Oxurion NV — Major Shareholding Notification 2025

Jul 14, 2025

Oxurion Receives Transparency Notifications from Atlas Special Opportunities II LLC

Leuven, BELGIUM – July 14, 2025 – 06:00 PM CET - Oxurion NV (Euronext Brussels: OXUR), a biopharmaceutical company headquartered in Leuven, today announced that, pursuant to Belgian Transparency legislation¹ it has received transparency notifications as follows:

Oxurion received a transparency notification on July 9, 2025, from Atlas Special Opportunities II, LLC indicating that as of July 3, 2025, it held 3,931,718 shares of the then outstanding 12,428,021 shares, and therefore crossed above the threshold (30%) by virtue of the purchase of voting securities.

Oxurion received a transparency notification on July 9, 2025, from Atlas Special Opportunities II, LLC indicating that as of July 8, 2025, it held 3,524,934 shares of the then outstanding 12,428,021 shares, and therefore crossed under the threshold (30%) by virtue of the selling of voting securities.

About Oxurion

Oxurion NV (Euronext Brussels: OXUR) is a biopharmaceutical group in transition, combining therapeutic innovation with technologies applied to clinical research. Through its rapidly expanding technology division, Oxurion is building integrated expertise around clinical data, with the ambition to accelerate, secure, and transform the processes involved in developing new treatments. The Group's headquarters are based in Leuven, Belgium. More information is available at www.oxurion.com.

Important information about forward-looking statements

Certain statements in this press release may be considered "forward-looking". Such forward-looking statements are based on current expectations, and, accordingly, entail and are influenced by various risks and uncertainties. The Company therefore cannot provide any assurance that such forward-looking statements will materialize and does not assume any obligation to update or revise any forward-looking statement, whether as a result of new information, future events, or any other reason. Additional information concerning risks and uncertainties affecting the business and other factors that could cause actual results to differ materially from any forwardlooking statement is contained in the Company's Annual Report. This press release does not constitute an offer or invitation for the sale or purchase of securities or assets of Oxurion in any jurisdiction. No securities of Oxurion may be offered or sold within the United States without registration under the U.S. Securities Act of 1933, as amended, or in compliance with an exemption therefrom, and in accordance with any applicable U.S. state securities laws.

For further information please contact:

Oxurion NV Pascal Ghoson Chief Executive Officer Pascal.ghoson@oxurion.com

________

1. Article 14, first paragraph, of the Law of 2 May 2007 on disclosure of major holdings.

ANNEX 1

FSMA FINANCIAL SERVICES AND MARKETS AUTHORITY	Transparency notification Form TR-1 BE PART I
1) Status of the notification.
Final
2) Issuer
OXURION Name
Identification number 0881-620-924
3) Reason for the notification
Acquisition or disposal of voting securities or voting rights
4) Notification by
A person that notifies alone
5) Persons subject to the notification requirement
Name	Address (for legal entitles)
Atlas Special Opportunities II LLC	2500 Westchester Avenue, Suite 401, Purchase, NY 10577
6) Persons that dispose of voting rights (only to be filled in it art. 7 of the Law applies)
Name	Address (for legal entitles)
Please continue entering the information in part it concerning the persons referred to In Sections 5 and 6	Part II
7) Date on which the threshold is crossed
	03/07/2025 (DD/MM/YYYY)
8) Threshold that is crossed (In %)
	30
	If the holding has fallen below the lowest threehold, you have the option of not entering any numbers in Section 10
9) Denominator
	12,428,021
Please enter the denominator before filling in the data
10) Notified details

A) Voting rights	Previous notification	After the transaction
	# of voling 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
Atlas Special Opportunities II LLC	26,211	3,931,718
	TOTAL	3,931,718	0	31.64%	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%

The zorals will be updated once you have cilcked on «CALCULATE>

TOTAL (A & B)		# of voting rights % of voting rights
	CALCULATE	3,931,718	31.64%

11) Full chain of controlled undertakings through which the holding is effectively held, it applicable

Atlas Special Opportunities II LLC is not a controlled entity.
12) In case of proxy votinq for only one GM
will cease to hold / voting rights as of Holder will hold again	(DD/MM/YYYY)
13) Additional information
On 27 June 2025 (with settlement date on 0 July 2025), Mias Special Open N1, as a result of which Its starebrith decessed on 211 share ( 0.31%, denominator = 8,496,303). On 3 July 2025 (with editernent date on 3 July 2025), Allas Special 3,531,116 stares in Orudion NJ, as a result third its stareholding increased b 3,93,718 stares (- 31.64%, denominator = 12,428,021).

	Done at New York
On		08/07/2025 (DDIMMYYYY)
	Name & capacity Patrick Vance, Proxyholder		-Signed by: Patrick Varree Slanature

For security reasons, the unsigned form in xisx format should
be transmitted to trp.fin@ffsma.be. You can do this manually
OR if you have MS Outlook at your disposal via the

In addition, a signed copy in EDE format should also be
transmitted.

ANNEX 2

FSMA	FINANCIAL SERVICES AND MARKETS AUTHORITY		Transparency notification Form TR-1 BE PART I
1) Status of the notification
	Final
2) Issuer
Identification number 0881-620-924	Name OXURION
3) Reason for the notification
	Acquisition or disposal of voting securities or voting rights
4) Notification by
	A person that notifies alone
5) Persons subject to the notification requirement
	Name			Address (for legal entifies)
	Atlas Special Opportunities II LLC		2500 Westchester Avenue, Suite 401, Purchase, NY 10577
6) Persons that dispose of voting rights (only to be filled in if art. 7 of the Law applies)
	Name			Address (for legal entifies)
	Please continue entering the information in part if concerning the persons referred to In Sections 5 and 6			Part II
7) Date on which the threshold is crossed
			08/07/2025 (DD/MM/YYYY)
8) Threshold that is crossed (in %)
		30
	If the holding has fallen below the lowest threehold, you have the option of not entering any numbers in Section 10
9) Denominator
		12,428,021
	Please enter the denominator before filling in the data
10) Notified details
A) Voling rights	Previous notification			After the transaction
	# of voting rights			# of voting rights Not linked to the	% of voting rights Not linked to the

11 1 COLUM 11/01/20		Control Concession
		# 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
	Atlas Special Opportunities II LLC	3.931.718	3.524.934
		TOTAL	3,524,934	0	28.36%	0.00%

+

illy Start with "groupe" of holders. Add subtotals with the person or legal entity.
For groupe, start with the uitmate controling natural person or legal entity.
The

	TOTAL (A & B)		# of voting rights % of voting rights
The torals will be updated once you have cilicked on «CALCULATE> 48
TOTAL			0	0.00%
							+
Holders of equivalent financial instruments	Type of financial Instrument	Expiration diate	Exercise period or diste	# of voting rights that may be acquired if the Instrument Is exercised	% of voting rights	Settlement
B) Equivalent financial Instruments	After the transaction

11) Full chain of controlled undertakings through which the holding is effectively held, it applicable

3,524,934

CALCULATE

28.36%

12) In case of proxy voting for only one GM

13) Additional information

On 3.4% (area de 13.4%) - 120%, Mas Special Opodnities il LC aquira 3,0,778 areald drim it sanchdronim is aneridade prosesed a,30,17 latare (
1,83%, enning = 1,280,00)

For security reasons, the unsigned form in xlsx format should
be transmitted to trp.fin@tsma.be. You can do this manually
OR it you have MS Outlook at your disposal via th

In addition, a signed copy in EDE format should also be
transmitted.