Significant Event. Operation

OBRASCÓN HUARTE LAIN, S.A. (“OHL” or the “Company”) in compliance with the provisions of Article 228 of the Refunded Text of the Securities Market Act approved by Royal Decree Law 4/2015 of 23^rd October informs the National Stock Market Commission of the following

SIGNIFICANT EVENT

In relation to the news published in the press today, OHL informs that Grupo Villar Mir S.A. (GVM) and the Company are under conversations with Amodio family to execute a possible transaction (the Transaction) which involves an entry in the capital structure of OHL of the Amodio, as support of the Company business plan through the subscription of a capital increase by Amodio, not exceeding the 20% of the present capital, with exclusion of pre-emptive subscription rights, linked with the sale by GVM of part of its stake in the interest of the Company and its stakeholders. The capital increase, must be submitted for approval by the General Shareholders Meeting.

The Transaction does not imply the acquisition of a controlling stake by the Amodio family, which, under any circumstances, will reach 30% of the voting rights of OHL.

To date there is no binding agreement.

Madrid, 22 October 2019