argenx N.V. (Euronext Brussels: ARGX), a clinical-stage biopharmaceutical company focused on creating and developing differentiated therapeutic antibodies for the treatment of cancer and severe autoimmune diseases, today announced that it filed a registration statement on Form F-1 with the U.S. Securities and Exchange Commission for a proposed public offering in the United States of its American Depositary Shares (ADSs) representing ordinary shares. All ADSs to be sold in the offering will be offered by argenx. The offering is subject to market and other conditions, including the effectiveness of the above-referenced registration statement. argenx’s ordinary shares are currently listed on Euronext Brussels and argenx has made an application to have its ADSs listed on the NASDAQ Stock Market under the symbol “ARGX”.

Cowen and Company and Piper Jaffray & Co. are acting as joint bookrunning managers for the proposed offering, and JMP Securities and Wedbush PacGrow are acting as co-managers. Kempen & Co is acting as argenx’s advisor in connection with the proposed offering.

About argenx

argenx is a clinical-stage biotechnology company developing a deep pipeline of differentiated antibody-based therapies for the treatment of severe autoimmune diseases and cancer. We are focused on developing product candidates with the potential to be either first-in-class against novel targets or best-in-class against known, but complex, targets in order to treat diseases with a significant unmet medical need. Our ability to execute on this focus is enabled by our suite of differentiated technologies. Our SIMPLE Antibody(TM) Platform, based on the powerful llama immune system, allows us to exploit novel and complex targets, and our three antibody engineering technologies are designed to enable us to expand the therapeutic index of our product candidates.