ANTIN // 2021 Universal Registration Document

FINANCIAL STATEMENTS 6 Notes to the consolidated financial statements

Notes to the accounting and consolidation principles

Note 1 General information

Note 2 Accounting principles 2.1 Basis of preparation of financial statements Antin’s Consol idated Financial Statements have been prepared in accordance with International Financial Reporting Standards (IFRS) published by the International Accounting Standards Board (IASB) as adopted by the European Union as of 31 December 2021. These international standards include IAS (International Accounting Standards), IFRS (International Financial Reporting Standards) and their interpretations (SIC and IFRIC). The Consolidated Financial Statements comply with Article 4 of the EU IAS Regulation. Antin Infrastructure Partners S.A. was incorporated in June 2021. On the date of pricing of the IPO, pursuant to contribution agreements, the Initial Shareholders of Antin Infrastructure Partners SAS (“ AIP SAS ”) and Antin Infrastructure Partners UK Limited (“ AIP UK ”) have contributed to the Company all of the shares of AIP SAS and AIP UK in exchange for newly issued shares of the Company. Following the contributions in kind, Antin Infrastructure Partners S.A. became the parent company of the Group. Prior to the contributions in kind, AIP SAS and AIP UK were two sub-groups under common ownership and control by the partners of Antin. The contributions in kind are outside the scope of IFRS 3 because the entities AIP SAS and AIP UK have been under common control. The comparative financial statements presented for the year ended 31 December 2020 correspond to the combined accounts for AIP SAS and AIP UK, including their subsidiaries. These financial statements present the Group’s pro-forma combined financials, with the comparative information for the year ended 31 December 2021 constituting the Group’s Consolidated Financial Statements. Antin’s Consolidated Financial Statements were authorised for issuance by the Board of Directors on 23 March 2022. The Consolidated Financial Statements are subject to approval by the Shareholders at the annual shareholders meeting scheduled to take place on 24 May 2022. Antin Infrastructure Partners S.A. (the “ Company ”) is a limited company ( société anonyme ) incorporated under the laws of France, having its registered office at 374, rue Saint-Honoré, 75001 Paris, France, registered with the Paris Register of Commerce and Companies ( Registre du commerce et des sociétés ) under number 900 682 667 RCS Paris. The Company is listed on Euronext, Paris.

The Consol idated Financial Statements comprise Antin Infrastructure Partners S.A. and its direct and indirect subsidiaries, together referred to as Antin (“ Antin ” or the “ Group ”). The principal activity of Antin is the management of investment funds specialised in Infrastructure (energy & environment, telecom, transportation and social infrastructure).

2.2 Basis of measurement of assets and liabilities Assets and liabilities are measured at historical cost, except for the revaluation of certain financial instruments that are measured at fair value at the end of the reporting period. 2.3 Transactions in foreign currencies Transactions in foreign currencies are translated into euros at the exchange rate recorded at the date of the transaction. 2.4 Functional currency and reporting currency The Consolidated Financial Statements are presented in euros, which is the functional currency and reporting currency of Antin. The functional currency reflects the primary economic environment in which Antin operates. All amounts are presented in thousands of euros and rounded to the nearest thousand euros, unless otherwise indicated. Rounding applied in tables and calculations may result in a presentation, whereby the total amounts do not precisely match the sum of the rounded amounts. Monetary assets and liabilities denominated in foreign currency are translated into euros at the exchange rate prevailing at the reporting date. Non-monetary assets and liabilities that are measured at fair value in a foreign currency are translated into euros at the exchange rate when the fair value was determined. Income statement items recorded in currencies other than euros are translated at the average exchange rate during the respective period.

The principal foreign exchange rates applied in the preparation of the Consolidated Financial Statements are as follows:

Closing rate

Average rate

2021

2020

2021

2020

EUR/GBP EUR/USD EUR/SGD

0.8403 1.1326 1.5279

0.8990 1.2271

0.8600 1.1835 1.5897

0.8892 1.1413

n.a.

n.a.

Exchange rate differences resulting from the translation of the financial statements into euros are recorded in other comprehensive income.

138 ANTIN INFRASTRUCTURE PARTNERS S.A. - UNIVERSAL REGISTRATION DOCUMENT 2021