SPECIAL ANNOUNCEMENT REGARDING A CHANGE IN THE INVESTOR RELATIONS CONTACT

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, 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 regarding publicly traded securities, and the General Rules of the Budapest Stock Exchange, the Company hereby informs its esteemed investors of the following.

Effective June 22, 2026, Katalin Lódi, the Company’s Director of Marketing and Communications, will assume the role of investor relations officer. In light of the above, please direct any inquiries regarding the Company to the following contact information:

Name and Title of Investor Relations Contact:                                                    

                                                                                     Katalin Lódi

                                                                                     Director of Marketing and Communications

Investor Relations Contact Information:                                      

                                                        Mailing address: 1038 Budapest, Fürdő u. 2.

                                                        Email: ir@glosterdigital.com

                                                        Phone: + 36 1 453 4110                                

Budapest, June 18, 2026

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