Notification of change of telephone number

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 No. 24/2008. (VIII. 15.) PM on the detailed rules governing disclosure obligations relating to 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 phone number will change as follows:

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

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

Budapest, September 26, 2025

GlosterDigital Group, Inc.

Further information:

Dr. Adrienn Karlovich-Szabó

Investor Relations

karlovich.szabo.adrienn@gloster.hu

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