Αthens, July 4, 2017 – Hellenic Telecommunications Organization S.A. (OTE S.A. or Company), announces that Mr. Ioannis Mamakos, OTE Group Head of Investor Relations Subdivision, according to his transaction notification towards the Company dated 4/07/2017, sold, on 3/07/2017, 6,500 shares of OTE S.A. for a total value of €69,460.00.

This announcement is issued as a Regulated Information, in accordance with Law 3556/2007, [article 3, par. 1 p (bb), and article 21] and Regulation No 596/2014 of the European Parliament and of the Council on market abuse.