ANNOUNCEMENT OF BUSINESS DEVELOPMENTS

MOTOR OIL (HELLAS) CORINTH REFINERIES S.A. (the “Company”), further to its announcement dated 29 June 2026, 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 binding share purchase agreement (the “SPA”) for the sale to AKTOR of 75% of the shares of MANETIAL LIMITED, the 100% parent company of the companies operating under the trade names HELECTOR S.A. and THALIS E.S. S.A. (the “Target Companies”), and a wholly-owned subsidiary of the Company.

The agreed enterprise value of the Target Companies is €300 million (on a 100% basis). The consideration for the sale of the 75% stake will be determined at closing of the transaction, following the deduction of net debt and the application of the rest of the adjustments provided for in the SPA.

HELECTOR S.A. is active in the waste management sector, with a focus on the operation and management of waste treatment facilities and concession projects (PPPs), both in Greece and abroad, while THALIS E.S. S.A. is active in the design and construction of waste management projects and environmental infrastructure.

Completion of the transaction is subject to customary conditions precedent for transactions of this nature, including the receipt of any required approvals from the competent regulatory authorities.

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

Maroussi, 5 August 2026