JANUS HENDERSON GROUP PLC

Position in ARGX — Argenx SE

CIK 1274173 LONDON, X0

Back to ARGX Full portfolio

Position in ARGX

as of Mar 31, 2026 · filed May 18, 2026 Compact

Position Value

$1,856,099,791

-$211,093,222 QoQ

Shares Held

2,541,732

+3.4% QoQ

Ownership

4.09%

of shares outstanding

% of Portfolio

0.96%

of 13F equity value

Holder Rank

—

not a current holder

Holding Since

Mar 2020

25 quarters on record

Voting authority Sole 0.ToString("F0")% Shared 95.33483467179073.ToString("F0")% None 4.665165328209269.ToString("F0")%

Common Shares in ARGX Over Time

Shares Held

Position Value (USD)

Position in Biotechnology

Healthcare · as of Mar 31, 2026

JANUS HENDERSON GROUP PLC holds $15,891,244,813 across 182 Biotechnology names. ARGX ranks #1 (11.7% of the industry book) .

#	Ticker	Company	Shares	Value (USD)
1	ARGX	Argenx SE This page	2,541,732	$1,856,099,791
2	PRAX	Praxis Precision Medicines, Inc.	3,458,863	$1,114,411,067
3	MDGL	Madrigal Pharmaceuticals, Inc.	2,018,647	$1,056,701,142
4	BBIO	BridgeBio Pharma, Inc.	13,179,013	$978,673,503
5	PCVX	Vaxcyte, Inc.	16,575,875	$963,224,094
6	VRTX	Vertex Pharmaceuticals Inc / Ma	2,131,527	$951,812,064
7	RVMD	Revolution Medicines, Inc.	9,766,496	$949,791,733
8	MIRM	Mirum Pharmaceuticals, Inc.	6,945,813	$641,654,204

All Filings in ARGX

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25 filing rows on record

Report Date	Value (USD)	Shares	Change	Type	Discretion	Filed
2026-03-31	$1,856,099,791	2,541,732	+3.4%	Shares	Defined	2026-05-18
2025-12-31	$2,067,193,013	2,458,164	-4.5%	Shares	Defined	2026-02-17
2025-09-30	$1,899,402,124	2,575,251	+0.4%	Shares	Defined	2025-11-14
2025-06-30	$1,414,099,235	2,565,399	+19.7%	Shares	Defined	2025-08-14
2025-03-31	$1,268,415,817	2,143,083	-7.3%	Shares	Defined	2025-05-15
2024-12-31	$1,422,100,170	2,312,358	-6.7%	Shares	Defined	2025-02-14
2024-09-30	$1,343,928,527	2,479,207	+0.4%	Shares	Defined	2024-11-14
2024-06-30	$1,061,438,487	2,468,232	+11.3%	Shares	Defined	2024-08-14
2024-03-31	$872,738,647	2,216,648	+24.8%	Shares	Defined	2024-05-15
2023-12-31	$675,932,423	1,776,759	+20.8%	Shares	Defined	2024-02-14
2023-09-30	$723,255,572	1,471,138	-17.5%	Shares	Defined	2023-11-14
2023-06-30	$695,065,133	1,783,453	-0.6%	Shares	Defined	2023-08-14
2023-03-31	$668,710,307	1,794,810	+84.1%	Shares	Defined	2023-05-15
2022-12-31	$369,253,176	974,720	+73.3%	Shares	Defined	2023-02-14
2022-09-30	$198,514,719	562,285	-0.7%	Shares	Defined	2023-01-13
2022-06-30	$214,527,918	566,216	-7.0%	Shares	Defined	2022-08-15
2022-03-31	$192,071,401	609,151	+3.1%	Shares	Defined	2022-05-16
2021-12-31	$206,843,575	590,661	+13.0%	Shares	Defined	2022-02-14
2021-09-30	$157,927,276	522,938	+5.0%	Shares	Defined	2021-11-16
2021-06-30	$149,950,924	498,060	+9.6%	Shares	Defined	2021-08-16
2021-03-31	$125,106,372	454,288	+50.1%	Shares	Defined	2021-05-17
2020-12-31	$88,997,809	302,621	+24.6%	Shares	Defined	2021-02-16
2020-09-30	$63,782,909	242,964	-18.1%	Shares	Defined	2020-11-16
2020-06-30	$66,813,803	296,647	-0.8%	Shares	Defined	2020-08-14
2020-03-31	$39,372,647	298,889	—	Shares	Defined	2020-05-14
No filing history on record for this holder in this stock.