UNITED STATESSECURITIES AND EXCHANGE COMMISSIONWASHINGTON, D.C. 20549 FORM 6-K REPORT OF FOREIGN PRIVATE ISSUERPURSUANT TO RULE 13a-16 OR 15d-16UNDER THE SECURITIES EXCHANGE ACT OF 1934For the Month of February 2026Commission File Number: 001-38097 ARGENX SE (Translation of registrant’s name into English) Laarderhoogtweg 251101 EB Amsterdam, the Netherlands (Address of principal executive offices) Indicate by check mark whether the registrant files or will file annual reports under cover of Form 20-F or Form 40-F.Form 20-F ⌧ Form 40-F ☐ Indicate by check mark if the registrant is submitting the Form 6-K in paper as permitted by Regulation S-T Rule 101(b) (1): ☐ Indicate by check mark if the registrant is submitting the Form 6-K in paper as permitted by Regulation S-T Rule 101(b)(7): ☐STATES

~~EXPLANATORY~~SECURITIES ~~NOTE~~AND OnEXCHANGE February 26, 2026, argenx SE (the “Company’’) issued a press release, an investor presentation and its full year 2025 unaudited financial results, copies of which are attached hereto as Exhibits 99.1, Exhibit 99.2 and Exhibit 99.3, respectively, and are incorporated by reference herein. The information contained in this Current Report on Form 6-K, including Exhibit 99.1, Exhibit 99.2 and Exhibit 99.3, shall be deemed to be incorporated by reference into the Company’s Registration Statements on Form S-8 (File Nos. 333-292200, 333-225375, 333-258253, and 333-274721), and to be part thereof from the date on which this Current Report on Form 6-K is filed, to the extent not superseded by documents or reports subsequently filed or furnished.COMMISSION

EXHIBITS
Exhibit						Description
99.1						Press Release dated February 26, 2026
99.2						Investor Presentation dated February 26, 2026
99.3						Unaudited Full Year 2025 Financial Results

WASHINGTON, D.C. 20549

FORM 6-K

REPORT OF FOREIGN PRIVATE ISSUER

PURSUANT TO RULE 13a-16 OR 15d-16

UNDER THE SECURITIES EXCHANGE ACT OF 1934

For the Month of March 2026

Commission File Number: 001-38097

ARGENX SE

(Translation of registrant’s name into English)

Laarderhoogtweg 25
1101 EB Amsterdam, the Netherlands

(Address of principal executive offices)

Indicate by check mark whether the registrant files or will file annual reports under cover of Form 20-F or Form 40-F.

Form 20-F x Form 40-F ¨

Indicate by check mark if the registrant is submitting the Form 6-K in paper as permitted by Regulation S-T Rule 101(b)(1): ¨

Indicate by check mark if the registrant is submitting the Form 6-K in paper as permitted by Regulation S-T Rule 101(b)(7): ¨

EXPLANATORY NOTE

On March 6, 2026, argenx SE (the “Company”) issued a press release, a copy of which is attached hereto as Exhibit 99.1 and is incorporated by reference herein.

The information contained in this Current Report on Form 6-K, including Exhibit 99.1, shall be deemed to be incorporated by reference into the Company’s Registration Statements on Forms S-8 (File Nos. 333-225375, 333-258253, 333-274721, and 333-292200), and to be part thereof from the date on which this Current Report on Form 6-K is filed, to the extent not superseded by documents or reports subsequently filed or furnished.

Exhibit		Description

99.1		Press Release March 6, 2026

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized.

	ARGENX SE			~~ARGENX SE~~
Date: February 26, 2026			By:	/s/ Hemamalini (Malini) Moorthy
Date: March 6, 2026	By:	/s/ Hemamalini (Malini) Moorthy
		Name: Hemamalini (Malini) Moorthy		~~Name: Hemamalini (Malini) Moorthy~~
		Title: General Counsel		~~Title: General Counsel~~

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