InvestorLens

IONS — IONIS PHARMACEUTICALS INC

Public company

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For educational research only.InvestorLens analyzes public regulatory filings (SEC EDGAR, STOCK Act PTRs) that may be delayed by 45 days or more. Information shown is historical and is not financial, legal, or tax advice, nor a recommendation or solicitation to buy or sell any security. Always do your own research.

InvestorLens aggregates public filing data to show which tracked investors reported holdings in this stock. Dollar values represent reported position values, not market capitalization, and may be delayed up to 45 days. Not a recommendation.

Sourced from SEC EDGAR public filings

About IONIS PHARMACEUTICALS INC (IONS)

IONIS PHARMACEUTICALS INC (IONS) appears in the most recent 13F filings of 5 tracked institutional investors. The largest disclosed position is held by Ken Griffin (Citadel Advisors), valued at $183M. Across recent filings, tracked investors recorded 2 new positions, 1 increased, 3 reduced, and 1 exited. All data sourced from SEC 13F filings.

Smart Money Consensus™

Based on recent institutional activity in IONS

43
/100
Mixed Activity
Added / Increased3
Reduced3
Exited1
BearishBullish
Crowded Trade Score™

How many top investors track IONS

33
/100
Emerging Interest
5investors

A small number of top investors own this.

UndiscoveredCrowded
151015+

IONS Ownership Composition

How IONIS PHARMACEUTICALS INC is held across tracked investor types, based on reported 13F positions.

Dominant Type
Other
88% of tracked value
Institutions
5
tracked investors
Total Reported
$206.9M
combined 13F value
Sectors3
  • Other88.2%
  • Growth Funds10.5%
  • Hedge Funds1.3%
Other(3)
88.2%
Growth Funds(1)
10.5%
Hedge Funds(1)
1.3%

Tracked investors reporting IONS

  • Ken GriffinMar 31, 2026
    Citadel Advisors
    Shares
    1.3M
    Value
    $98.1M
    % Portfolio
    0.02%
  • Izzy EnglanderMar 31, 2026
    Millennium Management
    Shares
    1.1M
    Value
    $79M
    % Portfolio
    0.03%
  • Cathie WoodMar 31, 2026
    ARK Investment Management
    Shares
    288.7K
    Value
    $21.7M
    % Portfolio
    0.17%
  • Ray DalioDec 31, 2025
    Bridgewater Associates
    Shares
    67.7K
    Value
    $5.4M
    % Portfolio
    0.07%
  • Steve CohenMar 31, 2026
    Point72 Asset Management
    Shares
    37.1K
    Value
    $2.8M
    % Portfolio
    0.00%

Recent activity

Frequently asked questions

How many institutional investors hold IONS?
5 tracked institutional investors disclosed a position in IONS (IONIS PHARMACEUTICALS INC) in their most recent 13F filing.
Who is the largest institutional holder of IONS?
Ken Griffin, Citadel Advisors, holds the largest disclosed position in IONS, valued at $183M.
Did institutional ownership of IONS increase or decrease?
Across recent 13F filings, tracked investors recorded 2 new positions, 1 increased, 3 reduced, and 1 fully exited IONS.
Where does this IONS ownership data come from?
SEC Form 13F-HR filings, accessed via EDGAR. 13F filings are disclosed quarterly with a 45-day reporting delay and cover U.S.-listed long equity positions only. This is not investment advice.