Certificate under SEBI (Depositories and Participants) Regulations, 2018

www.stl.tech October 8, 2026 National Stock Exchange of India Limited BSE Limited Exchange Plaza, 5th Floor, Phiroze Jeejeebhoy Towers, Plot No. C-1, G Block, Dalal Street, Bandra Kurla Complex, Bandra (East) Mumbai – 400001 Mumbai – 4000517 Scrip ID - STLTECH Scrip Code - 532374 Sub: Certificate under Regulation 74(5) of Securities and Exchange Board of India (Depositories and Participants) Regulations, 2018 for the quarter ended September 30, 2026 Dear Sir/Madam, Pursuant to Regulation 74(5) of the SEBI (Depositories and Participants) Regulations, 2018, we are enclosing herewith a copy of the certificate received from KFin Technologies Limited, the Registrar and Transfer Agent of the Company, for the quarter ended September 30, 2026. This is for your information and records. Yours faithfully, For Sterlite Technologies Limited Mrunal Asawadekar Company Secretary & Compliance Officer Membership No.: ACS 24346 Enclosure: As above. Sterlite Technologies Limited Regist ered office: 4th Floor, Godrej Millennium, Koregaon Road 9, STS 12/1, Pune, Maharashtra- 411001, India. CIN - L31300PN2000PLC202408 KFPL/SOTL/CDSL/74(5)/ 2026-27/Q2 Oct 08, 2026 THE COMPANY SECRETARY M/S. STERLITE TECHNOLOGIES LTD. 4TH FLOOR, GODREJ MILLENNIUM 9, KOREGAON ROAD PUNE 411 001 Dear Sir(s), Sub: Confirmation under Regulation 74(5) for the quarter ended 30th September,2026. Pursuant to Regulation 74(5) of Securities and Exchange Board of India (Depositories and Participants) Regulations, 2018, we hereby confirm that the securities received from the depository participants for dematerialization during the quarter ended 30th September,2026, were confirmed (accepted / rejected) to the depositories by us and the securities comprised in the said certificates have been listed on stock exchanges where the earlier issued securities are listed. We also hereby confirm that the security certificates received for dematerialisation have been mutilated and cancelled after due verification by the depository participant and the name of the depositories have been substituted in register of members as the registered owner within 15 days. Request to kindly take the above on record. Thanking you, Yours faithfully, For KFin Technologies Limited C Shobha Anand Vice President