Alkermes Ownership | Who Owns Alkermes?

Overview Forecast RevenueFinancials Chart Transcripts

Alkermes Ownership Summary

Alkermes is owned by 17.00% institutional investors, 1.57% insiders, and 81.43% retail investors. Blackrock is the largest institutional shareholder, holding 17.33% of ALKS shares. iShares Core S&P Small-Cap ETF is the top mutual fund, with 6.04% of its assets in Alkermes shares.

ALKS Ownership Benchmark

Type	Name	% Inst	% Insiders	% Retail
Stock	Alkermes	17.00%	1.57%	81.43%
Sector	Healthcare Stocks	232.86%	10.65%	-143.51%
Industry	Biotech Stocks	382.13%	10.41%	-292.54%

Institutional Shareholders

Top Institutional Shareholders by Total Shares

Holder	Shares	% Holding	Value
Blackrock	29.11M	17.33%	$701.49M
Blackrock funding, inc. /de	28.27M	17.13%	$791.06M
Vanguard group	18.01M	10.91%	$503.85M
Price t rowe associates inc /md/	10.24M	6.21%	$307.15M
State street	8.54M	5.18%	$256.21M
Baker bros. advisors lp	8.09M	4.91%	$242.74M
Renaissance	6.67M	4.04%	$186.57M
Jpmorgan chase	5.18M	3.14%	$145.06M
Dimensional fund advisors lp	4.52M	2.75%	$159.85M
American century companies	4.40M	2.67%	$131.92M

Top Institutional Shareholders by % of Total Assets

Holder	Shares	% Assets	Value
Sio capital management	674.84K	5.12%	$20.25M
Commodore capital lp	3.10M	4.54%	$92.90M
Affinity asset advisors	1.25M	3.27%	$37.50M
Bioimpact capital	549.26K	2.70%	$16.48M
Krensavage asset management	207.82K	2.66%	$6.24M
Healthinvest partners ab	242.47K	2.16%	$6.78M
Opaleye management	450.00K	1.91%	$13.50M
Baker bros. advisors lp	8.09M	1.75%	$242.74M
Paradigm biocapital advisors lp	1.72M	1.47%	$51.58M
Stempoint capital lp	241.64K	1.45%	$7.25M

Top Buyers

Holder	Shares	% Assets	Change
Norges bank	1.95M	0.01%	1.95M
Baker bros. advisors lp	8.09M	1.75%	1.68M
Soleus capital management	1.32M	1.36%	1.32M
Jpmorgan chase	5.18M	0.01%	1.26M
Vanguard fiduciary trust	1.13M	0.01%	1.13M

Top Sellers

Holder	Shares	% Assets	Change
Deep track capital, lp	-	-	-3.50M
Rtw investments, lp	1.67M	0.62%	-3.01M
Hardman johnston global advisors	-	-	-2.67M
Ubs group	495.02K	0.00%	-2.05M
Camber capital management lp	-	-	-1.50M

New Positions

Holder	Shares	% Assets	Change	Value
Norges bank	1.95M	0.01%	1.95M	$54.44M
Soleus capital management	1.32M	1.36%	1.32M	$37.00M
Vanguard fiduciary trust	1.13M	0.01%	1.13M	$39.93M
Sio capital management	674.84K	5.12%	674.84K	$20.25M
Opaleye management	450.00K	1.91%	450.00K	$13.50M

Sold Out

Holder	Change
Financial gravity asset management	-1.00
Harbor investment advisory	-1.00
Mather group, llc.	-2.00
Transamerica financial advisors	-8.00
Financial synergies wealth advisors	-9.00

Institutional Ownership Trends

Date	Holdings	Change %	Shares	Change %	Ownership	Change %	Increased Position	Change %	Decreased Position	Change %
Dec 31, 2025	109	-70.05%	28,066,494	-83.45%	17	0.16%	61	-68.88%	32	-75.94%
Sep 30, 2025	135	-62.60%	35,434,318	-79.06%	21	0.20%	61	-69.19%	61	-48.74%
Jun 30, 2025	355	-6.58%	168,942,978	-0.75%	102	0.94%	194	3.19%	118	-10.61%
Mar 31, 2025	377	7.41%	169,214,033	1.17%	103	0.99%	185	6.94%	132	7.32%
Dec 31, 2024	341	-	166,201,187	-5.94%	101	0.87%	167	-3.47%	121	2.54%

Top Mutual Funds Shareholders

Holder	Shares	% Holding	Change
iShares Core S&P Small-Cap ETF	10.06M	6.04%	2.13K
Vanguard Total Stock Mkt Idx Inv	5.28M	3.18%	29.62K
Vanguard US Total Market Shares ETF	5.16M	3.17%	-174.71K
Avantis US Small Cap Value ETF	3.96M	2.37%	-
Vanguard Small Cap Index	3.85M	2.31%	97.16K
iShares Russell 2000 ETF	3.82M	2.29%	32.20K
State Street® SPDR® S&P® Biotech ETF	3.40M	2.05%	-33.65K
Pacer US Small Cap Cash Cows 100 ETF	2.98M	1.84%	-21.71K
T. Rowe Price U.S. Mid-Cap Val Eq Tr-Z	2.64M	1.62%	-69.71K
First Trust NYSE Arca Biotech ETF	2.26M	1.36%	-10.51K

Recent Insider Transactions

Date	Name	Role	Activity	Value
May 04, 2026	Gaffin David Joseph	EVP, CLO, Alkermes, Inc.	Sell	$67.53K
May 01, 2026	Hopkinson Craig C.	EVP R&D, Chief Medical Officer	Sell	$300.56K
Apr 06, 2026	Gaffin David Joseph	EVP, CLO, Alkermes, Inc.	Sell	$70.32K
Apr 01, 2026	Hopkinson Craig C.	EVP R&D, Chief Medical Officer	Sell	$319.60K
Mar 02, 2026	Parisi Samuel Joseph	VP, Finance (Interim PAO)	Sell	$201.81K

Insider Transactions Trends

Date	Buy	Sell
2026 Q2	-	4
2026 Q1	-	11
2025 Q4	-	4
2025 Q3	-	-
2025 Q2	-	2

ALKS Ownership FAQ

Who Owns Alkermes?

Alkermes shareholders are primarily institutional investors at 17.00%, followed by 1.57% insiders and 81.43% retail investors. The average institutional ownership in Alkermes's industry, Biotech Stocks , is 382.13%, which Alkermes falls below.

Who owns the most shares of Alkermes?

Alkermes’s largest shareholders are Blackrock (29.11M shares, 17.33%), Blackrock funding, inc. /de (28.27M shares, 17.13%), and Vanguard group (18.01M shares, 10.91%). Together, they hold 45.36% of Alkermes’s total shares outstanding.

Does Blackrock own Alkermes?

Yes, BlackRock owns 17.33% of Alkermes, totaling 29.11M shares as of Jun 2024. This represents 0.02% of BlackRock's total assets, with a market value of 701.49M$. In the last quarter, BlackRock decreased its holdings by -60.933K shares, a -0.21% change.

Who is Alkermes’s biggest shareholder by percentage of total assets invested?

Sio capital management is Alkermes’s biggest shareholder by percentage of total assets invested, with 5.12% of its assets in 674.84K Alkermes shares, valued at 20.25M$.

Who is the top mutual fund holder of Alkermes shares?

iShares Core S&P Small-Cap ETF is the top mutual fund holder of Alkermes shares, with 6.04% of its total shares outstanding invested in 10.06M Alkermes shares.

Try Tickergate Pro Free

Customize Everything. 100% Flexibility. Fast and Easy to Use (No code or Excel Needed)

Customize your own personal stocks lists, views and charts
Choose from hundreds of fields, up to 15 years of history
Conduct deep comparison analysis

Discover trending investment themes
Find your next best investment
Research stocks using tools