Exhibit 8

List of CGG subsidiaries (March 31, 2016)

(Certain dormant or small subsidiaries of the Group have not been included in the list below)

French Companies	Head Office	% of interest
CGG Services SA	Massy, France		100.0
CGG Explo SARL	Massy, France		100.0
Geomar SAS	Massy, France		100.0
Sercel Holding SA	Carquefou, France		100.0
Sercel SA	Carquefou, France		100.0
Foreign Companies	Head Office		% of interest
CGG Holding BV	Amsterdam, Netherlands		100.0
CGG Marine BV	Amsterdam, Netherlands		100.0
CGG Data Management (Netherlands) BV	Montfoort, Netherlands		100.0
CGG Services (NL) BV	Gravenhage, Netherlands		100.0
De Regt Marine Cables BV	Krimpen aan de Lek, Netherlands		100.0
CGG Electromagnetics (Italy) Srl	Milan, Italy		100.0
CGG International SA	Geneva, Switzerland		100.0
CGG Data Services AG	Zug, Switzerland		100.0
CGG Geoscience GmbH	Zug, Switzerland		100.0
Wavefield Inseis AS	Oslo, Norway		100.0
CGG Marine Resources Norge AS	Oslo, Norway		100.0
CGG Geo Vessels AS	Oslo, Norway		100.0
CGG Services (Norway) AS	Oslo, Norway		100.0
Exploration Investment Resources II AS	Oslo, Norway		100.0
Exploration Vessel Resources II AS	Oslo, Norway		100.0
CGG Services (UK) Limited	Crawley, United Kingdom		100.0
CGG Data Management (UK) Limited	Crawley, United Kingdom		100.0
CGG Jason (UK) Limited	Crawley, United Kingdom		100.0
CGG NPA Satellite Mapping Limited	Crawley, United Kingdom		100.0
CGG Seismic Imaging (UK) Limited	Crawley, United Kingdom		100.0
Robertson (UK) Limited	Crawley, United Kingdom		100.0
Robertson Geospec International	Crawley, United Kingdom		100.0
Veritas Caspian LLP	Almaty, Kazakhstan		50.0
CGG do Brasil Participaçoes Ltda	Rio do Janeiro, Brazil		100.0
Veritas do Brasil Ltda	Rio do Janeiro, Brazil		100.0
LASA Prospeccoes SA	Rio do Janeiro, Brazil		100.0
CGGVeritas Services de Mexico SA de CV	Mexico City, Mexico		100.0
CGG Geoscience de Mexico SA de CV.	Mexico City, Mexico		100.0
Exgeo CA	Caracas, Venezuela		100.0
CGG Holding (U.S.) Inc.	Houston, United States		100.0
CGG Services (U.S.) Inc.	Houston, United States		100.0
CGG Land (U.S.) Inc.	Houston, United States		100.0
Viking Maritime Inc.	Houston, United States		100.0
CGG Canada Services Ltd	Calgary, Canada		100.0
CGG Services (Canada) Inc.	Calgary, Canada		100.0
CGG Services (Australia) Pty Ltd	Perth, Australia		100.0
CGG Ground Geophysics (Australia) Pty Ltd	Perth, Australia		100.0
PT CGG Services Indonesia	Jakarta, Indonesia		95.0
CGG Services India Private Ltd	Navi Mumbai, India		100.0

French Companies	Head Office	% of interest
CGG Technology Services (Beijing) Co. Ltd	Beijing, China		100.0
CGG Geoscience (Bejing) Ltd	Beijing, China		100.0
CGG Services (Singapore) Pte Ltd	Singapore		100.0
CGG Vostok	Moscow, Russia		100.0
Compagnie Generale de Geophysique (Nigeria) Ltd	Lagos, Nigeria		100.0
CGG Airborne Survey (Pty) Ltd	Sandton, South Africa		100.0
Sercel England Ltd	Edimburgh, United Kingdom		100.0
Sercel-GRC	Tulsa, United States		100.0
Sercel Inc.	Houston, United States		100.0
Sercel Canada Ltd	Calgary, Canada		100.0
Sercel Australia Pty Ltd	Sydney, Australia		100.0
Hebei Sercel-Junfeng Geophysical	Hebei ,China		51.0
Sercel (Beijing) Technological Services Co. Ltd	Beijing, China		100.0
Sercel Singapore Pte Ltd	Singapore		100.0
De Regt Germany GmbH	Dortmund, Germany		100.0

Each of our subsidiaries listed above is organised in the country in which its head office is located, and each such subsidiary does business under its registered name.