analytics/holder, limit=50).
Insider Buying vs Selling
GUTS insider trading · insider activity
Source: SEC Form 4
Insiders have been net buyers of shares recently. Selling may be driven by pre-scheduled Rule 10b5-1 plans rather than negative sentiment.
1
Buy transactions
0
Sell transactions
0.00
Buy/Sell ratio
$0M
Total disposed
Recent Insider Transactions
Showing 10 most recent · Common Stock only
| Name · Role | Date | Type | Shares | Price | Value | After Trans. | Filing |
|---|---|---|---|---|---|---|---|
Smith Weber Lara Chief Financial Officer | Jan 12, 2026 | Award | 1,036,800 | $2.00 | $2.07M | 1.04M | Form 4 ↗ |
Toomey Sarah General Counsel | Dec 15, 2025 | Award | 743,913 | $2.24 | $1.67M | 743.9K | Form 4 ↗ |
Caplan Jay David President, Chief Product Off. | Dec 15, 2025 | Award | 845,226 | $2.24 | $1.89M | 845.2K | Form 4 ↗ |
Rajagopalan Harith Chief Executive Officer | Dec 15, 2025 | Award | 2,486,302 | $2.24 | $5.57M | 2.49M | Form 4 ↗ |
Rajagopalan Harith Chief Executive Officer | Dec 4, 2025 | Purchase | 10,416 | $1.92 | $20.0K | 501.7K | Form 4 ↗ |
Thompson Christopher Charles director | Sep 2, 2025 | Award | 45,000 | $0.98 | $44.0K | 45.0K | Form 4 ↗ |
Sheffield Ian director | Sep 2, 2025 | Award | 45,000 | $0.98 | $44.0K | 45.0K | Form 4 ↗ |
SCHULMAN AMY W director | Jun 11, 2025 | Award | 22,500 | $2.27 | $51.1K | 22.5K | Form 4 ↗ |
Elia Marc director | Jun 11, 2025 | Award | 22,500 | $2.27 | $51.1K | 22.5K | Form 4 ↗ |
MEANWELL CLIVE director | Jun 11, 2025 | Award | 22,500 | $2.27 | $51.1K | 22.5K | Form 4 ↗ |
Source: /insider-trading/search (FMP stable). Buy/Sell direction: acquisitionOrDisposition A=Buy, D=Sell. RSU vesting (M-Exempt) excluded from sentiment bar. All data from SEC EDGAR public filings.
About institutional & insider ownership
Fractyl Health, Inc. Common Stock (GUTS) is primarily owned by institutional investors, who hold approximately 100.0% of total shares outstanding. Company insiders own approximately 59.30%, while retail and public investors account for the remaining 0.00%.
The largest institutional shareholder of Fractyl Health, Inc. Common Stock is NANTAHALA CAPITAL MANAGEMENT, LLC, holding approximately 12.14 million shares — equal to 18.77% of outstanding shares — as of September 30, 2025.
A total of 74 institutional investors currently hold GUTS stock, with a combined institutional value of approximately $145,551,915 as of the most recent 13F filing period.
Frequently asked questions
GUTS ownershipFractyl Health, Inc. Common Stock (GUTS) is primarily owned by institutional investors, who hold approximately 100.0% of shares. The largest shareholder is NANTAHALA CAPITAL MANAGEMENT, LLC with a 18.77% stake. Company insiders hold 59.30%. Data sourced from SEC Form 13F as of September 30, 2025.