Alkermes Ownership | Who Owns Alkermes?

Overview Forecast RevenueFinancials Chart Transcripts

Alkermes Ownership Summary

Alkermes is owned by 105.42% institutional investors, 1.42% insiders. 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	105.42%	1.42%	-6.84%
Sector	Healthcare Stocks	35.58%	11.87%	52.55%
Industry	Biotech Stocks	35.75%	11.83%	52.41%

Institutional Shareholders

Top Institutional Shareholders by Total Shares

Holder	Shares	% Holding	Value
Blackrock	29.11M	17.33%	$701.49M
Blackrock funding, inc. /de	28.31M	17.19%	$1.00B
Vanguard group	18.01M	10.91%	$503.85M
Baker bros. advisors lp	10.01M	6.08%	$354.03M
State street	9.47M	5.75%	$334.69M
Renaissance	6.16M	3.74%	$217.83M
American century companies	6.07M	3.69%	$214.71M
Price t rowe associates inc /md/	4.66M	2.83%	$164.94M
Dimensional fund advisors lp	4.52M	2.75%	$159.85M
Commodore capital lp	4.20M	2.55%	$148.51M

Top Institutional Shareholders by % of Total Assets

Holder	Shares	% Assets	Value
Commodore capital lp	4.20M	8.59%	$148.51M
Prosight management, lp	513.63K	2.98%	$18.16M
Soleus capital management	1.97M	2.82%	$69.69M
Bioimpact capital	549.26K	2.70%	$16.48M
Healthinvest partners ab	242.47K	2.66%	$8.24M
Knott david m jr	120.00K	2.53%	$4.24M
Affinity asset advisors	1.35M	2.47%	$47.74M
Bvf inc/il	2.00M	2.25%	$70.72M
Deep track capital, lp	3.59M	2.07%	$126.95M
Baker bros. advisors lp	10.01M	2.03%	$354.03M

Top Buyers

Holder	Shares	% Assets	Change
Holocene advisors, lp	2.32M	0.20%	2.32M
Bvf inc/il	2.00M	2.25%	2.00M
Norges bank	1.95M	0.01%	1.95M
Deep track capital, lp	3.59M	2.07%	1.59M
First trust advisors lp	2.97M	0.07%	1.51M

Top Sellers

Holder	Shares	% Assets	Change
Price t rowe associates inc /md/	4.66M	0.02%	-4.33M
Hardman johnston global advisors	-	-	-2.67M
Ubs group	495.02K	0.00%	-2.05M
Camber capital management lp	-	-	-1.50M
Arrowstreet capital, limited partnership	-	-	-1.45M

New Positions

Holder	Shares	% Assets	Change	Value
Bvf inc/il	2.00M	2.25%	2.00M	$70.72M
Norges bank	1.95M	0.01%	1.95M	$54.44M
Vanguard fiduciary trust	1.13M	0.01%	1.13M	$39.93M
Bain capital life sciences investors	610.00K	1.95%	610.00K	$21.57M
Prosight management, lp	513.63K	2.98%	513.63K	$18.16M

Sold Out

Holder	Change
Financial gravity asset management	-1.00
Harbor investment advisory	-1.00
Mather group, llc.	-2.00
Financial synergies wealth advisors	-9.00
Flagship harbor advisors	-10.00

Institutional Ownership Trends

Date	Holdings	Change %	Shares	Change %	Ownership	Change %	Increased Position	Change %	Decreased Position	Change %
Mar 31, 2026	387	3.48%	173,625,031	-3.72%	105	0.88%	192	-4.48%	143	14.40%
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%

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	5.30M	3.18%	14.14K
Vanguard US Total Market Shares ETF	5.16M	3.17%	-174.71K
Lord Abbett Floating Rate I	4.68M	2.81%	4.68M
Avantis US Small Cap Value ETF	3.96M	2.37%	-
Vanguard Small Cap Index	3.84M	2.30%	-7.80K
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

Recent Insider Transactions

Date	Name	Role	Activity	Value
Jun 01, 2026	Hopkinson Craig C.	EVP R&D, Chief Medical Officer	Sell	$375.04K
May 29, 2026	Parisi Samuel Joseph	VP, Finance (Interim PAO)	Sell	$687.01K
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

Insider Transactions Trends

Date	Buy	Sell
2026 Q2	-	6
2026 Q1	-	11
2025 Q4	-	4
2025 Q3	-	-
2025 Q2	-	2

ALKS Ownership FAQ

Who Owns Alkermes?

Alkermes shareholders are primarily institutional investors at 105.42%, followed by 1.42% insiders and -6.84% retail investors. The average institutional ownership in Alkermes's industry, Biotech Stocks , is 35.75%, which Alkermes exceeds.

Who owns the most shares of Alkermes?

Alkermes’s largest shareholders are Blackrock (29.11M shares, 17.33%), Blackrock funding, inc. /de (28.31M shares, 17.19%), and Vanguard group (18.01M shares, 10.91%). Together, they hold 45.43% 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?

Commodore capital lp is Alkermes’s biggest shareholder by percentage of total assets invested, with 8.59% of its assets in 4.2M Alkermes shares, valued at 148.51M$.

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.

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