CGG: Information Related to the Availability of t

CGG Société Anonyme with a share capital of €17,706,519 Registered office: Tour Maine Montparnasse, 33 avenue du Maine, 75015 Paris No.: 969 202 241 - RCS Paris

Information Related to the Availability of the Document de Référence and Report on Form 20-F for 2016

Paris, France - May 1, 2017

CGG announced that its Document de référence and report on Form 20-F for 2016 were filed today with the Autorité des Marchés Financiers (AMF) and the SEC respectively.

Both documents are available to the public under the conditions provided by law.

They are also available on the Company's website ( www.cgg.com ) under the Investors/Financial Reports section as well as on the AMF website for the Document de référence (www.amf-france.org) and the SEC website for the report on Form 20-F ( www.sec.gov ) .

The following information is included in the Document de référence :

• the report of the Chairman on the composition, preparation and organization of the board of directors' work, on internal control and risk management along with the related auditors' report;
• the auditors' reports on the financial statements and the information related to their fees;
• the description of the share buyback program; and
• the annual financial report mentioned under article L.451-1-2 of the French Code Monétaire et Financier .

Our audited financial statements for fiscal year 2016 are also included in the Document de référence and the report on Form 20-F, filed with the AMF and the SEC on May 1, 2017.

As of this day, the discussions between the Company and some of its creditors for its financial restructuring are still on-going. The Company will disclose its 2017 first quarter results on May 12, 2017.

 A printed copy of these documents is available upon request, free of charge, if you call our Investor Relations Department at: +33.1.64.47.35.46, or send an email to invrelparis@cgg.com or write to: CGG - Investor Relations Department - Tour Maine Montparnasse, 33 avenue du Maine, 75015 Paris, France.

About CGG:

CGG ( www.cgg.com ) is a fully integrated Geoscience company providing leading geological, geophysical and reservoir capabilities to its broad base of customers primarily from the global oil and gas industry. Through its three complementary businesses of Equipment, Acquisition and Geology, Geophysics & Reservoir (GGR), CGG brings value across all aspects of natural resource exploration and exploitation. CGG employs around 5,800 people around the world, all with a Passion for Geoscience and working together to deliver the best solutions to its customers. CGG is listed on the Euronext Paris SA (ISIN: 0013181864 ) and the New York Stock Exchange (in the form of American Depositary Shares. NYSE: CGG).

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