REN Redes Energeticas Nacionais SGPS S A : Deadline for the reception of the proxy letters

Draft proxy letter1

To the

Chairman of the General Meeting Board of

REN - Redes Energéticas Nacionais, SGPS, SA Av. Estados Unidos da América, no. 55 1749-061 Lisbon

AG2024@ren.pt

Subject: General Meeting held on May 9th, 2024

_________________________________2, bearer of the identification document ____, issued on _______ by

__________, with the tax identification number ________________, holder of ______ ordinary shares of REN -

Redes Energéticas Nacionais, SGPS, S.A. (REN), under the terms of article 380 of the Portuguese Companies Code, hereby appoints __________________________________, as his/her/its representative(s), to whom

he/she/it grants the necessary powers to:

1. Act for and on behalf of the shareholder at the General Meeting of REN to be held on May 9th, 2024, at 10:30 a.m. (Lisbon Time)
2. Assess, intervene, discuss, propose and vote, as he/she/it/they deem(s) more appropriate, on behalf of the shareholder, all the items on the agenda for said General Meeting of REN, including those which may arise in the course of the meeting or after the issuance of this letter, due to unpredictable circumstances.

____________________, _____________/____/_______3

______________________________________4

1. This proxy letter must be received at REN's registered office or at AG2024@ren.pt until 05:00 p.m. of the second to last business day prior to the meeting, (i.e., until 05:00 p.m. (Lisbon Time) of May 7th, 2024). The submission of this letter does not exempt from compliance with the formalities set forth by numbers 3 and 4 of article 23-C of the Securities Code and by the Notice to Convene.
2. Full name (natural persons) or corporate name (legal persons), in capital letters.

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Place and date.

Signature as written in the identity card/passport (natural persons) / signature(s), name(s), capacity and company stamp (legal persons).