General Updates

HQ/CS/CL.24B/18509 September 15, 2026 National Stock Exchange of India Limited BSE Limited Exchange Plaza, Bandra Kurla Complex, P.J. Towers, Dalal Street, Mumbai – 400 051 Mumbai – 400 001 SYMBOL: TATACOMM Scrip Code: 500483 Dear Sir / Madam, Sub: Intimation under Regulation 30 of SEBI (Listing Obligations and Disclosure Requirements) Regulations, 2015 – Update on material litigation This is with reference to our letter dated August 14, 2023, subsequent updates submitted as part of the Quarterly Integrated Filing (Governance), and our letter dated June 28, 2025, regarding the ongoing material litigation involving Tata Communications (Canada) Ltd. (‘TC Canada’), a subsidiary of the Company, in relation to tax claims raised by the Canada Revenue Agency (‘CRA’). As an update to the matter, the Company wishes to inform that TC Canada and the CRA have reached an agreement in principle to settle the issue pertaining to claims for taxes on income on account of the International Telecommunications Services business of TC Canada. The Company had on June 28, 2025 already intimated the stock exchanges about an in-principle agreement for settling the claims pertaining to the Signaling business of TC Canada. There is no material impact currently expected on the financials of the Company pursuant to this in principle agreement for settlement. The aforesaid documents are also placed on the website of the Company at www.tatacommunications.com/investors. Kindly take the same on your records. Thanking you, Yours faithfully, For Tata Communications Limited Zubin Adil Patel Company Secretary and Compliance Officer Tata Communications Limited Plot No. C21 & C 36 ‘G’ Block Bandra Kurla Complex Bandra (East) Mumbai 400098 India Regd. Office: VSB Mahatma Gandhi Road Fort Mumbai – 400 001 Tel: 91 92289 18171 email: investor.relations@tatacommunications.com CIN: L64200MH1986PLC039266 website: www.tatacommunications.com Attachment A Details required under Regulation 30 of the 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. No. Items of Disclosure Description 1. The details of any change in the Following audits, CRA had raised certain claims for status and/or any development in taxes on income from TC Canada’s international relation to such proceedings telecommunications services and support services for Signaling business rendered by TC Canada. By way of update vide our letter dated June 28, 2025, the Company had informed that TC Canada and CRA had reached an agreement in principle to settle the issue pertaining to the determination of the taxable income of the Signaling business of TC Canada. Per the latest development, TC Canada and CRA have reached an agreement in principle on September 14, 2026 to settle the issue pertaining to international telecommunications services rendered by TC Canada. 2. In the case of litigation against key Not Applicable. management personnel or its promoter or ultimate person in control, regularly provide details of any change in the status and / or any development in relation to such proceedings 3. In the event of settlement of the TC Canada and the CRA have reached an proceedings, details of such agreement to settle the aforesaid matters. The settlement including - terms of the terms of settlement are currently under finalization settlement, compensation/ penalty and the Company will make necessary disclosures paid (if any) and impact of such and provide appropriate updates upon execution of settlement on the financial position the settlement documents between the parties. of the listed entity Currently, the parties do not have a definitive timeline for completion of the aforementioned document. Tata Communications Limited Plot No. C21 & C 36 ‘G’ Block Bandra Kurla Complex Bandra (East) Mumbai 400098 India Regd. Office: VSB Mahatma Gandhi Road Fort Mumbai – 400 001 Tel: 91 92289 18171 email: investor.relations@tatacommunications.com CIN: L64200MH1986PLC039266 website: www.tatacommunications.com