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446 hedge funds and large institutions have $19.7B invested in argenx in 2025 Q1 according to their latest regulatory filings, with 83 funds opening new positions, 158 increasing their positions, 149 reducing their positions, and 27 closing their positions.

New
Increased
Maintained
Reduced
Closed

207% more first-time investments, than exits

New positions opened: 83 | Existing positions closed: 27

84% more call options, than puts

Call options by funds: $319M | Put options by funds: $174M

13% more funds holding

Funds holding: 396446 (+50)

6% more repeat investments, than reductions

Existing positions increased: 158 | Existing positions reduced: 149

0% more funds holding in top 10

Funds holding in top 10: 1818 (0)

1.63% less ownership

Funds ownership: 56.53%54.9% (-1.6%)

6% less capital invested

Capital invested by funds: $21B → $19.7B (-$1.26B)

Holders
446
Holders Change
+50
Holders Change %
+12.63%
% of All Funds
5.98%
Holding in Top 10
18
Holding in Top 10 Change
Holding in Top 10 Change %
% of All Funds
0.24%
New
83
Increased
158
Reduced
149
Closed
27
Calls
$319M
Puts
$174M
Net Calls
+$145M
Net Calls Change
-$48.4M
Name Holding Trade Value Shares
Change
Change in
Stake
Fidelity Investments
1
Fidelity Investments
Massachusetts
$3.35B +$28.4M +44,985 +0.8%
T. Rowe Price Associates
2
T. Rowe Price Associates
Maryland
$3.19B -$83.5M -132,308 -2%
Artisan Partners
3
Artisan Partners
Wisconsin
$1.65B -$179M -284,105 -9%
Janus Henderson Group
4
Janus Henderson Group
United Kingdom
$1.26B -$107M -169,275 -7%
Capital World Investors
5
Capital World Investors
California
$1.15B +$95.3M +151,056 +8%
ACA
6
Avoro Capital Advisors
New York
$731M -$2.08M -3,290 -0.3%
BlackRock
7
BlackRock
New York
$604M -$30.1M -47,625 -4%
Morgan Stanley
8
Morgan Stanley
New York
$519M -$38.7M -61,388 -7%
RI
9
RTW Investments
New York
$399M
ClearBridge Investments
10
ClearBridge Investments
New York
$393M +$21.8M +34,540 +5%
BG
11
Bellevue Group
Switzerland
$343M -$9.03M -14,310 -2%
Citadel Advisors
12
Citadel Advisors
Florida
$327M +$23.9M +37,834 +7%
Wellington Management Group
13
Wellington Management Group
Massachusetts
$240M -$11.8M -18,770 -4%
Invesco
14
Invesco
Georgia
$227M -$13.4M -21,275 -5%
SEI Investments
15
SEI Investments
Pennsylvania
$214M -$3.55M -5,620 -2%
Bank of America
16
Bank of America
North Carolina
$201M +$51.5M +81,566 +32%
Lord, Abbett & Co
17
Lord, Abbett & Co
New Jersey
$163M +$43.2M +68,498 +33%
Millennium Management
18
Millennium Management
New York
$159M +$129M +204,180 +317%
D.E. Shaw & Co
19
D.E. Shaw & Co
New York
$154M -$17.7M -27,974 -10%
Jennison Associates
20
Jennison Associates
New York
$148M -$33.3M -52,688 -17%
Pictet Asset Management
21
Pictet Asset Management
Switzerland
$136M -$34.9M -55,253 -19%
JFG
22
Jefferies Financial Group
New York
$128M +$157K +248 +0.1%
BAMCO Inc
23
BAMCO Inc
New York
$126M -$18.2M -28,778 -12%
O
24
OrbiMed
New York
$122M +$10.7M +17,000 +9%
1832 Asset Management
25
1832 Asset Management
Ontario, Canada
$108M -$15.1M -24,000 -12%