Investor Presentaiton

Aaiun Basin Petroleum System Cap Boujdour - multi-billion barrel potential • Substantial, Frontier Basin - 7.3 MM gross acres operated by KOS Multiple Plays and Fairways - - Unexplored deepwater compressional anticline trend Upper and Lower Cretaceous targets with 3 independent play fairways • Multi-billion Barrel Potential - - Reprocessing existing 3D seismic data Approximately 20 prospects and leads identified - Potentially drill as early as late 2013 Toe Thrust Anticlines Jurassic Prospect 3-D Seismic Source Kitchen Slope Anticlines Fault Block Play 7.3 MM Gross Acres KOSMOS ENERGY. CAP BOUJDOUR (75%) Aaiun River : Delta 60 km 30 miles Investor Presentation 17 November 2012

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