Analysts/Institutional Investor Meet/Con. Call Updates

OIL AND NATURAL GAS CORPORATION LIMITED COMPANY SECRETARIAT ONGC/CS/SE/2026-27 10.11.2026 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 Meeting Slots November 16, 2026 JM Financial Annual India Group Meetings & One Mumbai 11 AM – 3 PM Conference - India Xchange 2026 on One Meetings November 17, 2026 29th CITIC CLSA India Forum Group Meetings & One Mumbai 10 AM – 6 PM on One Meetings *Note: Dates are subject to changes. Changes may happen due to exigencies on the part of investors/company. Please note that no Unpublished Price Sensitive Information is proposed to be shared by the Company during the aforesaid Investor Conference. 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