Availability of a securities note supplement to the prospectus

Paris, France | Oct 17, 2017

CGG announces that, today, the Autorité des marchés financiers granted visa no.17-559 to the securities note supplement (the “Securities Note Supplement”) to the prospectus (in the French language) approved by the AMF under visa no.17-551 on October 13th, 2017, in connection with certain issuances provided for under the draft safeguard plan and the Chapter 11 plan in the context of the financial restructuring plan of CGG. The Securities Note Supplement supplements the prospectus and shall be read in conjunction with it.

This Securities Note Supplement describes the undertaking of Bpifrance Participations to vote in favor of the resolutions required to implement the financial restructuring plan, as well as the related undertakings made by the Company and certain of its creditors in the context of the safeguard proceedings.

The prospectus comprises the CGG registration document (document de référence), filed with the AMF on May 1, 2017 under number D.17-0486, the update of the Company’s registration document filed with the AMF on October 13, 2017 under number D.17-0486-A01, the securities note approved by the AMF on October 13, 2017 under visa no.17-551, the securities note supplement dated October 17th, 2017 approved by the AMF under visa no.17-559, and a summary of the prospectus (included in the securities note).

Copies of the prospectus can be obtained free of charge from the registered office of CGG, Tour Maine Montparnasse, 33 Avenue du Maine – 75015 Paris, the Company’s website (www.cgg.com) and the AMF website (www.amf-france.org).
 

Appendix: supplement to the summary of the prospectus
 

The press release shall not constitute an offer to sell or the solicitation of an offer to buy securities. There will not be any sale of these securities in any such state or country in which such offer, solicitation or sale would be unlawful prior to registration or qualification under the securities laws of any state or country.

The securities referred to herein have not been and will not be registered under the US Securities Act of 1933, as amended (the "Securities Act") and may not be offered and sold in the United States absent registration or an applicable exemption from the registration requirements of the Securities Act.