Webuild

Transaction in Own Shares • Nov 17, 2025

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PRESS RELEASE

WEEKLY COMMUNICATION REGARDING SHARE BUY-BACK PROGRAMME PURCHASED No. 30,000 SHARES (EQUAL TO 0.003% OF THE ORDINARY SHARE CAPITAL) OVERALL EQUIVALENT: €98 THOUSANDS

Milan, November 17, 2025 – Webuild informs that it has purchased, in the period November 10-14, 2025 included, no. 30,000 ordinary treasury shares (equal to 0.003% of the ordinary share capital and 0.32% of the total volume of the exchanged shares in the aforementioned period) for an overall countervalue of €98,267.34.

In light of the above, the total amount of ordinary treasury shares held by the company as of November 14, 2025, amounts to 28,103,437 ordinary treasury shares, the equivalent of 2.762% of the ordinary share capital.

Below, attached, the details of the purchases made (through the intermediary Intermonte S.p.A.) and the operations carried out in the aforementioned period, in detail.

DATE	No. SHARES	AVERAGE UNIT PRICE	COUNTERVALUE
	PURCHASED	(Euro)	(Euro)
14/11/2025	30,000	3.2756	98,267.34

***

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 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, the Second Bosphorus Bridge in Turkey, the Sydney Metro Northwest skytrain viaduct and bridge, the Kingdom Centre skyscraper in Riyadh, 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 Australia and the Dams System in Trojena in Saudi Arabia. As of December 31, 2024, the Group registered total revenues of €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. 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

email: f.chiarano@webuildgroup.com email: a.karaj@webuildgroup.com

Tel. +39 338 247 4827 Tel +39 06 6776 26975

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	OPERATIONS IN DETAIL
Date	Price (Euro)	no. shares purchased	Time
14/11/2025	3,222	249	14:22:28
14/11/2025	3,222	36	14:29:12
14/11/2025	3,222	15	14:29:31
14/11/2025	3,234	499	14:35:59
14/11/2025	3,234	497	14:36:31
14/11/2025	3,232	501	14:37:57
14/11/2025	3,23	500	14:41:08
14/11/2025	3,232	501	14:46:46
14/11/2025	3,24	499	14:50:36
14/11/2025	3,24	499	14:52:57
14/11/2025	3,242	497	14:56:42
14/11/2025	3,242	500	15:02:04
14/11/2025	3,244	500	15:07:02
14/11/2025	3,242	498	15:10:23
14/11/2025	3,24	501	15:16:12
14/11/2025	3,248	500	15:20:31
14/11/2025	3,246	498	15:25:08
14/11/2025	3,248	498	15:29:55
14/11/2025	3,246	500	15:30:06
14/11/2025	3,242	499	15:32:57
14/11/2025	3,26	17	15:37:04
14/11/2025	3,262	81	15:37:09
14/11/2025	3,262	421	15:37:09
14/11/2025	3,26	502	15:37:43
14/11/2025	3,266	500	15:39:49
14/11/2025	3,274	497	15:44:11
14/11/2025	3,278	497	15:46:15
14/11/2025	3,284	498	15:47:48
14/11/2025	3,284	499	15:50:40
14/11/2025	3,286	500	15:51:23
14/11/2025	3,288	501	15:56:23
14/11/2025	3,29	500	15:58:30
14/11/2025	3,294	114	16:01:47
14/11/2025	3,294	384	16:01:47
14/11/2025	3,292	501	16:04:02
14/11/2025	3,292	396	16:07:14
14/11/2025	3,292	498	16:11:57
14/11/2025	3,29	500	16:13:34
14/11/2025	3,288	497	16:13:58
14/11/2025	3,286	498	16:19:45
14/11/2025	3,288	499	16:22:26
14/11/2025	3,284	500	16:24:54
14/11/2025	3,288	500	16:28:50
14/11/2025	3,286	497	16:31:33
14/11/2025	3,292	497	16:37:57
14/11/2025	3,298	499	16:40:52

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14/11/2025	3,298	501	16:44:01
14/11/2025	3,298	501	16:44:59
14/11/2025	3,296	502	16:46:55
14/11/2025	3,298	498	16:50:36
14/11/2025	3,298	499	16:55:37
14/11/2025	3,298	497	16:56:44
14/11/2025	3,304	499	17:00:10
14/11/2025	3,304	497	17:02:47
14/11/2025	3,3	497	17:02:57
14/11/2025	3,296	500	17:07:01
14/11/2025	3,298	501	17:12:40
14/11/2025	3,296	499	17:13:31
14/11/2025	3,296	501	17:15:26
14/11/2025	3,296	498	17:18:14
14/11/2025	3,294	502	17:19:15
14/11/2025	3,298	498	17:22:58
14/11/2025	3,298	293	17:24:58
14/11/2025	3,298	205	17:24:58
14/11/2025	3,296	332	17:26:27
14/11/2025	3,296	498	17:28:01
14/11/2025	3,296	502	17:28:03