Abivax Announces Full Exercise of Underwriters’ Option to Purchase Additional ADSs, Bringing Gross Proceeds of Offering to $747.5M (€637.5M)

Abivax Announces Full Exercise of Underwriters’ Option to Purchase Additional ADSs, Bringing Gross Proceeds of Offering to $747.5M (€637.5M)

PARIS, France, July 25, 2025 – 08:00 a.m. (CEST) – Abivax SA (Euronext Paris: FR0012333284 – ABVX) (“Abivax” or the “Company”), a clinical-stage biotechnology company focused on developing therapeutics that harness the body’s natural regulatory mechanisms to modulate the immune response in patients with chronic inflammatory diseases, today announces that the underwriters of its offering of 10,156,000 American Depositary Shares (“ADSs”), each representing one ordinary share, €0.01 nominal value per share (each an “Ordinary Share”), of the Company, in the United States (the “Offering”) have exercised in full their option to purchase 1,523,400 additional ADSs (the “Additional ADSs”), each representing one Ordinary Share. The Additional ADSs will be delivered concurrently with the closing of the Offering, which is expected to occur on July 28, 2025.