Alkermes ALKS Institutional Ownership

NASDAQ ALKS

$45.54 +0.05 (+0.11%)

As of: Sep 9, 2026 · 11:59 AM 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%

▲+2.22 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

$8.29Bn

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) showed up in the 13F filings of 422 institutional investors as of June 2026.

These investors collectively held 107.6% of Alkermes's outstanding shares in June 2026, up from 105.4% in March 2026.
Their total shares held in ALKS increased 4.92% from the prior quarter, while the number of investors in Alkermes increased 20.57% year over year.
Activity in ALKS broke down as 234 buyers, 132 sellers, and 56 unchanged among 422 total holders.
Combined, these investors held 179.72Mn shares in ALKS for June 2026, up by 8.43Mn shares quarter on quarter, and up 10.47Mn shares year over year.
As of June 30, 2026, BlackRock, Inc. held the largest stake in Alkermes with 29.24Mn shares, accounting for 17.5% of total shares outstanding.
Top purchasers of ALKS stock for the quarter ending June 2026 included 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).
Top sellers of ALKS stock for the quarter ending June 2026 included 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).
Business Quant data shows the 10 biggest positions in Alkermes as of June 2026 are held by 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