Chennai Petroleum Corporation Ltdhas informed BSE that the meeting of the Board of Directors of the Company is scheduled on 22/10/2026 ,inter alia, to consider and approve Update on board meeting - Declaration of Interim Dividend, if any, for the FY 2026-27

CS:01:100/26-27 15th October, 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: Board Meeting – Declaration of Interim Dividend, if any, for the FY 2026-27. ---- Further to our earlier communication vide letter no. CS: 01:100/26-27 dated 09.10.2026 (Annexure - I) and Pursuant to Regulation 29(1) & (2) and 50(1) of SEBI (Listing Obligations and Disclosure Requirements) Regulations, 2015, it is hereby informed that, the Board in the aforesaid meeting dt. 22.10.2026 (Thursday) may consider declaration of interim dividend, if any for the financial year 2026-27. The above is for your information and record please. Thanking you, Yours faithfully, for Chennai Petroleum Corporation Limited Lalit Kumar Mohanty Company Secretary CS:01:100/26-27 09th October, 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: Board Meeting – Audited Financial Results for the Quarter and Half Year Ended 30th September 2026. ---------- Pursuant to regulation 29(1) & (2) and 50(1) of the SEBI (Listing Obligations & Disclosure Requirements), Regulations 2015, it is hereby informed that a Board Meeting of the Company is scheduled on Thursday, 22nd October 2026, inter alia, to consider and approve the Audited Standalone and Consolidated Financial Results of the Company for the Quarter and Half Year ended 30th September 2026. Further to our earlier letter dated 24th September 2026 with regard to closure of Trading Window, it is hereby informed that the Trading Window for dealing in securities of Chennai Petroleum Corporation Ltd. shall remain closed till 24th October 2026 for all ‘Insiders’ as per the Insider Trading Code of the Company. The above is for your information and record please. Thanking you, Yours faithfully, for Chennai Petroleum Corporation Limited Lalit Kumar Mohanty Company Secretary