GOSSAMER BIO INC

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GOSS·38341P102·US·Common Stock·Healthcare - Biotechnology-Activist

GOSS (GOSSAMER BIO INC) is held by 86 institutional investors as of Q2 2026. Largest holders: D. E. Shaw & Co., Inc. ($6.7M), AQR CAPITAL MANAGEMENT LLC ($2.6M), WOLVERINE ASSET MANAGEMENT LLC ($2.1M). Net institutional sentiment: Mixed.

86

Holders

(8 Elite)

$28.7M

Total Value

47% (101)

Consensus

47 buying - 54 selling

13F: Jun 30, 2026Insider & Congress: Updated regularly

Smart Money Verdict

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Institutional (13F)80

Insider (Form 4)26

Activist (13D/13G)63

Congressional (STOCK Act)34

Holder Quality

33

★★★★★

Elite

77

★★★★

Strong

41

★★★

Solid

79

★★

Below

62

★

Weak

Held by 86 funds

8 elite

Who's Trading

Source dates: Price Oct 15, 2026 · Insiders Oct 2, 2025 · Activists Aug 24, 2026 · Congress none

ActivistDED. E. Shaw Valence Portfolios, L.L.C.5.7%Aug 24, 2026

ActivistOPOpaleye Management Inc.5.1%Jul 29, 2026

ActivistBlackRock, Inc.1.0%Jul 29, 2026

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Top Holders

Top Holders (86)History

AllNewIncreasedHeldDecreasedExitedFirst report

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Fund	Action	Shares	Value	Weight	Est. P&L	Conviction
DED. E. Shaw & Co., Inc.	Increased	41M(+104x)	$6.7M	0.0%	—	44
AQR CAPITAL MANAGEMENT LLC	Increased	15.6M(+54.3%)	$2.6M	0.0%	—	37
WAWOLVERINE ASSET MANAGEMENT LLC	New	12.9M	$2.1M	0.0%	—	36
RENAISSANCE TECHNOLOGIES LLC	Increased	11.6M(+854.9%)	$1.9M	0.0%	—	42
VAVANGUARD CAPITAL MANAGEMENT LLC	Increased	9.4M(+0.2%)	$1.6M	0.0%	—	17
BARCLAYS PLC	Increased	7.8M(+155.5%)	$1.3M	0.0%	—	41
BlackRock, Inc.	Decreased	7.7M(-54.4%)	$1.3M	0.0%	—	0
ARROWSTREET CAPITAL, LIMITED PARTNERSHIP	New	7.6M	$1.2M	0.0%	—	35
TWO SIGMA INVESTMENTS, LP	Increased	7.4M(+55.5%)	$1.2M	0.0%	—	36
Qube Research & Technologies Ltd	Increased	7.1M(+43.7%)	$1.2M	0.0%	—	34
Corient Private Wealth LP	Increased	5.6M(+41.3%)	$927,142	0.0%	—	33
HHLR ADVISORS, LTD.	Unchanged	5M	$818,727	0.1%	—	0
UBS Group AG	Increased	3.1M(+64.3%)	$510,474	0.0%	—	35
SOSquarepoint Ops LLC	Decreased	2.6M(-24.8%)	$420,780	0.0%	—	0
GEODE CAPITAL MANAGEMENT, LLC	Decreased	2.5M(-49.8%)	$408,706	0.0%	—	0
MILLENNIUM MANAGEMENT LLC	Increased	2.4M(+1182.0%)	$395,473	0.0%	—	38
JACOBS LEVY EQUITY MANAGEMENT, INC	Increased	2.2M(+29.0%)	$360,046	0.0%	—	30
MWMARSHALL WACE, LLP	New	2.1M	$338,399	0.0%	—	33
AIAlyeska Investment Group, L.P.	Unchanged	2.1M	$337,667	0.0%	—	0
HSBC HOLDINGS PLC	Increased	1.6M(+1289.4%)	$267,389	0.0%	—	38

Showing 1-20 of 109

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High Conviction Moves-Smart Money Convergence-Fund Consensus-Double-Down Detection

Data sourced from four public-disclosure sources: SEC 13F, Form 4, 13D/13G, and House/Senate STOCK Act disclosures. Not financial advice. Full disclaimer