Alkermes ALKS Institutional Ownership

NASDAQ ALKS

$40.80 +0.65 (+1.62%)

At close: Sep 29, 2026 · 4:00 PM EDT

Institutions by Trading Activity

422 Institutions

Increased 234 55.5%

Unchanged 56 13.3%

Reduced 132 31.3%

Ownership Statistics

13F · as of 30 Jun, 2026

Institutional Ownership

107.60%

▲+2.32 pp QoQ

Shares Held by Institutions

179.72Mn

of 167.03Mn outstanding

▲+4.92% QoQ

Shares Outstanding

167.03Mn

-12.69Mn held outside 13F filers

Institutional Investors

422

filed 13F for Jun 2026

▲+38 vs prior quarter

Net Shares Added (QoQ)

+8.43Mn

accumulated since last quarter

Value of Holdings

$7.22Bn

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

Quarter ending 30 Jun, 2026

Alkermes plc. (NASDAQ:ALKS) has 422 institutional investors with active 13F positions as of June 2026.

They owned 107.6% of outstanding stock in June 2026, up from 105.3% the prior quarter.
They increased total shares held in Alkermes by 4.92% from the prior quarter, while the number of investors in ALKS increased 20.57% year over year.
During the quarter, 234 of these 422 funds increased positions in ALKS, 132 reduced exposure, and 56 held steady.
In total, institutional investors held 179.72Mn shares in Alkermes as of June 2026, up by 8.43Mn shares quarter on quarter, and up 12.56Mn shares year over year.
BlackRock, Inc. leads ownership in ALKS with 29.24Mn shares as of June 30, 2026, equal to 17.5% of outstanding shares.
The most significant purchases of ALKS for the quarter ending June 2026 came from Sixth Street Partners Management Company, L.P. (2.34Mn), NORGES BANK (2.16Mn), PRICE T ROWE ASSOCIATES INC /MD/ (2.07Mn), ADAGE CAPITAL PARTNERS GP, L.L.C. (1.37Mn), Bain Capital Life Sciences Investors, LLC (1.33Mn).
Leading sellers of Alkermes shares for the quarter ending June 2026 were Jpmorgan Chase & Co (3.84Mn), AMERICAN CENTURY COMPANIES INC (2.12Mn), Commodore Capital LP (1.2Mn), Soleus Capital Management, L.P. (941.61K), CITADEL ADVISORS LLC (596.48K).
Per Business Quant, the top 10 investors in ALKS for the quarter ending June 2026 include BlackRock, Inc. (29.24Mn), BAKER BROS. ADVISORS LP (10.01Mn), VANGUARD PORTFOLIO MANAGEMENT LLC (9.49Mn), State Street Corp (9.16Mn), VANGUARD CAPITAL MANAGEMENT LLC (7.52Mn), PRICE T ROWE ASSOCIATES INC /MD/ (6.74Mn), RENAISSANCE TECHNOLOGIES LLC (6.46Mn), GEODE CAPITAL MANAGEMENT, LLC (4.48Mn), DIMENSIONAL FUND ADVISORS LP (4.19Mn), Deep Track Capital, LP (4.0Mn).

Form 13F Holdings

422 Institutional Holders

Report period 30 Jun, 2026

Total shares held 179.72Mn

Of outstanding 107.60%

#	Institution	CIK	Shares Held	% of Outstanding	Change (QoQ)	Change (%)	Value (USD)
1	BlackRock, Inc.	0002012383	29,235,739	17.50%	▲921,329	+3.25%	$1.53Bn
2	BAKER BROS. ADVISORS LP	0001263508	10,012,267	5.99%	0	0.00%	$524.59Mn
3	VANGUARD PORTFOLIO MANAGEMENT LLC	0002100121	9,490,818	5.68%	▼20,294	-0.21%	$497.27Mn
4	State Street Corp	0000093751	9,160,575	5.48%	▼304,711	-3.22%	$479.97Mn
5	VANGUARD CAPITAL MANAGEMENT LLC	0002100119	7,515,025	4.50%	▲87,628	+1.18%	$393.75Mn
6	PRICE T ROWE ASSOCIATES INC /MD/	0000080255	6,737,328	4.03%	▲2,072,752	+44.44%	$353.00K
7	RENAISSANCE TECHNOLOGIES LLC	0001037389	6,460,928	3.87%	▲300,500	+4.88%	$338.52Mn
8	GEODE CAPITAL MANAGEMENT, LLC	0001214717	4,477,876	2.68%	▲295,609	+7.07%	$234.66Mn
9	DIMENSIONAL FUND ADVISORS LP	0000354204	4,194,873	2.51%	▼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	2.37%	▼2,117,864	-34.88%	$207.18Mn
12	Holocene Advisors, LP	0001700574	3,601,472	2.16%	▲1,284,146	+55.41%	$188.70Mn
13	Commodore Capital LP	0001831942	3,000,000	1.80%	▼1,200,000	-28.57%	$157.19Mn
14	WELLINGTON MANAGEMENT GROUP LLP	0000902219	2,814,804	1.69%	▼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	1.40%	▲98,361	+4.40%	$122.35Mn
17	Sixth Street Partners Management Company, L.P.	0001812095	2,335,117	1.40%	▲2,335,117	0.00%	$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

Showing 1 to 20 of 422 holders