MYTILINEOS HOLDINGS S.A.

General Commercial Register (GEMI) No.: 757001000

Announcement of ex-dividend date / dividend payment date

MYTILINEOS HOLDINGS S.A. (the “Company”) in line with its practice of providing the investing public, and its shareholders in particular, with reliable information, and in accordance with Law 3556/2007 and 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 7th June 2018, resolved, among others, to distribute a dividend in the sum of 0.32 euros per share which, after deduction of tax at 15%, results in a net payable dividend per share of 0.272 euros.

In the case of foreign dividend beneficiaries (natural persons or legal entities) who are residents in signatory countries, the tax deducted varies according to the provisions of the respective agreement for the avoidance of double taxation and in any case cannot exceed 15%.

The ex-date has been set to 11 June 2018 and payment of the dividend to the beneficiaries shall commence on 15 June 2018. As of ex-date, Company shares shall be traded in the Athens Exchange without a dividend right (ex-dividend). The beneficiaries of the dividend are the shareholders registered in the records of the Dematerialised Securities System (DSS) on 12 June 2018 (record date).

Payment of the dividend shall be effected in accordance with the procedure stipulated in article 5.5 of the ATHEX Regulation and the specific provisions of the DSS Regulation, as follows:

(a) Through the operators – that is, the trading companies selected by the shareholders themselves and authorised to collect the dividend. On 15 June 2018 the Company shall credit the operators' accounts, which in turn shall pay the relevant amounts to the beneficiaries. It should be noted that investors may revoke the authorisations granted to their operators by submitting an application to this effect to the Hellenic Stock Exchanges S.A. (HELEX), at least five (5) working days before the dividend payment date.

(b)    By deposit at their International Bank Account Number (IBAN), at which the investor has declared that he wishes to collect cash distributions in accordance with article 13 of the Regulation on the operation of the Dematerialized Securities System (DSS) and decision number 6 of the ATHEXCSD BoD, as in force, for those investors that do not wish to collect them through their operators. This only concerns investors that have declared a Bank of Piraeus IBAN.

(c) Starting on 15 June 2018 through the branch network of the BANK OF PIRAEUS for all other investors. In order to collect the pidend from the branch network of the Bank, investors must provide valid ID and the DSS account information. Payment to a third party can only take place if there is an authorization stating the full personal information of both the beneficiary as well as the person being authorized, and notarized by a public authority.

It should be noted that the Company does not possess own shares.

For additional clarifications or information, please contact the Company's Shareholders Department (Mr. Lattas Nikolaos Tel.: 210-6877300, 210-6877436, fax 210-6877400).