UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

FORM 6-K

REPORT OF FOREIGN ISSUER
PURSUANT TO RULE 13a-16 OR 15b-16 OF
THE SECURITIES EXCHANGE ACT OF 1934

For the month of December, 2014

Commission File Number 001-35591

GRAÑA Y MONTERO S.A.A.

(Exact name of registrant as specified in its charter)

GRAÑA Y MONTERO GROUP

(Translation of registrant’s name into English)

Republic of Peru

(Jurisdiction of incorporation or organization)

Avenida Paseo de la República 4667, Lima 34,

Surquillo, Lima

Peru

(Address of principal executive offices)

Indicate by check mark whether the registrant files or will file annual reports under cover Form 20-F or Form 40-F:

Indicate by check mark if the registrant is submitting the Form 6-K in paper as permitted by Regulation S-T Rule 101(b)(1): [ ]

Indicate by check mark if the registrant is submitting the Form 6-K in paper as permitted by Regulation S-T Rule 101(b)(7): [ ]

Indicate by check mark whether the registrant by furnishing the information contained in this Form is also thereby furnishing the information to the Commission pursuant to Rule 12g3-2(b) under the Securities Exchange Act of 1934.

If "Yes" is marked, indicate below the file number assigned to the registrant in connection with Rule 12g3-2(b): Not applicable.

Hereby we inform as a Relevant Information Communication that, on November 27, 2014 under file N° 2014045106, we fulfilled to communicate the binding offer we made, to acquire a 70% stake in the Colombian company Morelco S.A., which was accepted by its shareholders, establishing a period of 15 days for the subscription of the corresponding contract.

It is the case that to date, December 04, 2014, our subsidiary GyM S.A. has subscribed the contract for the purchase of shares with Morelco S.A.’s shareholders for the acquisition of the stake equivalent to 70% of the share capital of the company.

In the contract, it has been determined mid-February 2015 as a closing date, period in which certain obligations indicated in the contract must be fulfilled. In the closing date, GyM S.A. will disburse US$ 78 million through a direct purchase and through a capital increase in Morelco S.A. and, will take control of the company.

At the appropriate time, we will communicate the closing of the transaction to the market.

/s/ Dennis Gray Febres
Stock Market Representative
Graña y Montero S.A.A.

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized.