Athens, July 3, 2023 - Hellenic Telecommunications Organization S.A. ("OTE S.A." or the "Company") announces that the Company's Ordinary General Meeting of Shareholders of June 7^th, 2023, approved the distribution of dividend amounting to €0.5765 gross per share. The final dividend amount that will be paid out stands at €0.58878 gross per share, increased by the dividend corresponding to 9,041,942 own shares that will be held by the Company on July 5 2023 (ex-dividend date). The dividend is subject to a 5% withholding tax, in accordance with the applicable tax law provisions (art. 64 of Law 4172/2013 as in effect) 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 €0.559341 per share.

On Wednesday, July 5, 2023 the Company's shares will trade ex-dividend. Beneficiaries of the said dividend are the Shareholders registered in the Dematerialized Securities System (of the company "HELLENIC EXCHANGES S.A. HOLDING, CLEARING, SETTLEMENT & REGISTRY (HELEX)" on Thursday July 6, 2023 (Record Date).

The payment of the dividend will be conducted on Tuesday, July 11, 2023 by "PIRAEUS BANK S.A.", as follows:

1. Through the participants of the beneficiaries in the Dematerialized Security System (Banks and Brokerage Companies), i.e the beneficiaries will receive the dividend through their participants, in accordance with the regulations in force of EL.K.AT.

2. 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 supervision of ATHEXCSD, the dividend payment process will be carried out through the network of "Piraeus Bank SA", after the completion of the legalization of the heirs.

For any further Information, the Shareholders may contact the Investors Relations Department, tel.: +302106115381, +302106332342, +302106117364 and e-mail: [email protected] [email protected].

Any dividends that will not be collected within 5 years that is until 31-12-2028 will be written off in favor of the Hellenic State.

This announcement is issued in accordance with Law 3556/2007 and the Athens Exchange Regulation (article 4.1.3.4).

FOR FURTHER INFORMATION:

OTE GROUP INVESTOR RELATIONS

Τel. +30 210-6117364, +30 210 6118190

E-mail: [email protected], [email protected]