Outcome of Board Meeting

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 October 13, 2026 By Online The Listing Department The Corporate Relationship Department National Stock Exchange of India Ltd., BSE Limited “Exchange Plaza”, Bandra Kurla Complex, 1st Floor, P. Jeejeebhoy Towers, Bandra (East), Mumbai – 400 051 Dalal Street, Mumbai – 400 001 Stock Code: HINDOILEXP Stock Code: 500186 Dear Sir / Madam, Sub.: Disclosure under Regulation 30 of SEBI (Listing Obligations and Disclosure Requirements) Regulations, 2015 (“SEBI Listing Regulations”) - Outcome of the Board Meeting held on October 13, 2026 Pursuant to Regulation 30 of SEBI Listing Regulations, we hereby inform you that the Board of Directors had at their meeting held on October 13, 2026, inter alia, transacted the following items of business.  Based on the recommendations of Nomination and Remuneration Committee & Audit Committee, the Board appointed Mr. Debabrata Das as Chief Financial Officer of the Company w.e.f. October 16, 2026. Mr. Debabrata would be based in the Corporate Office of HOEC in Chennai.  Took note of the resignation of Mr. Allen Joseph Andrade from the position of Chief Financial Officer of the Company w.e.f. close of business hours on October 15, 2026. Mr. Allen Andrade has chosen to step down from the position of CFO for personal reasons but would continue to support HOEC in the role of Financial Advisor to the Company. In this role he will operate remotely from Mumbai, with visits to Chennai Office on a need basis. The brief profile of Mr. Debabrata Das is given in Annexure 1. Also, the details in relation to the aforesaid resignation and appointment of CFO are given in Annexure 2. The Board meeting commenced at 2.45 p.m. and concluded at 3.30 p.m. The above information is also available on the website of the Company – www.hoec.com. 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 Encl: a/a 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 Continuation Sheet Annexure-1 Brief profile of Mr. Debabrata Das Mr. Debabrata Das is a Chartered Accountant with over 20 years of experience in senior finance leadership roles across the energy, city gas distribution, and infrastructure sectors. He has previously served as Group CFO at Haryana City Gas, Head of Corporate Finance at Adani Total Gas( a Joint Venture between Adani Group and TotalEnergies), and Lead – Project Finance at GMR Energy. He brings extensive expertise in fund-raising, capital structuring, and embedding governance and finance frameworks that drive sustainable profitability. Continuation Sheet Annexure-2 Information as required under Regulation 30 - Part A of Para A of Schedule III of SEBI Listing Regulations I. Resignation of Mr. Allen Joseph Andrade Resignation of Mr. Allen Joseph Andrade as Chief Financial Officer of the Company w.e.f. close of Reason for change business hours on October 15, 2026 due to personal reasons. Date of Cessation October 15, 2026 Resignation Letter Attached as Annexure 2A Disclosure of relationships between Directors NA Affirmation NA Names of listed entities in which the resigning NA director holds directorships, indicating the category of directorship and membership of board committees. II. Appointment of Mr. Debabrata Das Consequent to the resignation of Mr. Allen Joseph Andrade from his position as Chief Financial Officer of the Company, the Board, based on the Reason for change recommendations of Nomination and Remuneration Committee and Audit Committee, has considered and approved the appointment of Mr. Debabrata Das as Chief Financial Officer of the Company w.e.f. October 16, 2026. Date of appointment October 16, 2026 Brief Profile Attached as Annexure – 1 Disclosure of relationships Mr. Debabrata Das is not related to any Director of the Company. between Directors Affirmation NA Annexure 2A