Exhibit 99

Joint Filer Information

Date of Event
Requiring Statement:		May 2, 2012
Issuer Name and Ticker
or Trading Symbol:		Cobalt International Energy, Inc. [CIE]
Designated Filer:		Carlyle Group Management L.L.C.
Other Joint Filers:		The Carlyle Group, L.P.
		Carlyle Holdings I GP Inc.
		Carlyle Holdings I GP Sub L.L.C.
		Carlyle Holdings I L.P.
		TC Group Sub L.P.
Addresses:		The address of each of the reporting persons is c/o The Carlyle Group, 1001 Pennsylvania Ave., N.W., Suite 220 South, Washington, DC 20004-2505.

Signatures:

Dated: May 9, 2012

	CARLYLE GROUP MANAGEMENT L.L.C.
	By:	/s/ R. Rainey Hoffman, attorney-in-fact
		Name:	Daniel D'Aniello
		Title:	Chairman
	THE CARLYLE GROUP L.P. By: Carlyle Group Management L.L.C., its general partner
	By:	/s/ R. Rainey Hoffman, attorney-in-fact
		Name:	Daniel D'Aniello
		Title:	Chairman
	CARLYLE HOLDINGS I GP INC.
	By:	/s/ R. Rainey Hoffman, attorney-in-fact
		Name:	Daniel D'Aniello
		Title:	Chairman
	CARLYLE HOLDINGS I GP SUB L.L.C. By: Carlyle Holdings I GP Inc., its managing member
	By:	/s/ R. Rainey Hoffman, attorney-in-fact
		Name:	Daniel D'Aniello
		Title:	Chairman

	CARLYLE HOLDINGS I L.P. By: Carlyle Holdings I GP Sub L.L.C., its general partner By: Carlyle Holdings I GP Inc., its managing member
	By:	/s/ R. Rainey Hoffman, attorney-in-fact
		Name:	Daniel D'Aniello
		Title:	Chairman
	TC GROUP SUB L.P. By: TC Group, L.L.C., its general partner By: Carlyle Holdings I L.P., its managing member By: Carlyle Holdings I GP Sub L.L.C., its general partner By: Carlyle Holdings I GP Inc., its managing member
	By:	/s/ R. Rainey Hoffman, attorney-in-fact
		Name:	Daniel D'Aniello
		Title:	Chairman