ObsEva Announces Wind-Down of Operations and Notifies SIX that it Will Lack the Resources to Establish Audited IFRS Financial Statements for 2023

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

Geneva, Switzerland – 28 February 2024 – ObsEva SA (SIX: OBSN), a biopharmaceutical company developing novel therapies for women's health, today announced that it will wind-down its operations with the termination of all of its employees, including Fabien de Ladonchamps, CEO, and notified SIX Swiss Exchange's listing authority that there was a substantial risk that it will lack the resources to have financial statements for 2023 prepared under IFRS audited, and that it is as a result likely not going to be able to satisfy the requirements for maintaining its listing on SIX. Fabien de Ladonchamps, CEO, will remain in function during the notice period for the duration of the moratorium process and beyond, as needed.