RTW INVESTMENTS, LP

CIK

1493215

City

NEW YORK

State / Country

Stock

ARGX — Argenx SE

Top Portfolio Positions

87 positions · $10,049,745,359 total · as of Mar 31, 2026

Ticker	Company	Shares	Value (USD)	% of Portfolio
MDGL	Madrigal Pharmaceuticals, Inc. Healthcare	1,993,687	$1,043,635,333	10.38%
INSM	INSMED Inc Healthcare	4,842,880	$791,907,737	7.88%
PTGX	Protagonist Therapeutics, Inc Healthcare	5,059,053	$533,224,186	5.31%
PTCT	Ptc Therapeutics, Inc. Healthcare	7,746,415	$527,763,253	5.25%
ARGX	Argenx SE Healthcare	709,446	$518,072,941	5.16%
CGON	CG Oncology, Inc. Healthcare	6,984,808	$472,731,805	4.70%
CELC	Celcuity Inc. Healthcare	3,039,621	$346,942,340	3.45%
TNGX	Tango Therapeutics, Inc. Healthcare	13,300,620	$278,248,970	2.77%
ERAS	Erasca, Inc. Healthcare	16,157,175	$261,423,091	2.60%
NTRA	Natera, Inc. Healthcare	1,250,000	$249,987,500	2.49%

25 quarters · across all stocks

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25 of 25 shown

Report Date	Value (USD)	Shares	Change	Type	Discretion	Filed
2026-03-31	$518,072,941	709,446	+5.3%	Shares	Sole	2026-05-15
2025-12-31	$566,377,302	673,497	0.0%	Shares	Sole	2026-02-17
2025-09-30	$496,744,447	673,497	0.0%	Shares	Sole	2025-11-14
2025-06-30	$371,245,016	673,497	0.0%	Shares	Sole	2025-08-14
2025-03-31	$398,619,301	673,497	0.0%	Shares	Sole	2025-05-15
2024-12-31	$414,200,655	673,497	+2.9%	Shares	Sole	2025-02-14
2024-09-30	$354,753,414	654,430	0.0%	Shares	Sole	2024-11-14
2024-06-30	$281,431,077	654,430	-1.9%	Shares	Sole	2024-08-14
2024-03-31	$262,688,015	667,195	0.0%	Shares	Sole	2024-05-15
2023-12-31	$253,820,993	667,195	+31.5%	Shares	Sole	2024-02-14
2023-09-30	$249,352,277	507,195	+5.2%	Shares	Sole	2023-11-14
2023-06-30	$187,925,857	482,195	0.0%	Shares	Sole	2023-08-14
2023-03-31	$179,656,213	482,195	0.0%	Shares	Sole	2023-05-15
2022-12-31	$182,669,931	482,195	+3.2%	Shares	Sole	2023-02-14
2022-09-30	$164,943,194	467,195	+5.5%	Shares	Sole	2022-11-14
2022-06-30	$167,705,548	442,635	+31.4%	Shares	Sole	2022-08-15
2022-03-31	$106,252,533	336,978	+6.2%	Shares	Sole	2022-05-16
2021-12-31	$111,166,764	317,447	+126.2%	Shares	Sole	2022-02-14
2021-09-30	$42,373,922	140,311	+341.9%	Shares	Sole	2021-11-15
2021-06-30	$9,559,574	31,752	0.0%	Shares	Sole	2021-08-13
2021-03-31	$8,744,183	31,752	0.0%	Shares	Sole	2021-05-14
2020-12-31	$9,337,945	31,752	0.0%	Shares	Sole	2021-02-16
2020-09-30	$8,335,535	31,752	0.0%	Shares	Sole	2020-11-16
2020-06-30	$7,151,502	31,752	0.0%	Shares	Sole	2020-08-14
2020-03-31	$4,182,690	31,752	—	Shares	Sole	2020-05-15
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