InvestorLens

ARGX — ARGENX SE

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

Why are billionaires buying ARGX?

Built from public SEC filings and public economic data. Not a recommendation.

Confidence
75
Institutional Conviction
Mixed · 3 buying vs 1 selling last quarter
49
Macro Tailwind
Macro conditions are mixed for this sector
55
Congressional Activity
1 congressional purchase, 0 sales disclosed in the last 6 months
Why? — Evidence & Confidence ▾

Of 4 tracked investors who changed their ARGX position last quarter, 3 bought and 1 sold (75% buy-side). Macro conditions are mixed for this sector (Macro Tailwind 55/100 in a Squeeze regime). 1 congressional purchase, 0 sales disclosed in the last 6 months.

Supporting evidence
  • +3 tracked investors added or increased positions last quarter (Izzy Englander, Ray Dalio, Steve Cohen)
  • +4 tracked investors reported holding ARGX at their latest filing
  • +Macro Health is 55/100 in a Squeeze regime — historically acceptable for this sectorsource
Contradicting evidence — always shown
  • −1 tracked investor reduced or exited last quarter (1 reduced, 0 sold out)
  • −13F data is disclosed up to 45 days after quarter end — positions may have changed since
Know the limits
  • · 13F disclosure lag (up to 45 days)
  • · Tracked investors are a sample, not the whole market
  • · Sector regime fit is a historical average, not a guarantee

Every InvestorLens score shows its evidence — including what argues against it. Model conviction-v1 · generated 8/20/2026.

About ARGENX SE (ARGX)

ARGENX SE (ARGX) appears in the most recent 13F filings of 4 tracked institutional investors. The largest disclosed position is held by Ken Griffin (Citadel Advisors), valued at $497M. Across recent filings, tracked investors recorded 8 new positions, 10 increased, 7 reduced, and 4 exited. All data sourced from SEC 13F filings.

Smart Money Consensus™

Based on recent institutional activity in ARGX

62
/100
Institutional Accumulation
Added / Increased18
Reduced7
Exited4
BearishBullish
Crowded Trade Score™

How many top investors track ARGX

27
/100
Emerging Interest
4investors

A small number of top investors own this.

UndiscoveredCrowded
151015+

ARGX Ownership Composition

How ARGENX SE is held across tracked investor types, based on reported 13F positions.

Dominant Type
Multi-Strategy / Quant
100% of tracked value
Institutions
4
tracked investors
Total Reported
$385.4M
combined 13F value
Types2
  • Multi-Strategy / Quant99.5%
  • Macro0.5%
Multi-Strategy / Quant(3)
99.5%
Macro(1)
0.5%

Tracked investors currently reporting ARGX

1 tracked investor has since exited this position — listed separately below.

  • Ken GriffinJun 30, 2026
    Citadel Advisors
    Shares
    273.3K
    Value
    $253.6M
    % Portfolio
    0.03%
  • Izzy EnglanderJun 30, 2026
    Millennium Management
    Shares
    94.4K
    Value
    $87.6M
    % Portfolio
    0.03%
  • Steve CohenJun 30, 2026
    Point72 Asset Management
    Shares
    45.8K
    Value
    $42.5M
    % Portfolio
    0.05%
  • Ray DalioJun 30, 2026
    Bridgewater Associates
    Shares
    2K
    Value
    $1.8M
    % Portfolio
    0.01%

Previously held ARGX

These investors reported ARGX in an earlier quarter but not in their most recent 13F. Figures below are their last reported position, not a current holding.

InvestorFirmLast reported sharesValue thenLast held
Paul Tudor JonesTudor Investment Corp2.1K$1.8MDec 31, 2025

Recent activity

Frequently asked questions

How many institutional investors hold ARGX?
4 tracked institutional investors disclosed a position in ARGX (ARGENX SE) in their most recent 13F filing.
Who is the largest institutional holder of ARGX?
Ken Griffin, Citadel Advisors, holds the largest disclosed position in ARGX, valued at $497M.
Did institutional ownership of ARGX increase or decrease?
Across recent 13F filings, tracked investors recorded 8 new positions, 10 increased, 7 reduced, and 4 fully exited ARGX.
Where does this ARGX 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.