argenx to Report Half Year 2022 Financial Results and Second Quarter Business Update on July 28, 2022

July 21, 2022

Breda, the Netherlands

– argenx (Euronext & Nasdaq: ARGX), a global immunology company committed to improving the lives of people suffering from severe autoimmune diseases, today announced that it will host a conference call and audio webcast on Thursday, July 28, 2022 at 2:30 pm CET (8:30 am ET) to discuss its half year 2022 financial results and provide a second quarter 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:

Use the

access code

3810049 to join the call. Please dial in 15 minutes prior to the live call.

Belgium                32 800 50 201

United Kingdom        44 800 358 0970

United States                 1 888 415 4250

All other locations 1 929 526 1599

About argenx

argenx is a global immunology company committed to improving the lives of people suffering from severe autoimmune diseases. 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 developed and is commercializing the first-and-only approved neonatal Fc receptor (FcRn) blocker in the U.S. and Japan. The Company is evaluating efgartigimod in multiple serious autoimmune diseases and advancing several earlier stage experimental medicines within its therapeutic franchises. For more information, visit

www.argenx.com

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