Iba – Acquisition of Own Shares - Completion of the Share Buyback Program

Immediate Release – May 30^th, 2025

Louvain-la-Neuve, Belgium, May 30^th, 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 24^th, 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 31^st, 2025, effective as from March 25^th, 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 16,651 IBA shares on Euronext Brussels in the period from May 27^th, 2025 up to and including May 28^th, 2025, as follows:

Trade date	Shares purchased	Average price	Min price	Max price	Buyback amount
27-05-25	9,000	12.15 €	12.08 €	12.20 €	109,369.80 €
28-05-25	7,651	12.24 €	12.10 €	12.28 €	93,644.41 €
TOTAL	16,651	12.19 €	12.08 €	12.28 €	203,014.21 €

The total number of shares purchased under this program therefore amounts to 650,000, which terminates this program, at an average price of 10.5655 EUR/share. 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		963,579	1,030,002
Total - Treasury shares		1,015,552	1,133,948
Total - Issued shares		30,282,218	40,514,366
Treasury shares in %		3.35%	2.80%

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

Attachment

• 250530-Buyback-IBA-EN