FORWARD-LOOKING STATEMENTS This Annual Report contains forward-looking statements within the meaning of Section 27A of the Securities Act of 1933 and Section 21E of the Securities Exchange Act of 1934. All statements, other than statements of historical facts, included in this Annual Report that address activities, events or developments that Kosmos expects, believes or anticipates will or may occur in the future are forward- looking statements. Without limiting the generality of the foregoing, forward-looking statements contained in this Annual Report specifically include the expectations of management regarding plans, strategies, objectives, anticipated financial and operating results of the Company, including as to estimated oil and gas in place and recoverability of the oil and gas, estimated reserves, capital expenditures, typical well results and well profiles and production and operating expenses guidance included in this Annual Report. Kosmos’ estimates and forward-looking statements are mainly based on its current expectations and estimates of future events and trends, which affect or may affect its businesses and operations. Although Kosmos believes that these estimates and forward-looking statements are based upon reasonable assumptions, they are subject to several risks and uncertainties and are made in light of information currently available to Kosmos. When used in this Annual Report, the words “anticipate,” “believe,” “intend,” “expect,” “plan,” “will” or other similar words are intended to identify forward-looking statements. Such statements are subject to a number of assumptions, risks and uncertainties, many of which are beyond the control of Kosmos, which may cause actual results to differ materially from those implied or expressed by the forward-looking statements. Further information on such assumptions, risks and uncertainties is available in Kosmos’ Securities and Exchange Commission (“SEC”) filings. Kosmos’ SEC filings are available on its website at Kosmos undertakes no obligation and does not intend to update or correct these forward-looking statements to reflect events or circumstances occurring after the date of this Annual Report, whether as a result of new information, future events or otherwise, except as required by applicable law. You are cautioned not to place undue reliance on these forward-looking statements, which speak only as of the date of this Annual Report. All forward-looking statements are qualified in their entirety by this cautionary statement. BOARD OF DIRECTORS Andrew G. Inglis Chairman of the Board of Directors Chief Executive Officer Brian F. Maxted Chief Exploration Officer Sir Richard B. Dearlove Retired Head of the British Secret Intelligence Service (MI6) David I. Foley Senior Managing Director, Blackstone Group L.P. Chief Executive Officer, Blackstone Energy Partners David B. Krieger Managing Director, Warburg Pincus LLC Joseph P. Landy Co-President, Warburg Pincus & Company Adebayo O. Ogunlesi Chairman and Managing Partner, Global Infrastructure Partners Yves-Louis Darricarrère Retired Chief Executive Officer, Total Upstream Senior Advisor, Lazard Chris Tong Director, Targa Resources Corp. Christopher A. Wright Retired Executive Chairman and Chief Executive Officer, Fairfield Energy Limited SENIOR LEADERSHIP Andrew G. Inglis Chairman and Chief Executive Officer Brian F. Maxted Chief Exploration Officer Thomas P. Chambers Senior Vice President and Chief Financial Officer Christopher J. Ball Senior Vice President, Planning and Business Development Jason E. Doughty Senior Vice President, Legal, General Counsel and Corporate Secretary Eric J. Haas Senior Vice President, Production and Development Paul M. Nobel Senior Vice President, Controller and Chief Accounting Officer CORPORATE OFFICE Clarendon House 2 Church Street Hamilton HM 11, Bermuda U.S. OFFICE Kosmos Energy Ltd. c/o Kosmos Energy LLC 8176 Park Lane Suite 500 Dallas, TX 75231 WEBSITE STOCK EXCHANGE LISTING New York Stock Exchange London Stock Exchange Symbol: KOS ANNUAL MEETING June 5, 2018 8:00 a.m. Atlantic Daylight Time Rosewood Tucker’s Point 60 Tucker’s Point Drive Hamilton Parish HS 02, Bermuda FORM 10-K Copies of the corporation’s 10-K are available on our website at AUDITORS Ernst & Young Dallas, TX SHAREHOLDER SERVICES Computershare 250 Royall Street Canton, MA 02021 1-800-962-4284 (Toll-Free) 1-781-575-3120 (International) INVESTOR RELATIONS Additional corporate information is available on our website at CORPORATE INFORMATION