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Ionis Pharmaceuticals (IONS) Institutional Ownership

Ionis Pharmaceuticals logo
$27.82 +0.51 (+1.85%)
As of 11:10 AM 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)
269
Total
Institutional Inflows
(last 12 months)
$2.22B
Number of
Institutional Sellers
(last 12 months)
128
Total
Institutional Outflows
(last 12 months)
$2.13B
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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
11/13/2026Bleakley Financial Group LLC14,343$640K0.0%-3.0%0.009%
11/12/2026AlphaGrep UK Ltd10,358$462K0.1%+251.6%0.006%
11/12/2026Meeder Advisory Services Inc.8,164$365K0.0%+6.6%0.005%
11/12/2026First Trust Advisors LP361,567$16.14M0.0%-15.4%0.217%
11/12/2026Horizon Kinetics Asset Management LLC9,856$440K0.0%-9.6%0.006%
11/11/2026 Edmond DE Rothschild Holding S.A.146,320$6.53M0.1%+29.1%0.088%
11/11/2026 GW&K Investment Management LLC1,341,315$59.89M0.5%+79.6%0.807%
11/10/2026 Landscape Capital Management L.L.C.14,429$644K0.0%N/A0.009%
11/10/2026 Public Sector Pension Investment Board100,000$4.28M0.0%N/A0.060%
11/10/2026 Edgestream Partners L.P.18,076$807K0.0%N/A0.011%
11/9/2026 Ground Swell Capital LLC12,254$547K1.3%N/A0.007%
11/6/2026 Allworth Financial LP928$41K0.0%+79.8%0.001%
11/6/2026 Fisher Asset Management LLC182,997$8.17M0.0%+33.4%0.110%
11/6/2026 Russell Investments Group Ltd.170,799$7.77M0.0%+110.0%0.103%
11/6/2026 Eurizon Capital SGR S.p.A.2,968$136K0.0%-18.4%0.002%
11/6/2026 Fifth Third Bancorp6,889$308K0.0%-31.5%0.004%
11/5/2026 Maryland State Retirement & Pension System10,215$456K0.0%+22.4%0.006%
11/4/2026 AlphaCore Capital LLC7,652$342K0.0%+53.5%0.005%
11/4/2026 Fulcrum Asset Management LLP8,754$402K0.0%N/A0.005%
11/4/2026 Candriam S.C.A.755,024$33.84M0.2%+69.7%0.454%
11/3/2026 Ethic Inc.39,641$1.77M0.0%+25.1%0.024%
11/3/2026 Pictet Asset Management Holding SA1,944,020$87.25M0.1%+21.7%1.170%
11/3/2026 AlphaCentric Advisors LLC16,163$722K0.6%+4.8%0.010%
11/3/2026 Privium Fund Management B.V.349,003$15.58M3.0%+9.1%0.210%
11/3/2026 CenterBook Partners LP112,240$5.01M0.2%+25.7%0.068%
11/2/2026 Pekin Hardy Strauss Inc.8,325$372K0.0%N/A0.005%
10/30/2026 Provenance Wealth Advisors LLC5,387$241K0.0%N/A0.003%
10/29/2026 Sicart Associates LLC159,294$6.84M1.6%-0.9%0.096%
10/29/2026 Nippon Life Global Investors Americas Inc.228,630$10.21M0.4%N/A0.138%
10/29/2026 Sumitomo Mitsui Trust Group Inc.74,003$3.30M0.0%+54.7%0.045%
10/29/2026 Mirae Asset Global Investments Co. Ltd.8,968$400K0.0%N/A0.005%
10/29/2026 Profund Advisors LLC38,639$1.73M0.1%+110.9%0.023%
10/29/2026 ProShare Advisors LLC5,762$257K0.0%+6.4%0.003%
10/29/2026 Grandfield & Dodd LLC37,396$1.67M0.1%+0.9%0.023%
10/29/2026 State of Wyoming1,341$60K0.0%-33.7%0.001%
10/28/2026 China Universal Asset Management Co. Ltd.83,922$3.85M0.2%+10.0%0.000%
10/28/2026 Motley Fool Asset Management LLC83,753$3.74M0.1%N/A0.000%
10/28/2026 Pinnacle Wealth Planning Services Inc.2,027$91K0.0%-46.4%0.000%
10/28/2026 North Dakota State Investment Board5,035$225K0.0%+7.1%0.000%
10/27/2026 Laurel Wealth Advisors LLC600$27K0.0%N/A0.000%
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10/27/2026 BLB&B Advisors LLC13,949$623K0.0%-51.2%0.008%
10/26/2026 Park Avenue Securities LLC4,875$218K0.0%+32.6%0.003%
10/23/2026 Sterling Capital Management LLC618$28K0.0%-52.1%0.000%
10/23/2026 Inspire Investing LLC10,513$469K0.0%+29.4%0.006%
10/22/2026 Root Financial Partners LLC673$30K0.0%N/A0.000%
10/21/2026 Pinnacle Associates Ltd.436,404$19.49M0.2%+4.0%0.263%
10/21/2026 Nisa Investment Advisors LLC956$43K0.0%+64.8%0.001%
10/16/2026 Vontobel Holding Ltd.6,187$276K0.0%+24.8%0.004%
10/15/2026 Assenagon Asset Management S.A.42,486$1.90M0.0%+3.8%0.026%
10/15/2026 Fortitude Family Office LLC767$34K0.0%+4,411.8%0.000%
10/13/2026 Avior Wealth Management LLC5,321$238K0.0%N/A0.003%
10/9/2026 Wedmont Private Capital6,400$277K0.0%-4.8%0.004%
10/9/2026 GAMMA Investing LLC1,763$79K0.0%-18.7%0.001%
10/8/2026 Farther Finance Advisors LLC732$33K0.0%-34.1%0.000%
10/2/2026 Versant Capital Management Inc2,000$89K0.0%+37.0%0.001%
9/9/2026Sequoia Financial Advisors LLC3,567$283K0.0%N/A0.002%
9/9/2026Tidal Investments LLC49,178$3.90M0.0%+42.8%0.030%
9/9/2026 MCF Advisors LLC6,136$487K0.0%+12,172.0%0.004%
9/9/2026Engineers Gate Manager LP14,840$1.18M0.0%-88.9%0.009%
9/9/2026Integrated Wealth Concepts LLC2,926$232K0.0%+7.4%0.002%
9/9/2026NewEdge Advisors LLC4,822$382K0.0%-77.9%0.003%
9/9/2026 Squarepoint Ops LLC109,379$8.67M0.0%-84.3%0.066%
9/8/2026 Arizona State Retirement System43,302$3.43M0.0%+2.5%0.026%
9/8/2026Carmignac Gestion321,000$25.45M0.3%+505.7%0.193%
9/8/2026 Nykredit A S6,154$488K0.0%N/A0.004%
8/26/2026 HighTower Advisors LLC4,084$324K0.0%+7.6%0.002%
8/25/2026 VIRGINIA RETIREMENT SYSTEMS ET Al13,400$1.06M0.0%N/A0.008%
8/22/2026AlphaGrep UK Ltd2,946$234K0.1%N/A0.002%
8/21/2026AXQ Capital LP10,423$826K0.1%+171.0%0.006%
8/21/2026Braidwell LP116,762$9.26M0.3%-10.8%0.070%
8/21/2026 Nykredit A S6,154$488K0.0%N/A0.004%
8/20/2026Ancora Advisors LLC2,215$176K0.0%-7.4%0.001%
8/20/2026Alyeska Investment Group L.P.1,417,916$112.43M0.3%+199.7%0.853%
8/20/2026Northwestern Mutual Wealth Management Co.10,925$866K0.0%-1.8%0.007%
8/19/2026Van ECK Associates Corp63,396$5.03M0.0%+83.7%0.038%
8/19/2026Hsbc Holdings PLC188,402$15.05M0.0%+1.3%0.113%
8/19/2026 Archer Investment Corp600$48K0.0%N/A0.000%
8/18/2026North Star Asset Management Inc.16,560$1.31M0.1%N/A0.010%
8/18/2026Empowered Funds LLC223,142$17.69M0.1%N/A0.134%
8/18/2026Jefferies Financial Group Inc.38,665$3.07M0.0%N/A0.023%
8/18/2026Public Employees Retirement System of Ohio46,862$3.72M0.0%N/A0.028%
8/17/2026Corient Private Wealth LP196,791$15.60M0.0%N/A0.118%
8/17/2026Artia Global Partners LP144,376$11.45M2.1%N/A0.087%
8/17/2026Bamco Inc. NY14,000$1.11M0.0%N/A0.008%
8/17/2026Bank of America Corp DE790,990$62.72M0.0%N/A0.476%
8/17/2026Boone Capital Management LLC519,977$41.23M9.6%N/A0.313%
8/15/2026Freestone Grove Partners LP339,967$26.96M0.2%N/A0.205%
8/15/2026Jupiter Topco LLC68,191$5.41M0.0%N/A0.041%
8/14/2026ADAR1 Capital Management LLC166,286$13.19M0.6%N/A0.100%
8/14/2026Hsbc Holdings PLC188,402$15.05M0.0%N/A0.113%
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8/14/2026EFG International AG122,804$9.74M0.2%N/A0.074%
8/14/2026Ancora Advisors LLC2,215$176K0.0%N/A0.001%
8/14/2026Canada Pension Plan Investment Board33,300$2.64M0.0%N/A0.020%
8/14/2026Legal & General Group Plc299,184$23.72M0.0%N/A0.180%
8/14/2026The Manufacturers Life Insurance Company120,678$9.57M0.0%N/A0.073%
8/14/2026Algert Global LLC206,853$16.40M0.2%+77.5%0.124%
8/13/2026Sanctuary Advisors LLC3,938$312K0.0%N/A0.002%
8/13/2026Polymer Capital Management HK LTD177,897$14.11M0.7%N/A0.107%
8/13/2026 Connor Clark & Lunn Investment Management Ltd.684,236$54.25M0.1%N/A0.412%
8/13/2026Bank of Nova Scotia68,548$5.44M0.0%N/A0.041%


IONS Institutional Ownership - Frequently Asked Questions

During the previous two years, 447 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 395 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 29,514,850 shares in the last 24 months. This purchase volume represents approximately $2.22B in transactions.

Of the 125 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), Amundi ($3.20M), Millennium Management LLC ($1.87M), Bellevue Group AG ($1.61M), Adage Capital Partners GP L.L.C. ($1.18M), Deep Track Capital LP ($1.08M), and Marshall Wace LLP ($701.90K).

Institutional investors have sold a total of 28,521,120 shares in the last 24 months. This volume of shares sold represents approximately $2.13B in transactions.


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Institutional ownership data for NASDAQ:IONS is compiled from quarterly 13F filings submitted to the U.S. Securities and Exchange Commission (SEC), with the most recent received on 11/13/2026. New 13F filings are added each quarter as they're published.
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