Athens, November 11, 2021 - Hellenic Telecommunications Organization S.A. ("OTE S.A." or the "Company") following the announcement for the Financial Calendar Update on 15.10.2021 and the decision of the Company's Board of Directors on 14.10.2021 for the distribution of an extraordinary dividend amounting to €0.248 gross per share after the sale of Telekom Romania Communications S.A., announces that:

The final dividend amount that will be paid out stands at €0.252068 gross per share, increased by the dividend corresponding to 7,371,353 own shares that will be held by the Company on November 15, 2021 (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 €0.2394646 per share.

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 November 16th, 2021 (Record Date).

The payment of the dividend will be conducted on Friday, November 19, 2021. On Monday, November 15, 2021, the Company shares will be trading without the right to the above extraordinary dividend (ex-dividend date).

1. Through the participants of the beneficiaries in the Dematerialized Security System (Banks and Brokerage Companies), 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 after the completion of the legalization of the heirs, through the network of "Piraeus Bank SA".

For any further Information, the Shareholders may contact the Investors Relations Department, tel.: +302106118190, +302106177981 and +302106115381 and e-mail: [email protected]  [email protected]  [email protected]  [email protected].

Any dividends that will not be collected within 5 years 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).

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