| Name | Company Number | Date Appointed | Rating |
|---|---|---|---|
| Ross Offshore (U K) Ltd | 02594321 | 30/09/1997 | Dissolved |
| Sedco Forex Offshore International N.V. | SF000831 | 02/01/2001 | Dissolved |
| Sedco Forex Offshore International N.V. | SF000831 | 02/01/2001 | Dissolved |
| Shelf Drilling Ltd | 01515543 | 30/09/1997 | Dissolved |
| Transnor Rig Ltd | 02573756 | 30/09/1997 | Dissolved |
| Transocean Kan Tan Ltd | 03181992 | 30/09/1997 | Dissolved |
| Wilrig (U K) Ltd | 01949869 | 30/09/1997 | Dissolved |
| Wilrig Holdings (U K) Ltd | 02004151 | 30/09/1997 | Dissolved |
| Name | Company Number | Date Appointed | Date Resigned | Rating |
|---|---|---|---|---|
| R&B FALCON (CALEDONIA) LIMITED | 01591065 | 31/01/2001 | 01/07/2008 | Amber |
| R&B FALCON (CALEDONIA) LIMITED | 01591065 | 31/01/2001 | 23/10/2007 | Amber |
| R&B FALCON (U.K.) LIMITED | 01731764 | 31/01/2001 | 01/07/2008 | Amber |
| R&B FALCON (U.K.) LIMITED | 01731764 | 31/01/2001 | 23/10/2007 | Amber |
| SDS OFFSHORE LIMITED | 01822670 | 30/09/1997 | 23/10/2007 | Dissolved |
| TRANSOCEAN DRILLING LIMITED | SC129333 | 30/09/1997 | 05/01/2005 | Dissolved |
| TRANSOCEAN OFFSHORE DRILLING LIMITED | 02571878 | 10/03/2000 | 01/01/2001 | Dissolved |
| TRANSOCEAN OFFSHORE DRILLING LIMITED | 02571878 | 10/03/2000 | 01/01/2001 | Dissolved |
| TRANSOCEAN SERVICES UK LIMITED | 02506922 | 30/09/1997 | 08/02/2007 | Dissolved |
| TRANSOCEAN UK LIMITED | 04017574 | 10/03/2004 | 01/07/2008 | Silver |
| TRANSOCEAN UK LIMITED | 04017574 | 06/11/2000 | 12/10/2005 | Silver |
| Target Drilling Services U K Ltd | 02219209 | 30/09/1997 | 23/08/1999 | Dissolved |
| WILRIG OFFSHORE (UK) LIMITED | 01913362 | 30/09/1997 | 23/10/2007 | Dissolved |