Ion Beam Applications, SA

Transaction in Own Shares • May 19, 2025

IBA – ACQUISITION OF OWN SHARES

Immediate Release – May 19th, 2025

Louvain-la-Neuve, Belgium, May 19th, 2025 - 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 March 24th, 2025.

Under this program, IBA has requested a financial intermediary to repurchase up to 650,000 IBA ordinary shares on its behalf under the terms of a mandate with validity until December 31st, 2025, effective as from March 25th, 2025, 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 26,500 IBA shares on Euronext Brussels in the period from May 13th, 2025 up to and including May 19th, 2025, as follows:

Trade date	Shares purchased	Average price	Min price	Max price	Buyback amount
13-05-25	0
14-05-25	3,000	11.58 €	11.54 €	11.60 €	34,752.30 €
15-05-25	7,000	11.41 €	11.34 €	11.50 €	79,888.20 €
16-05-25	7,000	11.38 €	11.34 €	11.44 €	79,645.30 €
19-05-25	9,500	11.20 €	11.16 €	11.36 €	106,440.85 €
TOTAL	26,500	11.35 €	11.16 €	11.60 €	300,726.65 €

The total number of shares purchased under this program therefore amounts to 582,849, following this eighth 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) is the following :

	Shares	Voting rights
IBA Investments SRL	51,973	103,946
IBA SA	896,428	962,851
Total - Treasury shares	948,401	1,066,797
Total - Issued shares	30,282,218	40,514,366
Treasury shares in %	3.13%	2.63%

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 the most advanced form 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