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Smart Money Score
Composite context from Form 4, 13F and congressional disclosures; not a forecast.
Of the 15 tracked institutions holding ARGX, 9 have a 3-year clone track record — 7 of them beat the S&P. Average holder's clone alpha: +3.9pt. It's a gauge of who owns the name, not just how many.
Among the 15 tracked institutional investors we monitor, ARGX (ARGENX SE) is held with a combined value of $9.50B across 10,257,561 shares. The largest holder is FMR LLC with a position worth $4.85B (0.21% of their portfolio). 4 funds opened new positions in the most recent quarter. 5 funds increased their holdings. 6 funds reduced their position.
Total Institutional Value
$9.50B
Total Shares Held
10,257,561
Institutional Holders
15
% of Shares Outstanding
16.6%
of 61.88M shares · SEC 2025-12-31
Days to Cover
4.3-9.9%
1.20M shares short · FINRA 2026-08-14
Tracked 13F institutions hold 16.6% of ARGX's shares outstanding. This is a floor: 13F filings arrive on a ~45-day lag and we track only a subset of institutional filers, so true institutional ownership is higher. Shares-outstanding is the latest SEC cover-page figure (as of 2025-12-31), not a live float.
Ranked by estimated dollars moved (share change × implied price). 13F data lags up to 45 days.
| # | Fund | Value↓ | Portfolio % | Change |
|---|---|---|---|---|
| 1 | FMR LLC | $4.85B | 0.21% | +4.8% |
| 2 | PRICE T ROWE ASSOCIATES INC /MD/ | $2.48B | 0.25% | -20.6% |
| 3 | WELLINGTON MANAGEMENT GROUP LLP | $863.33M | 0.15% | -8.9% |
| 4 | BlackRock, Inc. | $721.10M | 0.01% | -3.8% |
| 5 | CITADEL ADVISORS LLC | $197.07M | 0.11% | -3.1% |
| 6 | TWO SIGMA ADVISERS, LP | $113.95M | 0.22% | -3.0% |
| 7 | MILLENNIUM MANAGEMENT LLC | $87.58M | 0.06% | +30.5% |
| 8 | Capital Research Global Investors | $82.12M | 0.01% | New |
| 9 | ADAGE CAPITAL PARTNERS GP, L.L.C. | $46.95M | 0.07% | -43.8% |
| 10 | Point72 Asset Management, L.P. | $37.10M | 0.06% | New |
SEC Schedule 13D (activist) and 13G (passive) filings for ARGX. Filed when an investor acquires 5%+ ownership.
| Member | Type | Date |
|---|---|---|
| Alan Armstrong | Buy | Mar 30, 2026 |
As of the latest SEC 13F filings, FMR LLC is the largest institutional holder of ARGX with a position worth $4.85B, representing 0.21% of their portfolio. In total, 15 institutional investors hold ARGX with a combined value of $9.50B.
In the most recent quarter, 4 funds opened a new position in ARGX. Additionally, 5 increased their holdings and 6 reduced their positions.
Institutional investors hold $9.50B worth of ARGX stock across 15 positions. The largest institutional holder is FMR LLC with $4.85B in holdings.
A 13F filing is a quarterly report required by the SEC from institutional investment managers with over $100 million in assets. It discloses their holdings in U.S. equities. For ARGX, these filings reveal which major funds are accumulating or reducing positions, providing insights into institutional sentiment.
Get notified when hedge funds change their ARGX positions.
Alpha = the manager's 3-year clone return minus the S&P 500. A skilled roster is a stronger tell than a crowded one — though even skilled managers' edge doesn't reliably survive the 13F disclosure lag. Why →
Last Close
$1,002
2026-09-09
YTD
+19.3%
86% of 52-week range
