ARGENX SEARGX— Latest position per institution from SEC 13F filings
15
Institutional holders
23.31M
Total shares held
13.71B
Estimated value
1.17M
Avg. position size
FMR LLC
CIK 315066
Shares
4.99M
Value
3.64B
Filed
Mar 31, 2026
PRICE T ROWE ASSOCIATES INC /MD/
CIK 80255
Shares
3.37M
Value
2.46M
Filed
Mar 31, 2026
JANUS HENDERSON GROUP PLC
CIK 1274173
Shares
2.54M
Value
1.85B
Filed
Mar 31, 2026
CAPITAL WORLD INVESTORS
CIK 1422849
Shares
2.26M
Value
1.65B
Filed
Mar 31, 2026
ARTISAN PARTNERS LIMITED PARTNERSHIP
CIK 1466153
Shares
1.47M
Value
1.07B
Filed
Mar 31, 2026
WELLINGTON MANAGEMENT GROUP LLP
CIK 902219
Shares
1.02M
Value
745.92M
Filed
Mar 31, 2026
BLACKROCK FINANCE, INC.
CIK 1364742
Shares
1.01M
Value
434.90M
Filed
Jun 30, 2024
AVORO CAPITAL ADVISORS LLC
CIK 1633313
Shares
1M
Value
730.25M
Filed
Mar 31, 2026
BLACKROCK, INC.
CIK 2012383
Shares
808.34K
Value
590.29M
Filed
Mar 31, 2026
RTW INVESTMENTS, LP
CIK 1493215
Shares
709.45K
Value
518.07M
Filed
Mar 31, 2026
INVESCO LTD.
CIK 914208
Shares
594.70K
Value
434.28M
Filed
Mar 31, 2026
MORGAN STANLEY
CIK 895421
Shares
560.71K
Value
409.46M
Filed
Mar 31, 2026
MASSACHUSETTS FINANCIAL SERVICES CO /MA/
CIK 912938
Shares
425.55K
Value
167.55M
Filed
Mar 31, 2024
ALLIANCEBERNSTEIN L.P.
CIK 1109448
Shares
422.30K
Value
355.14M
Filed
Mar 31, 2026
BANK OF AMERICA CORP /DE/
CIK 70858
Shares
400.12K
Value
292.19M
Filed
Mar 31, 2026
DEEP TRACK CAPITAL, LP
CIK 1856083
Shares
365K
Value
197.86M
Filed
Sep 30, 2024
PICTET ASSET MANAGEMENT SA
CIK 1361570
Shares
354.35K
Value
138.10M
Filed
Jun 30, 2023
EATON VANCE MANAGEMENT
CIK 1076598
Shares
348.52K
Value
123.05K
Filed
Sep 30, 2022
SANDS CAPITAL MANAGEMENT, LLC
CIK 1020066
Shares
340.29K
Value
248.49M
Filed
Mar 31, 2026
BELLEVUE GROUP AG
CIK 1674546
Shares
313K
Value
228.57M
Filed
Mar 31, 2026
| # | Institution | CIK | Shares | Est. Value | Period |
|---|---|---|---|---|---|
| 1 | FMR LLC | 315066 | 4.99M | 3.64B | Mar 31, 2026 |
| 2 | PRICE T ROWE ASSOCIATES INC /MD/ | 80255 | 3.37M | 2.46M | Mar 31, 2026 |
| 3 | JANUS HENDERSON GROUP PLC | 1274173 | 2.54M | 1.85B | Mar 31, 2026 |
| 4 | CAPITAL WORLD INVESTORS | 1422849 | 2.26M | 1.65B | Mar 31, 2026 |
| 5 | ARTISAN PARTNERS LIMITED PARTNERSHIP | 1466153 | 1.47M | 1.07B | Mar 31, 2026 |
| 6 | WELLINGTON MANAGEMENT GROUP LLP | 902219 | 1.02M | 745.92M | Mar 31, 2026 |
| 7 | BLACKROCK FINANCE, INC. | 1364742 | 1.01M | 434.90M | Jun 30, 2024 |
| 8 | AVORO CAPITAL ADVISORS LLC | 1633313 | 1M | 730.25M | Mar 31, 2026 |
| 9 | BLACKROCK, INC. | 2012383 | 808.34K | 590.29M | Mar 31, 2026 |
| 10 | RTW INVESTMENTS, LP | 1493215 | 709.45K | 518.07M | Mar 31, 2026 |
| 11 | INVESCO LTD. | 914208 | 594.70K | 434.28M | Mar 31, 2026 |
| 12 | MORGAN STANLEY | 895421 | 560.71K | 409.46M | Mar 31, 2026 |
| 13 | MASSACHUSETTS FINANCIAL SERVICES CO /MA/ | 912938 | 425.55K | 167.55M | Mar 31, 2024 |
| 14 | ALLIANCEBERNSTEIN L.P. | 1109448 | 422.30K | 355.14M | Mar 31, 2026 |
| 15 | BANK OF AMERICA CORP /DE/ | 70858 | 400.12K | 292.19M | Mar 31, 2026 |
| 16 | DEEP TRACK CAPITAL, LP | 1856083 | 365K | 197.86M | Sep 30, 2024 |
| 17 | PICTET ASSET MANAGEMENT SA | 1361570 | 354.35K | 138.10M | Jun 30, 2023 |
| 18 | EATON VANCE MANAGEMENT | 1076598 | 348.52K | 123.05K | Sep 30, 2022 |
| 19 | SANDS CAPITAL MANAGEMENT, LLC | 1020066 | 340.29K | 248.49M | Mar 31, 2026 |
| 20 | BELLEVUE GROUP AG | 1674546 | 313K | 228.57M | Mar 31, 2026 |
Data sourced from SEC Form 13F institutional holdings reports. Positions reflect the most recent filing per institution.