GOSS · Gossamer Bio, Inc. · Holdings

$10.66 -0.12 (-1.11%)

Market Cap

$66.85M

6.11M

Volume · Oct 6 197.22K Avg daily vol (18 sessions) 340.01K

Institutional ownership from SEC Form 13F filings. Investment managers with more than $100 million in U.S. equities must disclose their positions every quarter, within 45 days of quarter-end, so the holdings shown can lag the market by up to a quarter.

Use institutional holdings through the 13F API or MCP →

Some SEC filings for this period have not finished importing. Holder totals and changes may be incomplete; these filings remain queued for recovery.

Quarter:

Holders: 173

Total Value: $61,412,445

Total Shares: 372,197,235

Showing 1–100 of 176 holdings by value · page 1 of 2

Institutional Ownership Trend

26 quarters

Holder Concentration

Across 173 13F filers · Δ vs Mar 31, 2026

Top Holder

11.0%

+1.3 pts

Top 5

46.2%

+14.6 pts

Top 10

64.0%

+14.3 pts

HHI

556

Broadly held+192

Quarterly Activity

vs Mar 31, 2026

New

Increased

Decreased

Sold Out

Unchanged

Holder count: -20

Institutional value: +7.8%

Shares held: +114.9%

Top Buyers

vs Mar 31, 2026

Institution	Added	Now Holds
Mega D. E. Shaw & Co., Inc.	+507,123	511,991
Mid 683 Capital Management, LLC	+427,486	489,986
Mid WOLVERINE ASSET MANAGEMENT LLC	+161,072	161,184
Mid GSA CAPITAL PARTNERS LLP	+146,659	187,337
Large RENAISSANCE TECHNOLOGIES LLC	+130,151	145,374

Top Sellers

vs Mar 31, 2026

Institution	Sold	Now Holds
Mega BlackRock, Inc.	−114,460	95,874
Large Balyasny Asset Management L.P.	−72,726	1,303
Large ACADIAN ASSET MANAGEMENT LLC	−43,572	22,402
Mega STATE STREET CORP	−40,917	13,934
Mega BANK OF AMERICA CORP /DE/	−34,713	4,959

Top New Positions

vs Mar 31, 2026

Institution	Acquired	Value (USD)
Micro DeepCurrents Investment Group LLC	470,813	$6,214,736
Small Context Capital Management, LLC	361,831	$4,776,165
Micro Worth Venture Partners, LLC	312,724	$4,127,950
Mega ARROWSTREET CAPITAL, LIMITED PARTNERSHIP	94,667	$1,249,609
Mega MARSHALL WACE, LLP	26,437	$348,973

Top Sold-Out Positions

vs Mar 31, 2026

Institution	Previously Held	Last Value (USD)
Mid Rock Springs Capital Management LP	20,119	$529,522
Large MACKENZIE FINANCIAL CORP	19,212	$505,647
Mega VOYA INVESTMENT MANAGEMENT LLC	10,833	$285,116
Mid XTX Topco Ltd	8,489	$223,432
Large Connor, Clark & Lunn Investment Management Ltd.	8,228	$216,554

Filter: New 27 Increased 63 Reduced 47 Sold out 47 Unchanged 36

Showing 100 of 176

All Common Calls Puts

Compact Export CSV

Holder

Value (USD)

% of 13F

D. E. Shaw & Co., Inc.

$6,758,281

11.00%

40,959,285

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
D. E. SHAW & CO, L.P.	40,569,854	$6,694,025	99.0%	Defined
D. E. Shaw Investment Management, L.L.C. joint	389,431	$64,256	1.0%	Defined

683 Capital Management, LLC

$6,467,813

10.53%

39,198,868

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
683 Capital Partners, LP	39,198,868	$6,467,813	100.0%	Defined

DeepCurrents Investment Group LLC

$6,214,736

10.12%

37,665,073

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Verition Fund Management LLC	10,018,934	$1,653,124	26.6%	Other
Held directly	27,646,139	$4,561,612	73.4%	Sole

Context Capital Management, LLC

$4,776,165

7.78%

28,946,459

Worth Venture Partners, LLC

$4,127,950

6.72%

25,017,881

AQR CAPITAL MANAGEMENT LLC

$2,578,945

4.20%

15,629,993

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Petros Family Wealth, LLC	3,414	$563	0.0%	Other
KEB ASSET MANAGEMENT, LLC	172	$28	0.0%	Other
RF&L WEALTH MANAGEMENT, LLC	5	$0	0.0%	Other
Arax Advisory Partners	80,249	$13,241	0.5%	Other
HALBERT HARGROVE GLOBAL ADVISORS, LLC	67,030	$11,059	0.4%	Other
Stokes Family Office, LLC	4,750	$783	0.0%	Other
Held directly	15,474,373	$2,553,271	99.0%	Defined

GSA CAPITAL PARTNERS LLP

$2,472,846

4.03%

14,986,947

WOLVERINE ASSET MANAGEMENT LLC

$2,127,633

3.46%

12,894,746

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Wolverine Holdings, LLC	12,894,746	$2,127,633	100.0%	Defined

RENAISSANCE TECHNOLOGIES LLC

$1,918,932

3.12%

11,629,896

Kalehua Capital Management LLC

$1,839,644

3.00%

11,149,363

VANGUARD CAPITAL MANAGEMENT LLC

$1,553,643

2.53%

9,416,023

ARCH Venture Management, LLC

$1,329,226

2.16%

8,055,916

BARCLAYS PLC

$1,292,365

2.10%

7,832,522

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
BARCLAYS BANK PLC	307,977	$50,816	3.9%	Defined
BARCLAYS CAPITAL INC.	7,524,545	$1,241,549	96.1%	Defined

Octagon Capital Advisors LP

$1,278,750

2.08%

7,750,000

BlackRock, Inc.

$1,265,537

2.06%

7,669,943

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
BLACKROCK FINANCIAL MANAGEMENT INC/DE	868,851	$143,360	11.3%	Sole
BlackRock Investment Management, LLC	24,871	$4,103	0.3%	Sole
BLACKROCK ADVISORS LLC	457,349	$75,462	6.0%	Sole
BlackRock Fund Advisors	1,861,903	$307,213	24.3%	Sole
BlackRock Institutional Trust Company, N.A.	4,269,516	$704,470	55.7%	Sole
BlackRock Investment Management (UK) Ltd.	22,595	$3,728	0.3%	Sole
BlackRock Asset Management Ireland Ltd	161,578	$26,660	2.1%	Sole
BlackRock (Luxembourg) S.A.	3,280	$541	0.0%	Sole

ARROWSTREET CAPITAL, LIMITED PARTNERSHIP

$1,249,609

2.03%

7,573,388

TWO SIGMA INVESTMENTS, LP

$1,226,280

2.00%

7,432,001

SAMSARA BIOCAPITAL, LLC

$1,191,722

1.94%

7,222,559

Qube Research & Technologies Ltd

$1,165,849

1.90%

7,065,756

Corient Private Wealth LLC

$929,395

1.51%

5,632,698

Siren, L.L.C.

$859,479

1.40%

5,208,968

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Invus Group, LLC	5,208,968	$859,479	100.0%	Defined

HHLR ADVISORS, LTD.

$820,716

1.34%

4,974,041

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
HILLHOUSE INVESTMENT MANAGEMENT, LTD.	4,974,041	$820,716	100.0%	Other

UBS Group AG

$510,473

0.83%

3,093,785

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
UBS AG	1,005,123	$165,845	32.5%	Defined
UBS Europe SE	5	$0	0.0%	Defined
UBS Securities LLC	2,088,657	$344,628	67.5%	Defined

Squarepoint Ops LLC

$421,802

0.69%

2,556,378

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Squarepoint Capital LLP	2,556,378	$421,802	100.0%	Defined

GEODE CAPITAL MANAGEMENT, LLC

$409,464

0.67%

2,481,605

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
GEODE CAPITAL MANAGEMENT TRUST COMPANY, LLC	446,526	$73,676	18.0%	Defined
Held directly	2,035,079	$335,788	82.0%	Defined

MILLENNIUM MANAGEMENT LLC

$396,434

0.65%

2,402,633

MB Generational Wealth, LLC

$365,879

0.60%

2,217,451

JACOBS LEVY EQUITY MANAGEMENT, INC

$360,921

0.59%

2,187,402

MARSHALL WACE, LLP

$348,973

0.57%

2,114,988

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Marshall Wace North America L.P. joint	2,114,988	$348,973	100.0%	Other

Alyeska Investment Group, L.P.

$338,487

0.55%

2,051,442

ACADIAN ASSET MANAGEMENT LLC

$295,702

0.48%

1,792,135

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Acadian Inc	1,792,135	$295,702	100.0%	Defined

HSBC HOLDINGS PLC

$261,214

0.43%

1,583,118

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
HSBC BANK PLC	1,583,118	$261,214	100.0%	Defined

Ensign Peak Advisors, Inc

$239,411

0.39%

1,450,979

VANGUARD FIDUCIARY TRUST CO

$205,489

0.33%

1,245,392

JPMORGAN CHASE & CO

$202,723

0.33%

1,228,634

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
J.P. Morgan Securities LLC	1,198,131	$197,691	97.5%	Defined
J.P. Morgan Securities plc	30,503	$5,032	2.5%	Defined

SUSQUEHANNA INTERNATIONAL GROUP, LLP

$193,347

0.31%

1,171,800

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
SUSQUEHANNA SECURITIES, LLC	1,171,800	$193,347	100.0%	Other

GOLDMAN SACHS GROUP INC

$186,193

0.30%

1,128,451

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
GOLDMAN SACHS & CO. LLC	717,387	$118,368	63.6%	Defined
GOLDMAN SACHS ASSET MANAGEMENT, L.P.	411,064	$67,825	36.4%	Defined

STATE STREET CORP

$183,928

0.30%

1,114,718

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
SSGA FUNDS MANAGEMENT, INC. joint	1,114,718	$183,928	100.0%	Defined

DEUTSCHE BANK AG\

$182,562

0.30%

1,106,441

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
DWS Investments UK Ltd	1,106,441	$182,562	100.0%	Defined

Hennion & Walsh Asset Management, Inc.

$181,320

0.30%

1,098,914

NEA Management Company, LLC

$165,000

0.27%

1,000,000

CHARLES SCHWAB INVESTMENT MANAGEMENT INC

$163,766

0.27%

992,527

SMITH, MOORE & CO.

$148,500

0.24%

900,000

Ishara Investments LP

$135,300

0.22%

820,000

PANAGORA ASSET MANAGEMENT INC

$120,980

0.20%

733,216

Mariner, LLC

$98,128

0.16%

594,719

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Mariner Platform Solutions, LLC	28,528	$4,707	4.8%	Other
Held directly	566,191	$93,421	95.2%	Sole

IEQ CAPITAL, LLC

$97,556

0.16%

591,254

VANGUARD PORTFOLIO MANAGEMENT LLC

$89,794

0.15%

544,212

CHOREO, LLC

$89,118

0.15%

540,111

TUDOR INVESTMENT CORP ET AL

$79,130

0.13%

479,581

Virtu Financial LLC

$76,511

0.12%

463,708

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Virtu Americas LLC	463,708	$76,511	100.0%	Defined

NORTHERN TRUST CORP

$75,652

0.12%

458,498

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
NORTHERN TRUST CO joint	458,498	$75,652	100.0%	Defined

Invesco Ltd.

$72,974

0.12%

442,268

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Invesco Capital Management LLC	442,268	$72,974	100.0%	Defined

BANK OF AMERICA CORP /DE/

$65,459

0.11%

396,727

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
BANK OF AMERICA NA	352,896	$58,227	89.0%	Defined
BOFA SECURITIES, INC.	43,831	$7,232	11.0%	Defined

SUSQUEHANNA INTERNATIONAL GROUP, LLP

$63,203

0.10%

383,049

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
SUSQUEHANNA SECURITIES, LLC	383,049	$63,203	100.0%	Other

LPL Financial LLC

$54,868

0.09%

332,534

MERCER GLOBAL ADVISORS INC /ADV

$49,147

0.08%

297,863

WADDELL & ASSOCIATES, LLC

$43,196

0.07%

261,798

MORGAN STANLEY

$39,859

0.06%

241,591

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
MORGAN STANLEY & CO INTERNATIONAL PLC	29,211	$4,819	12.1%	Defined
MORGAN STANLEY & CO. LLC	69,260	$11,427	28.7%	Defined
MORGAN STANLEY CAPITAL SERVICES, LLC	36,869	$6,083	15.3%	Defined
MORGAN STANLEY SMITH BARNEY LLC	104,836	$17,297	43.4%	Defined
PARAMETRIC PORTFOLIO ASSOCIATES LLC	1,415	$233	0.6%	Defined

PRUDENTIAL FINANCIAL INC

$37,545

0.06%

227,550

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
PGIM Quantitative Solutions LLC	227,550	$37,545	100.0%	Defined

ADAR1 Capital Management, LLC

$35,067

0.06%

212,531

Creative Planning

$34,972

0.06%

211,955

Merit Financial Group, LLC

$27,982

0.05%

169,596

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
AQR Capital Management	23,751	$3,918	14.0%	Other
Held directly	145,845	$24,064	86.0%	Sole

EVENTIDE ASSET MANAGEMENT, LLC

$26,967

0.04%

163,440

Cerity Partners LLC

$26,465

0.04%

160,399

CITADEL ADVISORS LLC

$25,839

0.04%

156,600

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Citadel Securities GP LLC	156,600	$25,839	100.0%	Defined

WEALTH ENHANCEMENT ADVISORY SERVICES, LLC

$25,393

0.04%

153,902

Sivia Capital Partners, LLC

$25,129

0.04%

152,298

SG Americas Securities, LLC

$24,211

0.04%

146,737

Tower Research Capital LLC (TRC)

$23,837

0.04%

144,473

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Tower Research Capital Investments LLC	66,366	$10,950	45.9%	Other
Latour Trading LLC (Latour)	78,107	$12,887	54.1%	Defined

HighTower Advisors, LLC

$23,819

0.04%

144,358

JANE STREET GROUP, LLC

$22,275

0.04%

135,000

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Jane Street Capital, LLC	135,000	$22,275	100.0%	Defined

Schonfeld Strategic Advisors LLC

$21,926

0.04%

132,888

FMR LLC

$21,503

0.04%

130,325

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Fidelity Management & Research Co LLC	130,325	$21,503	100.0%	Defined

Russell Investments Group, Ltd.

$19,969

0.03%

121,039

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Russell Investment Management, LLC joint	42,701	$7,045	35.3%	Other
Russell Investments Capital, LLC joint	22,823	$3,765	18.9%	Other
Russell Investments France SAS	13,689	$2,258	11.3%	Defined
Russell Investments Trust Company joint	41,826	$6,901	34.6%	Other

OSAIC HOLDINGS, INC.

$19,833

0.03%

120,204

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
OSAIC WEALTH, INC.	120,204	$19,833	100.0%	Defined

GROUP ONE TRADING LLC

$18,302

0.03%

110,927

Arax Advisory Partners

$17,853

0.03%

108,204

BCV Asset Management Inc.

$17,572

0.03%

106,500

Rockefeller Capital Management L.P.

$17,467

0.03%

105,866

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
ROCKEFELLER & CO. LLC	666	$109	0.6%	Defined
ROCKEFELLER FINANCIAL LLC	105,200	$17,358	99.4%	Defined

Balyasny Asset Management L.P.

$17,198

0.03%

104,232

COMMONWEALTH EQUITY SERVICES, LLC

$16,828

0.03%

101,993

Quarry LP

$16,500

0.03%

100,000

Focus Partners Wealth

$15,319

0.02%

92,848

RHUMBLINE ADVISERS

$14,618

0.02%

88,599

CAPTRUST FINANCIAL ADVISORS

$13,493

0.02%

81,778

Vanguard Global Advisers, LLC

$13,147

0.02%

79,682

CITADEL ADVISORS LLC

$12,210

0.02%

74,000

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Citadel Securities GP LLC	74,000	$12,210	100.0%	Defined

BNP PARIBAS ARBITRAGE, SA

$12,159

0.02%

73,693

Caprock Group, LLC

$11,550

0.02%

70,000

Velan Capital Investment Management LP

$11,550

0.02%

70,000

AlphaCore Capital LLC

$11,464

0.02%

69,482

Bronte Capital Management Pty Ltd.

$11,179

0.02%

67,754

TWO SIGMA SECURITIES, LLC

$9,580

0.02%

58,064

Integrated Wealth Concepts LLC

$9,160

0.01%

55,521

Bull Harbor Capital LLC

$8,453

0.01%

51,235

Beacon Pointe Advisors, LLC

$7,920

0.01%

48,000

Bank of New York Mellon Corp

$7,542

0.01%

45,713

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
The Bank of New York Mellon	45,712	$7,542	100.0%	Defined
Held directly	1	$0	0.0%	Defined

Y-Intercept (Hong Kong) Ltd

$7,129

0.01%

43,210

Cambridge Investment Research Advisors, Inc.

$7,062

0.01%

42,800

Key facts CIK 1728117 CUSIP 38341P102 13F (30d) 4 filings 4 filers Visit website