| Name | Company Number | Date Appointed | Rating |
|---|
| Name | Company Number | Date Appointed | Date Resigned | Rating |
|---|---|---|---|---|
| BORAX CONSOLIDATED LIMITED | 00520502 | 12/02/2007 | 31/03/2010 | Dissolved |
| BORAX EUROPE LIMITED | 00036374 | 01/10/2008 | 31/03/2010 | Bronze |
| BORAX HOLDINGS LIMITED | 01328429 | 12/02/2007 | 31/03/2010 | Dissolved |
| BORAX INTERNATIONAL LIMITED | 00561467 | 12/02/2007 | 31/03/2010 | Dissolved |
| BORAX LIMITED | 00179893 | 30/11/1993 | 16/02/1998 | Dissolved |
| BORAX RESEARCH LIMITED | 01311686 | 12/02/2007 | 31/03/2010 | Dissolved |
| CNA UK LIMITED | 00785896 | 29/01/2001 | 31/03/2010 | Dissolved |
| Corani Mining Ltd | 06469705 | 02/05/2008 | 31/03/2010 | Dissolved |
| IMERYS TALC UK HOLDING LIMITED | 01599006 | 01/01/2000 | 31/03/2010 | Gold |
| KENNECOTT LIMITED | 00646738 | 30/11/2004 | 31/03/2010 | Dissolved |
| LUZENAC MICRO MILLING LIMITED | 00929894 | 07/03/2008 | 31/03/2010 | Dissolved |
| LUZENAC UK LIMITED | 01315243 | 01/05/2008 | 31/03/2010 | Dissolved |
| MANDOVAL COATINGS LIMITED | 01769070 | 31/12/2006 | 31/03/2010 | Dissolved |
| PALABORA EUROPE LIMITED | 00391060 | 01/06/2006 | 31/03/2010 | Gold |
| RIO TINTO BAHIA HOLDINGS LIMITED | 01338672 | 29/06/2004 | 31/03/2010 | Gold |
| RIO TINTO BRAZILIAN HOLDINGS LIMITED | 04986803 | 18/12/2003 | 31/03/2010 | Dissolved |
| RIO TINTO BRAZILIAN INVESTMENTS LIMITED | 04986798 | 18/12/2003 | 31/03/2010 | Dissolved |
| RIO TINTO COMMERCIAL SERVICES LIMITED | 00984764 | 27/08/2009 | 31/03/2010 | Dissolved |
| RIO TINTO ESTATES LIMITED | 00117615 | 01/01/2000 | 31/03/2010 | Dissolved |
| RIO TINTO FINANCE & EXPLORATION PLC | 00541213 | 30/10/2009 | 31/03/2010 | Dissolved |
| RIO TINTO INDIA LIMITED | 03074671 | 17/08/2009 | 31/03/2010 | Dissolved |
| RIO TINTO INDONESIAN HOLDINGS LIMITED | 03074852 | 13/01/2000 | 31/03/2010 | Gold |
| RIO TINTO LIHIR HOLDINGS LIMITED | 03010975 | 13/01/2000 | 31/03/2010 | Dissolved |
| RIO TINTO MARKETING SERVICES LIMITED | 03075230 | 29/06/2009 | 31/03/2010 | Dissolved |
| RIO TINTO MINERALS LIMITED | 01523652 | 15/11/2007 | 31/03/2010 | Dissolved |
| RIO TINTO NICKEL LIMITED | 06131322 | 28/02/2007 | 31/03/2010 | Dissolved |
| RIO TINTO NOMINEES LIMITED | 01181093 | 01/01/2000 | 31/03/2010 | Not Trading |
| RIO TINTO OVERSEAS SERVICES LIMITED | 01026288 | 28/09/2004 | 31/03/2010 | Dissolved |
| RIO TINTO PACIFIC HOLDINGS LIMITED | 00245487 | 29/06/2004 | 31/03/2010 | Dissolved |
| RIO TINTO PENSION INVESTMENTS LIMITED | 01776943 | 23/05/2007 | 31/03/2010 | Dissolved |
| RIO TINTO RESOURCES LIMITED | 00744135 | 21/05/2007 | 31/03/2010 | Dissolved |
| RIO TINTO TECHNICAL SERVICES LIMITED | 01739682 | 22/12/2006 | 31/03/2010 | Dissolved |
| RIO TINTO TECHNOLOGY DEVELOPMENT LIMITED | 00221805 | 22/12/2006 | 31/03/2010 | Dissolved |
| RIO TINTO TRUSTEES LIMITED | 01184351 | 01/01/2000 | 31/03/2010 | Dissolved |
| RTLDS UK LIMITED | 04360048 | 24/01/2002 | 31/03/2010 | Not Trading |
| RTZ MINING & METALS LIMITED | 00932630 | 12/02/2009 | 31/03/2010 | Dissolved |
| Rio Tinto China Exploration Ltd | 05266420 | 11/09/2008 | 31/03/2010 | Dissolved |
| THOS W WARD LIMITED | 00081020 | 01/09/1999 | 31/03/2010 | Gold |
| TINTO INVESTMENTS EUROPE LIMITED | 01414986 | 13/01/2000 | 31/03/2010 | Dissolved |
| Zirconia Sales (U.K.) Ltd | 01924548 | 31/12/2006 | 31/03/2010 | Dissolved |