Company · Ownership research

ARGENX SE ARGX

CIK 0001697862 · CUSIP 04016X101

Insider tradingInitial holdingsInstitutional holders

Quarter-end disclosures, not live holdings.

Several CUSIPs are reported for this company; this page shows CUSIP 04016X101 (ARGX), not CUSIP 04016X901 (ARGX), CUSIP 04016X951 (ARGX), CUSIP N0610Q109 (ARGNF), and does not merge CUSIPs.

This page lists the top 20 of 469 rows by value; the complete set is available through the API.

Some filings reported values in thousands; those figures were scaled ×1,000 to dollars.

Top 20 institutions

Weight means this stock's share of the manager's own portfolio.

By reported value

#	Manager	Value	Manager weight	Change vs prior	Source
01	FMR LLC CIK 315066 · View history	$4.20B 5,692,346 shares	0.22%	+268.84K(+5.00%)Added	SEC filing ↗ Nov 13, 2025	▾
02	PRICE T ROWE ASSOCIATES INC /MD/ CIK 80255 · View history	$2.69B 3,640,409 shares	0.29%	-1.34M(-26.90%)Reduced	SEC filing ↗ Nov 14, 2025	▾
03	JANUS HENDERSON GROUP PLC CIK 1274173 · View history	$1.90B 2,575,251 shares	0.87%	+9.85K(+0.40%)Added	SEC filing ↗ Nov 14, 2025	▾
04	Artisan Partners Limited Partnership CIK 1466153 · View history	$1.61B 2,186,510 shares	2.32%	-163.27K(-6.90%)Reduced	SEC filing ↗ Nov 12, 2025	▾
05	Capital World Investors CIK 1422849 · View history	$1.45B 1,959,504 shares	0.20%	+8.42K(+0.40%)Added	SEC filing ↗ Nov 13, 2025	▾
06	Avoro Capital Advisors LLC CIK 1633313 · View history	$730.18M 990,000 shares	9.45%	-185.00K(-15.70%)Reduced	SEC filing ↗ Nov 14, 2025	▾
07	Clearbridge Investments, LLC CIK 1348883 · View history	$558.23M 756,862 shares	0.42%	-16.00K(-2.10%)Reduced	SEC filing ↗ Nov 13, 2025	▾
08	WELLINGTON MANAGEMENT GROUP LLP CIK 902219 · View history	$538.41M 729,986 shares	0.09%	+324.65K(+80.10%)Added	SEC filing ↗ Nov 14, 2025	▾
09	CITADEL ADVISORS LLC CIK 1423053 · View history	$526.29M 713,559 shares	0.42%	-152.41K(-17.60%)Reduced	SEC filing ↗ Nov 14, 2025	▾
10	RTW INVESTMENTS, LP CIK 1493215 · View history	$496.74M 673,497 shares	6.12%	0(0.00%)Unchanged	SEC filing ↗ Nov 14, 2025	▾
11	Bellevue Group AG CIK 1674546 · View history	$402.95M 546,328 shares	8.37%	-24.71K(-4.30%)Reduced	SEC filing ↗ Nov 14, 2025	▾
12	BlackRock, Inc. CIK 2012383 · View history	$386.33M 523,801 shares	0.01%	-26.34K(-4.80%)Reduced	SEC filing ↗ Nov 12, 2025	▾
13	MORGAN STANLEY CIK 895421 · Amended · View history	$320.92M 435,106 shares	0.02%	+5.82K(+1.40%)Added	SEC filing ↗ May 27, 2026	▾
14	MILLENNIUM MANAGEMENT LLC CIK 1273087 · View history	$256.32M 347,518 shares	0.20%	-82.33K(-19.20%)Reduced	SEC filing ↗ Nov 14, 2025	▾
15	BANK OF AMERICA CORP /DE/ CIK 70858 · Amended · View history	$252.53M 342,379 shares	0.02%	+6.26K(+1.90%)Added	SEC filing ↗ Feb 3, 2026	▾
16	SEI INVESTMENTS CO CIK 350894 · View history	$230.32M 312,268 shares	0.25%	-4.13K(-1.30%)Reduced	SEC filing ↗ Nov 13, 2025	▾
17	TWO SIGMA INVESTMENTS, LP CIK 1179392 · View history	$216.96M 294,160 shares	0.33%	+250.28K(+570.30%)Added	SEC filing ↗ Nov 14, 2025	▾
18	FRANKLIN RESOURCES INC CIK 38777 · View history	$190.49M 258,274 shares	0.05%	-21.53K(-7.70%)Reduced	SEC filing ↗ Nov 13, 2025	▾
19	JENNISON ASSOCIATES LLC CIK 53417 · View history	$177.18M 240,228 shares	0.10%	-24.42K(-9.20%)Reduced	SEC filing ↗ Oct 30, 2025	▾
20	AMERICAN CENTURY COMPANIES INC CIK 748054 · View history	$169.47M 229,770 shares	0.09%	+23.86K(+11.60%)Added	SEC filing ↗ Nov 12, 2025	▾

Showing 20 / 469 institutions. The complete set is available through the API.

Coverage & totals by quarter

Reporting institutions

469

Cancelled or null records excluded

Disclosed shares

30,519,433

Not deduplicated across managers

Disclosed value

$22.52B

Not market cap or free float

Reporting institutions by quarter

Counts also change with data coverage and reporting entities; they do not measure net buying. Distinct managers with a live stock row in this CUSIP; totals may include overlapping filings and are not a share of the company.

ARGENX SE · Q3 2025

Explore all 469 reporting institutions.

This page includes 20 of 469 reporting institutions. Log in to look up the full history beyond 3 years, use advanced screening & filtering, download CSV, and get the complete set through the Akkru API.

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Sources, coverage & how to read this data

Figures are as reported to the SEC and merged with later amendments where Akkru could match them. Preview limits apply to what is listed, not to the totals, which come from the complete reported data. Nothing is zero-filled: a missing quarter or month is shown as missing.