Bagging of order pursuant to Regulation 30 of SEBI LODR

www.stl.tech August 29, 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’) 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 signed a long term contract with a Leading hyperscaler. 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 Leading hyperscaler order(s)/contract(s) 2. significant terms and conditions of order(s)/ i) Allocation of high density optical fibre cable contract(s) awarded in brief products to be supplied as per customer specification in each Calendar Year (CY) starting from 2027 to 2029 ii) Purchase orders will be released periodically during the contract period iii) The agreement establishes a reciprocal risk- sharing framework by defining mutual, capped financial liabilities for both parties in the event of demand shortfalls or supply capacity shortages 3. whether order(s)/ contract(s) have been International entity awarded by domestic/ international entity 4. nature of order(s)/ contract(s) Long Term Supply Agreement 5. whether domestic or international International 6. time period by which the order(s)/ contract(s) Three calendar years; CY27 to CY29, which is to be executed can be extended by further two years with mutual consent of the parties 7. broad consideration or size of the order(s)/ Approximately USD 288 Million 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