Gossamer BioGOSS
13F holders, Q3 2025 (September 30)164holders +41
54new positions
14sold out
6famous investors
$2.63avg. 13F price*
At the end of Q3 2025, 164 institutions reported holding Gossamer Bio Inc. (GOSS) in their 13F filings, up 41 from Q2 2025. 54 opened new positions and 14 sold out. The largest holders were NEA Management Company, LLC ($47.6M), Octagon Capital Advisors LP ($44.8M) and BlackRock, Inc. ($36.4M). 6 famous investors held it, including Jim Simons / Peter Brown (0.0% of Renaissance Technologies's portfolio), Israel Englander (0.0% of Millennium Management's portfolio) and Ken Griffin (0.0% of Citadel Advisors's portfolio).
- Company
- Gossamer Bio Inc.
- CUSIP
- 38341P102
- Latest filing quarter
- Q2 2026
History
Number of 13F holders
Total Exit/New Position Q2 2025 → Q3 2025
| Institutions | Total Value | |
|---|---|---|
| New Positions | 54 | $31.7M |
| Exits | 14 | $5.8M |
All 13F filers, Q2 2025 → Q3 2025: 30,471,504 shares bought and 28,609,892 shares sold, net +1,861,612 shares. Counts holders who added, trimmed, opened or closed a position; split-adjusted.
Ownership 164 holders
| NEA Management Company, LLC | 2.61% | No change | 18,093,034 | $47.6M |
| Octagon Capital Advisors LP | 7.00% | Reduce -7.1% | 17,050,000 | $44.8M |
| BlackRock, Inc. | 0.00% | Add +14.0% | 13,846,054 | $36.4M |
| Vanguard Group Inc. | 0.00% | Add +5.3% | 12,009,773 | $31.6M |
| ARCH Venture Management, LLC | 4.30% | No change | 8,055,916 | $21.2M |
| Samsara Biocapital, LLC | 2.11% | No change | 6,130,268 | $16.1M |
| Palo Alto Investors LP | 2.66% | Reduce -4.8% | 5,464,349 | $14.4M |
| Siren, L.L.C. | 0.54% | No change | 5,208,968 | $13.7M |
| 683 Capital Management, LLC | 1.27% | Reduce -20.2% | 5,059,200 | $13.3M |
| Acadian Asset Management LLC | 0.02% | Reduce -29.9% | 5,012,969 | $13.2M |
| HHLR Advisors, LTD. | 0.32% | No change | 4,974,041 | $13.1M |
| Silverarc Capital Management, LLC | 1.82% | Reduce -7.1% | 4,779,082 | $12.6M |
| Geode Capital Management, LLC | 0.00% | Add +3.0% | 4,689,531 | $12.3M |
| FMR LLC | 0.00% | Reduce -44.1% | 4,085,346 | $10.7M |
| State Street Corp. | 0.00% | Add +56.5% | 3,883,667 | $10.2M |
| Perceptive Advisors LLC | 0.29% | New | 3,812,797 | $10.0M |
| Millennium Management | 0.01% | Add +629.3% | 3,619,329 | $9.5M |
| Rock Springs Capital Management LP | 0.50% | No change | 3,266,960 | $8.6M |
| Renaissance Technologies | 0.01% | Add +9.1% | 2,980,188 | $7.8M |
| Bank of America Corp. | 0.00% | Add +4196.2% | 2,881,904 | $7.6M |
| UBS Group AG | 0.00% | Add +785.7% | 2,770,046 | $7.3M |
| Opaleye Management Inc. | 1.02% | Reduce -23.1% | 2,725,000 | $7.2M |
| Two Sigma Investments, LP | 0.01% | Add +31.1% | 2,287,251 | $6.0M |
| Citadel Advisors | 0.00% | Add +197.6% | 2,284,216 | $6.0M |
| Alyeska Investment Group, L.P. | 0.02% | Reduce -57.2% | 1,909,087 | $5.0M |
| Two Sigma Advisers, LP | 0.01% | Add +11.8% | 1,870,100 | $4.9M |
| Charles Schwab Investment Management Inc. | 0.00% | Add +6.7% | 1,729,634 | $4.5M |
| Northern Trust Corp. | 0.00% | Reduce -1.6% | 1,495,403 | $3.9M |
| MB Generational Wealth, LLC | 2.36% | — | 1,414,824 | $3.7M |
| Jacobs Levy Equity Management, Inc. | 0.01% | Add +29.0% | 1,408,118 | $3.7M |
| Monaco Asset Management SAM | 1.37% | Reduce -61.1% | 1,379,416 | $3.6M |
| Focus Partners Wealth | 0.01% | Add +15.2% | 1,325,198 | $3.5M |
| Deutsche Bank AG | 0.00% | Reduce -43.5% | 1,278,921 | $3.4M |
| Nuveen, LLC | 0.00% | Add +336.3% | 1,077,135 | $2.8M |
| Jain Global LLC | 0.04% | New | 1,054,356 | $2.8M |
| Royal Bank of Canada | 0.00% | Add +1118.5% | 1,001,606 | $2.6M |
| Eversept Partners, LP | 0.19% | Reduce -45.4% | 925,233 | $2.4M |
| Tang Capital Management LLC | 0.08% | New | 800,000 | $2.1M |
| Balyasny Asset Management L.P. | 0.00% | New | 770,574 | $2.0M |
| Platinum Investment Management Ltd. | 0.13% | Reduce -44.8% | 764,165 | $2.0M |
| Adage Capital Partners Gp, L.L.C. | 0.00% | New | 726,800 | $1.9M |
| Jane Street Group, LLC | 0.00% | New | 702,065 | $1.8M |
| Russell Investments Group, Ltd. | 0.00% | New | 685,049 | $1.8M |
| AQR Capital Management | 0.00% | New | 646,615 | $1.7M |
| Wellington Management Group LLP | 0.00% | New | 641,715 | $1.7M |
| Arrowstreet Capital, Limited Partnership | 0.00% | Reduce -43.2% | 635,397 | $1.7M |
| Morgan Stanley | 0.00% | Reduce -30.8% | 566,419 | $1.5M |
| Walleye Capital LLC | 0.01% | New | 545,679 | $1.4M |
| Silverback Asset Management LLC | 3.73% | Add +42.9% | 500,000 | $1.3M |
| Woodline Partners LP | 0.01% | No change | 495,153 | $1.3M |
| Exome Asset Management LLC | 0.78% | Reduce -58.9% | 451,699 | $1.2M |
| Bank of New York Mellon Corp | 0.00% | Add +15.9% | 448,211 | $1.2M |
| Invesco Ltd. | 0.00% | Add +47.2% | 352,086 | $926K |
| Bridgeway Capital Management, LLC | 0.02% | Reduce -30.9% | 335,900 | $883K |
| Mackenzie Financial Corp. | 0.00% | Reduce -44.1% | 309,050 | $813K |
| Goldman Sachs Group Inc. | 0.00% | Add +86.4% | 299,582 | $788K |
| Smith, Moore & Co. | 0.06% | Reduce -6.7% | 280,000 | $736K |
| Informed Momentum Co LLC | 0.08% | New | 278,422 | $732K |
| XTX Topco Ltd | 0.04% | Add +177.6% | 274,782 | $723K |
| Barclays PLC | 0.00% | Reduce -19.8% | 271,706 | $715K |
| D. E. Shaw & Co. | 0.00% | Add +338.0% | 248,818 | $654K |
| Rhumbline Advisers | 0.00% | Reduce -2.6% | 225,060 | $592K |
| ADAR1 Capital Management, LLC | 0.06% | Reduce -6.5% | 212,531 | $559K |
| Qube Research & Technologies Ltd | 0.00% | Reduce -16.4% | 208,789 | $549K |
| Stonepine Capital Management, LLC | 0.44% | New | 204,770 | $539K |
| JPMorgan Chase & Co. | 0.00% | Add +114.9% | 194,369 | $511K |
| Gsa Capital Partners LLP | 0.04% | Reduce -74.9% | 190,815 | $502K |
| Cubist Systematic Strategies, LLC | 0.01% | New | 162,785 | $428K |
| LPL Financial LLC | 0.00% | Add +106.5% | 138,326 | $364K |
| Birchview Capital, LP | 0.27% | No change | 138,176 | $363K |
| Prelude Capital Management, LLC | 0.03% | Reduce -63.6% | 136,200 | $358K |
| Merit Financial Group, LLC | 0.00% | New | 134,688 | $354K |
| Atom Investors LP | 0.03% | Reduce -81.8% | 132,552 | $349K |
| Sequoia Financial Advisors, LLC | 0.00% | Reduce -0.8% | 117,500 | $309K |
| Wells Fargo & Company | 0.00% | Add +18.9% | 116,667 | $307K |
| Victory Capital Management Inc. | 0.00% | Reduce -0.7% | 105,226 | $277K |
| MetLife Investment Management, LLC | 0.00% | Reduce -12.3% | 101,513 | $267K |
| Intech Investment Management LLC | 0.00% | Add +2.6% | 100,847 | $265K |
| T. Rowe Price Associates Inc. | 0.00% | Add +5.6% | 100,658 | $265K |
| Alps Advisors Inc. | 0.00% | Reduce -19.1% | 99,155 | $261K |
| Alliancebernstein L.P. | 0.00% | Add +273.5% | 98,680 | $260K |
| BNP Paribas Financial Markets | 0.00% | Add +463.2% | 96,403 | $254K |
| HB Wealth Management, LLC | 0.00% | New | 94,748 | $249K |
| MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd. | 0.00% | Reduce -16.0% | 87,274 | $230K |
| Choreo, LLC | 0.00% | Add +11.8% | 85,111 | $224K |
| Quadrature Capital Ltd | 0.00% | Reduce -16.8% | 79,709 | $209K |
| Cambridge Investment Research Advisors, Inc. | 0.00% | Add +301.2% | 77,440 | $204K |
| Group One Trading LLC | 0.01% | Reduce -68.0% | 74,531 | $196K |
| Velan Capital Investment Management LP | 0.17% | Reduce -6.7% | 70,000 | $184K |
| Graham Capital Management, L.P. | 0.01% | Add +43.7% | 67,367 | $177K |
| Manufacturers Life Insurance Company, The | 0.00% | Reduce -9.3% | 65,379 | $172K |
| Sei Investments Co. | 0.00% | New | 61,186 | $161K |
| OMERS ADMINISTRATION Corp | 0.00% | New | 59,100 | $155K |
| Police & Firemen's Retirement System of New Jersey | 0.00% | Add +19.6% | 51,314 | $135K |
| EntryPoint Capital, LLC | 0.05% | New | 51,264 | $135K |
| Prudential Financial Inc. | 0.00% | Add +0.6% | 50,715 | $133K |
| Tudor Investment Corporation | 0.00% | Add +7.8% | 50,103 | $132K |
| Axq Capital, LP | 0.05% | New | 46,367 | $122K |
| New York State Common Retirement Fund | 0.00% | Reduce -43.4% | 43,600 | $115K |
| Commonwealth Equity Services, LLC | 0.00% | Add +21.0% | 42,671 | $112K |
"% of holder's portfolio" is GOSS's weight in each manager's 13F, not the share of Gossamer Bio Inc. the manager owns.