Analysts/Institutional Investor Meet/Con. Call Updates

OIL AND NATURAL GAS CORPORATION LIMITED COMPANY SECRETARIAT ONGC/CS/SE/2026-27 12.08.2026 National Stock Exchange of India Ltd. BSE Limited Listing Department Corporate Relationship Department Exchange Plaza Phiroze Jeejeebhoy Towers Bandra-Kurla Complex, Bandra (E) Dalal Street, Fort Mumbai – 400051 Mumbai – 400001 Symbol-ONGC; Series – EQ BSE Security Code Equity: 500312 NCD: 959881 Sub: Conference call with Analyst(s) & Investor(s): Outcome (Transcript) Madam/ Sir, This has reference to our communication dated 01.08.2026 and 05.08.2026 on the subject noted above. In terms of Regulation 30 of the SEBI (Listing Obligations and Disclosure Requirements) Regulations, 2015, it is informed that transcript of the subject call has been uploaded at the website of the Company and may be accessed at https://ongcindia.com/web/eng/transcription This is for your reference and record. 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 EPABX: 2675 0111, 2629000 CIN: L74899DL1993GOI054155 Website: www.ongcindia.com Email: secretariat@ongc.co.in