ANTIN // 2021 Universal Registration Document

INFORMATION ON THE SHARE CAPITAL AND MAJOR SHAREHOLDERS

Information on the share capital

8.2.3 Authorisation to purchase shares

Legal framework The Combined Shareholders' Meeting held on 14 September 2021 authorised, in its 6 th resolution, a program for the Company to buy back its own shares capped at 10% of the total number of shares comprising the share capital at any time or 5% of the total number of shares with a view to their retention and subsequent delivery in payment or exchange in connection with any external growth transaction. The Board of Directors is thus authorised to repurchase 17,456,244 shares of the Company. The authorisation was granted for 18 months. The maximum repurchase price under this authorisation is 200% of the price of the IPO, i.e. €48 with a maximum total amount of €300,000,000. It should be noted that the Annual Shareholders' Meeting to be held on 24 May 2022 will be asked to authorise, in its 14 th resolution, a program for the Company to buy back its own shares capped at 10% of the total number of shares comprising the share capital at any time or 5% of the total number of shares with a view to their retention and subsequent delivery in payment or exchange in connection with any external growth transactions. This authorisation would be granted for 18 months and would cancel and replace the equivalent delegation of financial authorisation granted by the Combined Shareholders' Meeting held on 14 September 2021. It could not be implemented by the Board of Directors during a period of takeover bid for the Company’s shares. The maximum repurchase price under this authorisation would be €50 per share with an overall ceiling of €872,812,220. In accordance with applicable regulations and market practices permitted by AMF, the objectives of the share buyback program are as follows: 3 to enable an investment service provider to maintain the liquidity of the shares of the Company within the framework of a liquidity contract in compliance with market practices approved by the AMF; 3 to allocate shares as part of Antin’s stock purchase option plans, free share plans, profit sharing program and any Group savings plan or other allocations of shares to employees or corporate officers of the Company and its affiliates and carry out all hedging operations related to these transactions;

3 to deliver shares on the occasion of the exercise of rights attached to securities giving access to the Company’s share capital and carry out all hedging operations related to these transactions; 3 to retain them pending a delivery of shares (as an exchange, payment or other consideration) in the context of acquisitions, mergers, spin-offs or asset contributions; 3 to cancel all or part of the shares thus purchased; and 3 to pursue any other purpose that has been or may be authorised by legislation or regulations in force, or by any market practice that may be admitted by the AMF, it being specified that in such a case, the Company would inform its shareholders by means of a press release. Liquidity contract The Company entered into a liquidity contract with BNP Paribas Exane on 9 February 2022. The Board of Directors, at its meeting on 23 March 2022, approved the implementation of the 6 th resolution of the Combined Shareholders' Meeting of 14 September 2021, for the purposes of activating the liquidity agreement as of 25 March 2022. The Company will publish a half-year and an annual report of its liquidity contract. Summary of transactions on shares held by the Company as of 31 December 2021 As of 31 December 2021, the Company does not hold any treasury shares.

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