IBA – TRANSPARENCY NOTIFICATION

21 Jan 2026 18:00 CET

Issuer

ION BEAM APPLICATIONS S.A.

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

Louvain-la-Neuve, Belgium, January 21, 2026 06:00 PM

Summary of the notification

IBA (Ion Beam Applications), the world leader in particle accelerator technology, 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 January 13, 2026.

In its notification, Vallgesa Limited indicated that following an acquisition or disposal of securities or voting rights, Vallcara Limited, a controlled undertaking of Vallgesa Limited, exceeded the 5% threshold on 28/11/2025.

Content of the notification

Reason for the notification: Acquisition or disposal of voting securities or voting rights
Notification by: 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 TP01, Malta
Vallgesa Limited	T6-F09 Tigne Point Sliema TP01, Malta

Date on which the threshold is crossed: 11-28-2025
Threshold crossed (in %) : 5%
Denominator : 40.514.619
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
Vallgesa Limited	0	0	0	0,00%	0,00%
Vallcara Limited 100% owned by Vallgesa Limited	1,621,565	2,040,541	0	5.04%	0,00%
Subtotal	1,621,565	2,040,541	0	5.04%	0,00%
TOTAL		2,040,541	0	5.04%	0,00%

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%

TOTAL (A & B)	# of voting rights	% of voting rights
	2,040,541	5.04%

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

Vallcara Limited is 100% held by Vallgesa Limited. Vallgesa Limited is not a controlled entity.

Additional information

Vallcara Limited has reached the 5% notification threshold due to acquisition of shares.

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 to be one of the most advanced forms of radiation therapy available today, 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:

Elena De Landy
Paralegal: Corporate Affairs and Insurance
legal@iba-group.com

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