X0303 4 2011-04-01 0001471261 Cobalt International Energy, Inc. CIE 0001191751 YOUNG MARTIN H JR C/O TWO POST OAK CENTRAL 1980 POST OAK BOULEVARD, SUITE 1200 HOUSTON TX 77056 1 0 0 0 Common Stock 2011-04-01 4 A 0 1802 0 A 42227 D The reporting person elected to receive, subject to deferral under the Issuer's Non-Employee Directors Deferral Plan, the reported securities in lieu of a cash retainer under the Issuer's Non-Employee Directors Compensation Plan in respect of his service to the Board of Directors of the Issuer and his service as Chairman of the Audit Committee of the Board of Directors of the Issuer for the second calendar quarter of 2011. /s/ Jeffrey A. Starzec, Attorney-in-Fact 2011-04-04