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Ionis Pharmaceuticals (IONS) Institutional Ownership

Ionis Pharmaceuticals logo
$75.90 +0.19 (+0.25%)
As of 01:10 PM Eastern
This is a fair market value 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)
297
Total
Institutional Inflows
(last 12 months)
$2.21B
Number of
Institutional Sellers
(last 12 months)
161
Total
Institutional Outflows
(last 12 months)
$3.90B
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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
5/8/2026 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%
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%
3/17/2026Rockefeller 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%
3/6/2026 Hsbc 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%
2/19/2026 Axxcess 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%
2/18/2026 Summit Securities Group LLC748$59K0.0%N/A0.000%
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%
2/17/2026AQR Capital Management LLC18,762$1.48M0.0%+175.3%0.012%
2/17/2026Cetera Investment Advisers10,856$859K0.0%+58.0%0.007%
2/17/2026EFG International AG75,276$5.96M0.1%N/A0.046%
2/17/2026Jain Global LLC356,259$28.18M0.1%+57.8%0.220%
2/17/2026Quantedge Capital Pte Ltd18,500$1.46M0.7%N/A0.011%
2/17/2026Trexquant Investment LP132,241$10.46M0.1%-38.5%0.082%
2/17/2026Price T Rowe Associates Inc. MD2,987,840$236.37M0.0%+9.5%1.845%
2/17/2026T. Rowe Price Investment Management Inc.5,789,863$458.04M0.5%-56.0%3.575%
2/17/2026Osaic Holdings Inc.11,646$921K0.0%+14.5%0.007%
2/17/2026Adage Capital Partners GP L.L.C.140,000$11.08M0.0%-89.4%0.086%
2/17/2026Public Employees Retirement System of Ohio47,598$3.77M0.0%-2.0%0.029%
2/17/2026California State Teachers Retirement System144,173$11.41M0.0%-0.6%0.089%
2/17/2026 Russell Investments Group Ltd.43,912$3.47M0.0%-43.2%0.027%
2/17/2026Captrust Financial Advisors5,293$419K0.0%N/A0.003%
2/17/2026Artisan Partners Limited Partnership1,181,416$93.46M0.1%+32.7%0.729%
2/17/2026Fred Alger Management LLC38,423$3.04M0.0%-9.4%0.024%
2/17/2026&PARTNERS9,723$769K0.0%-23.2%0.006%
2/17/2026ExodusPoint Capital Management LP83,875$6.64M0.1%-44.9%0.052%
2/17/2026 Blair William & Co. IL33,788$2.67M0.0%-1.7%0.021%
2/17/2026Graham Capital Management L.P.7,596$601K0.0%-55.7%0.005%
2/17/2026Polar Capital Holdings Plc1,333,424$105.49M0.4%+29.0%0.823%
2/16/2026Vanguard Personalized Indexing Management LLC12,461$986K0.0%+3.1%0.008%
2/16/2026Verition Fund Management LLC22,685$1.80M0.0%-39.0%0.014%
2/16/2026PEAK6 LLC30,642$2.42M0.0%+14.3%0.019%
2/16/2026Mariner LLC47,740$3.78M0.0%+97.1%0.029%
2/16/2026Healthcare of Ontario Pension Plan Trust Fund110,000$8.70M0.0%-5.2%0.068%
2/16/2026Kennedy Capital Management LLC109,291$8.65M0.2%-11.0%0.067%


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 369 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 35,977,457 shares in the last 24 months. This purchase volume represents approximately $2.21B in transactions.

Of the 161 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), 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 ($2.01M), and Bellevue Group AG ($1.61M).

Institutional investors have sold a total of 74,288,411 shares in the last 24 months. This volume of shares sold represents approximately $3.90B in transactions.


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This page (NASDAQ:IONS) was last updated on 5/11/2026 by MarketBeat.com Staff.
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