July 16, 2026

Amsterdam, 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 23, 2026 at 2:30 p.m. CET (8:30 a.m. ET) to discuss its half year 2026 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 presentation.

Participants can access the conference call by dialing 800-590-8290 (United States and Canada) or 240-690-8800 (International). Country specific dial-in numbers are listed below:

Belgium                32 2290 4635

France                        33 172 001717

Netherlands                31 20 795 2683

United Kingdom        44 203 393 1560

Japan                        81 3 4520 9761

Switzerland                41 43 210 51 68

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

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 approved neonatal Fc receptor (FcRn) blocker and is evaluating its broad potential in multiple serious autoimmune diseases while advancing several earlier stage experimental medicines within its therapeutic franchises. For more information, visit www.argenx.com and follow us on LinkedIn, Instagram, Facebook, and YouTube.

Contacts

Media:

Ben Petok

bpetok@argenx.com

Investors:

Alexandra Roy

aroy@argenx.com