Vastned Belgium NV

Major Shareholding Notification • Dec 12, 2025

Press release – Regulated information

Antwerp (BE), 12 December 2025 – 7:30 CET

Disclosure of transparency notification

(article 14, first paragraph, of the Law of 2 May 2007)

Notification by Westersingel I B.V. of 9 December 2025

Summary of the notification

Vastned NV has received on 9 December 2025 a transparency notification dated 9 December 2025, which indicates that Westersingel I B.V., as a result of the acquisition of shares on 4 December 2025, now holds more than 10% of the voting rights of Vastned NV. Westersingel I B.V. has thus crossed the 10% threshold (upward).

Content of the notification

The notification, dated 9 December 2025, contains the following information:

CATEGORIES OF NOTIFICATION	RESULTS OF THE RECEIVED FORM
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	• Joannes G.H.M. Niessen • Mont Cervin S.à r.l. (21, rue Philippe II, L-2340 Luxembourg, Luxembourg) • Westersingel I B.V. (Wilhelminakade 89, 3072 AP Rotterdam, the Netherlands)
Date on which the threshold is crossed	4 December 2025
Threshold that is crossed	10%
Denominator	19,469,032
Notified details	VOTING RIGHTS
	Joannes G.H.M. Niessen Previous notification: # of voting rights: 0 After the transaction: # of voting rights: 0 After the transaction: % of voting rights: 0
	Mont Cervin S.à r.l. Previous notification: # of voting rights: 0 After the transaction: # of voting rights: 0 After the transaction: % of voting rights: 0

Press release – Regulated information

Antwerp (BE), 12 December 2025 – 7:30 CET

	Westersingel I B.V. Previous notification: # of voting rights: 1,947,910 After the transaction: # of voting rights: 2,034,935 After the transaction: % of voting rights: 10.45%
	TOTAL After the transaction: # of voting rights: 2,034,935 After the transaction: % of voting rights: 10.45%
Full chain of controlled undertakings through which the holding is effectively held	J.G.H.M. Niessen owns 100% of Mont Cervin S.à r.l. and Mont Cervin S.à r.l. owns 100% of Westersingel I B.V.
Additional information	Due to a merger by absorption between Mont Cervin S.à r.l. and Nerisa Real Estate on 04/12/2025, Nerisa Real Estate is absorbed and no longer part of the chain.

For more information:

Vastned NV

investorrelations@vastned.be

Chief Executive Officer Sven Bosman +32 3 361 05 90

Chief Financial Officer Barbara Gheysen +32 3 361 05 90

About the Vastned group: The Vastned group comprises a Belgian public regulated real estate company (Euronext Brussels and Euronext Amsterdam: VASTB) and its (direct and indirect) subsidiaries in Belgium, the Netherlands, France and Spain. The Vastned group focuses on the best property in the popular shopping areas of selected European cities with a historic city centre where shopping, living, working and leisure meet. The Vastned group's property clusters have a strong tenant mix of international and national retailers, food & beverage entrepreneurs, residential tenants, and office tenants.