Unofficial Translation

This is an unofficial translation of the proposal indicated below 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.

ANNOUNCEMENT

For the purpose of article 248-A of the Portuguese Securities Code, REN - Redes Energéticas Nacionais, SGPS, S.A. ("REN" or the "Company") makes the following statement:

Today, the Portuguese Energy Services Regulatory Authority ("ERSE") made public the final documents regarding the "Tariffs and prices for electricity for 2018 and parameters for the 2018-2020 regulatory period".

The referred documents did not introduce any material changes when compared with the draft proposal presented by ERSE on the past 13th of October and that was subject to a press release made by REN at the time.

Lisbon, December 15th 2017

REN - Redes Energéticas Nacionais, SGPS, S.A.

REN - REDES ENERGÉTICAS NACIONAIS, S.G.P.S., S.A.

Listed Company (Sociedade Aberta)

Share Capital: € 534,000,000

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

REN - Redes Energéticas Nacionais SGPS SA published this content on 15 December 2017 and is solely responsible for the information contained herein.
Distributed by Public, unedited and unaltered, on 15 December 2017 21:54:05 UTC.

Original documenthttp://www.ren.pt/en-GB/investidores/comunicados_a_cmvm/ficheiros_en/erses_decision_for_tariffs_and_prices_for_electricity_for_2018_and_parameters_for_the_2018_2020_regulatory_period

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