Ion Beam Applications, SA

Major Shareholding Notification • Oct 20, 2020

IBA – TRANSPARENCY NOTIFICATION

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

Louvain-la-Neuve, Belgium, October 20, 2020, 17.45

Summary of the notification

IBA (Ion Beam Application), 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 October 20, 2020.

In its notification, Ion Beam Applications SA has notified, that following an introduction of additional notification thresholds in the articles of association, its total holding in IBA SA has crossed upwards the 1% threshold.

Content of the notification

• Reason for the notification: Introduction of additional notification thresholds in the articles of association
• Notification by : A parent undertaking or a controlling person
• Persons subject to the notification requirement: Ion Beam Applications SA, Chemin du Cyclotron 3, 1348 Louvain-la-Neuve IBA Investments SCRL, Chemin du Cyclotron 3, 1348 Louvain-la-Neuve
• Date on which the threshold is crossed: 10/03/2020
• Threshold crossed (in %): 1%
• Denominator: 37.760.676

Press release 20/10/2020

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
Ion Beam Applications SA	0	127.038	0	0.34%	0.00%
IBA Investments SCRL	0	410.852	0	1.09%	0.00%
Subtotal	0	537.890		1.42%
	TOTAL	537.890	0	1.42%	0,00%

• Notified details: (extract of the received notification form)

B) Equivalent financial instruments	After the transaction
Holder 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
		537.890	1.42%

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

IBA Investments SCRL is the subsidiary of Ion Beam Applications SA, wholly owned by the latter.

Press release 20/10/2020

• Additional Information

The introduction of new statutory thresholds on March 10, 2020 resulted in this threshold crossing of 1%.

For further information, please contact:

IBA

Elodie Jaumain Paralegal +32 10 203 180 legal@iba-group.com

About IBA

IBA (Ion Beam Applications) 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 also 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

Press release 20/10/2020