February 23, 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 Karen Massey, Chief Operating Officer, will participate in a fireside chat at the TD Cowen 46^th Annual Healthcare Conference on Monday, March 2 at 11:50 a.m. ET.

A live webcast of the presentation 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 30 days following the presentation.

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

argenx to Present at TD Cowen 46th Annual Healthcare Conference