Who owns ALKSWhat ALKS owns — n/a

Who owns Alkermes plc.?

Prices and market caps: Cboe delayed data, at least 15 minutes delayed. Not real-time. Fundamentals from company filings.

Institutional ownership of ALKS from SEC Form 13F filings across 504 reporting managers. All positions are from one synchronized reporting period — 2026-06-30 books, filed up to 45 days after quarter end — so every row is comparable.

As of the 2026-06-30 reporting period, 504 institutions disclosed 252.9M shares of Alkermes plc. worth $6.35B; the largest disclosed holder is BlackRock, Inc.. Source: SEC Form 13F filings, parsed by EvidInvest.

504

13F holders

$6.35B

value, 2026 filers

252.9M

shares disclosed

new positions (2026 filers)

Top institutional holders

ordered by shares owned · positions as of 2026-06-30 · % of fund = share of the manager's own book · % of co. = share of ALKS's shares outstanding

#	Manager	Shares	Value	% of fund	% of co.	Δ shares QoQ
1	BlackRock, Inc.	28.3M	$1.00B	0.0%	—	—
2	BlackRock Inc.	29.1M	$701.5M	0.0%	—	—
3	VANGUARD GROUP INC	18.0M	$503.8M	0.0%	—	—
4	BAKER BROS. ADVISORS LP	10.0M	$354.0M	2.0%	—	—
5	STATE STREET CORP	9.5M	$334.7M	0.0%	—	—
6	VANGUARD CAPITAL MANAGEMENT LLC	7.4M	$262.6M	0.0%	—	—
7	BlackRock Institutional Trust Company, N.A.	4.1M	$226.4M	0.0%	—	—
8	RENAISSANCE TECHNOLOGIES LLC	6.2M	$217.8M	0.3%	—	—
9	AMERICAN CENTURY COMPANIES INC	6.1M	$214.7M	0.1%	—	—
10	BlackRock Fund Advisors	3.7M	$206.7M	0.0%	—	—
11	PRICE T ROWE ASSOCIATES INC /MD/	4.7M	$164.9M	0.0%	—	—
12	DIMENSIONAL FUND ADVISORS LP	4.5M	$159.9M	0.0%	—	—
13	PICTET ASSET MANAGEMENT SA	4.8M	$150.1M	0.2%	—	—
14	COMMODORE CAPITAL LP	4.2M	$148.5M	8.6%	—	—
15	GEODE CAPITAL MANAGEMENT, LLC	4.2M	$147.9M	0.0%	—	—
16	Deep Track Capital, LP	3.6M	$127.0M	2.1%	—	—
17	JPMORGAN CHASE & CO	4.1M	$123.7M	0.0%	—	—
18	WELLINGTON MANAGEMENT GROUP LLP	3.0M	$105.0M	0.0%	—	—
19	FIRST TRUST ADVISORS LP	3.0M	$105.0M	0.1%	—	—
20	JANUS HENDERSON INVESTORS US LLC	1.7M	$97.0M	0.1%	—	—
21	PRIMECAP MANAGEMENT CO/CA/	2.5M	$89.8M	0.1%	—	—
22	Nuveen, LLC	2.5M	$87.0M	0.0%	—	—
23	Holocene Advisors, LP	2.3M	$81.9M	0.2%	—	—
24	CITADEL ADVISORS LLC	2.2M	$79.3M	0.0%	—	—
25	CHARLES SCHWAB INVESTMENT MANAGEMENT INC	2.2M	$79.1M	0.0%	—	—

Source: SEC Form 13F-HR filings (institutional managers over $100M in US-listed positions). 13Fs disclose long positions only, up to 45 days after quarter end; each manager's latest filed quarter is shown per row and dollar values are the manager's filed marks. Aggregates labeled "2026 filers" count only managers whose latest book is a 2026 quarter. Related: valuation · options positioning · supply chain. Research, not investment advice.