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Webuild

Declaration of Voting Results & Voting Rights Announcements Oct 7, 2025

4062_rns_2025-10-07_ff26868e-0220-49e5-a4e2-0cdfd0222a33.pdf

Declaration of Voting Results & Voting Rights Announcements

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

Milan – October 7, 2025 - Following the Press Release issued today on the change in share capital and the total amount of voting rights, please be advised that, given the small number of newly issued shares (n. 28,545 shares) and of shares cancelled from the increased vote (n. 604,886), and also taking into account the rounding made to the second decimal place, there have been no significant changes in the voting rights of Webuild S.p.A. shareholders holding more than 3% of the total voting rights and registered in the Register for increased voting rights compared to the previous Press Release of September 5, 2025. The table below reflects the above-mentioned changes.

CONTROLLING ENTITY SHAREHOLDERS REGISTRATION DATE REGISTERED SHARES % OF ORDINARY
SHARE CAPITAL
DATE OF
ACHIEVEMENT
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 46.05%
05/09/2022 175,877 0.02% 04/09/2024 351,754 0.02%
06/02/2024 665,286 0.06% - 665,286 0.04%
28/04/2025 25,000,000 2.46% - 25,000,000 1.59%
24/06/2025 4,824,652 0.47% - 4,824,652 0.31%
Totale Salini S.p.A. 392,351,587 38.55% 754,213,236 48.01%
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%
Totale 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%
25/08/2025 1,007,441 0.10% - 1,007,441 0.06%
Totale Pietro Salini 1,555,002 0.15% - 2,100,293 0.13%
TOTAL 394,982,745 38.81% 758,459,840 48.28%
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 construction of large, complex infrastructure projects, with a focus on sustainable mobility, hydropower, water treatment, and green buildings. A recognized leader in the water sector and active in about 50 countries, the Group employs approximately 95,000 people of over 125 nationalities. It boasts nearly 120 years of experience with over 3,700 completed projects. Its track record includes 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 319 dams and hydropower plants. Among its most iconic projects are the Grand Ethiopian Renaissance Dam in Ethiopia, the expansion of the Panama Canal, the Long Beach International Gateway bridge in California (USA), the Second Bosphorus Bridge (Turkey), the Sydney Metro Northwest skytrain viaduct and bridge (Australia), the Kingdom Centre skyscraper in Riyadh (Saudi Arabia), and metro lines in cities such as Copenhagen, Paris, Rome, Milan, Naples, Doha, Thessaloniki, and Riyadh. Ongoing projects include the New Genoa Breakwater, the Brenner Base Tunnel, the Pedemontana Lombarda Highway, Metro di Roma's Line C, the Genoa-Milan and Naples-Bari high-speed/high-capacity railways, the Palermo-Catania-Messina high-capacity railway, the Snowy 2.0 hydropower scheme in Australian and the Dams System in Trojena in the Kingdom of Saudi Arabia. As of December 31, 2024, the Group registered total revenues for €12 billion. As of June 30, 2025, its total order backlog stands at approximately €59 billion, with over 90% of its construction backlog related to projects linked to the United Nations Sustainable Development Goals (SDGs). Listed on the Borsa Italiana stock exchange in Milan (WBD; WBD.MI; WBD:IM), it is member of the MIB ESG index of Italian companies with best ESG practices. Headquartered in Italy, it is subject to the management and coordination of Salini Costruttori S.p.A.

More information at www.webuildgroup.com

Contacts: Media Relations Investor Relations Francesca Romana Chiarano Amarilda Karaj Tel. +39 338 247 4827 Tel +39 06 6776 26975

email: [email protected] email: [email protected]

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