ABIVAX

Report Publication Announcement • Apr 30, 2018

ABIVAX announces the publication of its 2018 Registration Document

Paris, April 30th, 2018 at 6:00pm (CEST) – ABIVAX (Euronext Paris: FR0012333284 – ABVX), a biotechnology company harnessing the immune system to develop a functional cure for HIV and treatments for inflammatory diseases and cancer, announced today the publication of its 2018 Registration Document, filed with the French Market Authority (Autorité des Marchés Financiers) on April 27, 2018 under the registration number: R.18-038.

The Registration Document includes the 2017 Annual Financial Report and the progress of its product portfolio under development. Copies of this document are available to the public free of charge upon request at ABIVAX's headquarters – 5, rue de la Baume, 75008 Paris – and online on the Company's website (www.abivax.com) and the AMF website (www.amf-france.org).

The company also highlights below the development stage of its compounds portfolio:

About ABIVAX (www.abivax.com)

ABIVAX is mobilizing the body's natural immune machinery to treat patients with viral infections, autoimmune diseases and cancer. A clinical-stage company, ABIVAX leverages its antiviral and immune enhancing platforms to optimize candidates to cure HIV and treat inflammatory bowel diseases, as well as liver cancer. ABIVAX is listed on Euronext compartment B (ISIN: FR0012333284 – Mnémo: ABVX). More information on the company is available at www.abivax.com/en. Follow us on Twitter @ABIVAX_

Contacts

ABIVAX Finance Didier Blondel didier.blondel@abivax.com +33 1 53 83 08 41

Communication Agency ALIZE RP Aurore Gangloff / Tatiana Vieira abivax@alizerp.com +33 6 64 18 99 59/+33 1 44 54 36 66 Investors LifeSci Advisors Chris Maggos chris@lifesciadvisors.com +41 79 367 6254