Investor Presentaiton

B Offshore Mauritania Petroleum System Mauritania - core geologic theme in the same geography ⚫ Substantial Deepwater Potential – 6.7MM gross acres operated by KOS - Untested play down-dip in the proven Mauritania salt basin Upper Cretaceous Stratigraphic/ Structural Play Plans for 2D and 3D seismic in early 2013 First drilling targeted as early as 2014 A Atlantic Ocean Cretaceous Fans/Channels Tertiary Chinguetti Upper Cretaceous Source Kitchen KOSMOS ENERGY. MAURITANIA BLOCK C12 Albian Source Kitchen (90%) Salt Basin Tiof Discovery B Chinguetti Oil Field A BLOCK C13 BLOCK C8 (90%) (90%) 6.7 MM Gross Acres U. Cretaceous L. Cretaceous Jurassic 70 km 40 miles Senegal River Delta Investor Presentation 19 November 2012

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