Certain American Depository Shares of Aenza S.A.A. are subject to a Lock-Up Agreement Ending on 19-JAN-2014. These American Depository Shares will be under lockup for 180 days starting from 23-JUL-2013 to 19-JAN-2014.

Details:
The directors and officers and certain of the shareholders have agreed that they will not sell any of the common shares or American Depository Shares for a period of 180 days after the date of the prospectus without the prior approval of Credit Suisse Securities (USA) LLC, J.P. Morgan Securities LLC and Morgan Stanley & Co. LLC.