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Alnylam Pharmaceuticals (ALNY) Institutional Ownership

Alnylam Pharmaceuticals logo
$248.68 +1.17 (+0.47%)
Closing price 09/11/2026 04:00 PM Eastern
Extended Trading
$250.12 +1.44 (+0.58%)
As of 09/11/2026 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 Alnylam Pharmaceuticals (NASDAQ:ALNY)

Current
Institutional Ownership
Percentage
92.97%
Number of
Institutional Buyers
(last 12 months)
568
Total
Institutional Inflows
(last 12 months)
$25.70B
Number of
Institutional Sellers
(last 12 months)
310
Total
Institutional Outflows
(last 12 months)
$88.87B
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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
9/9/2026 Sequoia Financial Advisors LLC4,347$1.31M0.0%-4.7%0.003%
9/9/2026 Tidal Investments LLC33,541$10.10M0.0%-42.1%0.025%
9/9/2026 National Pension Service198,295$59.69M0.0%+7.9%0.148%
9/9/2026 WINTON GROUP Ltd7,880$2.37M0.1%N/A0.006%
9/9/2026 Engineers Gate Manager LP33,469$10.08M0.1%+3.0%0.025%
9/9/2026 Integrated Wealth Concepts LLC4,467$1.35M0.0%-16.9%0.003%
9/9/2026 NewEdge Advisors LLC2,570$774K0.0%+11.0%0.002%
9/9/2026 Beacon Investment Advisory Services Inc.99$30K0.0%-52.9%0.000%
9/8/2026 Allworth Financial LP1,099$331K0.0%-14.3%0.001%
9/8/2026 Arizona State Retirement System38,025$11.45M0.1%+5.9%0.028%
9/8/2026 West Family Investments Inc.767$231K0.1%N/A0.001%
9/8/2026 Waverly Advisors LLC823$248K0.0%-9.3%0.001%
9/8/2026 Nykredit A S43,641$13.14M0.0%N/A0.033%
8/27/2026 Corient Private Wealth LP23,969$7.22M0.0%-6.8%0.018%
8/26/2026 HighTower Advisors LLC105,045$31.62M0.0%-0.8%0.079%
8/25/2026 VIRGINIA RETIREMENT SYSTEMS ET Al3,980$1.20M0.0%N/A0.003%
8/24/2026 California State Teachers Retirement System60,164,157$18.11B0.0%+30,461.4%44.962%
8/23/2026 Wedmont Private Capital1,413$422K0.0%+15.6%0.001%
8/23/2026 HB Wealth Management LLC1,824$549K0.0%-8.6%0.001%
8/23/2026 Saudi Central Bank9,284$2.80M0.0%+90.4%0.007%
8/22/2026 AlphaGrep UK Ltd1,623$489K0.1%N/A0.001%
8/22/2026 Raiffeisen Bank International AG13,510$3.97M0.0%+29.7%0.010%
8/22/2026 denkapparat Operations GmbH2,594$781K0.3%+151.4%0.002%
8/22/2026 TD Waterhouse Canada Inc.1,825$551K0.0%-7.4%0.001%
8/22/2026 Concurrent Investment Advisors LLC7,521$2.26M0.0%+695.9%0.006%
8/22/2026 NEOS Investment Management LLC78,274$23.56M0.1%+13.6%0.058%
8/21/2026 Orion Capital Management LLC2,155$649K0.2%-24.5%0.002%
8/21/2026 Nykredit A S51,208$15.42M0.0%N/A0.038%
8/21/2026 B. Metzler seel. Sohn & Co. AG10,591$3.19M0.0%+25.0%0.008%
8/20/2026 Proficio Capital Partners LLC919$277K0.0%N/A0.001%
8/20/2026 Quantitative Investment Management LLC7,981$2.40M0.3%+106.9%0.006%
8/20/2026 Two Sigma Securities LLC5,585$1.68M0.1%N/A0.004%
8/20/2026 Benjamin Edwards Inc.1,168$352K0.0%+7.6%0.001%
8/20/2026 GTS Securities LLC1,452$437K0.0%+38.0%0.001%
8/20/2026 Northwestern Mutual Wealth Management Co.1,151$346K0.0%+25.7%0.001%
8/19/2026 UBS AM a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC727,848$219.10M0.0%+7.4%0.544%
8/19/2026 Royal London Asset Management Ltd.213,589$64.30M0.1%-0.7%0.160%
8/19/2026 Van ECK Associates Corp58,666$17.66M0.0%+8.4%0.044%
8/19/2026 Nissay Asset Management Corp Japan39,482$11.89M0.1%+7.0%0.030%
8/19/2026 Wellington Management Group LLP2,110,407$635.30M0.1%+9.0%1.577%
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8/18/2026 Beacon Pointe Advisors LLC1,144$344K0.0%N/A0.001%
8/18/2026 Livforsakringsbolaget Skandia Omsesidigt1,000$301K0.0%N/A0.001%
8/18/2026 Rakuten Investment Management Inc.17,961$5.27M0.0%N/A0.013%
8/18/2026 Orion Capital Management LLC2,155$649K0.2%N/A0.002%
8/18/2026 North Star Asset Management Inc.1,105$333K0.0%N/A0.001%
8/18/2026 Empowered Funds LLC4,355$1.31M0.0%N/A0.003%
8/18/2026 United Capital Financial Advisors LLC4,155$1.25M0.0%N/A0.003%
8/18/2026 Coastal Bridge Advisors LLC941$283K0.0%N/A0.001%
8/18/2026Jefferies Financial Group Inc.22,095$6.65M0.0%N/A0.017%
8/18/2026 Public Employees Retirement System of Ohio37,998$11.44M0.0%N/A0.028%
8/18/2026 MASTERINVEST Kapitalanlage GmbH1,251$377K0.0%N/A0.001%
8/17/2026 Capstone Investment Advisors LLC1,899$572K0.0%N/A0.001%
8/17/2026 Proficio Capital Partners LLC919$277K0.0%N/A0.001%
8/17/2026 Transamerica Financial Advisors LLC8,288$2.50M0.2%N/A0.006%
8/17/2026 Corient Private Wealth LP23,797$7.16M0.0%N/A0.018%
8/15/2026 Strategic Global Advisors LLC4,823$1.45M0.2%N/A0.004%
8/15/2026 Caisse de depot et placement du Quebec85,748$25.81M0.0%N/A0.064%
8/15/2026 Man Group plc170,907$51.45M0.1%N/A0.128%
8/15/2026 Jupiter Topco LLC135,545$40.81M0.0%N/A0.101%
8/14/2026 Canada Pension Plan Investment Board334,246$100.62M0.1%N/A0.250%
8/14/2026 Parkman Healthcare Partners LLC50,672$15.25M1.6%N/A0.038%
8/14/2026 Legal & General Group Plc924,561$278.32M0.1%N/A0.691%
8/14/2026 Brandywine Managers LLC2,318$698K0.3%N/A0.002%
8/14/2026 L2 Asset Management LLC768$231K0.0%N/A0.001%
8/13/2026 Cibc World Market Inc.7,221$2.17M0.0%N/A0.005%
8/13/2026 OMERS ADMINISTRATION Corp4,517$1.36M0.0%N/A0.003%
8/13/2026 Osmosis Investment Management UK Ltd3,638$1.10M0.1%N/A0.003%
8/13/2026 Sanctuary Advisors LLC3,139$945K0.0%N/A0.002%
8/13/2026 Polymer Capital Management HK LTD64,957$19.55M1.0%N/A0.049%
8/13/2026 Connor Clark & Lunn Investment Management Ltd.666$200K0.0%N/A0.000%
8/13/2026 Meiji Yasuda Asset Management Co Ltd.1,085$327K0.0%N/A0.001%
8/13/2026 Bank of Nova Scotia8,130$2.45M0.0%N/A0.006%
8/12/2026 Elevation Point Wealth Partners LLC1,316$396K0.0%N/A0.001%
8/12/2026 Daiichi Life Insurance Co. Ltd.5,873$1.77M0.0%N/A0.004%
8/12/2026 Commerce Bank9,461$2.85M0.0%N/A0.007%
8/12/2026 Northwestern Mutual Wealth Management Co.1,151$346K0.0%N/A0.001%
8/12/2026 Evolve Private Wealth LLC882$266K0.0%N/A0.001%
8/12/2026 Westpac Banking Corp2,632$792K0.0%N/A0.002%
8/12/2026 Sumitomo Life Insurance Co.3,111$937K0.0%N/A0.002%
8/12/2026 Korea Investment CORP247,660$74.55M0.1%N/A0.185%
8/12/2026 EP Wealth Advisors LLC791$238K0.0%N/A0.001%
8/12/2026 Ieq Capital LLC15,410$4.64M0.0%N/A0.012%
8/12/2026 Callan Family Office LLC3,078$927K0.0%N/A0.002%
8/11/2026 Keating Financial Advisory Services Inc.139$42K0.0%N/A0.000%
8/11/2026 Allworth Financial LP1,099$331K0.0%N/A0.001%
8/11/2026 B. Metzler seel. Sohn & Co. AG10,591$3.19M0.0%N/A0.008%
8/11/2026 Silvant Capital Management LLC18,126$5.46M0.2%N/A0.014%
8/11/2026 Vise Technologies Inc.1,242$374K0.0%N/A0.001%
8/11/2026 E Fund Management Co. Ltd.6,073$1.83M0.0%N/A0.005%
8/11/2026 Asahi Life Asset Management CO. LTD.1,388$418K0.2%N/A0.001%
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8/10/2026 Shepherd Financial Partners LLC2,741$825K0.1%N/A0.002%
8/10/2026 West Family Investments Inc.767$231K0.1%N/A0.001%
8/10/2026 NewEdge Wealth LLC9,094$2.74M0.0%N/A0.007%
8/10/2026 Danske Bank A S64,555$19.43M0.0%N/A0.048%
8/8/2026 Wealthfront Advisers LLC9,554$2.88M0.0%N/A0.007%
8/8/2026 Meeder Advisory Services Inc.1,611$485K0.0%N/A0.001%
8/8/2026 Meeder Asset Management Inc.1,570$473K0.0%N/A0.001%
8/7/2026 Citizens Financial Group Inc. RI3,682$1.11M0.0%N/A0.003%
8/7/2026 Grandfield & Dodd LLC3,204$964K0.1%N/A0.002%
8/7/2026 Pallas Capital Advisors LLC2,203$663K0.0%N/A0.002%


ALNY Institutional Ownership - Frequently Asked Questions

During the previous two years, 833 institutional investors and hedge funds held shares of Alnylam Pharmaceuticals. The most heavily invested institutionals were California State Teachers Retirement System ($18.11B), Capital World Investors ($6.48B), Vanguard Group Inc. ($5.39B), Capital Research Global Investors ($2.70B), Geode Capital Management LLC ($1.06B), Baillie Gifford & Co. ($1.03B), and Norges Bank ($895.82M).Learn more on Alnylam Pharmaceuticals' institutional investors.

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

Of the 753 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: California State Teachers Retirement System ($59.98M), Norges Bank ($6.74M), Regeneron Pharmaceuticals Inc. ($4.44M), Groupama Asset Managment ($2.51M), Capital Research Global Investors ($1.76M), Arrowstreet Capital Limited Partnership ($1.35M), and T. Rowe Price Investment Management Inc. ($1.28M).

Institutional investors have bought a total of 78,895,841 shares in the last 24 months. This purchase volume represents approximately $25.70B in transactions.

Of the 310 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: Deerfield Management Company L.P. ($110.08M), Invesco Ltd. ($45.50M), Ameriprise Financial Inc. ($4.47M), Groupama Asset Managment ($4.00M), Amundi ($3.21M), Regeneron Pharmaceuticals Inc. ($3.05M), and Man Group plc ($2.85M).

Institutional investors have sold a total of 197,368,470 shares in the last 24 months. This volume of shares sold represents approximately $88.87B in transactions.


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