Alkermes plc.: which funds bought and sold
Institutions that bought and sold Alkermes shares in Q2 2026, from the holdings they reported to the SEC on Form 13F for March 31, 2026 and June 30, 2026.
Between March 31, 2026 and June 30, 2026, 221 institutions that filed 13F reports for both quarters added to or opened positions in Alkermes, and 188 cut or closed them. Together they sold a net 844K shares, −0.5% on what they held at the start of the quarter. Active managers and hedge funds on our list were net sellers of 203K shares (−0.3%); index fund managers were net buyers of 1.1M shares (+1.7%). 82 opened a new position and 51 sold out entirely.
Bought, Q2 2026 221 institutions, 82 of them new holders Sold, Q2 2026 188 institutions, 51 of them sold out
Net change, all compared −844K shares (−0.5%)
Net change, active managers −203K shares (−0.3%), 27 bought, 38 sold
Buyers versus sellers
221 bought 55 188 sold
Active managers and hedge funds 27 bought · 38 sold · −203K
Index fund managers 7 bought · 5 sold · +1.1M
Other institutions 187 bought · 145 sold · −1.7M
Biggest buyers
| Institution | Change in shares | Shares June 30, 2026 | Value |
|---|---|---|---|
| Price T Rowe Associates Inc Active manager | +2.1M +44.4% | 6.7M | $353M |
| Adage Capital Partners Gp, L.L.C. Hedge fund | +1.4M New position | 1.4M | $71.7M |
| Bain Capital Life Sciences Investors, LLC | +1.3M +217.7% | 1.9M | $102M |
| Holocene Advisors, LP Hedge fund | +1.3M +55.4% | 3.6M | $189M |
| Franklin Resources Inc Active manager | +988K +541.1% | 1.2M | $61.3M |
| Summit Partners Public Asset Management, LLC | +950K New position | 950K | $49.8M |
| Blackrock, Inc. Index funds | +921K +3.3% | 29.2M | $1.5B |
| BNP Paribas Asset Management Holding S.A. | +920K +383.7% | 1.2M | $60.7M |
| Frontier Capital Management Co LLC Active manager | +660K New position | 660K | $34.6M |
| Victory Capital Management Inc Active manager | +608K +196.7% | 917K | $48M |
| D. E. Shaw & Co., Inc. Hedge fund | +602K +84.7% | 1.3M | $68.7M |
| Artia Global Partners LP | +449K New position | 449K | $23.5M |
| Driehaus Capital Management LLC Active manager | +447K +56.4% | 1.2M | $64.9M |
| Metlife Investment Management, LLC | +424K +477.3% | 513K | $26.9M |
| Deep Track Capital, LP Hedge fund | +410K +11.4% | 4.0M | $210M |
| Ensign Peak Advisors, Inc | +326K +3498.2% | 335K | $17.6M |
| Millennium Management LLC Hedge fund | +320K New position | 320K | $16.7M |
| Renaissance Technologies LLC Hedge fund | +301K +4.9% | 6.5M | $339M |
| Geode Capital Management, LLC Index funds | +296K +7.1% | 4.5M | $235M |
| Gw&K Investment Management, LLC | +292K New position | 292K | $15.3M |
| Institution | Change in shares | Shares June 30, 2026 | Value |
|---|---|---|---|
| Price T Rowe Associates Inc Active manager | +2.1M +44.4% | 6.7M | $353M |
| Adage Capital Partners Gp, L.L.C. Hedge fund | +1.4M New position | 1.4M | $71.7M |
| Holocene Advisors, LP Hedge fund | +1.3M +55.4% | 3.6M | $189M |
| Franklin Resources Inc Active manager | +988K +541.1% | 1.2M | $61.3M |
| Frontier Capital Management Co LLC Active manager | +660K New position | 660K | $34.6M |
| Victory Capital Management Inc Active manager | +608K +196.7% | 917K | $48M |
| D. E. Shaw & Co., Inc. Hedge fund | +602K +84.7% | 1.3M | $68.7M |
| Driehaus Capital Management LLC Active manager | +447K +56.4% | 1.2M | $64.9M |
| Deep Track Capital, LP Hedge fund | +410K +11.4% | 4.0M | $210M |
| Millennium Management LLC Hedge fund | +320K New position | 320K | $16.7M |
Biggest sellers
| Institution | Change in shares | Shares June 30, 2026 | Value |
|---|---|---|---|
| Jpmorgan Chase & Co | −3.8M −93.6% | 263K | $14.2M |
| American Century Companies Inc Active manager | −2.1M −34.9% | 4.0M | $207M |
| Avoro Capital Advisors LLC Hedge fund | −1.2M Sold out | 0 | — |
| Commodore Capital LP Hedge fund | −1.2M −28.6% | 3.0M | $157M |
| Soleus Capital Management, L.P. Hedge fund | −942K −47.8% | 1.0M | $53.9M |
| Pacer Advisors, Inc. | −679K −98.6% | 9,519 | $499,000 |
| Citadel Advisors LLC Hedge fund | −596K −26.6% | 1.6M | $86.2M |
| First Trust Advisors LP | −548K −18.5% | 2.4M | $127M |
| Man Group PLC Hedge fund | −501K −80.2% | 124K | $6.5M |
| Balyasny Asset Management L.P. Hedge fund | −444K −75.7% | 142K | $7.5M |
| UBS Am, A Distinct Business Unit Of UBS Asset Management Americas LLC | −400K −99.3% | 2,712 | $142,095 |
| Logos Global Management LP Hedge fund | −350K Sold out | 0 | — |
| Silverarc Capital Management, LLC | −347K −75.3% | 113K | $5.9M |
| Dimensional Fund Advisors LP | −328K −7.2% | 4.2M | $220M |
| State Street Corp Index funds | −305K −3.2% | 9.2M | $480M |
| Bank Of America Corp | −293K −24.2% | 918K | $48.1M |
| Artisan Partners Limited Partnership Active manager | −281K −25.3% | 831K | $43.5M |
| Royal Bank Of Canada | −278K −91.3% | 27K | $1.4M |
| Virginia Retirement Systems Et Al | −267K −89.0% | 33K | $1.7M |
| Mackenzie Financial Corp | −240K −96.3% | 9,244 | $484,339 |
| Institution | Change in shares | Shares June 30, 2026 | Value |
|---|---|---|---|
| American Century Companies Inc Active manager | −2.1M −34.9% | 4.0M | $207M |
| Avoro Capital Advisors LLC Hedge fund | −1.2M Sold out | 0 | — |
| Commodore Capital LP Hedge fund | −1.2M −28.6% | 3.0M | $157M |
| Soleus Capital Management, L.P. Hedge fund | −942K −47.8% | 1.0M | $53.9M |
| Citadel Advisors LLC Hedge fund | −596K −26.6% | 1.6M | $86.2M |
| Man Group PLC Hedge fund | −501K −80.2% | 124K | $6.5M |
| Balyasny Asset Management L.P. Hedge fund | −444K −75.7% | 142K | $7.5M |
| Logos Global Management LP Hedge fund | −350K Sold out | 0 | — |
| Artisan Partners Limited Partnership Active manager | −281K −25.3% | 831K | $43.5M |
| Capital Fund Management S.A. Hedge fund | −210K −86.3% | 33K | $1.7M |
New positions
| Institution | Shares | Value June 30, 2026 |
|---|---|---|
| Adage Capital Partners Gp, L.L.C.Hedge fund | 1.4M | $71.7M |
| Summit Partners Public Asset Management, LLC | 950K | $49.8M |
| Frontier Capital Management Co LLCActive manager | 660K | $34.6M |
| Artia Global Partners LP | 449K | $23.5M |
| Millennium Management LLCHedge fund | 320K | $16.7M |
| Gw&K Investment Management, LLC | 292K | $15.3M |
| Aberdeen Group PLC | 194K | $10.2M |
| Cinctive Capital Management LPHedge fund | 139K | $7.3M |
| TD Asset Management Inc | 118K | $6.2M |
| Informed Momentum Co LLC | 111K | $5.8M |
Sold out
| Institution | Shares | Value March 31, 2026 |
|---|---|---|
| Avoro Capital Advisors LLCHedge fund | 1.2M | $42.4M |
| Logos Global Management LPHedge fund | 350K | $12.4M |
| Engineers Gate Manager LPHedge fund | 208K | $7.4M |
| Hudson Bay Capital Management LPHedge fund | 174K | $6.1M |
| Wedge Capital Management L L PActive manager | 151K | $5.3M |
| Alps Advisors Inc | 136K | $4.8M |
| Assenagon Asset Management S.A. | 122K | $4.3M |
| Krensavage Asset Management, LLC | 108K | $3.8M |
| Bridgewater Associates, LPHedge fund | 84K | $3M |
| HRT Financial LP | 82K | $2.9M |
Who holds the shares
- Institutions reporting
- 419
- Ten largest holders
- 51.4% of 13F-reported shares
- Index fund managers
- 37.0% of 13F-reported shares
- Active managers and hedge funds
- 37.2% of 13F-reported shares
| Type | Bought | Sold | New | Sold out | Net change in shares | Net % |
|---|---|---|---|---|---|---|
| Active managers and hedge funds | 27 | 38 | 9 | 11 | −203K | −0.3% |
| Index fund managers | 7 | 5 | 0 | 0 | +1.1M | +1.7% |
| Other institutions | 187 | 145 | 73 | 40 | −1.7M | −3.8% |