| Name | Company Number | Date Appointed | Rating |
|---|---|---|---|
| THAMES WATER PENSION TRUSTEES LIMITED | 02228533 | 01/03/2015 | Bronze |
| Name | Company Number | Date Appointed | Date Resigned | Rating |
|---|---|---|---|---|
| Burgess Cast Products Ltd | 01886750 | 26/06/1992 | 18/01/1995 | Dissolved |
| CENTRAL BERKSHIRE EDUCATION BUSINESS PARTNERSHIP | 02860911 | 22/05/2003 | 20/01/2005 | Dissolved |
| CHLORINATION EQUIPMENT LIMITED | 00587683 | 31/10/1994 | 01/01/2000 | Dissolved |
| HAYMILLS ENGINEERING LIMITED | 00148343 | 22/06/1998 | 01/01/2000 | Dissolved |
| MYUTILITY LTD | 03923142 | 01/12/2008 | 08/06/2009 | Dissolved |
| PORTACEL LIMITED | 00273244 | 31/10/1994 | 01/01/2000 | Dissolved |
| QONNECTIS GROUP LTD | 03978642 | 01/05/2000 | 17/04/2003 | Silver |
| QONNECTIS TECHNOLOGIES LIMITED | 03861324 | 01/12/2008 | 08/06/2009 | Dissolved |
| STELLA-META FILTERS LIMITED | 00353449 | 31/10/1994 | 01/01/2000 | Dissolved |
| T M PRODUCTS LIMITED | 00587953 | 23/07/1992 | 01/01/2000 | Dissolved |
| TERRA ECO.SYSTEMS LIMITED | 00278567 | 21/10/1994 | 01/01/2000 | Dissolved |
| THAMES WATER PRODUCTS CASTINGS LTD. | 00316572 | 22/06/1998 | 01/01/2000 | Dissolved |
| THAMES WATER PRODUCTS COATINGS LTD. | 02293482 | 22/06/1998 | 01/01/2000 | Dissolved |
| THAMES WATER PRODUCTS FWT LTD. | 00231986 | 31/10/1994 | 01/01/2000 | Dissolved |
| THAMES WATER PRODUCTS LIMITED | 02249185 | 14/05/1998 | 01/01/2000 | Not Trading |
| THAMES WATER PRODUCTS SGE LTD. | 01147810 | 22/06/1998 | 01/01/2000 | Dissolved |
| THAMES WATER PRODUCTS UPE LIMITED | 02056382 | 22/06/1998 | 01/01/2000 | Dissolved |
| THAMES WATER PRODUCTS UPEI LTD. | 02081406 | 22/06/1998 | 01/01/2000 | Dissolved |
| THAMES WATER UTILITIES LIMITED | 02366661 | 01/01/2000 | 20/09/2001 | Bronze |
| Thames Water Products Upec Ltd. | 02784771 | 22/06/1998 | 01/01/2000 | Dissolved |
| Thames Water Products Upeg Ltd. | 03103572 | 22/06/1998 | 01/01/2000 | Dissolved |
| Thames Water Technologies Ltd | 01131731 | 31/10/1994 | 09/12/1997 | Dissolved |
| VEOLIA WATER OUTSOURCING LIMITED | 02518607 | 05/03/2002 | 05/05/2002 | Gold |
| WATER INTELLIGENCE INTERNATIONAL LTD | 03634838 | 24/03/1999 | 25/10/2004 | One Red Flag |
| WATER INTELLIGENCE PLC | 03923150 | 17/05/2007 | 08/06/2009 | Gold |
| WHITESANDS APARTMENTS LIMITED | 06750053 | 17/11/2008 | 28/02/2017 | Dissolved |