Alkermes plc. - COMMON STOCK (ALKS) Institutional Ownership

13F Institutional Holders and Ownership History from Q1 2014 to Q4 2025

Type / Class
Equity / COMMON STOCK
Symbol
ALKS on Nasdaq
Shares outstanding
164,237,519
Price per share
$27.98
All holders as of 30 Sep 2025
Q3 2025
Total 13F shares
169,334,743
Total reported value
$5,079,773,979
% of total 13F portfolios
0%
Share change
+436,054
Value change
+$17,304,935
Number of holders
348
Price from insider filings
$27.98
Reported Shares, Excluding Options vs Price
Reported Value, Excluding Options
Total Investors

Significant Owners of Alkermes plc. - COMMON STOCK (ALKS) based on Schedule 13D/G filings

Filer Ownership Change % Holdings Value Net Change Nb Shares Change % Reporting Name Report Period
BlackRock, Inc. 16% $737,618,983 25,638,477 BlackRock, Inc. 31 Mar 2025
PRICE T ROWE ASSOCIATES INC /MD/ 6.1% $291,215,100 10,041,900 T. Rowe Price Associates, Inc. 30 Jun 2025
STATE STREET CORP 5.2% +6% $256,210,530 +$15,530,430 8,540,351 +6.5% STATE STREET CORPORATION 30 Sep 2025
WELLINGTON MANAGEMENT GROUP LLP 4.3% $201,749,136 7,012,483 Wellington Management Group LLP 31 Dec 2024

As of 30 Sep 2025, 348 institutional investors reported holding 169,334,743 shares of Alkermes plc. - COMMON STOCK (ALKS). This represents 103% of the company’s total 164,237,519 outstanding shares.

Top 25 Institutional Shareholders

The largest institutional shareholders of Alkermes plc. - COMMON STOCK (ALKS) together control 77% of the company’s outstanding shares — a level of ownership often associated with strong institutional conviction and long‑term capital commitment.

Institution Ownership % Shares Held Share Change % Portfolio % Holdings Value
BlackRock, Inc. 17% 27,972,078 +0.42% 0.01% $839,162,340
VANGUARD GROUP INC 11% 18,179,511 -1.7% 0.01% $545,385,330
PRICE T ROWE ASSOCIATES INC /MD/ 6.2% 10,238,357 +2% 0.03% $307,151,000
STATE STREET CORP 5.2% 8,540,351 +4% 0.01% $256,210,530
BAKER BROS. ADVISORS LP 4.9% 8,091,351 +26% 1.8% $242,740,530
RENAISSANCE TECHNOLOGIES LLC 3.8% 6,292,528 +8.3% 0.25% $188,775,840
AMERICAN CENTURY COMPANIES INC 2.7% 4,397,471 +20% 0.07% $131,924,203
GEODE CAPITAL MANAGEMENT, LLC 2.5% 4,061,394 +0.94% 0.01% $121,859,174
JPMORGAN CHASE & CO 2.4% 3,928,170 -19% 0.01% $117,845,101
DIMENSIONAL FUND ADVISORS LP 2.3% 3,697,996 +19% 0.02% $110,925,498
Commodore Capital LP 1.9% 3,096,754 +26% 4.5% $92,902,620
PRIMECAP MANAGEMENT CO/CA/ 1.7% 2,759,080 -4.9% 0.06% $82,772,400
Holocene Advisors, LP 1.5% 2,469,030 -13% 0.17% $74,070,900
Avoro Capital Advisors LLC 1.4% 2,240,000 -23% 0.87% $67,200,000
Nuveen, LLC 1.3% 2,173,476 +6.1% 0.02% $65,204,280
CHARLES SCHWAB INVESTMENT MANAGEMENT INC 1.3% 2,140,373 +2.3% 0.01% $64,211,190
Artisan Partners Limited Partnership 1.3% 2,109,772 +37% 0.09% $63,293,160
LOOMIS SAYLES & CO L P 1.2% 2,048,851 -2.9% 0.07% $61,465,530
GOLDMAN SACHS GROUP INC 1.2% 1,994,945 +20% 0.01% $59,848,350
NORTHERN TRUST CORP 1.1% 1,766,180 -2.6% 0.01% $52,985,400
Paradigm Biocapital Advisors LP 1% 1,719,334 +25% 1.5% $51,580,020
RTW INVESTMENTS, LP 1% 1,672,356 -64% 0.62% $50,170,680
MORGAN STANLEY 0.94% 1,551,499 -14% 0% $46,544,988
Bank of New York Mellon Corp 0.87% 1,424,466 -7.3% 0.01% $42,733,974
FIRST TRUST ADVISORS LP 0.85% 1,398,021 +0.05% 0.03% $41,940,630

Institutional Holders of Alkermes plc. - COMMON STOCK (ALKS) across Reporting Periods

Period Reported Shares, Excl. Options Value, Excl. Options Value Change Price (Median) Investors
2025 Q4 675,605 $19,090,322 -$3,028,363 $27.98 27
2025 Q3 169,334,743 $5,079,773,979 +$17,304,935 $30.00 348
2025 Q2 169,266,778 $4,842,815,839 -$75,320,709 $28.61 349
2025 Q1 170,391,411 $5,625,587,430 +$100,126,633 $33.02 368
2024 Q4 167,229,553 $4,809,633,445 -$340,228,488 $28.76 339
2024 Q3 178,773,963 $5,003,514,490 +$17,540,017 $27.99 333
2024 Q2 179,320,535 $4,321,913,080 +$60,416,487 $24.10 317
2024 Q1 176,001,012 $4,763,281,654 +$15,935,209 $27.07 330
2023 Q4 175,467,711 $4,867,418,321 +$343,345,772 $27.74 297
2023 Q3 163,842,866 $4,589,236,432 +$56,577,822 $28.01 304
2023 Q2 160,680,217 $5,027,116,770 -$5,814,531 $31.30 288
2023 Q1 161,604,443 $4,555,535,684 -$5,594,505 $28.19 263
2022 Q4 162,372,542 $4,242,746,855 +$91,252,041 $26.13 273
2022 Q3 159,945,390 $3,571,769,628 -$80,096,583 $22.33 264
2022 Q2 156,870,253 $4,672,860,939 -$21,124,857 $29.79 262
2022 Q1 157,878,224 $4,153,400,239 +$53,403,811 $26.31 231
2021 Q4 156,147,340 $3,631,040,518 +$68,229,141 $23.26 203
2021 Q3 152,381,294 $4,699,818,812 -$238,782,318 $30.84 218
2021 Q2 161,105,829 $3,950,984,222 +$103,219,618 $24.52 213
2021 Q1 157,785,504 $2,947,852,619 -$61,698,231 $18.68 187
2020 Q4 161,429,176 $3,221,459,094 +$68,763,873 $19.95 199
2020 Q3 164,899,645 $2,732,070,918 -$28,388,739 $16.57 172
2020 Q2 159,475,358 $3,094,659,758 +$117,571,354 $19.40 158
2020 Q1 155,925,157 $2,245,904,814 +$53,123,914 $14.42 180
2019 Q4 150,944,409 $3,073,788,187 +$423,384 $20.40 203
2019 Q3 150,569,586 $2,936,273,390 -$33,652,784 $19.51 195
2019 Q2 151,862,128 $3,422,077,720 -$92,876,895 $22.54 213
2019 Q1 153,784,455 $5,610,048,691 +$11,066,860 $36.49 208
2018 Q4 153,616,325 $4,532,644,691 -$144,802,272 $29.51 217
2018 Q3 157,824,160 $6,698,150,487 -$24,630,564 $42.44 251
2018 Q2 158,411,445 $6,519,905,291 -$85,276,877 $41.16 234
2018 Q1 159,900,599 $9,267,172,984 -$54,117,628 $57.96 260
2017 Q4 161,375,962 $8,831,086,069 +$455,579,024 $54.73 241
2017 Q3 153,133,133 $7,785,371,541 +$37,756,506 $50.84 238
2017 Q2 152,058,450 $8,814,804,310 +$242,074,699 $57.97 251
2017 Q1 149,415,077 $8,740,882,725 +$690,583,280 $58.50 256
2016 Q4 147,490,758 $8,196,995,490 +$131,757,071 $55.58 261
2016 Q3 145,304,666 $6,831,906,777 +$27,462,812 $47.03 249
2016 Q2 144,840,494 $6,260,859,620 -$11,196,936 $43.22 239
2016 Q1 145,549,048 $4,976,133,428 -$210,080,821 $34.19 228
2015 Q4 142,660,735 $11,324,045,961 -$438,127,760 $79.38 283
2015 Q3 148,061,579 $8,686,183,862 +$2,938,518 $58.67 261
2015 Q2 148,099,245 $9,528,260,933 +$184,513,519 $64.34 263
2015 Q1 145,257,546 $8,859,048,188 +$54,084,622 $60.97 258
2014 Q4 144,084,184 $8,446,969,957 +$76,426,626 $58.56 215
2014 Q3 141,202,533 $6,053,733,496 -$10,850,475 $42.87 201
2014 Q2 140,989,633 $7,095,211,445 +$192,715,103 $50.33 210
2014 Q1 137,511,902 $6,060,417,616 +$323,918,751 $44.09 213