Latest Period
Q1 2026
Security Snapshot
Alkermes plc. - COMMON STOCK (ALKS) Institutional Ownership
CUSIP: G01767105
13F Institutional Holders and Ownership History from Q1 2014 to Q1 2026
Institutions Reporting
382
Shares (Excl. Options)
175,189,158
Price
$35.36
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- Type / Class
- Equity / COMMON STOCK
- Symbol
- ALKS on Nasdaq
- Shares outstanding
- 166,591,536
- Price per share
- $33.91
- All holders as of 31 Mar 2026
- Q1 2026
- Total 13F shares
- 175,189,158
- Total reported value
- $6,161,534,282
- % of total 13F portfolios
- 0.01%
- Share change
- -4,231,174
- Value change
- -$91,158,298
- Number of holders
- 382
- Price from insider filings
- $33.91
Reported Shares, Excluding Options vs Price
Reported Value, Excluding Options
Total Investors
Key facts
- ALKS - Alkermes plc. - COMMON STOCK is tracked under CUSIP G01767105.
- 382 institutions reported positions in Q1 2026.
- 7 significant owners is listed from Schedule 13D/13G reporting.
Change
- Holder count moved from 361 to 382 between Q4 2025 and Q1 2026.
- Reported value moved from $5,046,956,922 to $6,161,534,282.
Research use
- You can quickly see who holds this security, then open quarter and manager detail pages for full evidence.
- 13F and Schedule 13D/13G sections are kept together so you can cross-check institutional and beneficial ownership context.
Evidence
Source: SEC Form 13F
Open SEC Evidence
Latest holder context comes from 382 institutions filings for Q1 2026.
Security key
G01767105
Latest holder period
Q1 2026
13F holders
382
13D/G owners
7
CIK / CUSIP context first
Open Q1 2026 holders
ALKS full holder history
Alkermes plc. SEC filings
Alkermes plc. company facts
Alkermes plc. insider transactions
Broader feeds
Recent Quarterly Holder Reports
Open recent reporting periods for CUSIP G01767105:
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 | |||
| BAKER BROS. ADVISORS LP | 6.1% | $280,143,231 | 10,012,267 | Baker Bros. Advisors LP | 31 Dec 2025 | |||
| VANGUARD PORTFOLIO MANAGEMENT LLC | 5.8% | $341,119,900 | 9,647,056 | Vanguard Portfolio Management | 31 Mar 2026 | |||
| VANGUARD CAPITAL MANAGEMENT LLC | 5.2% | $306,814,760 | 8,676,888 | Vanguard Capital Management | 31 Mar 2026 | |||
| 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 | |||
| PRICE T ROWE ASSOCIATES INC /MD/ | 2.8% | -55% | $154,023,870 | -$177,559,668 | 4,664,563 | -54% | T. Rowe Price Associates, Inc. | 31 Mar 2026 |
As of 31 Mar 2026, 382 institutional investors reported holding 175,189,158 shares of Alkermes plc. - COMMON STOCK (ALKS). This represents 105% of the company’s total 166,591,536 outstanding shares.
Top 25 Institutional Shareholders
The largest institutional shareholders of Alkermes plc. - COMMON STOCK (ALKS) together control 78% 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% | 28,314,410 | +0.15% | 0.02% | $1,001,197,538 |
| BAKER BROS. ADVISORS LP | 6% | 10,012,267 | 0% | 2% | $354,033,761 |
| VANGUARD PORTFOLIO MANAGEMENT LLC | 5.7% | 9,511,112 | 0% | 0.02% | $336,312,920 |
| STATE STREET CORP | 5.7% | 9,465,286 | -0.08% | 0.01% | $334,692,513 |
| VANGUARD CAPITAL MANAGEMENT LLC | 4.5% | 7,427,397 | 0% | 0.01% | $262,632,758 |
| RENAISSANCE TECHNOLOGIES LLC | 3.7% | 6,160,428 | -7.6% | 0.34% | $217,832,734 |
| AMERICAN CENTURY COMPANIES INC | 3.6% | 6,072,103 | +1.9% | 0.11% | $214,709,656 |
| PRICE T ROWE ASSOCIATES INC /MD/ | 2.8% | 4,664,576 | -48% | 0.02% | $164,940,000 |
| DIMENSIONAL FUND ADVISORS LP | 2.7% | 4,522,378 | +2.5% | 0.03% | $159,850,354 |
| Commodore Capital LP | 2.5% | 4,200,000 | +18% | 8.6% | $148,512,000 |
| GEODE CAPITAL MANAGEMENT, LLC | 2.5% | 4,182,267 | +2.5% | 0.01% | $147,910,817 |
| JPMORGAN CHASE & CO | 2.5% | 4,101,789 | -21% | 0.01% | $123,668,951 |
| Deep Track Capital, LP | 2.2% | 3,590,323 | +80% | 2.6% | $126,953,821 |
| WELLINGTON MANAGEMENT GROUP LLP | 1.8% | 2,970,166 | -1.7% | 0.02% | $105,025,069 |
| FIRST TRUST ADVISORS LP | 1.8% | 2,968,785 | +104% | 0.08% | $104,976,237 |
| PRIMECAP MANAGEMENT CO/CA/ | 1.5% | 2,539,990 | -0.95% | 0.07% | $89,814,046 |
| Nuveen, LLC | 1.5% | 2,460,569 | +1.4% | 0.02% | $87,005,720 |
| Holocene Advisors, LP | 1.4% | 2,317,326 | 0.2% | $81,940,647 | |
| CITADEL ADVISORS LLC | 1.3% | 2,241,584 | +87% | 0.06% | $79,262,410 |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC | 1.3% | 2,236,756 | +3.9% | 0.01% | $79,091,692 |
| BVF INC/IL | 1.2% | 2,000,000 | 2.3% | $70,720,000 | |
| Soleus Capital Management, L.P. | 1.2% | 1,970,864 | +49% | 2.8% | $69,689,751 |
| GOLDMAN SACHS GROUP INC | 1.1% | 1,882,178 | -17% | 0.01% | $66,553,814 |
| LOOMIS SAYLES & CO L P | 1.1% | 1,784,581 | -6.2% | 0.09% | $63,102,785 |
| MORGAN STANLEY | 1% | 1,736,091 | -8.1% | 0% | $61,388,191 |
Institutional Holders of Alkermes plc. - COMMON STOCK (ALKS) across Reporting Periods
| Period | Reported Shares, Excl. Options | Value, Excl. Options | Value Change | Price (Median) | Investors |
|---|---|---|---|---|---|
| 2026 Q1 | 175,189,158 | $6,161,534,282 | -$91,158,298 | $35.36 | 382 |
| 2025 Q4 | 180,338,114 | $5,046,956,922 | +$292,005,523 | $27.98 | 361 |
| 2025 Q3 | 169,341,595 | $5,079,979,539 | +$19,240,212 | $30.00 | 352 |
| 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 |