October 15, 2020 Breda, the Netherlands / Ghent, Belgium – argenx (Euronext & Nasdaq: ARGX), a global immunology company committed to improving the lives of people suffering from severe autoimmune diseases and cancer, today announced that it will host a conference call and audio webcast on Thursday, October 22, 2020 at 2:30 p.m. CET (8:30 a.m. ET) to discuss its third quarter 2020 financial results and provide a business update.

A webcast of the live call may be accessed on the Investors section of the argenx website at argenx.com/investors. A replay of the webcast will be available on the argenx website for approximately one year following the call.

Dial-in numbers:Please dial in 15 minutes prior to the live call.

Belgium                                0800 389 13 France                                  0805 102 319 Netherlands                       0800 949 4506 United Kingdom               0800 279 9489 United States                   1 866 270 1533International                    1 412 317 0797

About argenxargenx is a global immunology company committed to improving the lives of people suffering from severe autoimmune diseases and cancer. Partnering with leading academic researchers through its Immunology Innovation Program (IIP), argenx aims to translate immunology breakthroughs into a world-class portfolio of novel antibody-based medicines. argenx is evaluating efgartigimod in multiple serious autoimmune diseases, and cusatuzumab in hematological cancers in collaboration with Janssen. argenx is also advancing several earlier stage experimental medicines within its therapeutic franchises. argenx has offices in Belgium, the United States, and Japan. For more information, visit www.argenx.com and follow us on LinkedIn at https://www.linkedin.com/company/argenx/.

For further information, please contact:

Beth DelGiacco, Vice President, Investor Relations (US)+1 518 424 4980bdelgiacco@argenx.com

Joke Comijn, Director Corporate Communications & Investor Relations (EU)+32 (0)477 77 29 44+32 (0)9 310 34 19jcomijn@argenx.com