SAN DIEGO, CA
GOSSAMER BIO, INC.GOSS— Latest position per institution from SEC 13F filings
15
Institutional holders
157.53M
Total shares held
112.91M
Estimated value
7.88M
Avg. position size
BLACKROCK, INC.
CIK 2012383
Shares
16.83M
Value
5.53M
Filed
Mar 31, 2026
ARTAL GROUP S.A.
CIK 1053906
Shares
13.52M
Value
12.18M
Filed
Jun 30, 2024
VANGUARD GROUP INC
CIK 102909
Shares
12.87M
Value
39.91M
Filed
Dec 31, 2025
AQR CAPITAL MANAGEMENT LLC
CIK 1167557
Shares
10.13M
Value
3.33M
Filed
Mar 31, 2026
VANGUARD CAPITAL MANAGEMENT LLC
CIK 2100119
Shares
9.39M
Value
3.09M
Filed
Mar 31, 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
2.65M
Filed
Mar 31, 2026
OCTAGON CAPITAL ADVISORS LP
CIK 1839435
Shares
7.75M
Value
2.55M
Filed
Mar 31, 2026
KALEHUA CAPITAL MANAGEMENT LLC
CIK 2106181
Shares
7.47M
Value
2.45M
Filed
Mar 31, 2026
SAMSARA BIOCAPITAL, LLC
CIK 1744967
Shares
7.22M
Value
2.37M
Filed
Mar 31, 2026
BOXER CAPITAL, LLC
CIK 1465837
Shares
6.50M
Value
5.41M
Filed
Sep 30, 2023
GREAT POINT PARTNERS LLC
CIK 1281446
Shares
6.23M
Value
5.19M
Filed
Sep 30, 2023
FARALLON CAPITAL MANAGEMENT LLC
CIK 909661
Shares
6.13M
Value
7.23M
Filed
Mar 31, 2024
BALYASNY ASSET MANAGEMENT L.P.
CIK 1218710
Shares
5.92M
Value
1.95M
Filed
Mar 31, 2026
ACADIAN ASSET MANAGEMENT LLC
CIK 916542
Shares
5.28M
Value
1.73K
Filed
Mar 31, 2026
SIREN, L.L.C.
CIK 2005245
Shares
5.21M
Value
1.71M
Filed
Mar 31, 2026
683 CAPITAL MANAGEMENT, LLC
CIK 1404574
Shares
5M
Value
1.64M
Filed
Mar 31, 2026
HHLR ADVISORS, LTD.
CIK 1762304
Shares
4.97M
Value
1.63M
Filed
Mar 31, 2026
GEODE CAPITAL MANAGEMENT, LLC
CIK 1214717
Shares
4.94M
Value
1.62M
Filed
Mar 31, 2026
QUBE RESEARCH & TECHNOLOGIES LTD
CIK 1729829
Shares
4.92M
Value
1.62M
Filed
Mar 31, 2026
| # | Institution | CIK | Shares | Est. Value | Period |
|---|---|---|---|---|---|
| 1 | BLACKROCK, INC. | 2012383 | 16.83M | 5.53M | Mar 31, 2026 |
| 2 | ARTAL GROUP S.A. | 1053906 | 13.52M | 12.18M | Jun 30, 2024 |
| 3 | VANGUARD GROUP INC | 102909 | 12.87M | 39.91M | Dec 31, 2025 |
| 4 | AQR CAPITAL MANAGEMENT LLC | 1167557 | 10.13M | 3.33M | Mar 31, 2026 |
| 5 | VANGUARD CAPITAL MANAGEMENT LLC | 2100119 | 9.39M | 3.09M | Mar 31, 2026 |
| 6 | ECOR1 CAPITAL, LLC | 1587114 | 9.20M | 10.85M | Mar 31, 2024 |
| 7 | ARCH VENTURE MANAGEMENT, LLC | 1274403 | 8.06M | 2.65M | Mar 31, 2026 |
| 8 | OCTAGON CAPITAL ADVISORS LP | 1839435 | 7.75M | 2.55M | Mar 31, 2026 |
| 9 | KALEHUA CAPITAL MANAGEMENT LLC | 2106181 | 7.47M | 2.45M | Mar 31, 2026 |
| 10 | SAMSARA BIOCAPITAL, LLC | 1744967 | 7.22M | 2.37M | Mar 31, 2026 |
| 11 | BOXER CAPITAL, LLC | 1465837 | 6.50M | 5.41M | Sep 30, 2023 |
| 12 | GREAT POINT PARTNERS LLC | 1281446 | 6.23M | 5.19M | Sep 30, 2023 |
| 13 | FARALLON CAPITAL MANAGEMENT LLC | 909661 | 6.13M | 7.23M | Mar 31, 2024 |
| 14 | BALYASNY ASSET MANAGEMENT L.P. | 1218710 | 5.92M | 1.95M | Mar 31, 2026 |
| 15 | ACADIAN ASSET MANAGEMENT LLC | 916542 | 5.28M | 1.73K | Mar 31, 2026 |
| 16 | SIREN, L.L.C. | 2005245 | 5.21M | 1.71M | Mar 31, 2026 |
| 17 | 683 CAPITAL MANAGEMENT, LLC | 1404574 | 5M | 1.64M | Mar 31, 2026 |
| 18 | HHLR ADVISORS, LTD. | 1762304 | 4.97M | 1.63M | Mar 31, 2026 |
| 19 | GEODE CAPITAL MANAGEMENT, LLC | 1214717 | 4.94M | 1.62M | Mar 31, 2026 |
| 20 | QUBE RESEARCH & TECHNOLOGIES LTD | 1729829 | 4.92M | 1.62M | Mar 31, 2026 |
Data sourced from SEC Form 13F institutional holdings reports. Positions reflect the most recent filing per institution.