Gossamer Bio GOSS Institutional Ownership

NASDAQ GOSS

$9.79 +0.21 (+2.19%)

At close: Oct 21, 2026 · 4:00 PM EDT

Institutions by Trading Activity

163 Institutions

Increased 86 52.8%

Unchanged 33 20.2%

Reduced 44 27.0%

Ownership Statistics

13F · as of 30 Jun, 2026

Institutional Ownership

75.77%

▲+4.61 pp QoQ

Shares Held by Institutions

4.63Mn

of 6.11Mn outstanding

▲+121.79% QoQ

Shares Outstanding

6.11Mn

1.48Mn held outside 13F filers

Institutional Investors

163

filed 13F for Jun 2026

▼-17 vs prior quarter

Net Shares Added (QoQ)

+2.54Mn

accumulated since last quarter

Value of Holdings

$44.36Mn

reported market value

Shares Owned by Institutions

Shares held % of outstanding

Latest —

Average ownership —

Peak ownership —

Shares Purchased/Sold by Institutions

Accumulated Distributed

Latest quarter —

Net over range —

Accumulating quarters —

Ownership Summary

Updated Oct 10, 2026

Gossamer Bio, Inc. (NASDAQ:GOSS) was held by 163 institutional investors that filed 13F reports for the quarter ended June 30, 2026.

These investors held 75.77% of outstanding shares in Q2 2026, up from 71.16% the quarter before.
Total shares held in Gossamer Bio rose 121.79% versus Q1 2026, while the number of holders rose 36.97% versus Q2 2025.
Among the 163 holders of Gossamer Bio, 86 added to their positions, 44 reduced their stakes and 33 left their positions unchanged.
In total, institutional investors held 4.63Mn shares of Gossamer Bio at the end of Q2 2026, up 2.54Mn from the prior quarter and up 2.44Mn from a year earlier.
As of June 30, 2026, the biggest holder of Gossamer Bio was D. E. Shaw & Co., Inc. with 511.99K shares, or 8.38% of shares outstanding.
The biggest increases in GOSS positions during Q2 2026 came from D. E. Shaw & Co., Inc. (+507.12K shares), 683 Capital Management, LLC (+427.49K shares), GSA Capital Partners LLP (+146.66K shares), Renaissance Technologies LLC (+130.15K shares) and AQR Capital Management LLC (+68.79K shares).
Among holders that kept a stake in Gossamer Bio, the biggest sellers in Q2 2026 were BlackRock, Inc. (-114.46K shares), Balyasny Asset Management L.P. (-72.73K shares), Acadian Asset Management LLC (-43.57K shares), State Street Corp (-40.92K shares) and Bank of America Corp (-34.71K shares).
Per Business Quant, the top 10 investors in GOSS for the quarter ended June 30, 2026 were D. E. Shaw & Co., Inc. (511.99K shares), 683 Capital Management, LLC (489.99K shares), DeepCurrents Investment Group LLC (470.81K shares), Context Capital Management, LLC (361.83K shares), Worth Venture Partners, LLC (312.72K shares), AQR Capital Management LLC (195.37K shares), GSA Capital Partners LLP (187.34K shares), Wolverine Asset Management LLC (161.18K shares), Renaissance Technologies LLC (145.37K shares) and Kalehua Capital Management LLC (139.37K shares).

Form 13F Holdings

167 Institutional Holders

Report period 30 Jun, 2026

Total shares held 4.63Mn

Of outstanding 75.77%

#	Institution	CIK	Shares Held	% of Outstanding	Change (QoQ)	Change (%)	Value (USD)
1	D. E. Shaw & Co., Inc.	0001009207	511,991	8.38%	▲507,123	+10,417.73%	$6.74Mn
2	683 Capital Management, LLC	0001404574	489,986	8.02%	▲427,486	+683.98%	$6.45Mn
3	DeepCurrents Investment Group LLC	0001754535	470,813	7.70%	▲470,813	0.00%	$6.03Mn
4	Context Capital Management, LLC	0001301396	361,831	5.92%	▲361,831	0.00%	$4.76Mn
5	Worth Venture Partners, LLC	0001696778	312,724	5.12%	▲312,724	0.00%	$4.12Mn
6	AQR CAPITAL MANAGEMENT LLC	0001167557	195,375	3.20%	▲68,789	+54.34%	$2.57Mn
7	GSA CAPITAL PARTNERS LLP	0001362033	187,337	3.07%	▲146,659	+360.54%	$2.47K
8	WOLVERINE ASSET MANAGEMENT LLC	0001279891	161,184	2.64%	▲161,184	0.00%	$2.12Mn
9	RENAISSANCE TECHNOLOGIES LLC	0001037389	145,374	2.38%	▲130,150	+854.94%	$1.91Mn
10	Kalehua Capital Management LLC	0002106181	139,367	2.28%	▲45,969	+49.22%	$1.84Mn
11	VANGUARD CAPITAL MANAGEMENT LLC	0002100119	117,700	1.93%	▲268	+0.23%	$1.55Mn
12	ARCH Venture Management, LLC	0001274403	100,699	1.65%	0	0.00%	$1.33Mn
13	Barclays Plc	0000312069	97,907	1.60%	▲59,584	+155.48%	$1.29Mn
14	Octagon Capital Advisors LP	0001839435	96,875	1.59%	0	0.00%	$1.28Mn
15	BlackRock, Inc.	0002012383	95,874	1.57%	▼114,459	-54.42%	$1.26Mn
16	ARROWSTREET CAPITAL, LIMITED PARTNERSHIP	0001164508	94,667	1.55%	▲94,667	0.00%	$1.25Mn
17	TWO SIGMA INVESTMENTS, LP	0001179392	92,900	1.52%	▲33,139	+55.45%	$1.22Mn
18	Samsara BioCapital, LLC	0001744967	90,282	1.48%	0	0.00%	$1.19Mn
19	Qube Research & Technologies Ltd	0001729829	88,322	1.45%	▲26,850	+43.68%	$1.16Mn
20	Corient Private Wealth LP	0001948780	70,319	1.15%	▲20,502	+41.15%	$925.96K

Showing 1 to 20 of 167 holders