Bagging of order pursuant to Regulation 30 of SEBI LODR 2015

www.stl.tech August 01, 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 Subject: Disclosure under Regulation 30 of Securities and Exchange Board of India (Listing Obligations and Disclosure Requirements) Regulations, 2015 (‘SEBI Listing Regulations’), as amended from time to time Dear Sir/Madam, Pursuant to Regulation 30 read Schedule III of the SEBI Listing Regulations, we hereby wish to inform you that Sterlite Technologies Limited (the Company’ or ‘STL’) has received an order from Domestic Telecom Operator. The details as required under SEBI Listing Regulations and SEBI Master Circular No. HO/49/14/14(7)2025- CFDPOD2 / I / 3762 / 2026 dated January 30, 2026 are enclosed in Annexure A. We request you to take the same on record. Thank you. Yours faithfully, For Sterlite Technologies Limited Mrunal Asawadekar Company Secretary & Compliance Officer Membership No.: ACS 24346 Sterlite Technologies Limited R egistered office: 4th Floor, Godrej Millennium, Koregaon Road 9, STS 12/1, Pune, Maharashtra- 411 001, India. CIN - L31300PN2000PLC202408 www.stl.tech Annexure A Sr. No. Particulars Description 1. name of the entity awarding the Domestic Telecom Operator order(s)/contract(s) 2. significant terms and conditions of Multi-year Supply Agreement (period of 2 years order(s)/contract(s) awarded in brief and extendable by another 2 years on mutual agreement) 3. whether order(s) / contract(s) have been Domestic entity awarded by domestic/ international entity 4. nature of order(s) / contract(s) Supply of optical fibre cables as per customer specifications 5. whether domestic or international Domestic 6. time period by which the order(s)/contract(s) is FY28 and FY29 (further extendable by another to be executed 2 years on mutual agreement) 7. broad consideration or size of the approx. INR 960 cr. order(s)/contract(s) 8. whether the promoter/ promoter group / group NA companies have any interest in the entity that awarded the order(s)/contract(s)? If yes, nature of interest and details thereof 9. whether the order(s)/contract(s) would fall NA within related party transactions? If yes, whether the same is done at “arm’s length” Sterlite Technologies Limited R egistered office: 4th Floor, Godrej Millennium, Koregaon Road 9, STS 12/1, Pune, Maharashtra- 411 001, India. CIN - L31300PN2000PLC202408