Action(s) taken or orders passed

Hindustan Oil Exploration Company Limited ‘Lakshmi Chambers’, 192, St. Mary’s Road, Alwarpet, Chennai - 600 018. INDIA. Phone: 91 (044) 66229000 ● Fax: 91 (044) 66229011 / 66229012 E-mail: contact@hoec.com ● Website: www.hoec.com CIN: L11100GJ1996PLC029880 July 17, 2026 By Online The Listing Department The Corporate Relationship Department National Stock Exchange of India Ltd., BSE Limited “Exchange Plaza”, Bandra Kurla Complex, Bandra 1st Floor, P. Jeejeebhoy Towers, (East), Mumbai – 400 051 Dalal Street, Mumbai – 400 001 Stock Code: HINDOILEXP Stock Code: 500186 Dear Sir / Madam, Sub: Intimation under Regulation 30 of Securities and Exchange Board of India (Listing Obligations and Disclosure Requirements) Regulations, 2015 (“SEBI Listing Regulations”) Pursuant to the provisions of Regulation 30 read with Schedule III of SEBI Listing Regulations, we hereby disclose the details as required under Clause 20 of Para A of Part A of Schedule III of SEBI Listing Regulations relating to Hindustan Oil Exploration Company Limited (the “Company”). Particulars Information / Remarks State Tax Officer, (Legal & Adjudication), Chengalpattu Name of the authority(s); Intelligence Division, Chengalpattu. The Company has received an Order from the Authority imposing Nature and details of the action(s) / Penalty of Rs. 317,358/- along with Tax demand and applicable Order(s) passed Interest. Date of receipt of order from the Order received by the Company on July 15, 2026 authority; Details of the violation(s) / This issue pertains to the non-payment of IGST under Reverse contravention(s) committed or alleged Charge Mechanism on legal services received by the Company to be committed; from outside India during the period 2022-2023. Impact on financial, operation or other The Company is in the process of filing a revised return and will activities of the listed entity, discharge the demand raised by the Authority. Based on the quantifiable in monetary terms to the assessment, the financial implications of the order are not material extent possible and do not affect the Company's financial position or operations. The Company was in the process of reviewing the contents of the Reason for delay order for determining further steps. Particulars Information / Remarks State Tax Officer, (Legal & Adjudication), Chengalpattu Name of the authority(s); Intelligence Division, Chengalpattu. The Company has received an Order from the Authority imposing Nature and details of the action(s) / Penalty of Rs. 268,956/- along with Tax demand and applicable Order(s) passed Interest. Date of receipt of order from the Order received by the Company on July 13, 2026 authority; Details of the violation(s) This issue pertains to the non-payment of IGST under Reverse /contravention(s) committed or alleged Charge Mechanism on legal services received by the Company to be committed; from outside India during the period 2020-2021. Impact on financial, operation or other The Company is in the process of filing a revised return and will activities of the listed entity, discharge the demand raised by the Authority. Based on the quantifiable in monetary terms to the assessment, the financial implications of the order are not material extent possible and do not affect the Company's financial position or operations. The Company was in the process of reviewing the contents of the Reason for delay order for determining further steps. We request you to kindly take our aforesaid submission on record. Yours Sincerely, For Hindustan Oil Exploration Company Limited Baroruchi Mishra Managing Director & CEO DIN: 09223144 Registered Office: ‘HOEC HOUSE’, Tandalja Road, Off Old Padra Road, Vadodara - 390 020. INDIA. Phone: 91 (0265) 2330766 ● E-mail: contact@hoec.com ● Website: www.hoec.com