MOTOR OIL (HELLAS) CORINTH REFINERIES S.A. announces that its Board in its meeting dated 28 April 2026, pursuant to the relevant decisions of the Extraordinary General Assembly of 22 March 2023 and the subsequent authorizations to the Board, approved the transfer of 289,101 treasury stock shares to the personal investment accounts held by executives of the Company and the Group in the Dematerialized Securities System (S.A.T) as follows:

An aggregate of 263,410 treasury stock shares will be transferred to fifteen (15) executives of the Company and the Group who opted to exercise their stock options maturing in April 2026 to purchase Company shares at the Grant Price of EUR 23.13 per share.

An aggregate of 527 treasury stock shares will be transferred to a Company Executive who opted to exercise stock options vested in April 2025 to purchase Company shares at the Grant Price of EUR 16.56 per share. The said options were exercisable on predetermined dates between 30 April 2025 and 31 October 2027.

An aggregate of 25,164 treasury stock shares will be transferred to eleven (11) executives of the Company and the Group (they are included in the executives who will exercise their stock options) as stock award free of payment.

All above beneficiaries will get Company shares without retention obligation.

All share transfers mentioned above will be effected by the means of Over The Counter (OTC-FOP) transactions on Thursday 30 April 2026 with same day clearance.

Furthermore, the Company Board in the same meeting mentioned above decided to suspend the current share buyback program only for the ATHEX session of Thursday 30 April 2026 which is the date the transfer of the 289,101 Company shares will take place.

Maroussi, 29 April 2026

The Board of Directors