Webuild: Third Mega Lot of SS 106 Ionian Highway at over 76% completion. Deck for Annunziata Viaduct set to be raised

PRESS NOTE

WEBUILD: THIRD MEGA LOT OF SS 106 IONIAN HIGHWAY AT OVER 76% COMPLETION. DECK FOR ANNUNZIATA VIADUCT SET TO BE RAISED WEBUILD INVOLVED IN STRATEGIC PROJECTS FOR SOUTHERN ITALY WORTH ABOUT €15 BLN WITH NEARLY 8,700 PEOPLE

Credits: Webuild Image Library

MILAN, October 31, 2025 - A new milestone has been reached at the Third Mega Lot of the Ionian State Road (SS 106) in Calabria, a strategic infrastructure for southern Italy that is being developed by Webuild on behalf of ANAS (FS Italiane Group). The project's completion has surpassed 76 percent, and preparations for the raising of the deck for the Annunziata viaduct are complete. Meanwhile, other works are being carried out on the major project along the Calabrian section of the SS 106 that will transform it into a modern dual carriageway.

Webuild is deeply involved in infrastructure development in southern Italy. It is present in a number of regions and working on strategic projects totaling approximately €15 billion in awarded contracts. To carry out these works, Webuild employs around 8,700 people in the south, including direct and third-party personnel. It has also involved a supply chain of over 7,600 companies. The projects generate value for the region, activate local supply chains, create quality employment through investments in training and workplace safety, and improve connectivity among the southern regions.

Among the most complex and iconic works of the Third Mega Lot, the Annunziata viaduct spans over 900

metres with a single carriageway and features a distinctive two-level steel-concrete composite deck, one for each direction. In recent weeks, the Ferro viaduct reached its own milestone: standing 20 metres tall and stretching over half a kilometre, it is characterised by a mixed steel-concrete structure with 11 spans. Its construction required 2,800 tons of steel and more than 23,000 cubic metres of concrete, showcasing the engineering commitment behind the entire Mega Lot.

Construction continues in parallel on four other viaducts - Straface, Monaco, Forno, and Stellitano - as well as on the iconic Avena viaduct, the most architecturally significant overpass of the entire infrastructure, featuring distinctive V-shaped steel piers. Asphalt laying also continues between the Sibari and Trebisacce junctions along the first 18 kilometres. Once the auxiliary works being carried out by ANAS are completed, they will allow for early traffic opening ahead of the final completion. In the coming weeks, the second diaphragm of the Trebisacce Tunnel, approximately 3.3 kilometres long and twin-tubed, is scheduled to be broken through, while excavation and lining works continue on the other 10 artificial tunnels along the route.

The construction site spans 38 kilometres, currently involving around 1,200 workers and activating a supply chain of over 880 companies, with a strong local component: 45 percent of the companies are based in Calabria. Once completed, the Mega Lot will enhance connections between the Ionian coasts of Calabria, Basilicata, and Puglia, improving access to coastal towns and linking the A14 and A2 highway corridors.

In Calabria, Webuild's contribution to infrastructure modernisation goes beyond SS 106. The Group is also a key player in upgrading the high-speed/high-capacity rail line along the Salerno-Reggio Calabria axis, with strategic interventions that strengthen southern Italy's connectivity. Among these, the "Paola-Cosenza Doubling," commissioned by RFI (FS Italiane Group), stands out as one of the most significant projects: over 22 kilometres of new railway, almost entirely underground, including the construction of the new Santomarco Tunnel, which will extend for more than 15 kilometres. Along the same route, Webuild is also working on Lot 1A Battipaglia-Romagnano, located in Campania, contributing to the transformation of one of the country's main railway corridors into a sustainable, fast, and integrated system.

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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 (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 Australia 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 https://www.webuildgroup.com

‌Contacts: ‌Francesca Romana Chiarano Senior Manager - Media Relations Tel. [phone]‌‌ email: [e-mail] Francesco Squitieri Regional Communications Manager (Calabria, Campania, Puglia) Tel. [phone] email: [e-mail]