General Updates

18th September 2026 BSE Limited, 25th Floor, Phiroze Jeejeebhoy Towers Dalal Street, Fort Mumbai 400 001 Stock Code: 513375 National Stock Exchange of India Ltd. Exchange Plaza, 5th Floor Plot No. C/1, G Block Bandra-Kurla Complex, Bandra (E) Stock Code: CARBORUNIV Mumbai 400 051 Dear Sir/Madam, Sub: Disclosure under Regulation 30 of SEBI (Listing Obligations and Disclosure Requirements) Regulations, 2015 (‘Listing Regulations’) - Environment, Social and Governance (‘ESG’) rating by Niche Ninety Nine Capability and Certifications (OPC) Private Limited We wish to inform you that Niche Ninety Nine Capability and Certifications (OPC) Private Limited, a SEBI-registered ESG Rating Provider, has assigned an ESG rating to the Company. The said report has been published on the websites of Exchanges at the following links: BSE: https://www.bseindia.com/stock-share-price/carborundum-universal- ltd/carboruniv/513375/intermediaries-ERP/ NSE: https://www.nseindia.com/companies-listing/corporate-sdd-credit-rating-esg. Please note that the Company has not engaged Niche Ninety Nine Capability and Certifications (OPC) Private Limited. The ESG report is independently prepared by them based on information available in the public domain. Further, the aforesaid rating was submitted to BSE Limited and National Stock Exchange of India Limited by Niche Ninety Nine Capability and Certifications (OPC) Private Limited. We have received communication on the upload by BSE limited on 17th September 2026 at 06:49 p.m. Kindly take the above information on record. Thanking you Yours faithfully, For Carborundum Universal Limited Rekha Surendhiran Company Secretary