MOTOR OIL (HELLAS) CORINTH REFINERIES S.A. hereby announces that the Board of Directors of the Company in its meeting dated October 31, 2025, decided the distribution of an interim dividend of Euro 0.35 per share as advance payment for the fiscal year 2025 dividend. It is noted that the interim dividend amount per share for the fiscal year 2025 will be increased proportionally with the amount of interim dividend corresponding to the Company’s treasury stock (2,448,898 shares). The latter shares are not entitled to the interim dividend. Subsequently, the gross amount of interim dividend for the fiscal year 2025 equals Euro 0.357911770 per share. The interim dividend amount is subject to a 5% tax imposed on dividends (that is Euro 0.017895588 per share) pursuant to articles 40 and 64 of the Law 4172/2013 (Government Gazette A’ 167/ 23.07.2013) as amended with the Law 4646/2019, article 24 (Government Gazette A’ 201/ 12.12.2019). As a result, the net payable amount will be Euro 0.340016181 per share. Company shareholders registered in the electronic files of the Dematerialized Securities System (DSS) dated Monday, 29 December 2025 (record date) for MOTOR OIL (HELLAS) CORINTH REFINERIES S.A. are entitled to the interim dividend amount. As of Tuesday, 23 December 2025, the shares will trade ex-interim dividend for the fiscal year 2025.

The payment of the interim dividend for the fiscal year 2025 to the shareholders will be effected through the payee bank - BANK OF PIRAEUS S.A. - on Monday, 5 January 2026 as follows:

-Through the participants in the Dematerialized Securities System (DSS) i.e. Banks and Brokerage/Securities Companies, according to the provisions of the DSS Operation Regulation of the Hellenic Central Securities Depository (ATHEXCSD).

-Especially in cases of payment of the interim dividend to the legal heirs of deceased entitled shareholders, whose securities are kept in the Special Account of their S.A.T. ID in the DSS under ATHEXCSD custody, the disbursement process will be facilitated, following completion of the inheritance procedural steps, through any branch of PIRAEUS BANK network over a period of time until 31^st December 2026.

From 31 December 2026 onwards, the payment of the interim dividend for the fiscal year 2025 shall be effected following prior communication with the Company’s Shareholder Services Department, which may be reached at the following telephone numbers: +30 210-809 4194 (Mr. Ioannis Dimakis), +30 210-809 4204 (Mr. Symeon Lymperakis), and +30 210-809 4187 (Ms. Dimitra Kalliontzaki).

It is clarified that according to the current applicable legislation the right for the collection of the interim dividend amount expires on completion of a five year period from the end of the fiscal year in which this right was created (i.e. for the said interim dividend of fiscal year 2025 of the Company the right for its collection expires on 31 December 2031) and following such time bar the uncollected amounts will irrevocably be reimbursed to the Hellenic State.

Maroussi, 17 December 2025

The Board of Directors