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Alkermes (ALKS) Institutional Ownership

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$40.61 +0.50 (+1.25%)
Closing price 10/9/2026 04:00 PM Eastern
Extended Trading
$40.64 +0.03 (+0.07%)
As of 10/9/2026 07:30 PM Eastern
Extended trading is trading that happens on electronic markets outside of regular trading hours. This is a fair market value extended hours price provided by Massive. Learn more.
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Institutional Ownership Changes (13F Filings) for Alkermes (NASDAQ:ALKS)

Current
Institutional Ownership
Percentage
95.21%
Number of
Institutional Buyers
(last 12 months)
212
Total
Institutional Inflows
(last 12 months)
$888.66M
Number of
Institutional Sellers
(last 12 months)
143
Total
Institutional Outflows
(last 12 months)
$553.88M
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ALKS Institutional Buying and Selling by Quarter

Alkermes Major Shareholders & Ownership History

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Reporting DateMajor Shareholder NameShares HeldMarket Value% of PortfolioQuarterly Change in SharesOwnership in CompanyDetails
10/9/2026GAMMA Investing LLC7,090$287K0.0%+5.7%0.004%
9/9/2026Sequoia Financial Advisors LLC8,237$432K0.0%-11.2%0.005%
9/9/2026Integrated Wealth Concepts LLC2,152$113K0.0%N/A0.001%
9/9/2026IFP Advisors Inc639$33K0.0%-54.3%0.000%
9/9/2026Squarepoint Ops LLC115,195$6.04M0.0%-58.5%0.069%
9/9/2026Baird Financial Group Inc.53,267$2.79M0.0%N/A0.032%
9/8/2026Arizona State Retirement System43,580$2.28M0.0%+1.1%0.026%
8/27/2026Corient Private Wealth LP9,234$484K0.0%-20.0%0.006%
8/25/2026VIRGINIA RETIREMENT SYSTEMS ET Al33,083$1.73M0.0%N/A0.020%
8/23/2026Ameritas Advisory Services LLC750$39K0.0%N/A0.000%
8/23/2026HB Wealth Management LLC4,208$220K0.0%N/A0.003%
8/22/2026Seven Fleet Capital Management LP23,285$1.22M0.2%-3.7%0.014%
8/22/2026Concurrent Investment Advisors LLC4,459$234K0.0%N/A0.003%
8/21/2026Hudson Portfolio Management LLC25,930$1.36M1.0%-19.6%0.015%
8/20/2026Headlands Technologies LLC14,313$750K0.1%N/A0.009%
8/19/2026Wellington Management Group LLP2,814,804$147.48M0.0%-5.2%1.678%
8/18/2026Public Employees Retirement System of Ohio5,088$267K0.0%N/A0.003%
8/12/2026C M Bidwell & Associates Ltd.1,981$104K0.0%N/A0.001%
8/6/2026S&CO Inc.244,760$12.82M0.7%N/A0.146%
7/9/2026Hennion & Walsh Asset Management Inc.47,317$2.48M0.1%N/A0.028%
7/7/2026GAMMA Investing LLC6,705$351K0.0%+24.5%0.004%
7/7/2026Harbor Investment Advisory LLC1,556$82K0.0%N/A0.001%
7/2/2026 Versant Capital Management Inc1,445$76K0.0%+33.9%0.001%
6/18/2026Pacer Advisors Inc.688,563$24.35M0.0%+2.0%0.413%
6/16/2026Empowered Funds LLC7,817$276K0.0%-87.2%0.005%
6/4/2026Seven Fleet Capital Management LP24,170$855K0.3%N/A0.015%
5/26/2026Glenmede Trust Co. NA378,090$13.37M0.1%-8.4%0.227%
5/22/2026Segall Bryant & Hamill LLC585,769$20.71M0.3%-4.8%0.351%
5/19/2026Bank of America Corp DE1,210,851$42.82M0.0%-9.2%0.726%
5/19/2026Stempoint Capital LP80,492$2.85M0.5%N/A0.048%
5/19/2026Edgestream Partners L.P.52,826$1.87M0.1%-81.9%0.032%
5/19/2026Janus Henderson Group PLC154,016$5.45M0.0%+5.6%0.092%
5/18/2026ADAR1 Capital Management LLC46,400$1.64M0.1%-27.2%0.028%
5/18/2026Amundi64,710$2.29M0.0%+99.8%0.039%
5/18/2026EverSource Wealth Advisors LLC3,278$116K0.0%+33.5%0.002%
5/18/2026California State Teachers Retirement System183,795$6.50M0.0%+23.5%0.110%
5/18/2026Royal Bank of Canada304,337$10.76M0.0%-6.5%0.183%
5/18/2026Rock Springs Capital Management LP183,986$6.51M0.4%+32.1%0.110%
5/18/2026Eagle Health Investments LP238,673$8.44M1.5%+191.8%0.143%
5/18/2026Empowered Funds LLC7,817$276K0.0%-87.2%0.005%
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5/18/2026Exome Asset Management LLC84,103$2.97M1.5%N/A0.050%
5/16/2026The Manufacturers Life Insurance Company71,415$2.53M0.0%-37.2%0.043%
5/16/2026Quantinno Capital Management LP44,932$1.59M0.0%+131.1%0.027%
5/16/2026SummitTX Capital L.P.156,259$5.53M0.2%N/A0.094%
5/16/2026ABS Direct Equity Fund LLC4,900$167K0.1%N/A0.003%
5/15/2026Commodore Capital LP4,200,000$148.51M8.6%+18.3%2.520%
5/15/2026OMERS ADMINISTRATION Corp16,516$584K0.0%+10.7%0.010%
5/15/2026Rice Hall James & Associates LLC390,344$13.80M0.8%+2.9%0.234%
5/15/2026Lombard Odier Asset Management USA Corp10,232$362K0.0%N/A0.006%
5/15/2026Affinity Asset Advisors LLC1,350,000$47.74M2.5%+35.0%0.810%
5/15/2026Entropy Technologies LP22,885$809K0.0%-64.1%0.014%
5/15/2026Spruce Street Capital LP317,992$11.24M2.7%N/A0.191%
5/14/2026Renaissance Technologies LLC6,160,428$217.83M0.3%-7.6%3.696%
5/14/2026GC Wealth Management RIA LLC16,980$600K0.0%-54.6%0.010%
5/14/2026Public Employees Retirement System of Ohio4,929$174K0.0%+413.4%0.003%
5/14/2026Knott David M Jr120,000$4.24M2.5%+26.3%0.072%
5/14/2026Sei Investments Co.153,817$5.44M0.0%-19.3%0.092%
5/14/2026State of Wyoming14,676$519K0.1%-15.4%0.009%
5/13/2026Cetera Investment Advisers14,758$522K0.0%-22.0%0.009%
5/13/2026Militia Capital Management LLC31,918$1.13M0.2%N/A0.019%
5/13/2026First Trust Advisors LP2,968,785$104.98M0.1%+104.2%1.781%
5/8/2026PNC Financial Services Group Inc.11,318$400K0.0%+9.6%0.007%
5/8/2026DUTCH ASSET Corp6,200$219K0.1%N/A0.004%
5/8/2026Summit Global Investments11,691$413K0.0%-60.6%0.007%
5/7/2026Dimensional Fund Advisors LP4,522,378$159.85M0.0%+2.5%2.720%
5/7/2026S&CO Inc.244,760$8.65M0.5%+21.3%0.147%
5/7/2026Swiss National Bank310,300$10.97M0.0%+0.4%0.187%
5/6/2026California Public Employees Retirement System328,202$11.61M0.0%+1.1%0.197%
5/6/2026Gallacher Capital Management LLC7,677$271K0.1%N/A0.005%
5/6/2026AXS Investments LLC18,850$667K0.3%-3.3%0.011%
5/6/2026Bessemer Group Inc.158,397$5.60M0.0%+0.5%0.095%
5/6/2026Allspring Global Investments Holdings LLC24,610$863K0.0%+11.5%0.015%
5/5/2026Bank of New York Mellon Corp1,036,460$36.65M0.0%-3.5%0.623%
5/5/2026Illinois Municipal Retirement Fund90,989$3.22M0.0%-0.5%0.055%
5/5/2026Sanctuary Advisors LLC9,825$347K0.0%-19.1%0.006%
5/4/2026Empirical Financial Services LLC d.b.a. Empirical Wealth Management29,805$1.05M0.0%+20.1%0.018%
5/4/2026Bleakley Financial Group LLC10,064$356K0.0%-31.7%0.006%
5/4/2026Principal Financial Group Inc.958,016$33.88M0.0%+1.1%0.576%
5/4/2026Teachers Retirement System of The State of Kentucky77,928$2.76M0.0%+18.5%0.047%
5/1/2026Sequoia Financial Advisors LLC9,272$328K0.0%+4.8%0.006%
4/30/2026Hsbc Holdings PLC48,337$1.73M0.0%+12.9%0.029%
4/30/2026Sumitomo Mitsui Trust Group Inc.13,900$492K0.0%+4.0%0.008%
4/28/2026AdvisorShares Investments LLC26,369$932K0.2%-13.8%0.016%
4/27/2026Investors Asset Management of Georgia Inc. GA ADV8,600$303K0.1%N/A0.005%
4/27/2026New York State Teachers Retirement System54,368$1.92M0.0%-29.7%0.033%
4/25/2026Strs Ohio46,900$1.66M0.0%+1.7%0.028%
4/24/2026Peregrine Capital Management LLC244,007$8.63M0.3%-4.1%0.147%
4/22/2026Pictet Asset Management Holding SA942,184$33.32M0.0%-36.2%0.567%
4/22/2026Sterling Capital Management LLC5,318$188K0.0%-34.7%0.003%
4/21/2026Louisiana State Employees Retirement System73,200$2.59M0.0%N/A0.044%
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4/20/2026Ritholtz Wealth Management45,844$1.62M0.0%-28.5%0.028%
4/20/2026Assenagon Asset Management S.A.122,127$4.32M0.0%+10.7%0.073%
4/16/2026SG Americas Securities LLC178,993$6.33M0.0%+399.0%0.108%
4/16/2026Evolve Private Wealth LLC20,401$721K0.0%+3.3%0.012%
4/16/2026Diversified Trust Co54,913$1.94M0.0%+11.9%0.033%
3/20/2026Hsbc Holdings PLC42,817$1.20M0.0%+20.4%0.026%
3/17/2026Rockefeller Capital Management L.P.1,411$39K0.0%-34.6%0.001%
3/16/2026Avoro Capital Advisors LLC1,400,000$39.17M0.4%-37.5%0.840%
3/9/2026Corient Private Wealth LLC21,932$612K0.0%-47.0%0.013%
3/9/2026EMC Capital Management2,064$58K0.0%-15.0%0.001%


ALKS Institutional Ownership - Frequently Asked Questions

During the previous two years, 388 institutional investors and hedge funds held shares of Alkermes. The most heavily invested institutionals were Vanguard Group Inc. ($503.85M), Baker BROS. Advisors LP ($280.14M), State Street Corp ($265.05M), Price T Rowe Associates Inc. MD ($251.79M), Renaissance Technologies LLC ($217.83M), RTW Investments LP ($217.36M), and Dimensional Fund Advisors LP ($159.85M).Learn more on Alkermes' institutional investors.

95.21% of Alkermes' stock is owned by institutional investors. Learn more on ALKS's institutional investor holdings.

Of the 340 institutional investors that purchased Alkermes' stock in the last 24 months, the following investors and hedge funds have bought the highest volume of shares: JPMorgan Chase & Co. ($6.13M), Norges Bank ($5.78M), Baker BROS. Advisors LP ($3.90M), Avoro Capital Advisors LLC ($2.45M), Nuveen LLC ($2.27M), Commodore Capital LP ($2.25M), and Loomis Sayles & Co. L P ($1.90M).

Institutional investors have bought a total of 29,596,916 shares in the last 24 months. This purchase volume represents approximately $888.66M in transactions.

Of the 143 institutional investors that sold Alkermes' stock in the last 24 months, the following investors and hedge funds have sold the highest volume of shares: Avoro Capital Advisors LLC ($2.34M), Wellington Management Group LLP ($1.48M), Price T Rowe Associates Inc. MD ($1.24M), Bank of America Corp DE ($1.18M), JPMorgan Chase & Co. ($908.12K), Artisan Partners Limited Partnership ($760.65K), and BNP Paribas Financial Markets ($705.15K).

Institutional investors have sold a total of 18,414,432 shares in the last 24 months. This volume of shares sold represents approximately $553.88M in transactions.


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Institutional ownership data for NASDAQ:ALKS is compiled from quarterly 13F filings submitted to the U.S. Securities and Exchange Commission (SEC), with the most recent received on 10/9/2026. New 13F filings are added each quarter as they're published.
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