Graña y Montero subscribes Contract with PeruPetro for Blocks III and IV

Graña y Montero S.A.A. (NYSE: GRAM) (BVL: GRAMONC1) (“the Company” or “Graña y Montero”) a leading Engineering and Construction company, announced that its subsidiary GMP S.A. has subscribed with PERUPETRO S.A. the public deed which contains the License Contract for Exploitation of Hydrocarbons in Blocks III and IV, located in the Talara basin, in the region of Piura for a period of 30 years.

As planned, the start of operations of Blocks III and IV will begin on April 5, 2015.

About Graña y Montero S.A.A.

Founded in 1933, Graña y Montero is the only Peruvian engineering and construction company listed on the Lima Stock Exchange since 1997 and now also the NYSE. The Company has participated in the development of major engineering and construction projects in Peru, including large-scale, complex projects in the energy, mining, construction and real estate sectors.

With 81 years of operations, the Company has leveraged its engineering and construction expertise into complementary lines of business, such as the development, ownership, operation and maintenance of infrastructure assets, real estate developments, and the provision of technical services. The Company has significant investments in infrastructure concessions, such as three toll roads and Line 1 of the Lima Metro.

The Company has also executed several projects outside Perú, and has acquired three companies in Chile: DSD Construcciones y Montajes, an engineering and construction company specialized in providing services to the energy, oil and gas, cellulose and mining sector in Chile and Latin America; Vial y Vives, a construction company specialized in the mining sector, and CAM, which is specialized in electric services, with operations in Chile, Peru and Colombia.

Graña y Montero S.A.A.Claudia Drago, 511-213-6578Chief Legal and Corporate Affairs [e-mail] Gray F., 511-213-6583Investor Relations [e-mail]@gym.com.pe