argenx
ARGX
476 hedge funds and large institutions have $21.1B invested in argenx in 2026 Q1 according to their latest regulatory filings, with 63 funds opening new positions, 177 increasing their positions, 171 reducing their positions, and 87 closing their positions.
84% more call options, than puts
Call options by funds: $251M | Put options by funds: $136M
4% more repeat investments, than reductions
Existing positions increased: 177 | Existing positions reduced: 171
1.75% less ownership
Funds ownership: 48.32% → 46.56% (-1.8%)
6% less funds holding
Funds holding: 508 → 476 (-32)
16% less capital invested
Capital invested by funds: $25B → $21.1B (-$3.92B)
21% less funds holding in top 10
Funds holding in top 10: 14 → 11 (-3)
28% less first-time investments, than exits
New positions opened: 63 | Existing positions closed: 87
Top Buyers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
Wellington Management Group
Boston,
Massachusetts
|
+$268M |
| 2 |
Capital World Investors
Los Angeles,
California
|
+$266M |
| 3 |
Invesco
Atlanta,
Georgia
|
+$140M |
| 4 |
BNP Paribas Financial Markets
Paris,
France
|
+$83.8M |
| 5 |
Adage Capital Partners
Boston,
Massachusetts
|
+$70.4M |
Top Sellers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
Fidelity Investments
Boston,
Massachusetts
|
-$471M |
| 2 |
Artisan Partners
Milwaukee,
Wisconsin
|
-$226M |
| 3 |
ClearBridge Investments
New York
|
-$221M |
| 4 |
VOYA Investment Management
Atlanta,
Georgia
|
-$128M |
| 5 |
Two Sigma Investments
New York
|
-$117M |
ARGX Hedge Fund Activity: Q1 2026 in Review
476 institutional investors reported a position in argenx (ARGX) for Q1 2026, worth a combined $21.1B — down 16% from $25B a quarter earlier.
Sellers outnumbered buyers: 87 funds closed out of ARGX and 63 opened new positions — a net loss of 24 holders — while 171 trimmed existing stakes and 177 added.
The largest buyer was Wellington Management Group, adding an estimated $268M. The largest seller was Fidelity Investments, cutting an estimated $471M.
- 476 institutional investors held argenx (ARGX) as of Q1 2026, down from 508 in Q4 2025.
- Funds reported $21.1B of argenx stock for Q1 2026, down 16% quarter-over-quarter.
- 63 funds opened new argenx positions in Q1 2026 and 87 closed out, a net change of -24 holders.
- The largest argenx buyer in Q1 2026 was Wellington Management Group, an estimated $268M added.
- The largest argenx seller in Q1 2026 was Fidelity Investments, an estimated $471M sold.
Based on aggregated 13F filings for Q1 2026.