Who owns ARGX? 13F holders and whale ownership
ARGX is tracked across public portfolios in Whale Analyzer. This page answers who owns ARGX, which top funds are buying ARGX, aggregate disclosed value, and recent position changes based on public data. Samuel Isaly is the largest reported holder at $100M; the top five funds control 100.0% of reported ownership; institutions were net selling last quarter (0 increased, 1 reduced). Top tracked holders include Samuel Isaly and Baker Bros. Advisors.
Continue to the live ARGX dashboardTop holders
| Investor | Reported value | Shares | Change |
|---|---|---|---|
| Samuel Isaly 13F portfolio OrbiMed Advisors holdings | $100.0M | 136.9K | Reduced |
| Baker Bros. Advisors 13F portfolio Baker Bros. Advisors holdings | $18.4M | 25.2K | Held |
Ownership concentration
Reported ownership of ARGX is highly concentrated across tracked institutions.
- Single largest holder: 84.5% of reported ownership
- Top 5 holders: 100.0%
- Top 10 holders: 100.0%
Whale activity this quarter
Across 2 tracked institutions, 1 reduced, 1 held. Net positioning is net selling.
- Samuel Isaly — OrbiMed Advisors ($100.0M) (▼ 6.2% qoq shares)
- Baker Bros. Advisors — Baker Bros. Advisors ($18.4M) (→ 0.0% qoq shares)
Sector positioning — Other
ARGX sits within the Other sector alongside 670 other tracked names. Compare whale ownership across peers:
How to use this page
Values are reported public positions from tracked 13F filers and disclosures — not real-time ownership totals. Open the live ARGX dashboard for price charts and cross-investor scans, or read the SEC 13F guide.
Related stock holder pages
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Learn more in Whale Analyzer Academy
Deepen your read on ARGX with these Whale Analyzer Academy guides:
Frequently asked questions
Who owns ARGX stock?
Whale Analyzer tracks 2 public institutional holders of ARGX with a combined reported value of $118.4M. See the holder table above for the largest tracked positions.
Which top funds are buying ARGX?
Tracked institutions were net selling last quarter — 1 reduced, 1 held. Check the "Change" column: "New" = fresh position, "Increased" = added, "Reduced" = trimmed.
How concentrated is ARGX ownership?
The top five tracked holders report 100.0% of aggregate ownership.
What does 13F ownership mean for ARGX?
Use the interactive ARGX dashboard on Whale Analyzer for real-time holder analysis, or read our 13F Alpha Signals Guide.