Alkermes ALKS Institutional Ownership

NASDAQ ALKS

$44.26 +1.29 (+3.01%)

As of: Oct 20, 2026 · 1:46 PM EDT

Institutions by Trading Activity

420 Institutions

Increased 232 55.2%

Unchanged 56 13.3%

Reduced 132 31.4%

Ownership Statistics

13F · as of 30 Jun, 2026

Institutional Ownership

—

13F totals exceed reported shares outstanding

Shares Held by Institutions

177.37Mn

of 167.54Mn outstanding

▲+1.37% QoQ

Shares Outstanding

167.54Mn

Institutional Investors

420

filed 13F for Jun 2026

▲+36 vs prior quarter

Net Shares Added (QoQ)

+2.39Mn

accumulated since last quarter

Value of Holdings

$7.11Bn

reported market value

Shares Owned by Institutions

Shares held % of outstanding

Latest —

Average ownership —

Peak ownership —

Shares Purchased/Sold by Institutions

Accumulated Distributed

Latest quarter —

Net over range —

Accumulating quarters —

Ownership Summary

Updated Oct 11, 2026

Alkermes plc. (NASDAQ:ALKS) was reported as a holding by 420 institutional investors in 13F filings for the quarter ended June 30, 2026.

Total shares held in Alkermes rose 1.37% from Q1 2026, while the number of holders rose 20.69% from Q2 2025.
Looking at the 420 holders of ALKS individually, 232 added to their positions, 132 reduced their stakes and 56 left their positions unchanged.
Institutional investors held 177.37Mn shares of Alkermes in total at the end of Q2 2026, up 2.39Mn from the prior quarter and up 10.21Mn from a year earlier.
BlackRock, Inc. was the top holder of Alkermes as of June 30, 2026, with 29.24Mn shares.
Holders that added the most shares of Alkermes in Q2 2026 were T. Rowe Price Associates Inc (+2.07Mn shares), Bain Capital Life Sciences Investors, LLC (+1.33Mn shares), Holocene Advisors, LP (+1.28Mn shares), Franklin Templeton Inc (+987.71K shares) and BlackRock, Inc. (+921.33K shares).
The biggest cuts to ALKS positions during Q2 2026 came from JPMorgan Chase & Co (-3.84Mn shares), American Century Companies Inc (-2.12Mn shares), Commodore Capital LP (-1.2Mn shares), Soleus Capital Management, L.P. (-941.61K shares) and Citadel Advisors LLC (-596.48K shares).
Business Quant data shows the 10 biggest positions in Alkermes as of Q2 2026 were held by BlackRock, Inc. (29.24Mn shares), Baker Bros. Advisors LP (10.01Mn shares), Vanguard Portfolio Management LLC (9.49Mn shares), State Street Corp (9.16Mn shares), Vanguard Capital Management LLC (7.52Mn shares), T. Rowe Price Associates Inc (6.74Mn shares), Renaissance Technologies LLC (6.46Mn shares), Geode Capital Management, LLC (4.48Mn shares), Dimensional Fund Advisors LP (4.19Mn shares) and Deep Track Capital, LP (4Mn shares).

Form 13F Holdings

421 Institutional Holders

Report period 30 Jun, 2026

Total shares held 177.37Mn

Of outstanding —

#	Institution	CIK	Shares Held	% of Outstanding	Change (QoQ)	Change (%)	Value (USD)
1	BlackRock, Inc.	0002012383	29,235,739	17.45%	▲921,329	+3.25%	$1.53Bn
2	BAKER BROS. ADVISORS LP	0001263508	10,012,267	5.98%	0	0.00%	$524.59Mn
3	VANGUARD PORTFOLIO MANAGEMENT LLC	0002100121	9,490,818	5.66%	▼20,294	-0.21%	$497.27Mn
4	State Street Corp	0000093751	9,160,575	5.47%	▼304,711	-3.22%	$479.97Mn
5	VANGUARD CAPITAL MANAGEMENT LLC	0002100119	7,515,025	4.49%	▲87,628	+1.18%	$393.75Mn
6	PRICE T ROWE ASSOCIATES INC /MD/	0000080255	6,737,328	4.02%	▲2,072,752	+44.44%	$353.00K
7	RENAISSANCE TECHNOLOGIES LLC	0001037389	6,460,928	3.86%	▲300,500	+4.88%	$338.52Mn
8	GEODE CAPITAL MANAGEMENT, LLC	0001214717	4,477,876	2.67%	▲295,609	+7.07%	$234.66Mn
9	DIMENSIONAL FUND ADVISORS LP	0000354204	4,194,873	2.50%	▼327,505	-7.24%	$219.79Mn
10	Deep Track Capital, LP	0001856083	4,000,000	2.39%	▲409,677	+11.41%	$209.58Mn
11	AMERICAN CENTURY COMPANIES INC	0000748054	3,954,239	2.36%	▼2,117,864	-34.88%	$207.18Mn
12	Holocene Advisors, LP	0001700574	3,601,472	2.15%	▲1,284,146	+55.41%	$188.70Mn
13	Commodore Capital LP	0001831942	3,000,000	1.79%	▼1,200,000	-28.57%	$157.19Mn
14	WELLINGTON MANAGEMENT GROUP LLP	0000902219	2,814,804	1.68%	▼155,362	-5.23%	$147.48Mn
15	PRIMECAP MANAGEMENT CO/CA/	0000763212	2,528,680	1.51%	▼11,310	-0.45%	$132.49Mn
16	FIRST TRUST ADVISORS LP	0001125816	2,421,016	1.45%	▼547,769	-18.45%	$126.85Mn
17	CHARLES SCHWAB INVESTMENT MANAGEMENT INC	0000884546	2,335,117	1.39%	▲98,361	+4.40%	$122.35Mn
18	Nuveen, LLC	0001871926	2,324,197	1.39%	▼136,372	-5.54%	$121.78Mn
19	NORGES BANK	0001374170	2,156,814	1.29%	▲2,156,814	0.00%	$113.01Mn
20	BVF INC/IL	0001056807	2,154,704	1.29%	▲154,704	+7.74%	$112.90Mn

Showing 1 to 20 of 421 holders