Ocean Rig UDW Inc. is a corporation incorporated under the laws of the Republic of the Marshall Islands on December 10, 2007 under the name Primelead Shareholders Inc. The Company is an offshore drilling contractor providing oilfield services and drilling vessels for offshore oil and gas exploration, development and production drilling, in the ultra-deepwater and harsh-environment segment of the offshore drilling industry. The Company, through its wholly-owned subsidiaries, currently own and operate two modern, fifth generation ultra-deepwater semi-submersible offshore drilling rigs, the Leiv Eiriksson and the Eirik Raude, four sixth generation advanced capability ultra-deepwater drillships, the Ocean Rig Corcovado, the Ocean Rig Olympia, the Ocean Rig Poseidon, and the Ocean Rig Mykonos and three seventh generation advanced capability ultra-deepwater drillships, the Ocean Rig Mylos, the Ocean Rig Skyros. It has newbuilding contracts with Samsung for the construction of three seventh generation drillships, the Ocean Rig Athena, the Ocean Rig Apollo and the Ocean Rig Santorini. The Company operates in one reportable segment, the offshore drilling operations. Its customers are generally oil companies, integrated oil and gas companies, state-owned national oil companies and independent oil and gas companies. The Company together with its predecessor, Ocean Rig ASA, has an established history with 185 wells drilled in 19 countries for 30 different customers. It competes with offshore drilling contractors that, as of January 2014, together have approximately 203 deepwater and ultra-deepwater drilling units, defined as units with water depth capacity of 3,000 feet or more. Its offshore drilling operations include activities that are subject to numerous international, federal, state and local laws and regulations.