Alkermes plc. (ALKS) Institutional Ownership

Institutions by Trading Activity

168,510,000Shares Outstanding

174,862,554Shares held by institutions

$5,861,392,810Value of institutional holdings

103.77%Institutional ownership %

11.11%Shares Changed QoQ

355No. of institutional investors

Alkermes plc. (NASDAQ:ALKS) has 355 institutional investors that have filed 13F reports for the period ending December 2025.

Collectively, these holders controlled 101.6% of Alkermes's outstanding shares in December 2025, down from 103.6% in September 2025.
Their total shares held in ALKS increased 9.43% quarter over quarter, and separately, investors owning Alkermes increased 5.97% from a year ago.
Activity in ALKS broke down as 194 buyers, 124 sellers, and 37 unchanged among 355 total holders.
Combined, these investors held 171.15Mn shares in ALKS for December 2025, up by 14.75Mn shares quarter on quarter, and down 972.44K shares year over year.
As of December 31, 2025, Ares Financial Consulting, LLC held the largest stake in Alkermes with 26 shares, accounting for 0.0% of total shares outstanding.
Alkermes's 1 largest shareholders as of December 2025 include Ares Financial Consulting, LLC (26) per Business Quant data.

174,862,554 Total Shares Held

Rows:

Owner Name	Date	Shares Held	Change (QoQ)	Change (%)	Value (USD)
BlackRock, Inc.	31 Dec, 2025	28,272,412	300,334	1.07%	$791,062,090.00
VANGUARD GROUP INC	31 Dec, 2025	18,007,364	-172,147	-0.95%	$503,846,044.00
BAKER BROS. ADVISORS LP	31 Dec, 2025	10,012,267	1,920,916	23.74%	$280,143,231.00
State Street Corp	31 Dec, 2025	9,472,858	932,507	10.92%	$265,050,567.00
RENAISSANCE TECHNOLOGIES LLC	31 Dec, 2025	6,668,028	375,500	5.97%	$186,571,423.00
AMERICAN CENTURY COMPANIES INC	31 Dec, 2025	5,956,824	1,559,353	35.46%	$166,671,997.00
Jpmorgan Chase & Co	31 Dec, 2025	5,184,547	-2,671,793	-34.01%	$145,063,637.00
Goldman Sachs Group Inc	31 Dec, 2025	4,535,176	2,540,231	127.33%	$126,894,226.00
DIMENSIONAL FUND ADVISORS LP	31 Dec, 2025	4,412,783	714,787	19.33%	$123,466,744.00
GEODE CAPITAL MANAGEMENT, LLC	31 Dec, 2025	4,080,776	19,382	0.48%	$114,198,472.00
Commodore Capital LP	31 Dec, 2025	3,550,000	453,246	14.64%	$99,329,000.00
WELLINGTON MANAGEMENT GROUP LLP	31 Dec, 2025	3,020,442	2,645,252	705.04%	$84,511,968.00
Avoro Capital Advisors LLC	31 Dec, 2025	2,800,000	560,000	25.00%	$78,344,000.00
PRIMECAP MANAGEMENT CO/CA/	31 Dec, 2025	2,564,300	-194,780	-7.06%	$71,749,112.00
UBS Group AG	31 Dec, 2025	2,544,895	1,790,729	237.44%	$71,206,162.00
Nuveen, LLC	31 Dec, 2025	2,427,028	253,552	11.67%	$67,908,244.00
CHARLES SCHWAB INVESTMENT MANAGEMENT INC	31 Dec, 2025	2,152,756	12,383	0.58%	$60,234,113.00
Deep Track Capital, LP	31 Dec, 2025	2,000,000	2,000,000	0.00%	$55,960,000.00
NORGES BANK	31 Dec, 2025	1,945,734	1,945,734	0.00%	$54,441,637.00
LOOMIS SAYLES & CO L P	31 Dec, 2025	1,902,522	-146,329	-7.14%	$53,232,566.00

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