Athens Water Supply and Sewerage S A : Shareholders' Ordinary General Meeting 2024

INVITATION

To the Shareholders of the of the Shareholders of the Société Anonyme

"ATHENS WATER SUPPLY AND SEWERAGE COMPANY, S.A."

(EYDAP S.A.)

General Commercial Register Number 121578960000

to the 42nd Ordinary General Meeting

By a decision which taken in accordance with the Law and the Company's Articles of Association at its meeting of June 14, 2024, he Board of Directors of the Company named "Athens Water Supply and Sewerage Company (EYDAP S.A.)", the Shareholders of the Company are invited to the 42nd Ordinary General Meeting on July 11, 2024 , Thursday at 10:00 a.m. , which will meet at the Athens Stock Exchange, 110 Athens Ave., Athens, room "ERMIS" in person by the Shareholders as well as with the possibility of remote participation in real time using electronic media, to discuss and and decide on the following items of the Agenda:

1. Approval of the Individual and Consolidated Annual Financial Statements of EYDAP S.A. in accordance with International Accounting Standards and International Financial Reporting Standards (IFRS) of the corporate year 01.01.2023 to 31.12.2023, of the Management Report of the Board of Directors of EYDAP S.A. and of the Audit Report of the Certified Auditors of the EYDAP S.A.
2. Approval of dividend distribution of profits for the year 2023 to the Shareholders of EYDAP S.A., determination of the dividend beneficiaries and their payment start date.
3. Approval according to article 108 of Law 4548/2018 of the overall management of EYDAP S.A. by the Board of Directors and exemption of the Auditors from any liability for compensation for the corporate year 01.01.2023-31.12.2023 in accordance with par. 1, para. c of article 117 of Law 4548/2018
4. Amendment of the Articles of Association of EYDAP S.A
5. Approval of fees and expenses to the Members of the Board of Directors of EYDAP S.A. from 01.09.2023 to 31.12.2023.
6. Determination of fees and expenses of the Members of the Board of Directors of EYDAP S.A. for the corporate year 2024.
7. Submission of the Remuneration Report for the financial year 2023 in accordance with article 112 of Law 4548/2018.
8. Approval of the revision of the Remuneration Policy in accordance with articles 110 and 111 of Law 4548/2018.
9. Approval of revision of the Nomination Policy for the Members of the Board of Directors of EYDAP. S.A. in accordance with Law 4706/2020 and No. 60/18.09.2020 Circular of the Capital Market Commission.
10. Election of an Audit Company and approval of its remuneration for the financial year 01.01.2024-31.12.2024
11. Submission of the Audit Committee's Annual Report in accordance with article 44 par. 1 point i of Law 4449/2017

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1. Submission of a Report of the Independent Non-Executive Members of the Board of Directors of EYDAP S.A. in accordance with article 9 par. 5 of Law 4706/2020
2. Miscellaneous Announcements

In case of failure to reach the quorum required by the Law and the Articles of Association to decide on any issue of the Agenda, the Shareholders are invited to a Repetitive General Meeting, which will take place, without publication of a new Invitation, on July 22nd

• 2024 , Monday at 10:00 a.m. , and will meet at the Athens Stock Exchange, 110 Athens Ave., Athens, "ERMIS" room in person by the Shareholders as well as the possibility of participation remotely in real time using electronic media .

A. RIGHT TO PARTICIPATE AND VOTE IN THE ORDINARY GENERAL MEETING

In the Ordinary General Meeting, every legal entity or a person who has the status of shareholder at the beginning of the fifth (05) day before the day of the initial meeting of the General Assembly on July 6 2024 (record date) is entitled to participate and vote. The above recording date is also valid in the case of an adjourned or repeated meeting.

Anyone who appears on the date of registration as a registered shareholder in the records of the Intangible Securities System (S.A.T.) of the joint stock company "Hellenic Central Securities Depository S.A." (EL.K.A.T.) or the person identified as such on the basis of the relevant date through registered or other intermediaries in compliance with the provisions of the legislation (Law 4548/2018, Law 4569/2019, Law 4706/2020, Regulation (EU) 2018/1212 as well as the Regulation on the Operation of the Hellenic Central Securities Depository (Government Gazette B/1007/16.3.2021)

Proof of shareholding is provided by any legal way and in any case on the basis of information received by the Company from EL.K.A.T. up to and before the beginning of the General Meeting, if it provides registration services or through the participants and registered intermediaries in the Central Securities Depository in any other case. A shareholder may participate in the General Meeting on the basis of confirmations or notifications of Articles 5 and 6 of Regulation (EU) 2018/1212 provided by the 3 ombudsman, unless the Meeting refuses such participation for an important reason that justifies its refusal in accordance with the provisions in force (article 19 paragraph 1 of Law 4569/2018, article 124 paragraph 5 of Law 4548/2018). Each share entitles to one vote and voting is open.

The participation and voting rights does not require the blocking of the beneficiary's shares, nor the observance of any other similar procedure which limits the possibility of selling and transferring them during the period between the date of registration and the date of the General Meeting.

• PARTICIPATION AND EXERCISE OF VOTING RIGHTS AT A DISTANCE IN REAL TIME BY RESOURCES OF VIDEOCONFERENCING

In order for the Shareholders to participate and vote in the Ordinary General Meeting of July 11, 2024 or or its Repetitive General Meeting, remotely in real time via video conference without their physical presence, it is necessary to create and use an electronic account of the Shareholder or any of its representative on the electronic platform developed by the Hellenic Stock Exchange Group - Athens Stock Exchange S.A. for the provision of services for holding General Meetings remotely in real time via video conference to issuing companies on the website https://axia.athexgroup.gr.

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The online platform is provided by EL.K.A.T., while the ZOOM Meetings service from Zoom Video Communications, Inc. is used for the video conference.

To access the electronic platform, a computer or a smartphone or tablet-type mobile phone is required, with an installed web browsing application (browser) and the ability to access the internet.

In order to create the account of the Shareholder or his representative on the above electronic platform, a valid e-mailaddress (email) and the mobile phone of the Shareholder or his possible representative are required.

n the event that upon entering the electronic platform the above data entered by the

Shareholder are not identical to the data registered in the book-entry system and notified to the Company by the "Hellenic Central Securities Depository S.A." or through intermediaries, in the context of the services of facilitating the remote identification of Shareholders in general meetings that it provides to the issuing public limited companies in accordance with Part 3 of the decision no.8 of the Board of Directors of the Hellenic Central Securities Depository S.A. "Technical Terms and Procedures for the provision of the Registry, Corporate & Other Related Transactions Service" and the form "Terms and Conditions of the Distance General Meeting of Shareholders", the Shareholder should update or update the above data in order to create the account.

To this end and to avoid malfunctions, Shareholders are requested to contact the

Participant of the Securities Account at S.A.T. or other intermediary acting as the Shareholder's custodian, through which their shares are held, to notify and/or update their valid email address and mobile phone number for their identification.

Shareholders may contact the Company's Shareholder and Corporate Announcements Depertment for any questions and information by email at [e-mail] by phone at (+30) 210 21. 44.479 (during working days and hours).

Also, from the publication of this notice until the end of the General Assembly meeting, support and information will be provided to the Shareholders and their representatives, on issues related to the conduct of the General Assembly through the AXIA platform e - ShareholdersMeeting (e.g. login, vote, etc.) at (+30) 210 33.66.426 or by e-mail at AXIAeShareholdersMeeting @ athexgroup.gr.

The Shareholders who will participate in the General Meeting via video conference in real time are taken into account for the formation of the quorum and the majority and will be able to effectively exercise their rights during the General Meeting.

On the date of the General Meeting, in order to participate in its work, Shareholders must log in on time via the Online Platform, at least fifteen minutes (15') before the start time stated in this Invitation and declare the number of voting rights with which will participate in the General Assembly and vote and, if they wish to amend it (towards the smallest).

Shareholders who have successfully logged in to the online platform will be able to participate in the General Assembly via video conference in real time via a link, which will be sent to them via email.

By activating the ZOOM teleconferencing application through the link at the start of the General Meeting, Shareholders will be able to:

1. monitor the conduct of the General Assembly by electronic or audio-visual means,

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1. take the floor and address the General Assembly orally during the General Assembly, while at the same time through the online platform they will be able to:
2. vote in real time during the General Assembly on the issues of the Agenda, and
3. receive information about the registration of their vote.

C. PROCEDURE FOR REMOTE VOTING PARTICIPATION

HELD BEFORE THE GENERAL MEETING

(MAIL BALLOT)

1. The Shareholders are given the opportunity to participate by themselves or by their representatives remotely in the voting on the issues of the General Assembly (or any Repeated) that will be held before the General Assembly, under the conditions of article 126 of Law 4548/2018 and those mentioned below.
   Shareholders who wish to participate remotely in the voting on the issues of the Agenda that will be held before the General Assembly, can make use of the following possibilities:
2. 1. either to exercise the right to vote before the General Assembly through the online platformhttps://axia.athexgroup.grin which they will have previously created an account and successfully registered as mentioned under B above, no later than twenty-four (24) hours before the meeting of the General Assembly (i.e. no later than 10.07.2024 and time 10.00 am) .
   2. or fill in and send to the Shareholder and Corporate Announcements Service, at the address: Oropou 156, Galatsi, P.K. 111 46, the "Mail Ballot Form" which has been posted at the electronic address www.eydap.grat least twenty-four (24) hours before the meeting of the General Assembly (ie no later than 10.07.2024 at 10.00 am) .

The "Vote Ballot Form" must be signed by the Shareholder (or his representative) and deemed to be a genuine signature. Alternatively, the completed " Vote Ballot Form" can be signed by the Shareholder (or his representative) digitally using an approved digital signature (qualified certificate) and then sent via email to the email address: [e-mail] least twenty-four (24) hours before the meeting of the General Assembly (ie no later than 10.07.2024 at 10.00 am) .

1. or participate based on confirmations or notifications of Articles 5 and 6 of Regulation (EU) 2018/1212 provided by intermediaries.

Shareholders who vote according to the above before the General Assembly are counted for the formation of the quorum and majority, only if the relevant votes have been received by the Company no later than 10.07.2024 at 10.00 am.

1. . It is pointed out that Shareholders who wish to appoint proxies to participate remotely in the voting on the issues of the General Meeting that will be held before the General Meeting, will be able to appoint one (1) representative , whose appointment must be made at least forty eight (48) hours before the meeting of the General Assembly (i.e. no later than 09.07.2024 at 10:00 a.m.) , as specifically mentioned below under D.

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After this deadline, it will not be possible to participate by proxy in the voting that will be held before the General Assembly.

1. . In the event that the quorum required by the Law and the Articles of Association is not reached to decide on any issue of the original agenda on the date of July 11, 2024 , the right to vote remotely by postal vote must be exercised again for the Repeated General Assembly to be held on July 22 , 2024 at 10:00 a.m., in a vote that will be held before the Repeated General Assembly, in the following ways:
2. 1. either, by re-exercising the right to vote before the Repetitive General Meeting through the online platform https://axia.athexgroup.grwhere they will have previously created an account and successfully registered as mentioned under B above, no later than twenty four (24) hours before the meeting of the Repetitive General Assembly (ie no later than 21.07.2024 at 10.00 am) .
   2. or by filling and sending to the Shareholder Service and Corporate Announcements Department at: Oropou 156, Galatsi, P.K. 111 46, new "Vote Ballot Form" that will be made available by the Company for the issues on which no decision will have been taken at the initial session of the General Assembly on July 11, 2024, filled, signed and deemed to be genuine by the Shareholder (or his representative), or digitally signed by the Shareholder (or his representative) using an approved digital signature (qualified certificate), which will then be sent via email to the email address:[e-mail] least twenty-four (24) hours before the meeting of the Repetitive General Assembly (ie no later than 21.07.2024 at 10.00 am) .
   3. or participate based on confirmations or notifications of Articles 5 and 6 of Regulation (EU) 2018/1212 provided by intermediaries.

Shareholders who vote according to the above before the Repeated General Assembly are counted for the formation of the quorum and majority, only if the relevant votes have been received by the Company no later than 21.07.2024 at 10.00 am.

IV. For the possible Repeated General Meeting of July 22, 2024 , the Shareholders who did not appoint a representative during the initial General Meeting or the Shareholders who wish to replace the representative they had appointed, to participate remotely in the voting that will be held before the General Assembly, they will be able to appoint one (1) representative at least forty-eight(48) hours before the meeting of the Repetitive General Assembly (ie no later than 20.07.2024 at 10.00 am), as specifically mentioned below under D.

After this date, it will not be possible to participate by proxy in the voting that will be held before the Repeated General Assembly.

Shareholders may contact the Company's Shareholder and Corporate Announcements Department for any questions and information by email at [e-mail] by phone at (+30) 210 21. 44.479 (during working days and hours).

Also, the Shareholders are invited to ensure the confirmation of the successful sending of the "Vote Ballot Form" and its receipt by the Company and for this purpose they can call the following telephone number: (+30) 210 21.44.479 (Shareholder Services and Corporate Announcements Department).

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D. PARTICIPATION AND PROXY VOTING PROCEDURE

1. The Shareholder participates in the General Assembly and votes either in person or through a representative. Legal entities participate in the General Assembly through their representatives. Each Shareholder may appoint up to three (3) representatives. However, if the Shareholder owns shares of the Company, which appear in more than one securities account, this limitation does not prevent such Shareholder from appointing different representatives for the shares appearing in each securities account in relation to the General Meeting. A proxy acting for several Shareholders may vote differently for each Shareholder.

The Shareholder can appoint a representative for one or more General Meetings and for a certain period of time. The representative votes in accordance with the Shareholder's instructions, if they exist, and is obliged to file the voting instructions for at least one (1) year from the date of the General Meeting or, in the event of its postponement, from the date of the last Repeated Meeting in which he used of the proxy. The delegate's non-compliance with the instructions that has received does not affect the validity of the decisions of the General Assembly, even if the delegate's vote was decisive for achieving the majority. Regarding the appointment and revocation or replacement of the representative and the obligations of the Shareholder's representative, the provisions of article 128 par. 4 and 5 of Law 4548/2018 shall apply.

The Shareholder's representative is obliged to notify the Company before the beginning of the General Meeting, of any specific fact that may be useful to the Shareholders for the assessment of the risk that the representative will serve interests other than those of the Shareholder. Within the meaning of this paragraph, a conflict of interest may arise in particular when the representative:

1. Is a Shareholder who exercises control over the Company or another legal person or entity which is controlled by this Shareholder.
2. Is a Member of the Board of Directors or in general of the Management of the Company or a Shareholder who exercises control over the Company or another legal person or entity controlled by a Shareholder who exercises control over the Company.
3. Is an employee or auditor of the Company or of a controlling Shareholder of the Company or of another legal person or entity controlled by a controlling Shareholder of the Company.
4. Is a spouse or first-degree relative of one of the natural persons in cases a to c.

The appointment and revocation or replacement of the representative is done in writing or by electronic means and is notified to the Company at least forty-eight (48) hours before the meeting of the General Assembly, in accordance with the provision of paragraph 4 of article 128 of Law 4548/2018 .

II . Specifically for the Shareholder's participation by proxy in the General Meeting

of July 11, 2024 (or any Repetition thereof) , remotely in real time via video conference or for the Shareholder's participation by proxy in the voting on the agenda items to be held before the General Meeting, the Shareholder or the Participant of the Securities Account in S.A.T. or another mediator acting as the Shareholder's custodian may appoint one (1) representative, whose appointment is required to be made at least forty-eight(48) hours before the meeting of the General Assembly, i.e. no later than 07.09.2024 and time 10.00 am

For this purpose, the following forms are available from the Company:

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1. Representative appointment form for participation in the General Assembly of July 11, 2024.
2. Proxy appointment form for voting on the issues of the General Assembly of July 11, 2024, which will be held before the General Assembly.

These forms are available in electronic form on the Company's website www.eydap.grin the "Investor Relations" section and in printed form at the Shareholder Service and Corporate Announcements Service (Oropou 156, Galatsi).

In the representative appointment form, the Shareholder is required to fill in the full name, residential address and Police Identification Card or Passport Number. In the case of participation from a distance in real time via video conference, he must also fill in the representative's email address and mobile phone number. Upon receipt of the above information by the Company and based on the representative's email address and mobile phone number as stated in the appointment form, the representative's account is created by the Company on the electronic voting platform and then the representative is notified by email to activate his account in order to be able to exercise the Shareholder's rights.

These forms, filled in and signed by the Shareholder (or the Shareholder's representative in the case of a legal entity) with the original signature considered, are deposited or sent via post or courier service to the Shareholder and Corporate Announcements Service, Oropou 156, Galatsi, T .K. 111 46 . Alternatively, the said forms can be digitally signed with an approved electronic signature (qualified certificate) and then sent by email to the email address [e-mail] .

The forms must be submitted to the Company in one of the above ways no later than 48 hours before the General Assembly, i.e. no later than 07.09.2024 at 10.00 am.

Shareholders are invited to confirm the successful sending of the proxy appointment form and its receipt by the Company, and for this purpose they can call (+30) 210 21.44.479 (Shareholder Service and Corporate Announcements Department).

E. MINORITY RIGHTS

1. At the request of Shareholders representing at least one-twentieth (1/20) of the paid- up share capital, the Board of Directors of the Company is obliged to enter additional items in the Agenda of the General Assembly, which has already been convened, if the relevant request reaches the Board of Directors at least fifteen (15) days before the General Meeting (ie no later than 26 June 2024 for the initial meeting or 7 July 2024 for the repeat meeting). The additional matters must be published or notified, under the responsibility of the Board of Directors, according to article 122 of Law 4548/2018, at least seven (7) days before the General Meeting. The request for the inclusion of additional items in the Agenda is accompanied by a justification or a draft decision to be approved by the General Assembly and the revised Agenda is published in the same way as the previous Agenda, thirteen (13) days before the date of the General Assembly , while at the same time it is made available to the Shareholders on the Company's website ( www.eydap.gr ), together with thejustification or the draft decision submitted by the Shareholders in accordance with the provisions of paragraph 4 of article 123 of Law 4548/2018 . If these matters are not published, the requesting Shareholders are entitled to request the postponement of the General Meeting, in accordance with par. 5 of article 141 of Law 4548/2018 and to proceed with the

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publication themselves, as defined in the second paragraph of this paragraph, at the expense of the Company.

1. Shareholders representing one-twentieth (1/20) of the paid-up capital have the right to submit draft resolutions for issues included in the original or any revised General Assembly Agenda . The relevant application must reach the Board of Directors at least seven (7) days before the date of the General Assembly (ie no later than 07/04/2024 for the initial meeting or 07/15/2024 for the repeat meeting) , the plans and decisions are made available to the Shareholders, at least six (6) days before the date of the General Meeting.
2. At the request of a Shareholder or Shareholders representing one-twentieth (1/20) of the paid-up share capital, the Chairman of the Meeting is obliged to postpone once only the decision-making by the General Meeting, Regular or Extraordinary, on all or certain issues, setting a day for the continuation of the meeting, the one specified in the Shareholders' application, which cannot, however, be more than twenty (20) days from the date of postponement. The post-adjourned General Meeting is a continuation of the previous one and it is not necessary to repeat the formalities of publishing the Shareholders' Invitation. New Shareholders may also participate in this Meeting, subject to the relevant participation formalities.
3. By request from any Shareholder submitted to the Company at least five (5) full daysbefore the General Meeting (ie no later than 07/05/2024 for the initial meeting or 07/16/2024 for the repeat meeting), the Board of Directors is obliged to provide the General Assembly with the required specific information on the affairs of the Company, insofar as this is useful for the actual assessment of the issues on the Agenda. The Board of Directors can respond uniformly to Shareholders' requests with the same content. There is no obligation to provide information when the relevant information is already available on the Company's website, especially in the form of questions and answers. The Board of Directors may refuse to provide the information for any substantial reason, which is recorded in the minutes. Such a reason may be, under the circumstances, the representation of the requesting Shareholders in the Board of Directors, in accordance with articles 79 or 80 of Law 4548/2018.
4. At the request of Shareholders representing one-twentieth (1/20) of the paid-up share capital, the Board of Directors is obliged to announce to the General Assembly, if it is Ordinary, the amounts that, during the last two years, have been paid to each Member of the Board of Directors or the Directors of the Company, as well as any provision to these persons for any reason or contract of the Company with them. The Board of Directors can respond uniformly to Shareholders' requests with the same content. In all of the above cases, the Board of Directors can refuse to provide the information for a very substantial reason, which is recorded in the minutes. Such reason may be, under the circumstances, the representation of the requesting Shareholders in the Board of Directors in accordance with paragraphs 79 or 80 of Law 4548/2018.
5. By request of Shareholders representing one tenth (1/10) of the paid-up share capital, which is submitted to the Company at least five (5) fulldays before the General Meeting (ie no later than 07/05/2024 for the initial meeting or on July 16 , 2024 for the repeat) , the Board of Directors is obliged to provide the General Assembly with information on the course of corporate affairs and the Company's financial situation. The Board of Directors may refuse to provide the information for any substantial reason, which is recorded in the minutes. Such reason may be, under the circumstances, the representation of the requesting Shareholders in the Board of Directors, in accordance

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with articles 79 or 80 of Law 4548/2018, as long as the respective Members of the Board of Directors have received the relevant information in a sufficient manner.

In all cases, the requesting Shareholders must prove their shareholder status and, except in the case of paragraph 4 of this part, the number of shares they hold when exercising the relevant right by any legal means.

F. INQUIRIES OF SHAREHOLDERS

The Shareholders or their representatives who will participate either in person or remotely in real time via video conference in the General Meeting in accordance with the above mentioned under B will be able to submit questions during the Meeting regarding the issues of the Agenda.

In any case, for optimal preparation of the Meeting, Shareholders are given the opportunity to send their questions in advance, in writing, to the Company's Shareholder Service and Corporate Announcements Service via email to the email address eydap- [e-mail] no later than July 10, 2024 at 10:00 a.m.

G. AVAILABLE DOCUMENTS AND INFORMATION

The information and relevant documents of article 123 par. 3 and 4 of Law 4548/2018 and all the forms referred to in this Invitation are available in electronic form on the Company's website www.eydap.grin the "Investor Relations" section and in printed form at the Shareholder Service and Corporate Announcements Service (Oropou 156, Galatsi).

For any information, Shareholders may contact the Company's Shareholder Service and Corporate Announcements Service by email at [e-mail] by phone at (+30) 210 21.44. 479 ( responsible Mr. Christos Anderriotis ) .

Galatsi, June 14 , 2024

The Board of Directors

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