PPC S.A.

Transaction in Own Shares • Sep 12, 2025

Announcement – Regulated information

September 12, 2025

The Public Power Corporation Societe Anonyme ("PPC"), following a) the 25.06.2025 resolution of the Annual General Meeting of its shareholders, which approved, among others, the establishment of an own share Buyback Program ("Own Shares" and the "Program", respectively), and b) the relevant 15.07.2025 decision of its Board of Directors, announces its intention to initiate the implementation of the Program.

The purchases of the Own Shares will be made on-market through members of the Athens Exchange. The Program concerns the acquisition of up to a maximum of 36,927,000 Own Shares, including the 18,563,971 own shares that have been acquired and are held by PPC, at a minimum purchase price of € 2.48 per share and a maximum purchase price of €29 per share. The time period during which purchases of Own Shares may be made is expected to begin on 12.09.2025 and to end on 12.09.2027, at the latest.

The purpose of the Program is to pursue and implement any lawful purpose, in accordance with the applicable provisions of the relevant legislative and regulatory framework.

The announcement is issued in accordance with (EU) Regulation No 596/2014 of the European Parliament and of the Council dated 16.04.2014 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.