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Ocean Rig UDW Commences Trading on NASDAQ

September 19, 2011

Ocean Rig UDW Inc., a global provider of offshore deepwater drilling services, announced that its common shares are expected to commence “when issued” trading today on the Nasdaq Global Select Market under the ticker symbol “ORIGV”. The Company’s common shares are expected to commence “regular way” trading on the Nasdaq Global Select Market under the ticker symbol “ORIG” on October 6, 2011, the next trading day after the distribution date for the partial spin off of October 5, 2011.
Ocean Rig is an international offshore drilling contractor providing oilfield services for offshore oil and gas exploration, development and production drilling, and specializing in the ultra-deepwater and harsh-environment segment of the offshore drilling industry. The company owns and operates 9 offshore ultra deepwater drilling units, comprising of 2 ultra deepwater semisubmersible drilling rigs and 7 ultra deepwater drillships, 4 of which remain to be delivered to the company during 2011 and 2013.
www.ocean-rig.com

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