GOSS Gossamer Bio, Inc.
Gossamer Bio, Inc. (GOSS) Institutional Ownership
What the institutions did with GOSS last quarter, from their 13F filings. Counting managers rather than shares is the point: a single index fund adding to a position tells you far less than four hundred separate managers all deciding to. Positions as reported for the quarter ended June 30, 2026.
Every manager below opens. Subscribers can see any firm's whole portfolio — every position, its weight, and what they bought, trimmed and exited last quarter.
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Each block is one manager, sized by shares held and colored by how much they moved the position last quarter. Green added, red cut, grey stood pat.
Largest holders
| Manager | Shares | % of reported |
|---|---|---|
| D. E. Shaw & Co., Inc. | 41.0M | 10.7% |
| 683 Capital Management, LLC | 39.2M | 10.3% |
| DeepCurrents Investment Group LLC | 37.7M | 9.9% |
| Context Capital Management, LLC | 28.9M | 7.6% |
| Worth Venture Partners, LLC | 25.0M | 6.6% |
| Kalehua Capital Management LLC | 22.3M | 5.8% |
| AQR CAPITAL MANAGEMENT LLC | 15.6M | 4.1% |
| GSA CAPITAL PARTNERS LLP | 15.0M | 3.9% |
| WOLVERINE ASSET MANAGEMENT LLC | 12.9M | 3.4% |
| RENAISSANCE TECHNOLOGIES LLC | 11.6M | 3.0% |
| VANGUARD CAPITAL MANAGEMENT LLC | 9.4M | 2.5% |
| ARCH Venture Management, LLC | 8.1M | 2.1% |
| BARCLAYS PLC | 7.8M | 2.1% |
| Octagon Capital Advisors LP | 7.8M | 2.0% |
| BlackRock, Inc. | 7.7M | 2.0% |
| ARROWSTREET CAPITAL, LIMITED PARTNERSHIP | 7.6M | 2.0% |
| TWO SIGMA INVESTMENTS, LP | 7.4M | 1.9% |
| SAMSARA BIOCAPITAL, LLC | 7.2M | 1.9% |
| Qube Research & Technologies Ltd | 7.1M | 1.9% |
| Corient Private Wealth LP | 5.6M | 1.5% |
| Siren, L.L.C. | 5.2M | 1.4% |
| HHLR ADVISORS, LTD. | 5.0M | 1.3% |
| UBS Group AG | 3.1M | 0.8% |
| Squarepoint Ops LLC | 2.6M | 0.7% |
| GEODE CAPITAL MANAGEMENT, LLC | 2.5M | 0.7% |
Largest changes
| Manager | Action | Previous | Current | Change |
|---|---|---|---|---|
| D. E. Shaw & Co., Inc. | Increased | 389.4K | 41.0M | +40.6M |
| DeepCurrents Investment Group LLC | New | 0 | 37.7M | +37.7M |
| 683 Capital Management, LLC | Increased | 5.0M | 39.2M | +34.2M |
| Context Capital Management, LLC | New | 0 | 28.9M | +28.9M |
| Worth Venture Partners, LLC | New | 0 | 25.0M | +25.0M |
| WOLVERINE ASSET MANAGEMENT LLC | New | 0 | 12.9M | +12.9M |
| GSA CAPITAL PARTNERS LLP | Increased | 3.3M | 15.0M | +11.7M |
| RENAISSANCE TECHNOLOGIES LLC | Increased | 1.2M | 11.6M | +10.4M |
| BlackRock, Inc. | Reduced | 16.8M | 7.7M | -9.2M |
| ARROWSTREET CAPITAL, LIMITED PARTNERSHIP | New | 0 | 7.6M | +7.6M |
| Balyasny Asset Management L.P. | Reduced | 5.9M | 104.2K | -5.8M |
| AQR CAPITAL MANAGEMENT LLC | Increased | 10.1M | 15.6M | +5.5M |
| BARCLAYS PLC | Increased | 3.1M | 7.8M | +4.8M |
| Kalehua Capital Management LLC | Increased | 17.7M | 22.3M | +4.6M |
| ACADIAN ASSET MANAGEMENT LLC | Reduced | 5.3M | 1.8M | -3.5M |
| STATE STREET CORP | Reduced | 4.4M | 1.1M | -3.3M |
| BANK OF AMERICA CORP /DE/ | Reduced | 3.2M | 396.7K | -2.8M |
| TWO SIGMA INVESTMENTS, LP | Increased | 4.8M | 7.4M | +2.7M |
| GEODE CAPITAL MANAGEMENT, LLC | Reduced | 4.9M | 2.5M | -2.5M |
| MILLENNIUM MANAGEMENT LLC | Increased | 187.4K | 2.4M | +2.2M |
| Qube Research & Technologies Ltd | Increased | 4.9M | 7.1M | +2.1M |
| MARSHALL WACE, LLP | New | 0 | 2.1M | +2.1M |
| Corient Private Wealth LP | Increased | 4.0M | 5.6M | +1.6M |
| VANGUARD PORTFOLIO MANAGEMENT LLC | Reduced | 2.2M | 544.2K | -1.6M |
| Rock Springs Capital Management LP | Sold Out | 1.6M | 0 | -1.6M |
| MACKENZIE FINANCIAL CORP | Sold Out | 1.5M | 0 | -1.5M |
| HSBC HOLDINGS PLC | Increased | 113.9K | 1.6M | +1.5M |
| UBS Group AG | Increased | 1.9M | 3.1M | +1.2M |
| JPMORGAN CHASE & CO | Increased | 92.7K | 1.2M | +1.1M |
| NORTHERN TRUST CORP | Reduced | 1.4M | 458.5K | -950.5K |
| VOYA INVESTMENT MANAGEMENT LLC | Sold Out | 866.6K | 0 | -866.6K |
| Squarepoint Ops LLC | Reduced | 3.4M | 2.6M | -842.4K |
| MB Generational Wealth, LLC | Increased | 1.5M | 2.2M | +685.3K |
| XTX Topco Ltd | Sold Out | 679.1K | 0 | -679.1K |
| Connor, Clark & Lunn Investment Management Ltd. | Sold Out | 658.2K | 0 | -658.2K |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC | Reduced | 1.5M | 992.5K | -517.5K |
| JACOBS LEVY EQUITY MANAGEMENT, INC | Increased | 1.7M | 2.2M | +492.2K |
| SMITH, MOORE & CO. | Increased | 470.0K | 900.0K | +430.0K |
| Bank of New York Mellon Corp | Reduced | 428.2K | 45.7K | -382.5K |
| TUDOR INVESTMENT CORP ET AL | Increased | 115.2K | 479.6K | +364.3K |
| CHOREO, LLC | Increased | 250.1K | 540.1K | +290.0K |
| Hennion & Walsh Asset Management, Inc. | Increased | 828.7K | 1.1M | +270.2K |
| PANAGORA ASSET MANAGEMENT INC | Increased | 469.9K | 733.2K | +263.3K |
| Ensign Peak Advisors, Inc | Reduced | 1.7M | 1.5M | -251.1K |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | Increased | 135.8K | 383.0K | +247.3K |
| Virtu Financial LLC | Increased | 263.2K | 463.7K | +200.5K |
| DEUTSCHE BANK AG\ | Reduced | 1.3M | 1.1M | -199.4K |
| IEQ CAPITAL, LLC | Increased | 393.7K | 591.3K | +197.5K |
| WADDELL & ASSOCIATES, LLC | Increased | 67.6K | 261.8K | +194.2K |
| ALLIANCEBERNSTEIN L.P. | Sold Out | 190.2K | 0 | -190.2K |
| Mariner, LLC | Increased | 418.4K | 594.7K | +176.3K |
| PRUDENTIAL FINANCIAL INC | Increased | 55.9K | 227.6K | +171.6K |
| EVENTIDE ASSET MANAGEMENT, LLC | New | 0 | 163.4K | +163.4K |
| VANGUARD FIDUCIARY TRUST CO | Reduced | 1.4M | 1.2M | -158.9K |
| Schonfeld Strategic Advisors LLC | New | 0 | 132.9K | +132.9K |
| PRICE T ROWE ASSOCIATES INC /MD/ | Sold Out | 132.0K | 0 | -132.0K |
| LOS ANGELES CAPITAL MANAGEMENT LLC | Sold Out | 131.2K | 0 | -131.2K |
| RHUMBLINE ADVISERS | Reduced | 216.4K | 88.6K | -127.8K |
| MORGAN STANLEY | Reduced | 367.4K | 241.6K | -125.8K |
| OSAIC HOLDINGS, INC. | Increased | 1.3K | 120.2K | +118.9K |
13F filings are due 45 days after quarter end and cover long positions in U.S.-listed equities only, so this is a lagged and partial picture: shorts, bonds and foreign listings never appear. Options positions are excluded here rather than folded into the share counts. Political ownership is coming.