Certificate under SEBI (Depositories and Participants) Regulations, 2018

15th July 2026 BSE Limited 25th Floor, Phiroze Jeejeebhoy Towers Dalal Street, Stock Code: 513375 Mumbai 400 001 The Manager Listing Department 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: Certificate under Regulation 74(5) of SEBI (Depositories and Participants) Regulations, 2018 for the quarter ended 30th June 2026 Please find enclosed herewith the Certificates received from M/s. KFin Technologies Limited, the Registrar and Share Transfer Agent of the Company, for the quarter ended 30th June 2026. This report is submitted in compliance with Regulation 74(5) of the SEBI (Depositories and Participants) Regulations, 2018. We request you to kindly take the same on record. Thanking you Yours faithfully, For Carborundum Universal Limited Rekha Surendhiran Company Secretary Encl: as above KFIN/CULN/CDSL/74(5) E/1 Date: 01‐07‐2026 CENTRAL DEPOSITORY SERVICES (INDIA) LIMITED REGD OFF: MARATHON FUTUREX, A WING 25TH FLOOR NM JOSHI MARG LOWER PAREL (EAST) MUMBAI ‐ 400 023 Dear Sir(s), Sub: Certificate under Regulation 74(5) for the quarter ended June 30,2026 We as Registrar to an Issue and Share Transfer Agent of the CARBORUNDUM UNIVERSAL LIMITED, certify that the details of securities dematerialized/rematerialized during the aforesaid period, as required under Regulation 74(5) of SEBI (Depositories and participants) Regulations 2018 have been furnished to all the Stock Exchanges where the shares of the company are listed. Thanking You Yours faithfully, for KFIN TECHNOLOGIES LIMITED S R RAMESH DEPUTY VICE PRESIDENT CC TO: CARBORUNDUM UNIVERSAL LIMITED DARE HOUSE, NO.234 N.S.C. BOSE ROAD, PARRYS, CHENNAI 600001 KFIN/CULN/NSDL/74(5) E/1 Date: 01‐07‐2026 NATIONAL SECURITIES DEPOSITORY LIMITED TRADE WORLD 4TH FLOOR KAMALA MILLS COMPOUND SENAPATI BAPAT MARG LOWER PAREL MUMBAI ‐ 400 013 Dear Sir(s), Sub: Certificate under Regulation 74(5) for the quarter ended June 30,2026 We as Registrar to an Issue and Share Transfer Agent of the CARBORUNDUM UNIVERSAL LIMITED, certify that the details of securities dematerialized/rematerialized during the aforesaid period, as required under Regulation 74(5) of SEBI (Depositories and participants) Regulations 2018 have been furnished to all the Stock Exchanges where the shares of the company are listed. Thanking You Yours faithfully, for KFIN TECHNOLOGIES LIMITED S R RAMESH DEPUTY VICE PRESIDENT CC TO: CARBORUNDUM UNIVERSAL LIMITED DARE HOUSE, NO.234 N.S.C. BOSE ROAD, PARRYS, CHENNAI 600001