Ion Beam Applications, SA

Transaction in Own Shares • Aug 27, 2021

IBA – ACQUISITION OF OWN SHARES

Immediate Release – August 27 th, 2021

Louvain-la-Neuve, Belgium, August 27 th, 2021 - 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 June 29th, 2021.

Under this program, IBA has requested a financial intermediary to repurchase up to 250.000 IBA ordinary shares on its behalf under the terms of a discretionary mandate agreement with validity until December 30 th , 2021, effective as from June 30th, 2021, to cover the company's obligations under a long term incentive plan for certain members of its personnel.

In the framework of this share buyback program, IBA repurchased 18.149 IBA shares on Euronext Brussels in the period from August 20th , 2021 up to and including August 26th , 2021, as follows:

Trade date	Shares purchased	Average price	Min price	Max price	Buyback amount
20-08-21	2.242	16,47€	16,38€	16,60€	36.929,33€
23-08-21	1.702	16,47€	16,32€	16,58€	28.034,32€
$24 - 08 - 21$	2.118	16,40€	16,28€	16,48€	34,725,88€
$25 - 08 - 21$	687	16,27€	16,12€	16,70€	11.174,81€
Bloc 25/08	10,000	16,80 €	16,80€	16.80 €	168,000,00€
$26 - 08 - 21$	1.400	17,33€	17,18€	17,50€	24.255,84€
TOTAL	18.149	16,70€	16,12€	17,50€	303.120,18€

These transactions include the purchase of a block of shares on the central order book of Euronext Brussels (XBRU):

• On August 25th at 11.18 AM: 10.000 shares at a price of 16,80 EUR/share;

The total number of shares purchased under this program therefore amounts to 165.943. As a result, the current situation with respect to treasury shares (held directly by IBA SA and indirectly through its subsidiary IBA Investments SCRL) is the following:

	Shares	Voting rights
IBA Investments SCRL	400.503	400.503
IBA SA	586.312	649.681
Total - Treasury shares	986.815	1.050.184
Total - Issued shares	30.133.920	38.254.747
reasury shares in %	3.27%

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About IBA

IBA (Ion Beam Applications S.A.) is a global medical technology company focused on bringing integrated and innovative solutions for the diagnosis and treatment of cancer. The company is the worldwide technology leader in the field of proton therapy, considered to be the most advanced form of radiation therapy available today. IBA's proton therapy solutions are flexible and adaptable, allowing customers to choose from universal full-scale proton therapy centers as well as compact, single room solutions. In addition, IBA has a radiation dosimetry business and develops particle accelerators for the medical world and industry. Headquartered in Belgium and employing about 1,500 people worldwide, IBA has installed systems across the world.

IBA is listed on the pan-European stock exchange NYSE EURONEXT (IBA: Reuters IBAB.BR and Bloomberg IBAB.BB). More information can be found at www.iba-worldwide.com

Contact person IBA Christian Matton, Chief Legal Officer shareholderrelations@iba-group.com

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