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Ionis Pharmaceuticals (IONS) Institutional Ownership

Ionis Pharmaceuticals logo
$58.25 -6.02 (-9.37%)
Closing price 04:00 PM Eastern
Extended Trading
$58.13 -0.12 (-0.21%)
As of 07:59 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 Ionis Pharmaceuticals (NASDAQ:IONS)

Current
Institutional Ownership
Percentage
93.86%
Number of
Institutional Buyers
(last 12 months)
289
Total
Institutional Inflows
(last 12 months)
$2.13B
Number of
Institutional Sellers
(last 12 months)
155
Total
Institutional Outflows
(last 12 months)
$2.99B
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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
7/10/2026Handelsbanken Fonder AB383,211$30.39M0.1%+79.1%0.232%
7/8/2026 Victrix Investment Advisors3,400$270K0.1%N/A0.002%
7/8/2026 Assenagon Asset Management S.A.40,927$3.25M0.0%+21.5%0.025%
7/7/2026 GAMMA Investing LLC2,168$172K0.0%+22.8%0.001%
7/7/2026 Harbor Investment Advisory LLC1,407$112K0.0%N/A0.001%
6/16/2026Empowered Funds LLC103,141$7.75M0.0%+318.1%0.062%
6/15/2026Carmignac Gestion53,000$3.98M0.1%N/A0.032%
5/29/2026Perceptive Advisors LLC504,000$37.85M0.7%N/A0.305%
5/22/2026Groupama Asset Managment824,540$61.92M0.9%+7.5%0.499%
5/19/2026Stempoint Capital LP26,385$1.98M0.4%N/A0.016%
5/19/2026Edgestream Partners L.P.68,369$5.13M0.2%N/A0.041%
5/18/2026ADAR1 Capital Management LLC160,338$12.04M0.7%+9.0%0.097%
5/18/2026EverSource Wealth Advisors LLC1,794$135K0.0%+57.8%0.001%
5/18/2026California State Teachers Retirement System176,485$13.25M0.0%+22.4%0.107%
5/18/2026Readystate Asset Management LP20,436$1.54M0.1%N/A0.012%
5/18/2026Empowered Funds LLC103,141$7.75M0.0%+318.1%0.062%
5/18/2026Eversept Partners LP632,100$47.46M2.5%+17.4%0.382%
5/18/2026Exome Asset Management LLC110,064$8.27M4.3%-5.5%0.067%
5/16/2026The Manufacturers Life Insurance Company 149,538$11.23M0.0%-2.4%0.090%
5/16/2026Quantinno Capital Management LP55,502$4.17M0.0%+17.1%0.034%
5/15/2026Entropy Technologies LP27,207$2.04M0.1%N/A0.016%
5/14/2026Renaissance Technologies LLC305,549$22.94M0.0%+36.6%0.185%
5/14/2026Public Employees Retirement System of Ohio46,030$3.46M0.0%-3.3%0.028%
5/14/2026Arrowstreet Capital Limited Partnership737,859$55.41M0.0%-30.6%0.446%
5/14/2026Inceptionr LLC16,821$1.26M0.3%-5.8%0.010%
5/13/2026Cetera Investment Advisers11,280$847K0.0%+3.9%0.007%
5/13/2026First Trust Advisors LP468,363$35.17M0.0%-10.8%0.283%
5/8/2026PNC Financial Services Group Inc.13,545$1.02M0.0%-2.0%0.008%
5/8/2026Cassaday & Co Wealth Management LLC400$30K0.0%N/A0.000%
5/8/2026Amova Asset Management Americas Inc.81,696$6.13M0.1%-12.7%0.049%
5/7/2026Florida Financial Advisors LLC25,886$1.94M0.5%N/A0.016%
5/7/2026Dimensional Fund Advisors LP267,215$20.06M0.0%+51.8%0.162%
5/7/2026AlphaCentric Advisors LLC19,587$1.47M1.5%+5.7%0.012%
5/7/2026KBC Group NV30,213$2.27M0.0%+233.8%0.018%
5/7/2026SEB Asset Management AB114,334$8.59M0.0%N/A0.069%
5/7/2026Swiss National Bank304,500$22.87M0.0%+2.0%0.184%
5/7/2026ANB Bank3,769$283K0.1%+18.0%0.002%
5/6/2026California Public Employees Retirement System255,485$19.18M0.0%+19.7%0.155%
5/6/2026Future Fund LLC58,732$4.41M1.6%+28.1%0.036%
5/6/2026Assetmark Inc.9,574$719K0.0%+10.7%0.006%
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5/5/2026Bank of New York Mellon Corp514,617$38.64M0.0%-31.7%0.311%
5/5/2026Sanctuary Advisors LLC3,918$294K0.0%-13.0%0.002%
5/5/2026Checchi Capital Advisers LLC4,429$333K0.0%+3.7%0.003%
5/5/2026Maryland State Retirement & Pension System7,380$554K0.0%-10.9%0.004%
5/4/2026Bleakley Financial Group LLC14,316$1.08M0.0%+3.2%0.009%
5/4/2026Principal Financial Group Inc.7,019$527K0.0%+110.2%0.004%
5/4/2026J. Safra Sarasin Holding AG6,431$483K0.0%-63.0%0.004%
5/1/2026Fifth Third Bancorp11,011$827K0.0%+39.6%0.007%
5/1/2026Candriam S.C.A.484,053$36.35M0.2%-28.6%0.293%
4/30/2026Hsbc Holdings PLC185,967$13.97M0.0%+590.3%0.113%
4/30/2026Granite Investment Partners LLC5,345$401K0.0%+11.2%0.003%
4/30/2026Sumitomo Mitsui Trust Group Inc.81,876$6.15M0.0%-12.7%0.050%
4/30/2026Capstone Capital Management Ltd21,447$1.61M1.6%N/A0.013%
4/29/2026R Squared Ltd4,359$327K0.2%N/A0.003%
4/29/2026Swedbank AB32,253$2.42M0.0%+18.3%0.020%
4/28/2026Cypress Capital LLC6,000$451K0.1%-40.0%0.004%
4/28/2026Stephens Inc. AR26,761$2.01M0.0%N/A0.016%
4/28/2026Praxis Investment Management Inc.6,232$468K0.0%-7.9%0.004%
4/28/2026QRG Capital Management Inc.3,094$232K0.0%N/A0.002%
4/27/2026Optas LLC4,034$303K0.0%N/A0.002%
4/27/2026Fideuram Intesa Sanpaolo Private Banking S.P.A.54,269$4.08M0.1%-55.4%0.033%
4/25/2026Strs Ohio28,782$2.16M0.0%+659.8%0.017%
4/24/2026Root Financial Partners LLC681$51K0.0%-49.1%0.000%
4/22/2026Pictet Asset Management Holding SA1,434,995$107.08M0.1%+1.2%0.869%
4/22/2026Sterling Capital Management LLC1,425$107K0.0%-16.8%0.001%
4/22/2026Ground Swell Capital LLC7,285$547K1.1%N/A0.004%
4/21/2026Sicart Associates LLC159,412$11.97M3.1%-2.5%0.097%
4/20/2026Hilton Head Capital Partners LLC353$27K0.0%-41.1%0.000%
4/20/2026 Assenagon Asset Management S.A.33,673$2.53M0.0%+14.9%0.020%
4/16/2026SG Americas Securities LLC63,295$4.75M0.0%+89.5%0.038%
3/20/2026Hsbc Holdings PLC26,941$2.14M0.0%-40.7%0.016%
3/17/2026Rockefeller Capital Management L.P.2,726$216K0.0%+23.7%0.002%
3/9/2026Corient Private Wealth LLC216,438$17.12M0.0%+3,184.3%0.131%
3/6/2026Hsbc Holdings PLC26,941$2.14M0.0%-40.7%0.016%
2/27/2026Groupama Asset Managment766,889$60.67M0.9%-27.8%0.473%
2/26/2026Alpine Global Management LLC53,600$4.24M0.7%-4.1%0.033%
2/19/2026T. Rowe Price Investment Management Inc.9,108,019$720.54M0.5%-30.8%5.623%
2/19/2026Axxcess Wealth Management LLC2,877$228K0.0%N/A0.002%
2/19/2026Corient Private Wealth LLC214,936$17.00M0.0%+3,161.5%0.133%
2/18/2026Mercer Global Advisors Inc. ADV5,554$439K0.0%+48.2%0.003%
2/18/2026Vident Advisory LLC10,235$810K0.0%-11.4%0.006%
2/18/2026Mackenzie Financial Corp3,891$307K0.0%+8.4%0.002%
2/18/2026ADAR1 Capital Management LLC147,130$11.64M0.9%+9.9%0.091%
2/18/2026Empowered Funds LLC24,671$1.95M0.0%N/A0.015%
2/18/2026XTX Topco Ltd16,917$1.34M0.0%N/A0.010%
2/18/2026Zurich Insurance Group Ltd FI261,820$20.71M0.1%N/A0.162%
2/18/2026Voloridge Investment Management LLC584,970$46.28M0.2%-27.2%0.361%
2/18/2026Virtus Investment Advisers LLC8,454$669K0.2%-32.2%0.005%
2/18/2026Tudor Investment Corp ET AL3,661$290K0.0%N/A0.002%
2/18/2026Summit Securities Group LLC748$59K0.0%N/A0.000%
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2/18/2026Janus Henderson Group PLC68,191$5.40M0.0%+6.8%0.042%
2/18/2026Gotham Asset Management LLC43,212$3.42M0.0%+34.4%0.027%
2/18/2026Engineers Gate Manager LP22,191$1.76M0.0%-13.9%0.014%
2/18/2026Eversept Partners LP538,218$42.58M2.1%-0.1%0.332%
2/18/2026Cinctive Capital Management LP13,726$1.09M0.1%-92.1%0.008%
2/18/2026Artia Global Partners LP144,376$11.42M1.6%+139.9%0.089%
2/18/2026Baker BROS. Advisors LP1,791,841$141.75M0.8%+216.1%1.106%
2/18/2026Bamco Inc. NY36,000$2.85M0.0%+44.0%0.022%
2/17/2026Guggenheim Capital LLC37,709$2.98M0.0%+6.7%0.023%
2/17/2026ADAR1 Capital Management LLC147,130$11.64M0.8%+9.9%0.091%


IONS Institutional Ownership - Frequently Asked Questions

During the previous two years, 433 institutional investors and hedge funds held shares of Ionis Pharmaceuticals. The most heavily invested institutionals were Capital World Investors ($1.42B), Vanguard Group Inc. ($1.30B), T. Rowe Price Investment Management Inc. ($720.54M), Bellevue Group AG ($408.51M), Geode Capital Management LLC ($249.16M), Deep Track Capital LP ($249.13M), and Price T Rowe Associates Inc. MD ($236.37M).Learn more on Ionis Pharmaceuticals' institutional investors.

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

Of the 371 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 ($9.06M), Adage Capital Partners GP L.L.C. ($3.53M), Norges Bank ($2.49M), Baker BROS. Advisors LP ($2.02M), T. Rowe Price Investment Management Inc. ($2.01M), BVF Inc. IL ($1.91M), and Vestal Point Capital LP ($1.67M).

Institutional investors have bought a total of 31,396,322 shares in the last 24 months. This purchase volume represents approximately $2.13B in transactions.

Of the 155 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: T. Rowe Price Investment Management Inc. ($11.42M), New York State Common Retirement Fund ($8.03M), Amundi ($3.20M), Invesco Ltd. ($2.12M), Millennium Management LLC ($1.87M), Bellevue Group AG ($1.61M), and Jefferies Financial Group Inc. ($1.22M).

Institutional investors have sold a total of 43,644,350 shares in the last 24 months. This volume of shares sold represents approximately $2.99B in transactions.


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This page (NASDAQ:IONS) was last updated on 7/10/2026 by MarketBeat.com Staff.
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