ALKERMES PLC (ALKS) Institutional Ownership Changes & 13F Activity
ALKERMES PLC (ALKS). Institutional ownership data tracks hedge funds, asset managers, and other institutional investors based on recent SEC Form 13F filings (Q2 2026). This page analyzes institutional buying and selling activity, new holdings, and sold-out positions in the latest reporting period. Notable filers include Price T Rowe Associates Inc, Adage Capital Partners Gp, L.L.C., Bain Capital Life Sciences Investors, Llc, Holocene Advisors, Lp, and Commodore Capital Lp.
| Institution | Type | Change in shares | Change Position % | Shares | Reported stock balance | Portfolio quarter | Filing date |
|---|---|---|---|---|---|---|---|
| Manufacturers Life Insurance Company, The | Buy | +49,147 | +68.8% | 120,562 | $6.32M | Q2 2026 | Sep 09, 2026 |
| Parkside Financial Bank & Trust | Buy | +20 | +18.7% | 127 | $6.66K | Q2 2026 | Sep 04, 2026 |
| Citadel Advisors Llc | Sell | -596,483 | -26.6% | 1,645,101 | $86.20M | Q2 2026 | Sep 02, 2026 |
| Allianz Asset Management Gmbh | Buy | +11,348 | +14.1% | 91,708 | $4.81M | Q2 2026 | Sep 02, 2026 |
| Corient Private Wealth Llc | Sell | -2,312 | -20.0% | 9,234 | $483.82K | Q2 2026 | Aug 27, 2026 |
| California State Teachers Retirement System | Buy | +13,617 | +7.4% | 197,412 | $10.34M | Q2 2026 | Aug 24, 2026 |
| Mercer Global Advisors Inc | Buy | +633 | +7.1% | 9,567 | $501.28K | Q2 2026 | Aug 19, 2026 |
| Seven Fleet Capital Management Lp | Sell | -885 | -3.7% | 23,285 | $1.22M | Q2 2026 | Aug 17, 2026 |
| Public Employees Retirement System Of Ohio | Buy | +159 | +3.2% | 5,088 | $266.59K | Q2 2026 | Aug 17, 2026 |
| Centaurus Financial, Inc. | Sell | -152 | -2.5% | 5,811 | $304.00K | Q2 2026 | Aug 17, 2026 |
| Transamerica Financial Advisors, Llc | Buy | +14 | +1400.0% | 15 | $785.00 | Q2 2026 | Aug 17, 2026 |
| Empowered Funds, Llc | Buy | +4 | +0.1% | 7,821 | $409.78K | Q2 2026 | Aug 17, 2026 |
| Price T Rowe Associates Inc | Buy | +2,072,752 | +44.4% | 6,737,328 | $353.00M | Q2 2026 | Aug 14, 2026 |
| Adage Capital Partners Gp, L.L.C. | Buy | +1,368,000 | — | 1,368,000 | $71.68M | Q2 2026 | Aug 14, 2026 |
| Bain Capital Life Sciences Investors, Llc | Buy | +1,327,938 | +217.7% | 1,937,938 | $101.54M | Q2 2026 | Aug 14, 2026 |
| Holocene Advisors, Lp | Buy | +1,284,146 | +55.4% | 3,601,472 | $188.70M | Q2 2026 | Aug 14, 2026 |
| Commodore Capital Lp | Sell | -1,200,000 | -28.6% | 3,000,000 | $157.19M | Q2 2026 | Aug 14, 2026 |
| Summit Partners Public Asset Management, Llc | Buy | +950,234 | — | 950,234 | $49.79M | Q2 2026 | Aug 14, 2026 |
| Frontier Capital Management Co Llc | Buy | +659,562 | — | 659,562 | $34.56M | Q2 2026 | Aug 14, 2026 |
| Ameriprise Financial Inc | Buy | +630,325 | — | 630,325 | $33.03M | Q2 2026 | Aug 14, 2026 |
| D. E. Shaw & Co., Inc. | Buy | +601,734 | +84.7% | 1,312,031 | $68.74M | Q2 2026 | Aug 14, 2026 |
| Man Group Plc | Sell | -501,008 | -80.2% | 124,038 | $6.50M | Q2 2026 | Aug 14, 2026 |
| Artia Global Partners Lp | Buy | +448,964 | — | 448,964 | $23.52M | Q2 2026 | Aug 14, 2026 |
| Driehaus Capital Management Llc | Buy | +446,846 | +56.4% | 1,238,809 | $64.91M | Q2 2026 | Aug 14, 2026 |
| Balyasny Asset Management L.P. | Sell | -444,409 | -75.7% | 142,366 | $7.46M | Q2 2026 | Aug 14, 2026 |
| Invesco Ltd. | Buy | +443,107 | — | 443,107 | $23.22M | Q2 2026 | Aug 14, 2026 |
| Metlife Investment Management, Llc | Buy | +424,072 | +477.3% | 512,924 | $26.87M | Q2 2026 | Aug 14, 2026 |
| Deep Track Capital, Lp | Buy | +409,677 | +11.4% | 4,000,000 | $209.58M | Q2 2026 | Aug 14, 2026 |
| Ensign Peak Advisors, Inc | Buy | +325,892 | +3498.2% | 335,208 | $17.56M | Q2 2026 | Aug 14, 2026 |
| Millennium Management Llc | Buy | +319,595 | — | 319,595 | $16.75M | Q2 2026 | Aug 14, 2026 |
Frequently asked questions about ALKS activity
Which institutional owners are buying ALKS?
Institutional owners buying ALKS include investors who have either initiated new positions or increased their existing holdings based on recent SEC 13F filings. The activity table above highlights which funds added shares in the latest reporting periods and how their positions changed over time.
What does "buy" mean in ALKS activity?
"Buy" means an investor increased their reported position in ALKS compared to the prior reporting period. This reflects growing exposure to ALKERMES PLC (ALKS) rather than necessarily a brand-new position (though new positions also appear as buys when prior quantity was zero).
Is institutional interest in ALKS increasing?
Institutional interest in ALKS can be assessed by comparing the number of tracked funds adding or increasing positions versus those trimming or exiting across the periods shown. A higher number of additions typically signals increasing participation among large filers, but it should be read alongside position sizes and the full table.
Related ALKS Institutional Insights
- ALKS Overview
- ALKS 13F Institutional Holders
- ALKS Top Institutional Shareholders
- Healthcare Sector Institutional Ownership
- Healthcare Sector Portfolio Overlap
- Institutional Portfolio Overlap & Shared Holdings
- Most Bought Healthcare Stocks By Institutional Investors
- Most Sold Healthcare Stocks By Institutional Investors
- ALKS Insider Trading & SEC Form 4 Activity
- ALKS Articles
- Top Institutional Investor Stock Rankings