Bagging/Receiving of orders/contracts

www.stl.tech August 05, 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 Leading telecom infrastructure company. 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 telecom infrastructure company order(s)/contract(s) 2. significant terms and conditions of Supply agreement for high density optical fiber order(s)/contract(s) awarded in brief cable 3. whether order(s) / contract(s) have been International 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) is Three calendar years; CY27-29 to be executed 7. broad consideration or size of the Approximately USD 210 Million 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