Gossamer BioGOSS
13F holders, Q2 2025 (June 30)123holders +5
33new positions
28sold out
5famous investors
$1.23avg. 13F price*
At the end of Q2 2025, 123 institutions reported holding Gossamer Bio Inc. (GOSS) in their 13F filings, up 5 from Q1 2025. 33 opened new positions and 28 sold out. The largest holders were Octagon Capital Advisors LP ($22.6M), NEA Management Company, LLC ($22.3M) and BlackRock, Inc. ($14.9M). 5 famous investors held it, including Jim Simons / Peter Brown (0.0% of Renaissance Technologies's portfolio), Ken Griffin (0.0% of Citadel Advisors's portfolio) and Israel Englander (0.0% of Millennium Management's portfolio).
- Company
- Gossamer Bio Inc.
- CUSIP
- 38341P102
- Latest filing quarter
- Q2 2026
History
Number of 13F holders
Total Exit/New Position Q1 2025 → Q2 2025
| Institutions | Total Value | |
|---|---|---|
| New Positions | 33 | $3.2M |
| Exits | 28 | $6.9M |
All 13F filers, Q1 2025 → Q2 2025: 27,038,658 shares bought and 19,834,070 shares sold, net +7,204,588 shares. Counts holders who added, trimmed, opened or closed a position; split-adjusted.
Ownership 123 holders
| Octagon Capital Advisors LP | 4.96% | No change | 18,350,000 | $22.6M |
| NEA Management Company, LLC | 1.68% | No change | 18,093,034 | $22.3M |
| BlackRock, Inc. | 0.00% | Add +295.2% | 12,142,596 | $14.9M |
| Vanguard Group Inc. | 0.00% | Add +13.2% | 11,410,792 | $14.0M |
| ARCH Venture Management, LLC | 3.31% | No change | 8,055,916 | $9.9M |
| FMR LLC | 0.00% | Reduce -3.7% | 7,315,325 | $9.0M |
| Acadian Asset Management LLC | 0.02% | Add +12.4% | 7,146,022 | $8.8M |
| 683 Capital Management, LLC | 0.84% | Add +3.9% | 6,340,000 | $7.8M |
| Samsara Biocapital, LLC | 1.54% | No change | 6,130,268 | $7.5M |
| Palo Alto Investors LP | 1.50% | Reduce -8.6% | 5,739,013 | $7.1M |
| Siren, L.L.C. | 0.33% | No change | 5,208,968 | $6.4M |
| Silverarc Capital Management, LLC | 1.30% | Reduce -18.6% | 5,146,782 | $6.3M |
| HHLR Advisors, LTD. | 0.20% | No change | 4,974,041 | $6.1M |
| Geode Capital Management, LLC | 0.00% | Add +100.5% | 4,555,080 | $5.6M |
| Alyeska Investment Group, L.P. | 0.02% | Add +7.1% | 4,459,087 | $5.5M |
| Corient Private Wealth LP | 0.01% | Add +8.9% | 3,693,683 | $4.5M |
| Monaco Asset Management SAM | 1.65% | Reduce -26.8% | 3,550,000 | $4.4M |
| Opaleye Management Inc. | 0.90% | Reduce -17.3% | 3,545,000 | $4.4M |
| Rock Springs Capital Management LP | 0.25% | No change | 3,266,960 | $4.0M |
| Renaissance Technologies | 0.00% | Add +74.1% | 2,732,294 | $3.4M |
| State Street Corp. | 0.00% | Add +181.1% | 2,481,406 | $3.1M |
| Deutsche Bank AG | 0.00% | Add +7.0% | 2,261,455 | $2.8M |
| Two Sigma Investments, LP | 0.00% | Add +36.8% | 1,745,127 | $2.1M |
| Eversept Partners, LP | 0.21% | Reduce -56.5% | 1,695,762 | $2.1M |
| Two Sigma Advisers, LP | 0.00% | Add +29.9% | 1,672,200 | $2.1M |
| Charles Schwab Investment Management Inc. | 0.00% | Add +42.4% | 1,621,419 | $2.0M |
| Northern Trust Corp. | 0.00% | Add +270.7% | 1,520,126 | $1.9M |
| Platinum Investment Management Ltd. | 0.11% | Reduce -20.1% | 1,383,863 | $1.7M |
| Laurion Capital Management LP | 0.20% | Reduce -13.4% | 1,343,772 | $1.7M |
| Focus Partners Wealth | 0.00% | Add +64.3% | 1,150,000 | $1.4M |
| Arrowstreet Capital, Limited Partnership | 0.00% | Add +39.1% | 1,117,972 | $1.4M |
| Exome Asset Management LLC | 1.11% | No change | 1,097,999 | $1.4M |
| Jacobs Levy Equity Management, Inc. | 0.01% | Add +286.7% | 1,091,564 | $1.3M |
| Schonfeld Strategic Advisors LLC | 0.01% | Add +344.9% | 897,388 | $1.1M |
| DAFNA Capital Management LLC | 0.29% | Reduce -6.4% | 849,921 | $1.0M |
| Morgan Stanley | 0.00% | Add +78.2% | 818,691 | $1.0M |
| Citadel Advisors | 0.00% | Add +389.1% | 767,561 | $944K |
| Gsa Capital Partners LLP | 0.07% | Add +9.3% | 760,448 | $935K |
| Atom Investors LP | 0.08% | Add +4.0% | 730,357 | $898K |
| Mackenzie Financial Corp. | 0.00% | Add +56.9% | 553,064 | $680K |
| Highbridge Capital Management LLC | 0.10% | No change | 497,694 | $612K |
| Millennium Management | 0.00% | Reduce -81.5% | 496,248 | $610K |
| Woodline Partners LP | 0.00% | Reduce -32.0% | 495,153 | $609K |
| Bridgeway Capital Management, LLC | 0.01% | Reduce -13.4% | 485,900 | $598K |
| Ameriprise Financial Inc. | 0.00% | New | 434,049 | $534K |
| Bank of New York Mellon Corp | 0.00% | Add +1812.6% | 386,708 | $476K |
| Susquehanna International Group, LLP | 0.00% | Reduce -86.9% | 382,677 | $471K |
| Prelude Capital Management, LLC | 0.04% | Reduce -0.7% | 374,169 | $460K |
| Silverback Asset Management LLC | 1.72% | New | 350,000 | $431K |
| Barclays PLC | 0.00% | Add +38.2% | 338,792 | $417K |
| UBS Group AG | 0.00% | Add +42.0% | 312,742 | $385K |
| Smith, Moore & Co. | 0.03% | No change | 300,000 | $369K |
| Qube Research & Technologies Ltd | 0.00% | Reduce -72.1% | 249,784 | $307K |
| Nuveen, LLC | 0.00% | New | 246,864 | $304K |
| Invesco Ltd. | 0.00% | Add +447.5% | 239,245 | $294K |
| Group One Trading LLC | 0.01% | Add +12.2% | 233,170 | $287K |
| Rhumbline Advisers | 0.00% | New | 231,049 | $284K |
| ADAR1 Capital Management, LLC | 0.05% | No change | 227,228 | $279K |
| Goldman Sachs Group Inc. | 0.00% | Reduce -82.9% | 160,695 | $198K |
| Birchview Capital, LP | 0.17% | No change | 138,176 | $170K |
| Alps Advisors Inc. | 0.00% | New | 122,644 | $151K |
| Sequoia Financial Advisors, LLC | 0.00% | No change | 118,500 | $146K |
| MetLife Investment Management, LLC | 0.00% | New | 115,813 | $142K |
| Victory Capital Management Inc. | 0.00% | Reduce -59.9% | 105,961 | $130K |
| State of Wyoming | 0.02% | New | 105,175 | $129K |
| MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd. | 0.00% | New | 103,947 | $128K |
| XTX Topco Ltd | 0.01% | New | 98,976 | $122K |
| Intech Investment Management LLC | 0.00% | New | 98,303 | $121K |
| Wells Fargo & Company | 0.00% | Add +2127.8% | 98,157 | $121K |
| T. Rowe Price Associates Inc. | 0.00% | Add +47.1% | 95,291 | $118K |
| Quadrature Capital Ltd | 0.00% | New | 95,796 | $117K |
| JPMorgan Chase & Co. | 0.00% | Add +479.0% | 90,447 | $111K |
| Diametric Capital, LP | 0.06% | Reduce -7.0% | 89,382 | $110K |
| Royal Bank of Canada | 0.00% | Add +10630.9% | 82,199 | $101K |
| New York State Common Retirement Fund | 0.00% | New | 77,000 | $95K |
| Choreo, LLC | 0.00% | Add +58.2% | 76,111 | $94K |
| Velan Capital Investment Management LP | 0.09% | No change | 75,000 | $92K |
| Manufacturers Life Insurance Company, The | 0.00% | New | 72,061 | $89K |
| Citigroup Inc. | 0.00% | Add +531.5% | 67,434 | $83K |
| Bank of America Corp. | 0.00% | Reduce -59.1% | 67,080 | $83K |
| LPL Financial LLC | 0.00% | New | 67,000 | $82K |
| Lazard Asset Management LLC | 0.00% | Add +53.9% | 67,362 | $82K |
| D. E. Shaw & Co. | 0.00% | New | 56,808 | $70K |
| Voya Investment Management LLC | 0.00% | New | 54,428 | $67K |
| Prudential Financial Inc. | 0.00% | Add +7.2% | 50,415 | $62K |
| Graham Capital Management, L.P. | 0.00% | Add +61.8% | 46,894 | $58K |
| Tudor Investment Corporation | 0.00% | No change | 46,464 | $57K |
| Police & Firemen's Retirement System of New Jersey | 0.00% | New | 42,915 | $53K |
| ProShare Advisors LLC | 0.00% | New | 38,946 | $48K |
| Commonwealth Equity Services, LLC | 0.00% | Reduce -16.3% | 35,271 | $43K |
| Sivia Capital Partners, LLC | 0.01% | No change | 30,018 | $37K |
| Osaic Holdings, Inc. | 0.00% | Add +2.4% | 28,149 | $35K |
| Alliancebernstein L.P. | 0.00% | New | 26,420 | $32K |
| Silvercrest Asset Management Group LLC | 0.00% | No change | 26,158 | $32K |
| Caption Management, LLC | 0.00% | New | 25,480 | $31K |
| Drive Wealth Management, LLC | 0.01% | Add +52.8% | 25,474 | $31K |
| US Bancorp \de | 0.00% | Reduce -28.0% | 24,100 | $30K |
| Clearstead Advisors, LLC | 0.00% | Add +7.0% | 23,550 | $29K |
| Cibc World Markets Corp. | 0.00% | New | 23,401 | $29K |
| Banco BTG Pactual S.A. | 0.01% | New | 22,009 | $27K |
"% of holder's portfolio" is GOSS's weight in each manager's 13F, not the share of Gossamer Bio Inc. the manager owns.