OCEAN RIG UDW INC. ANNOUNCES COMMENCEMENT OF “REGULAR WAY” TRADING ON THE NASDAQ GLOBAL SELECT MARKET
News Release
Ocean Rig UDW Inc. (Corporate Head Office)
October 7, 2011
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<P align=left>Nicosia, Cyprus –October 6, 2011 – Ocean Rig UDW Inc. (the
“Company” or “Ocean</P>
<P align=left>Rig”) (Nasdaq:ORIG), a global provider of offshore deepwater
drilling services,</P>
<P align=left>announced that its common shares are expected to commence “regular
way” trading</P>
<P>today on the Nasdaq Global Select Market under the ticker symbol
“ORIG”.</P></FONT></DIV></BODY></HTML>
<HTML><HEAD><TITLE></TITLE>
<META content="text/html; charset=unicode" http-equiv=Content-Type>
<META name=GENERATOR content="MSHTML 8.00.6001.18904"></HEAD>
<BODY>
<DIV><FONT face="Times New Roman">
<P align=left>Nicosia, Cyprus –October 6, 2011 – Ocean Rig UDW Inc. (the
“Company” or “Ocean</P>
<P align=left>Rig”) (Nasdaq:ORIG), a global provider of offshore deepwater
drilling services,</P>
<P align=left>announced that its common shares are expected to commence “regular
way” trading</P>
<P>today on the Nasdaq Global Select Market under the ticker symbol
“ORIG”.</P></FONT></DIV></BODY></HTML>