NEW YORK SHARES

Cobalt International Energy, Inc. is an independent, oil-focused exploration and production company with a salt prospect inventory in the deepwater of the United States Gulf of Mexico and offshore Angola and Gabon in West Africa. The Company has a portfolio of 132 identified prospects, consisting of 47 prospects located in the deepwater United States Gulf of Mexico and 85 prospects located in Blocks 9 and 21 offshore Angola and the Diaba Block offshore Gabon. In addition, it acquired a 40% 40% working interest and indicated as operator of Block 20 offshore Angola, on which it had 37 prospects. As of December 31, 2010, it had two drilling rigs under contract: the Ensco 8503 drilling rig and the Diamond Offshore Ocean Confidence drilling rig. As of December 31, 2010, it drilled as operator two exploratory wells (Ligurian #1 and Criollo #1) and participated as non-operator in three exploratory wells (Heidelberg #1, Shenandoah #1 and Firefox #1) and one appraisal well (Heidelberg #2).