Updates

CS:01:100/26-27 08.10.2026 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 Mumbai — 400 001 Bandra (e) Mumbai — 400 051 BSE Scrip Code: 500110 NSE Trading Symbol: CHENNPETRO ISIN: INE178A01016 Dear Sir, Sub: Disclosure of information under Regulation 30 of SEBI (LODR) Regulations 2015, Reply to clarification sought on spurt in volume of CPCL Shares - - - - - With reference to your email dated 8th October 2026 bearing Reference No.: L/SURV/ONL/PV/SG/ 2026-2027 / 424, seeking clarification for significant increase in the volume of the security across Exchanges, in the recent past, we would like to inform that the Company has duly informed the Stock Exchanges, from time to time, all events and information as required to be disclosed under Regulation 30 of the Securities and Exchange Board of India (Listing Obligations and Disclosure Requirements) Regulations, 2015. We further submit that to the best of our knowledge, there is no unpublished price sensitive information/event which needs to be disclosed to the Stock Exchanges at this point of time. The recent movement in the volume of shares of the Company is market driven. This is for your information and record please. Thanking you, Yours Faithfully, For Chennai Petroleum Corporation Limited, Lalit Kumar Mohanty Company Secretary