Organon Returns Ebopiprant to XOMA

Ad hoc announcement pursuant to Art. 53 LR of the SIX Swiss Exchange

Geneva, Switzerland – October 27, 2023 – ObsEva SA (SIX: OBSN), a biopharmaceutical company developing novel therapies for women's health, today announced that XOMA will be receiving full worldwide rights on ebopiprant, an investigational, orally active, selective prostaglandin F2α (PGF2α) receptor antagonist, following the termination of the license agreement with Organon.