Receipt of Requisite Majority Consent from Holders

Paris, France | Feb 20, 2017

On February 6, 2017, CGG S.A. (“CGG”) announced a consent solicitation in respect of its Senior Notes (the “Notes Solicitation”) and its Term Loan B (the “TLB Solicitation”). As previously disclosed, the purpose of the Notes Solicitation and the TLB Solicitation is to permit CGG to amend the Senior Notes and the Term Loan B documentation such that CGG would have the option to request the appointment of a ‘mandataire ad hoc’ (a French facilitator for creditor negotiations) without such action constituting an Event of Default under the Senior Notes and Term Loan B documentation.

CGG today announces (i) that it has successfully completed the TLB Solicitation by receiving consent from the requisite majority of holders of the Term Loan B, (ii) that it has successfully completed the consent solicitations in respect of each of its 2020 Notes, its 2021 Notes and its 2022 Notes by receiving consent from the requisite majority of the holders of such notes and (iii) that it has waived the condition in the Consent Solicitation Statement dated February 3, 2017 (the “Consent Solicitation Statement”) regarding the receipt of the requisite consents with respect to the 2017 Notes. Accordingly, the change in the Term Loan B documentation has become effective and CGG intends to enter into the supplemental indentures in respect of the 2020 Notes, the 2021 Notes and the 2022 Notes as soon as practicable to give effect to the amendments proposed in the Consent Solicitation Statement.

CGG also announces the extension of the consent solicitation and the Revocation Deadline in respect of its 2017 Notes (the “2017 Notes Solicitation Extension”). The 2017 Notes Solicitation Extension will expire at 5:00 pm New York City time on February 22, 2017. As of 5:00 pm New York City time on February 17, 2017, CGG had received the consent of holders of approximately 16.3% of the aggregate principal amount ($8,319,000) of the 2017 Notes.

“Senior Notes” means CGG’s 7.750% Senior Notes due 2017 (CUSIP: 204386AK2 / ISIN: US204386AK24) (the “2017 Notes”), 6.500% Senior Notes due 2021 (CUSIP: 204384AB7 / ISIN: US204384AB76; CUSIP: F1704UAD6 / ISIN: USF1704UAD66) (the “2021 Notes”), 5.875% Senior Notes due 2020 (Reg. S ISIN: XS1061175607 / Reg. S Common Code: 106117560; Rule 144A ISIN: XS1061175862 / Rule 144A Common Code: 106117586) (the “ 2020 Notes”) and 6.875% Senior Notes due 2022 (Reg. S CUSIP: F1704UAC8 / Reg. S ISIN: USF1704UAC83; Registered CUSIP: 12531TAB5 / Registered ISIN: US12531TAB52)(the “2022 Notes”).

“Term Loan B” means the $342 million term loan facility with CGG’s subsidiary, CGG Holding (US) Inc., as borrower.