Change in Key Managerial Personnel - Resignation of Company Secretary and Compliance Officer.

HQ/CS/CL.24B/18514 September 25, 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 Regulations – Change in Key Managerial Personnel – Resignation of Company Secretary and Compliance Officer Pursuant to Regulation 30 of the SEBI (Listing Obligations and Disclosure Requirements) Regulations, 2015 (‘SEBI Listing Regulations’), please be informed that Mr. Zubin Adil Patel has submitted his resignation from the position of Company Secretary and Compliance Officer of Tata Communications Limited, to be effective from the close of business hours on October 31, 2026. The Company has initiated steps to identify a successor and shall make necessary announcements in due course. Please find enclosed the following: a. Relevant details as prescribed under the SEBI Listing Regulations read along with the SEBI Master Circular No. SEBI/HO/49/14/14(7)2025-CFD-POD2/I/3762/2026 dated January 30, 2026, as amended, as Attachment A b. Copy of the resignation letter received from Mr. Zubin Adil Patel as Attachment B. Kindly take the same on your records. Thanking you, Yours faithfully, For Tata Communications Limited Ganapathi S. Lakshminarayanan Managing Director & Chief Executive Officer DIN: 01828104 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 SEBI Listing Regulations read with SEBI Master Circular No. SEBI/HO/49/14/14(7)2025-CFD-POD2/I/3762/2026 dated January 30, 2026 Reasons for Change Mr. Zubin Adil Patel has tendered his resignation as the Company Secretary and Compliance Officer of Tata Communications Limited. A copy of acknowledged resignation email containing reasons for resignation is enclosed as Attachment B. Date of cessation October 31, 2026 Brief Profile (in case of appointment) Not Applicable Disclosure of relationships between directors 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 September 25, 2026 The Board of Directors, Tata Communications Limited Subject: Resignation from the post of Company Secretary and Compliance Officer (Key Managerial Personnel) Dear Sirs, I hereby tender by resignation as the Company Secretary and Compliance Officer of Tata Communications Limited (Key Managerial Personnel) effective closing of business hours on October 31, 2026 to pursue opportunities outside Tata Communications. I am grateful to the Board, Senior Management and legal department for their support and co-operation during my tenure as the Company Secretary since March 2021. Thanking you, Yours faithfully, Zubin Adil Patel Membership Number: ACS 30277