FINANCIAL CALENDAR

Athens, February 5, 2024 - Hellenic Telecommunications Organization S.A. ("OTE" or the "Company") announces, its 2024 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 2023, prepared in accordance with the I.F.R.S, will be released on Thursday, February 22, 2024 on the Company's website:

(https://www.cosmote.gr/cs/otegroup/en/investor_relations.html) and on the website of the Athens Exchange.

2.  The analysts' briefing on the full year 2023 financial results will take place on Thursday, February 22, 2024.

3.  The Ordinary General Meeting of the Company's Shareholders will take place on Friday, June 28, 2024.

4.  The ex-dividend date will be Thursday, July 4, 2024. On that date, Company shares will be trading without the dividend right for year 2023. The ex-dividend date follows the expiry of derivatives (June series).

5.  Beneficiaries of said dividend are those registered as Company's Shareholders on Friday, July 5, 2024 (Record Date).

6.  Dividend payment will start on Wednesday, July 10, 2024.

It is noted that: (i) the Company reserves the right to alter the above dates after timely informing investors of the amendment hereof and (ii) the Ordinary General Meeting of the Company's Shareholders is entitled to resolve differently on the above matters, in accordance with applicable legislation and the Athens Exchange Rulebook.

FOR FURTHER INFORMATION:

OTE GROUP INVESTOR RELATIONS

Τel. +30 210-6117364, +30 210-6332342 +30 210-6118190

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