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argenx
ARGX

Overview Fund Activity

433 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.

New
Increased
Maintained
Reduced
Closed
Holders
433
Holders Change
-9
Holders Change %
-2.04%
% of All Funds
5.81%
Holding in Top 10
17
Holding in Top 10 Change
-1
Holding in Top 10 Change %
-5.56%
% of All Funds
0.23%
New
54
Increased
177
Reduced
145
Closed
60
Calls
$270M
Puts
$120M
Net Calls
+$151M
Net Calls Change
+$5.36M

Top Buyers

1
Janus Henderson Group
Janus Henderson Group
United Kingdom
$1.41B
2
Citadel Advisors
Citadel Advisors
Florida
$477M
3
Millennium Management
Millennium Management
New York
$237M
4
Adage Capital Partners
Adage Capital Partners
Massachusetts
$164M
5
Franklin Resources
Franklin Resources
California
$154M

Top Sellers

1
BlackRock
BlackRock
New York
$303M
2
Morgan Stanley
Morgan Stanley
New York
$237M
3
Artisan Partners
Artisan Partners
Wisconsin
$1.3B
4
T. Rowe Price Associates
T. Rowe Price Associates
Maryland
$2.75B
5
Fidelity Investments
Fidelity Investments
Massachusetts
$2.99B
Name Holding Trade Value Shares
Change 		Shares
Change %
Fidelity Investments
1
Fidelity Investments
Massachusetts
$2.99B -$132M -239,699 -4%
T. Rowe Price Associates
2
T. Rowe Price Associates
Maryland
$2.75B -$223M -404,610 -8%
Janus Henderson Group
3
Janus Henderson Group
United Kingdom
$1.41B +$233M +422,316 +20%
Artisan Partners
4
Artisan Partners
Wisconsin
$1.3B -$240M -436,114 -16%
Capital World Investors
5
Capital World Investors
California
$1.08B +$7.22M +13,090 +0.7%
ACA
6
Avoro Capital Advisors
New York
$648M -$33.2M -60,177 -5%
Citadel Advisors
7
Citadel Advisors
Florida
$477M +$173M +314,031 +57%
ClearBridge Investments
8
ClearBridge Investments
New York
$426M +$59.8M +108,498 +16%
RI
9
RTW Investments
New York
$371M – – –
BG
10
Bellevue Group
Switzerland
$315M -$4.32M -7,835 -1%
BlackRock
11
BlackRock
New York
$303M -$260M -471,179 -46%
Millennium Management
12
Millennium Management
New York
$237M +$88.9M +161,240 +60%
Morgan Stanley
13
Morgan Stanley
New York
$237M -$247M -447,859 -51%
Wellington Management Group
14
Wellington Management Group
Massachusetts
$223M -$480K -871 -0.2%
Bank of America
15
Bank of America
North Carolina
$185M -$2.2M -3,995 -1%
SEI Investments
16
SEI Investments
Pennsylvania
$174M -$24.6M -44,601 -12%
Adage Capital Partners
17
Adage Capital Partners
Massachusetts
$164M +$87.4M +158,476 +114%
Franklin Resources
18
Franklin Resources
California
$154M +$78.6M +142,606 +104%
Jennison Associates
19
Jennison Associates
New York
$146M +$8.37M +15,186 +6%
Invesco
20
Invesco
Georgia
$134M -$76.6M -138,995 -36%
O
21
OrbiMed
New York
$115M +$717K +1,300 +0.6%
American Century Companies
22
American Century Companies
Missouri
$114M +$31.5M +57,054 +38%
Pictet Asset Management
23
Pictet Asset Management
Switzerland
$109M -$17.7M -32,155 -14%
B
24
Braidwell
Connecticut
$107M +$18.5M +33,642 +21%
Allspring Global Investments
25
Allspring Global Investments
North Carolina
$100M +$4.63M +8,537 +5%
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