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Ionis Pharmaceuticals (IONS) Institutional Ownership

Ionis Pharmaceuticals logo
$41.73 -0.65 (-1.53%)
Closing price 07/11/2025 04:00 PM Eastern
Extended Trading
$41.66 -0.07 (-0.18%)
As of 07/11/2025 07:54 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)
157
Total
Institutional Inflows
(last 12 months)
$695.22M
Number of
Institutional Sellers
(last 12 months)
117
Total
Institutional Outflows
(last 12 months)
$2.50B
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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
7/11/2025Assenagon 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%
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%
5/13/2025Sector Gamma AS285,842$8.62M2.8%+21.2%0.180%
5/13/2025Aberdeen Group plc446,197$13.50M0.0%+11.1%0.280%
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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%
5/9/2025Blair William & Co. IL38,381$1.16M0.0%-3.8%0.024%
5/9/2025Privium 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%
5/7/2025ARK Investment Management LLC1,000,527$30.19M0.3%-2.4%0.629%
5/7/2025TD 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%
5/6/2025KLP 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%
5/2/2025Signaturefd LLC1,382$42K0.0%+45.6%0.001%
5/1/2025Bleakley Financial Group LLC22,284$672K0.0%+31.5%0.014%
5/1/2025CWM LLC2,435$73K0.0%+18.7%0.002%
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%
4/30/2025Significant 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%
4/29/2025GF 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%
4/28/2025DAVENPORT & Co LLC56,393$1.70M0.0%-10.1%0.035%
4/25/2025 Sovran Advisors LLC328,904$9.34M1.2%+91.4%0.207%
4/25/2025Sumitomo Mitsui Trust Group Inc.142,433$4.30M0.0%-9.1%0.090%
4/22/2025Moisand Fitzgerald Tamayo LLC5,000$151K0.0%N/A0.003%
4/17/2025 Exchange Traded Concepts LLC3,244$98K0.0%+1,722.5%0.002%
4/15/2025Fifth Third Bancorp9,989$301K0.0%+4.8%0.006%
4/15/2025Handelsbanken Fonder AB43,211$1.30M0.0%-1.4%0.027%
4/15/2025SG Americas Securities LLC20,050$605K0.0%-16.2%0.013%
4/8/2025Rhumbline Advisers188,216$5.68M0.0%-1.9%0.118%
4/7/2025GAMMA Investing LLC28,993$961K0.0%+3,786.5%0.018%
3/18/2025California State Teachers Retirement System133,902$4.68M0.0%+6.1%0.084%
2/19/2025GF Fund Management CO. LTD.3,315$116K0.0%N/A0.002%
2/19/2025Public Employees Retirement System of Ohio53,748$1.88M0.0%-5.4%0.034%
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2/17/2025UBS AM a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC619,641$21.66M0.0%-40.8%0.392%
2/17/2025Voloridge Investment Management LLC316,943$11.08M0.0%-16.7%0.201%
2/17/2025Woodline Partners LP107,610$3.76M0.0%N/A0.068%
2/17/2025Vestal Point Capital LP595,000$20.80M1.2%N/A0.377%
2/17/2025Two Sigma Advisers LP1,349,211$47.17M0.1%+1.3%0.854%
2/17/2025Two Sigma Investments LP921,439$32.21M0.1%+0.3%0.584%
2/17/2025Tidal Investments LLC17,407$609K0.0%-7.9%0.011%
2/17/2025Teza Capital Management LLC8,525$298K0.0%-19.6%0.005%
2/17/2025Tanaka Capital Management Inc.6,892$241K0.6%-52.5%0.004%
2/17/2025Tema Etfs LLC56,844$1.99M0.8%N/A0.036%
(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, 302 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 ($113.58M).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 230 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 20,161,078 shares in the last 24 months. This purchase volume represents approximately $695.22M 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 75,736,887 shares in the last 24 months. This volume of shares sold represents approximately $2.50B in transactions.


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This page (NASDAQ:IONS) was last updated on 7/13/2025 by MarketBeat.com Staff
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