GOSSAMER BIO INC (GOSS)
Institutional ownership reported to the SEC as of Q2 2026, across 30 quarters.
170
Reporting holders
$61.4M
Reported value
76.0%
Of shares outstanding
0.7%
Held as options
-15
Holder change
Institutions report 371,407,789 shares against 488,846,722 outstanding. Shares only - option lines are excluded, which is why this can be compared with the company at all. The count comes from the cover page of the company's own most recent report, so it is dated when that was filed rather than at quarter end.
Options share is the part of reported value carried in derivative lines rather than shares. A high figure means institutions are expressing a view on this security without owning much of it.
Holders
| Filer | Value | Shares | Their book | Held | Change |
|---|---|---|---|---|---|
| D. E. Shaw & Co., Inc. | $6.7M | 40,959,285 | 0.00% | 5q | +10417.7%+$6.7M |
| 683 Capital Management, LLC | $6.5M | 39,198,868 | 0.32% | 12q | +684.0%+$5.6M |
| DeepCurrents Investment Group LLC | $6.0M | 37,665,073 | 0.18% | new | NEW |
| Context Capital Management, LLC | $4.8M | 28,946,459 | 0.09% | new | NEW |
| Worth Venture Partners, LLC | $4.1M | 25,017,881 | 9.29% | new | NEW |
| Kalehua Capital Management LLC | $3.7M | 22,298,726 | 1.17% | 2q | +25.9%+$755.6K |
| AQR CAPITAL MANAGEMENT LLC | $2.6M | 15,629,993 | 0.00% | 4q | +54.3%+$905.8K |
| WOLVERINE ASSET MANAGEMENT LLC | $2.1M | 12,894,746 | 0.02% | 2q | HELD |
| RENAISSANCE TECHNOLOGIES LLC | $1.9M | 11,629,896 | 0.00% | 11q | +854.9%+$1.7M |
| Corient Private Wealth LP | $1.9M | 11,251,018 | 0.00% | 15q | +182.3%+$1.2M |
| VANGUARD CAPITAL MANAGEMENT LLC | $1.6M | 9,416,023 | 0.00% | 2q | HELD |
| ARCH Venture Management, LLC | $1.3M | 8,055,916 | 0.12% | 12q | HELD |
| BARCLAYS PLC | $1.3M | 7,832,522 | 0.00% | 17q | +155.5%+$784.6K |
| Octagon Capital Advisors LP | $1.3M | 7,750,000 | 0.11% | 23q | HELD |
| BlackRock, Inc. | $1.3M | 7,669,943 | 0.00% | 8q | -54.4%-$1.5M |
| ARROWSTREET CAPITAL, LIMITED PARTNERSHIP | $1.2M | 7,573,388 | 0.00% | new | NEW |
| TWO SIGMA INVESTMENTS, LP | $1.2M | 7,432,001 | 0.00% | 26q | +55.5%+$436.4K |
| SAMSARA BIOCAPITAL, LLC | $1.2M | 7,222,559 | 0.10% | 12q | HELD |
| Qube Research & Technologies Ltd | $1.2M | 7,065,756 | 0.00% | 11q | +43.7%+$353.6K |
| Siren, L.L.C. | $857.4K | 5,208,968 | 0.02% | 8q | HELD |
| HHLR ADVISORS, LTD. | $818.7K | 4,974,041 | 0.10% | 30q | HELD |
| UBS Group AG | $510.5K | 3,093,785 | 0.00% | 24q | +64.2%+$199.7K |
| Squarepoint Ops LLC | $420.8K | 2,556,378 | 0.00% | 3q | -24.8%-$138.7K |
| GEODE CAPITAL MANAGEMENT, LLC | $408.7K | 2,481,605 | 0.00% | 30q | -49.8%-$404.8K |
| MILLENNIUM MANAGEMENT LLC | $395.5K | 2,402,633 | 0.00% | 27q | +1182.0%+$364.6K |
| MB Generational Wealth, LLC | $365.0K | 2,217,451 | 0.18% | 4q | +44.7%+$112.8K |
| JACOBS LEVY EQUITY MANAGEMENT, INC | $360.0K | 2,187,402 | 0.00% | 11q | +29.0%+$81.0K |
| MARSHALL WACE, LLP | $338.4K | 2,114,988 | 0.00% | new | NEW |
| Alyeska Investment Group, L.P. | $337.7K | 2,051,442 | 0.00% | 9q | HELD |
| HSBC HOLDINGS PLC | $267.4K | 1,583,118 | 0.00% | 2q | +1289.4%+$248.1K |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | $256.3K | 383,049 | 0.00% | 28q | +182.1%+$165.5K |
| Ensign Peak Advisors, Inc | $238.8K | 1,450,979 | 0.00% | 2q | -57.4%-$321.5K |
| VANGUARD FIDUCIARY TRUST CO | $205.5K | 1,245,392 | 0.00% | 2q | -11.3%-$26.2K |
| JPMORGAN CHASE & CO | $201.5K | 1,228,634 | 0.00% | 10q | +1225.5%+$186.3K |
| DEUTSCHE BANK AG\ | $188.1K | 1,106,441 | 0.00% | 11q | -15.3%-$33.9K |
| GOLDMAN SACHS GROUP INC | $185.7K | 1,128,451 | 0.00% | 27q | -4.4%-$8.6K |
| STATE STREET CORP | $183.5K | 1,114,718 | 0.00% | 30q | -74.6%-$538.8K |
| Hennion & Walsh Asset Management, Inc. | $180.9K | 1,098,914 | 0.01% | 3q | +32.6%+$44.5K |
| NEA Management Company, LLC | $164.6K | 1,000,000 | 0.01% | 16q | HELD |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC | $163.4K | 992,527 | 0.00% | 30q | -34.3%-$85.2K |
| Sixth Street Partners Management Company, L.P. | $163.4K | 992,527 | 0.00% | new | NEW |
| SIMPLEX TRADING, LLC | $154.3K | options only | 0.00% | 23q | OPTIONS |
| SMITH, MOORE & CO. | $148.1K | 900,000 | 0.01% | 16q | +91.5%+$70.8K |
| Ishara Investments LP | $135.0K | 820,000 | 0.10% | 2q | HELD |
| PANAGORA ASSET MANAGEMENT INC | $120.7K | 733,216 | 0.00% | 4q | +56.0%+$43.3K |
| MERCER GLOBAL ADVISORS INC /ADV | $98.1K | 595,726 | 0.00% | 4q | +214.7%+$66.9K |
| Mariner, LLC | $97.9K | 594,719 | 0.00% | 4q | +42.1%+$29.0K |
| IEQ CAPITAL, LLC | $97.3K | 591,254 | 0.00% | 3q | +50.2%+$32.5K |
| VANGUARD PORTFOLIO MANAGEMENT LLC | $89.8K | 544,212 | 0.00% | 2q | -74.8%-$266.8K |
| CHOREO, LLC | $88.9K | 540,111 | 0.00% | 9q | +115.9%+$47.7K |
| TUDOR INVESTMENT CORP ET AL | $78.9K | 479,581 | 0.00% | 14q | +316.2%+$60.0K |
| NORTHERN TRUST CORP | $75.5K | 458,498 | 0.00% | 30q | -67.5%-$156.4K |
| Invesco Ltd. | $72.8K | 442,268 | 0.00% | 6q | -4.9%-$3.7K |
| BANK OF AMERICA CORP /DE/ | $65.1K | 396,727 | 0.00% | 30q | -87.5%-$455.4K |
| Merit Financial Group, LLC | $55.8K | 339,192 | 0.00% | 4q | +119.6%+$30.4K |
| LPL Financial LLC | $54.7K | 332,534 | 0.00% | 5q | -10.5%-$6.5K |
| GROUP ONE TRADING LLC | $45.8K | 110,927 | 0.00% | 28q | +32.7%+$11.3K |
| WADDELL & ASSOCIATES, LLC | $43.1K | 261,798 | 0.00% | 2q | +287.6%+$32.0K |
| MORGAN STANLEY | $39.8K | 241,591 | 0.00% | 30q | -34.2%-$20.7K |
| CITADEL ADVISORS LLC | $38.0K | options only | 0.00% | 30q | OPTIONS |
| PRUDENTIAL FINANCIAL INC | $37.5K | 227,550 | 0.00% | 8q | +306.9%+$28.2K |
| ADAR1 Capital Management, LLC | $35.0K | 212,531 | 0.00% | 11q | -26.1%-$12.3K |
| Creative Planning | $34.9K | 211,955 | 0.00% | 4q | +68.7%+$14.2K |
| EVENTIDE ASSET MANAGEMENT, LLC | $26.8K | 163,440 | 0.00% | new | NEW |
| Cerity Partners LLC | $26.4K | 160,399 | 0.00% | 6q | +50.6%+$8.9K |
| Sivia Capital Partners, LLC | $25.1K | 152,298 | 0.00% | 10q | +66.1%+$10.0K |
| Tower Research Capital LLC (TRC) | $23.8K | 144,473 | 0.00% | 6q | +297.5%+$17.8K |
| HighTower Advisors, LLC | $23.8K | 144,358 | 0.00% | 4q | +120.0%+$13.0K |
| JANE STREET GROUP, LLC | $22.2K | options only | 0.00% | 7q | OPTIONS |
| WEALTH ENHANCEMENT ADVISORY SERVICES, LLC | $22.0K | 153,902 | 0.00% | 4q | +48.8%+$7.2K |
| Schonfeld Strategic Advisors LLC | $21.9K | 132,888 | 0.00% | new | NEW |
| FMR LLC | $21.5K | 130,325 | 0.00% | 20q | +478.8%+$17.7K |
| Russell Investments Group, Ltd. | $19.9K | 121,039 | 0.00% | 4q | -16.7%-$4.0K |
| OSAIC HOLDINGS, INC. | $19.2K | 120,204 | 0.00% | 26q | +8843.8%+$19.0K |
| Arax Advisory Partners | $17.8K | 108,204 | 0.00% | new | NEW |
| BCV Asset Management Inc. | $17.5K | 106,500 | 0.00% | 2q | HELD |
| Rockefeller Capital Management L.P. | $17.4K | 105,866 | 0.00% | 4q | -1.6% |
| Balyasny Asset Management L.P. | $17.2K | 104,232 | 0.00% | 4q | -98.2%-$957.7K |
| COMMONWEALTH EQUITY SERVICES, LLC | $16.8K | 101,993 | 0.00% | 11q | -7.3%-$1.3K |
| Quarry LP | $16.5K | 100,000 | 0.00% | 2q | HELD |
| Focus Partners Wealth | $15.3K | 92,848 | 0.00% | 2q | +27.2%+$3.3K |
| RHUMBLINE ADVISERS | $14.6K | 88,599 | 0.00% | 5q | -59.1%-$21.1K |
| CAPTRUST FINANCIAL ADVISORS | $13.5K | 81,778 | 0.00% | 2q | +42.2%+$4.0K |
| Vanguard Global Advisers, LLC | $13.1K | 79,682 | 0.00% | 2q | HELD |
| BNP PARIBAS FINANCIAL MARKETS | $12.1K | 73,693 | 0.00% | 29q | -22.9%-$3.6K |
| Caprock Group, LLC | $11.5K | 70,000 | 0.00% | 3q | HELD |
| Velan Capital Investment Management LP | $11.5K | 70,000 | 0.01% | 7q | HELD |
| AlphaCore Capital LLC | $11.4K | 69,482 | 0.00% | 3q | +31.1%+$2.7K |
| Bronte Capital Management Pty Ltd. | $11.2K | 67,754 | 0.00% | new | NEW |
| TWO SIGMA SECURITIES, LLC | $9.6K | 58,064 | 0.00% | new | NEW |
| Integrated Wealth Concepts LLC | $9.1K | 55,533 | 0.00% | 2q | +285.0%+$6.8K |
| Bull Harbor Capital LLC | $8.4K | 51,235 | 0.00% | 2q | +64.2%+$3.3K |
| Beacon Pointe Advisors, LLC | $7.9K | 48,000 | 0.00% | 3q | +71.4%+$3.3K |
| Bank of New York Mellon Corp | $7.5K | 45,713 | 0.00% | 30q | -89.3%-$63.0K |
| Y-Intercept (Hong Kong) Ltd | $7.1K | 43,210 | 0.00% | new | NEW |
| Prospera Financial Services Inc | $6.9K | 42,123 | 0.00% | new | NEW |
| Skaana Management L.P. | $6.6K | 40,200 | 0.00% | 2q | HELD |
| Curi Capital, LLC | $6.5K | 39,784 | 0.00% | 3q | +6.8% |
| Vanguard Personalized Indexing Management, LLC | $6.4K | 39,060 | 0.00% | 10q | +122.8%+$3.5K |
| StoneX Group Inc. | $6.2K | 27,556 | 0.00% | new | NEW |
Five percent filings
Anyone crossing 5% of a company must say so within days - far sooner than the next quarterly holdings report. A 13D declares an intent to influence the company; a 13G is the passive version. See all activist filings →
| Filed | Form | Filer | % of class |
|---|---|---|---|
| 2026-07-29 | 13G | Opaleye Management Inc.with 2 co-filers | 5.1% |
| 2026-07-29 | 13G/A | BlackRock, Inc. | 1.0% |
| 2026-07-24 | 13D/A | D. E. Shaw & Co., L.P.with 3 co-filers | 7.1% |
| 2026-07-01 | 13D/A | D. E. Shaw & Co., L.P.with 3 co-filers | 8.3% |
Quarter by quarter
Coverage begins with the quarter ending 2018-12-31. Earlier filings exist only as occasional late amendments, too sparse to describe a market, so they are not shown.
| Quarter | Holders | Value | Shares | New | Added | Trimmed | Options |
|---|---|---|---|---|---|---|---|
| Q2 2026 | 170 | $61.4M | 371,407,789 | 28 | 57 | 42 | 0.7% |
| Q1 2026 | 185 | $57.8M | 169,940,499 | 42 | 67 | 49 | 2.5% |
| Q4 2025 | 194 | $603.8M | 183,416,674 | 46 | 64 | 42 | 6.0% |
| Q3 2025 | 163 | $483.7M | 174,817,828 | 54 | 43 | 44 | 5.0% |
| Q2 2025 | 122 | $212.0M | 169,193,587 | 31 | 37 | 25 | 1.8% |
| Q1 2025 | 113 | $181.0M | 162,219,745 | 24 | 29 | 28 | 1.4% |
| Q4 2024 | 99 | $151.4M | 165,909,798 | 12 | 28 | 24 | 0.9% |
| Q3 2024 | 95 | $163.9M | 165,099,506 | 13 | 20 | 28 | 0.6% |
| Q2 2024 | 91 | $158.2M | 174,610,923 | 11 | 27 | 27 | 0.6% |
| Q1 2024 | 100 | $236.8M | 199,651,286 | 20 | 24 | 26 | 0.5% |
| Q4 2023 | 94 | $184.3M | 209,008,384 | 14 | 32 | 22 | 1.9% |
| Q3 2023 | 95 | $167.9M | 197,865,609 | 34 | 30 | 17 | 1.8% |
| Q2 2023 | 91 | $62.5M | 50,742,506 | 13 | 14 | 42 | 2.6% |
| Q1 2023 | 92 | $78.2M | 60,296,188 | 20 | 23 | 33 | 2.8% |
| Q4 2022 | 99 | $197.1M | 90,155,782 | 15 | 38 | 32 | 0.7% |
| Q3 2022 | 162 | $1.0B | 85,227,044 | 45 | 62 | 34 | 2.3% |
| Q2 2022 | 131 | $545.2M | 63,701,333 | 22 | 34 | 49 | 2.2% |
| Q1 2022 | 140 | $537.5M | 59,881,447 | 24 | 43 | 41 | 3.3% |
| Q4 2021 | 133 | $675.4M | 58,956,265 | 16 | 41 | 39 | 1.3% |
| Q3 2021 | 127 | $698.5M | 54,748,478 | 23 | 32 | 32 | 1.5% |
| Q2 2021 | 115 | $434.6M | 53,089,156 | 17 | 32 | 35 | 0.8% |
| Q1 2021 | 124 | $509.5M | 54,257,159 | 19 | 32 | 41 | 1.5% |
| Q4 2020 | 121 | $525.7M | 53,418,714 | 20 | 47 | 29 | 1.7% |
| Q3 2020 | 123 | $697.7M | 55,539,544 | 21 | 48 | 29 | 1.2% |
| Q2 2020 | 111 | $686.3M | 52,506,942 | 28 | 58 | 14 | 0.4% |
| Q1 2020 | 96 | $415.2M | 40,434,037 | 18 | 25 | 29 | 1.1% |
| Q4 2019 | 94 | $657.9M | 40,942,996 | 21 | 30 | 20 | 2.7% |
| Q3 2019 | 84 | $729.5M | 41,339,705 | 21 | 41 | 14 | 4.9% |
| Q2 2019 | 74 | $812.8M | 36,689,376 | 16 | 25 | 19 | 0.0% |
| Q1 2019 | 71 | $776.3M | 35,897,641 | 71 | 0 | 0 | 0.0% |