Press Release

CS:01:100/26-27 23.07.2026 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: Intimation under Regulation 30 of SEBI (Listing Obligations & Disclosure Requirements) Regulations, 2015 - Press Release - - - - - Please find attached copy of the press release made by the Company in respect of ‘CPCL Financial Performance for the quarter ended 30.06.2026’. 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 CPCL’S FINANCIAL PERFORMANCE FOR THE QUARTER ENDED 30.06.2026 SUSTAINED OPERATIONAL EXCELLENCE CPCL delivered outstanding operational results during Q1 FY2026–27, achieving a crude throughput of 2.85 million metric tonnes (MMT), compared to 2.98 MMT in the corresponding quarter of the previous financial year. This translates to a capacity utilisation of 108%, underscoring efficient plant operations and high reliability and recorded Highest ever distillate yield FINANCIAL PERFORMANCE The Company’s financial results for the quarter reflected the robust physical performance and improved refining margins. For the quarter ended June 30, 2026, Revenue from Operations stood at ₹ 29,359 crore, compared to ₹ 18,683 Cr in the corresponding period of last year. The Company reported a Profit Before Tax (PBT) of ₹ 1366 crore and a Profit After Tax (PAT) of ₹1017 Cr, as against a Loss Before Tax of ₹ 80 crore and Loss After Tax of ₹ 57 Cr during the same quarter of last year. Pursuant to the retrospective revision in the prices w.e.f 16th March 2026 of certain petroleum products, an additional revenue of ₹385.21 crore relating to supplies made during March 2026 has been recognised during the current quarter. The same has been excluded in the Gross Refining Margin (GRM) reported. Accordingly, average GRM for the period April–June 2026 is US$ 8.78 per barrel as against a US$ 3.22 per barrel in the same period last year. On a consolidated basis, for the Quarter ended June 30, 2026, CPCL recorded a Profit Before Tax of ₹ 1380 Cr and Profit After Tax of ₹ 1031 crore. *****