ERYTECH Provides Update on the Announced Combination with PHERECYDES

In relation with the announced merger of PHERECYDES into ERYTECH (the “Proposed Merger”), ERYTECH and PHERECYDES entered into a merger agreement on May 15, 2023, pursuant to which PHERECYDES will be merged into ERYTECH and PHERECYDES shareholders will receive 15 new ERYTECH shares for every 4 PHERECYDES shares they own (the “Merger Agreement”).