ALKS · Alkermes plc. · Shareholders & Ownership

$43.89 -0.23 (-0.51%)

S&P 600 member Russell 2000 member Rebalance outlook locked

Market Cap

$7.36B

167.76M

Volume · Oct 21 917.17K Avg daily vol (3M) 1.92M

Every disclosed holder of ALKS in one list: 13F institutions, Schedule 13D and 13G filers, insiders (Forms 3, 4 and 5) and registered funds, each from its own latest filing. Holders nest by CIK and SEC reporting links, never by name, and each is summed once.

How the holder list picks a filing →

Who Owns ALKS

13F quarter Sep 30, 2026, combined view: filers that have not filed yet carry their Jun 30, 2026 positions

No chart: the summed disclosures exceed shares outstanding, so they are not parts of one whole.

Holder group	Holders	Shares	% Out	Summed
Institutional (13F)	427	177,985,677	106.09%	Yes
Insiders (Forms 3, 4, 5)	16	2,501,990	1.49%	Yes
13D/G-only blocks	0	0	0.00%	Yes
Remaining	—	12,724,395	-7.58%	Negative
Registered funds (N-PORT, not summed)	154	30,477,226	18.17%	No

Shares outstanding: 167,763,272, the issuer's latest cover-page count restated onto today's split basis.

Remaining is negative: the summed disclosures exceed shares outstanding, as when filings are dated at different times or holders that do not disclose their links count the same shares. It is flagged, not clipped.

13D/G-only counts each filer's latest 13D or 13G that no 13F report of the listing contains, that names no 13F filer and that no counted insider files. Funds are never summed: their shares sit inside their advisers' 13F reports.

Holders of ALKS

One row per holder Every filing By ultimate parent

All 13F Funds Insiders 13D/G Non-US

#	Holder	Shares	% Out	Change	As of	Notes
1	BlackRock, Inc. 13F CIK 2012383 · Holding company · Jun 30, 2026 carried, not yet filed for the newest quarter	29,235,739	17.43%	+921,329	Jun 30, 2026	carried, not yet filed for the newest quarter
1.1	iShares ESG Aware MSCI USA Small-Cap ETF Fund S000061604 · Registered fund · May 31, 2026 iShares Trust, not summed	88,457	0.05%	-1,569	May 31, 2026	iShares Trust, not summed
1.2	iShares MSCI World Small-Cap ETF Fund S000091430 · Registered fund · May 31, 2026 iShares Trust, not summed	9,178	0.01%	—	May 31, 2026	iShares Trust, not summed
1.3	iShares Dow Jones U.S. ETF Fund S000004330 · Registered fund · Jul 31, 2026 iShares Trust, not summed	7,037	0.00%	-44	Jul 31, 2026	iShares Trust, not summed
1.4	iShares Neuroscience and Healthcare ETF Fund S000076483 · Registered fund · Jul 31, 2026 iShares Trust, not summed	5,153	0.00%	-1,293	Jul 31, 2026	iShares Trust, not summed
2	BAKER BROS. ADVISORS LP 13F CIK 1263508 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	10,012,267	5.97%	0	Jun 30, 2026	carried, not yet filed for the newest quarter
3	VANGUARD PORTFOLIO MANAGEMENT LLC 13F CIK 2100121 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	9,490,818	5.66%	-20,294	Jun 30, 2026	carried, not yet filed for the newest quarter
4	STATE STREET CORP 13F CIK 93751 · Bank · Jun 30, 2026 carried, not yet filed for the newest quarter	9,160,575	5.46%	-304,711	Jun 30, 2026	carried, not yet filed for the newest quarter
5	VANGUARD CAPITAL MANAGEMENT LLC 13F CIK 2100119 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	7,515,025	4.48%	+87,628	Jun 30, 2026	carried, not yet filed for the newest quarter
6	PRICE T ROWE ASSOCIATES INC /MD/ 13F CIK 80255 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	6,737,328	4.02%	+2,072,752	Jun 30, 2026	carried, not yet filed for the newest quarter
6.1	T. Rowe Price Small-Mid Cap ETF Fund S000079837 · Registered fund · Jun 30, 2026 T. Rowe Price Exchange-Traded Funds, Inc., not summed	101,442	0.06%	+34,106	Jun 30, 2026	T. Rowe Price Exchange-Traded Funds, Inc., not summed
7	RENAISSANCE TECHNOLOGIES LLC 13F CIK 1037389 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	6,460,928	3.85%	+300,500	Jun 30, 2026	carried, not yet filed for the newest quarter
8	VANGUARD TOTAL STOCK MARKET INDEX FUND Fund S000002848 · Registered fund · Jun 30, 2026 VANGUARD INDEX FUNDS, not summed	5,297,487	3.16%	+17,865	Jun 30, 2026	VANGUARD INDEX FUNDS, not summed
9	GEODE CAPITAL MANAGEMENT, LLC 13F CIK 1214717 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	4,477,876	2.67%	+295,609	Jun 30, 2026	carried, not yet filed for the newest quarter
10	DIMENSIONAL FUND ADVISORS LP 13F CIK 354204 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	4,194,873	2.50%	-327,505	Jun 30, 2026	carried, not yet filed for the newest quarter
10.1	Dimensional U.S. Small Cap ETF Fund S000070906 · Registered fund · Jul 31, 2026 Dimensional ETF Trust, not summed	512,107	0.31%	+4,243	Jul 31, 2026	Dimensional ETF Trust, not summed
10.2	Dimensional U.S. Core Equity 2 ETF Fund S000070903 · Registered fund · Jul 31, 2026 Dimensional ETF Trust, not summed	290,023	0.17%	-18,794	Jul 31, 2026	Dimensional ETF Trust, not summed
10.3	Dimensional U.S. Targeted Value ETF Fund S000070901 · Registered fund · Jul 31, 2026 Dimensional ETF Trust, not summed	283,827	0.17%	-44,835	Jul 31, 2026	Dimensional ETF Trust, not summed
10.4	Dimensional U.S. Marketwide Value ETF Fund S000075030 · Registered fund · Jul 31, 2026 Dimensional ETF Trust, not summed	118,114	0.07%	-2,143	Jul 31, 2026	Dimensional ETF Trust, not summed
10.5	Dimensional US Core Equity Market ETF Fund S000069432 · Registered fund · Jul 31, 2026 Dimensional ETF Trust, not summed	33,847	0.02%	0	Jul 31, 2026	Dimensional ETF Trust, not summed
11	Deep Track Capital, LP 13F CIK 1856083 · Investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	4,000,000	2.38%	+409,677	Jun 30, 2026	carried, not yet filed for the newest quarter
12	AMERICAN CENTURY COMPANIES INC 13F CIK 748054 · Unknown · Jun 30, 2026 carried, not yet filed for the newest quarter	3,954,239	2.36%	-2,117,864	Jun 30, 2026	carried, not yet filed for the newest quarter
12.1	Small Cap Growth Fund Fund S000006193 · Registered fund · Jul 31, 2026 American Century Mutual Funds, Inc., not summed	993,354	0.59%	+180,258	Jul 31, 2026	American Century Mutual Funds, Inc., not summed
12.2	Small Company Fund Fund S000005981 · Registered fund · Jun 30, 2026 American Century Quantitative Equity Funds, Inc., not summed	55,054	0.03%	-6,034	Jun 30, 2026	American Century Quantitative Equity Funds, Inc., not summed
13	VANGUARD SMALL-CAP INDEX FUND Fund S000002845 · Registered fund · Jun 30, 2026 VANGUARD INDEX FUNDS, not summed	3,823,805	2.28%	-18,466	Jun 30, 2026	VANGUARD INDEX FUNDS, not summed
14	Holocene Advisors, LP 13F CIK 1700574 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	3,601,472	2.15%	+1,284,146	Jun 30, 2026	carried, not yet filed for the newest quarter
15	Avantis U.S. Small Cap Value ETF Fund S000066459 · Registered fund · May 31, 2026 American Century ETF Trust, not summed	3,266,861	1.95%	-1,252,775	May 31, 2026	American Century ETF Trust, not summed
16	Commodore Capital LP 13F CIK 1831942 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	3,000,000	1.79%	-1,200,000	Jun 30, 2026	carried, not yet filed for the newest quarter
17	WELLINGTON MANAGEMENT GROUP LLP 13F CIK 902219 · Holding company · Jun 30, 2026 carried, not yet filed for the newest quarter	2,814,804	1.68%	-155,362	Jun 30, 2026	carried, not yet filed for the newest quarter
18	PRIMECAP MANAGEMENT CO/CA/ 13F CIK 763212 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	2,528,680	1.51%	-11,310	Jun 30, 2026	carried, not yet filed for the newest quarter
18.1	VANGUARD CAPITAL OPPORTUNITY FUND Fund S000002594 · Registered fund · Jun 30, 2026 VANGUARD HORIZON FUNDS, not summed	1,715,050	1.02%	-7,000	Jun 30, 2026	VANGUARD HORIZON FUNDS, not summed
19	FIRST TRUST ADVISORS LP 13F CIK 1125816 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	2,421,016	1.44%	-547,769	Jun 30, 2026	carried, not yet filed for the newest quarter
20	CHARLES SCHWAB INVESTMENT MANAGEMENT INC 13F CIK 884546 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	2,335,117	1.39%	+98,361	Jun 30, 2026	carried, not yet filed for the newest quarter
21	Nuveen, LLC 13F CIK 1871926 · Unknown · Jun 30, 2026 carried, not yet filed for the newest quarter	2,324,197	1.39%	-136,372	Jun 30, 2026	carried, not yet filed for the newest quarter
21.1	College Retirement Equities Fund - Total Global Stock Account Fund S000005080 · Registered fund · Jun 30, 2026 College Retirement Equities Fund, not summed	703,052	0.42%	-94,025	Jun 30, 2026	College Retirement Equities Fund, not summed
21.2	Nuveen Quant Small Cap Equity Fund Fund S000005386 · Registered fund · Jul 31, 2026 TIAA-CREF Funds, not summed	377,490	0.23%	-7,470	Jul 31, 2026	TIAA-CREF Funds, not summed
21.3	Nuveen Small Cap Blend Index Fund Fund S000005367 · Registered fund · Jul 31, 2026 TIAA-CREF Funds, not summed	218,774	0.13%	+27,173	Jul 31, 2026	TIAA-CREF Funds, not summed
21.4	Nuveen ESG Small-Cap ETF Fund S000055815 · Registered fund · Jul 31, 2026 NuShares ETF Trust, not summed	152,593	0.09%	-10,682	Jul 31, 2026	NuShares ETF Trust, not summed
21.5	Nuveen Equity Index Fund Fund S000005360 · Registered fund · Jul 31, 2026 TIAA-CREF Funds, not summed	132,367	0.08%	0	Jul 31, 2026	TIAA-CREF Funds, not summed
22	VANGUARD SMALL-CAP GROWTH INDEX FUND Fund S000002846 · Registered fund · Jun 30, 2026 VANGUARD INDEX FUNDS, not summed	2,202,262	1.31%	+53,402	Jun 30, 2026	VANGUARD INDEX FUNDS, not summed
23	NORGES BANK 13F CIK 1374170 · Non-US institution · Jun 30, 2026 carried, not yet filed for the newest quarter	2,156,814	1.29%	—	Jun 30, 2026	carried, not yet filed for the newest quarter
24	BVF INC/IL 13F CIK 1056807 · Unknown · Jun 30, 2026 carried, not yet filed for the newest quarter	2,154,704	1.28%	+154,704	Jun 30, 2026	carried, not yet filed for the newest quarter
25	GOLDMAN SACHS GROUP INC 13F CIK 886982 · Holding company · Jun 30, 2026 carried, not yet filed for the newest quarter	2,023,984	1.21%	+141,806	Jun 30, 2026	carried, not yet filed for the newest quarter
26	Bain Capital Life Sciences Investors, LLC 13F CIK 1703031 · Unknown · Jun 30, 2026 carried, not yet filed for the newest quarter	1,937,938	1.16%	+1,327,938	Jun 30, 2026	carried, not yet filed for the newest quarter
27	VANGUARD EXTENDED MARKET INDEX FUND Fund S000002841 · Registered fund · Jun 30, 2026 VANGUARD INDEX FUNDS, not summed	1,911,626	1.14%	+69,104	Jun 30, 2026	VANGUARD INDEX FUNDS, not summed
28	NORTHERN TRUST CORP 13F CIK 73124 · Bank · Jun 30, 2026 carried, not yet filed for the newest quarter	1,831,619	1.09%	+134,537	Jun 30, 2026	carried, not yet filed for the newest quarter
28.1	Small Cap Index Fund Fund S000001245 · Registered fund · Jun 30, 2026 Northern Funds, not summed	84,805	0.05%	+9,412	Jun 30, 2026	Northern Funds, not summed
28.2	Small Cap Core Fund Fund S000001244 · Registered fund · Jun 30, 2026 Northern Funds, not summed	17,472	0.01%	-499	Jun 30, 2026	Northern Funds, not summed
29	MORGAN STANLEY 13F CIK 895421 · Holding company · Jun 30, 2026 carried, not yet filed for the newest quarter	1,751,882	1.04%	+15,791	Jun 30, 2026	carried, not yet filed for the newest quarter
30	RTW INVESTMENTS, LP 13F CIK 1493215 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	1,672,356	1.00%	0	Jun 30, 2026	carried, not yet filed for the newest quarter
31	CITADEL ADVISORS LLC 13F CIK 1423053 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	1,645,101	0.98%	-596,483	Jun 30, 2026	carried, not yet filed for the newest quarter
32	LOOMIS SAYLES & CO L P 13F CIK 312348 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	1,585,518	0.95%	-199,063	Jun 30, 2026	carried, not yet filed for the newest quarter
33	POPS RICHARD F Insider CIK 1126490 · Feb 5, 2026 Director, issuer-wide	1,377,740	0.82%	+87,350	Feb 5, 2026	Director, issuer-wide
34	ADAGE CAPITAL PARTNERS GP, L.L.C. 13F CIK 1165408 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	1,368,000	0.82%	+1,368,000	Jun 30, 2026	carried, not yet filed for the newest quarter
35	D. E. Shaw & Co., Inc. 13F CIK 1009207 · Unknown · Jun 30, 2026 carried, not yet filed for the newest quarter	1,312,031	0.78%	+601,734	Jun 30, 2026	carried, not yet filed for the newest quarter
36	Driehaus Capital Management LLC 13F CIK 938206 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	1,238,809	0.74%	+446,846	Jun 30, 2026	carried, not yet filed for the newest quarter
36.1	Driehaus Small Cap Growth Fund Fund S000058261 · Registered fund · Jun 30, 2026 Driehaus Mutual Funds, not summed	170,453	0.10%	+16,660	Jun 30, 2026	Driehaus Mutual Funds, not summed
36.2	Driehaus Small/Mid Cap Growth Fund Fund S000068519 · Registered fund · Jun 30, 2026 Driehaus Mutual Funds, not summed	14,490	0.01%	—	Jun 30, 2026	Driehaus Mutual Funds, not summed
37	VANGUARD FIDUCIARY TRUST CO 13F CIK 933478 · Unknown · Jun 30, 2026 carried, not yet filed for the newest quarter	1,177,945	0.70%	+48,709	Jun 30, 2026	carried, not yet filed for the newest quarter
38	FRANKLIN RESOURCES INC 13F CIK 38777 · Investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	1,170,242	0.70%	+987,707	Jun 30, 2026	carried, not yet filed for the newest quarter
39	BNP PARIBAS ASSET MANAGEMENT Holding S.A. 13F CIK 1520354 · Non-US institution · Jun 30, 2026 carried, not yet filed for the newest quarter	1,159,216	0.69%	+919,545	Jun 30, 2026	carried, not yet filed for the newest quarter
40	FMR LLC 13F CIK 315066 · Holding company · Jun 30, 2026 carried, not yet filed for the newest quarter	1,134,410	0.68%	-189,337	Jun 30, 2026	carried, not yet filed for the newest quarter
41	Affinity Asset Advisors, LLC 13F CIK 1773195 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	1,125,000	0.67%	-225,000	Jun 30, 2026	carried, not yet filed for the newest quarter
42	Bank of New York Mellon Corp 13F CIK 1390777 · Bank · Jun 30, 2026 carried, not yet filed for the newest quarter	1,097,282	0.65%	+60,822	Jun 30, 2026	carried, not yet filed for the newest quarter
43	T. Rowe Price Investment Management, Inc. 13F CIK 1897612 · Investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	1,090,947	0.65%	+196,671	Jun 30, 2026	carried, not yet filed for the newest quarter
44	VANGUARD TAX-MANAGED SMALL-CAP FUND Fund S000004387 · Registered fund · Jun 30, 2026 VANGUARD TAX-MANAGED FUNDS, not summed	1,075,769	0.64%	0	Jun 30, 2026	VANGUARD TAX-MANAGED FUNDS, not summed
45	TWO SIGMA INVESTMENTS, LP 13F CIK 1179392 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	1,038,311	0.62%	+257,628	Jun 30, 2026	carried, not yet filed for the newest quarter
46	Soleus Capital Management, L.P. 13F CIK 1802630 · Unknown · Jun 30, 2026 carried, not yet filed for the newest quarter	1,029,252	0.61%	-941,612	Jun 30, 2026	carried, not yet filed for the newest quarter
47	PRINCIPAL FINANCIAL GROUP INC 13F CIK 1126328 · Insurance company · Jun 30, 2026 carried, not yet filed for the newest quarter	983,822	0.59%	+25,806	Jun 30, 2026	carried, not yet filed for the newest quarter
47.1	SmallCap S&P 600 Index Fund Fund S000007203 · Registered fund · Jul 31, 2026 Principal Funds, Inc, not summed	122,803	0.07%	-6,985	Jul 31, 2026	Principal Funds, Inc, not summed
47.2	SmallCap Growth Fund I Fund S000007175 · Registered fund · Jul 31, 2026 Principal Funds, Inc, not summed	11,549	0.01%	+3,893	Jul 31, 2026	Principal Funds, Inc, not summed
47.3	SmallCap Value Fund II Fund S000007169 · Registered fund · Jul 31, 2026 Principal Funds, Inc, not summed	2,236	0.00%	+922	Jul 31, 2026	Principal Funds, Inc, not summed
48	MARSHALL WACE, LLP 13F CIK 1318757 · Exempt reporting adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	969,954	0.58%	-29,368	Jun 30, 2026	carried, not yet filed for the newest quarter
49	SUMMIT PARTNERS PUBLIC ASSET MANAGEMENT, LLC 13F CIK 1638555 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	950,234	0.57%	+950,234	Jun 30, 2026	carried, not yet filed for the newest quarter
50	BANK OF AMERICA CORP /DE/ 13F CIK 70858 · Bank · Jun 30, 2026 carried, not yet filed for the newest quarter	918,303	0.55%	-292,548	Jun 30, 2026	carried, not yet filed for the newest quarter

14 more nested rows are not shown here; Every filing lists them all.

Shares are restated onto today's split basis. Change compares each row with the same holder's previous filing in the same source; a dash means there is none to compare. Nested 13D/G, insider and fund rows are not summed, since a 13F report already holds them.

Showing 1–50 of 512 holders

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Key facts CIK 1520262 CUSIP G01767105 13F (30d) 44 filings 44 filers Visit website Investor relations