AlkermesALKS
13F holders, Q2 2026 (June 30)424holders +34
85new positions
49sold out
8famous investors
$52.38avg. 13F price*
At the end of Q2 2026, 424 institutions reported holding Alkermes PLC (ALKS) in their 13F filings, up 34 from Q1 2026. 85 opened new positions and 49 sold out. The largest holders were BlackRock, Inc. ($1.5B), Baker Bros. Advisors LP ($524.6M) and Vanguard Portfolio Management LLC ($497.3M). 8 famous investors held it, including Jim Simons / Peter Brown (0.5% of Renaissance Technologies's portfolio), Ken Griffin (0.1% of Citadel Advisors's portfolio) and David E. Shaw (0.0% of D. E. Shaw & Co.'s portfolio).
- Company
- Alkermes PLC
- CUSIP
- G01767105
- Latest filing quarter
- Q2 2026
History
Number of 13F holders
Total Exit/New Position Q1 2026 → Q2 2026
| Institutions | Total Value | |
|---|---|---|
| New Positions | 85 | $292.8M |
| Exits | 49 | $115.9M |
All 13F filers, Q1 2026 → Q2 2026: 20,389,318 shares bought and 21,003,582 shares sold, net −614,264 shares. Counts holders who added, trimmed, opened or closed a position; split-adjusted.
Ownership 424 holders
| BlackRock, Inc. | 0.02% | Add +3.3% | 29,235,739 | $1.5B |
| Baker Bros. Advisors LP | 2.64% | No change | 10,012,267 | $524.6M |
| Vanguard Portfolio Management LLC | 0.02% | Reduce -0.2% | 9,490,818 | $497.3M |
| State Street Corp. | 0.01% | Reduce -3.2% | 9,160,575 | $480.0M |
| Vanguard Capital Management LLC | 0.01% | Add +1.2% | 7,515,025 | $393.7M |
| T. Rowe Price Associates Inc. | 0.04% | Add +44.4% | 6,737,328 | $353.0M |
| Renaissance Technologies | 0.47% | Add +4.9% | 6,460,928 | $338.5M |
| Geode Capital Management, LLC | 0.01% | Add +7.1% | 4,477,876 | $234.7M |
| Dimensional Fund Advisors LP | 0.04% | Reduce -7.2% | 4,194,873 | $219.8M |
| Deep Track Capital, LP | 3.09% | Add +11.4% | 4,000,000 | $209.6M |
| American Century Companies Inc. | 0.09% | Reduce -34.9% | 3,954,239 | $207.2M |
| Holocene Advisors, LP | 0.43% | Add +55.4% | 3,601,472 | $188.7M |
| Commodore Capital LP | 9.36% | Reduce -28.6% | 3,000,000 | $157.2M |
| Wellington Management Group LLP | 0.03% | Reduce -5.2% | 2,814,804 | $147.5M |
| Primecap Management Co. | 0.08% | Reduce -0.5% | 2,528,680 | $132.5M |
| First Trust Advisors LP | 0.07% | Reduce -18.4% | 2,421,016 | $126.8M |
| Charles Schwab Investment Management Inc. | 0.02% | Add +4.4% | 2,335,117 | $122.3M |
| Nuveen, LLC | 0.03% | Reduce -5.5% | 2,324,197 | $121.8M |
| Norges Bank | 0.01% | — | 2,156,814 | $113.0M |
| BVF Inc. | 2.89% | Add +7.7% | 2,154,704 | $112.9M |
| Goldman Sachs Group Inc. | 0.01% | Add +7.5% | 2,023,984 | $106.0M |
| Bain Capital Life Sciences Investors, LLC | 6.04% | Add +217.7% | 1,937,938 | $101.5M |
| Northern Trust Corp. | 0.01% | Add +7.9% | 1,831,619 | $96.0M |
| Morgan Stanley | 0.00% | Add +0.9% | 1,751,882 | $91.8M |
| RTW Investments, LP | 0.75% | No change | 1,672,356 | $87.6M |
| Citadel Advisors | 0.05% | Reduce -26.6% | 1,645,101 | $86.2M |
| Loomis Sayles & Co. L P | 0.10% | Reduce -11.2% | 1,585,518 | $83.1M |
| Adage Capital Partners Gp, L.L.C. | 0.10% | New | 1,368,000 | $71.7M |
| D. E. Shaw & Co. | 0.05% | Add +84.7% | 1,312,031 | $68.7M |
| Driehaus Capital Management LLC | 0.38% | Add +56.4% | 1,238,809 | $64.9M |
| Vanguard Fiduciary Trust Co. | 0.01% | Add +4.3% | 1,177,945 | $61.7M |
| Franklin Resources Inc. | 0.01% | Add +541.1% | 1,170,242 | $61.3M |
| BNP PARIBAS ASSET MANAGEMENT Holding S.A. | 0.06% | Add +383.7% | 1,159,216 | $60.7M |
| FMR LLC | 0.00% | Reduce -14.3% | 1,134,410 | $59.4M |
| Affinity Asset Advisors, LLC | 2.93% | Reduce -16.7% | 1,125,000 | $58.9M |
| Bank of New York Mellon Corp | 0.01% | Add +5.9% | 1,097,282 | $57.5M |
| T. Rowe Price Investment Management, Inc. | 0.04% | Add +22.0% | 1,090,947 | $57.2M |
| Two Sigma Investments, LP | 0.04% | Add +33.0% | 1,038,311 | $54.4M |
| Soleus Capital Management, L.P. | 1.86% | Reduce -47.8% | 1,029,252 | $53.9M |
| Principal Financial Group Inc. | 0.03% | Add +2.7% | 983,822 | $51.5M |
| Marshall Wace, LLP | 0.04% | Reduce -2.9% | 969,954 | $50.8M |
| Summit Partners Public Asset Management, LLC | 1.29% | New | 950,234 | $49.8M |
| Bank of America Corp. | 0.00% | Reduce -24.2% | 918,303 | $48.1M |
| Victory Capital Management Inc. | 0.03% | Add +196.7% | 916,709 | $48.0M |
| Pictet Asset Management Holding SA | 0.04% | Reduce -11.1% | 838,026 | $44.0M |
| Artisan Partners Limited Partnership | 0.07% | Reduce -25.3% | 831,006 | $43.5M |
| Panagora Asset Management Inc. | 0.12% | Reduce -17.9% | 765,543 | $40.1M |
| Frazier Life Sciences Management, L.P. | 0.80% | No change | 700,647 | $36.7M |
| Public Sector Pension Investment Board | 0.09% | No change | 677,405 | $35.5M |
| Frontier Capital Management Co. LLC | 0.32% | New | 659,562 | $34.6M |
| BNP Paribas Financial Markets | 0.02% | Add +24.1% | 655,140 | $34.3M |
| Ameriprise Financial Inc. | 0.01% | Reduce -14.9% | 630,325 | $33.0M |
| Woodline Partners LP | 0.09% | Add +0.3% | 560,282 | $29.4M |
| Spruce Street Capital LP | 5.59% | Add +71.0% | 543,876 | $28.5M |
| MetLife Investment Management, LLC | 0.12% | Add +477.3% | 512,924 | $26.9M |
| Segall Bryant & Hamill, LLC | 0.31% | Reduce -14.9% | 498,222 | $26.1M |
| Artia Global Partners LP | 4.47% | New | 448,964 | $23.5M |
| Invesco Ltd. | 0.00% | Reduce -15.5% | 443,107 | $23.2M |
| Raymond James Financial Inc. | 0.01% | Add +33.2% | 422,761 | $22.2M |
| Fisher Asset Management | 0.01% | Add +7.3% | 419,102 | $22.0M |
| Gendell Jeffrey L | 0.19% | Add +50.2% | 395,882 | $20.7M |
| Prosight Management, LP | 3.56% | Reduce -23.2% | 394,389 | $20.7M |
| Legal & General Group Plc | 0.00% | Add +3.4% | 393,524 | $20.6M |
| Rice Hall James & Associates, LLC | 1.00% | Add +0.1% | 390,866 | $20.5M |
| Rhumbline Advisers | 0.02% | Reduce -13.7% | 387,999 | $20.3M |
| Glenmede Trust Co. NA | 0.08% | Reduce -4.5% | 361,184 | $18.9M |
| California Public Employees Retirement System | 0.01% | Add +5.8% | 347,246 | $18.2M |
| Nomura Asset Management International Inc. | 0.03% | Reduce -0.9% | 337,043 | $17.7M |
| Ensign Peak Advisors, Inc | 0.03% | Add +3498.2% | 335,208 | $17.6M |
| Millennium Management | 0.01% | New | 319,595 | $16.7M |
| Swiss National Bank | 0.01% | Add +2.1% | 316,900 | $16.6M |
| UBS Group AG | 0.00% | Reduce -39.3% | 300,350 | $15.7M |
| Eagle Health Investments LP | 2.58% | Add +24.6% | 297,302 | $15.6M |
| GW&K Investment Management, LLC | 0.12% | New | 292,387 | $15.3M |
| Senator Investment Group LP | 0.53% | Add +17.0% | 275,000 | $14.4M |
| JPMorgan Chase & Co. | 0.00% | Reduce -93.6% | 262,721 | $14.2M |
| Neuberger Berman Group LLC | 0.01% | Add +31.9% | 260,208 | $13.6M |
| C WorldWide Group Holding A/S | 0.32% | No change | 250,000 | $13.1M |
| Stempoint Capital LP | 2.25% | Add +208.1% | 248,015 | $13.0M |
| S&co Inc. | 0.74% | No change | 244,760 | $12.8M |
| Palo Alto Investors LP | 1.76% | No change | 242,560 | $12.7M |
| Peregrine Capital Management LLC | 0.40% | Reduce -4.8% | 232,255 | $12.2M |
| Russell Investments Group, Ltd. | 0.01% | Add +125.5% | 222,624 | $11.7M |
| Federated Hermes, Inc. | 0.02% | Add +652.2% | 221,589 | $11.6M |
| Barclays PLC | 0.00% | Add +25.7% | 219,935 | $11.5M |
| Amundi | 0.00% | Add +236.5% | 217,739 | $11.4M |
| Atle Fund Management AB | 3.01% | Reduce -12.0% | 213,329 | $11.2M |
| AQR Capital Management | 0.00% | Reduce -44.5% | 212,968 | $11.2M |
| Rock Springs Capital Management LP | 0.51% | Add +8.6% | 199,811 | $10.5M |
| Wells Fargo & Company | 0.00% | Add +69.1% | 199,433 | $10.4M |
| California State Teachers Retirement System | 0.01% | Add +7.4% | 197,412 | $10.3M |
| Schonfeld Strategic Advisors LLC | 0.05% | Add +1076.9% | 195,174 | $10.2M |
| Aberdeen Group plc | 0.01% | New | 193,805 | $10.2M |
| Deutsche Bank AG | 0.00% | Add +27.8% | 191,316 | $10.0M |
| Tetragon Partners GP Ltd | 1.62% | Add +18.9% | 189,979 | $10.0M |
| Rhenman & Partners Asset Management AB | 0.92% | Add +39.0% | 185,250 | $9.7M |
| Citigroup Inc. | 0.00% | Add +289.7% | 184,901 | $9.7M |
| HighVista Strategies LLC | 2.14% | Add +144.9% | 179,256 | $9.4M |
| Martingale Asset Management L P | 0.21% | Reduce -12.7% | 170,004 | $8.9M |
| SG Americas Securities, LLC | 0.01% | Reduce -8.2% | 164,236 | $8.6M |
"% of holder's portfolio" is ALKS's weight in each manager's 13F, not the share of Alkermes PLC the manager owns.