AlkermesALKS
13F holders, Q4 2025 (December 31)366holders +8
44new positions
46sold out
9famous investors
$27.99avg. 13F price*
At the end of Q4 2025, 366 institutions reported holding Alkermes PLC (ALKS) in their 13F filings, up 8 from Q3 2025. 44 opened new positions and 46 sold out. The largest holders were BlackRock, Inc. ($791.1M), Vanguard Group Inc. ($503.8M) and Baker Bros. Advisors LP ($280.1M). 9 famous investors held it, including Jim Simons / Peter Brown (0.3% of Renaissance Technologies's portfolio), Ray Dalio (0.0% of Bridgewater Associates's portfolio) and Ken Griffin (0.0% of Citadel Advisors's portfolio).
- Company
- Alkermes PLC
- CUSIP
- G01767105
- Latest filing quarter
- Q2 2026
History
Number of 13F holders
Total Exit/New Position Q3 2025 → Q4 2025
| Institutions | Total Value | |
|---|---|---|
| New Positions | 44 | $160.3M |
| Exits | 46 | $210.7M |
All 13F filers, Q3 2025 → Q4 2025: 24,725,551 shares bought and 16,035,232 shares sold, net +8,690,319 shares. Counts holders who added, trimmed, opened or closed a position; split-adjusted.
Ownership 366 holders
| BlackRock, Inc. | 0.01% | Add +1.1% | 28,272,412 | $791.1M |
| Vanguard Group Inc. | 0.01% | Reduce -0.9% | 18,007,364 | $503.8M |
| Baker Bros. Advisors LP | 1.65% | Add +23.7% | 10,012,267 | $280.1M |
| State Street Corp. | 0.01% | Add +10.9% | 9,472,858 | $265.1M |
| T. Rowe Price Associates Inc. | 0.03% | Reduce -12.1% | 8,998,963 | $251.8M |
| Renaissance Technologies | 0.29% | Add +6.0% | 6,668,028 | $186.6M |
| American Century Companies Inc. | 0.08% | Add +35.5% | 5,956,824 | $166.7M |
| JPMorgan Chase & Co. | 0.01% | Add +32.0% | 5,184,547 | $145.1M |
| Dimensional Fund Advisors LP | 0.03% | Add +19.3% | 4,412,783 | $123.5M |
| Geode Capital Management, LLC | 0.01% | Add +0.5% | 4,080,776 | $114.2M |
| Commodore Capital LP | 6.61% | Add +14.6% | 3,550,000 | $99.3M |
| Wellington Management Group LLP | 0.01% | Add +705.0% | 3,020,442 | $84.5M |
| Primecap Management Co. | 0.05% | Reduce -7.1% | 2,564,300 | $71.7M |
| UBS Group AG | 0.01% | Add +237.4% | 2,544,895 | $71.2M |
| Nuveen, LLC | 0.02% | Add +11.7% | 2,427,028 | $67.9M |
| Goldman Sachs Group Inc. | 0.01% | Add +13.7% | 2,267,588 | $63.4M |
| Charles Schwab Investment Management Inc. | 0.01% | Add +0.6% | 2,152,756 | $60.2M |
| Deep Track Capital, LP | 1.28% | New | 2,000,000 | $56.0M |
| Norges Bank | 0.01% | — | 1,945,734 | $54.4M |
| Loomis Sayles & Co. L P | 0.06% | Reduce -7.1% | 1,902,522 | $53.2M |
| Morgan Stanley | 0.00% | Add +21.7% | 1,888,487 | $52.8M |
| RTW Investments, LP | 0.47% | No change | 1,672,356 | $46.8M |
| Northern Trust Corp. | 0.01% | Reduce -6.4% | 1,653,475 | $46.3M |
| Pictet Asset Management Holding SA | 0.04% | Add +65.4% | 1,477,214 | $41.3M |
| First Trust Advisors LP | 0.03% | Add +4.0% | 1,454,002 | $40.7M |
| Arrowstreet Capital, Limited Partnership | 0.02% | Add +20.0% | 1,450,841 | $40.6M |
| Avoro Capital Advisors LLC | 0.39% | Reduce -37.5% | 1,400,000 | $39.2M |
| FMR LLC | 0.00% | Add +4.6% | 1,355,253 | $37.9M |
| Artisan Partners Limited Partnership | 0.06% | Reduce -36.0% | 1,349,122 | $37.7M |
| Bank of America Corp. | 0.00% | Add +21.6% | 1,333,105 | $37.3M |
| Soleus Capital Management, L.P. | 1.57% | New | 1,322,364 | $37.0M |
| Two Sigma Investments, LP | 0.05% | Add +84.8% | 1,213,397 | $34.0M |
| Citadel Advisors | 0.02% | Add +70.0% | 1,198,268 | $33.5M |
| Squarepoint Ops LLC | 0.06% | Add +146.1% | 1,095,846 | $30.7M |
| Bank of New York Mellon Corp | 0.01% | Reduce -24.6% | 1,074,087 | $30.1M |
| Affinity Asset Advisors, LLC | 2.07% | Reduce -20.0% | 1,000,000 | $28.0M |
| VIRGINIA RETIREMENT SYSTEMS ET Al | 0.16% | Add +8.3% | 976,483 | $27.3M |
| Principal Financial Group Inc. | 0.01% | Add +5.3% | 947,623 | $26.5M |
| Panagora Asset Management Inc. | 0.09% | Add +4.7% | 928,964 | $26.0M |
| D. E. Shaw & Co. | 0.02% | Add +72.3% | 911,272 | $25.5M |
| Driehaus Capital Management LLC | 0.15% | Reduce -3.7% | 796,968 | $22.3M |
| Frazier Life Sciences Management, L.P. | 0.53% | No change | 700,647 | $19.6M |
| Balyasny Asset Management L.P. | 0.04% | New | 679,633 | $19.0M |
| Pacer Advisors, Inc. | 0.05% | Reduce -16.5% | 674,874 | $18.9M |
| Public Sector Pension Investment Board | 0.06% | Reduce -5.6% | 671,170 | $18.8M |
| Segall Bryant & Hamill, LLC | 0.23% | Add +3.1% | 615,292 | $17.2M |
| Barclays PLC | 0.01% | Add +1.5% | 565,033 | $15.8M |
| Two Sigma Advisers, LP | 0.03% | Add +174.2% | 562,587 | $15.7M |
| Woodline Partners LP | 0.06% | No change | 558,567 | $15.6M |
| Invesco Ltd. | 0.00% | Reduce -7.8% | 538,716 | $15.1M |
| Ameriprise Financial Inc. | 0.00% | Reduce -4.8% | 531,362 | $14.9M |
| MetLife Investment Management, LLC | 0.07% | Reduce -25.0% | 530,379 | $14.8M |
| Acadian Asset Management LLC | 0.02% | Reduce -8.2% | 522,097 | $14.6M |
| AQR Capital Management | 0.01% | Add +38.1% | 514,324 | $14.4M |
| Voya Investment Management LLC | 0.02% | Reduce -6.0% | 501,807 | $14.0M |
| Opaleye Management Inc. | 1.81% | Add +8.9% | 490,000 | $13.7M |
| Rhumbline Advisers | 0.01% | Reduce -7.3% | 439,195 | $12.3M |
| BNP Paribas Financial Markets | 0.01% | Reduce -43.5% | 430,330 | $12.0M |
| Legal & General Group Plc | 0.00% | Reduce -14.0% | 429,497 | $12.0M |
| Glenmede Trust Co. NA | 0.05% | — | 412,920 | $11.6M |
| Victory Capital Management Inc. | 0.01% | Add +17.0% | 402,578 | $11.3M |
| UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC | 0.00% | Add +0.6% | 394,853 | $11.0M |
| Fisher Asset Management | 0.00% | Add +21.0% | 390,493 | $10.9M |
| Rice Hall James & Associates, LLC | 0.58% | Reduce -1.5% | 379,458 | $10.6M |
| Nomura Asset Management International Inc. | 0.02% | — | 361,387 | $10.1M |
| Allianz Asset Management GmbH | 0.01% | Reduce -33.8% | 347,308 | $9.7M |
| Bridgewater Associates | 0.04% | New | 344,452 | $9.6M |
| Raymond James Financial Inc. | 0.00% | Reduce -26.6% | 328,205 | $9.1M |
| Royal Bank of Canada | 0.00% | Reduce -22.4% | 325,496 | $9.1M |
| California Public Employees Retirement System | 0.01% | Add +1.1% | 324,578 | $9.1M |
| Man Group plc | 0.02% | Reduce -65.2% | 312,512 | $8.7M |
| Canada Pension Plan Investment Board | 0.01% | Reduce -25.3% | 310,600 | $8.7M |
| Swiss National Bank | 0.01% | Add +1.8% | 309,200 | $8.7M |
| Edgestream Partners, L.P. | 0.23% | Add +12.3% | 291,299 | $8.2M |
| Robeco Institutional Asset Management B.V. | 0.01% | Add +112.6% | 285,670 | $8.0M |
| Qube Research & Technologies Ltd | 0.01% | New | 276,558 | $7.7M |
| Voloridge Investment Management, LLC | 0.03% | Add +3.3% | 273,158 | $7.6M |
| Peregrine Capital Management LLC | 0.22% | Reduce -1.3% | 254,333 | $7.1M |
| C WorldWide Group Holding A/S | 0.12% | No change | 250,000 | $7.0M |
| Palo Alto Investors LP | 0.94% | Add +31.9% | 242,560 | $6.8M |
| Atle Fund Management AB | 2.16% | Reduce -4.1% | 242,473 | $6.8M |
| BNP PARIBAS ASSET MANAGEMENT Holding S.A. | 0.01% | Add +13469.7% | 241,133 | $6.7M |
| Wells Fargo & Company | 0.00% | Add +75.7% | 232,987 | $6.5M |
| Abacus FCF Advisors LLC | 0.80% | New | 219,495 | $6.1M |
| Alliancebernstein L.P. | 0.00% | Reduce -9.5% | 215,854 | $6.0M |
| Rafferty Asset Management, LLC | 0.02% | Add +13.0% | 203,264 | $5.7M |
| S&co Inc. | 0.35% | Add +0.3% | 201,760 | $5.6M |
| HRT Financial LP | 0.02% | Add +995.5% | 200,224 | $5.6M |
| Prudential Financial Inc. | 0.01% | Reduce -7.3% | 194,505 | $5.4M |
| Universal- Beteiligungs- und Servicegesellschaft mbH | 0.01% | Add +39.8% | 194,530 | $5.4M |
| Franklin Resources Inc. | 0.00% | Add +4.6% | 192,807 | $5.4M |
| Sei Investments Co. | 0.01% | Reduce -15.5% | 190,717 | $5.3M |
| Wedge Capital Management L L P | 0.09% | Add +22.1% | 172,250 | $4.8M |
| Martingale Asset Management L P | 0.12% | Add +3.1% | 170,267 | $4.8M |
| Intech Investment Management LLC | 0.04% | Add +115.5% | 159,581 | $4.5M |
| Bessemer Group Inc. | 0.01% | Add +6994.5% | 157,640 | $4.4M |
| Russell Investments Group, Ltd. | 0.00% | Reduce -12.3% | 157,359 | $4.4M |
| Neuberger Berman Group LLC | 0.00% | Add +0.0% | 152,772 | $4.3M |
| Capital Fund Management S.A. | 0.04% | Add +24.6% | 150,775 | $4.2M |
| New York State Common Retirement Fund | 0.01% | Reduce -23.8% | 149,284 | $4.2M |
"% of holder's portfolio" is ALKS's weight in each manager's 13F, not the share of Alkermes PLC the manager owns.