Publication made under article 15 of the law of May 2, 2007 relating to the disclosure of major holdings in issuers whose shares are admitted to trading on a regulated market and containing various provisions (Belgian Gazette 12.VI.2007 ) (hereinafter, the “Law”)

  1. ERRATUM as at 25 January 2023

In the press release published on the Company's website in accordance with Article 15 of the Act on 25 January 2023 at 6 p.m., the denominator should read "40.185.368" and not "40.159.157".

  1. Change of denominator on 30 August 2023 (Article 15 of the Act)

"[...] the issuer publishes the total capital, the total number of securities conferring the right to vote and voting rights, as well as, by category, the number of securities conferring the right to vote and voting rights vote, at the latest at the end of each calendar month in which an increase or a decrease in these numbers occurred.

On each publication referred to in the first paragraph, the issuer also mentions, if applicable, the total number of bonds convertible into securities conferring the right to vote and rights materialized or not by securities to the subscription of securities conferring the right to vote not yet issued, the total number of voting rights that would result from the exercise of these conversion or subscription rights and the total number of shares without voting rights. "

At 30 August 2023, the denominator (i.e. the total number of voting rights in issue) was increased from 40.185.368 to 40.595.290, taking into account the double voting rights attached to registered shares which have been registered in the name of their holder in the share register for at least two (2) years, in accordance with Article 28 of the Articles of Association.

3.         Summary to date

 Shares endowed with the right to vote in loyalty: registered shares recorded in the share register for at least two consecutive years in the name of their holder (section 28 of the articles of association, in accordance with section 7:53 of the Companies and Associations Code).

Following the introduction of the loyalty voting right by decision of the general meeting of March 10, 2020, the calculation method used by IBA to determine the number of shares with the loyalty voting right at any time is the LIFO method (last in, first out), namely: for the same registered shareholder, the shares which the latter most recently acquired are the first shares which will be deducted from his “basket” of registered shares if he transfer shares thereafter.

 Statutory ceiling (section 7, paragraph 1, of the articles of association: “No shareholder may, with companies and persons related to him, participate in the voting at general meetings for a number of votes exceeding 35% of the votes attached to all of the shares with voting rights issued by the company”): currently 35% of 38.339.545, i.e. 13.418.840,8 votes.

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 field of proton therapy, considered to be the most advanced form of radiation therapy available today. IBA is also a leading player in the fields of industrial sterilization, radiopharmaceuticals and dosimetry. The company, based in Louvain-la-Neuve, Belgium, employs approximately 1,800 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).

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Valérie Van Impe


+32 479267809