EXHIBIT 99.2
JOINT FILING AGREEMENT
The undersigned acknowledge and agree that the foregoing statement on Schedule 13D is filed on behalf of each of the undersigned and that all subsequent amendments to this foregoing shall be filed on behalf of each of the undersigned without the necessity of filing additional joint filing agreements. The undersigned acknowledge that each shall be responsible for the timely filing of such amendments, and for the completeness and accuracy of the information concerning it contained therein, but shall not be responsible for the completeness and accuracy of the information concerning the others, except to the extent that it knows or has reason to believe that such information is inaccurate.
This Agreement may be executed in counterparts and each of such counterparts taken together shall constitute one and the same instrument.
Dates as of: December 2, 2013.
| | CAISSE DES DÉPÔTS ET CONSIGNATIONS |
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| By: | /s/ Alain MINCZELES |
| | Name: | Alain MINCZELES |
| | Title: | Head of Finance Division |
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| | BPIRANCE PARTICIPATIONS S.A. |
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| By: | /s/ Nicolas DUFOURCQ |
| | Name: | Nicolas DUFOURCQ |
| | Title: | Chairman of the Board and Chief Executive |
| | Officer |
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| | BPI —GROUPE (BPIFRANCE) |
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| By: | /s/ Nicolas DUFOURCQ |
| | Name: | Nicolas DUFOURCQ |
| | Title: | Chief Executive Officer |
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| | EPIC BPI-GROUPE |
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| By: | /s/ Arnaud CAUDOUX |
| | Name: | Arnaud CAUDOUX |
| | Title: | Chief Financial Officer |
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| | BPIRANCE INVESTISSEMENT |
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| By: | /s/ Nicolas DUFOURCQ |
| | Name: | Nicolas DUFOURCQ |
| | Title: | Chairman of the Board |
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| | FONDS DE CO-INVESTISSEMENT DIRECT |
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| By: | /s/ Nicolas DUFOURCQ |
| | Name: | Nicolas DUFOURCQ |
| | Title: | Chairman of the Board of Bpifrance Investissement, manager of Fonds de Co- Investissement Direct |
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| | NICOLAS DUROURCQ |
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| By: | /s/ Nicolas DUFOURCQ |
| | Name: | Nicolas DUFOURCQ |
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