Release date of Q4 2024 Financial Results

Announcement

ATHENS, Greece - January 23, 2025 - Hellenic Telecommunications Organization SA (ASE: HTO,

OTC MARKET: HLTOY), announces that it will release its Q4 and 12M 2024 financial results on Wednesday, February 26, 2025, before the opening of the Athens Exchange.

OTE's management will host a conference call to review the results on the same date at 13:00 (GREECE) / 12:00 (CONTINENT) / 11:00 (UK) /06:00 (EASTERN US).

Please find below details regarding the conference call dial-in and replay numbers as well as the live audio webcast:

Conference Call Details

Date: Wednesday, 26th February 2025

Time: 13:00 Athens Time (C.E.T. +1)

We recommend that you call any of the above numbers 5 to 10 minutes before the conference call is scheduled to

start.

Webcast Details

To participate via webcast you may join by linking at the internet site: https://87399.themediaframe.eu/links/otegroup250226.html

If you experience difficulty, please call: + 30 210 9460803

Digital Playback Details

A digital playback of the conference call will be available approximately one hour after the end of the

conference call until end of business day of 26th March 2025.

If you are interested to listen to the play back, please dial one of the following

The playback conference call number is: 808#

FOR FURTHER INFORMATION

OTE GROUP INVESTOR RELATIONS

Τel. +30 210-6117364, +30 210-6332342 +30 210-6118190 E-mail: iroffice@ote.gr, eboua@ote.gr