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Alnylam Pharmaceuticals (ALNY) Institutional Ownership

Alnylam Pharmaceuticals logo
$459.66 +2.71 (+0.59%)
Closing price 10/10/2025 03:59 PM Eastern
Extended Trading
$445.52 -14.14 (-3.08%)
As of 10/10/2025 07:45 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 Polygon.io. Learn more.
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Institutional Ownership Changes (13F Filings) for Alnylam Pharmaceuticals (NASDAQ:ALNY)

Current
Institutional Ownership
Percentage
92.97%
Number of
Institutional Buyers
(last 12 months)
417
Total
Institutional Inflows
(last 12 months)
$6.05B
Number of
Institutional Sellers
(last 12 months)
253
Total
Institutional Outflows
(last 12 months)
$5.28B
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ALNY Institutional Buying and Selling by Quarter

Alnylam Pharmaceuticals Major Shareholders & Ownership History

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Reporting DateMajor Shareholder NameShares HeldMarket Value% of PortfolioQuarterly Change in SharesOwnership in CompanyDetails
10/10/2025 Congress Asset Management Co.118,800$54.17M0.4%N/A0.091%
10/9/2025 U.S. Capital Wealth Advisors LLC27,544$12.56M0.3%-47.1%0.021%
10/9/2025 Riversedge Advisors LLC471$215K0.0%N/A0.000%
10/8/2025 Hilltop National Bank91$41K0.0%N/A0.000%
10/8/2025 Fiduciary Alliance LLC533$243K0.0%N/A0.000%
10/8/2025 Wedmont Private Capital1,055$485K0.0%-40.1%0.001%
10/7/2025 Cooper Financial Group597$272K0.0%N/A0.000%
10/7/2025 Orser Capital Management LLC1,544$704K0.4%N/A0.001%
10/7/2025 ST Germain D J Co. Inc.8,151$3.72M0.1%-9.4%0.006%
10/7/2025 Assenagon Asset Management S.A.80,381$36.65M0.1%+354.5%0.061%
10/7/2025 Sanders Morris Harris LLC3,150$1.44M0.2%N/A0.002%
10/3/2025 Aaron Wealth Advisors LLC1,109$506K0.0%N/A0.001%
10/2/2025 GAMMA Investing LLC823$375K0.0%+13.4%0.001%
9/26/2025Corient Private Wealth LLC42,152$13.75M0.0%-1.2%0.032%
9/4/2025Osaic Holdings Inc.3,787$1.20M0.0%+132.5%0.003%
8/28/2025China Universal Asset Management Co. Ltd.27,817$9.07M0.9%-10.2%0.021%
8/27/2025Orion Porfolio Solutions LLC4,309$1.41M0.0%+11.7%0.003%
8/20/2025Kentucky Retirement Systems8,253$2.69M0.1%-6.2%0.006%
8/20/2025Kentucky Retirement Systems Insurance Trust Fund3,503$1.14M0.1%-6.5%0.003%
8/19/2025Advisory Services Network LLC6,415$2.09M0.0%-52.5%0.005%
8/19/2025Liontrust Investment Partners LLP12,769$4.16M0.1%-32.4%0.010%
8/18/2025Hudson Bay Capital Management LP15,348$5.01M0.0%-138.4%0.012%
8/15/2025CANADA LIFE ASSURANCE Co91,154$29.73M0.0%+8.7%0.070%
8/15/2025Corient Private Wealth LLC42,250$13.78M0.0%-1.0%0.032%
8/15/2025Ewing Morris & Co. Investment Partners Ltd.1,440$470K0.2%N/A0.001%
8/15/2025E Fund Management Co. Ltd.3,594$1.17M0.1%-71.7%0.003%
8/15/2025Captrust Financial Advisors3,506$1.14M0.0%-45.1%0.003%
8/15/2025Soleus Capital Management L.P.106,750$34.81M2.3%N/A0.081%
8/15/2025Vident Advisory LLC3,925$1.28M0.0%+47.2%0.003%
8/15/2025Voleon Capital Management LP1,356$442K0.0%-88.6%0.001%
8/15/2025Tidal Investments LLC5,574$1.82M0.0%-9.0%0.004%
8/15/2025Smartleaf Asset Management LLC594$192K0.0%-33.6%0.000%
8/15/2025Snowden Capital Advisors LLC1,136$370K0.0%+37.0%0.001%
8/15/2025Royal London Asset Management Ltd.259,071$84.48M0.2%-9.7%0.198%
8/15/2025Rafferty Asset Management LLC32,196$10.50M0.0%-27.8%0.025%
8/15/2025Oxford Asset Management LLP2,468$805K0.3%N/A0.002%
8/15/2025Orbis Allan Gray Ltd2,121,412$691.77M3.4%+29.8%1.618%
8/15/2025Orion Porfolio Solutions LLC4,309$1.41M0.0%+11.7%0.003%
8/15/2025MML Investors Services LLC17,838$5.82M0.0%+38.0%0.014%
8/15/2025HRT Financial LP17,887$5.83M0.0%-67.6%0.014%
8/15/2025Holocene Advisors LP596,816$194.62M0.5%N/A0.455%
8/15/2025Hudson Bay Capital Management LP15,348$5.01M0.0%-138.4%0.012%
8/15/2025Humankind Investments LLC896$292K0.1%N/A0.001%
8/15/2025ICONIQ Capital LLC806$263K0.0%N/A0.001%
8/15/2025Gilder Gagnon Howe & Co. LLC337,088$109.92M1.2%-2.5%0.257%
8/15/2025EP Wealth Advisors LLC713$233K0.0%-28.6%0.001%
8/15/2025Eventide Asset Management LLC125,902$41.05M0.7%-24.4%0.096%
8/15/2025Engineers Gate Manager LP32,630$10.64M0.1%+28.5%0.025%
8/15/2025BI Asset Management Fondsmaeglerselskab A S6,912$2.25M0.0%+29.4%0.005%
8/15/2025Boothbay Fund Management LLC19,213$6.27M0.1%+90.4%0.015%
8/15/2025Brandywine Managers LLC4,218$1.38M1.4%-3.0%0.003%
8/15/2025BRITISH COLUMBIA INVESTMENT MANAGEMENT Corp20,471$6.68M0.0%-17.0%0.016%
8/15/2025Bellevue Group AG676,367$220.56M4.9%-11.9%0.516%
8/15/2025Adage Capital Partners GP L.L.C.84,390$27.52M0.0%-70.1%0.064%
8/15/2025AQR Capital Management LLC188,249$61.28M0.1%-77.3%0.144%
8/14/2025Orbimed Advisors LLC341,900$111.49M3.0%-1.2%0.261%
8/14/2025California State Teachers Retirement System199,316$65.00M0.1%+0.9%0.152%
8/14/2025Worldquant Millennium Advisors LLC117,373$38.27M0.2%-38.6%0.090%
8/14/2025Canada Pension Plan Investment Board35,520$11.58M0.0%-41.3%0.027%
8/14/2025Quantinno Capital Management LP13,464$4.39M0.0%+109.3%0.010%
8/14/2025MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd.11,558$3.76M0.0%-17.2%0.009%
8/14/2025Alliancebernstein L.P.67,131$21.89M0.0%+49.7%0.051%
8/14/2025Ieq Capital LLC6,122$2.00M0.0%-86.1%0.005%
8/14/2025Treasurer of the State of North Carolina58,304$19.01M0.1%-1.1%0.044%
8/14/2025Nebula Research & Development LLC900$293K0.0%N/A0.001%
8/14/2025Frontier Capital Management Co. LLC103,003$33.59M0.3%+0.6%0.079%
8/14/2025NewEdge Advisors LLC704$229K0.0%+70,300.0%0.001%
8/14/2025Investment Management Corp of Ontario31,521$10.28M0.1%+35.4%0.024%
8/14/2025Daiwa Securities Group Inc.12,941$4.22M0.0%+0.3%0.010%
8/14/2025Prestige Wealth Management Group LLC184$60K0.0%-41.8%0.000%
8/14/2025Thematics Asset Management6,118$2.00M0.1%N/A0.005%
8/14/2025Winslow Capital Management LLC1,177,439$383.95M1.3%-0.8%0.898%
8/14/2025WINTON GROUP Ltd3,533$1.15M0.1%N/A0.003%
8/14/2025Bank of Nova Scotia2,679$874K0.0%-40.5%0.002%
8/14/2025California Public Employees Retirement System211,581$68.99M0.0%+5.0%0.161%
8/14/2025Cerity Partners LLC10,113$3.30M0.0%-30.9%0.008%
8/14/2025Federated Hermes Inc.323,842$105.60M0.2%+22.6%0.247%
8/13/2025Jump Financial LLC17,177$5.60M0.1%+9.3%0.013%
8/13/2025Rosenblum Silverman Sutton S F Inc. CA34,392$11.22M2.7%-0.7%0.026%
8/13/2025Flow Traders U.S. LLC740$241K0.0%N/A0.001%
8/13/2025Tema Etfs LLC5,301$1.73M0.5%-18.1%0.004%
8/13/2025Brown Advisory Inc.29,471$9.61M0.0%-6.1%0.022%
8/13/2025SCS Capital Management LLC170,662$55.65M0.6%-0.2%0.130%
8/13/2025Marshall Wace LLP238,573$77.80M0.1%-11.3%0.182%
8/13/2025Mirabella Financial Services LLP2,970$973K0.1%-74.7%0.002%
8/13/2025Dodge & Cox3,197,096$1.04B0.6%-4.6%2.439%
8/13/2025First Trust Advisors LP251,817$82.12M0.1%+39.5%0.192%
8/13/2025Kennedy Capital Management LLC1,668$544K0.0%+8.2%0.001%
8/13/2025Guggenheim Capital LLC10,649$3.47M0.0%-13.9%0.008%
8/13/20251832 Asset Management L.P.223,345$72.83M0.1%+55.1%0.170%
8/13/2025Beacon Pointe Advisors LLC1,036$338K0.0%+19.5%0.001%
8/13/2025Arrowstreet Capital Limited Partnership169,700$55.34M0.0%+4,085.0%0.129%
8/13/2025M&T Bank Corp8,203$2.67M0.0%+4.3%0.006%
8/13/2025Panagora Asset Management Inc.92,499$30.16M0.1%-4.4%0.071%
8/13/2025New York State Common Retirement Fund63,272$20.63M0.0%-1.6%0.048%
8/13/2025West Family Investments Inc.822$268K0.1%N/A0.001%
8/13/2025Schroder Investment Management Group8,580$2.80M0.0%-69.1%0.007%
8/13/2025Mackenzie Financial Corp9,075$2.96M0.0%-4.3%0.007%
8/13/2025Loomis Sayles & Co. L P487,328$158.91M0.2%-2.2%0.372%
8/13/2025Skandinaviska Enskilda Banken AB publ 84,888$27.68M0.1%-1.4%0.065%
(Data available from 1/1/2016 forward)

ALNY Institutional Ownership - Frequently Asked Questions

Who are the largest shareholders of ALNY shares?

During the previous two years, 612 institutional investors and hedge funds held shares of Alnylam Pharmaceuticals. The most heavily invested institutionals were Vanguard Group Inc. ($4.34B), Capital World Investors ($3.91B), Capital Research Global Investors ($1.64B), T. Rowe Price Investment Management Inc. ($1.19B), Wellington Management Group LLP ($1.14B), Regeneron Pharmaceuticals Inc. ($1.05B), and Dodge & Cox ($1.04B).Learn more on Alnylam Pharmaceuticals' institutional investors.

What percentage of Alnylam Pharmaceuticals' stock is owned by institutional investors?

92.97% of Alnylam Pharmaceuticals' stock is owned by institutional investors. Learn more on ALNY's institutional investor holdings.

Which institutional investors have been buying Alnylam Pharmaceuticals' stock?

Of the 521 institutional investors that purchased Alnylam Pharmaceuticals' stock in the last 24 months, the following investors and hedge funds have bought the highest volume of shares: Norges Bank ($6.53M), Regeneron Pharmaceuticals Inc. ($4.44M), Capital Research Global Investors ($2.09M), T. Rowe Price Investment Management Inc. ($1.28M), Vanguard Group Inc. ($1.03M), Orbis Allan Gray Ltd ($648.61K), and Holocene Advisors LP ($596.82K).

How much institutional buying is happening at Alnylam Pharmaceuticals?

Institutional investors have bought a total of 23,108,120 shares in the last 24 months. This purchase volume represents approximately $6.05B in transactions.

Which of Alnylam Pharmaceuticals' major shareholders have been selling company stock?

Of the 253 institutional investors that sold Alnylam Pharmaceuticals' stock in the last 24 months, the following investors and hedge funds have sold the highest volume of shares: New York State Common Retirement Fund ($3.74M), Capital International Investors ($2.55M), Baillie Gifford & Co. ($2.38M), Jefferies Financial Group Inc. ($2.10M), UBS AM A Distinct Business Unit of UBS Asset Management Americas LLC ($1.41M), Bank of Montreal Can ($992.57K), and AQR Capital Management LLC ($640.10K).

How much institutional selling is happening at Alnylam Pharmaceuticals?

Institutional investors have sold a total of 19,040,698 shares in the last 24 months. This volume of shares sold represents approximately $5.28B in transactions.


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This page (NASDAQ:ALNY) was last updated on 10/13/2025 by MarketBeat.com Staff
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