Credit Rating- Revision

OIL AND NATURAL GAS CORPORATION LIMITED COMPANY SECRETARIAT ONGC/CS/SE/2026-27 16.07.2026 National Stock Exchange of India Ltd. BSE Limited Listing Department Corporate Relationship Department Exchange Plaza Phiroze Jeejeebhoy Towers, Dalal Street, Bandra-Kurla Complex Fort Mumbai- 400001 Bandra (E), Mumbai – 400 051 BSE Security Code Equity: 500312 Symbol - ONGC; Series – EQ NCDs: 959881 Sub: Revision in Credit Rating Madam/Sir, Pursuant to Regulation 30 of the SEBI (Listing Obligations and Disclosure Requirements) Regulations, 2015, it is hereby informed that Fitch Ratings affirms Oil and Natural Gas Corporation Limited at ‘BBB-‘/Stable; raised Standalone Credit Profile (SCP) to ‘bbb+’. Details of Credit rating are enclosed for reference and records. Thanking You, Yours Sincerely, for Oil and Natural Gas Corporation Ltd. (Shashi Bhushan Singh) Company Secretary & Compliance Officer Regd. Office: Plot No 5A-5B, Nelson Mandela Marg, Vasant Kunj, New Delhi-110070 Phone: 011-2675 4073, 011-2675 4085, CIN: L74899DL1993GOI054155 Website: www.ongcindia.com Email: secretariat@ongc.co.in OIL AND NATURAL GAS CORPORATION LIMITED COMPANY SECRETARIAT Details of Credit Rating Instruments Rating Agency Rating Outlook International Bonds (Senior unsecured notes) issued Moody’s Foreign Currency Stable by company and subsidiaries which are guaranteed Investors Rating: Baa3 by the Company Service Local Currency Rating: Baa3 International Bonds (Senior unsecured notes) issued S&P Global Long Term Issue Stable by company and subsidiaries which are guaranteed Ratings Rating: BBB by the Company International Bonds (Senior unsecured notes) issued Fitch Ratings Long Term Stable by company and subsidiaries which are guaranteed Foreign Currency by the Company Issuer Default Rating: BBB- Commercial Paper up-to Rs. 10,000 Crore CARE Ratings CARE A1+ - outstanding at any point of time Limited Commercial Paper up to Rs. 10,000 Crore India Ratings and - outstanding at any point of time Research Private IND A1+ Limited Non-Convertible Debentures for Rs. 8,500 Crore ICRA Limited [ICRA] AAA Stable Non-Convertible Debentures for Rs. 1,000 Crore India Ratings and IND AAA Stable Research Private Limited Non-Convertible Debentures for Rs. 7,500 Crore CARE Ratings CARE AAA Stable Limited Regd. Office: Plot No 5A-5B, Nelson Mandela Marg, Vasant Kunj, New Delhi-110070 Phone: 011-2675 4073, 011-2675 4085, CIN: L74899DL1993GOI054155 Website: www.ongcindia.com Email: secretariat@ongc.co.in