Page 1 Page 2 Page 3 Page 4 Page 5 Page 6 Page 7 Page 8 Page 9 Page 10 Page 11 Page 12 Page 13 Page 14 Page 15 Page 16 Page 17 Page 18 Page 19 Page 20 Page 21 Page 22 Page 23 Page 24 Page 25 Page 26 Page 27 Page 28 Page 29 Page 30 Page 31 Page 32 Page 33 Page 34 Page 35 Page 36 Page 37 Page 38 Page 39 Page 40 Page 41 Page 42 Page 43 Page 44 Page 45 Page 46 Page 47 Page 48 Page 49 Page 50ABOUT KOSMOS ENERGY Kosmos Energy is a pathfinding oil and gas exploration and production company focused on frontier and emerging areas along the Atlantic Margin. Our assets include existing production and other major development projects offshore Ghana, large discoveries offshore Mauritania and Senegal, as well as exploration licenses with significant hydrocarbon potential offshore Portugal, São Tomé and Príncipe, Suriname, Morocco and Western Sahara. As an ethical and transparent company, Kosmos is committed to doing things the right way. Our Business Principles articulate the company’s commitment to transparency, ethics, human rights, safety and the environment. This report documents how we are meeting these commitments. Kosmos is listed on the New York Stock Exchange and is traded under the ticker symbol KOS. For additional information, visit www.kosmosenergy.com. ABOUT THIS REPORT Our 2015 report, “The Energy to Make a Difference,” explains how corporate responsibility is a fundamental part of Kosmos Energy’s day-to-day business, and how we are making a positive difference in our host countries. The report reviews the application of our Business Principles and supporting policies across each stage of the upstream project lifecycle. Selection of information for inclusion in this report was based on internal materiality discussions, external stakeholder feedback, and consultations with third-party experts. Among other things, the report is designed to communicate our progress on the Ten Principles of the United Nations Global Compact, which we support and endorse. Additionally, this report is guided by the International Petroleum Industry Environmental Conservation Association (IPIECA) standards for voluntary reporting in the oil and gas sector and by the Global Reporting Initiative (GRI), although it is not wholly in accordance with GRI guidelines. For an index of where information related to the Ten Principles and IPIECA reporting standards is located, please see page 42. This report has not received external assurance from an independent third party. We appreciate your interest in our company and welcome your feedback on how we can improve our reporting. Please contact us at CorporateResponsibility@kosmosenergy.com. 2  Letter to Stakeholders 4  Oil and Gas Project Lifecycle 5  2015 Financial Highlights 6  Kosmos Energy’s Business Principles – Responsibilities to Stakeholders, Ethical Conduct, Our Workplaces, Kosmos and the Environment, Kosmos in Society, and Commercial Responsibilities 14  Connecting Dallas to the World through Art and Science 18 Ghana 24 Senegal 28 Mauritania 32 Morocco 34 Western Sahara 37 Measuring Success in Cameroon 38 Suriname 40 Promoting Transparency 42  IPIECA/API/OGP Content index 45  2015 Performance Data CONTENTS About the Cover A woman and her child walk along the beach of Lompoul, Senegal. Kosmos engages regularly with fishing and coastal communities in Senegal through our Environmental and Social Impact Assessments, communications on our operational activities, and social investment projects.