REN Redes Energeticas Nacionais SGPS S A : Deadline for the reception of the statements of the shareholders to the Chairman of the General Shareholders Meeting Board confirming the non-existence of control by the shareholder over any entity performing one of the activities from among electricity or natural gas generation or supply, or the non-existence of a risk of conflict of interests recognised by ERSE

Form for Declaring the Inexistence of Conflict of Interest and Intention to Participate

and/or Vote by Telematic Means

Name:_____________________________

Address:___________________________

___________________________

Tax ID: ____________________________

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 on May 9th, 2024

________________________________________________1 , holder of ______ ordinary shares with voting rights of REN

- Redes Energéticas Nacionais, SGPS, SA (REN), informs of his/her/its intention to participate in REN's General Meeting to be held on May 9th, 2024, in person and by telematic means.

• Intends to participate in the Shareholders Meeting in person (personally or through representative).
• Intends to participate in the Shareholders Meeting by telematic means / intends to vote in the electronic platform and for such purpose, informs that the email to which the access codes for the General Meeting, as well as the codes for the electronic voting should be sent is the following____________________________2.
• Is an investor who holds shares through a professional shareholder, who holds the shares in its own name but on behalf of the investor, and will submit the specific voting instructions for each item on the agenda directly to the professional shareholder.

In addition, declares, for all due purposes (namely, compliance with the Decision of ERSE - Entidade Reguladora dos Serviços Energéticos of 31.07.2015), that he/she/it is not prevented from exercising the political shareholder rights inherent to any shares representative of the share capital of REN, since he/she/it does not exercise, directly or indirectly, control over any entity that performs one of the activities from among the generation or supply of electricity or natural gas.

Yours faithfully,

____________________, ____________/____/_______4

______________________________________5

(Signature)

1. Full name (natural persons) or corporate name (legal persons), in capital letters.
2. The access to the General Meeting and to the electronic voting shall be made exclusively with the codes sent to this

email.

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

Explanatory Notes

1. The submission of this statement does not exempt the shareholder from compliance with the additional formalities set forth by the Notice to Convene, which is available for consultation.
2. The General Shareholders Meeting will be held on May 9th, 2024, at 10.30 a.m. (Lisbon Time), in person and by telematic means, with the agenda and documentation referred to in the Notice to Convene, which is available for consultation.
3. This statement shall be sent by the shareholders to the Chairman of the General Meeting Board, for the same to be received until 11:59 p.m. (GMT) of April 31st, 2024.
4. For any queries, the following telephone number (+351) 210 013 900 and the email addressAG2024@REN.ptare available.