Webuild

Report Publication Announcement • Apr 16, 2025

PRESS RELEASE

CHANGES TO THE 2025 CORPORATE EVENTS CALENDAR

Milan, April 16, 2025 - Pursuant to article 2.6.2 of Borsa Italiana's Regulation for Equity Market, Webuild announces that the Board of Directors' meeting to approve the voluntary periodic information on new orders and business performance as of March 31, 2025, will be held on May 14, 2025, instead of May 15, 2025 (as instead communicated on January 29, 2025).

DATE EVENT Thursday, March 13, 2025 Meeting of the Board of Directors for the approval of the Draft Statutory Statements and the Consolidated Financial Statements as at December 31, 2024 Wednesday, April 16, 2025 (single call) Shareholders' Meeting to approve the Financial Statements as at December 31, 2024 Wednesday, May 14, 2025 Meeting of the Board of Directors to approve the voluntary periodic information on new orders and business performance as at March 31, 2025 Thursday, July 24, 2025 Meeting of the Board of Directors to approve the Half-Year Consolidated Financial Statements as of June 30, 2025 Thursday, November 13, 2025 Meeting of the Board of Directors to approve the voluntary periodic information on new orders and business performance as at September 30, 2025

Hereinafter, the 2025 corporate events calendar with the abovementioned change.

Any changes to the above dates and information related to the conference calls with the financial community, during which the Group's accounts will be presented, will be duly communicated. The calendar of corporate events is available on the company website at , under "Governance/Corporate events," as well as at the authorized storage system , http://.

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Webuild is a global leader in the design and construction of large, complex infrastructure projects in sustainable mobility, hydropower, water treatment, and green buildings. A recognized leader in the water sector, it works in approximately 50 countries with over 92,000 people of 125 different nationalities. The Group boasts nearly 120 years of applied engineering on more than 3,700 completed projects, with a track record of 13,648 kilometres of railways, 891 kilometres of metro lines, 82,577 kilometres of roads and highways, 1,022 kilometres of bridges and viaducts, 3,462 kilometres of tunnels, and 318 dams and hydropower plants. Among its most famous projects: the expansion of the Panama Canal, the Long Beach International Gateway bridge in California, the Third Bosphorus Bridge in Turkey, the Sydney Metro Northwest skytrain viaduct and bridge, the Kingdom Centre skyscraper in Riyadh, Saudi Arabia, and numerous metro lines in Copenhagen, Paris, Rome, Milan, Naples, Doha, Thessaloniki, and Riyadh. Among the main ongoing projects, the following stand out: the New Genoa Breakwater, the Brenner Base Tunnel, the Pedemontana Lombarda Highway, Line C of Rome's metro network, the high-capacity railways between Genoa and Milan, the high-speed railway between Naples and Bari, the Palermo-Catania-Messina highcapacity railway, the Snowy 2.0 hydropower scheme in Australia, and the Trojena dam network in Saudi Arabia. As of December 31, 2024, the Webuild Group registered total revenues for €12 billion and a total backlog of €63 billion, with more than 90% of its construction backlog related to projects linked to the United Nations Sustainable Development Goals (SDGs). Webuild, subject to the direction and coordination of Salini Costruttori S.p.A., is headquartered in Italy, is listed on the Milan Stock Exchange, Borsa Italiana (WBD; WBD.MI; WBD:IM), and since 2021, it is included in the MIB ESG index of the Italian blue-chip companies with the best ESG practices.

More information at www.webuildgroup.com

Contacts: Media Relations Investor Relations Francesca Romana Chiarano Amarilda Karaj Tel. +39 338 247 4827 Tel +39 02 444 22476 mail: f.chiarano@webuildgroup.com email: a.karaj@webuildgroup.com