Webuild

Regulatory Filings • Jan 14, 2026

{0}------------------------------------------------

PRESS RELEASE

WEBUILD: METRO C CONSORTIUM AWARDED €776 MILLION CONTRACT TO BUILD T1 SECTION OF ROME'S METRO LINE C

FROM ROME TO RIYADH AND NAPLES: WEBUILD SIGNS THIRD MAJOR METRO PROJECT IN JUST A FEW DAYS FOR SUSTAINABLE URBAN MOBILITY

• T1 section will connect Clodio/Mazzini to Farnesina stations in northern quadrant of city, strengthening public transport services
• Consortium has delivered 24 stations, including "archaeo-stations" Porta Metronia and Colosseo/Fori Imperiali in December, and is currently working on Venezia station and section T2

MILAN, January 14, 2026 – Webuild announces a new project that confirms its global leadership in metro systems and sustainable mobility: the awarding of section T1 of Rome Metro's Line C. It comes just days after the Group received contracts for the extension of Riyadh Metro's Red Line and Line 10 in Naples. Leading the Metro C Consortium with Vianini Lavori, it will build the strategic link between the Clodio/Mazzini and Farnesina stations in the northern quadrant of the Italian capital. Of the total value of the contract at €776 million, €268 million of it will be Webuild's share.

The assigning of the contract follows the public opening in December of Line C's Colosseo/Fori Imperiali and Porta Metronia stations. The two so-called archaeo-stations, which add 3 kilometres to the line and an interchange with Line B, are the latest examples of how the Consortium was able to overcome major engineering challenges to safeguarding the city's heritage. In fact, the construction sites were an opportunity for cultural enhancement, with more than 625,000 cubic metres of archaeological excavations managed along the stretch of Line C from Monte Compatri/Pantano in the east to Clodio/Mazzini.

The ability to combine advanced engineering with measures to preserve millennia-old artifacts is the hallmark of Webuild and the Metro C consortium's work in Rome. Section T1, for which the Consortium will handle both design and construction, will be built in an integrated manner with section T2. The latter, currently in the phase of executive design, includes the first crossing under the Tiber River.

The awarding of the T1 section to the consortium will facilitate the continuation of mechanised excavation from Farnesina to Piazza Venezia, avoiding a fragmentation of the works. Meanwhile, work at the Venezia station is progressing as part of the second macro phase of its construction.

Line C will eventually extend for 29 kilometres with 31 stations, from the eastern terminus at Monte Compatri/Pantano to Farnesina. To date, 24 stations have been completed from the eastern terminus to Colosseo/Fori Imperiali in the historic centre.

The work on the line strengthens the Group's global track record in the sector, with more than 890 kilometres of metro lines built. The Group is leading projects such as Line 15 and 16 of the Grand Paris Express in France, Lines 2 and 4 in Lima, Peru, and Sydney Metro in Australia. In Italy, after completing Milan's M4, Webuild is working in Naples on the finalisation of the Capodichino station, confirming its

{1}------------------------------------------------

global role in driving the transition toward increasingly sustainable and technologically advanced urban mobility.

***

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 highspeed/high-capacity railways, the PalermoCatania-Messina high-capacity railway, the Snowy 2.0 hydropower scheme in Australia and the Dams System in Trojena in the Kingdom of Saudi Arabia. As of December 31, 2024, revenues totalled €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:

Francesca Romana Chiarano Amarilda Karaj Senior Manager – Media Relations Investor Relations Tel. +39 338 247 4827 Tel +39 02 444 22476

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