Investor Presentaiton

25 25 20 20 15 10 10 5 Expanding Exploration Portfolio Increasing opportunity set to open petroleum systems Gross Exploration Acreage (million acres) 0 Jan June Dec Today 2011 2011 2011 ● KOSMOS ENERGY. Accelerating Inventory Build - - Ongoing identification and evaluation of new basins with significant hydrocarbon potential Capturing strategic positions and operatorship • Recent Acreage Adds in Suriname, Mauritania, and Morocco - Focused on existing and new geologic themes and geographies • Substantial Expansion Since IPO - ~3X increase since early 2011 - Attracting significant industry interest Investor Presentation 11 November 2012

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