Intimation for upgrade in Credit Rating outlook.

www.stl.tech September 2, 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 - 400 001. Mumbai - 400 051. Scrip ID – STLTECH S crip Code – 532374 Sub: Intimation regarding upgrade in Credit Rating Dear Sir/ Madam, Pursuant to Regulation 30 of the SEBI (Listing Obligations and Disclosure Requirements) Regulations, 2015, we wish to inform you that Crisil has upgraded our rating from AA- to AA for Long term instruments and reaffirmed the ratings for Short-term instruments for the Company: Instrument Amount (Rs. crore) Rating action Rs.3564 Crisil AA/Stable, (Upgraded from Bank Loan Facilities (Reduced from Rs.4045 Crore) 'Crisil AA-/Stable') Crisil AA/Stable, (Upgraded from Non-Convertible Debentures 200.00 'Crisil AA-/Stable') Crisil AA/Stable, (Upgraded from Non-Convertible Debentures 90.00 'Crisil AA-/Stable') Crisil AA/Stable, (Upgraded from Non-Convertible Debentures 100.00 'Crisil AA-/Stable') Commercial Paper 100.00 Crisil A1+, (Reaffirmed) Commercial Paper 700.00 Withdrawn The ratings rationale can be accessed at below link: https://www.crisilratings.com/mnt/winshare/Ratings/RatingList/RatingDocs/SterliteTechnologiesLimited_Se ptember%2001_%202026_RR_404836.html Kindly take the above on record. Thanking you. Yours faithfully, For Sterlite Technologies Limited Ankit Agarwal Managing Director DIN: 03344202 Sterlite Technologies Limited Regist ered office: 4th Floor, Godrej Millennium, Koregaon Road 9, STS 12/1, Pune, Maharashtra- 411 001, India. CIN - L31300PN2000PLC202408