OCEAN RIG UDW INC. ANNOUNCES COMMENCEMENT OF “WHEN ISSUED” TRADING ON THE NASDAQ GLOBAL SELECT MARKET
News Release
Ocean Rig UDW Inc. (Corporate Head Office)
September 19, 2011
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<P align=left>Nicosia, Cyprus </FONT><FONT face="Times New Roman">– </FONT><FONT
face="Times New Roman">September 19, 2011 </FONT><FONT face="Times New Roman">–
Ocean Rig UDW Inc. (the “Company” or</P>
<P align=left>“Ocean Rig”)</FONT><FONT face="Times New Roman">, a global
provider of offshore deepwater drilling services, announced</P>
<P align=left>that its common shares </FONT><FONT face="Times New Roman">are
expected to commence “when issued” trading </FONT><FONT
face="Times New Roman">today on the</P></FONT><FONT face="Times New Roman">
<P align=left>Nasdaq Global Select Market under the ticker symbol
“ORIGV”</FONT><FONT face="Times New Roman">. </FONT><FONT
face="Times New Roman">The Company’s</P>
<P align=left>common shares are expected to commence “regular way” trading on
the Nasdaq</P></FONT><FONT face="Times New Roman">
<P align=left>Global Select </FONT><FONT face="Times New Roman">Market under the
ticker symbol “ORIG” on October 6, 2011, the next</P></FONT><FONT
face="Times New Roman">
<P>trading day after the distribution date for the partial spin off of October
5, 2011.</P></FONT></DIV></BODY></HTML>
<HTML><HEAD><TITLE></TITLE>
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<DIV><FONT face="Times New Roman">
<P align=left>Nicosia, Cyprus </FONT><FONT face="Times New Roman">– </FONT><FONT
face="Times New Roman">September 19, 2011 </FONT><FONT face="Times New Roman">–
Ocean Rig UDW Inc. (the “Company” or</P>
<P align=left>“Ocean Rig”)</FONT><FONT face="Times New Roman">, a global
provider of offshore deepwater drilling services, announced</P>
<P align=left>that its common shares </FONT><FONT face="Times New Roman">are
expected to commence “when issued” trading </FONT><FONT
face="Times New Roman">today on the</P></FONT><FONT face="Times New Roman">
<P align=left>Nasdaq Global Select Market under the ticker symbol
“ORIGV”</FONT><FONT face="Times New Roman">. </FONT><FONT
face="Times New Roman">The Company’s</P>
<P align=left>common shares are expected to commence “regular way” trading on
the Nasdaq</P></FONT><FONT face="Times New Roman">
<P align=left>Global Select </FONT><FONT face="Times New Roman">Market under the
ticker symbol “ORIG” on October 6, 2011, the next</P></FONT><FONT
face="Times New Roman">
<P>trading day after the distribution date for the partial spin off of October
5, 2011.</P></FONT></DIV></BODY></HTML>