REN-Redes Energeticas Nacionais

Board/Management Information • Aug 9, 2021

Unofficial Translation

This is an unofficial translation of the press release made below and it has been prepared for information purposes only. In the case of any discrepancy between this translation and the Portuguese version, the Portuguese version will prevail.

PRESS RELEASE

Pursuant to article 3(a) of the CMVM Regulation no. 5/2008, as amended, REN – Redes Energéticas Nacionais, SGPS, S.A. ("REN") hereby informs the market and the general public that Mr. Omar Al-Wahaibi presented yesterday, with effect from 31 August 2021, to the Chairman of the Board of Directors of REN his resignation as a Board member of REN.

Lisbon, 9 August 2021

End of press release

REN – REDES ENERGÉTICAS NACIONAIS, S.G.P.S., S.A. Listed Company Share Capital: 667,191,262 € Commercial Registry Office of Lisbon: registry and tax sole number 503 264 032 Head Office: Avenida Estados Unidos da América, no. 55 1749-061 Lisbon