REN Redes Energeticas Nacionais SGPS S A : Deadline for the reception of the declarations of the shareholders to the financial intermediary regarding their intention to participate in the General Shareholders Meeting

Form for Statement of Participation in the General Meeting

Name: _____________________________

Address:___________________________

___________________________

Tax ID: ____________________________

To: [Identification of the Financial Intermediary]1

Address: ______________________________

______________________________________

Fax: __________________________________

Subject: General Meeting on May 9th, 2024

________________________________________________2, holder of ___________ ordinary shares with voting rights of

REN - Redes Energéticas Nacionais, SGPS, SA (REN), deposited with your institution, in the securities account(s) no.(s)_______________________, hereby declares, under the terms of no. 3 of article 23 -C of the Portuguese Securities

Code, his/her/its intention to participate in REN's General Meeting to be held on May 9th 2024. Therefore, the abovementioned shareholder herewith requests the following, under the terms and for the purposes of no. 4 of article 23 -C of the Portuguese Securities Code:

1. The issuance of a statement by your institution, in which the number of shares of REN registered in the signatory's

account at 00:00 a.m. (GMT) of May 2nd, 2024 (the "Record Date") is attested, along with the indication of the tax identification number of the signatory; and

b) The submission of the abovementioned statement to the attention of the Chairman of the General Meeting Board at REN's registered office located at Avenida dos Estados Unidos da América, no. 55, 1749-061 Lisbon, or to the e-mail address AG2024@ren.pt until 11:59 p.m. (GMT) of May 2nd, 2024, in such a way as to be received by the Chairman of the General Meeting Board in a timely and adequate form, in order to enable the expedite organization of the General Meeting.

Yours faithfully,

____________________, ________________/____/_______3

______________________________________4

1. Corporate name, in capital letters, of the financial institution in which the shares are registered.
2. Full name (natural persons) or corporate name (legal persons), in capital letters.
3. Place and date.
4. Signature identical to the one registered at the financial institution.

Explanatory Notes

1. The General Shareholders Meeting will be held on May 9th, 2024, at 10:30 a.m. (Lisbon Time), at Rua Cidade de Goa, nº 4, 2685-038 Sacavém (by virtue of the fact that the registered offices does not have satisfactory conditions for this purposes), in person and by telematic means, with the agenda and documentation mentioned in the Notice to Convene, which is available for consultation.
2. This statement shall be sent by the shareholders to the relevant financial intermediary, in order to be received by the latter until 11:59 p.m. (GMT) of May 1st 2024.
3. This form of statement envisages exclusively to facilitate the request of statements to be issued by the financial intermediary according to nos. 3 and 4 of article 23-C of the Portuguese Securities Code. However, additional requirements and payment of fees may be requested by the financial intermediaries issuing such statement.
4. For any queries, the following telephone number (+351) 210 013 900 and the email addressAG2024@ren.ptare available.