Orange Belgium S.A.

Major Shareholding Notification • Oct 6, 2025

Transparency Declaration

Orange Belgium hereby discloses information in accordance with Article 14 of the Law of 2 May 2007 and the related Royal Decree of 14 February 2008:

On 6 October 2025, Orange Belgium received a joint transparency declaration from Nethys SA, Atlas Services Belgium SA and their controlling shareholders stating that, as of 6 October 2025, Nethys SA holds 2,986,979 shares, representing 4.43% of the total voting rights of the Company, while Atlas Services Belgium SA holds 51,427,221 shares, representing 76.29% of the total voting rights of the Company. Prior to the date referred to above, Nethys and Atlas Services Belgium held respective stakes of 11.08% and 69.94%. Nethys SA and Atlas Services Belgium SA are deemed to act in concert on the basis of a shareholders' agreement dated 2 May 2024.

The disclosure obligation is due to (i) the total holdings of Nethys SA in voting rights (section 10 A of the transparency declaration), falling under 5%, and (ii) the total holdings of Atlas Services Belgium in voting rights (section 10 A of the transparency declaration) going above 75%.

An increase above (or decrease below) the following thresholds requires a declaration to Orange Belgium and the Financial Services and Markets Authority (FSMA):

• 1. 3 % statutory threshold, as set out by the articles of association of the Company;
• 1. 5 % or each multiple of 5 %, as set out by the Belgian law.

The decrease in Nethys' shareholding in combination with the increase of Atlas Services Belgium's shareholding is a result of the partial execution of a put option foreseen in the shareholders' agreement referred to above whereby Atlas Services Belgium had committed to buying all or part of Nethys shares in Orange Belgium at a predetermined price. Nethys has the possibility to exercise this put option during certain windows in the three-year period that started on 2 June 2023.

The complete text of this transparency declaration is also available on the « Shareholders & Investors » section of our website https://corporate.orange.be/en/financial-information.

About Orange Belgium

Orange Belgium is one of the major telecommunication operators on the Belgian market, with revenues of 962.7 million euros, 3.5 million mobile customers and more than 1 million fixed broadband customers on 30 June 2025, and in Luxembourg, via its subsidiary Orange Communications Luxembourg. Thanks to its own fixed and mobile networks, Orange Belgium offers both residential and business customers fixed and mobile connectivity services and convergent offerings (internet, telephony, television, including original TV content: Be tv, VOOsport, etc.). As a responsible operator, Orange Belgium invests to reduce its ecological footprint and promote sustainable and inclusive digital practices. Orange Belgium is also a wholesale operator, offering its partners access to its infrastructure as well as a broad portfolio of connectivity and mobility services, including offerings based on Big Data and the Internet of Things (IoT).

Orange Belgium is a subsidiary of the Orange Group, present in 26 countries with a total customer base of 300 million customers worldwide on 30 June 2025. Orange is also a leading provider of global IT and telecommunication services to multinational companies under the brand Orange Business.

Orange Belgium is listed on the Brussels Stock Exchange (OBEL).

For more information, on the internet and on your mobile: corporate.orange.be, www.orange.be or follow us on X: @pressOrangeBe

Orange and any other Orange product or service names included in this material are trademarks of Orange or Orange Brand Services Limited.

Press contact

Sven Adams – sven.adams@orange.com +32 (0) 486 36 47 22 press@orange.be

Investors contact

Koen Van Mol - koen.vanmol@orange.com +32 (0) 495 55 14 99 ir@orange.be