| | | | |
| Name of Subsidiary | | Jurisdiction of Incorporation | | |
Drill Rigs Holdings Inc. | | Marshall Islands | | |
Ocean Rig 1 Shareholders Inc. | | Marshall Islands | | |
Ocean Rig 1 Inc. | | Marshall Islands | | |
Ocean Rig 1 Greenland Operations Inc. | | Marshall Islands | | |
Ocean Rig Falkland Operations Inc. | | Marshall Islands | | |
Ocean Rig West Africa Operations Inc. | | Marshall Islands | | |
Ocean Rig 2 Shareholders Inc | | Marshall Islands | | |
Ocean Rig 2 Inc. | | Marshall Islands | | |
Drill Rigs Operations Inc. | | Marshall Islands | | |
Ocean Rig EG Operations Inc. | | Marshall Islands | | |
Ocean Rig Norway Operations Inc | | Marshall Islands | | |
Ocean Rig Liberia Operations Inc. | | Marshall Islands | | |
Ocean Rig Ireland Operations Inc. | | Marshall Islands | | |
Drillships Holdings Inc. | | Marshall Islands | | |
Drillship Hydra Shareholders Inc. | | Marshall Islands | | |
Drillship Hydra Owners Inc. | | Marshall Islands | | |
Ocean Rig Corcovado Greenland Operations Inc. | | Marshall Islands | | |
Drillship Paros Shareholders Inc. | | Marshall Islands | | |
Drillship Paros Owners Inc. | | Marshall Islands | | |
Drillships Holdings Operations Inc. | | Marshall Islands | | |
Ocean Rig Angola Operations Inc. | | Marshall Islands | | |
Ocean Rig Gabon Operations Inc. | | Marshall Islands | | |
Drillships Investment Inc. | | Marshall Islands | | |
Kithira Shareholders Inc. | | Marshall Islands | | |
Drillship Kithira Owners Inc. | | Marshall Islands | | |
Ocean Rig Poseidon Operations Inc. | | Marshall Islands | | |
Skopelos Shareholders Inc. | | Marshall Islands | | |
Drillship Skopelos Owners Inc. | | Marshall Islands | | |
Drillships Investment Operations Inc. | | Marshall Islands | | |
Ocean Rig Namibia Operations Inc. | | Marshall Islands | | |
Ocean Rig Cuanza Operations Inc. | | Marshall Islands | | |
Drillships Ocean Ventures Inc. | | Marshall Islands | | |
Drillship Skiathos Shareholders Inc. | | Marshall Islands | | |
Drillship Skiathos Owners Inc. | | Marshall Islands | | |
Drillship Skyros Shareholders Inc. | | Marshall Islands | | |
Drillship Skyros Owners Inc. | | Marshall Islands | | |
Drillship Kythnos Shareholders Inc. | | Marshall Islands | | |
Drillship Kythnos Owners Inc. | | Marshall Islands | | |
Drillships Ocean Ventures Operations Inc. | | Marshall Islands | | |
Ocean Rig Cunene Operations Inc. | | Marshall Islands | | |
Ocean Rig Cubango Operations Inc. | | Marshall Islands | | |
Ocean Rig Operations Inc. | | Marshall Islands | | |
Ireland Drilling Crew Inc. | | Marshall Islands | | |
| | | | |
| Name of Subsidiary | | Jurisdiction of Incorporation | | |
Drillships Financing Holding Inc. | | Marshall Islands | | |
Alley Finance Co. | | Marshall Islands | | |
Algarve Finance Ltd | | Marshall Islands | | |
Ocean Rig Global Chartering Inc. | | Marshall Islands | | |
Drillship Alonissos Shareholders Inc. | | Marshall Islands | | |
Drillship Alonissos Owners Inc. | | Marshall Islands | | |
Ocean Rig Management Inc. | | Marshall Islands | | |
Eastern Med Consultants Inc. | | Marshall Islands | | |
Ocean Rig Spares Inc. | | Marshall Islands | | |
Bluesky Shareholders Inc. | | Marshall Islands | | |
Bluesky Owners Inc. | | Marshall Islands | | |
Ocean Rig Black Sea Cooperatief U.A. | | Netherlands | | |
Ocean Rig Black Sea Operations B.V. | | Netherlands | | |
Ocean Rig Drilling Operations Cooperatief U.A. | | Netherlands | | |
Ocean Rig Drilling Operations B.V. | | Netherlands | | |
Ocean Rig Block 33 Brasil Cooperatief U.A. | | Netherlands | | |
Ocean Rig Block 33 Brasil B.V. | | Netherlands | | |
Ocean Rig Ghana Limited | | Ghana | | |
Ocean Rig Olympia Operations Ghana Limited | | Ghana | | |
Primelead Limited | | Cyprus | | |
Ocean Rig UDW LLC | | U.S. | | |
Drillships Projects Inc. | | Delaware, U.S. | | |
Ocean Rig Canada Inc. | | Canada | | |
Ocean Rig North Sea AS | | Norway | | |
Ocean Rig AS | | Norway | | |
Ocean Rig UK Limited | | UK | | |
Ocean Rig Limited | | UK | | |
Olympia Rig Angola Holding S.A. | | Angola | | |
Olympia Rig Angola Limitada | | Angola | | |
Ocean Rig Deepwater Drilling Limited | | Nigeria | | |
Ocean Rig do Brasil Servicos de Petroleo Ltda. | | Brazil | | |
Ocean Rig Drilling do Brasil Servicos de Petroleo Ltda. | | Brazil | | |
Ocean Rig Rio de Janeiro Servicos de Petroleo Ltda. | | Brazil | | |
Ocean Rig Offshore Management Limited | | Jersey | | |
OR Crewing Limited | | Jersey | | |
OCR Falklands Drilling Inc. | | Marshall Islands | | |
Drillships Ventures Projects Inc. | | Delaware, U.S. | | |
South Africa Drilling Crew Inc. | | Marshall Islands | | |
Ocean Rig Congo Operations Inc. | | Marshall Islands | | |
OR Global Block Operators Inc. | | Marshall Islands | | |
Drillship Santorini Shareholders Inc. | | Marshall Islands | | |
Drillship Santorini Owners Inc. | | Marshall Islands | | |
Drillship Crete Shareholders Inc. | | Marshall Islands | | |
Drillship Crete Owners Inc. | | Marshall Islands | | |
Drillship Amorgos Shareholders Inc. | | Marshall Islands | | |
Drillship Amorgos Owners Inc. | | Marshall Islands | | |
OR Benguela Operations Inc. | | Marshall Islands | | |
