FINANCIAL CALENDAR

Athens, February 21, 2018 – Hellenic Telecommunications Organization S.A. (“OTE” or the “Company”) announces, its 2018 Financial Calendar, pursuant to paragraphs 4.1.2.1.(b) and 4.1.3.15.1 of the Athens Exchange Rulebook, according to which:

1. The Annual Stand Alone and Consolidated Financial Statements for the fiscal year 2017, prepared in accordance with the I.F.R.S, together with the table with the financial data and information deriving from said Financial Statements, will be released on Thursday, February 22, 2018 on the Company's website (https://www.cosmote.gr/fixed/corporate/ir) and on the website of the Athens Exchange and will appear on the press on the day following their release.
2. The analysts briefing on the full year 2017 financial results will take place on Thursday, February 22, 2018.
3. The Ordinary General Meeting of the Company's Shareholders will take place on Tuesday, June 12, 2018 at OTE S.A. headquarters, 99 Kifissias Av., Maroussi, Athens.
4. The ex-dividend date will be Thursday, June 28, 2018. On that date, Company shares will be trading without a dividend right for the year 2017. The ex-dividend date follows the expiry of derivatives (June series).
5. Beneficiaries of said dividend are the Company's Shareholders registered on Friday, June 29, 2018 (Record Date).
6. Dividend payment will start on Wednesday, July 4, 2018.

It is noted that: (i) the Company retains the right to alter the above dates after duly advising the investing public of the amendment hereof and (ii) the Ordinary General Meeting of the Company's Shareholders is entitled to resolve differently on the above matters, according to the applicable legislation and Athens Exchange Rulebook.