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475 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, 176 increasing their positions, 172 reducing their positions, and 85 closing their positions.

New
Increased
Maintained
Reduced
Closed

84% more call options, than puts

Call options by funds: $251M | Put options by funds: $136M

2% more repeat investments, than reductions

Existing positions increased: 176 | Existing positions reduced: 172

2.15% less ownership

Funds ownership: 48.72%46.56% (-2.2%)

6% less funds holding

Funds holding: 507475 (-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: 1411 (-3)

26% less first-time investments, than exits

New positions opened: 63 | Existing positions closed: 85

Holders
475
Holders Change
-32
Holders Change %
-6.31%
% of All Funds
5.85%
Holding in Top 10
11
Holding in Top 10 Change
-3
Holding in Top 10 Change %
-21.43%
% of All Funds
0.14%
New
63
Increased
176
Reduced
172
Closed
85
Calls
$251M
Puts
$136M
Net Calls
+$115M
Net Calls Change
-$84.4M
Name Holding Trade Value Shares
Change
Change in
Stake
HC
201
Henshaw Capital
Massachusetts
$1.36M
BS
202
Banco Santander
Spain
$1.35M +$1.45M +1,847 New
SMH
203
Sanders Morris Harris
Texas
$1.34M +$1.43M +1,830 New
S
204
SignatureFD
Georgia
$1.32M -$31.3K -40 -2%
AA
205
AlphaCentric Advisors
Puerto Rico
$1.31M +$289K +369 +26%
Simplex Trading
206
Simplex Trading
Illinois
$1.29M +$799K +1,021 +136%
IMC Chicago
207
IMC Chicago
Illinois
$1.28M +$1.37M +1,747 New
SOAM
208
SBI Okasan Asset Management
Japan
$1.27M
WIA
209
Westview Investment Advisors
Vermont
$1.27M +$1.36M +1,736 New
BFM
210
Boothbay Fund Management
New York
$1.25M +$1.34M +1,707 New
BIG
211
Brooklyn Investment Group
New York
$1.24M -$162K -207 -11%
TM
212
Taproot Management
New York
$1.22M +$1.31M +1,674 New
LCM
213
LRT Capital Management
Texas
$1.21M +$1.29M +1,653 New
ORI
214
Oak Ridge Investments
Illinois
$1.19M -$21.9K -28 -2%
Daiwa Securities Group
215
Daiwa Securities Group
Japan
$1.18M -$52.4K -67 -4%
Loomis, Sayles & Company
216
Loomis, Sayles & Company
Massachusetts
$1.15M +$1.23M +1,574 New
AA
217
ABC Arbitrage
France
$1.13M +$1.22M +1,554 New
BCM
218
Barometer Capital Management
Ontario, Canada
$1.13M +$1.21M +1,550 New
NL
219
NVWM LLC
Pennsylvania
$1.12M +$462K +590 +62%
QCM
220
QRG Capital Management
Illinois
$1.12M +$475K +607 +66%
WC
221
Wexford Capital
Florida
$1.1M +$783K +1,000 +200%
Russell Investments Group
222
Russell Investments Group
United Kingdom
$1.09M +$136K +174 +13%
SSA
223
Shepherd Street Advisors
California
$1.09M +$38.3K +49 +3%
VAS
224
Vestmark Advisory Solutions
Massachusetts
$1.08M -$1.85M -2,367 -61%
IC
225
IEQ Capital
California
$1.06M -$341K -436 -23%