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Ionis Pharmaceuticals (IONS) Institutional Ownership

Ionis Pharmaceuticals logo
$43.03 +0.05 (+0.12%)
Closing price 08/1/2025 04:00 PM Eastern
Extended Trading
$42.98 -0.05 (-0.10%)
As of 08/1/2025 07:23 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 Ionis Pharmaceuticals (NASDAQ:IONS)

Current
Institutional Ownership
Percentage
93.86%
Number of
Institutional Buyers
(last 12 months)
156
Total
Institutional Inflows
(last 12 months)
$701.62M
Number of
Institutional Sellers
(last 12 months)
119
Total
Institutional Outflows
(last 12 months)
$2.48B
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IONS Institutional Buying and Selling by Quarter

Ionis Pharmaceuticals Major Shareholders & Ownership History

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Reporting DateMajor Shareholder NameShares HeldMarket Value% of PortfolioQuarterly Change in SharesOwnership in CompanyDetails
8/1/2025IQ EQ FUND MANAGEMENT IRELAND Ltd13,263$524K0.0%+64.6%0.008%
8/1/2025Teacher Retirement System of Texas668,273$26.40M0.1%+33.5%0.420%
8/1/2025Y Intercept Hong Kong Ltd37,649$1.49M0.0%N/A0.024%
8/1/2025Envestnet Asset Management Inc.13,544$535K0.0%-9.9%0.009%
7/31/2025 State of New Jersey Common Pension Fund D58,918$2.33M0.0%-2.9%0.037%
7/31/2025 Sumitomo Mitsui Trust Group Inc.139,739$5.52M0.0%-1.9%0.088%
7/30/2025 Bleakley Financial Group LLC18,129$716K0.0%-18.6%0.011%
7/30/2025 ARK Investment Management LLC900,318$35.57M0.3%-10.0%0.566%
7/29/2025 Tweedy Browne Co LLC2,891,948$114.26M10.6%-3.1%1.817%
7/28/2025 TD Asset Management Inc1,104,690$43.65M0.0%+0.4%0.694%
7/25/2025 Vanguard Personalized Indexing Management LLC12,072$477K0.0%+17.1%0.008%
7/24/2025 Aberdeen Group plc406,694$16.25M0.0%-8.9%0.256%
7/24/2025 IFP Advisors Inc904$36K0.0%-21.4%0.001%
7/24/2025 Callan Family Office LLC5,400$213K0.0%N/A0.003%
7/24/2025 Blair William & Co. IL37,891$1.50M0.0%-1.3%0.024%
7/23/2025 Castle Rock Wealth Management LLC5,122$215K0.1%N/A0.003%
7/23/2025 KLP Kapitalforvaltning AS31,500$1.25M0.0%+15.0%0.020%
7/22/2025 DAVENPORT & Co LLC64,843$2.56M0.0%+15.0%0.041%
7/21/2025 Mirae Asset Global Investments Co. Ltd.6,148$243K0.0%+15.6%0.004%
7/18/2025 Sicart Associates LLC185,296$7.32M2.5%-0.2%0.116%
7/16/2025 Signaturefd LLC2,030$80K0.0%+46.9%0.001%
7/15/2025 Significant Wealth Partners LLC15,504$613K0.3%+14.0%0.010%
7/15/2025 Fifth Third Bancorp7,598$300K0.0%-23.9%0.005%
7/11/2025 Assenagon Asset Management S.A.17,654$698K0.0%N/A0.011%
7/10/2025 Wedmont Private Capital5,282$226K0.0%N/A0.003%
7/10/2025 Sovran Advisors LLC321,913$13.31M1.4%-2.1%0.202%
7/8/2025 Parallel Advisors LLC1,872$74K0.0%+151.3%0.001%
5/29/2025Rhumbline Advisers188,216$5.68M0.0%-1.9%0.118%
5/20/2025Focus Partners Wealth9,832$297K0.0%+30.1%0.006%
5/19/2025UBS AM A Distinct Business Unit of UBS Asset Management Americas LLC659,435$19.90M0.0%+6.4%0.414%
5/16/2025Exome Asset Management LLC135,616$4.09M3.5%+121.0%0.085%
5/16/2025Goldman Sachs Group Inc.652,518$19.69M0.0%+72.5%0.410%
5/16/2025Teza Capital Management LLC10,244$309K0.1%+20.2%0.006%
5/16/2025Millennium Management LLC635,370$19.17M0.0%-17.9%0.399%
5/16/2025MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd.8,206$256K0.0%-13.2%0.005%
5/16/2025Edmond DE Rothschild Holding S.A.124,200$3.75M0.1%N/A0.078%
5/16/2025BVF Inc. IL1,913,385$57.73M2.4%N/A1.202%
5/16/2025Allostery Investments LP35,000$1.06M1.5%-46.2%0.022%
5/16/2025Ancora Advisors LLC2,000$60K0.0%N/A0.001%
5/16/2025Adage Capital Partners GP L.L.C.1,075,600$32.45M0.1%+291.1%0.676%
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5/15/2025Baker BROS. Advisors LP357,915$10.80M0.1%-98.8%0.225%
5/15/2025PDT Partners LLC96,056$2.90M0.2%+231.3%0.060%
5/15/2025Alpine Global Management LLC28,097$848K0.2%N/A0.018%
5/15/2025Quarry LP3,000$91K0.0%-50.0%0.002%
5/15/2025Tema Etfs LLC25,141$759K0.2%-55.8%0.016%
5/15/2025Orion Investment Co215,290$6.50M2.7%-0.3%0.135%
5/14/2025Rafferty Asset Management LLC176,248$5.32M0.0%-25.7%0.111%
5/14/2025FORA Capital LLC11,570$349K0.0%N/A0.007%
5/14/2025Comerica Bank1,320$40K0.0%-82.1%0.001%
5/14/2025Jump Financial LLC81,321$2.45M0.0%+104.6%0.051%
5/14/2025Northwestern Mutual Wealth Management Co.12,358$373K0.0%+9.1%0.008%
5/14/2025Price T Rowe Associates Inc. MD3,265,034$98.51M0.0%-14.7%2.051%
5/14/2025Candriam S.C.A.993,704$29.98M0.2%+16.9%0.624%
5/14/2025T. Rowe Price Investment Management Inc.16,175,533$488.02M0.3%+14.2%10.163%
5/14/2025Capital Fund Management S.A.58,014$1.75M0.0%N/A0.036%
5/14/2025Groupama Asset Managment1,069,211$32.26M0.3%+5.1%0.672%
5/14/2025Hsbc Holdings PLC74,833$2.22M0.0%-9.9%0.047%
5/13/2025Northern Trust Corp834,847$25.19M0.0%-0.6%0.525%
5/13/2025Raymond James Financial Inc.148,690$4.49M0.0%+40.8%0.093%
5/13/2025Tocqueville Asset Management L.P.187,395$5.65M0.1%-46.8%0.118%
5/13/2025American Century Companies Inc.116,768$3.52M0.0%N/A0.073%
5/13/2025 Sector Gamma AS285,842$8.62M2.8%+21.2%0.180%
5/13/2025 Aberdeen Group plc446,197$13.50M0.0%+11.1%0.280%
5/13/2025Liontrust Investment Partners LLP30,390$917K0.0%-27.0%0.019%
5/13/2025E Fund Management Co. Ltd.16,471$497K0.0%-2.4%0.010%
5/12/2025Connor Clark & Lunn Investment Management Ltd.129,273$3.90M0.0%+3.1%0.081%
5/12/2025Swiss National Bank275,300$8.31M0.0%-1.4%0.173%
5/12/2025Mitsubishi UFJ Asset Management Co. Ltd.6,135$185K0.0%+8.5%0.004%
5/9/2025Charles Schwab Investment Management Inc.1,443,629$43.55M0.0%-2.6%0.907%
5/9/2025Vanguard Group Inc.16,383,934$494.30M0.0%-0.5%10.294%
5/9/2025IQ EQ FUND MANAGEMENT IRELAND Ltd8,059$243K0.0%N/A0.005%
5/9/2025Raiffeisen Bank International AG41,754$1.30M0.0%+2,280.5%0.026%
5/9/2025 Blair William & Co. IL38,381$1.16M0.0%-3.8%0.024%
5/9/2025 Privium Fund Management B.V.267,594$8.07M2.1%+0.3%0.168%
5/8/2025Commerce Bank7,275$219K0.0%-46.4%0.005%
5/8/2025Jefferies Financial Group Inc.22,841$689K0.0%-99.2%0.014%
5/8/2025XTX Topco Ltd12,404$374K0.0%-51.1%0.008%
5/7/2025 ARK Investment Management LLC1,000,527$30.19M0.3%-2.4%0.629%
5/7/2025 TD Asset Management Inc1,100,466$33.20M0.0%+4.8%0.691%
5/7/2025Nikko Asset Management Americas Inc.142,433$4.30M0.1%-9.1%0.089%
5/6/2025Pinnacle Associates Ltd.608,517$18.36M0.3%+11.1%0.383%
5/6/2025Readystate Asset Management LP46,394$1.40M0.0%-99.6%0.029%
5/6/2025 KLP Kapitalforvaltning AS27,400$827K0.0%-6.2%0.017%
5/5/2025GW&K Investment Management LLC182,309$5.50M0.1%-2.6%0.115%
5/5/2025Private Advisor Group LLC34,531$1.04M0.0%-15.1%0.022%
5/2/2025Grandfield & Dodd LLC37,761$1.14M0.1%+5.2%0.024%
5/2/2025Victory Capital Management Inc.18,641$562K0.0%+3.5%0.012%
5/2/2025 Signaturefd LLC1,382$42K0.0%+45.6%0.001%
5/1/2025 Bleakley Financial Group LLC22,284$672K0.0%+31.5%0.014%
5/1/2025 CWM LLC2,435$73K0.0%+18.7%0.002%
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5/1/2025 Westmount Partners LLC12,961$391K0.1%-3.7%0.008%
5/1/2025Arizona State Retirement System40,687$1.23M0.0%-1.1%0.026%
5/1/2025Xponance Inc.20,319$613K0.0%+5.1%0.013%
4/30/2025 Significant Wealth Partners LLC13,605$410K0.2%+24.8%0.009%
4/30/2025Brown Advisory Inc.12,026$363K0.0%-5.5%0.008%
4/30/2025China Universal Asset Management Co. Ltd.31,886$962K0.1%-4.8%0.020%
4/29/2025Envestnet Asset Management Inc.15,039$454K0.0%-71.5%0.009%
4/29/2025 GF Fund Management CO. LTD.4,042$122K0.0%+21.9%0.003%
4/28/2025Principal Financial Group Inc.10,447$315K0.0%-23.3%0.007%
4/28/2025Teacher Retirement System of Texas500,451$15.10M0.1%+660.7%0.315%
(Data available from 1/1/2016 forward)

IONS Institutional Ownership - Frequently Asked Questions

Who are the largest shareholders of IONS shares?

During the previous two years, 300 institutional investors and hedge funds held shares of Ionis Pharmaceuticals. The most heavily invested institutionals were FMR LLC ($975.19M), Vanguard Group Inc. ($494.30M), T. Rowe Price Investment Management Inc. ($488.02M), Capital World Investors ($400.83M), Bellevue Group AG ($275.09M), Wellington Management Group LLP ($233.57M), and Tweedy Browne Co LLC ($114.26M).Learn more on Ionis Pharmaceuticals' institutional investors.

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

93.86% of Ionis Pharmaceuticals' stock is owned by institutional investors. Learn more on IONS's institutional investor holdings.

Which institutional investors have been buying Ionis Pharmaceuticals' stock?

Of the 231 institutional investors that purchased Ionis Pharmaceuticals' stock in the last 24 months, the following investors and hedge funds have bought the highest volume of shares: Capital World Investors ($4.48M), Wellington Management Group LLP ($3.70M), Norges Bank ($2.89M), BVF Inc. IL ($2.20M), T. Rowe Price Investment Management Inc. ($2.01M), Adage Capital Partners GP L.L.C. ($1.87M), and Vanguard Group Inc. ($1.42M).

How much institutional buying is happening at Ionis Pharmaceuticals?

Institutional investors have bought a total of 20,336,829 shares in the last 24 months. This purchase volume represents approximately $701.62M in transactions.

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

Of the 117 institutional investors that sold Ionis Pharmaceuticals' stock in the last 24 months, the following investors and hedge funds have sold the highest volume of shares: Baker BROS. Advisors LP ($30M), Readystate Asset Management LP ($11.95M), Nuveen Asset Management LLC ($9.01M), Schroder Investment Management Group ($4.83M), Jefferies Financial Group Inc. ($2.70M), Clearbridge Investments LLC ($2.39M), and Artisan Partners Limited Partnership ($1.99M).

How much institutional selling is happening at Ionis Pharmaceuticals?

Institutional investors have sold a total of 75,314,593 shares in the last 24 months. This volume of shares sold represents approximately $2.48B in transactions.


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This page (NASDAQ:IONS) was last updated on 8/2/2025 by MarketBeat.com Staff
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