Analysts/Institutional Investor Meet/Con. Call Updates

OIL AND NATURAL GAS CORPORATION LIMITED COMPANY SECRETARIAT ONGC/CS/SE/2026-27 14.08.2026 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: Schedule of Analyst/ Investor Meet Madam/Sir, Pursuant to Regulation 30 of the SEBI (Listing Obligations and Disclosure Requirements) Regulations, 2015, it is informed that the Schedule of Analyst or Institutional Investor Meeting with the Company is as under: Date Particulars Type of Meeting Location August 18, 2026 Motilal Oswal 22nd Annual Global Group Meetings Mumbai Investor Conference 2026 *Note: Date is subject to change. Change may happen due to exigencies on the part of Investors/Company. The meeting slots will be scheduled between 12:00 p.m. - 05:00 p.m. as per the conference timings. Please note that no Unpublished Price Sensitive Information is proposed to be shared by the Company during the aforesaid Investor Conference. There is delay in disclosure as the date and schedule of group meetings has been finalized today. This is for information and record, please. 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