SAN DIEGO, CA
GOSSAMER BIO, INC.GOSS— Latest position per institution from SEC 13F filings
15
Institutional holders
329.39M
Total shares held
108.66M
Estimated value
16.47M
Avg. position size
D. E. SHAW & CO., INC.
CIK 1009207
Shares
40.96M
Value
6.74M
Filed
Jun 30, 2026
683 CAPITAL MANAGEMENT, LLC
CIK 1404574
Shares
39.20M
Value
6.45M
Filed
Jun 30, 2026
DEEPCURRENTS INVESTMENT GROUP LLC
CIK 1754535
Shares
37.67M
Value
6.03M
Filed
Jun 30, 2026
CONTEXT CAPITAL MANAGEMENT, LLC
CIK 1301396
Shares
28.95M
Value
4.76M
Filed
Jun 30, 2026
WORTH VENTURE PARTNERS, LLC
CIK 1696778
Shares
25.02M
Value
4.12M
Filed
Jun 30, 2026
AQR CAPITAL MANAGEMENT LLC
CIK 1167557
Shares
15.63M
Value
2.57M
Filed
Jun 30, 2026
GSA CAPITAL PARTNERS LLP
CIK 1362033
Shares
14.99M
Value
2.47K
Filed
Jun 30, 2026
ARTAL GROUP S.A.
CIK 1053906
Shares
13.52M
Value
12.18M
Filed
Jun 30, 2024
WOLVERINE ASSET MANAGEMENT LLC
CIK 1279891
Shares
12.89M
Value
2.12M
Filed
Jun 30, 2026
VANGUARD GROUP INC
CIK 102909
Shares
12.87M
Value
39.91M
Filed
Dec 31, 2025
RENAISSANCE TECHNOLOGIES LLC
CIK 1037389
Shares
11.63M
Value
1.91M
Filed
Jun 30, 2026
KALEHUA CAPITAL MANAGEMENT LLC
CIK 2106181
Shares
11.15M
Value
1.84M
Filed
Jun 30, 2026
VANGUARD CAPITAL MANAGEMENT LLC
CIK 2100119
Shares
9.42M
Value
1.55M
Filed
Jun 30, 2026
ECOR1 CAPITAL, LLC
CIK 1587114
Shares
9.20M
Value
10.85M
Filed
Mar 31, 2024
ARCH VENTURE MANAGEMENT, LLC
CIK 1274403
Shares
8.06M
Value
1.33M
Filed
Jun 30, 2026
BARCLAYS PLC
CIK 312069
Shares
7.83M
Value
1.29M
Filed
Jun 30, 2026
OCTAGON CAPITAL ADVISORS LP
CIK 1839435
Shares
7.75M
Value
1.28M
Filed
Jun 30, 2026
BLACKROCK, INC.
CIK 2012383
Shares
7.67M
Value
1.26M
Filed
Jun 30, 2026
ARROWSTREET CAPITAL, LIMITED PARTNERSHIP
CIK 1164508
Shares
7.57M
Value
1.25M
Filed
Jun 30, 2026
TWO SIGMA INVESTMENTS, LP
CIK 1179392
Shares
7.43M
Value
1.22M
Filed
Jun 30, 2026
| # | Institution | CIK | Shares | Est. Value | Period |
|---|---|---|---|---|---|
| 1 | D. E. SHAW & CO., INC. | 1009207 | 40.96M | 6.74M | Jun 30, 2026 |
| 2 | 683 CAPITAL MANAGEMENT, LLC | 1404574 | 39.20M | 6.45M | Jun 30, 2026 |
| 3 | DEEPCURRENTS INVESTMENT GROUP LLC | 1754535 | 37.67M | 6.03M | Jun 30, 2026 |
| 4 | CONTEXT CAPITAL MANAGEMENT, LLC | 1301396 | 28.95M | 4.76M | Jun 30, 2026 |
| 5 | WORTH VENTURE PARTNERS, LLC | 1696778 | 25.02M | 4.12M | Jun 30, 2026 |
| 6 | AQR CAPITAL MANAGEMENT LLC | 1167557 | 15.63M | 2.57M | Jun 30, 2026 |
| 7 | GSA CAPITAL PARTNERS LLP | 1362033 | 14.99M | 2.47K | Jun 30, 2026 |
| 8 | ARTAL GROUP S.A. | 1053906 | 13.52M | 12.18M | Jun 30, 2024 |
| 9 | WOLVERINE ASSET MANAGEMENT LLC | 1279891 | 12.89M | 2.12M | Jun 30, 2026 |
| 10 | VANGUARD GROUP INC | 102909 | 12.87M | 39.91M | Dec 31, 2025 |
| 11 | RENAISSANCE TECHNOLOGIES LLC | 1037389 | 11.63M | 1.91M | Jun 30, 2026 |
| 12 | KALEHUA CAPITAL MANAGEMENT LLC | 2106181 | 11.15M | 1.84M | Jun 30, 2026 |
| 13 | VANGUARD CAPITAL MANAGEMENT LLC | 2100119 | 9.42M | 1.55M | Jun 30, 2026 |
| 14 | ECOR1 CAPITAL, LLC | 1587114 | 9.20M | 10.85M | Mar 31, 2024 |
| 15 | ARCH VENTURE MANAGEMENT, LLC | 1274403 | 8.06M | 1.33M | Jun 30, 2026 |
| 16 | BARCLAYS PLC | 312069 | 7.83M | 1.29M | Jun 30, 2026 |
| 17 | OCTAGON CAPITAL ADVISORS LP | 1839435 | 7.75M | 1.28M | Jun 30, 2026 |
| 18 | BLACKROCK, INC. | 2012383 | 7.67M | 1.26M | Jun 30, 2026 |
| 19 | ARROWSTREET CAPITAL, LIMITED PARTNERSHIP | 1164508 | 7.57M | 1.25M | Jun 30, 2026 |
| 20 | TWO SIGMA INVESTMENTS, LP | 1179392 | 7.43M | 1.22M | Jun 30, 2026 |
Data sourced from SEC Form 13F institutional holdings reports. Positions reflect the most recent filing per institution.