argenx
ARGX
438 hedge funds and large institutions have $17.7B invested in argenx in 2025 Q2 according to their latest regulatory filings, with 54 funds opening new positions, 177 increasing their positions, 145 reducing their positions, and 60 closing their positions.
126% more call options, than puts
Call options by funds: $270M | Put options by funds: $120M
22% more repeat investments, than reductions
Existing positions increased: 177 | Existing positions reduced: 145
2% less funds holding
Funds holding: 447 → 438 (-9)
2.09% less ownership
Funds ownership: 54.69% → 52.6% (-2.1%)
6% less funds holding in top 10
Funds holding in top 10: 18 → 17 (-1)
10% less first-time investments, than exits
New positions opened: 54 | Existing positions closed: 60
10% less capital invested
Capital invested by funds: $19.7B → $17.7B (-$2.03B)
Top Buyers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
Janus Henderson Group
London,
|
+$245M |
| 2 |
Citadel Advisors
Miami,
Florida
|
+$182M |
| 3 |
Millennium Management
New York
|
+$93.6M |
| 4 |
Adage Capital Partners
Boston,
Massachusetts
|
+$92M |
| 5 |
Franklin Resources
San Mateo,
California
|
+$82.8M |
Top Sellers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
BlackRock
New York
|
-$273M |
| 2 |
Morgan Stanley
New York
|
-$260M |
| 3 |
Artisan Partners
Milwaukee,
Wisconsin
|
-$253M |
| 4 |
T. Rowe Price Associates
Baltimore,
Maryland
|
-$235M |
| 5 |
Fidelity Investments
Boston,
Massachusetts
|
-$139M |
ARGX Hedge Fund Activity: Q2 2025 in Review
438 of the 7,613 institutional investors tracked by Wall St. Rank reported a position in argenx (ARGX) for Q2 2025, worth a combined $17.7B — down 10% from $19.7B a quarter earlier.
Sellers outnumbered buyers: 60 funds closed out of ARGX and 54 opened new positions — a net loss of 6 holders — while 145 trimmed existing stakes and 177 added.
The largest buyer was Janus Henderson Group, adding an estimated $245M. The largest seller was BlackRock, cutting an estimated $273M.
- 438 institutional investors held argenx (ARGX) as of Q2 2025, down from 447 in Q1 2025.
- Funds reported $17.7B of argenx stock for Q2 2025, down 10% quarter-over-quarter.
- 54 funds opened new argenx positions in Q2 2025 and 60 closed out, a net change of -6 holders.
- The largest argenx buyer in Q2 2025 was Janus Henderson Group, an estimated $245M added.
- The largest argenx seller in Q2 2025 was BlackRock, an estimated $273M sold.
Based on aggregated 13F filings for Q2 2025.