Oxurion NV — Major Shareholding Notification 2025

Jun 12, 2025

Oxurion Receives Amended Transparency Notification from Atlas Special Opportunities II LLC

Leuven, BELGIUM – June 12, 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 a transparency notification as follows:

Oxurion received a transparency notification on June 11, 2025, from Atlas Special Opportunities II, LLC indicating that as of June 3, 2025, it held 2,340,268 shares of the then outstanding 8,496,303 shares, and therefore crossed above the threshold (25%) by virtue of the purchase of voting securities.

Oxurion received a transparency notification on June 9, 2025, from Atlas Special Opportunities II, LLC indicating that as of June 6, 2025, it held 2,061,174 shares of the then outstanding 8,496,303 shares, and therefore crossed under the threshold (25%) by virtue of the selling of voting securities.

This press release replaces the press release published on June 11, 2025

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 MARKETS AUTHORITY	FINANCIAL SERVICES AND	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 bv
	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 It art. 7 of the Law applies)
	Name	Address (for legal entitles)
	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
		03/06/2025 (DD/MM/YYYY)
8) Threshold that is crossed (in %)
		25
		If the holding has fallen below the lowest threshold, you have the option of not entering any numbers in Section 10
9) Denominator
	8,496,303
	Please enter the denominator before filling in the data
10) Notified details
A) Voting rights	Previous notification	After the transaction

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
Atlas Special Opportunities II LLC	244,798	2,340,268		27.33%
	TOTAL	2,340,268	0	27.54%	0.00%

B) Equivalent financial Instruments	After the transaction
Holders of equivalent financial instruments	Type of financial Instrument	Expiration diate	Exercise period or dete	# of voting rights that may be acquired if the Instrument Is exercised	% of voting rights	Settlement
							+
TOTAL			0	0.00%
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The torals will be updated once you have clicked on «CAI D

TOTAL (A & B)
	CALCULATE	2,340,268	27.54%

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

12) In case of proxy voting for only one GM

Holder	will cease to hold / will hold again	voting rights as of	ULUMM LOLO

13) Additional information

On 28 May 2025 (wh satement date n 3 May 2025), Atas Special Child Strict Micro Ni, as arealt of the listendra de announce negation one en 2005 and Personaler (-1995).
State

	Done at New York
Оп		10/06/2025 (DD/MM/YYYYY)
	Name & capacity Patrick Vance, Proxyholder

Signature Potrick Vaule

For security reasons, the unsigned form in xlsx format should
be transmitted to trp.fin@tsms.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
	Name OXURION
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, Sulte 401, Purchase, NY 10577
	6) Persons that dispose of votinq rights (only to be filled in if art. 7 of the Law applies)
	Name	Address (for legal entitles)
	Please continue entering the information in part il concerning the persons referred to In Sections 5 and 6	Part II
7) Date on which the threshold is crossed
		06/06/2025 (DD/MM/YYYY)
8) Threshold that is crossed (in %)
		25
		If the holding has fallen below the lowest threehold, you have the option of not entering any numbers in Section 10
9) Denominator
	8,496,303
	Please enter the denominator before filling in the data
10) Notified details
A) Voting rights	Previous notification	After the transaction

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
Atlas Special Opportunities II LLC	2,340,268	2,061,174
	TOTAL	2,061,174	0	24.26%	0.00%

B) Equivalent financial instruments After the transaction
Holders of equivalent financial Instruments	Type of financial Instrument	Expiration diate	Exercise period or date	# of voting rights that may be acquired if the Instrument is exercised	% of voting rights	Settlement
							+
	TOTAL			0	0.00%
C The zotals will be updated once you have clicked on «CALCULATE>

TOTAL (A & B)			# of voting rights % of voting rights
	CALCULATE	2,061,174	24.26%

11) Full chain of controlled undertakinos through which the holding is effectively held, if applicable

12) In case of proxy voting for only one GM

Holder	will cease to hold / will hold aqain	voting rights as of

13) Additional information

On Aleria Collection (alsociation in Color All Collect Comments (a a neut ministra mandag essed bat 73 a ner 1 34,58
Promoco in colorido e n Lue 2012 contril Colorad 24,23

For security reasons, the unsigned form in xlsx form in xlsx format should
be transmitted to trp.fin@fsma.be. You can do this manually
OR if you have MS Outlook at your di Send" button.

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