Athens International Airport S.A.

Share Issue/Capital Change • May 13, 2025

Information Document

Pursuant to article 1 par. 5 g) of Regulation (EU) 2017/1129

for the admission to trading of 9,544,087 new common, dematerialized, registered voting shares, with a nominal value of €1.00 each, issued by "ATHENS INTERNATIONAL AIRPORT S.A." which resulted from the payment of part of the dividend from profits of the financial year 2024 in the form of shares of the same class as the shares in respect of which the dividend is paid

Date of issuance: May 13th, 2025

"ATHENS INTERNATIONAL AIRPORT S.A." (the "Company"), in relation to the extraordinary increase of the Company's share capital up to the amount of thirteen million five hundred thousand (€13,500,000) Euro, through the issuance of up to thirteen million five hundred thousand (13,500,000) new, common, dematerialized, registered voting shares, with a nominal value of €1.00 each (the "New Shares"), which is carried out through the reinvestment of part of the dividend of the financial year 2024, for a total amount of €100,000,000 (before 5% withholding tax) (the "Share Capital Increase"), which was decided by the Company's Board of Directors on April 15, 2025, pursuant to the authorization granted to it under article 24 para. 1 (b) of Law 4548/2018 by the Ordinary General Meeting of the Company's shareholders held on April 14, 2025, within the framework of the four-year dividend reinvestment program (2025– 2028) approved by the aforementioned Ordinary General Meeting (the "Dividend Reinvestment Program"), informs the investing public, in accordance with article 1 para. 5 (g) of Regulation (EU) 2017/1129, of the following:

1. Through the Share Capital Increase, the Company offered its shareholders the option to reinvest part of the dividend amount corresponding to them for the financial year 2024 in New Shares of the Company, at their discretion. Specifically, in accordance with the resolution of its Board of Directors dated 15.04.2025, the Company offered to the beneficiaries of the abovementioned dividend, and particularly the Company's shareholders who were registered in the files of the Dematerialized Securities System ("D.S.S.") on Thursday, 24.04.2025 (record date), the option to elect during the period from 25.04.2025 to 08.05.2025, the reinvestment in whole or in part, of an amount up to €0.3333333333 per share held as of the aforementioned record date, reduced by 5% (which either corresponds to the withholding tax rate on the distributable dividend or will be paid in cash to the Company's shareholders if the dividend is not subject to withholding tax) (the "Reinvestment Amount").

• 1. The offer price of the New Shares was calculated as the average of the volume-weighted average price (VWAP) of the Company's share over the first five (5) trading days of the period for the exercise of the right to reinvest the dividend, namely from 25.04.2025 to 02.05.2025, reduced by 3% (discount rate), and was determined at €8.88 per New Share.
• 1. According to the relevant orders of the dividend beneficiaries who chose to receive, in whole or in part, the Reinvestment Amount in New Shares, the amount reinvested in New Shares totals €84,751,492.56, corresponding to 9,544,087 New Shares, while the remaining amount of €148,461,875.71 (net payable amount) from the dividend for the financial year 2024 will be paid in cash to the beneficiary shareholders. Due to the abovementioned reinvestment of part of the dividend for the financial year 2024 in New Shares and, thus, the partial subscription of the Share Capital Increase, the Company's Board of Directors, by its resolution made on 12.05.2025 acknowledging the certification of the partial payment of the Share Capital Increase amount through offsetting, adjusted article 5.1 of the Company's Articles of Association to reflect the amount of the share capital as it resulted after the partial subscription of the Share Capital Increase.
• 1. Specifically, the Company's share capital was increased by €9,544,087 through the issuance of 9,544,087 new, common, dematerialized, registered voting shares with a nominal value of €1.00 each, at an offer price of €8.88 per New Share, while the difference between the nominal value of new shares and their offer price, totaling €75,207,405.56, was credited to the Company's "Par amount difference" account.
• 1. On 16.04.2025, the decision of the Ministry of Development General Secretariat of Commerce was registered with the General Commercial Registry (GEMI) under Registration Number 5355664, by which a) the increase of the Company's share capital up to €13,500,000 through the issuance of up to 13,500,000 new common, registered voting shares, and b) the relevant amendment to article 5.1 of the Company's Articles of Association, which were decided by the Company's Board of Directors' resolution on 15.04.2025, were approved. Finally, on 12.05.2025, the minutes of the Company's Board of Directors dated 12.05.2025 were submitted to GEMI, whereby a) the certification of the partial payment of the Share Capital Increase amount was acknowledged, in accordance with article 20 paras. 4, 6, and 7 and article 28 of Law 4548/2018, i.e. in the amount of €9,544,087 out of €13,500,000 of the Share Capital Increase, and the raising of funds through the Share Capital Increase totaling €84,751,492.56 (of which €75,207,405.56 is credited to the "Par amount difference" account), and b) the adjustment of article 5.1 of

the Company's Articles of Association regarding the share capital was resolved, as per the above.

• 1. The funds raised from the Share Capital Increase constitute Air Activities Capital, in accordance with the Airport Development Agreement dated 31.07.1995, ratified by Law 2338/1995, as amended and in force (the "ADA"), namely they will be used by the Company for the provision, construction, acquisition, maintenance, repair, renewal, upgrade and operation of the assets allocated to Air Activities, in accordance with the ADA.
• 1. The Company's 9,544,087 New Shares will be common, registered voting shares, with a nominal value of one Euro (€1.00) each, and will be entitled to participate in any subsequent dividend distribution, as well as in the four-year Dividend Reinvestment Program approved by the abovementioned Ordinary General Meeting of Shareholders, in accordance with the applicable legislation and the Company's Articles of Association, provided that the New Shares will have been credited to the accounts of the beneficiaries identified through the D.S.S. managed by the "HELLENIC CENTRAL SECURITIES DEPOSITORY S.A.", on the cut-off date of the relevant right to the distribution. The abovementioned 9,544,087 New Shares will be issued in the name of the beneficiary shareholders of the Company who exercised the right to reinvest part of the dividend for the financial year 2024.
• 1. The New Shares will be admitted to trading on the Main Market of the Athens Stock Exchange with ISIN code GRS536003007 and OASIS codes "ΔΑΑ" in Greek and "AIA" in Latin, together with the already listed 300,000,000 shares of the Company that trade under the same codes. The Company will follow the procedure for the admission of the abovementioned New Shares to the Athens Stock Exchange ("ATHEX"), in accordance with the provisions of the ATHEX Rulebook and the relevant resolutions of the Board of Directors of ATHEX. Trading of the New Shares on the Main Market of ATHEX is expected to commence on the first working day following the approval of their admission to trading by ATHEX. These shares will be registered with the records of ATHEXCSD and the D.S.S. securities shares and accounts as declared by the aforementioned beneficiaries, as provided by law, and any adjustment of the value of the Company's shares will be carried out in accordance with the ATHEX Rulebook and resolution no. 26 of the Board of Directors of ATHEX, as amended and in force. The Company will inform the investing public of the exact date of the admission of the New Shares to trading on ATHEX.

The persons responsible for the preparation of this information document as well as the accuracy of its content are Messrs. Panagiotis Michalarogiannis (Chief Finance and Administration Officer) and George Kallimasias (Chief Strategy Officer).

This Information Document can be obtained by interested parties in hard copy from the Company's offices (Athens International Airport, Administration Building (17), Spata 190 19, Attica) and in electronic form on the official website of the Company https://investors.aia.gr/en/.

For more information, shareholders are kindly requested to contact the Company's Shareholders and Corporate Announcements Department (Administration Building 17, P.C. 19019, Spata, Attica, tel: +30 210 35 35000, and email: ir@aia.gr).

ATHENS INTERNATIONAL AIRPORT S.A.