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Ionis Pharmaceuticals (IONS) Institutional Ownership

Ionis Pharmaceuticals logo
$76.50 -0.83 (-1.07%)
Closing price 05/29/2026 04:00 PM Eastern
Extended Trading
$78.58 +2.08 (+2.72%)
As of 05/29/2026 07:15 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.
Compare

Institutional Ownership Changes (13F Filings) for Ionis Pharmaceuticals (NASDAQ:IONS)

Current
Institutional Ownership
Percentage
93.86%
Number of
Institutional Buyers
(last 12 months)
288
Total
Institutional Inflows
(last 12 months)
$2.11B
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
5/29/2026 Perceptive Advisors LLC504,000$37.85M0.7%N/A0.305%
5/22/2026 Groupama Asset Managment824,540$61.92M0.9%+7.5%0.499%
5/19/2026 Stempoint Capital LP26,385$1.98M0.4%N/A0.016%
5/19/2026 Edgestream Partners L.P.68,369$5.13M0.2%N/A0.041%
5/18/2026 ADAR1 Capital Management LLC160,338$12.04M0.7%+9.0%0.097%
5/18/2026 EverSource Wealth Advisors LLC1,794$135K0.0%+57.8%0.001%
5/18/2026 California State Teachers Retirement System176,485$13.25M0.0%+22.4%0.107%
5/18/2026 Readystate Asset Management LP20,436$1.54M0.1%N/A0.012%
5/18/2026 Empowered Funds LLC103,141$7.75M0.0%+318.1%0.062%
5/18/2026 Eversept Partners LP632,100$47.46M2.5%+17.4%0.382%
5/18/2026 Exome Asset Management LLC110,064$8.27M4.3%-5.5%0.067%
5/16/2026 The Manufacturers Life Insurance Company 149,538$11.23M0.0%-2.4%0.090%
5/16/2026 Quantinno Capital Management LP55,502$4.17M0.0%+17.1%0.034%
5/15/2026 Entropy Technologies LP27,207$2.04M0.1%N/A0.016%
5/14/2026 Renaissance Technologies LLC305,549$22.94M0.0%+36.6%0.185%
5/14/2026 Public Employees Retirement System of Ohio46,030$3.46M0.0%-3.3%0.028%
5/14/2026 Arrowstreet Capital Limited Partnership737,859$55.41M0.0%-30.6%0.446%
5/14/2026 Inceptionr LLC16,821$1.26M0.3%-5.8%0.010%
5/13/2026 Cetera Investment Advisers11,280$847K0.0%+3.9%0.007%
5/13/2026 First Trust Advisors LP468,363$35.17M0.0%-10.8%0.283%
5/8/2026 PNC Financial Services Group Inc.13,545$1.02M0.0%-2.0%0.008%
5/8/2026 Cassaday & Co Wealth Management LLC400$30K0.0%N/A0.000%
5/8/2026 Amova Asset Management Americas Inc.81,696$6.13M0.1%-12.7%0.049%
5/7/2026 Florida Financial Advisors LLC25,886$1.94M0.5%N/A0.016%
5/7/2026 Dimensional Fund Advisors LP267,215$20.06M0.0%+51.8%0.162%
5/7/2026 AlphaCentric Advisors LLC19,587$1.47M1.5%+5.7%0.012%
5/7/2026 KBC Group NV30,213$2.27M0.0%+233.8%0.018%
5/7/2026 SEB Asset Management AB114,334$8.59M0.0%N/A0.069%
5/7/2026 Swiss National Bank304,500$22.87M0.0%+2.0%0.184%
5/7/2026 ANB Bank3,769$283K0.1%+18.0%0.002%
5/6/2026 California Public Employees Retirement System255,485$19.18M0.0%+19.7%0.155%
5/6/2026 Future Fund LLC58,732$4.41M1.6%+28.1%0.036%
5/6/2026 Assetmark Inc.9,574$719K0.0%+10.7%0.006%
5/5/2026 Bank of New York Mellon Corp514,617$38.64M0.0%-31.7%0.311%
5/5/2026 Sanctuary Advisors LLC3,918$294K0.0%-13.0%0.002%
5/5/2026 Checchi Capital Advisers LLC4,429$333K0.0%+3.7%0.003%
5/5/2026 Maryland State Retirement & Pension System7,380$554K0.0%-10.9%0.004%
5/4/2026 Bleakley Financial Group LLC14,316$1.08M0.0%+3.2%0.009%
5/4/2026 Principal Financial Group Inc.7,019$527K0.0%+110.2%0.004%
5/4/2026 J. Safra Sarasin Holding AG6,431$483K0.0%-63.0%0.004%
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5/1/2026 Fifth Third Bancorp11,011$827K0.0%+39.6%0.007%
5/1/2026 Candriam S.C.A.484,053$36.35M0.2%-28.6%0.293%
4/30/2026 Hsbc Holdings PLC185,967$13.97M0.0%+590.3%0.113%
4/30/2026 Granite Investment Partners LLC5,345$401K0.0%+11.2%0.003%
4/30/2026 Sumitomo Mitsui Trust Group Inc.81,876$6.15M0.0%-12.7%0.050%
4/30/2026 Capstone Capital Management Ltd21,447$1.61M1.6%N/A0.013%
4/29/2026 R Squared Ltd4,359$327K0.2%N/A0.003%
4/29/2026 Swedbank AB32,253$2.42M0.0%+18.3%0.020%
4/28/2026 Cypress Capital LLC6,000$451K0.1%-40.0%0.004%
4/28/2026 Stephens Inc. AR26,761$2.01M0.0%N/A0.016%
4/28/2026 Praxis Investment Management Inc.6,232$468K0.0%-7.9%0.004%
4/28/2026 QRG Capital Management Inc.3,094$232K0.0%N/A0.002%
4/27/2026 Optas LLC4,034$303K0.0%N/A0.002%
4/27/2026 Fideuram Intesa Sanpaolo Private Banking S.P.A.54,269$4.08M0.1%-55.4%0.033%
4/25/2026 Strs Ohio28,782$2.16M0.0%+659.8%0.017%
4/24/2026 Root Financial Partners LLC681$51K0.0%-49.1%0.000%
4/22/2026 Pictet Asset Management Holding SA1,434,995$107.08M0.1%+1.2%0.869%
4/22/2026 Sterling Capital Management LLC1,425$107K0.0%-16.8%0.001%
4/22/2026 Ground Swell Capital LLC7,285$547K1.1%N/A0.004%
4/21/2026 Sicart Associates LLC159,412$11.97M3.1%-2.5%0.097%
4/20/2026 Hilton 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%
4/16/2026 SG Americas Securities LLC63,295$4.75M0.0%+89.5%0.038%
3/20/2026 Hsbc Holdings PLC26,941$2.14M0.0%-40.7%0.016%
3/17/2026 Rockefeller Capital Management L.P.2,726$216K0.0%+23.7%0.002%
3/9/2026 Corient Private Wealth LLC216,438$17.12M0.0%+3,184.3%0.131%
3/6/2026 Hsbc Holdings PLC26,941$2.14M0.0%-40.7%0.016%
2/27/2026 Groupama Asset Managment766,889$60.67M0.9%-27.8%0.473%
2/26/2026 Alpine Global Management LLC53,600$4.24M0.7%-4.1%0.033%
2/19/2026 T. Rowe Price Investment Management Inc.9,108,019$720.54M0.5%-30.8%5.623%
2/19/2026 Axxcess Wealth Management LLC2,877$228K0.0%N/A0.002%
2/19/2026 Corient Private Wealth LLC214,936$17.00M0.0%+3,161.5%0.133%
2/18/2026 Mercer Global Advisors Inc. ADV5,554$439K0.0%+48.2%0.003%
2/18/2026 Vident Advisory LLC10,235$810K0.0%-11.4%0.006%
2/18/2026 Mackenzie Financial Corp3,891$307K0.0%+8.4%0.002%
2/18/2026 ADAR1 Capital Management LLC147,130$11.64M0.9%+9.9%0.091%
2/18/2026 Empowered Funds LLC24,671$1.95M0.0%N/A0.015%
2/18/2026 XTX Topco Ltd16,917$1.34M0.0%N/A0.010%
2/18/2026 Zurich Insurance Group Ltd FI261,820$20.71M0.1%N/A0.162%
2/18/2026 Voloridge Investment Management LLC584,970$46.28M0.2%-27.2%0.361%
2/18/2026 Virtus Investment Advisers LLC8,454$669K0.2%-32.2%0.005%
2/18/2026 Tudor Investment Corp ET AL3,661$290K0.0%N/A0.002%
2/18/2026 Summit Securities Group LLC748$59K0.0%N/A0.000%
2/18/2026 Janus Henderson Group PLC68,191$5.40M0.0%+6.8%0.042%
2/18/2026 Gotham Asset Management LLC43,212$3.42M0.0%+34.4%0.027%
2/18/2026 Engineers Gate Manager LP22,191$1.76M0.0%-13.9%0.014%
2/18/2026 Eversept Partners LP538,218$42.58M2.1%-0.1%0.332%
2/18/2026 Cinctive Capital Management LP13,726$1.09M0.1%-92.1%0.008%
2/18/2026 Artia Global Partners LP144,376$11.42M1.6%+139.9%0.089%
2/18/2026 Baker BROS. Advisors LP1,791,841$141.75M0.8%+216.1%1.106%
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2/18/2026 Bamco Inc. NY36,000$2.85M0.0%+44.0%0.022%
2/17/2026 Guggenheim Capital LLC37,709$2.98M0.0%+6.7%0.023%
2/17/2026 ADAR1 Capital Management LLC147,130$11.64M0.8%+9.9%0.091%
2/17/2026 AQR Capital Management LLC18,762$1.48M0.0%+175.3%0.012%
2/17/2026 Cetera Investment Advisers10,856$859K0.0%+58.0%0.007%
2/17/2026 EFG International AG75,276$5.96M0.1%N/A0.046%
2/17/2026 Jain Global LLC356,259$28.18M0.1%+57.8%0.220%
2/17/2026 Quantedge Capital Pte Ltd18,500$1.46M0.7%N/A0.011%
2/17/2026 Trexquant Investment LP132,241$10.46M0.1%-38.5%0.082%
2/17/2026 Price T Rowe Associates Inc. MD2,987,840$236.37M0.0%+9.5%1.845%


IONS Institutional Ownership - Frequently Asked Questions

During the previous two years, 432 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 370 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 31,089,498 shares in the last 24 months. This purchase volume represents approximately $2.11B 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 43,651,341 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 5/31/2026 by MarketBeat.com Staff.
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