Ion Beam Applications, SA

Major Shareholding Notification • Jan 9, 2024

IBA – TRANSPARENCY NOTIFICATION

(Article 14, paragraph 1 of the law of 2 May 2007 on the disclosure of major holdings)

Louvain-la-Neuve, Belgium, January 9 th , 2024, 18:00

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 December 5 th 202'.

In its notification, Vallcara Limited indicated that following an acquisition or disposal of securities or voting rights, its total shareholding in IBA SA had increased and its shareholding in IBA shares with voting rights had crossed the threshold of 1% on 02/01/2024.

Content of the notification

• Reason for the notification: Acquisition or disposal of securities or voting rights
• Notification by: A person notifying alone A parent undertaking or a controlling person
• Persons subject to the notification requirement:

Name	Address (for legal entities)
Vallcara Limited (owned 100% by Vallgesa Limited)	T6 F09, TIGNE POINT, SLIEMA TP 01, MALTA
Vallgesa Limited	T6 F09, TIGNE POINT, SLIEMA TP 01, MALTA

• Date on which the threshold is crossed: 02/01/2024
• Threshold crossed (in %) : 1%
• Denominator : 40.595.290
• Notified details: (extract of the received notification form)

A) Voting rights	Previous notification		After the transaction
	# of voting rights	# of voting rights		% of voting rights
Holders of voting rights		Linked to securities	Not linked to the securities	Linked to securities	Not linked to the securities
Vallcara Limited owned 100% by Vallgesa Limited		563,694	0	1.39%	0.00%
TOTAL		563,694	0	1.39%	0.00%

Press release | 09//01/ 2024

IBA | Ion Beam Applications SA Chemin du Cyclotron, 3 | 1348 Louvain-la-Neuve | Belgium | RPM Brabant-wallon VAT : 0428.750.985 | T +32 10 47 58 11 | F +32 10 47 58 10 info@iba-group.com | iba-worldwide.com

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B) Equivalent financial instruments	After the transaction
Holders of equivalent financial instruments	Type of financial instrument	Expiration date	Exercise period or date	# of voting rights that may be acquired if the instrument is exercised	% of voting rights	Settlement
TOTAL				0	0.00%
B The totals will be updated once you have clicked on
	TOTAL (A & B)			# of voting rights	% of voting rights
			CALCULATE	563,694	1.39%

• Full chain of controlled undertakings through which the holding is effectively held

Vallcara Limited is 100% owned by Vallgesa Limited (C 58154), a company registered in Malta.

• Additional information

Vallcara Limited is receiving the shares from its sister company Solvanova Limited, as the latter is due to be liquidated in 2024. Vallcara Ltd. can exercise all the voting rights received from Solvanova Limited

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 2.000 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

For further information, please contact:

Valérie Van Impe Paralegal +32479267809 legal@iba-group.com

Press release | 09//01/ 2024