(Article 14, paragraph 1 of the law of 2 May 2007 on the disclosure of major holdings)
Louvain-la-Neuve, Belgium, May 5th, 2026 – 6 p.m.
Summary of the notification
IBA (Ion Beam Applications), the world’s leading provider of proton therapy solutions for the treatment of cancer, announces that it has to issue a transparency notification, in accordance with Article 14, al. 1 of the Transparency Law of May 2, 2007 on disclosure of major holdings, further to the notification received on May 5, 2026.
IBA SA and IBA Investments SRL exceeded the 3% threshold on 24/04/2026.
Content of the notification
Reason for the notification: Acquisition or disposal of securities or voting rights
Notification by: A parent company or controlling person
Persons subject to the notification requirement:
Date on which the threshold is crossed: 24/04/2026
Threshold crossed (in %) : 3%
Denominator : 40.514.619
Notified details: (extract of the received notification form)
Full chain of controlled undertakings through which the holding is effectively held
IBA Investments SRL is a 100% owned subsidiary of Ion Beam Applications SA.
IBA SA is not a controlled entity.
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 2,300 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