BOSTON, MA
PEPGEN INC.PEPG— Latest position per institution from SEC 13F filings
15
Institutional holders
56.29M
Total shares held
153.48M
Estimated value
2.81M
Avg. position size
RA CAPITAL MANAGEMENT, L.P.
CIK 1346824
Shares
20.06M
Value
36.12M
Filed
Jun 30, 2026
COMMODORE CAPITAL LP
CIK 1831942
Shares
4.47M
Value
8.05M
Filed
Jun 30, 2026
VIKING GLOBAL INVESTORS LP
CIK 1103804
Shares
3.48M
Value
6.27M
Filed
Jun 30, 2026
LAURION CAPITAL MANAGEMENT LP
CIK 1390202
Shares
2.75M
Value
4.95M
Filed
Jun 30, 2026
ADAR1 CAPITAL MANAGEMENT, LLC
CIK 1940272
Shares
2.59M
Value
4.66M
Filed
Jun 30, 2026
VIVO CAPITAL, LLC
CIK 1674712
Shares
2.33M
Value
4.18M
Filed
Jun 30, 2026
VANGUARD GROUP INC
CIK 102909
Shares
2.21M
Value
14.41M
Filed
Dec 31, 2025
VANGUARD CAPITAL MANAGEMENT LLC
CIK 2100119
Shares
1.94M
Value
3.48M
Filed
Jun 30, 2026
BVF INC/IL
CIK 1056807
Shares
1.92M
Value
12.47M
Filed
Dec 31, 2025
MILLENNIUM MANAGEMENT LLC
CIK 1273087
Shares
1.79M
Value
3.22M
Filed
Jun 30, 2026
RENAISSANCE TECHNOLOGIES LLC
CIK 1037389
Shares
1.52M
Value
2.74M
Filed
Jun 30, 2026
RTW INVESTMENTS, LP
CIK 1493215
Shares
1.50M
Value
6.93M
Filed
Sep 30, 2025
JANUS HENDERSON GROUP LTD.
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
1.30M
Value
2.35M
Filed
Jun 30, 2026
DEEP TRACK CAPITAL, LP
CIK 1856083
Shares
1.20M
Value
5.54M
Filed
Sep 30, 2025
TCG CROSSOVER MANAGEMENT, LLC
CIK 1839948
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
MARSHALL WACE, LLP
CIK 1318757
Shares
866.99K
Value
1.56M
Filed
Jun 30, 2026
| # | Institution | CIK | Shares | Est. Value | Period |
|---|---|---|---|---|---|
| 1 | RA CAPITAL MANAGEMENT, L.P. | 1346824 | 20.06M | 36.12M | Jun 30, 2026 |
| 2 | COMMODORE CAPITAL LP | 1831942 | 4.47M | 8.05M | Jun 30, 2026 |
| 3 | VIKING GLOBAL INVESTORS LP | 1103804 | 3.48M | 6.27M | Jun 30, 2026 |
| 4 | LAURION CAPITAL MANAGEMENT LP | 1390202 | 2.75M | 4.95M | Jun 30, 2026 |
| 5 | ADAR1 CAPITAL MANAGEMENT, LLC | 1940272 | 2.59M | 4.66M | Jun 30, 2026 |
| 6 | VIVO CAPITAL, LLC | 1674712 | 2.33M | 4.18M | Jun 30, 2026 |
| 7 | VANGUARD GROUP INC | 102909 | 2.21M | 14.41M | Dec 31, 2025 |
| 8 | VANGUARD CAPITAL MANAGEMENT LLC | 2100119 | 1.94M | 3.48M | Jun 30, 2026 |
| 9 | BVF INC/IL | 1056807 | 1.92M | 12.47M | Dec 31, 2025 |
| 10 | MILLENNIUM MANAGEMENT LLC | 1273087 | 1.79M | 3.22M | Jun 30, 2026 |
| 11 | RENAISSANCE TECHNOLOGIES LLC | 1037389 | 1.52M | 2.74M | Jun 30, 2026 |
| 12 | RTW INVESTMENTS, LP | 1493215 | 1.50M | 6.93M | Sep 30, 2025 |
| 13 | JANUS HENDERSON GROUP LTD. | 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 | 1.30M | 2.35M | Jun 30, 2026 |
| 17 | DEEP TRACK CAPITAL, LP | 1856083 | 1.20M | 5.54M | Sep 30, 2025 |
| 18 | TCG CROSSOVER MANAGEMENT, LLC | 1839948 | 1.20M | 5.54M | Sep 30, 2025 |
| 19 | BLACKROCK FINANCE, INC. | 1364742 | 1.04M | 16.58M | Jun 30, 2024 |
| 20 | MARSHALL WACE, LLP | 1318757 | 866.99K | 1.56M | Jun 30, 2026 |
Data sourced from SEC Form 13F institutional holdings reports. Positions reflect the most recent filing per institution.