Houston, Texas -- September 4, 2009 -- Cobalt International Energy, Inc. (“Cobalt") announced today that it has filed a registration statement on Form S-1 with the U.S. Securities and Exchange Commission relating to a proposed initial public offering of shares of its common stock. Cobalt intends to apply to list its common stock on the New York Stock Exchange.

Credit Suisse Securities (USA) LLC, Goldman, Sachs & Co. and J.P. Morgan Securities Inc. will act as joint book-running managers of the offering.

A registration statement relating to these securities has been filed with the U.S. Securities and Exchange Commission but has not yet become effective. These securities may not be sold nor may offers to buy be accepted prior to the time that the registration statement becomes effective. This press release does not constitute an offer to sell or a solicitation of an offer to buy the securities described above, nor shall there be any sale of the securities in any state or jurisdiction in which such offer, solicitation, or sale would be unlawful prior to registration or qualification under the securities laws of any such state or jurisdiction.

The offering of these securities will be made only by means of a prospectus, copies of which may be obtained, when available, from Credit Suisse, Prospectus Department, One Madison Avenue, New York, NY, 10010 or by calling (800) 221-1037, from Goldman, Sachs & Co., Attention: Prospectus Department, 85 Broad Street, New York, NY, 10004 or by calling (866) 471-2526, or from J.P. Morgan, National Statement Processing, Prospectus Library, 4 Chase Metrotech Center, CS Level, Brooklyn, New York, 11245 or by calling (718) 242-8002.

Contact:
Jeff Starzec
Associate General Counsel
(713) 579-9100