REN Redes Energeticas Nacionais SGPS S A : Notice to Convene the Annual General Shareholders Meeting and deliberation proposals

REN - REDES ENERGÉTICAS NACIONAIS, S.G.P.S., S.A. - listed company Registered Office: Avenida dos Estados Unidos da América, no. 55, Lisbon

Share capital: 667,191,262 Euros

Company and registration number with the Lisbon Commercial Registry Office: 503 264 032

Non-binding translation For information purposes only

Note prior to the Notice to Convene

Information COVID-19

Portugal is on this date in a state of emergency declared under the terms of the Decree of the President of the Republic, no. 25-A/2021, of 11 March, due to the public health emergency caused by the COVID-19 disease, qualified by the World Health Organization as an international pandemic. The state of emergency has been embodied in specific measures determined by the Government, which significantly restrict the displacement of people.

Although it is unknown whether the state of emergency will be extended until the date set for this General Shareholders Meeting, it is not expected that on that date the national situation will be sufficiently normalised to allow the free movement of people and the Annual General Shareholders Meeting to be held in conditions that are safe for the health of all participants.

REN cares about the safety of its employees, members of corporate bodies, shareholders and other stakeholders, and has been following strict public health measures in the performances of its activities since the beginning of the current pandemic and intends to do the same in the organization and holding of its Annual General Shareholders Meeting.

In accordance with article 377(6), paragraph b) of the Companies Code, non in person general meetings are allowed, providing that the meetings can be held by telematic means, unless otherwise stated in the articles of association, and that the company must ensure the authenticity of the declarations and the security of the communications, registering their content and the respective intervening parties.

Pursuant to the "Recommendations in the context of General Shareholders Meetings" issued within the framework of cooperation between the Portuguese Securities Exchange Commission (CMVM), the Portuguese Institute of Corporate Governance (IPCG) and the Association of Listed Securities Issuers (AEM) with regard to the national Corporate Governance regime, and considering the current context resulting from the

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REN - REDES ENERGÉTICAS NACIONAIS, S.G.P.S., S.A. - listed company Registered Office: Avenida dos Estados Unidos da América, no. 55, Lisbon

Share capital: 667,191,262 Euros

Company and registration number with the Lisbon Commercial Registry Office: 503 264 032

Non-binding translation For information purposes only

impact of the new Coronavirus - Covid 19, "the holding of general shareholders meetings by means of distance communication constitutes, in this context, a highly recommended solution and the one that, among the available possibilities, ensures a greater compatibility of the interests at stake."

Bearing in mind the above, REN will hold its Annual General Shareholders Meeting exclusively by telematic means, promoting early voting by shareholders, both by post, as in previous years, and also introducing electronic correspondence voting and voting by electronic means. Please note that, for technical and security reasons, shareholders must exercise such voting rights before the meeting. Shareholders who have exercised their voting rights before the Meeting may, however, change their vote during the meeting, as described in the Notice to Convene.

In order to totally assure the right to information, this will be ensured also by telematic means, as described in the Notice to Convene.

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REN - REDES ENERGÉTICAS NACIONAIS, S.G.P.S., S.A. - listed company Registered Office: Avenida dos Estados Unidos da América, no. 55, Lisbon

Share capital: 667,191,262 Euros

Company and registration number with the Lisbon Commercial Registry Office: 503 264 032

Non-binding translation For information purposes only

NOTICE TO CONVENE

General Shareholders Meeting

I hereby convene all the shareholders of this Company to meet at the General Shareholders Meeting, on April 23rd, 2021, at 10:30 am (Lisbon time), to be carried out exclusively by telematic means with the following

AGENDA

• 1. Resolve on the approval of the consolidated and individual accounts' reporting documents referring to the financial year ended on December, 31st, 2020, accompanied, notably, by the legal certification of the accounts, the opinion of the supervisory body, the report of the Audit Committee, the corporate governance report, the consolidated non-financial statements and the remuneration report.

• 2. Resolve on the proposal for the allocation of profits in relation to the financial year ended on December 31st, 2020.

• 3. Perform the general appraisal of the management and supervision of the Company, in accordance with article 455 of the Portuguese Companies Code.

• 4. Resolve on the granting of authorization to the Board of Directors for the acquisition and sale of own shares by REN and subsidiaries of REN.

• 5. Resolve on the granting of authorization for the acquisition and sale of own bonds or other own debt securities by REN and subsidiaries of REN.

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REN - REDES ENERGÉTICAS NACIONAIS, S.G.P.S., S.A. - listed company Registered Office: Avenida dos Estados Unidos da América, no. 55, Lisbon

Share capital: 667,191,262 Euros

Company and registration number with the Lisbon Commercial Registry Office: 503 264 032

Non-binding translation For information purposes only

• 6. Resolve on the remuneration policy of the members of the management and supervisory bodies and of the General Shareholders Meeting Board.

• 7. Resolve on the appointment of the members of the corporate bodies of REN for the new term-of-office, corresponding to the three-year-period 2021-2023.

• 8. Resolve on the remuneration of members of the Remuneration Committee

INFORMATION TO THE SHAREHOLDERS AND QUORUM

If on the date set for the meeting, the General Shareholders Meeting may not be held, by absence of quorum, a second meeting is hereby convened, to be held on 10th May, 2021 through the same means and at the same time.

In accordance with the provisions of number 1 of Article 11 of the Articles of Association, in order for the General Shareholders Meeting to be held and adopt resolutions on the first meeting, shareholders representing at least 51% of the share capital must be present or represented.

All the information and preparatory documents regarding the Agenda (including those required by numbers 1 and 2 of article 289 of the Portuguese Companies Code and by number 1 of article 21-C of the Portuguese Securities Code) will be made available to shareholders for consultation purposes at REN's websitehttps://www.ren.pt/, from the date of the publication of the present Notice to Convene.

The accounts' reporting documents of the Company regarding the last financial year may equally be consulted as from the same date, at the Portuguese Securities Market Commissions' websitewww.cmvm.pt.

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