ZAI LAB LTDZLAB— Latest position per institution from SEC 13F filings
15
Institutional holders
42M
Total shares held
986.89M
Estimated value
2.10M
Avg. position size
RTW INVESTMENTS, LP
CIK 1493215
Shares
6.57M
Value
123.66M
Filed
Mar 31, 2026
CAPITAL WORLD INVESTORS
CIK 1422849
Shares
6.08M
Value
205.97M
Filed
Sep 30, 2025
RA CAPITAL MANAGEMENT, L.P.
CIK 1346824
Shares
5.71M
Value
107.35M
Filed
Mar 31, 2026
ECOR1 CAPITAL, LLC
CIK 1587114
Shares
2.16M
Value
66.24M
Filed
Dec 31, 2022
JANUS HENDERSON GROUP PLC
CIK 1274173
Shares
2.05M
Value
69.49M
Filed
Sep 30, 2025
VIKING GLOBAL INVESTORS LP
CIK 1103804
Shares
1.95M
Value
47.07M
Filed
Sep 30, 2024
FRAZIER LIFE SCIENCES MANAGEMENT, L.P.
CIK 1892134
Shares
1.90M
Value
35.78M
Filed
Mar 31, 2026
CLEARBRIDGE INVESTMENTS, LLC
CIK 1348883
Shares
1.81M
Value
31.89M
Filed
Dec 31, 2025
CITADEL ADVISORS LLC
CIK 1423053
Shares
1.72M
Value
32.39M
Filed
Mar 31, 2026
BAMCO INC /NY/
CIK 1017918
Shares
1.66M
Value
31.19M
Filed
Mar 31, 2026
SEGANTII CAPITAL MANAGEMENT LTD
CIK 1544676
Shares
1.56M
Value
24.93M
Filed
Mar 31, 2024
ADAR1 CAPITAL MANAGEMENT, LLC
CIK 1940272
Shares
1.43M
Value
26.81M
Filed
Mar 31, 2026
FMR LLC
CIK 315066
Shares
1.26M
Value
23.75M
Filed
Mar 31, 2026
PARADIGM BIOCAPITAL ADVISORS LP
CIK 1855655
Shares
1.09M
Value
29.84M
Filed
Dec 31, 2023
NORGES BANK
CIK 1374170
Shares
1.07M
Value
32.78M
Filed
Dec 31, 2022
BLACKROCK, INC.
CIK 2012383
Shares
865.15K
Value
16.27M
Filed
Mar 31, 2026
ALLIANZ ASSET MANAGEMENT GMBH
CIK 1535323
Shares
815K
Value
27.62M
Filed
Sep 30, 2025
ROCK SPRINGS CAPITAL MANAGEMENT LP
CIK 1595725
Shares
814.71K
Value
15.32M
Filed
Mar 31, 2026
WELLINGTON MANAGEMENT GROUP LLP
CIK 902219
Shares
752.86K
Value
13.28M
Filed
Dec 31, 2025
MPM BIOIMPACT LLC
CIK 1687078
Shares
745.06K
Value
25.25M
Filed
Sep 30, 2025
| # | Institution | CIK | Shares | Est. Value | Period |
|---|---|---|---|---|---|
| 1 | RTW INVESTMENTS, LP | 1493215 | 6.57M | 123.66M | Mar 31, 2026 |
| 2 | CAPITAL WORLD INVESTORS | 1422849 | 6.08M | 205.97M | Sep 30, 2025 |
| 3 | RA CAPITAL MANAGEMENT, L.P. | 1346824 | 5.71M | 107.35M | Mar 31, 2026 |
| 4 | ECOR1 CAPITAL, LLC | 1587114 | 2.16M | 66.24M | Dec 31, 2022 |
| 5 | JANUS HENDERSON GROUP PLC | 1274173 | 2.05M | 69.49M | Sep 30, 2025 |
| 6 | VIKING GLOBAL INVESTORS LP | 1103804 | 1.95M | 47.07M | Sep 30, 2024 |
| 7 | FRAZIER LIFE SCIENCES MANAGEMENT, L.P. | 1892134 | 1.90M | 35.78M | Mar 31, 2026 |
| 8 | CLEARBRIDGE INVESTMENTS, LLC | 1348883 | 1.81M | 31.89M | Dec 31, 2025 |
| 9 | CITADEL ADVISORS LLC | 1423053 | 1.72M | 32.39M | Mar 31, 2026 |
| 10 | BAMCO INC /NY/ | 1017918 | 1.66M | 31.19M | Mar 31, 2026 |
| 11 | SEGANTII CAPITAL MANAGEMENT LTD | 1544676 | 1.56M | 24.93M | Mar 31, 2024 |
| 12 | ADAR1 CAPITAL MANAGEMENT, LLC | 1940272 | 1.43M | 26.81M | Mar 31, 2026 |
| 13 | FMR LLC | 315066 | 1.26M | 23.75M | Mar 31, 2026 |
| 14 | PARADIGM BIOCAPITAL ADVISORS LP | 1855655 | 1.09M | 29.84M | Dec 31, 2023 |
| 15 | NORGES BANK | 1374170 | 1.07M | 32.78M | Dec 31, 2022 |
| 16 | BLACKROCK, INC. | 2012383 | 865.15K | 16.27M | Mar 31, 2026 |
| 17 | ALLIANZ ASSET MANAGEMENT GMBH | 1535323 | 815K | 27.62M | Sep 30, 2025 |
| 18 | ROCK SPRINGS CAPITAL MANAGEMENT LP | 1595725 | 814.71K | 15.32M | Mar 31, 2026 |
| 19 | WELLINGTON MANAGEMENT GROUP LLP | 902219 | 752.86K | 13.28M | Dec 31, 2025 |
| 20 | MPM BIOIMPACT LLC | 1687078 | 745.06K | 25.25M | Sep 30, 2025 |
Data sourced from SEC Form 13F institutional holdings reports. Positions reflect the most recent filing per institution.