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 449 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	$3.35B 5,663,207 shares	0.21%	+44.98K(+0.80%)Added	SEC filing ↗ May 12, 2025	▾
02	PRICE T ROWE ASSOCIATES INC /MD/ CIK 80255 · View history	$3.19B 5,384,586 shares	0.39%	-132.31K(-2.40%)Reduced	SEC filing ↗ May 14, 2025	▾
03	Artisan Partners Limited Partnership CIK 1466153 · View history	$1.65B 2,785,890 shares	2.67%	-284.11K(-9.30%)Reduced	SEC filing ↗ May 14, 2025	▾
04	JANUS HENDERSON GROUP PLC CIK 1274173 · View history	$1.26B 2,143,083 shares	0.69%	-169.28K(-7.30%)Reduced	SEC filing ↗ May 15, 2025	▾
05	Capital World Investors CIK 1422849 · View history	$1.15B 1,937,992 shares	0.19%	+151.06K(+8.50%)Added	SEC filing ↗ May 12, 2025	▾
06	Avoro Capital Advisors LLC CIK 1633313 · View history	$731.06M 1,235,177 shares	11.41%	-3.29K(-0.30%)Reduced	SEC filing ↗ May 15, 2025	▾
07	BlackRock, Inc. CIK 2012383 · View history	$604.49M 1,021,325 shares	0.01%	-47.63K(-4.50%)Reduced	SEC filing ↗ May 2, 2025	▾
08	MORGAN STANLEY CIK 895421 · View history	$519.15M 877,150 shares	0.04%	-61.39K(-6.50%)Reduced	SEC filing ↗ May 15, 2025	▾
09	RTW INVESTMENTS, LP CIK 1493215 · View history	$398.62M 673,497 shares	6.10%	0(0.00%)Unchanged	SEC filing ↗ May 15, 2025	▾
10	Clearbridge Investments, LLC CIK 1348883 · View history	$393.22M 664,368 shares	0.34%	+34.54K(+5.50%)Added	SEC filing ↗ May 13, 2025	▾
11	Bellevue Group AG CIK 1674546 · View history	$342.62M 578,874 shares	7.68%	-14.31K(-2.40%)Reduced	SEC filing ↗ May 14, 2025	▾
12	CITADEL ADVISORS LLC CIK 1423053 · View history	$326.67M 551,939 shares	0.32%	+37.83K(+7.40%)Added	SEC filing ↗ May 15, 2025	▾
13	WELLINGTON MANAGEMENT GROUP LLP CIK 902219 · View history	$240.42M 406,204 shares	0.05%	-18.77K(-4.40%)Reduced	SEC filing ↗ May 13, 2025	▾
14	Invesco Ltd. CIK 914208 · View history	$226.53M 382,741 shares	0.04%	-21.27K(-5.30%)Reduced	SEC filing ↗ May 12, 2025	▾
15	SEI INVESTMENTS CO CIK 350894 · Amended · View history	$213.66M 361,000 shares	0.27%	-5.62K(-1.50%)Reduced	SEC filing ↗ May 14, 2025	▾
16	BANK OF AMERICA CORP /DE/ CIK 70858 · View history	$201.30M 340,115 shares	0.02%	+81.57K(+31.50%)Added	SEC filing ↗ May 15, 2025	▾
17	LORD, ABBETT & CO. LLC CIK 728100 · View history	$162.59M 274,700 shares	0.58%	+68.50K(+33.20%)Added	SEC filing ↗ May 13, 2025	▾
18	MILLENNIUM MANAGEMENT LLC CIK 1273087 · View history	$158.98M 268,604 shares	0.15%	+204.18K(+316.90%)Added	SEC filing ↗ May 15, 2025	▾
19	D. E. Shaw & Co., Inc. CIK 1009207 · View history	$154.08M 260,325 shares	0.18%	-27.97K(-9.70%)Reduced	SEC filing ↗ May 15, 2025	▾
20	JENNISON ASSOCIATES LLC CIK 53417 · View history	$147.65M 249,461 shares	0.10%	-52.69K(-17.40%)Reduced	SEC filing ↗ May 5, 2025	▾

Showing 20 / 449 institutions. The complete set is available through the API.

Coverage & totals by quarter

Reporting institutions

449

Cancelled or null records excluded

Disclosed shares

33,355,009

Not deduplicated across managers

Disclosed value

$19.73B

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 · Q1 2025

Explore all 449 reporting institutions.

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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.