26 JUN 2023

Announcement of ex-dividend date / dividend payment date

MYTILINEOS S.A.

General Commercial Register (GEMI) No.: 757001000

Announcement of ex-dividend date / dividend payment date

MYTILINEOS S.A. (the “Company”) in accordance with article 4.1.3.4 of the Athens Exchange (ATHEX) Regulation, announces the following:

The Annual Regular General Meeting of the Shareholders of the Company, held on June 1st, 2023, resolved, among others, to distribute a dividend in the amount of one euro and twenty eurocents (€1.20) per share. The final dividend amount that will be paid out stands at 1.2400060054 euros per share, increased by the dividend corresponding to 4,610,062 own shares that will be held by the Company on June 27th, 2023 (ex-dividend date). The dividend is subject to a 5% withholding tax, in accordance with the applicable tax provisions (with the exception or differentiation of such withholding for shareholders falling under special provisions. Therefore, the net amount of dividend which will be paid to shareholders will be 1.1780057052 euros per share.

The ex-date has been set to June 27th, 2023 and payment of the dividend to the beneficiaries shall commence on July 3rd, 2023. The beneficiaries of the dividend are the shareholders registered in the records of the Dematerialised Securities System (DSS) of the “Hellenic Central Securities Depository” on June 28th, 2023 (record date).

Payment of the dividend shall be effected through the bank “PIRAEUS BANK S.A.”, as follows:

(a) Through the operators of the beneficiaries in the DSS (Banks and Brokerage Firms), in accordance with the Rulebook of the Hellenic Securities Depository.

(b) Especially in cases of dividend payment to heirs of deceased beneficiaries, whose securities are kept in the Special Account of their Share in the DSS under the management of ATHEXCSD, dividend payment process will be carried out after the completion of the legalization of heirs, through "PIRAEUS BANK S.A." network for five (5) years from the end of this year (until December 31st, 2028).

Dividends which will not be collected within five (5) years from the end of this year, namely until December 31st, 2028, will be written off and transferred to the Greek State.

For additional clarifications or information, please contact the Company’s Investor Relations Department (Tel.: 210-6877300, fax 210-6877400).