BlackRock crosses thresholds in ABIVAX's capital

On September 22, 2026, BlackRock, Inc., an American asset management firm, crossed below the 5% threshold of ABIVAX's share capital and voting rights. This action was formalized by a letter received on September 23, 2026. The post-crossing threshold is 4,005,135 shares, representing 4.59% of ABIVAX's share capital and 4.52% of its voting rights.

This breach follows an off-market sale of ABIVAX shares. Furthermore, the company has reduced the number of shares held as collateral. BlackRock acts on behalf of its clients and managed funds, which also hold shares in the form of ADRs and through various financial instruments such as contracts for difference (CFDs) and securities lending agreements.