X0303 4 2011-06-15 0001509991 Kosmos Energy Ltd. KOS 0001517321 Dailly Paul A C/O KOSMOS ENERGY, LLC 8176 PARK LANE, SUITE 500 DALLAS TX 75231 0 1 0 0 Senior V.P, Exploration Common Shares 2011-06-15 4 M 0 388232 0 A 6359187 D Common Shares 1514666 I See footnote Common Shares (Right to Receive) 2011-06-15 4 M 0 388232 0 D 2011-06-15 2011-06-15 Common Shares 388232 0 D Each unit underlying the right to receive common shares is the economic equivalent of one common share. The units were settled for restricted shares that are scheduled to vest on May 16, 2015 (the fourth anniversary of the Issuer's initial public offering described in the prospectus dated May 11, 2011), subject to the satisfaction of service and performance conditions specified in the Issuer's Long Term Incentive Plan and an award agreement issued under the plan. These shares are directly owned by Dailly-Simmie Ventures, Ltd., an entity controlled by the reporting person. The reporting person disclaims beneficial ownership of these shares except to the extent of his pecuniary interest therein. /s/ Phillip Feiner, as Attorney-in-Fact 2011-06-17