Threshold crossing by the Caisse des dépôts et consignations in ABIONYX PHARMA

On October 3, 2025, a press release revealed that the Caisse des dépôts et consignations (CDC) had crossed the threshold of 5% of ABIONYX PHARMA's voting rights. This threshold was crossed indirectly, via Bpifrance Participations, on September 29, 2025. The CDC now holds 1,508,906 shares, or 4.32% of the capital and 3.54% of the voting rights of ABIONYX PHARMA, after the cancellation of certain double voting rights.

The specific breakdown shows that Bpifrance Participations owns these 1,508,906 shares and voting rights, representing all of CDC's indirect positions. This change is caused by the cancellation of double voting rights in connection with the bearer offering of ABIONYX PHARMA shares. This movement is in line with transparency rules and Article L. 233-7 of the French Commercial Code.