IBA – ACQUISITION OF OWN SHARES - February 16, 2026

Louvain-la-Neuve, Belgium, February 16 th , 2026 – 6 PM CET – 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 2 nd , 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 30 th , 2026 (included), effective as from February 3 rd , 2026, to cover the company’s obligations under long-term incentive plans for management and certain members of its personnel. In the framework of this share buyback program, IBA repurchased 26,054 IBA shares on Euronext Brussels in the period from February 9 th , 2026, up to and including February 13 th , 2026, as follows: Trade date Shares purchased Average price Min price Max price Buyback amount 09-02-26 6,054 14.88 € 14.80 € 15.20 € 90,065.36 € 10-02-26 5,000 15.20 € 14.86 € 15.30 € 76,023.50 € 11-02-26 5,000 15.22 € 15.12 € 15.32 € 76,086.00 € 12-02-26 5,000 15.37 € 15.26 € 15.50 € 76,866.00 € 13-02-26 5,000 15.38 € 15.20 € 15.42 € 76,886.50 € TOTAL 26,054 15.20 € 14.80 € 15.50 € 395,927.36 € The total number of shares purchased under this program therefore amounts to 42,665 since this is the second week of execution. As a result, the current situation with respect to treasury shares (held directly by IBA SA and indirectly through its subsidiary IBA Investments SRL) after also taking into consideration recent movements resulting from the exercise of stock options, is the following : Shares Voting rights IBA Investments SRL 51,973 103,946 IBA SA 948,394 1,014,817 Total – Treasury shares 1,000,367 1,118,763 Total - Issued shares 30,282,218 40,514,366 Treasury shares in % 3.30% 2.76% About IBA IBA (Ion Beam Applications S.A.) is the world leader in particle accelerator technology. The company is the leading supplier of equipment and services in the fields of proton therapy, considered as one of the most advanced forms of radiation therapy available today, as well as industrial sterilization, radiopharmaceuticals and dosimetry. The company, based in Louvain-la-Neuve, Belgium, employs approximately 2,100 people worldwide. IBA is a certified B Corporation (B Corp) meeting the highest standards of verified social and environmental performance. IBA is listed on the pan-European stock exchange EURONEXT (IBA: Reuters IBAB.BR and Bloomberg IBAB.BB). More information can be found at: www.iba-worldwide.com Contact person IBA Thomas Pevenage, Investor Relations investorrelations@iba-group.com Attachment 20260216-Acquisition-Own-Shares-EN