GOSS Gossamer Bio, Inc.

NASDAQ
$10.73

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.

Managers compared
211
filed both this quarter and last
Managers holding
169
-15 on the quarter
Buyers
90
27 opened new
Sellers
86
42 sold out entirely
Buyer share
51.1%
of managers who traded it
Breadth
+2.3
net buyers, as a share of those trading

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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Ownership map

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.

Cut Unchanged Added Color saturates at ±50%.

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.