Company · Ownership research

Alkermes plc. ALKS

CIK 0001520262 · CUSIP G01767105

Insider trading Initial holdings Institutional holders

Quarter-end disclosures, not live holdings.

Several CUSIPs are reported for this company; this page shows CUSIP G01767105 (ALKS), not CUSIP G01767905 (ALKS), CUSIP G01767955 (ALKS), and does not merge CUSIPs.

This page lists the top 20 of 367 rows by value; the complete set is available through the API.

Some filings reported values in thousands; those figures were scaled ×1,000 to dollars.

Top 20 institutions

Weight means this stock's share of the manager's own portfolio.

By reported value

#	Manager	Value	Manager weight	Change vs prior	Source
01	BlackRock, Inc. CIK 2012383 · View history	$791.06M 28,272,412 shares	0.01%	+300.33K(+1.10%)Added	SEC filing ↗ Feb 12, 2026	▾
02	VANGUARD GROUP INC CIK 102909 · View history	$503.85M 18,007,364 shares	0.01%	-172.15K(-0.90%)Reduced	SEC filing ↗ Jan 29, 2026	▾
03	BAKER BROS. ADVISORS LP CIK 1263508 · View history	$280.14M 10,012,267 shares	1.64%	+1.92M(+23.70%)Added	SEC filing ↗ Feb 17, 2026	▾
04	STATE STREET CORP CIK 93751 · View history	$265.05M 9,472,858 shares	0.01%	+932.51K(+10.90%)Added	SEC filing ↗ Feb 13, 2026	▾
05	PRICE T ROWE ASSOCIATES INC /MD/ CIK 80255 · View history	$251.79M 8,998,963 shares	0.03%	-1.24M(-12.10%)Reduced	SEC filing ↗ Feb 17, 2026	▾
06	RENAISSANCE TECHNOLOGIES LLC CIK 1037389 · View history	$186.57M 6,668,028 shares	0.29%	+375.50K(+6.00%)Added	SEC filing ↗ Feb 12, 2026	▾
07	AMERICAN CENTURY COMPANIES INC CIK 748054 · View history	$166.67M 5,956,824 shares	0.08%	+1.56M(+35.50%)Added	SEC filing ↗ Feb 13, 2026	▾
08	JPMORGAN CHASE & CO CIK 19617 · View history	$145.06M 5,184,547 shares	0.01%	+1.26M(+32.00%)Added	SEC filing ↗ Feb 11, 2026	▾
09	DIMENSIONAL FUND ADVISORS LP CIK 354204 · View history	$123.47M 4,412,783 shares	0.03%	+714.79K(+19.30%)Added	SEC filing ↗ Feb 12, 2026	▾
10	GEODE CAPITAL MANAGEMENT, LLC CIK 1214717 · View history	$114.20M 4,080,776 shares	0.01%	+19.38K(+0.50%)Added	SEC filing ↗ Feb 9, 2026	▾
11	COMMODORE CAPITAL LP CIK 1831942 · View history	$99.33M 3,550,000 shares	6.61%	+453.25K(+14.60%)Added	SEC filing ↗ Feb 17, 2026	▾
12	WELLINGTON MANAGEMENT GROUP LLP CIK 902219 · View history	$84.51M 3,020,442 shares	0.01%	+2.65M(+705.00%)Added	SEC filing ↗ Feb 17, 2026	▾
13	PRIMECAP MANAGEMENT CO/CA/ CIK 763212 · View history	$71.75M 2,564,300 shares	0.05%	-194.78K(-7.10%)Reduced	SEC filing ↗ Feb 11, 2026	▾
14	UBS Group AG CIK 1610520 · View history	$71.21M 2,544,895 shares	0.01%	+1.79M(+237.40%)Added	SEC filing ↗ Jan 29, 2026	▾
15	Nuveen, LLC CIK 1871926 · View history	$67.91M 2,427,028 shares	0.02%	+253.55K(+11.70%)Added	SEC filing ↗ Feb 12, 2026	▾
16	GOLDMAN SACHS GROUP INC CIK 886982 · Amended · View history	$63.45M 2,267,588 shares	0.01%	+272.64K(+13.70%)Added	SEC filing ↗ Mar 25, 2026	▾
17	CHARLES SCHWAB INVESTMENT MANAGEMENT INC CIK 884546 · View history	$60.23M 2,152,756 shares	0.01%	+12.38K(+0.60%)Added	SEC filing ↗ Feb 13, 2026	▾
18	Deep Track Capital, LP CIK 1856083 · View history	$55.96M 2,000,000 shares	1.28%	+2.00MNew	SEC filing ↗ Feb 13, 2026	▾
19	NORGES BANK CIK 1374170 · View history	$54.44M 1,945,734 shares	0.01%	+1.95MNew	SEC filing ↗ Feb 10, 2026	▾
20	LOOMIS SAYLES & CO L P CIK 312348 · View history	$53.23M 1,902,522 shares	0.06%	-146.33K(-7.10%)Reduced	SEC filing ↗ Feb 12, 2026	▾

Showing 20 / 367 institutions. The complete set is available through the API.

Coverage & totals by quarter

Reporting institutions

367

Cancelled or null records excluded

Disclosed shares

180,358,842

Not deduplicated across managers

Disclosed value

$5.05B

Not market cap or free float

Reporting institutions by quarter

Counts also change with data coverage and reporting entities; they do not measure net buying. Distinct managers with a live stock row in this CUSIP; totals may include overlapping filings and are not a share of the company.

Alkermes plc. · Q4 2025

Explore all 367 reporting institutions.

This page includes 20 of 367 reporting institutions. Log in to look up the full history beyond 3 years, use advanced screening & filtering, download CSV, and get the complete set through the Akkru API.

Download CSV
Earlier quarters
Advanced screening & filtering
API & AI access

Already have an account?

＋ New accounts get free API credits to explore data beyond ownership filings.

For AI agents & developers

The initial HTML of this page carries its exact data as script#research-data (JSON): values, units, scope, preview limits and SEC sources. Read it directly, no script or API key needed; script#research-access says what needs an account. This page lists 20 of 367 reporting institutions; totals use the complete disclosed data.

Without an account: the last 3 years, with the row caps stated on the page. A free account opens all history on file on these pages and the CSV of what a page shows. Rows beyond the caps and bulk retrieval go through the authenticated API / MCP / CLI.

MCP  https://api.akkrudata.ai/mcp

akkru_institutional_holdings
{"action":"holders","cusip":"G01767105","quarter":"2025Q4","type":"positions","page_size":100}

Connect to MCP with OAuth and follow the returned pagination. Credits and usage limits depend on the account.

MCP endpoint: https://api.akkrudata.ai/mcp
API / MCP / CLI documentation: /documents
llms.txt: /llms.txt

Sources, coverage & how to read this data

Figures are as reported to the SEC and merged with later amendments where Akkru could match them. Preview limits apply to what is listed, not to the totals, which come from the complete reported data. Nothing is zero-filled: a missing quarter or month is shown as missing.