Athens International Airport S.A.

Notice of Dividend Amount • Apr 16, 2025

Announcement of the detachment of the right to the dividend / reinvestment of the dividend and payment of the dividend

The Company ATHENS INTERNATIONAL AIRPORT S.A. (the "Company") announces that the Ordinary General Meeting of the Shareholders of the Company dated April 14th, 2025, approved the distribution of a total dividend of €0.7862 per share for the financial year 2024. The above amount to be distributed is subject to withholding a 5% tax (with the exception or variation of the withholding rate for shareholders subject to special provisions).

Furthermore, the Ordinary General Meeting of the Shareholders of the Company dated April 14th, 2025, approved the introduction of a four-year dividend reinvestment program (2025–2028) (the "Dividend Reinvestment Program") and authorized the Company's Board of Directors to determine the specific terms of the Dividend Reinvestment Program on an annual basis, in execution and implementation of its general terms, as approved by the Ordinary General Meeting of Shareholders.

Pursuant to the authorization granted to it by the Ordinary General Meeting of the Shareholders, the Board of Directors of the Company, in executing and implementing the Dividend Reinvestment Program, by its decision dated April 15th, 2025, it resolved the increase of the Company's share capital up to the amount of €13,500,000 (the "Share Capital Increase"), by issuing up to 13,500,000 new common, dematerialized, registered voting shares, with a nominal value of €1.00 each (the "New Shares"), with the possibility of partial subscription in accordance with article 28 of Law 4548/2018, through the reinvestment of part of the dividend for the financial year 2024, totaling €100,000,000 (before withholding a 5% tax), by the beneficiaries of the dividend who choose to reinvest the above amount in an integer number of New Shares, instead of cash. The offer price of the New Shares will be equal to 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 reinvestment right (namely from 25.04.2025 to 02.05.2025), reduced by 3% (discount rate). In the case of a fractional amount, the offer price of the New Shares will be rounded up to the nearest second decimal digit.

More specifically, each eligible shareholder may reinvest in New Shares, in whole or in part, up to the amount of €0.3333333333 per share held on the record date for the beneficiaries of the dividend for the financial year 2024 (i.e. on 24.04.2025), 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"). The remaining amount of the dividend per share (namely €0.4528666667 per share, before withholding a 5% tax) will be paid in cash to the shareholders, regardless of their option to participate in the Dividend Reinvestment Program.

The election right, meaning the Shareholders' right to choose the manner in which they will receive the Reinvestment Amount either in cash and/or through reinvestment of all or part of the Reinvestment Amount in New Shares, shall be exercised within a fourteen (14) day period, commencing on the first

business day following the record date for the beneficiaries of the dividend for the financial year 2024, namely from 25.04.2025 until 08.05.2025.

The number of New Shares that an eligible shareholder may receive will be determined by dividing the total Reinvestment Amount each shareholder declares they wish to reinvest through the Share Capital Increase, by the offer price, rounded down to the nearest integer number in the case of a fractional amount. Any remainder of the Reinvestment Amount, due to rounding, will be paid in cash on the dividend payment date for financial year 2024, namely on 16.05.2025.

A shareholder of the Company who is not entitled to the required Reinvestment Amount to obtain at least one (1) New Share of the Company, based on the offer price, shall not be entitled to participate in the Dividend Reinvestment Program, and will receive the total Reinvestment Amount to which they are entitled exclusively in cash.

The amount corresponding to the New Shares issued at the offer price will be paid by offsetting, in accordance with article 20 para. 4 of Law 4548/2018, against the Reinvestment Amount of the shareholders who are eligible and choose to reinvest all or part of their Reinvestment Amount.

In the event of partial subscription of the Share Capital Increase, any unsubscribed New Shares will not be distributed to third parties or to other shareholders of the Company, instead, the Company's share capital will be increased up to the amount subscribed, in accordance with article 28 of Law 4548/2018 and the Company's Board of Directors will adjust article 5 of the Company's Articles of Association accordingly, defining the amount of capital resulting from the partial subscription of the Share Capital Increase.

Eligible for the dividend for financial year 2024 and the right to reinvest the Reinvestment Amount, through the Share Capital Increase, will be the Company's shareholders who are registered in the records of the Dematerialized Securities System ("D.S.S.") on Thursday, April 24th, 2025 (record date). As of Wednesday, April 23rd, 2025 (cut-off date), the Company's shares will be traded on the Athens Stock Exchange without entitlement to the dividend for financial year 2024 and without entitlement to reinvestment of the Reinvestment Amount. Dividend payment to beneficiaries will commence on Friday, May 16th, 2025, and will be processed through the paying bank "PIRAEUS BANK S.A.", as follows:

• 1. Through the operators of the beneficiaries in the D.S.S. (Banks, custodians, and securities firms), according to the ATHEXCSD Rulebook and ATHEXCSD's relevant resolutions.
• 1. Especially in cases of dividend payment to heirs of deceased beneficiaries, whose securities are kept in the Special Account of their Share in the D.S.S. under the management of ATHEXCSD, dividend payment process will be carried out after the completion of the legalization of their heirs, through the "PIRAEUS BANK S.A." branch network for five (5) years from the end of this year (namely, until December 31st, 2030).

The amounts payable to beneficiaries under case (2) shall be paid upon presentation of the Code Number D.S.S. account information and the police ID card, either in person or through a legally authorized representative.

Dividends not collected within five (5) years are prescribed to the Hellenic Republic.

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

Spata, 16.04.2025