REN-Redes Energeticas Nacionais

Annual / Quarterly Financial Statement • Apr 19, 2022

Unofficial Translation This is an unofficial translation 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.

COMMUNICATION

REN – Redes Energéticas Nacionais, SGPS, S.A. hereby discloses to the market and the public the three documents attached to this communication, that, by mistake, were not published together with the Report and Accounts for the financial year 2021 disclosed on 29 March 2022, and which shall be considered an integral part of such Annual Report and Accounts.

REN – REDES ENERGÉTICAS NACIONAIS, SGPS, S.A.

Lisbon, April 19 th 2022

REN – REDES ENERGÉTICAS NACIONAIS, SGPS, S.A. REPORT AND OPINION OF THE AUDIT COMMITTEE CONSOLIDATED ACCOUNTS

Within the scope of its duties, the Audit Committee has monitored the development of the activity of REN – REDES ENERGÉTICAS NACIONAIS, SGPS, S.A. and its subsidiaries, supervised compliance with the law, regulations and the Articles of Association, supervised compliance with accountancy policies and practices, and supervised the process of preparation and disclosure of financial information, the legal review of accounts and the effectiveness of the internal control and risk management systems. It further supervised the activity of the Statutory Auditor and the External Auditor, including their independence and impartiality.

The Audit Committee also examined the consolidated financial information comprised within the Management Report and the financial statement of REN – REDES ENERGÉTICAS NACIONAIS, SGPS, S.A. and its subsidiaries attached thereto in relation to the financial year ended on December 31, 2021 which consist of the Consolidated Financial Statement, evidencing a total of 5,588,516 thousand Euros and 1,409,830 thousand Euros of Equity Capital, including a Consolidated Net Profit of 97,153 thousand Euros, the Consolidated Profit and Loss Accounts, Comprehensive Income, Changes in Equity Capital and Cash Flows in relation to the financial year closed on the abovementioned date and the respective Annex.

The Audit Committee reviewed the Legal Certification of Accounts and the Audit Report on the consolidated financial information, prepared by the Statutory Auditor and the External Auditor.

Within the context of the analysis undertaken, the Audit Committee further supervised the compliance and adequacy of the accounting policies, procedures, practices and adopted valuation criteria, as well as the regulatory and quality of the Company´s accounting information.

In light of the above, it is the opinion of the Audit Committee that the Consolidated Financial Statements and Consolidated Management Report, as well as the proposal expressed therein, abide by applicable accounting, legal and statutory provisions, therefore it recommends its approval by the General Meeting of Shareholders.

Lisbon, 24 March 2022

Manuel Sebastião (Chairman)

Rosa Maria Soares (Member)

Gonçalo Gil Mata (Member)

REN – REDES ENERGÉTICAS NACIONAIS, SGPS, S.A. REPORT AND OPINION OF THE AUDIT COMMITTEE INDIVIDUAL ACCOUNTS

Within the scope of its duties, the Audit Committee has monitored the development of the activity of REN – REDES ENERGÉTICAS NACIONAIS, SGPS, S.A. and its subsidiaries, supervised compliance with the law, regulations and the Articles of Association, supervised compliance with accountancy policies and practices, and supervised the process of preparation and disclosure of financial information, the legal review of accounts and the effectiveness of the internal control and risk management systems. It further supervised the activity of the Statutory Auditor and the External Auditor, including their independence and impartiality.

The Audit Committee also examined the individual financial information included in the Management Report and the financial statement of REN – REDES ENERGÉTICAS NACIONAIS, SGPS, S.A. attached thereto in relation to the financial year ended on December 31, 2021 which consist of the Balance Sheet as of December 31, 2021, evidencing a total of 4,674,427 thousand Euros and 1,402,118 thousand Euros of Equity , including Net Profit for the year of 100,792 thousand Euros, the Statements of Profit and Loss , Changes in Equity and Cash Flows in relation to the financial year closed on the above mentioned date and the respective Annex.

The Audit Committee reviewed the Legal Certification of Accounts and the Audit Report on the individual financial information, prepared by the Statutory Auditor and the External Auditor.

Within the context of the analysis undertaken, the Audit Committee further supervised the compliance and adequacy of the accounting policies, procedures, practices and adopted valuation criteria, as well as the regulatory and quality of the Company´s accounting information.

In light of the above, it is the opinion of the Audit Committee that the individual Financial Statements and Consolidated Management Report, as well as the proposal expressed therein, abide by applicable accounting, legal and statutory provisions, therefore it recommends its approval by the General Meeting of Shareholders.

Lisbon, 24 March 2022

Manuel Sebastião (Chairman) Rosa Maria Soares (Member) Gonçalo Gil Mata (Member)

Declaration of Conformity

DECLARATION PROVIDED IN THE ARTICLE 29-G (1) (C) OF THE PORTUGUESE SECURITIES CODE

In accordance with and for the purposes of article 29-G (1) (c) of the Portuguese Securities Code, each one of the members of the Board of Directors of REN – Redes Energéticas Nacionais, SGPS, S.A., nominally identified below, has underwritten the declaration transcribed hereafter 1 :

"I hereby declare, pursuant to and for the purposes specified in Article 29-G, No. 1, paragraph c) of the Portuguese Securities Code to the best of my knowledge, and serving as and in the scope of the functions assigned to me, based on the information made available to me, that the consolidated financial statements have been prepared in accordance with the applicable accounting standards, thus providing a true and fair view of the assets and liabilities, financial position and results of REN - Redes Energéticas Nacionais, SGPS, S.A. and of the companies included in its scope of consolidation, and that the management report relating to the tax year of 2021 faithfully describes the evolution of the business, the performance and position of the Company and those companies, within such period, and the impact on the respective financial statements, also containing a description of the main future risks and uncertainties."

Lisbon, March 24, 2022"

Rodrigo Costa (Chaiman of the Board of Directors and Chief Executive Officer)

João Faria Conceição (Member of the Board of Directors and Chief Operational Officer)

Gonçalo Morais Soares (Member of the Board of Directors and Chief Financial Officer)

Guangchao Zhu (Vice-President of the Board of Directors designated by State Grid International Development Limited)

Mengrong Cheng (Member of the Board of Directors)

Lequan Li (Member of the Board of Directors)

Jorge Magalhães Correia (Member of the Board of Directors)

Manuel Sebastião (Member of the Board of Directors and Chairman of the Audit Committee)

Gonçalo Gil Mata (Member of the Board of Directors of the Audit Committee)

Rosa Freitas Soares (Member of the Board of Directors of the Audit Committee)

Maria Estela Barbot (Member of the Board of Directors)

José Luis Arnaut (Member of the Board of Directors)

Ana Pinho (Member of the Board of Directors)

Ana da Cunha Barros (Member of the Board of Directors)

___________________________

¹ The original of the mentioned individual statements are available, for consultation, at the Company's head office.