Webuild — M&A Activity 2021

Jul 30, 2021

NOT FOR PUBLICATION, RELEASE OR DISTRIBUTION, DIRECTLY OR INDIRECTLY, IN WHOLE OR IN PART, IN OR INTO THE UNITED STATES OR IN OR INTO AUSTRALIA, JAPAN, SOUTH AFRICA OR ANY OTHER JURISDICTION IN WHICH SUCH PUBLICATION, RELEASE OR DISTRIBUTION WOULD BE PROHIBITED BY APPLICABLE LAW

PRESS RELEASE

REGISTRATION OF THE DEED OF PARTIAL PROPORTIONAL SPIN-OFF OF ASTALDI INTO WEBUILD EFFECTIVE DATE OF TRANSACTION CONFIRMED AS 1 AUGUST 2021 AND FOR STOCK EXCHANGE PURPOSES 2 AUGUST 2021

Milan, 30 July 2021 - Further to the communication dated 29 July 2021, we confirm that the deed of partial proportional spin-off of Astaldi S.p.A into Webuild S.p.A has been registered at the offices of the Company Register of Milan Monza Brianza Lodi and of Rome respectively.

Hence, we confirm that the spin-off shall be effective for civil, accounting and tax purposes from 1 August 2021 and for stock exchange purposes from 2 August 2021.

Further information can be found in the press releases dated 15 March and 29 July 2021, available for consultation on the website www.webuildgroup.com, "Media - Press Releases and Notes" section.

The draft terms of the spin-off and the explanatory reports of the Boards of Directors of Webuild and Astaldi are available on the website www.webuildgroup.com, "Governance - Shareholders' Meetings - Shareholders' Meeting 30 April 2021" section. On the same website www.webuildgroup.com, Governance - Other documents - 2021" section, the informative document on the spin-off published by Webuild pursuant to Article 70(6) of CONSOB Regulation 11971/99 can also be found.

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This press release shall not be distributed, whether directly or indirectly, in the United States of America (as defined in Regulation S contained in the US Securities Act of 1933, as subsequently amended - "US Securities Act"), in Canada, Japan, or in any other country where the offer or the sale of securities would be forbidden by the law. This press release is not, and is not part of, an offer or sale of securities to the public or a solicitation to purchase or sell securities, and there will be no offer of securities or solicitation to sell or purchase securities in any jurisdiction where such offer or solicitation would be forbidden by the law. The securities mentioned in this press release have not been and will not be registered under the US Securities Act and may not be offered or sold in the United States of America without a registration or a specific exemption from registration under the US Securities Act. No offers of the securities to the public or solicitation to sell or purchase securities shall be made in the United States of America or in any other country.

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Webuild, the new group born in 2020 from Salini Impregilo, is a leading global player in the construction of large, complex projects for sustainable mobility, clean hydro energy, clean water, green buildings, supporting clients in achieving sustainable development goals (SDGs). The Group isthe expression of 115 years of engineering experience applied in 50 countries on five continents with 70,000 direct and indirect employees from more than 100 nationalities. Recognised for five years by Engineering News-Record (ENR) as the world leader in water infrastructure (such as dams, hydraulic tunnels, water and wastewater management, and water treatment and desalination plants), it ranks since 2018 among the top 10 in the environment sector and it is also leader in sustainable mobility (especially metro and rail lines, in addition to roads and bridges). A signatory of the United Nations Global Compact, the Group's expertise is displayed in projects such as the M4 metro line in Milan, Grand Paris Express, Cityringen in Copenhagen, Sydney Metro Northwest, Red LineNorthUnderground inDoha, Line 3 ofthe Riyadh Metro and the high-speed railwaysin Italy.Other projectsinclude the new Genoa Bridge and the Gerald Desmond replacement bridge in Long Beach, California, the expansion of the Panama Canal, the Snowy 2.0 hydroelectric power station in Australia, the Rogun hydroelectric dam in Tajikistan, the Anacostia River and Northeast Boundary tunnels in Washington, D.C. and the Al Bayt 2022 World Cup stadium in Qatar. In 2020, the Group's total order backlog reached €41.7 billion,with 89% ofthe backlog of construction ordersinvolving projectsthatsupportthe SDGsset by theUnitedNations. Webuild, subject to direction and coordination by Salini Costruttori SpA, is headquartered in Italy and is listed on the Milan Stock Exchange (Borsa Italiana: WBD; Reuters: WBD.MI; Bloomberg:WBD:IM).

More information at www.webuildgroup.com

Contacts: Media Relations Investor Relations Gilles Castonguay Amarilda Karaj Tel. +39 342 682 6321 Tel +39 02 444 22476 email: gr.castonguay@webuildgroup.com email: a.karaj@webuildgroup.com