Incorporation of a Wholly Owned Subsidiary in Hungary

Date: October 22, 2026. The Listing Department, BSE Limited Phiroze Jeejeebhoy Towers, Dalal Street, Mumbai - 400001. Sub: Disclosure under Regulation 30 of the SEBI (Listing Obligations and Disclosure Requirements) Regulations, 2015 (‘Listing Regulations’) – Incorporation of a Wholly Owned Subsidiary in Hungary. Dear Sir/Madam, In continuation of our letter dated August 13, 2026 on the outcome of the Board Meeting, wherein the Board of Directors of the Company approved the proposal for potential incorporation of a wholly owned subsidiary (“WOS”) of the Company in Hungary, we wish to inform you that the Company has incorporated a WOS in Hungary, namely AntWorks Europe Solutions Korlátolt Felelősségű Társaság (Abbreviated name: AntWorks Europe Solutions Kft.) (“AESK”). AESK has been registered by the Company Registry Court of the Metropolitan Court of Budapest (Fővárosi Törvényszék Cégbírósága) vide its registration order dated October 21, 2026, bearing Company Registration No. 01- 09-471458. Accordingly, AESK has become a wholly owned subsidiary of the Company with effect from October 21, 2026. The details as required under Regulation 30 of the Listing Regulations read with Para A of Part A of Schedule III thereto and SEBI Master Circular No. HO/49/14/14(7)2025-CFD-POD2/I/3762/2026 dated January 30, 2026, are enclosed herewith as Annexure A. This is for your information and records. Thanking You. Yours faithfully, For GTT Data Solutions Limited (Formerly known as Cinerad Communications Limited) Ebrahim Nimuchwala Company Secretary & Compliance Officer Membership No.: A60947 Page | 1 ANNEXURE A Details required under SEBI (Listing Obligations and Disclosure Requirements) Regulations, 2015 read with SEBI Master Circular No. HO/49/14/14(7)2025-CFD-POD2/I/3762/2026 dated January 30, 2026 Incorporation of Wholly Owned Subsidiary – AntWorks Europe Solutions Kft., Hungary Sr. Particulars Details 1. Name(s) of the entity, date & country of Name of the entity: AntWorks Europe Solutions Korlátolt incorporation, etc.; Felelősségű Társaság (Abbreviated name: AntWorks Europe Solutions Kft.) (“AESK”), a limited liability company. Date of Incorporation: October 21, 2026 (date of registration by the Company Registry Court of the Metropolitan Court of Budapest). Country of Incorporation: Hungary. Company Reg. No.: 01-09-471458; EUID: HUOCCSZ.01- 09-471458; Tax No.: 33146788-2-41; Community (EU VAT) Tax No.: HU33146788. Regd. Office: 1037 Budapest, Montevideo utca 8, Hungary. 2. Name of holding company of the AntWorks Europe Solutions Korlátolt Felelősségű incorporated company and relation with the Társaság is incorporated as a Wholly Owned Subsidiary listed entity; (WOS) of the GTT Data Solutions Limited. 3. Industry to which the entity being Business and other management consulting, Asset incorporated belongs; management, Computer programming, Information technology consultancy and operation of computer equipment and systems and Data Analytics, AI and other information technology service activities. 4. Brief background about the entity AESK is engaged in the business of management and other incorporated in terms of products / line of consulting services, asset management, computer business; programming, information technology consultancy, operation of computer equipment and systems, Data Analytics, AI and other information technology-related service activities. 5. Brief details of any governmental or Registration with the Company Registry Court of the regulatory approvals required for the Metropolitan Court of Budapest, obtained vide order dated incorporation; October 21, 2026. The investment will be made in accordance with the Foreign Exchange Management Act, 1999 and the rules and regulations thereunder, subject to applicable reporting requirements. 6. Nature of consideration - whether cash Cash. 100% subscription to the initial registered capital of consideration or share swap and details of AESK. the same; 7. Cost of subscription / price at which the HUF 3,000,000 (Hungarian Forint Three Million) being the shares are subscribed; entire initial registered capital of AESK, subscribed at face value. Page | 2 Sr. Particulars Details 8. Percentage of shareholding / control by the 100%. The Company is the sole member of AESK and listed entity and / or number of shares holds the entire registered capital of AESK. allotted. Page | 3