Abivax Announces Closing of $747.5 Million Public Offering

Abivax Announces Closing of $747.5 Million Public Offering

PARIS, France, July 28, 2025 – 10:15 p.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 the closing of its previously announced underwritten public offering of 11,679,400 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”), which includes the full exercise of the underwriters’ option to purchase additional ADSs (the “Underwriters’ Option”). The aggregate gross proceeds, after exercise of the Underwriters’ Option, amounted to approximately $747.5 million, equivalent to approximately €637.5 million¹, before deduction of underwriting commissions and estimated expenses payable by the Company, and the estimated net proceeds, after deducting underwriting commissions and estimated offering expenses payable by the Company, will be approximately $700.3 million, equivalent to approximately €597.2 million1. All of the ADSs in the Offering were offered by Abivax.