OCEANRIGUDWINC.ANNOUNCESSECONDQUARTER2016RESULTS RELEASEDATE,CONFERENCECALLANDWEBCAST

Nicosia,Cyprus–August5, 2016-OceanRigUDWInc.(NASDAQ:ORIG)(“Ocean Rig”),aglobalproviderofoffshoredeepwaterdrillingservices,announcedtodaythatit willreleaseitsresultsforthesecond quarter2016afterthemarketclosesinNewYorkon Thursday, August11, 2016.

Conference Calldetails:

Friday, August12, 2016, at8:00 a.m.EDT

Participantsshoulddialintothecall10minutesbeforethescheduledtimeusingthe followingnumbers:1(866)819-7111(fromtheUS),0(800)953-0329(fromtheUK)or

+(44)(0)1452 542301 (fromoutsidethe US). Pleasequote "Ocean Rig".

AreplayoftheconferencecallwillbeavailableuntilFriday, August19, 2016. TheUnitedStatesreplaynumberis1(866)247-4222;fromtheUK0(800)953-1533;thestandardinternationalreplaynumberis(+44)(0)1452550000andtheaccess code requiredforthereplay is:55592075#.

Slides andaudiowebcast:

TherewillalsobeasimultaneouslivewebcastovertheInternet,throughtheOcean RigUDWInc.website( registeronthe website approximately10 minutespriortothe startofthewebcast.

About Ocean Rig UDW Inc.

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 ultradeepwater and harsh-environment segment of the offshore drilling industry.

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

Visitthe Company’swebsite at

NOTE: Matters discussed in this release may constitute forward-looking statements. Forward- looking statements relate to Ocean Rig’s expectations, beliefs, intentions or strategies regardingthe future. These statements may be identified by the use of words like “anticipate', “believe', “estimate', “expect', “intend', “may', “plan', “project', “should', “seek', and similar expressions. Forward-looking statements reflect Ocean Rig’s current views and assumptions with respect to future events and are subject to risks and uncertainties.

Theforward-lookingstatementsinthisreleasearebaseduponvariousassumptions,manyofwhichare based, in turn, upon further assumptions, including without limitation, management’sexaminationofhistoricaloperatingtrends,datacontainedinOceanRig’srecordsandotherdataavailablefromthirdparties.AlthoughOceanRigbelievesthattheseassumptionswerereasonablewhen made, because these assumptions are inherently subject to significant uncertainties andcontingencieswhicharedifficultorimpossibletopredictandarebeyondOceanRig’scontrol,OceanRigcannotassureyouthatitwillachieveoraccomplishtheseexpectations,beliefsorprojectionsdescribedintheforward-lookingstatementscontainedherein.Actualandfutureresultsandtrendscoulddiffermateriallyfromthosesetforthinsuchstatements.

Importantfactorsthat,inOceanRig’sview,couldcauseactualresultstodiffermateriallyfromthosediscussedintheforward-lookingstatementsinclude(i)factorsrelatedtotheoffshoredrillingmarket,includingsupplyanddemand,utilization,dayratesandcustomerdrillingprograms;(ii);hazardsinherentinthedrillingindustryandmarineoperationscausingpersonalinjuryorlossoflife,severedamagetoordestructionofpropertyandequipment,pollutionorenvironmentaldamage,claimsbythirdpartiesorcustomersandsuspensionofoperations;(iii)changesinlawsandgovernmentalregulations,particularlywithrespecttoenvironmentalmatters;(iv)theavailabilityofcompetingoffshoredrillingvessels;(v)politicalandotheruncertainties,includingrisksofterroristacts,warandcivildisturbances;piracy;significantgovernmentalinfluenceovermanyaspectsoflocal economies,seizure;nationalizationorexpropriationofpropertyorequipment;repudiation,nullification,modificationorrenegotiationofcontracts;limitationsoninsurancecoverage,suchaswarriskcoverage,incertainareas;politicalunrest;foreignandU.S.monetarypolicyandforeigncurrencyfluctuationsanddevaluations;theinabilitytorepatriateincomeorcapital;complicationsassociatedwithrepairingandreplacingequipmentinremotelocations;import-exportquotas,wageandpricecontrolsimpositionoftradebarriers;regulatoryorfinancialrequirementstocomplywithforeignbureaucraticactions;changingtaxationpolicies;andotherformsofgovernmentregulationandeconomicconditionsthatarebeyondourcontrol;(vi)theperformanceofourrigs;(vii)ourabilitytoprocureorhaveaccesstofinancingandcomplywithourloancovenants;(viii)ourabilitytosuccessfullyemployourdrillingunits;(ix)ourcapitalexpenditures,includingthetimingandcostofcompletionofcapitalprojects;and(x)ourrevenuesandexpenses.Duetosuchuncertaintiesandrisks,investorsarecautionednottoplaceunduerelianceuponsuchforward-lookingstatements.

Contact:

InvestorRelations/Media:

Nicolas Bornozis

CapitalLink,Inc.(NewYork) Tel.212-661-7566

E-mail: