ARGX: 6-K company filing

argx-20260630 UNITED STATES SECURITIES AND EXCHANGE COMMISSION 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 July 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 ⌧ 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): ☐ argenx SE On July 23, 2026, argenx SE (the “ Company ) issued a press release, unaudited first half-year financial results for 2026, which are further described in an Unaudited Interim Report for the Six Months Ended June 30, 2026, and an investor presentation copies of which are attached hereto as Exhibits 99.1, 99.2 and 99.3, respectively, and are incorporated by reference herein. The information contained in this Current Report on Form 6-K, including Exhibit 99.1 and Exhibit 99.2, shall be deemed to be incorporated by reference into the Company’s Registration Statements on Form 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333-292200 ), and to be part thereof from the date on which this Current Report on Form 6-K is filed, to the extent not superseded by documents or reports subsequently filed or furnished. EXHIBITS Exhibit Description 99.1 Press Release dated July 23 , 202 6 99.2 Unaudited Interim Report for the Six Months Ended June 30 , 202 6 99.3 Inves