Certificate under SEBI (Depositories and Participants) Regulations, 2018

CS:01:100/26-27 03rd July 2026 The Secretary National Stock Exchange of India Limited BSE Ltd. Exchange Plaza, 5th Floor Phiroze Jeejeeboy Towers Plot No.C/1, G-Block 25th Floor, Dalal Street Bandra Kurla Complex, Bandra (E) Mumbai – 400 001 Mumbai – 400 051 BSE Scrip Code: 500110 NSE Trading Symbol: CHENNPETRO ISIN: INE178A01016 Dear Sir, SUB: COMPLIANCE WITH REGULATION 74(5) OF SEBI (DEPOSITORIES & PARTICIPANTS) REGULATIONS, 2018 - - - - - We are enclosing herewith Certificate received from KFin Technologies Limited, the Registrar & Transfer Agents of Chennai Petroleum Corporation Limited (CPCL) confirming Compliance of provisions of Regulation 74(5) of SEBI (Depositories and Participants) Regulations, 2018 for the Quarter ended 30th June 2026. This is for your information and record please. Thanking you, Yours faithfully, for Chennai Petroleum Corporation Limited Lalit Kumar Mohanty Company Secretary Encl: a/a KFIN/CPCL/CDSL/74(5) E/1 Date: 02‐07‐2026 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 CHENNAI PETROLEUM CORPORATION 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 V BALAKRISHNAN (RIS) VICE PRESIDENT CC TO: CHENNAI PETROLEUM CORPORATION LIMITED ANNA SALAI TEYNAMPET CHENNAI 600018 KFIN/CPCL/NSDL/74(5) E/1 Date: 02‐07‐2026 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 CHENNAI PETROLEUM CORPORATION 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 V BALAKRISHNAN (RIS) VICE PRESIDENT CC TO: CHENNAI PETROLEUM CORPORATION LIMITED ANNA SALAI TEYNAMPET CHENNAI 600018