MAURITANIA SENEGAL BLOCK C13 BLOCK C8 BLOCK C12 BLOCK C6 BLOCK C18 Atlantic Ocean MAURITANIA Since first acquiring licenses in Mauritania, Kosmos has drilled three successful offshore exploration wells. We drilled the Tortue-1 well and the Ahmeyim-2 well in the southern part of block C8 and made important discoveries in the Greater Tortue area. Kosmos also made another major gas discovery in the northern part of block C8 when our Marsouin-1 exploration well encountered at least 70 meters of net natural gas pay, representing a significant, play-extending find. The Greater Tortue natural gas resource is a single large gas accumulation that stretches across the maritime boundary between Mauritania and Senegal. The scale and quality of the gas field, and the exploration potential of the rest of the basin, attracted the attention of several major international oil companies who expressed their interest in partnering with us. Following a thorough farm-out process, BP was chosen as the right partner to help Kosmos advance the Greater Tortue gas project at pace and take forward a multi- well exploration program in both Mauritania and Senegal. Kosmos currently holds licenses for blocks 6, 8, 12, 13 and 18 offshore Mauritania, as shown in the map at left. Since late 2016, our partners in blocks 6, 8, 12, and 13 are BP and Société Mauritanienne Des Hydrocarbures et de Patrimoine Minier (SMHPM), with 65% and 10% working interests, respectively. In 2017, we transitioned operatorship of the Greater Tortue gas development project to BP. EXPLORATION APPRAISAL DEVELOPMENT DRILLING DRILLING PHASE 1 PHASE 2 PHASE 3 PHASE 4 PHASE 5 PHASE 6