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Ionis Pharmaceuticals (IONS) Institutional Ownership

Ionis Pharmaceuticals logo
$42.60 -0.64 (-1.47%)
As of 11:19 AM Eastern
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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)
189
Total
Institutional Inflows
(last 12 months)
$862.96M
Number of
Institutional Sellers
(last 12 months)
123
Total
Institutional Outflows
(last 12 months)
$2.53B
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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
8/19/2025 Marex Group plc83,361$3.29M0.0%N/A0.052%
8/18/2025 Hudson Bay Capital Management LP750,000$29.63M0.1%-28.6%0.471%
8/16/2025 Nikko Asset Management Americas Inc.139,739$5.52M0.1%-1.9%0.088%
8/15/2025 CANADA LIFE ASSURANCE Co46,501$1.84M0.0%+6.0%0.029%
8/15/2025 Tower Research Capital LLC TRC 1,581$62K0.0%-84.0%0.001%
8/15/2025 Exome Asset Management LLC121,116$4.79M2.5%-10.7%0.076%
8/15/2025 Corient Private Wealth LLC237,931$9.40M0.0%+0.3%0.149%
8/15/2025 E Fund Management Co. Ltd.16,160$638K0.0%-1.9%0.010%
8/15/2025 Vestal Point Capital LP500,000$19.76M1.0%N/A0.314%
8/15/2025 Vident Advisory LLC12,000$474K0.0%N/A0.008%
8/15/2025 Teza Capital Management LLC6,604$261K0.2%-35.5%0.004%
8/15/2025 Rafferty Asset Management LLC144,770$5.72M0.0%-17.9%0.091%
8/15/2025 Oxford Asset Management LLP22,405$885K0.3%N/A0.014%
8/15/2025 Orion Investment Co217,370$8.59M3.1%+1.0%0.136%
8/15/2025 Orion Porfolio Solutions LLC5,600$221K0.0%N/A0.004%
8/15/2025 Hudson Bay Capital Management LP750,000$29.63M0.1%-28.6%0.471%
8/15/2025 Engineers Gate Manager LP33,118$1.31M0.0%N/A0.021%
8/15/2025 Brevan Howard Capital Management LP32,732$1.29M0.0%+42.5%0.021%
8/15/2025 Adage Capital Partners GP L.L.C.3,800,000$150.14M0.3%+253.3%2.384%
8/14/2025 PDT Partners LLC54,365$2.15M0.1%-43.4%0.034%
8/14/2025 Paloma Partners Management Co12,557$496K0.1%N/A0.008%
8/14/2025 California State Teachers Retirement System145,104$5.73M0.0%+9.7%0.091%
8/14/2025 Worldquant Millennium Advisors LLC74,438$2.94M0.0%N/A0.047%
8/14/2025 Bayesian Capital Management LP16,600$656K0.1%+95.3%0.010%
8/14/2025 Quantinno Capital Management LP17,542$693K0.0%+106.0%0.011%
8/14/2025 MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd.7,071$281K0.0%-13.8%0.004%
8/14/2025 Treasurer of the State of North Carolina72,587$2.87M0.0%+1.4%0.046%
8/14/2025 Squarepoint Ops LLC134,395$5.31M0.0%-56.0%0.084%
8/14/2025 OCONNOR A Distinct Business Unit of UBS ASSET MANAGEMENT AMERICAS LLC 81,251$3.21M0.2%-10.5%0.051%
8/14/2025 Daiwa Securities Group Inc.26,141$1.03M0.0%+18.1%0.016%
8/14/2025 California Public Employees Retirement System201,993$7.98M0.0%+5.8%0.127%
8/13/2025 Jump Financial LLC9,018$356K0.0%-88.9%0.006%
8/13/2025 Tema Etfs LLC28,161$1.11M0.3%+12.0%0.018%
8/13/2025 Marshall Wace LLP13,100$518K0.0%+43.9%0.008%
8/13/2025 First Trust Advisors LP56,519$2.23M0.0%N/A0.035%
8/13/2025 Kennedy Capital Management LLC132,045$5.22M0.1%-12.2%0.083%
8/13/2025 Guggenheim Capital LLC40,857$1.61M0.0%-1.3%0.026%
8/13/2025 Invesco Ltd.256,235$10.12M0.0%-89.2%0.161%
8/13/2025 Granite Investment Partners LLC43,181$1.71M0.1%-36.9%0.027%
8/13/2025 M&T Bank Corp7,651$303K0.0%N/A0.005%
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8/13/2025 Capital Counsel LLC NY50,205$1.98M0.1%+35.4%0.031%
8/13/2025 Virtus Investment Advisers LLC12,476$493K0.2%+28.6%0.008%
8/13/2025 Norges Bank450,254$17.79M0.0%N/A0.282%
8/13/2025 Hsbc Holdings PLC108,294$4.29M0.0%+44.7%0.068%
8/13/2025 Capital Fund Management S.A.31,219$1.23M0.0%-46.2%0.020%
8/13/2025 Groupama Asset Managment1,160,957$45.87M0.2%+8.6%0.728%
8/13/2025 State Board of Administration of Florida Retirement System153,895$6.08M0.0%+1.0%0.097%
8/13/2025 Russell Investments Group Ltd.9,265$366K0.0%-97.2%0.006%
8/13/2025 Rhenman & Partners Asset Management AB182,000$7.19M0.9%+124.7%0.114%
8/12/2025 North Star Asset Management Inc.16,610$656K0.0%+22.0%0.010%
8/12/2025 Laurel Wealth Advisors LLC23,706$937K0.0%+3,851.0%0.015%
8/12/2025 Edmond DE Rothschild Holding S.A.197,600$7.81M0.1%+59.1%0.124%
8/12/2025 DCF Advisers LLC91,750$3.63M1.7%-1.9%0.058%
8/12/2025 Horizon Kinetics Asset Management LLC11,952$472K0.0%-4.2%0.007%
8/12/2025 Prudential Financial Inc.9,254$341K0.0%+47.8%0.006%
8/12/2025 American Century Companies Inc.472,749$18.68M0.0%+304.9%0.297%
8/12/2025 Rhumbline Advisers181,599$7.18M0.0%-3.5%0.114%
8/12/2025 Franklin Resources Inc.5,556$220K0.0%N/A0.003%
8/12/2025 Legal & General Group Plc404,366$15.98M0.0%+19.5%0.254%
8/12/2025 DNB Asset Management AS12,271$485K0.0%N/A0.008%
8/12/2025 Entropy Technologies LP29,452$1.16M0.1%N/A0.018%
8/12/2025 Swiss National Bank288,600$11.40M0.0%+4.8%0.181%
8/12/2025 Westfield Capital Management Co. LP9,561$378K0.0%N/A0.006%
8/12/2025 Ensign Peak Advisors Inc53,320$2.11M0.0%-3.2%0.033%
8/12/2025 Artisan Partners Limited Partnership354,962$14.03M0.0%+74.7%0.223%
8/11/2025 Pinnacle Wealth Planning Services Inc.5,284$209K0.0%N/A0.003%
8/11/2025 Frank Rimerman Advisors LLC5,763$228K0.0%N/A0.004%
8/11/2025 Raiffeisen Bank International AG56,754$2.27M0.0%+35.9%0.036%
8/11/2025 Semanteon Capital Management LP9,536$377K0.6%+26.4%0.006%
8/8/2025 Creative Planning53,289$2.11M0.0%+47.5%0.033%
8/8/2025 Grandfield & Dodd LLC37,230$1.47M0.1%-1.4%0.023%
8/8/2025Allianz SE2,100$83K0.0%N/A0.001%
8/8/2025 Candriam S.C.A.724,740$28.64M0.2%-27.1%0.455%
8/8/2025 Police & Firemen s Retirement System of New Jersey59,723$2.36M0.0%+3.8%0.037%
8/8/2025 Geode Capital Management LLC2,891,095$114.25M0.0%+1.7%1.814%
8/8/2025 PNC Financial Services Group Inc.11,411$451K0.0%+3.9%0.007%
8/8/2025 KBC Group NV4,699$186K0.0%-97.7%0.003%
8/7/2025 Allworth Financial LP740$29K0.0%+231.8%0.000%
8/7/2025 ProShare Advisors LLC5,943$235K0.0%-17.1%0.004%
8/7/2025 Profund Advisors LLC28,859$1.14M0.0%-17.3%0.018%
8/7/2025 Future Fund LLC29,595$1.17M0.5%N/A0.019%
8/7/2025 Connor Clark & Lunn Investment Management Ltd.265,793$10.50M0.0%+105.6%0.167%
8/7/2025 Mitsubishi UFJ Asset Management Co. Ltd.5,398$213K0.0%-12.0%0.003%
8/6/2025 Fox Run Management L.L.C.10,988$434K0.1%N/A0.007%
8/6/2025 Vestmark Advisory Solutions Inc.14,341$567K0.0%N/A0.009%
8/6/2025 Savant Capital LLC5,607$222K0.0%N/A0.004%
8/6/2025 C WorldWide Group Holding A S450,000$17.78M0.2%+12.5%0.282%
8/5/2025 Huntington National Bank795$31K0.0%-27.3%0.000%
8/5/2025 Corton Capital Inc.14,424$570K0.7%N/A0.009%
8/4/2025 Pinnacle Associates Ltd.494,539$19.54M0.3%-18.7%0.310%
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8/4/2025 BLB&B Advisors LLC151,550$5.99M0.3%-0.4%0.095%
8/4/2025 Amalgamated Bank11,526$455K0.0%+9.0%0.007%
8/4/2025 Atria Investments Inc8,186$323K0.0%N/A0.005%
8/1/2025 IQ EQ FUND MANAGEMENT IRELAND Ltd13,263$524K0.0%+64.6%0.008%
8/1/2025 Teacher Retirement System of Texas668,273$26.40M0.1%+33.5%0.420%
8/1/2025 Y Intercept Hong Kong Ltd37,649$1.49M0.0%N/A0.024%
8/1/2025 Envestnet 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%
(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, 320 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 Adage Capital Partners GP L.L.C. ($150.14M).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 254 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: Adage Capital Partners GP L.L.C. ($4.59M), Wellington Management Group LLP ($3.70M), Capital World Investors ($3.64M), Norges Bank ($3.34M), T. Rowe Price Investment Management Inc. ($2.01M), BVF Inc. IL ($1.91M), and Vanguard Group Inc. ($1.42M).

How much institutional buying is happening at Ionis Pharmaceuticals?

Institutional investors have bought a total of 24,647,080 shares in the last 24 months. This purchase volume represents approximately $862.96M in transactions.

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

Of the 123 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 Invesco Ltd. ($2.12M).

How much institutional selling is happening at Ionis Pharmaceuticals?

Institutional investors have sold a total of 77,129,760 shares in the last 24 months. This volume of shares sold represents approximately $2.53B in transactions.


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This page (NASDAQ:IONS) was last updated on 8/22/2025 by MarketBeat.com Staff
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