Alkermes plc. (ALKS) Institutional Ownership

Institutions by Trading Activity

Ownership Statistics

0Shares Outstanding

2,229,350Shares held by institutions

$67,192,609Value of institutional holdings

100.53%Institutional ownership %

-1.36%Shares Changed QoQ

348No. of institutional investors

Shares Owned by Institutions

Shares Purchased/Sold by Institutions

Ownership Summary

Alkermes plc. (NASDAQ:ALKS) showed up in the 13F filings of 355 institutional investors as of December 2025.

They owned 101.6% of outstanding stock in December 2025, down from 103.6% the prior quarter.
Their total shares held in ALKS increased 9.43% quarter over quarter, and separately, investors owning Alkermes increased 5.97% from a year ago.
Of these 355 funds, 194 grew their exposure to Alkermes, 124 cut back, and 37 maintained positions.
Altogether, these fund groups held 171.15Mn shares in ALKS by December 2025, up by 14.75Mn shares quarter on quarter, and down 972.44K shares year over year.
BlackRock, Inc. leads ownership in ALKS with 28.27Mn shares as of December 31, 2025, equal to 16.78% of outstanding shares.
Top purchasers of ALKS stock for the quarter ending December 2025 included WELLINGTON MANAGEMENT GROUP LLP (2.65Mn), Deep Track Capital, LP (2.0Mn), NORGES BANK (1.95Mn), BAKER BROS. ADVISORS LP (1.92Mn), UBS Group AG (1.79Mn).
Leading sellers of Alkermes shares for the quarter ending December 2025 were Jpmorgan Chase & Co (2.67Mn), Bank Of America Corp /De/ (859.8K), Avoro Capital Advisors LLC (840.0K), Artisan Partners Limited Partnership (760.65K), Man Group plc (584.76K).
Per Business Quant data, the top 10 holders of Alkermes for the quarter ending December 2025 are BlackRock, Inc. (28.27Mn), VANGUARD GROUP INC (18.01Mn), BAKER BROS. ADVISORS LP (10.01Mn), State Street Corp (9.47Mn), RENAISSANCE TECHNOLOGIES LLC (6.67Mn), AMERICAN CENTURY COMPANIES INC (5.96Mn), Jpmorgan Chase & Co (5.18Mn), DIMENSIONAL FUND ADVISORS LP (4.41Mn), GEODE CAPITAL MANAGEMENT, LLC (4.08Mn), Commodore Capital LP (3.55Mn).

355 Institutional Holders

2,229,350 Total Shares Held

Rows:

Download Data

Owner Name	Date	Change (QoQ)	Change (%)	Value (USD)
BlackRock, Inc.	31 Dec, 2025	300,334	1.07%	$0.00
VANGUARD GROUP INC	31 Dec, 2025	-172,147	-0.95%	$0.00
Commodore Capital LP	31 Dec, 2025	453,246	14.64%	$0.00
Avoro Capital Advisors LLC	31 Dec, 2025	560,000	25.00%	$0.00
BAKER BROS. ADVISORS LP	31 Dec, 2025	1,920,916	23.74%	$0.00
UBS Group AG	31 Dec, 2025	1,790,729	237.44%	$0.00
Barclays Plc	31 Dec, 2025	-415,549	-42.38%	$0.00
State Street Corp	31 Dec, 2025	932,507	10.92%	$0.00
Nuveen, LLC	31 Dec, 2025	253,552	11.67%	$0.00
HSBC HOLDINGS PLC	31 Dec, 2025	50,086	140.90%	$0.00
RENAISSANCE TECHNOLOGIES LLC	31 Dec, 2025	375,500	5.97%	$0.00
Deep Track Capital, LP	31 Dec, 2025	2,000,000	0.00%	$0.00
Rockefeller Capital Management L.P.	31 Dec, 2025	665	30.83%	$0.00
AMERICAN CENTURY COMPANIES INC	31 Dec, 2025	1,559,353	35.46%	$0.00
Pictet Asset Management Holding SA	31 Dec, 2025	584,168	65.41%	$0.00
Jpmorgan Chase & Co	31 Dec, 2025	-2,671,793	-34.01%	$0.00
DIMENSIONAL FUND ADVISORS LP	31 Dec, 2025	714,787	19.33%	$0.00
Soleus Capital Management, L.P.	31 Dec, 2025	1,322,364	0.00%	$0.00
GEODE CAPITAL MANAGEMENT, LLC	31 Dec, 2025	19,382	0.48%	$0.00
Squarepoint Ops LLC	31 Dec, 2025	650,540	146.09%	$0.00

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