ANNOUNCEMENT OF BUSINESS DEVELOPMENTS

MOTOR OIL (HELLAS) CORINTH REFINERIES S.A. (the “Company”), further to its announcement dated 29 June 2026 regarding its continuous assessment of potential cooperation opportunities with other business groups in the natural gas market, hereby informs the investment community, in accordance with Regulation (EU) 596/2014 of the European Parliament and of the Council and the Rulebook of Euronext Athens, of the following:

The Company and AKTOR SOCIÉTÉ ANONYME HOLDING COMPANY TECHNICAL AND ENERGY PROJECTS (“AKTOR”) have entered into a framework term sheet in relation to the acquisition by AKTOR of a 50% equity interest in DIORIGA GAS S.A. (the “Proposed Transaction”). DIORIGA GAS S.A. is the project vehicle for the development and operation of a floating storage and regasification unit for liquefied natural gas in Greece (the “FSRU”), which is expected to be connected to the National Natural Gas Transmission System.

Pursuant to the above framework term sheet, completion of the Proposed Transaction is subject, among others, to the finalization and execution of definitive transaction documents between the parties as well as the granting of all required corporate, regulatory and other approvals.

The Proposed Transaction forms part of the Company’s broader strategy to develop critical energy infrastructure and strengthen its presence across the natural gas value chain, while further advancing the FSRU project by enhancing its financial, operational and commercial position.

The Company will continue to keep the investment community informed, in accordance with the applicable regulatory framework, of any material developments relating to the Proposed Transaction.

Maroussi, 9 July 2026