Atlantic Ocean WESTERN SAHARA BOUJDOUR MARITIME BLOCK BOUJDOUR MARITIME BLOCK WESTERN SAHARA Following a review of our global operations, Kosmos made the difficult decision to withdraw from Western Sahara after more than a decade of investment in the region. The decision to withdraw from the Boujdour Maritime block was made as part of an industry-standard portfolio review, and is based on a combination of exploration results and our capital allocation strategy. Kosmos has held rights to explore an area offshore Western Sahara since 2006. Kosmos completed its first exploration well offshore Western Sahara in early 2015. The well encountered hydrocarbons, but not in commercial quantities. With our withdrawal effective 31 December 2017, Kosmos has transitioned its exploration work on the Boujdour Maritime block to ONHYM. Kosmos has assigned the relevant service contracts to ONHYM so ONHYM can complete the acquisition of additional 3D seismic data. For a period of time, including after its withdrawal, Kosmos is providing ONHYM with oversight and quality assurance services to ensure this work is completed. MANAGING OUR FOOTPRINT While deciding to leave was a difficult decision given our decade-long presence in Western Sahara, we are doing everything we can to make the process of leaving as smooth as possible for everyone involved. Kosmos transitioned its exploration work on the Boujdour Maritime block to ONHYM, but continues to provide ONHYM with the oversight and quality assurance services to make the transition successful. PHASE 1 PHASE 2 PHASE 3 PHASE 4 PHASE 5 PHASE 6