ALKS Alkermes plc
Alkermes plc (ALKS) Institutional Ownership
What the institutions did with ALKS last quarter, from their 13F filings. Counting managers rather than shares is the point: a single index fund adding to a position tells you far less than four hundred separate managers all deciding to. Positions as reported for the quarter ended June 30, 2026.
Every manager below opens. Subscribers can see any firm's whole portfolio — every position, its weight, and what they bought, trimmed and exited last quarter.
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Each block is one manager, sized by shares held and colored by how much they moved the position last quarter. Green added, red cut, grey stood pat.
Largest holders
| Manager | Shares | % of reported |
|---|---|---|
| BlackRock, Inc. | 29.2M | 16.4% |
| BAKER BROS. ADVISORS LP | 10.0M | 5.6% |
| VANGUARD PORTFOLIO MANAGEMENT LLC | 9.5M | 5.3% |
| STATE STREET CORP | 9.2M | 5.1% |
| VANGUARD CAPITAL MANAGEMENT LLC | 7.5M | 4.2% |
| PRICE T ROWE ASSOCIATES INC /MD/ | 6.7M | 3.8% |
| RENAISSANCE TECHNOLOGIES LLC | 6.5M | 3.6% |
| GEODE CAPITAL MANAGEMENT, LLC | 4.5M | 2.5% |
| DIMENSIONAL FUND ADVISORS LP | 4.2M | 2.4% |
| Deep Track Capital, LP | 4.0M | 2.2% |
| AMERICAN CENTURY COMPANIES INC | 4.0M | 2.2% |
| Holocene Advisors, LP | 3.6M | 2.0% |
| Commodore Capital LP | 3.0M | 1.7% |
| WELLINGTON MANAGEMENT GROUP LLP | 2.8M | 1.6% |
| PRIMECAP MANAGEMENT CO/CA/ | 2.5M | 1.4% |
| FIRST TRUST ADVISORS LP | 2.4M | 1.4% |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC | 2.3M | 1.3% |
| Nuveen, LLC | 2.3M | 1.3% |
| NORGES BANK | 2.2M | 1.2% |
| BVF INC/IL | 2.2M | 1.2% |
| GOLDMAN SACHS GROUP INC | 2.0M | 1.1% |
| Bain Capital Life Sciences Investors, LLC | 1.9M | 1.1% |
| NORTHERN TRUST CORP | 1.8M | 1.0% |
| MORGAN STANLEY | 1.8M | 1.0% |
| RTW INVESTMENTS, LP | 1.7M | 0.9% |
Largest changes
| Manager | Action | Previous | Current | Change |
|---|---|---|---|---|
| JPMORGAN CHASE & CO | Reduced | 4.1M | 262.7K | -3.8M |
| AMERICAN CENTURY COMPANIES INC | Reduced | 6.1M | 4.0M | -2.1M |
| PRICE T ROWE ASSOCIATES INC /MD/ | Increased | 4.7M | 6.7M | +2.1M |
| ADAGE CAPITAL PARTNERS GP, L.L.C. | New | 0 | 1.4M | +1.4M |
| Bain Capital Life Sciences Investors, LLC | Increased | 610.0K | 1.9M | +1.3M |
| Holocene Advisors, LP | Increased | 2.3M | 3.6M | +1.3M |
| Commodore Capital LP | Reduced | 4.2M | 3.0M | -1.2M |
| Avoro Capital Advisors LLC | Sold Out | 1.2M | 0 | -1.2M |
| FRANKLIN RESOURCES INC | Increased | 182.5K | 1.2M | +987.7K |
| SUMMIT PARTNERS PUBLIC ASSET MANAGEMENT, LLC | New | 0 | 950.2K | +950.2K |
| Soleus Capital Management, L.P. | Reduced | 2.0M | 1.0M | -941.6K |
| BlackRock, Inc. | Increased | 28.3M | 29.2M | +921.3K |
| BNP PARIBAS ASSET MANAGEMENT Holding S.A. | Increased | 239.7K | 1.2M | +919.5K |
| Pacer Advisors, Inc. | Reduced | 688.6K | 9.5K | -679.0K |
| FRONTIER CAPITAL MANAGEMENT CO LLC | New | 0 | 659.6K | +659.6K |
| VICTORY CAPITAL MANAGEMENT INC | Increased | 308.9K | 916.7K | +607.8K |
| D. E. Shaw & Co., Inc. | Increased | 710.3K | 1.3M | +601.7K |
| CITADEL ADVISORS LLC | Reduced | 2.2M | 1.6M | -596.5K |
| FIRST TRUST ADVISORS LP | Reduced | 3.0M | 2.4M | -547.8K |
| Man Group plc | Reduced | 625.0K | 124.0K | -501.0K |
| Artia Global Partners LP | New | 0 | 449.0K | +449.0K |
| Driehaus Capital Management LLC | Increased | 792.0K | 1.2M | +446.8K |
| Balyasny Asset Management L.P. | Reduced | 586.8K | 142.4K | -444.4K |
| MetLife Investment Management, LLC | Increased | 88.9K | 512.9K | +424.1K |
| Deep Track Capital, LP | Increased | 3.6M | 4.0M | +409.7K |
| UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC | Reduced | 403.2K | 2.7K | -400.4K |
| Logos Global Management LP | Sold Out | 350.0K | 0 | -350.0K |
| SILVERARC CAPITAL MANAGEMENT, LLC | Reduced | 460.3K | 113.5K | -346.8K |
| DIMENSIONAL FUND ADVISORS LP | Reduced | 4.5M | 4.2M | -327.5K |
| Ensign Peak Advisors, Inc | Increased | 9.3K | 335.2K | +325.9K |
| MILLENNIUM MANAGEMENT LLC | New | 0 | 319.6K | +319.6K |
| STATE STREET CORP | Reduced | 9.5M | 9.2M | -304.7K |
| RENAISSANCE TECHNOLOGIES LLC | Increased | 6.2M | 6.5M | +300.5K |
| GEODE CAPITAL MANAGEMENT, LLC | Increased | 4.2M | 4.5M | +295.6K |
| BANK OF AMERICA CORP /DE/ | Reduced | 1.2M | 918.3K | -292.5K |
| GW&K Investment Management, LLC | New | 0 | 292.4K | +292.4K |
| Artisan Partners Limited Partnership | Reduced | 1.1M | 831.0K | -280.7K |
| ROYAL BANK OF CANADA | Reduced | 304.3K | 26.6K | -277.8K |
| TWO SIGMA INVESTMENTS, LP | Increased | 780.7K | 1.0M | +257.6K |
| MACKENZIE FINANCIAL CORP | Reduced | 249.2K | 9.2K | -239.9K |
| Spruce Street Capital LP | Increased | 318.0K | 543.9K | +225.9K |
| Affinity Asset Advisors, LLC | Reduced | 1.4M | 1.1M | -225.0K |
| CAPITAL FUND MANAGEMENT S.A. | Reduced | 243.0K | 33.3K | -209.8K |
| Engineers Gate Manager LP | Sold Out | 208.5K | 0 | -208.5K |
| LOOMIS SAYLES & CO L P | Reduced | 1.8M | 1.6M | -199.1K |
| T. Rowe Price Investment Management, Inc. | Increased | 894.3K | 1.1M | +196.7K |
| UBS Group AG | Reduced | 495.0K | 300.4K | -194.7K |
| Aberdeen Group plc | New | 0 | 193.8K | +193.8K |
| FEDERATED HERMES, INC. | Increased | 29.5K | 221.6K | +192.1K |
| FMR LLC | Reduced | 1.3M | 1.1M | -189.3K |
| Schonfeld Strategic Advisors LLC | Increased | 16.6K | 195.2K | +178.6K |
| Hudson Bay Capital Management LP | Sold Out | 173.6K | 0 | -173.6K |
| ExodusPoint Capital Management, LP | Reduced | 204.3K | 31.7K | -172.6K |
| AQR CAPITAL MANAGEMENT LLC | Reduced | 384.0K | 213.0K | -171.0K |
| PANAGORA ASSET MANAGEMENT INC | Reduced | 932.9K | 765.5K | -167.4K |
| Squarepoint Ops LLC | Reduced | 277.6K | 115.2K | -162.4K |
| ACADIAN ASSET MANAGEMENT LLC | Reduced | 227.9K | 67.3K | -160.7K |
| WELLINGTON MANAGEMENT GROUP LLP | Reduced | 3.0M | 2.8M | -155.4K |
| BVF INC/IL | Increased | 2.0M | 2.2M | +154.7K |
| Amundi | Increased | 64.7K | 217.7K | +153.0K |
13F filings are due 45 days after quarter end and cover long positions in U.S.-listed equities only, so this is a lagged and partial picture: shorts, bonds and foreign listings never appear. Options positions are excluded here rather than folded into the share counts. Political ownership is coming.