Certificate under SEBI (Depositories and Participants) Regulations, 2018

No. Secl/Listing 5th October 2026 National Stock Exchange of India Ltd. BSE Ltd. Exchange Plaza, 5th Floor, 25th Floor, Bandra –Kurla Complex, P J Tower, Bandra (E), Dalal Street, Mumbai – 400051 Mumbai – 400001 Scrip Symbol: IOC Scrip Code: 530965 Ref: Symbol: IOC; Security Code: 530965; ISIN: INE242A01010 Dear Sir, Sub : Compliance with Regulation 74(5) of the SEBI (Depositories & Participants) Regulations, 2018 We are enclosing herewith Certificate received from KFin Technologies Limited, a Registrar & Transfer Agents of Indian Oil Corporation Limited confirming compliance of provisions of Regulation 74(5) of SEBI (Depositories and Participants) Regulations, 2018 for the quarter ended 30th September 2026. This is for your information & record please. Thanking you, Yours faithfully, For Indian Oil Corporation Ltd. (Kamal Kumar Gwalani) Company Secretary Dated: 01-10-2026 Indian Oil Corporation Limited Indianoil Bhavan G 9 Ali Yavar Jung Marg Bandra (East) Mumbai 400 051 Dear Sir, Subject: Confirmation Certificate in the matter of Regulation 74 (5) of Securities and Exchange Board of India (depositories and Participants) Regulations, 2018 In reference to the above captioned regulation, we hereby confirm that the securities received from the depository participants for dematerialisation during the quarter ended 30th September, 2026, were confirmed (accepted/rejected) to the depositories by us and that securities comprised in the said certificates have been listed on the stock exchanges where the earlier issued securities are listed. We hereby also confirm that the security certificates received for dematerialisation have been confirmed/rejected and the security certificates received were mutilated and cancelled after due verification by the depository participant and the name of the depositories have been substituted in the register of members as the registered owner within 15 days. We request you to kindly take note of the above in your records. Thanking You, Your faithfully For KFin Technologies Ltd. Ganesh Chandra Patro Deputy Vice President– Corporate Registry (RIS)