Ocean Rig UDW Inc. Announces Availability of 2012 Annual Report on Form 20-F

NICOSIA, CYPRUS--(Marketwire - Mar 22, 2013) -  Ocean Rig UDW Inc. (NASDAQ: ORIG) (the "Company" or "Ocean Rig"), a global provider of offshore deepwater drilling services, today announced that its annual report on Form 20-F for the year ended December 31, 2012 (the "Annual Report") has been filed with the U.S. Securities and Exchange Commission. The Annual Report may also be accessed through the Ocean Rig website, www.ocean-rig.com, at the Investor Relations section under Quarterly and Annual Reports.

Shareholders may also request a hard copy of the Annual Report, which includes the Company's complete 2012 audited financial statements, free of charge by contacting Capital Link Inc., the Company's investor relations advisor, using the contact details provided below.

About Ocean Rig
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 10 offshore ultra deepwater drilling units, comprising of 2 ultra deepwater semisubmersible drilling rigs and 8 ultra deepwater drillships, 3 of which remain to be delivered to the company during 2013 and 1 during 2015.

Ocean Rig's common stock is listed on the NASDAQ Global Select Market where it trades under the symbol "ORIG."

Visit the Company's website at www.ocean-rig.com.