ALKERMES PLC.

PublicCIK: 1520262
ALKSNASDAQ
Location

DUBLIN 4, L2

13F Filings

Institutional Holders

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

1

BLACKROCK, INC.

CIK 2012383

Shares

29.24M

Value

1.53B

Filed

Jun 30, 2026

2

BLACKROCK FINANCE, INC.

CIK 1364742

Shares

29.11M

Value

701.49M

Filed

Jun 30, 2024

3

VANGUARD GROUP INC

CIK 102909

Shares

18.01M

Value

503.85M

Filed

Dec 31, 2025

4

CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM

CIK 1081019

Shares

10.34M

Value

197.41K

Filed

Jun 30, 2026

5

BAKER BROS. ADVISORS LP

CIK 1263508

Shares

10.01M

Value

524.59M

Filed

Jun 30, 2026

6

VANGUARD PORTFOLIO MANAGEMENT LLC

CIK 2100121

Shares

9.49M

Value

497.27M

Filed

Jun 30, 2026

7

STATE STREET CORP

CIK 93751

Shares

9.16M

Value

479.97M

Filed

Jun 30, 2026

8

VANGUARD CAPITAL MANAGEMENT LLC

CIK 2100119

Shares

7.52M

Value

393.75M

Filed

Jun 30, 2026

9

SARISSA CAPITAL MANAGEMENT LP

CIK 1577524

Shares

7.04M

Value

197.25M

Filed

Sep 30, 2023

10

PRICE T ROWE ASSOCIATES INC /MD/

CIK 80255

Shares

6.74M

Value

353K

Filed

Jun 30, 2026

11

RENAISSANCE TECHNOLOGIES LLC

CIK 1037389

Shares

6.46M

Value

338.52M

Filed

Jun 30, 2026

12

PICTET ASSET MANAGEMENT SA

CIK 1361570

Shares

4.79M

Value

150.07M

Filed

Jun 30, 2023

13

GEODE CAPITAL MANAGEMENT, LLC

CIK 1214717

Shares

4.48M

Value

234.66M

Filed

Jun 30, 2026

14

DIMENSIONAL FUND ADVISORS LP

CIK 354204

Shares

4.19M

Value

219.79M

Filed

Jun 30, 2026

15

DEEP TRACK CAPITAL, LP

CIK 1856083

Shares

4M

Value

209.58M

Filed

Jun 30, 2026

16

AMERICAN CENTURY COMPANIES INC

CIK 748054

Shares

3.95M

Value

207.18M

Filed

Jun 30, 2026

17

HOLOCENE ADVISORS, LP

CIK 1700574

Shares

3.95M

Value

207.04M

Filed

Jun 30, 2026

18

COMMODORE CAPITAL LP

CIK 1831942

Shares

3M

Value

157.19M

Filed

Jun 30, 2026

19

WELLINGTON MANAGEMENT GROUP LLP

CIK 902219

Shares

2.81M

Value

147.48M

Filed

Jun 30, 2026

20

HARDMAN JOHNSTON GLOBAL ADVISORS LLC

CIK 1006364

Shares

2.67M

Value

72.41M

Filed

Mar 31, 2024

Data sourced from SEC Form 13F institutional holdings reports. Positions reflect the most recent filing per institution.