DUBLIN 4, L2
ALKERMES PLC.ALKS— Latest position per institution from SEC 13F filings
15
Institutional holders
176.98M
Total shares held
6.77B
Estimated value
8.85M
Avg. position size
BLACKROCK, INC.
CIK 2012383
Shares
29.24M
Value
1.53B
Filed
Jun 30, 2026
BLACKROCK FINANCE, INC.
CIK 1364742
Shares
29.11M
Value
701.49M
Filed
Jun 30, 2024
VANGUARD GROUP INC
CIK 102909
Shares
18.01M
Value
503.85M
Filed
Dec 31, 2025
CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM
CIK 1081019
Shares
10.34M
Value
197.41K
Filed
Jun 30, 2026
BAKER BROS. ADVISORS LP
CIK 1263508
Shares
10.01M
Value
524.59M
Filed
Jun 30, 2026
VANGUARD PORTFOLIO MANAGEMENT LLC
CIK 2100121
Shares
9.49M
Value
497.27M
Filed
Jun 30, 2026
STATE STREET CORP
CIK 93751
Shares
9.16M
Value
479.97M
Filed
Jun 30, 2026
VANGUARD CAPITAL MANAGEMENT LLC
CIK 2100119
Shares
7.52M
Value
393.75M
Filed
Jun 30, 2026
SARISSA CAPITAL MANAGEMENT LP
CIK 1577524
Shares
7.04M
Value
197.25M
Filed
Sep 30, 2023
PRICE T ROWE ASSOCIATES INC /MD/
CIK 80255
Shares
6.74M
Value
353K
Filed
Jun 30, 2026
RENAISSANCE TECHNOLOGIES LLC
CIK 1037389
Shares
6.46M
Value
338.52M
Filed
Jun 30, 2026
PICTET ASSET MANAGEMENT SA
CIK 1361570
Shares
4.79M
Value
150.07M
Filed
Jun 30, 2023
GEODE CAPITAL MANAGEMENT, LLC
CIK 1214717
Shares
4.48M
Value
234.66M
Filed
Jun 30, 2026
DIMENSIONAL FUND ADVISORS LP
CIK 354204
Shares
4.19M
Value
219.79M
Filed
Jun 30, 2026
DEEP TRACK CAPITAL, LP
CIK 1856083
Shares
4M
Value
209.58M
Filed
Jun 30, 2026
AMERICAN CENTURY COMPANIES INC
CIK 748054
Shares
3.95M
Value
207.18M
Filed
Jun 30, 2026
HOLOCENE ADVISORS, LP
CIK 1700574
Shares
3.95M
Value
207.04M
Filed
Jun 30, 2026
COMMODORE CAPITAL LP
CIK 1831942
Shares
3M
Value
157.19M
Filed
Jun 30, 2026
WELLINGTON MANAGEMENT GROUP LLP
CIK 902219
Shares
2.81M
Value
147.48M
Filed
Jun 30, 2026
HARDMAN JOHNSTON GLOBAL ADVISORS LLC
CIK 1006364
Shares
2.67M
Value
72.41M
Filed
Mar 31, 2024
| # | Institution | CIK | Shares | Est. Value | Period |
|---|---|---|---|---|---|
| 1 | BLACKROCK, INC. | 2012383 | 29.24M | 1.53B | Jun 30, 2026 |
| 2 | BLACKROCK FINANCE, INC. | 1364742 | 29.11M | 701.49M | Jun 30, 2024 |
| 3 | VANGUARD GROUP INC | 102909 | 18.01M | 503.85M | Dec 31, 2025 |
| 4 | CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM | 1081019 | 10.34M | 197.41K | Jun 30, 2026 |
| 5 | BAKER BROS. ADVISORS LP | 1263508 | 10.01M | 524.59M | Jun 30, 2026 |
| 6 | VANGUARD PORTFOLIO MANAGEMENT LLC | 2100121 | 9.49M | 497.27M | Jun 30, 2026 |
| 7 | STATE STREET CORP | 93751 | 9.16M | 479.97M | Jun 30, 2026 |
| 8 | VANGUARD CAPITAL MANAGEMENT LLC | 2100119 | 7.52M | 393.75M | Jun 30, 2026 |
| 9 | SARISSA CAPITAL MANAGEMENT LP | 1577524 | 7.04M | 197.25M | Sep 30, 2023 |
| 10 | PRICE T ROWE ASSOCIATES INC /MD/ | 80255 | 6.74M | 353K | Jun 30, 2026 |
| 11 | RENAISSANCE TECHNOLOGIES LLC | 1037389 | 6.46M | 338.52M | Jun 30, 2026 |
| 12 | PICTET ASSET MANAGEMENT SA | 1361570 | 4.79M | 150.07M | Jun 30, 2023 |
| 13 | GEODE CAPITAL MANAGEMENT, LLC | 1214717 | 4.48M | 234.66M | Jun 30, 2026 |
| 14 | DIMENSIONAL FUND ADVISORS LP | 354204 | 4.19M | 219.79M | Jun 30, 2026 |
| 15 | DEEP TRACK CAPITAL, LP | 1856083 | 4M | 209.58M | Jun 30, 2026 |
| 16 | AMERICAN CENTURY COMPANIES INC | 748054 | 3.95M | 207.18M | Jun 30, 2026 |
| 17 | HOLOCENE ADVISORS, LP | 1700574 | 3.95M | 207.04M | Jun 30, 2026 |
| 18 | COMMODORE CAPITAL LP | 1831942 | 3M | 157.19M | Jun 30, 2026 |
| 19 | WELLINGTON MANAGEMENT GROUP LLP | 902219 | 2.81M | 147.48M | Jun 30, 2026 |
| 20 | HARDMAN JOHNSTON GLOBAL ADVISORS LLC | 1006364 | 2.67M | 72.41M | Mar 31, 2024 |
Data sourced from SEC Form 13F institutional holdings reports. Positions reflect the most recent filing per institution.