Security	Date	Code	Shares	Price	A/D	Owned after	D/I	Nature of ownership
Common Shares^{F1,F2,F7,F8,F9,F10}	May 26, 2017	S	28,025,108	$7.15	D	49,756,101	I	See Footnotes
Common Shares^{F1,F3,F7,F8,F9,F10}	May 26, 2017	S	457,034	$7.15	D	811,425	I	See Footnotes
Common Shares^{F1,F4,F7,F8,F9,F10}	May 26, 2017	S	781,182	$7.15	D	1,278,921	I	See Footnotes
Common Shares^{F1,F5,F7,F8,F9,F10}	May 26, 2017	S	648,610	$7.15	D	1,061,882	I	See Footnotes
Common Shares^{F1,F6,F7,F8,F9,F10}	May 26, 2017	S	88,066	$7.15	D	144,183	I	See Footnotes

Table II — derivative securities

No Table II lines on this filing.

Explanation of responses

F1This amount represents the $7.25 public offering price per common share, par value $0.01 per share (the "Common Shares"), of Kosmos Energy Ltd. (the "Issuer"), less the underwriting discount of $0.10 per Common Share.
F10Each of the Reporting Persons (other than each of the Blackstone Funds to the extent they directly hold securities reported herein), disclaims beneficial ownership of the securities held by the Blackstone Funds, except to the extent of such Reporting Person's pecuniary interest therein, and, pursuant to Rule 16a-1(a)(4) under the Securities Exchange Act of 1934, each of the Reporting Persons (other than each of the Blackstone Funds to the extent they directly hold securities reported herein) states that the inclusion of these securities in this report shall not be deemed an admission of beneficial ownership of all of the reported securities for purposes of Section 16 or for any other purpose.
F2These Common Shares are held by Blackstone Capital Partners (Cayman) IV L.P. ("BCP Cayman IV").
F3These Common Shares are held by Blackstone Capital Partners (Cayman) IV-A L.P. ("BCP Cayman IV-A").
F4These Common Shares are held by Blackstone Family Investment Partnership (Cayman) IV-A L.P. ("BFIP").
F5These Common Shares are held by Blackstone Family Investment Partnership (Cayman) IV-A SMD L.P. ("BFIP SMD").
F6These Common Shares are held by Blackstone Participation Partnership (Cayman) IV L.P. ("BPP", together with BCP Cayman IV, BCP Cayman IV-A, BFIP and BFIP SMD, the "Blackstone Funds").
F7The general partner of BFIP SMD is Blackstone Family GP L.L.C., which is wholly owned by Blackstone's senior managing directors and controlled by Mr. Stephen A. Schwarzman, its founder. The general partner of BCP Cayman IV and BCP Cayman IV-A is Blackstone Management Associates (Cayman) IV L.P. ("BMA"). A general partner of BMA, BFIP, and BPP is BCP IV GP L.L.C ("BCP IV"). Blackstone Holdings III L.P. is the sole member of BCP IV. The general partner of Blackstone Holdings III L.P. is Blackstone Holdings III GP L.P. The general partner of Blackstone Holdings III GP L.P. is Blackstone Holdings III GP Management L.L.C. The sole member of Blackstone Holdings III GP Management L.L.C. is The Blackstone Group L.P. The general partner of The Blackstone Group L.P. is Blackstone Group Management L.L.C. Blackstone Group Management L.L.C. is wholly owned by Blackstone's senior managing directors and controlled by its founder, Stephen A. Schwarzman.
F8Due to the limitations of the electronic filing system certain Reporting Persons are filing a separate Form 4.
F9Information with respect to each of the Reporting Persons is given solely by such Reporting Person, and no Reporting Person has responsibility for the accuracy or completeness of information supplied by another Reporting Person.