ObsEva Appoints Fabien de Ladonchamps as Chief Executive Officer

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

GENEVA, Switzerland – May 2, 2023 – ObsEva SA (SIX: OBSN), a biopharmaceutical company developing novel therapies for women’s health, today announced that Fabien de Ladonchamps has been appointed Chief Executive Officer effective May 1, 2023. Mr. de Ladonchamps succeeds Will Brown who previously held the position of Interim Chief Executive Officer and Chief Financial Officer. Mr. Brown, who leaves his functions and the Executive Committee with immediate effect, will serve as a strategic advisor to the Company for the following six months to aid in the transition.