Gossamer Bio, Inc.
GOSS- Exchange
- Nasdaq
- Industry
- Pharmaceutical Preparations
- SEC CIK
- 0001728117
No open-market purchases or sales by Gossamer Bio, Inc. insiders were filed in the last 90 days; 170 institutions reported holding it in 13F filings for Q2 2026, worth $60.8M in total; HHLR Advisors (Hillhouse) is the only superinvestor holding it.
13F holders, Q3 2025
Institutional positions in Gossamer Bio, Inc. as of Sep 30, 2025. Investment managers with $100 million or more in US stocks report their long positions on Form 13F within 45 days after each quarter ends. How 13F works
- Institutional holders
- 164
- +41 vs. Q2 2025
- Shares held
- 180.1M
- +3.30M (+1.9%) vs. Q2 2025
- Total value
- $473.7M
- +$255.7M (+117.3%) vs. Q2 2025
- New holders
- 56
- 49 more added
- Sold out
- 15
- 44 more reduced
1 institution that held it in Q2 2025 haven't filed for Q3 2025 yet. Not filing isn't selling, so they aren't counted as sold out or in the changes above.
Compare with Q2 2025: new holders, sold out and not filed yet
Holders and value by quarter
Institutions reporting GOSS on Form 13F each quarter since Q1 2021, and the total value they reported. Values are as of each quarter end, so they also move with the share price.
| Quarter | Holders | Value |
|---|---|---|
| Q2 2026 | 170 | $60.8M |
| Q1 2026 | 185 | $56.3M |
| Q4 2025 | 195 | $573.4M |
| Q3 2025 | 164 | $473.7M |
| Q2 2025 | 124 | $218.0M |
| Q1 2025 | 119 | $186.9M |
| Q4 2024 | 105 | $155.0M |
| Q3 2024 | 100 | $172.6M |
| Q2 2024 | 94 | $164.7M |
| Q1 2024 | 109 | $233.5M |
| Q4 2023 | 98 | $192.0M |
| Q3 2023 | 96 | $171.2M |
| Q2 2023 | 99 | $74.4M |
| Q1 2023 | 111 | $97.9M |
| Q4 2022 | 120 | $225.1M |
| Q3 2022 | 160 | $1.02B |
| Q2 2022 | 129 | $533.2M |
| Q1 2022 | 141 | $519.8M |
| Q4 2021 | 133 | $664.9M |
| Q3 2021 | 128 | $687.7M |
| Q2 2021 | 115 | $431.1M |
| Q1 2021 | 123 | $501.9M |
Institutions, Q3 2025
Shares, value and share of portfolio for each institution holding Gossamer Bio, Inc.; share changes are against Q2 2025.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| Qube Research & Technologies Ltd | 208,789 | $549.1K | 0.00% | −40,995−16.4% | Reduced |
| ADAR1 Capital Management, LLC | 212,531 | $559.0K | 0.06% | −14,697−6.5% | Reduced |
| Rhumbline Advisers | 225,060 | $591.9K | 0.00% | −5,989−2.6% | Reduced |
| D. E. Shaw & Co., Inc. | 248,818 | $654.4K | 0.00% | +192,010+338.0% | Added |
| Barclays PLC | 271,706 | $714.6K | 0.00% | −67,086−19.8% | Reduced |
| XTX Topco Ltd | 274,782 | $722.7K | 0.04% | +175,806+177.6% | Added |
| EAM Investors, LLC | 278,422 | $732.3K | 0.08% | +278,422 | New |
| Smith, Moore & Co. | 280,000 | $736.4K | 0.06% | −20,000−6.7% | Reduced |
| Goldman Sachs Group Inc | 299,582 | $787.9K | 0.00% | +138,887+86.4% | Added |
| Mackenzie Financial Corp | 309,050 | $812.8K | 0.00% | −244,014−44.1% | Reduced |
| Bridgeway Capital Management, LLC | 335,900 | $883.4K | 0.02% | −150,000−30.9% | Reduced |
| Invesco Ltd. | 352,086 | $926.0K | 0.00% | +112,841+47.2% | Added |
| Bank of New York Mellon Corp | 448,211 | $1.18M | 0.00% | +61,503+15.9% | Added |
| Exome Asset Management LLC | 451,699 | $1.19M | 0.78% | −646,300−58.9% | Reduced |
| Woodline Partners LP | 495,153 | $1.30M | 0.01% | 00.0% | Unchanged |
| Silverback Asset Management LLC | 500,000 | $1.31M | 0.17% | +150,000+42.9% | Added |
| Walleye Capital LLC | 545,679 | $1.44M | 0.01% | +545,679 | New |
| Morgan Stanley | 566,419 | $1.49M | 0.00% | −252,272−30.8% | Reduced |
| Arrowstreet Capital, Limited Partnership | 635,397 | $1.67M | 0.00% | −482,575−43.2% | Reduced |
| Wellington Management Group LLP | 641,715 | $1.69M | 0.00% | +641,715 | New |
| AQR Capital Management LLC | 646,615 | $1.70M | 0.00% | +646,615 | New |
| Russell Investments Group, Ltd. | 685,049 | $1.80M | 0.00% | +685,049 | New |
| Jane Street Group, LLC | 702,065 | $1.85M | 0.00% | +702,065 | New |
| Adage Capital Partners GP, L.L.C. | 726,800 | $1.91M | 0.00% | +726,800 | New |
| Platinum Investment Management Ltd | 764,165 | $2.01M | 0.13% | −619,698−44.8% | Reduced |
| Balyasny Asset Management LLC | 770,574 | $2.03M | 0.00% | +770,574 | New |
| Tang Capital Management LLC | 800,000 | $2.10M | 0.08% | +800,000 | New |
| Eversept Partners, LP | 925,233 | $2.43M | 0.19% | −770,529−45.4% | Reduced |
| Royal Bank of Canada | 1,001,606 | $2.63M | 0.00% | +919,407+1,118.5% | Added |
| Jain Global LLC | 1,054,356 | $2.77M | 0.04% | +1,054,356 | New |
| Nuveen, LLC | 1,077,135 | $2.83M | 0.00% | +830,271+336.3% | Added |
| Deutsche Bank AG | 1,278,921 | $3.36M | 0.00% | −982,534−43.4% | Reduced |
| Colony Group, LLC | 1,325,198 | $3.49M | 0.01% | +175,198+15.2% | Added |
| Monaco Asset Management SAM | 1,379,416 | $3.63M | 1.35% | −2,170,584−61.1% | Reduced |
| Jacobs Levy Equity Management, Inc | 1,408,118 | $3.70M | 0.01% | +316,554+29.0% | Added |
| MB Generational Wealth, LLC | 1,414,824 | $3.72M | 2.36% | +1,414,824 | New |
| Northern Trust Corp | 1,495,403 | $3.93M | 0.00% | −24,723−1.6% | Reduced |
| Charles Schwab Investment Management Inc | 1,729,634 | $4.55M | 0.00% | +108,215+6.7% | Added |
| Two Sigma Advisers, LP | 1,870,100 | $4.92M | 0.01% | +197,900+11.8% | Added |
| Alyeska Investment Group, L.P. | 1,909,087 | $5.02M | 0.02% | −2,550,000−57.2% | Reduced |
| Citadel Advisors LLC | 2,284,216 | $6.01M | 0.00% | +1,516,655+197.6% | Added |
| Two Sigma Investments, LP | 2,287,251 | $6.02M | 0.01% | +542,124+31.1% | Added |
| Opaleye Management Inc. | 2,725,000 | $7.17M | 1.01% | −820,000−23.1% | Reduced |
| UBS Group AG | 2,770,046 | $7.29M | 0.00% | +2,457,304+785.7% | Added |
| Bank of America Corp | 2,881,904 | $7.58M | 0.00% | +2,814,824+4,196.2% | Added |
| Renaissance Technologies LLC | 2,980,188 | $7.84M | 0.01% | +247,894+9.1% | Added |
| Rock Springs Capital Management LP | 3,266,960 | $8.59M | 0.50% | 00.0% | Unchanged |
| Millennium Management LLC | 3,619,329 | $9.52M | 0.01% | +3,123,081+629.3% | Added |
| Perceptive Advisors LLC | 3,812,797 | $10.0M | 0.29% | +3,812,797 | New |
| State Street Corp | 3,883,667 | $10.2M | 0.00% | +1,402,261+56.5% | Added |
| FMR LLC | 4,085,346 | $10.7M | 0.00% | −3,229,979−44.2% | Reduced |
| Geode Capital Management, LLC | 4,689,531 | $12.3M | 0.00% | +134,451+3.0% | Added |
| Silverarc Capital Management, LLC | 4,779,082 | $12.6M | 1.82% | −367,700−7.1% | Reduced |
| HHLR Advisors, Ltd.SuperinvestorHHLR Advisors (Hillhouse) | 4,974,041 | $13.1M | 0.32% | 00.0% | Unchanged |
| Acadian Asset Management LLC | 5,012,969 | $13.2M | 0.02% | −2,133,053−29.8% | Reduced |
| 683 Capital Management, LLC | 5,059,200 | $13.3M | 1.21% | −1,280,800−20.2% | Reduced |
| Siren, L.L.C. | 5,208,968 | $13.7M | 0.54% | 00.0% | Unchanged |
| Palo Alto Investors LP | 5,464,349 | $14.4M | 2.66% | −274,664−4.8% | Reduced |
| Samsara BioCapital, LLC | 6,130,268 | $16.1M | 2.10% | 00.0% | Unchanged |
| ARCH Venture Management, LLC | 8,055,916 | $21.2M | 4.30% | 00.0% | Unchanged |
| Vanguard Group Inc | 12,009,773 | $31.6M | 0.00% | +598,981+5.2% | Added |
| BlackRock, Inc. | 13,846,054 | $36.4M | 0.00% | +1,703,458+14.0% | Added |
| Octagon Capital Advisors LP | 17,050,000 | $44.8M | 7.00% | −1,300,000−7.1% | Reduced |
| NEA Management Company, LLC | 18,093,034 | $47.6M | 2.61% | 00.0% | Unchanged |
| Laurion Capital Management LP | 0 | $0 | 0.00% | −1,343,772−100.0% | Sold out |
| Schonfeld Strategic Advisors LLC | 0 | $0 | 0.00% | −897,388−100.0% | Sold out |
| DAFNA Capital Management LLC | 0 | $0 | 0.00% | −849,921−100.0% | Sold out |
| Highbridge Capital Management LLC | 0 | $0 | 0.00% | −497,694−100.0% | Sold out |
| Ameriprise Financial Inc | 0 | $0 | 0.00% | −434,049−100.0% | Sold out |
| Opti Capital Management, LP | 0 | $0 | 0.00% | – | Sold out |
| Susquehanna International Group, LLP | 0 | $0 | 0.00% | −382,677−100.0% | Sold out |
| State of Wyoming | 0 | $0 | 0.00% | −105,175−100.0% | Sold out |
| Diametric Capital, LP | 0 | $0 | 0.00% | −89,382−100.0% | Sold out |
| Silvercrest Asset Management Group LLC | 0 | $0 | 0.00% | −26,158−100.0% | Sold out |
| Caption Management, LLC | 0 | $0 | 0.00% | −25,480−100.0% | Sold out |
| US Bancorp | 0 | $0 | 0.00% | −24,100−100.0% | Sold out |
| Banco BTG Pactual S.A. | 0 | $0 | 0.00% | −22,009−100.0% | Sold out |
| Dauntless Investment Group, LLC | 0 | $0 | 0.00% | −10,000−100.0% | Sold out |
| Raymond James Financial Inc | 0 | $0 | 0.00% | −270−100.0% | Sold out |
| CIBC World Markets Corp | – | – | – | – | Not filed |