Enagás S A : Procedure for voting and appointing proxies at a General Shareholders' Meeting by telematic means of communication and remote attendance and voting

PROCEDURE FOR VOTING AND APPOINTING PROXIES AT A GENERAL SHAREHOLDER'S MEETING BY TELEMATIC MEANS OF COMMUNICATION AND REMOTE ATTENDANCE AND VOTING

Pursuant to Articles 189, 190.1 and 521 of the Corporate Enterprises Act, Article 27 of the Company's Articles of Association and Articles 1, 10, 11.1 and 11.2 (B) of the Rules and Regulations of General Shareholders' Meetings, all the Company's shareholders entitled to vote may do so and appoint proxies by telematic means of communication, except on resolutions in which they have a conflict of interest, in accordance with the Corporate Enterprises Act, the Articles of Association and the Rules and Rules and Regulations of General Shareholders' Meetings, by i) post and

1. electronic communication. They may also submit their vote at the Shareholder Information Office.

For these purposes, the aforementioned articles of the Company's Articles of Association and the Rules and Regulations of General Shareholders' Meetings confer on the Board of Directors the powers necessary to implement specific rules and regulate the exercise of voting and proxy rights by means of remote communication, and to decide on the electronic or telematic means that may be used at each Meeting to attend and/or appoint proxies and cast votes, having regard to the state of the art.

By virtue of this delegation of authority, at its meeting on February 20, 2023 the Board of Directors of Enagás, S.A. (hereinafter the "Company") agreed that at the next General Shareholders' Meeting, scheduled to be held upon first call in Madrid on March 29, 2023 at 12.00 pm at Paseo de la Castellana 33, Madrid (premises of Mutua Madrileña) and, if the shareholders then present fail to constitute a quorum as required by law and the Articles of Association, to be held upon second call on March 30, 2023 at 12:00 pm, also at Paseo de la Castellana 33, Madrid (premises of Mutua Madrileña), the following rules concerning voting and appointment of proxies by remote means of communication and remote attendance and voting will apply.

1.- VOTING REMOTELY PRIOR TO THE GENERAL MEETING.

Pursuant to Article 27 of the Articles of Association and Articles 1, 11.1 and 11.2 (B) of the Rules and Regulations of General Shareholders' Meetings, voting on resolutions on items of business on the Agenda may be exercised by the shareholders prior to the General Shareholders' Meeting by i) post, ii) electronic communication, or iii) at the Shareholder Information Office in accordance with the following instructions.

1.1.- Voting by post.

Shareholders wishing to vote by post must send the Company (Enagás, S.A. - Shareholder Information Office - Paseo de los Olmos 19, 28005 Madrid) the attendance, proxy and voting card issued by entities that are members of the Sociedad de Gestión de los Sistemas de Registro, Compensación y Liquidación de Valores (IBERCLEAR, the Spanish Central Securities Depository), setting out the identity of the shareholder, the number of shares they hold, and vote on each item of business on the Agenda, bearing a handwritten signature. If shareholders are legal

In the event of any discrepancy between the Spanish version and this translation into English, the Spanish version shall prevail.

persons, in addition to the handwritten signature of the representative they must also provide a document that constitutes a legal accreditation of representation.

In the event that the card issued by the IBERCLEAR participating entity does not include a section relating to "Remote Voting" or is incomplete, the shareholder may complete it using the card template that the Company has made available on the Company's website (www.enagas.es). This card, duly completed and signed, must be sent to the Company.

1.2.- Voting by electronic means of communication.

Shareholders wishing to vote through telematic means must do so using the General Shareholders' Meeting section on the "Investor relations" page of the Company's website (www.enagas.es), by following the instructions provided for that purpose on each of the windows of said website and filling out the forms provided. To do this, they will provide proof of identity via a legally recognised electronic signature endorsed by the guarantees stipulated below, stating the number of shares owned and how they intend to vote on each item on the Agenda.

Pursuant to Articles 27 of the Articles of Association and 11.2 (B) of the Rules and Regulations of General Shareholders' Meetings, the guarantee the Board of Directors considers appropriate to ensure the authenticity and identification of a shareholder exercising voting rights is the electronic signature recognised pursuant to the terms of Law 6/2020 of November 11 regulating certain aspects of electronic trust services, provided the signature is based on (i) an Electronic User Certificate issued by the Spanish National Mint's Public Certification Authority (CERES) concerning which no revocation has been recorded, or (ii) the recognised electronic certificate incorporated in the Spanish national identity card issued pursuant to Royal Decree 1553/2005 of December 23 regulating the issuance of the Spanish national identity card and electronic signature certificates. The certificate must be obtained by the shareholder at no charge to the Company and must be valid at the time of voting.

1.3.- Votes cast at the Shareholder Office.

If Shareholders decide to cast their vote in person or by proxy at the Shareholder Information Office, they shall submit an attendance, proxy and voting card clearly stating the Shareholder's identity, number of shares held and vote on each item on the Agenda, bearing their written signature, and shall also present their national identity card or passport, if the Shareholder is a natural person. In the case of representation, the proxy must present a document accrediting proxy representation, whether the shareholder is a legal person or a natural person.

1.4.- Specific rules on the casting of votes.

If a Shareholder voting by telematic means fails to mark any of the boxes provided for the purpose in relation to any item of business on the Agenda, they will be deemed to have voted in favour of the respective resolution proposed by the Board of Directors.

2.- APPOINTMENT OF PROXIES USING TELEMATIC MEANS OF COMMUNICATION.

Pursuant to Article 27 of the Company's Articles of Association and Article 10 of the Rules and Regulations of General Shareholders' Meetings, a shareholder may appoint a proxy for a General Shareholders' Meeting by post or electronic communication in accordance with the following instructions.

In the event of any discrepancy between the Spanish version and this translation into English, the Spanish version shall prevail.

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2.1.- Appointment of proxies by post.

A shareholder wishing to appoint a proxy by post must fill in the attendance, proxy and voting card issued by entities that are Member Entities of Sociedad de Gestión de los Sistemas de Registro, Compensación y Liquidación de Valores (IBERCLEAR, the Spanish Central Securities Depository), in the "Appointment of Proxy" section, with their handwritten signature, attaching a copy of their national identity card or passport, and send it to the registered office of the Company (Enagás, S.A. - Shareholder Information Office - Paseo de los Olmos 19, 28005 Madrid) in a sealed envelope.

2.2.- Appointment of proxies by electronic communication

Shareholders wishing to appoint a proxy electronically may do so through the "Investor relations" section of the website (www.enagas.es), following the instructions given to this end on the website and filling out the forms provided. To do this, they will provide proof of identity via a legally recognised electronic signature endorsed by the guarantees stipulated below, stating the number of shares owned and the proxy appointed.

Pursuant to Article 27 of the Company's Articles of Association and Article 10 of the Rules and Rules and Regulations of General Shareholders' Meetings, the guarantees the Board of Directors considers appropriate to ensure the identification of a Shareholder exercising the right to appoint proxies is the electronic signature based on a qualified certificate under the terms provided for in the applicable regulations, provided the signature is based on (i) an Electronic User Certificate issued by the Spanish National Mint's Public Certification Authority (CERES) concerning which no revocation has been recorded, or (ii) the qualified electronic certificate included in the Spanish national identity card issued pursuant to Royal Decree 1553/2005 of December 23 regulating the issuance of national identity cards and electronic signature certificates. The certificate will be obtained by the shareholder at no charge to the Company, and must be valid at the time of appointment of the proxy.

2.3.-General provisions for appointment of proxies by telematic means of communication.

Shareholders appointing a proxy by telematic means must notify the designated proxy of the power of representation that has been granted. For this purpose, on the date and at the time of the General Shareholders' Meeting, proxies must identify themselves by their national identity card or passport and produce a printed copy of the postal or electronic delegation, duly signed by both the proxy and by the principal.

If the Chairperson or any other member of the Board of Directors is appointed as a proxy, including the Secretary or, where applicable, the Vice-Secretary, even if he/she is not a Director, this notice will be deemed to have been given upon receipt by the Company of the proxy letter.

No Shareholder may be represented by more than one proxy.

3.- GENERALLY APPLICABLE RULES.

3.1.- Time frame for voting and appointing proxies by telematic means of communication.

For proxy appointments and votes cast by any of the aforesaid means to be valid, they must be received at the Company's registered office (Enagás S.A. −Shareholder Information Office− Paseo de los Olmos, 19, Madrid) or via the Company's website,

In the event of any discrepancy between the Spanish version and this translation into English, the Spanish version shall prevail.

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www.enagas.es, as applicable, between the date of publication of Notice of the General Shareholders' Meeting and no later than 24 hours prior to the date and time of the scheduled second call for the General Shareholders' Meeting, i.e., no later than March 29, 2023 at 12.00 pm. For the purposes of electronic communication the Company will deploy an electronic time-stamping system based on an objective time source, in order to accredit the time at which proxy appointments or electronic votes arrive.

After this time, only proxy appointments in writing presented at the shareholder registration desks on the date and time specified for the General Shareholders' Meeting will be admitted.

3.2.-Order of priority in attendance, voting and proxy appointment by remote communication.

3.2.1. Priority of personal or remote attendance.

Pursuant to Article 27 of the Company's Articles of Association and Articles 10 and

11.5 (B) of the Rules and Regulations of General Shareholders' Meetings, personal, physical or telematic attendance at a General Shareholders' Meeting revokes proxy appointments and votes cast by remote means of communication.

3.2.2. Priority of remote voting over proxy appointment.

Votes cast by any telematic means of communication render any proxy appointment granted electronically or by post or by any other means void. The proxy appointment will be deemed to have been revoked if made previously, and not to have been made at all if made subsequently.

3.2.3. Priority in events of several proxy appointments and/or votes by means of remote communication.

If a Shareholder validly makes more than one proxy appointment or validly casts more than one vote by different forms of remote communication, the proxy appointment and/or vote received last prevails, and those received earlier are void.

3.3.- Confirmation of remote vote or proxy appointments.

The validity of the vote cast and of the proxy granted by remote means of communication is subject to the verification of the data provided by the shareholder with the file provided by IBERCLEAR containing the shareholders registered in the corresponding accounting register five days prior to the date scheduled for the Meeting.

3.4.- Co-ownership.

In the event of co-ownership of shares, for the purposes of Article 126 of the Corporate Enterprises Act a co-owner voting or appointing a proxy remotely is presumed to have been appointed by the other co-owners to exercise the rights arising from the shares.

3.5.- Custody of electronic signatures.

The custody of electronic signatures for voting or appointing proxies by electronic means is the sole responsibility of Shareholders.

3.6.- Legal persons and non-residents.

In the event of any discrepancy between the Spanish version and this translation into English, the Spanish version shall prevail.

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Shareholders that are legal persons corporate or are not resident in Spain must contact the Shareholder Information Office regarding possible use or adaptation of the mechanisms for voting and appointing proxies via remote communication to their specific requirements.

Furthermore, if the Shareholder is a legal person it must notify the Company, via the Secretary to the Board of Directors (Paseo de los Olmos, 19, 28005 Madrid), of any modification or revocation of the powers vested in the proxy. The Company rejects any liability that may arise prior to such notice. The Company reserves the right to modify, suspend, cancel or restrict the mechanisms for electronic voting and appointment of proxies where technical or security reasons so require or demand. Any such circumstance will be made public as soon as practicable by any medium the Company deems appropriate.

The Company accepts no liability for any damages to any shareholder as a result of breakdowns, overloads, line failures, connection faults, postal service malfunctioning or any other eventuality of the same or a similar nature beyond the control of the Company that prevents the use of remote voting and proxy appointment mechanisms.

4. ATTENDANCE, REPRESENTATION AND VOTING IN THE EVENT OF REMOTE ATTENDANCE

Pursuant to Article 27 of the Articles of Association and Articles 9 and 11 of the General Shareholders' Meeting Regulations, shareholders with the right to attend may also attend the General Shareholders' Meeting by remote means and vote in real time by using the telematic means set forth below. In such cases, shareholders with the right to vote may exercise such right themselves or by proxy.

Identification and prior registration:in order to ensure the identity of those attending, shareholders or representatives wishing to use the remote attendance mechanisms must first register through the electronic voting and delegation and remote attendance application (hereinafter the "Application"),accessible through the website (www.enagas.es) in the General Meeting of Shareholders section of the "Shareholders and Investors" tab, from the date of publication of the notice of general meeting and no later than twenty-fourhours prior to the date and time scheduled for the holding of the General Meeting (i.e. at 12:00 noon on March 28, 2023 if the General Meeting is held on first call and at 12:00 noon on March 29, 2023 if, as expected, the General Meeting is held on second call).After that time, no prior registration will be accepted for the exercise of the right to remote attendance. All shareholders or proxies wishing to attend the General Shareholders' Meeting remotely are advised to complete the pre- registration process sufficiently in advance in order to be able to correctly process the documentation accrediting the identity and legitimacy of the shareholders or their proxies.

The guarantees the Board of Directors considers appropriate to ensure the identification of a Shareholder and/or proxy exercising the right to attend through telematic means is the electronic signature based on a qualified certificate under the terms provided for in the applicable regulations, provided the signature is based on

1. an Electronic User Certificate issued by the Spanish National Mint's Public Certification Authority (CERES) concerning which no revocation has been recorded, or (ii) the qualified electronic certificate included in the Spanish national identity card issued pursuant to Royal Decree 1553/2005 of December 23 regulating the issuance

In the event of any discrepancy between the Spanish version and this translation into English, the Spanish version shall prevail.

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