FINANCIAL CALENDAR

Athens, January 24, 2023 - Hellenic Telecommunications Organization S.A. ("OTE" or the "Company") announces, its 2023 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 2022, prepared in accordance with the I.F.R.S, will be released on Thursday, February 23, 2023 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 2022 financial results will take place on Thursday, February 23, 2023.

3.   The Ordinary General Meeting of the Company's Shareholders will take place on Wednesday, June 7, 2023.

4.  The ex-dividend date will be Wednesday, July 5, 2023. On that date, Company shares will be trading without the dividend right for year 2022. The ex-dividend date precedes the expiry of derivatives (July series).

5.  Beneficiaries of said dividend are those registered as Company's Shareholders on Thursday, July 6, 2023 (Record Date).

6.  Dividend payment will start on Tuesday, July 11, 2023.

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: