ALKERMES PLC (ALKS)
Institutional ownership reported to the SEC as of Q2 2026, across 31 quarters.
395
Reporting holders
$9.1B
Reported value
102.3%
Of shares outstanding
1.2%
Held as options
+35
Holder change
Institutions report 171,682,453 shares against 167,763,272 outstanding. Shares only - option lines are excluded, which is why this can be compared with the company at all. The count comes from the cover page of the company's own most recent report, so it is dated when that was filed rather than at quarter end. Over 100% because an adviser and a sub-adviser can both report the same shares, and both are counted.
Options share is the part of reported value carried in derivative lines rather than shares. A high figure means institutions are expressing a view on this security without owning much of it.
Holders
| Filer | Value | Shares | Their book | Held | Change |
|---|---|---|---|---|---|
| BlackRock, Inc. | $1.5B | 29,235,739 | 0.02% | 8q | +3.3%+$48.3M |
| BAKER BROS. ADVISORS LP | $524.6M | 10,012,267 | 2.63% | 9q | HELD |
| VANGUARD PORTFOLIO MANAGEMENT LLC | $497.3M | 9,490,818 | 0.02% | 2q | HELD |
| STATE STREET CORP | $480.0M | 9,160,575 | 0.01% | 31q | -3.2%-$16.0M |
| VANGUARD CAPITAL MANAGEMENT LLC | $393.7M | 7,515,025 | 0.01% | 2q | +1.2%+$4.6M |
| RENAISSANCE TECHNOLOGIES LLC | $338.5M | 6,460,928 | 0.47% | 31q | +4.9%+$15.7M |
| GEODE CAPITAL MANAGEMENT, LLC | $234.7M | 4,477,876 | 0.01% | 31q | +7.1%+$15.5M |
| DIMENSIONAL FUND ADVISORS LP | $219.8M | 4,194,873 | 0.04% | 31q | -7.2%-$17.2M |
| Deep Track Capital, LP | $209.6M | 4,000,000 | 3.05% | 3q | +11.4%+$21.5M |
| AMERICAN CENTURY COMPANIES INC | $207.2M | 3,954,239 | 0.09% | 20q | -34.9%-$111.0M |
| Holocene Advisors, LP | $207.0M | 3,601,472 | 0.47% | 2q | +55.4%+$73.8M |
| Commodore Capital LP | $157.2M | 3,000,000 | 9.36% | 9q | -28.6%-$62.9M |
| WELLINGTON MANAGEMENT GROUP LLP | $147.5M | 2,814,804 | 0.03% | 31q | -5.2%-$8.1M |
| PRIMECAP MANAGEMENT CO/CA/ | $132.5M | 2,528,680 | 0.08% | 31q | HELD |
| FIRST TRUST ADVISORS LP | $126.8M | 2,421,016 | 0.07% | 31q | -18.5%-$28.7M |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC | $122.3M | 2,335,117 | 0.02% | 31q | +4.4%+$5.2M |
| Sixth Street Partners Management Company, L.P. | $122.3M | 2,335,117 | 0.02% | new | NEW |
| Nuveen, LLC | $121.8M | 2,324,197 | 0.03% | 6q | -5.5%-$7.1M |
| NORGES BANK | $113.0M | 2,156,814 | 0.01% | 32q | +10.8%+$11.1M |
| BVF INC/IL | $112.9M | 2,154,704 | 2.89% | 2q | +7.7%+$8.1M |
| GOLDMAN SACHS GROUP INC | $106.0M | 2,023,984 | 0.01% | 31q | +7.5%+$7.4M |
| Bain Capital Life Sciences Investors, LLC | $101.5M | 1,937,938 | 6.04% | 2q | +217.7%+$69.6M |
| CITADEL ADVISORS LLC | $99.1M | 1,645,101 | 0.01% | 31q | -26.6%-$35.9M |
| NORTHERN TRUST CORP | $96.0M | 1,831,619 | 0.01% | 31q | +7.9%+$7.0M |
| MORGAN STANLEY | $91.8M | 1,751,882 | 0.00% | 35q | +0.9%+$827.4K |
| RTW INVESTMENTS, LP | $87.6M | 1,672,356 | 0.75% | 12q | HELD |
| LOOMIS SAYLES & CO L P | $83.1M | 1,585,518 | 0.10% | 14q | -11.2%-$10.4M |
| Affinity Asset Advisors, LLC | $72.0M | 1,125,000 | 3.26% | 12q | -16.7%-$14.4M |
| ADAGE CAPITAL PARTNERS GP, L.L.C. | $71.7M | 1,368,000 | 0.10% | new | NEW |
| Public Sector Pension Investment Board | $71.0M | 1,354,810 | 0.09% | 11q | +100.0%+$35.5M |
| D. E. Shaw & Co., Inc. | $68.7M | 1,312,031 | 0.03% | 31q | +84.7%+$31.5M |
| Driehaus Capital Management LLC | $64.9M | 1,238,809 | 0.38% | 6q | +56.4%+$23.4M |
| VANGUARD FIDUCIARY TRUST CO | $61.7M | 1,177,945 | 0.01% | 2q | +4.3%+$2.6M |
| FRANKLIN RESOURCES INC | $61.3M | 1,170,242 | 0.01% | 20q | +541.1%+$51.8M |
| BNP PARIBAS ASSET MANAGEMENT Holding S.A. | $60.7M | 1,159,216 | 0.06% | 5q | +383.7%+$48.2M |
| FMR LLC | $59.4M | 1,134,410 | 0.00% | 19q | -14.3%-$9.9M |
| Bank of New York Mellon Corp | $57.5M | 1,097,282 | 0.01% | 31q | +5.9%+$3.2M |
| TWO SIGMA INVESTMENTS, LP | $54.4M | 1,038,311 | 0.04% | 21q | +33.0%+$13.5M |
| Soleus Capital Management, L.P. | $53.9M | 1,029,252 | 1.86% | 3q | -47.8%-$49.3M |
| PRINCIPAL FINANCIAL GROUP INC | $51.5M | 983,822 | 0.03% | 31q | +2.7%+$1.4M |
| MARSHALL WACE, LLP | $50.8M | 969,954 | 0.04% | 3q | -2.9%-$1.5M |
| SUMMIT PARTNERS PUBLIC ASSET MANAGEMENT, LLC | $49.8M | 950,234 | 0.88% | new | NEW |
| BANK OF AMERICA CORP /DE/ | $48.1M | 918,303 | 0.00% | 31q | -24.2%-$15.3M |
| VICTORY CAPITAL MANAGEMENT INC | $48.0M | 916,709 | 0.03% | 28q | +196.7%+$31.8M |
| Pictet Asset Management Holding SA | $44.0M | 838,026 | 0.04% | 12q | -11.1%-$5.5M |
| Artisan Partners Limited Partnership | $43.5M | 831,006 | 0.07% | 26q | -25.3%-$14.7M |
| PANAGORA ASSET MANAGEMENT INC | $40.1M | 765,543 | 0.12% | 31q | -17.9%-$8.8M |
| Palo Alto Investors LP | $38.1M | 727,680 | 1.76% | 23q | +200.0%+$25.4M |
| Frazier Life Sciences Management, L.P. | $36.7M | 700,647 | 0.80% | 8q | HELD |
| FRONTIER CAPITAL MANAGEMENT CO LLC | $34.6M | 659,562 | 0.32% | new | NEW |
| BNP PARIBAS FINANCIAL MARKETS | $34.3M | 655,140 | 0.01% | 31q | +24.1%+$6.7M |
| AMERIPRISE FINANCIAL INC | $33.0M | 630,325 | 0.01% | 27q | -57.5%-$44.6M |
| Woodline Partners LP | $29.4M | 560,282 | 0.09% | 12q | HELD |
| Spruce Street Capital LP | $28.5M | 543,876 | 5.59% | 2q | +71.0%+$11.8M |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | $28.0M | 52,448 | 0.00% | 18q | -7.7%-$2.3M |
| MetLife Investment Management, LLC | $26.9M | 512,924 | 0.12% | 21q | +477.3%+$22.2M |
| SEGALL BRYANT & HAMILL, LLC | $26.1M | 498,222 | 0.31% | 26q | -14.9%-$4.6M |
| Artia Global Partners LP | $23.5M | 448,964 | 4.34% | new | NEW |
| Invesco Ltd. | $23.2M | 443,107 | 0.00% | 31q | -15.5%-$4.3M |
| RAYMOND JAMES FINANCIAL INC | $22.2M | 422,761 | 0.01% | 7q | +33.2%+$5.5M |
| Fisher Asset Management, LLC | $22.0M | 419,102 | 0.01% | 31q | +7.3%+$1.5M |
| GENDELL JEFFREY L | $20.7M | 395,882 | 0.18% | 2q | +50.2%+$6.9M |
| Prosight Management, LP | $20.7M | 394,389 | 3.56% | 2q | -23.2%-$6.2M |
| Legal & General Group Plc | $20.6M | 393,524 | 0.00% | 31q | +3.4%+$670.8K |
| RICE HALL JAMES & ASSOCIATES, LLC | $20.5M | 390,866 | 1.00% | 11q | HELD |
| RHUMBLINE ADVISERS | $20.3M | 387,999 | 0.02% | 31q | -13.7%-$3.2M |
| GLENMEDE TRUST CO NA | $18.9M | 361,184 | 0.08% | 17q | -4.5%-$885.8K |
| California Public Employees Retirement System | $18.2M | 347,246 | 0.01% | 20q | +5.8%+$997.8K |
| MILLENNIUM MANAGEMENT LLC | $18.1M | 319,595 | 0.01% | new | NEW |
| NOMURA ASSET MANAGEMENT INTERNATIONAL INC. | $17.7M | 337,043 | 0.03% | 3q | -0.9%-$154.8K |
| Ensign Peak Advisors, Inc | $17.6M | 335,208 | 0.03% | 19q | +1699.1%+$16.6M |
| Swiss National Bank | $16.6M | 316,900 | 0.01% | 31q | +2.1%+$345.8K |
| UBS Group AG | $15.7M | 300,350 | 0.00% | 31q | -39.3%-$10.2M |
| Eagle Health Investments LP | $15.6M | 297,302 | 2.58% | 4q | +24.6%+$3.1M |
| JANE STREET GROUP, LLC | $15.1M | 9,990 | 0.00% | 15q | +75.3%+$6.5M |
| Senator Investment Group LP | $14.4M | 275,000 | 0.53% | 2q | +17.0%+$2.1M |
| JPMORGAN CHASE & CO | $14.2M | 262,721 | 0.00% | 18q | -93.6%-$207.4M |
| NEUBERGER BERMAN GROUP LLC | $13.6M | 260,208 | 0.01% | 13q | +31.9%+$3.3M |
| STEMPOINT CAPITAL LP | $13.0M | 248,015 | 2.24% | 2q | +54.1%+$4.6M |
| PEREGRINE CAPITAL MANAGEMENT LLC | $12.2M | 232,255 | 0.40% | 5q | -4.8%-$615.7K |
| Russell Investments Group, Ltd. | $11.7M | 222,624 | 0.01% | 31q | +125.5%+$6.5M |
| FEDERATED HERMES, INC. | $11.6M | 221,589 | 0.02% | 21q | +652.2%+$10.1M |
| BARCLAYS PLC | $11.5M | 219,935 | 0.00% | 31q | +25.7%+$2.4M |
| Amundi | $11.4M | 217,739 | 0.00% | 16q | +236.5%+$8.0M |
| Atika Capital Management LLC | $11.3M | 55,571 | 0.74% | new | NEW |
| Atle Fund Management AB | $11.2M | 213,329 | 3.01% | 9q | -12.0%-$1.5M |
| AQR CAPITAL MANAGEMENT LLC | $11.2M | 212,968 | 0.00% | 31q | -44.5%-$9.0M |
| Rock Springs Capital Management LP | $10.5M | 199,811 | 0.51% | 4q | +8.6%+$829.2K |
| WELLS FARGO & COMPANY/MN | $10.4M | 199,433 | 0.00% | 31q | -15.4%-$1.9M |
| Schonfeld Strategic Advisors LLC | $10.2M | 195,174 | 0.04% | 2q | +1076.9%+$9.4M |
| Aberdeen Group plc | $10.2M | 193,805 | 0.01% | new | NEW |
| DEUTSCHE BANK AG\ | $10.0M | 191,316 | 0.00% | 34q | +27.8%+$2.2M |
| Tetragon Partners GP Ltd | $10.0M | 189,979 | 1.57% | 5q | +18.9%+$1.6M |
| Rhenman & Partners Asset Management AB | $9.7M | 185,250 | 0.92% | 31q | +39.0%+$2.7M |
| CITIGROUP INC | $9.7M | 184,901 | 0.00% | 31q | +289.7%+$7.2M |
| HighVista Strategies LLC | $9.4M | 179,256 | 2.14% | 7q | +144.9%+$5.6M |
| MARTINGALE ASSET MANAGEMENT L P | $8.9M | 170,004 | 0.21% | 20q | -12.7%-$1.3M |
| VANGUARD ASSET MANAGEMENT, Ltd | $8.3M | 157,759 | 0.01% | 2q | +15.7%+$1.1M |
| Caption Management, LLC | $7.9M | 10,000 | 0.04% | new | NEW |
| ALLIANCEBERNSTEIN L.P. | $7.7M | 217,917 | 0.00% | 31q | -16.5%-$1.5M |
Showing the largest 100 of 425 reported holders.
Quarter by quarter
Coverage begins with the quarter ending 2018-12-31. Earlier filings exist only as occasional late amendments, too sparse to describe a market, so they are not shown.
| Quarter | Holders | Value | Shares | New | Added | Trimmed | Options |
|---|---|---|---|---|---|---|---|
| Q2 2026 | 395 | $9.1B | 171,682,453 | 89 | 133 | 116 | 1.2% |
| Q1 2026 | 360 | $6.0B | 169,058,380 | 67 | 104 | 132 | 0.4% |
| Q4 2025 | 334 | $4.8B | 169,030,173 | 43 | 126 | 111 | 0.6% |
| Q3 2025 | 323 | $4.9B | 161,080,935 | 39 | 126 | 119 | 0.8% |
| Q2 2025 | 319 | $4.5B | 156,829,637 | 37 | 134 | 108 | 0.6% |
| Q1 2025 | 333 | $5.1B | 155,418,281 | 55 | 105 | 125 | 0.4% |
| Q4 2024 | 305 | $4.3B | 149,454,022 | 36 | 98 | 104 | 0.2% |
| Q3 2024 | 296 | $4.5B | 161,420,503 | 45 | 95 | 104 | 0.1% |
| Q2 2024 | 286 | $4.0B | 166,508,675 | 39 | 111 | 93 | 0.2% |
| Q1 2024 | 296 | $4.4B | 162,925,246 | 50 | 92 | 101 | 0.6% |
| Q4 2023 | 270 | $4.7B | 167,585,209 | 38 | 106 | 69 | 0.3% |
| Q3 2023 | 273 | $4.3B | 151,647,231 | 45 | 120 | 66 | 0.8% |
| Q2 2023 | 263 | $4.7B | 150,324,396 | 44 | 91 | 80 | 0.6% |
| Q1 2023 | 236 | $4.2B | 146,449,989 | 33 | 79 | 73 | 1.1% |
| Q4 2022 | 224 | $3.7B | 137,274,857 | 35 | 80 | 62 | 2.9% |
| Q3 2022 | 271 | $3.6B | 160,185,891 | 36 | 114 | 69 | 0.8% |
| Q2 2022 | 274 | $4.7B | 157,193,531 | 60 | 77 | 85 | 0.4% |
| Q1 2022 | 240 | $4.2B | 158,146,323 | 50 | 60 | 89 | 0.4% |
| Q4 2021 | 216 | $3.7B | 156,396,910 | 30 | 71 | 72 | 0.9% |
| Q3 2021 | 221 | $4.7B | 152,436,283 | 39 | 68 | 72 | 0.7% |
| Q2 2021 | 223 | $4.0B | 161,201,547 | 63 | 66 | 60 | 1.3% |
| Q1 2021 | 191 | $3.0B | 157,803,819 | 24 | 60 | 60 | 1.4% |
| Q4 2020 | 204 | $3.3B | 161,652,628 | 38 | 62 | 62 | 1.0% |
| Q3 2020 | 177 | $2.8B | 164,892,457 | 29 | 51 | 53 | 0.8% |
| Q2 2020 | 164 | $3.1B | 159,488,228 | 20 | 59 | 49 | 0.7% |
| Q1 2020 | 187 | $2.3B | 155,940,412 | 28 | 64 | 56 | 0.3% |
| Q4 2019 | 212 | $3.1B | 152,747,735 | 38 | 72 | 63 | 0.5% |
| Q3 2019 | 198 | $2.9B | 150,738,346 | 25 | 65 | 65 | 0.2% |
| Q2 2019 | 218 | $3.5B | 152,972,820 | 38 | 84 | 48 | 0.4% |
| Q1 2019 | 221 | $5.6B | 153,873,957 | 25 | 72 | 61 | 0.3% |
| Q4 2018 | 234 | $4.6B | 155,365,681 | 4 | 6 | 6 | 0.3% |