Webuild

Declaration of Voting Results & Voting Rights Announcements • Jul 4, 2025

NOTICE PURSUANT TO ARTICLE 143-QUATER, PARAGRAPH 5, OF CONSOB REGULATION NO. 11971/99

Milan – July 4, 2025 - Following the registration in the increased voting register of n. 10 million Webuild shares held by the shareholder Salini S.p.A. (as per the internal dealing press release of June 16, 2025), below is the list of shareholders of Webuild S.p.A. holding a stake greater than 3% of the total number of voting rights who have requested and obtained registration in the list for the achievement of the increased voting right.

CONTROLLING ENTITY	SHAREHOLDERS	REGISTRATION DATE	REGISTERED SHARES	% OF ORDINARY SHARE CAPITAL	DATE OF ACHIEVEMENT	TOTAL VOTING RIGHTS	% OF VOTING RIGHTS
Pietro Salini	Salini S.p.A.	22/04/2022	361,685,772	35.54%	21/04/2024	723,371,544	46.03%
		05/09/2022	175,877	0.02%	04/09/2024	351,754	0.02%
		06/02/2024	1,672,727	0.16%	-	1,672,727	0.11%
		28/04/2025	25,000,000	2.46%	-	25,000,000	1.59%
		24/06/2025	10,000,000	0.98%	-	10,000,000	0.64%
	Total Salini S.p.A.		398,534,376	39.16%		760,396,025	48.39%
	Athena Partecipazioni S.r.l.	19/05/2024	1,069,524	0.11%	18/05/2024	2,139,048	0.14%
		05/09/2024	631	0.0001%	04/09/2024	1,262	0.0001%
		03/02/2024	6,001	0.0006%	-	6,001	0.0004%
	Total Athena		1,076,156	0.11%		2,146,311	0.14%
	Pietro Salini	23/05/2022	545,053	0.05%	22/05/2024	1,090,106	0.07%
		07/09/2022	238	0.00002%	06/09/2024	476	0.00003%
		06/02/2024	2,270	0.0002%	-	2,270	0.0001%
	Total Pietro Salini		547,561	0.05%	-	1,092,852	0.07%
	TOTAL		400,158,093	39.33%		763,635,188	48.59%
Cassa Depositi e Prestiti S.p.A.	CDP Equity S.p.A.	29/04/2022	166,666,666	16.38%	28/04/2024	333,333,332	21.22%
		01/09/2022	193,931	0.02%	31/08/2024	387,862	0.02%
		01/02/2024	694,548	0.07%	-	694,548	0.04%
	TOTAL	-	167,555,145	16.47%	-	334,415,742	21.28%

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.

Contacts: Media Relations Investor Relations Francesca Romana Chiarano Amarilda Karaj Tel. +39 338 247 4827 Tel +39 06 6776 26975 email: f.chiarano@webuildgroup.com email: a.karaj@webuildgroup.com