Astaldi S p A : SUPPLEMENT TO NOTICE OF CALL OF GENERAL MEETING

ASTALDI Società per Azioni

Company subject to direction and coordination of Webuild S.p.A.

Registered Offices: Via Giulio Vincenzo Bona 65, Rome

Approved share capital equal to EUR 374,383,359.00

Subscribed and paid-in share capital of EUR 340,431,460.27

Entered in the Companies Register of Rome under TIN: 00398970582

Economic and Administrative Index (REA) no. 152353 - VAT no. 00880281001

SUPPLEMENT TO NOTICE OF CALL OF GENERAL MEETING

Reference is made to the Shareholders' Meeting of Astaldi S.p.A., the ordinary session of which was called in the notice published on 20 March 2021, for 9.00 a.m on 29 April 2021 at the company's offices at Via Giulio Vincenzo Bona 65, Rome, in single call ("General Meeting").

In this regard, it is made known that the Board of Directors, in its meeting on 20 March 2021, resolved to supplement the list of items which the General Meeting must examine, providing for the inclusion of the following item in an extraordinary session:

AGENDA

Extraordinary General Meeting

1) Proposal to adopt instrumental and preliminary instruments for performance of the partial and proportional spin-off of Astaldi S.p.A. in favour of Webuild S.p.A. and, specifically:

• a) approval of the partial and proportional spin-off of Astaldi S.p.A. in favour of Webuild S.p.A. and approval of the spin-off project and related documentation. Resolutions pertaining thereto and resulting therefrom;

• b) revocation, with effectiveness of the resolutions passed on 31 July 2020 subject to performance of the spin-off: (i) of the issue of a maximum of 80,738,448 Astaldi ordinary shares (bonus shares) without any indication of par value, to be used exclusively and irrevocably for the warrants assigned to Webuild S.p.A.; (ii) of the share capital increase for consideration, in a single or several tranches, with exclusion of the right of option as per article 2441, subsections 5 and 6, of the Italian Civil Code, for a total maximum amount up to EUR 98,653,846, inclusive of premium, through issue of a maximum of 428,929,765 shares without any indication of par value, at a unit price of EUR 0.23, to be reserved for subscription (i) by the Confirmed Unsecured Creditors and (ii) Potential Unsecured Creditors of Astaldi S.p.A., to be assigned to the same in payment of their claims in the measure of 12,493 new shares per EUR 100 of unsecured credit owed by Astaldi S.p.A, for the share still to be satisfied; (iii) of the share capital increase for consideration, in a single or several tranches, with exclusion of the right of option as per article 2441, subsections 5 and 6, of the Italian Civil Code, for a total maximum amount up to EUR 10,000,000, inclusive of premium, through issue of a maximum of 43,478,261 shares without any indication of par value, at a unit price of EUR 0.23, to be reserved for subscription by the Unforeseen Unsecured Creditors of Astaldi S.p.A., to be assigned to the them in payment of their claims in the measure of 12,493 new shares per EUR 100 of unsecured credit owned by Astaldi S.p.A.; (iv) of the share capital increase for consideration, in a single or several tranches, with exclusion of the right of option as per article 2441, subsections 5 and 6, of the Italian Civil Code, for a total maximum amount up to EUR 18,219,168, inclusive of premium, through issue of a maximum of 79,213,774 shares without any indication of par value, at a unit price of EUR 0.23, to be exclusively and irrevocably reserved for the warrants assigned to Astaldi Lending Banks;

• c) cancellation of warrants issued by virtue of the resolution passed by the Shareholders' Meeting on 31 July 2020, with effectiveness subject to performance of the spin-off;

• d) share capital increase for consideration, in a single tranche, with exclusion of the right of option as per 1

article 2441, subsection 5, of the Italian Civil Code, for a total amount of EUR 1,000,000.00, with effectiveness subject to performance of the spin-off, to be reserved for subscription by the "Fondazione Creditori" being set up and to be made available in cash;

e)

approval of a new text of the Company Bylaws, with effectiveness subject to performance of the spin-off. Resolutions pertaining thereto and resulting therefrom.

Therefore, the General Meeting is called upon to discuss and resolve, in an ordinary and extraordinary session, upon the following

AGENDA

Ordinary General Meeting

• 1) Annual Financial Statements of Astaldi S.p.A. at 31 December 2020. Directors' Report for FY 2020. Report of Board of Statutory Auditors and Independent Auditors. Presentation of Consolidated Financial Statements at 31 December 2020 and consolidated statement containing non-financial information pursuant to Italian Legislative Decree no. 254 of 30 December 2016 related to FY 2020. Report on Corporate Governance and ownership structure pursuant to art. 123-bis of Italian Legislative Decree no. 58/98. Resolutions pertaining thereto and resulting therefrom.

• 2) Appointment of Board of Statutory Directors. Establishment of fees to be paid to members of the Board of Statutory Auditors.

  • 2.1 Appointment of the members of the Statutory Auditors as per art. 25 of the Company Bylaws.

  • 2.2 Establishment of fees to be paid to members of the Board of Statutory Auditors.

• 3) Proposal to confirm taking office of two directors, co-opted pursuant to article 2386 of the Italian Civil Code; resolutions pertaining thereto and resulting therefrom.

• 4) Report on the remuneration policy and on fees paid, as per art. 123-ter of Italian Legislative Decree no. 58 of 24 February 1998:

  • 4.1 resolutions pertaining to the Company's remuneration policy as per the first section of the report pursuant to art. 123-ter, subsections 3-bis and 3-ter, of Italian Legislative Decree no. 58 of 24 February 1998;

  • 4.2 resolutions as per the second section of the report pursuant to art. 123-ter, subsection 6, of Italian Legislative Decree no. 58 of 24 February 1998.

Extraordinary General Meeting

2) Proposal to adopt instrumental and preliminary instruments for performance of the partial and proportional spin-off of Astaldi S.p.A. in favour of Webuild S.p.A. and, specifically:

• a) approval of the partial and proportional spin-off of Astaldi S.p.A. in favour of Webuild S.p.A. and approval of the spin-off project and related documentation. Resolutions pertaining thereto and resulting therefrom;

• b) revocation, with effectiveness of the resolutions passed on 31 July 2020 subject to performance of the spin-off: (i) of the issue of a maximum of 80,738,448 Astaldi ordinary shares (bonus shares) without any indication of par value, to be used exclusively and irrevocably for the warrants assigned to Webuild S.p.A.; (ii) of the share capital increase for consideration, in a single or several tranches, with exclusion of the right of option as per article 2441, subsections 5 and 6, of the Italian Civil Code, for a total maximum amount up to EUR 98,653,846, inclusive of premium, through issue of a maximum of 428,929,765 shares without any indication of par value, at a unit price of EUR 0.23, to be reserved for

subscription (i) by the Confirmed Unsecured Creditors and (ii) Potential Unsecured Creditors of Astaldi S.p.A., to be assigned to the same in payment of their claims in the measure of 12,493 new shares per EUR 100 of unsecured credit owed by Astaldi S.p.A, for the share still to be satisfied; (iii) of the share capital increase for consideration, in a single or several tranches, with exclusion of the right of option as per article 2441, subsections 5 and 6, of the Italian Civil Code, for a total maximum amount up to EUR 10,000,000, inclusive of premium, through issue of a maximum of 43,478,261 shares without any indication of par value, at a unit price of EUR 0.23, to be reserved for subscription by the Unforeseen Unsecured Creditors of Astaldi S.p.A., to be assigned to the them in payment of their claims in the measure of 12,493 new shares per EUR 100 of unsecured credit owned by Astaldi S.p.A.; (iv) of the share capital increase for consideration, in a single or several tranches, with exclusion of the right of option as per article 2441, subsections 5 and 6, of the Italian Civil Code, for a total maximum amount up to EUR 18,219,168, inclusive of premium, through issue of a maximum of 79,213,774 shares without any indication of par value, at a unit price of EUR 0.23, to be exclusively and irrevocably reserved for the warrants assigned to Astaldi Lending Banks;

• c) cancellation of warrants issued by virtue of the resolution passed by the Shareholders' Meeting on 31 July 2020, with effectiveness subject to performance of the spin-off;

• d) share capital increase for consideration, in a single tranche, with exclusion of the right of option as per article 2441, subsection 5, of the Italian Civil Code, for a total amount of EUR 1,000,000.00, with effectiveness subject to performance of the spin-off, to be reserved for subscription by the "Fondazione Creditori" being set up and to be made available in cash;

• e) approval of a new text of the Company Bylaws, with effectiveness subject to performance of the spin-off. Resolutions pertaining thereto and resulting therefrom.

***

Please find below all the information found in the notice of call of the General Meeting published on 20 March 2021 onwww.astaldi.com, ("Governance"/"Shareholders' Meeting" section), with specification that there are changes solely in the sections "Supplementation of agenda" and "Right to individually submit resolution proposals prior to the General Meeting", with specific reference to the deadline listed therein.

***

For the purposes of this notification:

"Astaldi Lending Banks" is used to refer to: Unicredit S.p.A., Intesa Sanpaolo S.p.A., SACE S.p.A., BNP Paribas S.A., Banca Monte dei Paschi di Siena S.p.A. and Banco BPM S.p.A.

"Confirmed Unsecured Creditors" is used to refer to the unsecured creditors of Astaldi S.p.A. for right or reason prior to publication of Astaldi S.p.A.'s application for pre-composition occurred on 1 October 2018, as resulting from the list of payables filed with the Proposal and supplements made by the Judicial Commissioners following the verifications delegated to them as per art. 171 of the Italian Insolvency Law.

"Potential Unsecured Creditors" is used to refer to Unsecured Creditors whose claims were not included (in full or in part) among the payables listed among composition liabilities subsequent to the conclusion of checks referred to the Judicial Commissioners as per article 171 of the Italian Insolvency Law, but were instead fully included among the provisions for risks listed among composition liabilities as corrected by the Judicial Commissioners.

"Unforeseen Unsecured Creditors" is used to refer to: (i) Unsecured Creditors whose claims were not even partially included among the payables and provisions for risks listed among composition liabilities subsequent to the conclusion of checks referred to the Judicial Commissioners as per article 171 of the Italian Insolvency Law; and (ii) Potential Unsecured Creditors for the portion not satisfied within the scope of the capital increase, reserved to them in the form of conversion resolved upon by the Shareholders' Meeting of 31 July 2020.

Information related to the Covid-19 Health Emergency - Procedure for holding General Meeting

In order to reduce to a minimum the risks related to spreading of the Covid-19 public health emergency, the Company has decided to avail itself of the faculty established under Article 106, subsection 4, of Italian Law Decree No. 18/2020, converted with amendments into Law dated 24 April 2020, the application of which was last extended under Law Decree No. 183 of 31 December 2020, converted with amendments into Law no. 21 of 26 February 2021 (the "Decree"). Therefore, this provides for shareholders to take part in the Shareholders' Meeting solely via the appointed representative pursuant to Article 135-undecies of Italian Legislative Decree no. 58 of 24 February 1998, as subsequently amended and supplemented (the "Consolidated Finance Act") without the physical attendance of shareholders, using the methods listed below.

Without prejudice to the above regarding the possibility for parties with voting rights to take part exclusively through the Appointed Representative, the Company Directors, Statutory Auditors, meeting secretary, if any, Notary Public, Appointed Representative and any other parties requested to attend the General Meeting may also take part in the latter using means of telecommunication that allow for identification without it be necessary, in any case, for the Chairman, Secretary and Notary Public to be in the same location.

It must be noted that the information contained herein - and specifically, the date, venue and/or time of the General Meeting, terms for the exercise of rights by Shareholders, procedures for participation in the meeting and/or procedures for holding of the meeting itself - may undergo changes, updates or specification in view of the current emergency situation linked to COVID-19 and consequent measures adopted by the relevant authorities as the situation evolves, as well as for the purpose of ensuring strict compliance with the basic principles of protecting the health and safety of company shareholders, employees, representatives and consultants.

Any changes, updates or specifications regarding information listed herein will be promptly supplied through the Company's website and using the other procedures provided for by law.

The appointed representative as per 135-undecies of the Consolidated Finance Act is Computershare S.p.A., with offices in Rome, Via Monte Giberto, 33 00138 (the "Appointed Representative").

Share capital information

The subscribed and paid-in share capital of Astaldi S.p.A. amounts to EUR 340,431,460.27 represented by 1,480,136,785 ordinary shares without any indication of par value. The Company does not hold treasury shares. Each share gives the right to one vote. However, pursuant to article 127-quinquies of the Consolidated Finance Act, two votes are assigned to each share belonging to the same shareholder for an uninterrupted period of no fewer than twenty-four months as from the date of entry in the list ("List") set up for this purpose, kept and updated by the Company, as provided for in the Company Bylaws (so-called "increased voting right"). The Shareholder must show the Company the statement provided for in article 23-bis of the Regulation jointly approved by Banca d'Italia and CONSOB on 24 February 2015, as subsequently amended, certifying the duration of uninterrupted ownership of the shares subject to increased voting rights, in order to exercise said "increased voting right". The Company has also approved rules for detailed regulation of the procedures for registering, keeping and updating the List. These rules are published onwww.astaldi.comin the section entitled "Governance/Increased Votes". Moreover, pursuant to legislation, voting rights will be suspended for treasury shares held by the Company, the amount of which will be announced at the start of the general meeting. The information contained herein is also available onwww.astaldi.com.

Legitimisation of right to take part in General Meeting and to exercise voting rights

Pursuant to article 83-sexies of the Consolidated Finance Act, the parties entitled to take part in and vote at the General Meeting, exclusively through the Appointed Representative, are those for whom notification, to be requested by the entitled party, has been sent to the Company by the appointed intermediary certifying holding of the rights in question based on account entries as per the end of the seventh day of market trading prior to the date of the General Meeting, in other words the 20 April 2021 (so-called record date). Credit or debit