X0306 4 2012-10-01 0001471261 Cobalt International Energy, Inc. CIE 0001191751 YOUNG MARTIN H JR COBALT CENTER 920 MEMORIAL CITY WAY, SUITE 100 HOUSTON TX 77024 1 0 0 0 Common Stock 2012-10-01 4 A 0 1350 0 A 75255 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 fourth calendar quarter of 2012. /s/ Jeffrey A. Starzec 2012-10-03