argenx SE (ARGX)

Highly Crowded

Held by 455 of 5,944 reporting institutions (96th percentile) — extremely crowded.

Data as of Q1 2026

Institutional Ownership

46.83%

QoQ Change

-1.59%

Total Value

$18.4T

Shares Outstanding

61.9M

Crowding AnalysisHighly Crowded

Holders455of 5,944

Avg: 68

Uncrowded96th percentileCrowded

Institutional Activity

Buy/Sell Ratio0.86x

91th percentile

236 buying273 selling

+63

New

-97

Closed

-1,031,391

Net shares

Holding Period Distribution

estimate

Median: 3 QAvg: 3.4 QHolders: 455

Ownership Concentration

Top 5: 50.5%Top 10: 64.8%

FMR17.2%

PRICE T ROWE ASSOCIATES11.7%

JANUS HENDERSON GROUP8.8%

Capital World Investors7.8%

Artisan Partners Limited Partnership5.1%

Others (450)49.5%

Loading crowding analysis...

Conviction-Weighted Ownership

Median weight: 0.25%Avg weight: 1.59%Max: 7.18%High conviction (>1%): 3

FMR

PRICE T ROWE ASSOCIATES

JANUS HENDERSON GROUP

Capital World Investors

Artisan Partners Limited Partnership

WELLINGTON MANAGEMENT GROUP LLP

Avoro Capital Advisors

BlackRock,

RTW INVESTMENTS,

Invesco

Loading conviction analysis...

Whale Moves Timeline (8 Quarters)

Biggest dollar-value position changes among top 10 holders

SOLDFMR$439M601K shr

NEWInvesco$434M595K shr

BOUGHTWELLINGTON MANAGEMENT GROUP LLP$250M342K shr

BOUGHTCapital World Investors$248M340K shr

SOLDArtisan Partners Limited Partnership$211M289K shr

NEWBlackRock$619M736K shr

NEWMORGAN STANLEY$436M519K shr

SOLDArtisan Partners Limited Partnership$361M430K shr

SOLDJANUS HENDERSON GROUP$98M117K shr

SOLDFMR$84M100K shr

Loading whale moves...

Institutional Trends (8 Quarters)

Loading ownership trends...

Institutional Holders

Loading top holders...