Alkermes plc.
ALKS- Exchange
- Nasdaq
- Industry
- Pharmaceutical Preparations
- SEC CIK
- 0001520262
In the last 90 days, Alkermes plc. insiders filed 0 open-market purchases and 8 sales; 425 institutions reported holding it in 13F filings for Q2 2026, worth $9.32B in total; no superinvestor holds it.
13F holders, Q1 2026
Institutional positions in Alkermes plc. as of Mar 31, 2026. Investment managers with $100 million or more in US stocks report their long positions on Form 13F within 45 days after each quarter ends. How 13F works
- Institutional holders
- 390
- +30 vs. Q4 2025
- Shares held
- 176.6M
- +16.2M (+10.1%) vs. Q4 2025
- Total value
- $6.22B
- +$1.73B (+38.5%) vs. Q4 2025
- New holders
- 76
- 121 more added
- Sold out
- 46
- 149 more reduced
6 institutions that held it in Q4 2025 haven't filed for Q1 2026 yet. Not filing isn't selling, so they aren't counted as sold out or in the changes above.
Compare with Q4 2025: new holders, sold out and not filed yet
Holders and value by quarter
Institutions reporting ALKS on Form 13F each quarter since Q1 2021, and the total value they reported. Values are as of each quarter end, so they also move with the share price.
| Quarter | Holders | Value |
|---|---|---|
| Q2 2026 | 425 | $9.32B |
| Q1 2026 | 390 | $6.22B |
| Q4 2025 | 366 | $5.05B |
| Q3 2025 | 358 | $5.09B |
| Q2 2025 | 353 | $4.84B |
| Q1 2025 | 371 | $5.69B |
| Q4 2024 | 343 | $4.81B |
| Q3 2024 | 338 | $5.01B |
| Q2 2024 | 323 | $4.32B |
| Q1 2024 | 337 | $4.77B |
| Q4 2023 | 302 | $4.87B |
| Q3 2023 | 309 | $4.59B |
| Q2 2023 | 293 | $5.03B |
| Q1 2023 | 269 | $4.56B |
| Q4 2022 | 279 | $4.24B |
| Q3 2022 | 275 | $3.57B |
| Q2 2022 | 276 | $4.67B |
| Q1 2022 | 249 | $4.21B |
| Q4 2021 | 219 | $3.68B |
| Q3 2021 | 227 | $4.77B |
| Q2 2021 | 226 | $3.95B |
| Q1 2021 | 200 | $2.95B |
Institutions, Q1 2026
Shares, value and share of portfolio for each institution holding Alkermes plc.; share changes are against Q4 2025.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| BlackRock, Inc. | 28,314,410 | $1.00B | 0.02% | +41,998+0.1% | Added |
| Baker Bros. Advisors LP | 10,012,267 | $354.0M | 2.03% | 00.0% | Unchanged |
| Vanguard Portfolio Management LLC | 9,511,112 | $336.3M | 0.02% | +9,511,112 | New |
| State Street Corp | 9,465,286 | $334.7M | 0.01% | −7,572−0.1% | Reduced |
| Vanguard Capital Management LLC | 7,427,397 | $262.6M | 0.01% | +7,427,397 | New |
| Renaissance Technologies LLC | 6,160,428 | $217.8M | 0.34% | −507,600−7.6% | Reduced |
| American Century Companies Inc | 6,072,103 | $214.7M | 0.11% | +115,279+1.9% | Added |
| Price T Rowe Associates Inc | 4,664,576 | $164.9M | 0.02% | −4,334,387−48.2% | Reduced |
| Dimensional Fund Advisors LP | 4,522,378 | $159.9M | 0.03% | +109,595+2.5% | Added |
| Commodore Capital LP | 4,200,000 | $148.5M | 8.59% | +650,000+18.3% | Added |
| Geode Capital Management, LLC | 4,182,267 | $147.9M | 0.01% | +101,491+2.5% | Added |
| Deep Track Capital, LP | 3,590,323 | $127.0M | 2.62% | +1,590,323+79.5% | Added |
| JPMorgan Chase & Co | 4,101,789 | $123.7M | 0.01% | −1,082,758−20.9% | Reduced |
| Wellington Management Group LLP | 2,970,166 | $105.0M | 0.02% | −50,276−1.7% | Reduced |
| First Trust Advisors LP | 2,968,785 | $105.0M | 0.08% | +1,514,783+104.2% | Added |
| Primecap Management Co | 2,539,990 | $89.8M | 0.07% | −24,310−0.9% | Reduced |
| Nuveen, LLC | 2,460,569 | $87.0M | 0.02% | +33,541+1.4% | Added |
| Holocene Advisors, LP | 2,317,326 | $81.9M | 0.20% | +2,317,326 | New |
| Citadel Advisors LLC | 2,241,584 | $79.3M | 0.06% | +1,043,316+87.1% | Added |
| Charles Schwab Investment Management Inc | 2,236,756 | $79.1M | 0.01% | +84,000+3.9% | Added |
| BVF Inc | 2,000,000 | $70.7M | 2.25% | +2,000,000 | New |
| Soleus Capital Management, L.P. | 1,970,864 | $69.7M | 2.82% | +648,500+49.0% | Added |
| Goldman Sachs Group Inc | 1,882,178 | $66.6M | 0.01% | −385,410−17.0% | Reduced |
| Loomis Sayles & Co L P | 1,784,581 | $63.1M | 0.08% | −117,941−6.2% | Reduced |
| Morgan Stanley | 1,736,091 | $61.4M | 0.00% | −152,396−8.1% | Reduced |
| Northern Trust Corp | 1,697,082 | $60.0M | 0.01% | +43,607+2.6% | Added |
| RTW Investments, LP | 1,672,356 | $59.1M | 0.59% | 00.0% | Unchanged |
| Affinity Asset Advisors, LLC | 1,350,000 | $47.7M | 2.80% | +350,000+35.0% | Added |
| FMR LLC | 1,323,747 | $46.8M | 0.00% | −31,506−2.3% | Reduced |
| Bank of America Corp | 1,210,851 | $42.8M | 0.00% | −122,254−9.2% | Reduced |
| Avoro Capital Advisors LLC | 1,200,000 | $42.4M | 0.42% | −200,000−14.3% | Reduced |
| Vanguard Fiduciary Trust Co | 1,129,236 | $39.9M | 0.01% | +1,129,236 | New |
| Artisan Partners Limited Partnership | 1,111,741 | $39.3M | 0.06% | −237,381−17.6% | Reduced |
| Bank of New York Mellon Corp | 1,036,460 | $36.6M | 0.01% | −37,627−3.5% | Reduced |
| Marshall Wace, LLP | 999,322 | $35.3M | 0.04% | +869,423+669.3% | Added |
| Principal Financial Group Inc | 958,016 | $33.9M | 0.02% | +10,393+1.1% | Added |
| Panagora Asset Management Inc | 932,942 | $33.0M | 0.12% | +3,978+0.4% | Added |
| T. Rowe Price Investment Management, Inc. | 894,276 | $31.6M | 0.02% | +892,177+42,504.9% | Added |
| Pictet Asset Management Holding SA | 942,184 | $30.2M | 0.03% | −535,030−36.2% | Reduced |
| Driehaus Capital Management LLC | 791,963 | $28.0M | 0.21% | −5,005−0.6% | Reduced |
| Two Sigma Investments, LP | 780,683 | $27.6M | 0.02% | −432,714−35.7% | Reduced |
| Ameriprise Financial Inc | 741,141 | $26.2M | 0.01% | +209,779+39.5% | Added |
| D. E. Shaw & Co., Inc. | 710,297 | $25.1M | 0.02% | −200,975−22.1% | Reduced |
| Frazier Life Sciences Management, L.P. | 700,647 | $24.8M | 0.64% | 00.0% | Unchanged |
| Pacer Advisors, Inc. | 688,563 | $24.3M | 0.07% | +13,689+2.0% | Added |
| Public Sector Pension Investment Board | 677,405 | $24.0M | 0.07% | +6,235+0.9% | Added |
| Man Group plc | 625,046 | $22.1M | 0.05% | +312,534+100.0% | Added |
| Bain Capital Life Sciences Investors, LLC | 610,000 | $21.6M | 1.95% | +610,000 | New |
| Balyasny Asset Management LLC | 586,775 | $20.7M | 0.04% | −92,858−13.7% | Reduced |
| Segall Bryant & Hamill, LLC | 585,769 | $20.7M | 0.30% | −29,523−4.8% | Reduced |
| Woodline Partners LP | 558,567 | $19.8M | 0.07% | 00.0% | Unchanged |
| BNP Paribas Arbitrage, SA | 527,967 | $18.7M | 0.01% | +97,637+22.7% | Added |
| Invesco Ltd. | 524,275 | $18.5M | 0.00% | −14,441−2.7% | Reduced |
| Prosight Management, LP | 513,632 | $18.2M | 2.98% | +513,632 | New |
| UBS Group AG | 495,023 | $17.5M | 0.00% | −2,049,872−80.5% | Reduced |
| Silverarc Capital Management, LLC | 460,314 | $16.3M | 1.92% | +460,314 | New |
| Rhumbline Advisers | 449,531 | $15.9M | 0.01% | +10,336+2.4% | Added |
| UBS Asset Management Americas Inc | 403,153 | $14.3M | 0.00% | +8,300+2.1% | Added |
| Fisher Asset Management, LLC | 390,479 | $13.8M | 0.00% | −140.0% | Reduced |
| Rice Hall James & Associates, LLC | 390,344 | $13.8M | 0.77% | +10,886+2.9% | Added |
| AQR Capital Management LLC | 383,977 | $13.6M | 0.01% | −130,347−25.3% | Reduced |
| Legal & General Group Plc | 380,722 | $13.5M | 0.00% | −48,775−11.4% | Reduced |
| Glenmede Trust Co NA | 378,090 | $13.4M | 0.07% | −34,830−8.4% | Reduced |
| Gendell Jeffrey L | 351,473 | $12.4M | 0.17% | +351,473 | New |
| Logos Global Management LP | 350,000 | $12.4M | 0.64% | +350,000 | New |
| Nomura Asset Management International Inc. | 339,998 | $12.0M | 0.02% | −21,389−5.9% | Reduced |
| California Public Employees Retirement System | 328,202 | $11.6M | 0.01% | +3,624+1.1% | Added |
| Spruce Street Capital LP | 317,992 | $11.2M | 2.70% | +317,992 | New |
| Swiss National Bank | 310,300 | $11.0M | 0.01% | +1,100+0.4% | Added |
| Victory Capital Management Inc | 308,929 | $10.9M | 0.01% | −93,649−23.3% | Reduced |
| Royal Bank of Canada | 304,337 | $10.8M | 0.00% | −21,159−6.5% | Reduced |
| Virginia Retirement Systems Et Al | 300,383 | $10.6M | 0.08% | −676,100−69.2% | Reduced |
| Raymond James Financial Inc | 317,434 | $9.98M | 0.00% | −10,771−3.3% | Reduced |
| Squarepoint Ops LLC | 277,619 | $9.82M | 0.02% | −818,227−74.7% | Reduced |
| C WorldWide Group Holding A/S | 250,000 | $8.84M | 0.19% | 00.0% | Unchanged |
| Mackenzie Financial Corp | 249,182 | $8.81M | 0.01% | +153,735+161.1% | Added |
| S&CO Inc | 244,760 | $8.65M | 0.54% | +43,000+21.3% | Added |
| Peregrine Capital Management LLC | 244,007 | $8.63M | 0.32% | −10,326−4.1% | Reduced |
| Capital Fund Management S.A. | 243,043 | $8.59M | 0.08% | +92,268+61.2% | Added |
| Palo Alto Investors LP | 242,560 | $8.58M | 1.31% | 00.0% | Unchanged |
| BNP PARIBAS ASSET MANAGEMENT Holding S.A. | 239,671 | $8.47M | 0.01% | −1,462−0.6% | Reduced |
| Eagle Health Investments LP | 238,673 | $8.44M | 1.77% | +156,873+191.8% | Added |
| Senator Investment Group LP | 235,000 | $8.32M | 0.38% | +235,000 | New |
| HealthInvest Partners AB | 242,473 | $8.24M | 2.66% | 00.0% | Unchanged |
| Acadian Asset Management LLC | 227,939 | $8.05M | 0.01% | −294,158−56.3% | Reduced |
| Robeco Institutional Asset Management B.V. | 220,521 | $7.80M | 0.01% | −65,149−22.8% | Reduced |
| Engineers Gate Manager LP | 208,497 | $7.37M | 0.09% | +160,766+336.8% | Added |
| Alliancebernstein L.P. | 260,935 | $7.30M | 0.00% | +45,081+20.9% | Added |
| ExodusPoint Capital Management, LP | 204,324 | $7.22M | 0.07% | +204,324 | New |
| Neuberger Berman Group LLC | 197,220 | $6.97M | 0.01% | +44,448+29.1% | Added |
| Martingale Asset Management L P | 194,766 | $6.89M | 0.17% | +24,499+14.4% | Added |
| Rock Springs Capital Management LP | 183,986 | $6.51M | 0.38% | +44,758+32.1% | Added |
| California State Teachers Retirement System | 183,795 | $6.50M | 0.01% | +35,002+23.5% | Added |
| Franklin Resources Inc | 182,535 | $6.45M | 0.00% | −10,272−5.3% | Reduced |
| SG Americas Securities, LLC | 178,993 | $6.33M | 0.01% | +143,121+399.0% | Added |
| Universal- Beteiligungs- und Servicegesellschaft mbH | 178,455 | $6.31M | 0.01% | −16,075−8.3% | Reduced |
| Barclays PLC | 174,983 | $6.19M | 0.00% | −390,050−69.0% | Reduced |
| Hudson Bay Capital Management LP | 173,626 | $6.14M | 0.04% | +173,626 | New |
| Rafferty Asset Management, LLC | 162,424 | $5.74M | 0.02% | −40,840−20.1% | Reduced |
| Polygon Management Ltd. | 159,791 | $5.65M | 1.11% | +18,619+13.2% | Added |