Salini Impregilo S.p.A. (incorporated with limited liability under the laws of the Republic of Italy) €500,000,000 1.750 per cent. Notes due 26 October 2024 The issue price of the €500,000,000 1.750 per cent. Notes due 26 October 2024 (the “Notes”) of Salini Impregilo S.p.A. (the “Issuer” or “Salini Impregilo”) is 100 per cent. of their principal amount. Unless previously redeemed or cancelled, the Notes will be redeemed at their principal amount on 26 October 2024. The Notes are subject to redemption, in whole but not in part, at their principal amount, plus interest, if any, to the date fixed for redemption at the option of the Issuer at any time in the event of certain changes affecting taxation in the Republic of Italy. In addition, the holder of a Note may, by the exercise of the relevant option, require the Issuer to redeem such Note at 100 per cent. of its principal amount together with accrued and unpaid interest (if any) upon the occurrence of a Change of Control (as defined below). The Issuer may also elect to redeem all, but not some only, of the Notes at an amount calculated on a “make whole” basis. See Condition 7 (Redemption and Purchase). The Notes will bear interest from 26 October 2017 (the “Issue Date”) at the rate of 1.750 per cent. per annum payable annually in arrears on 26 October each year commencing on 26 October 2018. Payments on the Notes will be made in Euro without deduction for or on account of taxes imposed or levied by the Republic of Italy to the extent described under Condition 9 (Taxation). The Notes will constitute direct, general and unconditional obligations of the Issuer which will at all times rank pari passu among themselves and at least pari passu with all other present and future unsecured obligations of the Issuer, save for certain mandatory exceptions of applicable law. The prospectus (the “Prospectus”) has been approved by the Central Bank of Ireland (the “Central Bank”), as competent authority under Directive 2003/71/EC (the “Prospectus Directive”). The Central Bank only approves this Prospectus as meeting the requirements imposed under Irish and EU law pursuant to the Prospectus Directive. Such approval relates only to the Notes which are to be admitted to trading on the regulated market of the Irish Stock Exchange or other regulated markets for the purposes of Directive 2004/39/EC or which are to be offered to the public in any member state of the European Economic Area. Application has been made to the Irish Stock Exchange plc (the “Irish Stock Exchange”) for the Notes to be admitted to the Official List and trading on its regulated market. This Prospectus (together with the documents incorporated by reference herein) is available for viewing on the website of the Irish Stock Exchange (www.ise.ie). The Notes have not been, and will not be, registered under the United States Securities Act of 1933, as amended (the “Securities Act”) and are subject to United States tax law requirements. The Notes are being offered outside the United States by the Managers (as defined in “Subscription and Sale”) in accordance with Regulation S under the Securities Act (“Regulation S”), and may not be offered, sold or delivered within the United States or to, or for the account or benefit of, U.S. persons except pursuant to an exemption from, or in a transaction not subject to, the registration requirements of the Securities Act. For a description of certain restrictions on transfers of the Notes, see “Subscription and Sale”. Investing in the Notes involves risks. See “Risk Factors” beginning on page 1 of this Prospectus for a discussion of certain risks prospective investors should consider in connection with any investment in the Notes. The Notes will be in bearer form in the denomination of €100,000 each and, for so long as the Notes are represented by a Global Note (as defined below) and Euroclear Bank SA/NV (“Euroclear”) and Clearstream Banking, S.A. (“Clearstream, Luxembourg”) (or other relevant clearing system) allow, in denominations of €1,000 in excess of €100,000, up to and including €199,000. The Notes will initially be in the form of a temporary global note (the “Temporary Global Note”), without interest coupons, which will be deposited on or around the Issue Date with a common safekeeper for Euroclear and Clearstream, Luxembourg. The Temporary Global Note will be exchangeable, in whole or in part, for interests in a permanent global note (the “Permanent Global Note”, and together with the Temporary Global Note, each a “Global Note”), without interest coupons, not earlier than 40 days after the Issue Date upon certification as to non-U.S. beneficial ownership. Interest payments in respect of the Notes cannot be collected without such certification of non U.S. beneficial ownership. The Permanent Global Note will be exchangeable in certain limited circumstances in whole, but not in part, for Notes in definitive form in principal amounts equal to €100,000 and integral multiples of €1,000 in excess thereof, up to and including €199,000, each with interest coupons attached. No Notes in definitive form will be issued with a denomination above €199,000. See “Summary of Provisions Relating to the Notes in Global Form”. The Notes will be rated BB+ by S&P Global Ratings Italy S.r.l. (“S&P”). S&P is established in the EEA and registered under Regulation (EU) No 1060/2009, as amended (the “CRA Regulation”). S&P appears on the latest update of the list of registered credit rating agencies on the ESMA website http://www.esma.europa.eu. A security rating is not a recommendation to buy, sell or hold securities and may be subject to suspension, reduction or withdrawal at any time by the assigning rating agency. JOINT LEAD MANAGERS Banca IMI Banco Bilbao Vizcaya Argentaria, S.A. BNP PARIBAS Goldman Sachs International Natixis Santander Global Corporate Banking UniCredit Bank CO-MANAGERS Banca Akros S.p.A. - Gruppo Banco MPS Capital Services BPM Prospectus dated 24 October 2017 IMPORTANT NOTICES This document comprises a prospectus for the purposes of Article 5.3 of the Prospectus Directive. The Issuer accepts responsibility for the information contained in this Prospectus and declares that, having taken all reasonable care to ensure that such is the case, the information contained in this Prospectus, to the best of its knowledge, is in accordance with the facts and contains no omission likely to affect its import. The Issuer has confirmed to Banca IMI S.p.A., Banco Bilbao Vizcaya Argentaria, S.A., Banco Santander, S.A., BNP Paribas, Goldman Sachs International, Natixis and UniCredit Bank AG (the “Joint Lead Managers”) and Banca Akros S.p.A. - Gruppo Banco BPM and MPS Capital Services Banca per le Imprese S.p.A. (the “Co-Managers” and, together with the Joint Lead Managers, the “Managers”) that: this Prospectus contains or incorporates all information regarding the Issuer and the Group as of the date of this Prospectus (where “Group” means the Issuer and its consolidated subsidiaries) and the Notes which are (in the context of the issue of the Notes) material; such information is true and accurate in all material respects and is not misleading in any material respect; any opinions, predictions or intentions expressed in this Prospectus on the part of the Issuer or the Group are honestly held or made and are not misleading in any material respect; this Prospectus does not omit to state any material fact necessary to make such information, opinions, predictions or intentions (in such context) not misleading in any material respect; and all proper enquiries have been made to ascertain and to verify the foregoing. To the fullest extent permitted by law, none of the Managers, BNY Mellon Corporate Trustee Services Limited as trustee (the “Trustee”) or The Bank of New York Mellon as principal paying agent (the “Principal Paying Agent”) accepts any responsibility for the contents of this Prospectus or for any other statements made or purported to be made by any of the Managers or on its behalf or by the Trustee or on its behalf or by the Principal Paying Agent or on its behalf in connection with the Issuer or issue and offering of any Note. Each of the Managers, the Trustee and the Principal Paying Agent disclaims all and any liability whether arising in tort or contract or otherwise which it might otherwise have in respect of this Prospectus or any such statement. This Prospectus is to be read in conjunction with all documents which are deemed to be incorporated herein by reference (see “Information Incorporated by Reference”). This Prospectus should be read and construed on the basis that such documents are incorporated in and form part of this Prospectus. Investors should rely only on the information contained in this Prospectus. The Issuer has not authorised anyone to provide investors with different information. The initial purchasers are not and the Issuer is not making any offer of the Notes in any jurisdiction where the offer is not permitted. You should not assume that the information contained in this Prospectus is accurate as of any date other than the date on the cover of this Prospectus regardless of the time of delivery of this Prospectus or of any sale of the Notes. The Issuer has not authorised the making or provision of any representation or information regarding the Issuer or the Notes other than as contained in this Prospectus or as approved for such purpose by the Issuer.