Information on telephone number changes

ADDITIONAL INFORMATION REGARDING A CHANGE IN PHONE NUMBER

Gloster Digital Group Public Limited Company ( Company Registration Number: 01-10-143270; Registered Office: 1038 Budapest, Fürdő u. 2.; hereinafter: the Company) hereby provides the following information in accordance with applicable laws and regulations, in particular Act CXX of 2001 on the Capital Market (“Tpt.”), Decree 24/2008. (VIII. 15.) PM on the detailed rules of disclosure obligations regarding publicly traded securities, as well as the General Rules of the Budapest Stock Exchange, hereby informs the Esteemed Investors of the following.

The Company’s telephone contact information will change as follows:

The new main phone number: +36 1-453-4110

We kindly ask our esteemed investors and partners to use the contact number provided above for all future telephone inquiries. The previous number will remain in service during a transitional period. The Company’s other telephone contact numbers remain unchanged.

Budapest, 26 September 2025.

GlosterDigital Group Plc.

Further information:

Dr. Adrienn Karlovich-Szabó

Investor Relations

karlovich.szabo.adrienn@gloster.hu

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