BOSTON, MA
PEPGEN INC.PEPG— Latest position per institution from SEC 13F filings
15
Institutional holders
56.01M
Total shares held
151.71M
Estimated value
2.80M
Avg. position size
RA CAPITAL MANAGEMENT, L.P.
CIK 1346824
Shares
20.06M
Value
35.51M
Filed
Mar 31, 2026
COMMODORE CAPITAL LP
CIK 1831942
Shares
4.47M
Value
7.92M
Filed
Mar 31, 2026
VIKING GLOBAL INVESTORS LP
CIK 1103804
Shares
3.48M
Value
6.16M
Filed
Mar 31, 2026
LAURION CAPITAL MANAGEMENT LP
CIK 1390202
Shares
2.75M
Value
4.87M
Filed
Mar 31, 2026
VIVO CAPITAL, LLC
CIK 1674712
Shares
2.33M
Value
4.12M
Filed
Mar 31, 2026
VANGUARD GROUP INC
CIK 102909
Shares
2.21M
Value
14.41M
Filed
Dec 31, 2025
MILLENNIUM MANAGEMENT LLC
CIK 1273087
Shares
2.08M
Value
3.68M
Filed
Mar 31, 2026
VANGUARD CAPITAL MANAGEMENT LLC
CIK 2100119
Shares
1.94M
Value
3.43M
Filed
Mar 31, 2026
BVF INC/IL
CIK 1056807
Shares
1.92M
Value
12.47M
Filed
Dec 31, 2025
AWM INVESTMENT COMPANY, INC.
CIK 1535264
Shares
1.83M
Value
3.24M
Filed
Mar 31, 2026
ADAR1 CAPITAL MANAGEMENT, LLC
CIK 1940272
Shares
1.61M
Value
2.85M
Filed
Mar 31, 2026
RTW INVESTMENTS, LP
CIK 1493215
Shares
1.50M
Value
6.93M
Filed
Sep 30, 2025
JANUS HENDERSON GROUP PLC
CIK 1274173
Shares
1.50M
Value
9.79M
Filed
Dec 31, 2025
WOODLINE PARTNERS LP
CIK 1784547
Shares
1.31M
Value
2.32M
Filed
Mar 31, 2026
PICTET ASSET MANAGEMENT HOLDING SA
CIK 1993888
Shares
1.31M
Value
2.31M
Filed
Mar 31, 2026
BLACKROCK, INC.
CIK 2012383
Shares
1.28M
Value
2.26M
Filed
Mar 31, 2026
TCG CROSSOVER MANAGEMENT, LLC
CIK 1839948
Shares
1.20M
Value
5.54M
Filed
Sep 30, 2025
DEEP TRACK CAPITAL, LP
CIK 1856083
Shares
1.20M
Value
5.54M
Filed
Sep 30, 2025
BLACKROCK FINANCE, INC.
CIK 1364742
Shares
1.04M
Value
16.58M
Filed
Jun 30, 2024
MORGAN STANLEY
CIK 895421
Shares
998.99K
Value
1.77M
Filed
Mar 31, 2026
| # | Institution | CIK | Shares | Est. Value | Period |
|---|---|---|---|---|---|
| 1 | RA CAPITAL MANAGEMENT, L.P. | 1346824 | 20.06M | 35.51M | Mar 31, 2026 |
| 2 | COMMODORE CAPITAL LP | 1831942 | 4.47M | 7.92M | Mar 31, 2026 |
| 3 | VIKING GLOBAL INVESTORS LP | 1103804 | 3.48M | 6.16M | Mar 31, 2026 |
| 4 | LAURION CAPITAL MANAGEMENT LP | 1390202 | 2.75M | 4.87M | Mar 31, 2026 |
| 5 | VIVO CAPITAL, LLC | 1674712 | 2.33M | 4.12M | Mar 31, 2026 |
| 6 | VANGUARD GROUP INC | 102909 | 2.21M | 14.41M | Dec 31, 2025 |
| 7 | MILLENNIUM MANAGEMENT LLC | 1273087 | 2.08M | 3.68M | Mar 31, 2026 |
| 8 | VANGUARD CAPITAL MANAGEMENT LLC | 2100119 | 1.94M | 3.43M | Mar 31, 2026 |
| 9 | BVF INC/IL | 1056807 | 1.92M | 12.47M | Dec 31, 2025 |
| 10 | AWM INVESTMENT COMPANY, INC. | 1535264 | 1.83M | 3.24M | Mar 31, 2026 |
| 11 | ADAR1 CAPITAL MANAGEMENT, LLC | 1940272 | 1.61M | 2.85M | Mar 31, 2026 |
| 12 | RTW INVESTMENTS, LP | 1493215 | 1.50M | 6.93M | Sep 30, 2025 |
| 13 | JANUS HENDERSON GROUP PLC | 1274173 | 1.50M | 9.79M | Dec 31, 2025 |
| 14 | WOODLINE PARTNERS LP | 1784547 | 1.31M | 2.32M | Mar 31, 2026 |
| 15 | PICTET ASSET MANAGEMENT HOLDING SA | 1993888 | 1.31M | 2.31M | Mar 31, 2026 |
| 16 | BLACKROCK, INC. | 2012383 | 1.28M | 2.26M | Mar 31, 2026 |
| 17 | TCG CROSSOVER MANAGEMENT, LLC | 1839948 | 1.20M | 5.54M | Sep 30, 2025 |
| 18 | DEEP TRACK CAPITAL, LP | 1856083 | 1.20M | 5.54M | Sep 30, 2025 |
| 19 | BLACKROCK FINANCE, INC. | 1364742 | 1.04M | 16.58M | Jun 30, 2024 |
| 20 | MORGAN STANLEY | 895421 | 998.99K | 1.77M | Mar 31, 2026 |
Data sourced from SEC Form 13F institutional holdings reports. Positions reflect the most recent filing per institution.