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.

InstitutionTypeChange in sharesChange Position %SharesReported stock balancePortfolio quarterFiling date
Manufacturers Life Insurance Company, TheBuy+49,147+68.8%120,562$6.32MQ2 2026Sep 09, 2026
Parkside Financial Bank & TrustBuy+20+18.7%127$6.66KQ2 2026Sep 04, 2026
Citadel Advisors LlcSell-596,483-26.6%1,645,101$86.20MQ2 2026Sep 02, 2026
Allianz Asset Management GmbhBuy+11,348+14.1%91,708$4.81MQ2 2026Sep 02, 2026
Corient Private Wealth LlcSell-2,312-20.0%9,234$483.82KQ2 2026Aug 27, 2026
California State Teachers Retirement SystemBuy+13,617+7.4%197,412$10.34MQ2 2026Aug 24, 2026
Mercer Global Advisors IncBuy+633+7.1%9,567$501.28KQ2 2026Aug 19, 2026
Seven Fleet Capital Management LpSell-885-3.7%23,285$1.22MQ2 2026Aug 17, 2026
Public Employees Retirement System Of OhioBuy+159+3.2%5,088$266.59KQ2 2026Aug 17, 2026
Centaurus Financial, Inc.Sell-152-2.5%5,811$304.00KQ2 2026Aug 17, 2026
Transamerica Financial Advisors, LlcBuy+14+1400.0%15$785.00Q2 2026Aug 17, 2026
Empowered Funds, LlcBuy+4+0.1%7,821$409.78KQ2 2026Aug 17, 2026
Price T Rowe Associates IncBuy+2,072,752+44.4%6,737,328$353.00MQ2 2026Aug 14, 2026
Adage Capital Partners Gp, L.L.C.Buy+1,368,0001,368,000$71.68MQ2 2026Aug 14, 2026
Bain Capital Life Sciences Investors, LlcBuy+1,327,938+217.7%1,937,938$101.54MQ2 2026Aug 14, 2026
Holocene Advisors, LpBuy+1,284,146+55.4%3,601,472$188.70MQ2 2026Aug 14, 2026
Commodore Capital LpSell-1,200,000-28.6%3,000,000$157.19MQ2 2026Aug 14, 2026
Summit Partners Public Asset Management, LlcBuy+950,234950,234$49.79MQ2 2026Aug 14, 2026
Frontier Capital Management Co LlcBuy+659,562659,562$34.56MQ2 2026Aug 14, 2026
Ameriprise Financial IncBuy+630,325630,325$33.03MQ2 2026Aug 14, 2026
D. E. Shaw & Co., Inc.Buy+601,734+84.7%1,312,031$68.74MQ2 2026Aug 14, 2026
Man Group PlcSell-501,008-80.2%124,038$6.50MQ2 2026Aug 14, 2026
Artia Global Partners LpBuy+448,964448,964$23.52MQ2 2026Aug 14, 2026
Driehaus Capital Management LlcBuy+446,846+56.4%1,238,809$64.91MQ2 2026Aug 14, 2026
Balyasny Asset Management L.P.Sell-444,409-75.7%142,366$7.46MQ2 2026Aug 14, 2026
Invesco Ltd.Buy+443,107443,107$23.22MQ2 2026Aug 14, 2026
Metlife Investment Management, LlcBuy+424,072+477.3%512,924$26.87MQ2 2026Aug 14, 2026
Deep Track Capital, LpBuy+409,677+11.4%4,000,000$209.58MQ2 2026Aug 14, 2026
Ensign Peak Advisors, IncBuy+325,892+3498.2%335,208$17.56MQ2 2026Aug 14, 2026
Millennium Management LlcBuy+319,595319,595$16.75MQ2 2026Aug 14, 2026
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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.