MILAN, January 9, 2026 – Webuild S.p.A. informs that, as of today, an updated version of the Essential Information of the "Shareholders' Agreements concerning Webuild S.p.A. Ordinary Shares" (Pattuizioni parasociali relative ad azioni ordinarie Webuild S.p.A.), signed on February 29, 2024, between Salini S.p.A. and CDP Equity S.p.A., has been made available to the public on the Company's website (www.webuildgroup.com) in the "Governance/Other Documents" section, at the registered office, and via the authorised storage mechanism 1Info (www.1info.it).

This update, as required by Art. 131, Paragraph 3, of Consob Regulation no. 11971/1999 (“Issuers' Regulation”), reflects the changes that occurred during 2025—which were already communicated to the market—concerning the amount of shareholdings subject to the Agreement held by the said shareholders, and the relative voting rights.