IBA - ACQUISITION OF OWN SHARES

Louvain-la-Neuve, Belgium, June 1st, 2026- 9 PM CEST - In accordance with article 8:4 of the Royal Decree of 29 April 2019 executing the Belgian Code on Companies and Associations, Ion Beam Applications SA ("IBA”) hereby discloses information in relation to its share buyback program announced on February 2nd, 2026. Under this program, IBA has requested a financial intermediary to repurchase up to 400,000 IBA ordinary shares on its behalf under the terms of a mandate with validity until September