REN-Redes Energeticas Nacionais

Report Publication Announcement • Mar 21, 2023

Unofficial Translation This is an unofficial translation and it has been prepared for information purposes only. In the event of any discrepancy between this translation and the Portuguese version, the Portuguese version will prevail.

COMMUNICATION

In accordance with and for the purposes of article 17 of the Regulation (EU) No 596/2014, of the European Parliament and of the Council, of 16 April 2014, and other applicable regulations, REN – Redes Energéticas Nacionais, SGPS, S.A. hereby informs the market and the public of the following changes in the 2022 corporate events:

The Company's second quarter results that were scheduled to be released on the 27th of July of 2023, after the closing of the market, will be postponed to 20th of July, after market close. Consequently, the conference call initially scheduled for the 28th of July, will take place on the 21st of July.

All the other dates remain as described on the calendar released on the 16th of December 2022.

REN – REDES ENERGÉTICAS NACIONAIS, SGPS, S.A.

Lisbon, 21st of March 2023