Information Related to the Availability of the Document de Référence and Report on Form 20-F for 2017

Paris, France | Mar 30, 2018

Société Anonyme with a share capital of €5,854,573
Registered office: Tour Maine Montparnasse, 33 avenue du Maine, 75015 Paris
No.: 969 202 241 – RCS Paris

CGG announced that its Document de référence and report on Form 20-F for 2017 were filed on Thursday, March 29, 2018, 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 on corporate governance mentioned under article L.225-37 of the French Commercial Code;
• 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 2017 are also included in the Document de référence and the report on Form 20-F, filed with the AMF and the SEC on March 29, 2018.

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.