Suspension of shares trading of OHL México

The Company, OBRASCÓN HUARTE LAIN, S.A. (OHL), in compliance with current legislation, hereby reports the following Significant Event:

SIGNIFICANT EVENT

Yesterday near to closing of the Mexican Stock Market the Mexican Stock Authority (CNBV) agreed the temporary suspension of shares trading of OHL México, S.A.B. de C.V. (“OHL México”), in which OHL has a majority stake.

According to the information received from the management of OHL México, the mentioned suspension was induced by the impact on share price of the publication of certain informations related to potential bad practices by OHL Mexico within the development of its. The mentioned informations rely on illegally obtained recordings.

OHL México’s management has published a communicate stating that the development of their businesses strictly complies to law, the contracts subscribed, and the best corporate practices. And expressly denies the existence of any irregular action within their relation with the State of Mexico.

Notwithstanding the above, it is in place the corresponding internal investigation to clarify the matters and adopt the measures that will deem appropriate.