PPC S.A.

Transaction in Own Shares • Sep 11, 2025

Announcement – Regulated information

September 11, 2025

Public Power Corporation S.A. ("PPC") announces that in the context of its buy-back programme for the purchase of up to 38,200,000of its own shares, for the period from 09.09.2025 until 11.09.2025, PPC purchased through transactions in the Athens Exchange, 86,563Own Shares in total, as follows:

Date	Number of Shares	Weighted Average Price (€)
09.09.2025	31,848	14.1728
10.09.2025	25,000	14.0622
11.09.2025	29,715	14.0767

Following the abovementioned purchases, the Own Share Buyback Program that was approved by the Extraordinary General Meeting of Shareholders held on 27.06.2024 and the implementationof which started on 05.08.2024, pursuant to the Decision of the Board of Directors of PPCdated 16.07.2024, was concluded.

In particular, PPC holds a total of 18,563,971own shares, which correspond to 5.03% of its share capital. Taking under consideration the company actions and transactions duringthe currentprogramme that have alreadybeenannounced - and whichdo not change the maximum number of shares that PPC may purchase – the total number of shares issued by PPC that were acquired in the framework of the current buyback programme amounts to 38,200,000, that is the maximum provided for by the General Meeting of the Shareholders.

This announcement is issued in accordance with (EU) Regulation No 596/2014 of the European Parliament and of the Council dated 16.4.2014 and the Commission Delegated Regulation (EU) 2016/1052 dated 08.03.2016.

For further information please contact:

Investor Relations Division 30, Chalkokondyli str., 104 32 Athens Τ: +30 210 529 2153 +30 210 529 3665 +30 210 529 3207 ir@ppcgroup.com

The announcement may be accessed on the website of Public Power Corporation S.A. (www.ppcgroup.com) at the "Investors Relations" section.