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 397 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	$3.46B 5,618,222 shares	0.21%	+824.75K(+17.20%)Added	SEC filing ↗ Feb 13, 2025	▾
02	PRICE T ROWE ASSOCIATES INC /MD/ CIK 80255 · View history	$3.39B 5,516,894 shares	0.39%	-303.65K(-5.20%)Reduced	SEC filing ↗ Feb 14, 2025	▾
03	Artisan Partners Limited Partnership CIK 1466153 · View history	$1.89B 3,069,995 shares	2.91%	-443.25K(-12.60%)Reduced	SEC filing ↗ Feb 12, 2025	▾
04	JANUS HENDERSON GROUP PLC CIK 1274173 · View history	$1.42B 2,312,358 shares	0.72%	-166.85K(-6.70%)Reduced	SEC filing ↗ Feb 14, 2025	▾
05	Capital World Investors CIK 1422849 · View history	$1.10B 1,786,936 shares	0.17%	+86.69K(+5.10%)Added	SEC filing ↗ Feb 13, 2025	▾
06	Avoro Capital Advisors LLC CIK 1633313 · View history	$761.66M 1,238,467 shares	10.77%	0(0.00%)Unchanged	SEC filing ↗ Feb 14, 2025	▾
07	BlackRock, Inc. CIK 2012383 · View history	$657.40M 1,068,950 shares	0.01%	-55.87K(-5.00%)Reduced	SEC filing ↗ Feb 7, 2025	▾
08	MORGAN STANLEY CIK 895421 · Amended · View history	$577.20M 938,538 shares	0.04%	+7.79K(+0.80%)Added	SEC filing ↗ May 15, 2025	▾
09	RTW INVESTMENTS, LP CIK 1493215 · View history	$414.20M 673,497 shares	6.26%	+19.07K(+2.90%)Added	SEC filing ↗ Feb 14, 2025	▾
10	Clearbridge Investments, LLC CIK 1348883 · View history	$387.34M 629,828 shares	0.31%	+40.33K(+6.80%)Added	SEC filing ↗ Feb 12, 2025	▾
11	Bellevue Group AG CIK 1674546 · View history	$364.81M 593,184 shares	7.02%	-39.65K(-6.30%)Reduced	SEC filing ↗ Feb 14, 2025	▾
12	CITADEL ADVISORS LLC CIK 1423053 · View history	$316.17M 514,105 shares	0.29%	-100.82K(-16.40%)Reduced	SEC filing ↗ Feb 14, 2025	▾
13	T. Rowe Price Investment Management, Inc. CIK 1897612 · View history	$300.03M 487,853 shares	0.19%	-283.72K(-36.80%)Reduced	SEC filing ↗ Feb 14, 2025	▾
14	Paradigm Biocapital Advisors LP CIK 1855655 · View history	$296.00M 481,305 shares	10.30%	+931(+0.20%)Added	SEC filing ↗ Feb 14, 2025	▾
15	WELLINGTON MANAGEMENT GROUP LLP CIK 902219 · Amended · View history	$261.36M 424,974 shares	0.05%	-57.37K(-11.90%)Reduced	SEC filing ↗ Feb 12, 2025	▾
16	Invesco Ltd. CIK 914208 · View history	$248.47M 404,016 shares	0.05%	-29.50K(-6.80%)Reduced	SEC filing ↗ Feb 13, 2025	▾
17	SEI INVESTMENTS CO CIK 350894 · View history	$225.47M 366,620 shares	0.29%	-14.07K(-3.70%)Reduced	SEC filing ↗ Feb 11, 2025	▾
18	JENNISON ASSOCIATES LLC CIK 53417 · View history	$185.82M 302,149 shares	0.11%	+64.18K(+27.00%)Added	SEC filing ↗ Jan 24, 2025	▾
19	D. E. Shaw & Co., Inc. CIK 1009207 · View history	$177.30M 288,299 shares	0.20%	+186.70K(+183.80%)Added	SEC filing ↗ Feb 14, 2025	▾
20	Pictet Asset Management Holding SA CIK 1993888 · View history	$175.09M 284,694 shares	0.19%	-66.91K(-19.00%)Reduced	SEC filing ↗ Feb 12, 2025	▾

Showing 20 / 397 institutions. The complete set is available through the API.

Coverage & totals by quarter

Reporting institutions

397

Cancelled or null records excluded

Disclosed shares

34,127,914

Not deduplicated across managers

Disclosed value

$20.99B

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 · Q4 2024

Explore all 397 reporting institutions.

This page includes 20 of 397 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.