TERNA ENERGY S.A., in order to provide accurate and timely information to investors and pursuant to article 4.1.2 & 4.1.4.3.1. of the Athens Stock Exchange Regulation, announces its Financial Calendar of 2023:

Announcement and release of the Fiscal Year 2022 Annual Financial Results and posting of the Fiscal Year 2022 Annual Financial Report, pursuant to the legal provisions, on the company’s website (www.terna‐energy.com) as well as on the website of the Athens Exchange (www.athexgroup.gr):  Thursday, April 20, 2023, before the opening of ASE’s trading.

Analysts Annual Briefing: Thursday, April 20, 2023, 16:00 GR Time (CEST+1)

Ordinary General Assembly of Shareholders: Wednesday, June 14, 2023

The Company reserves the right to change the above dates following relevant notification to the
Investors.