| Name | Company Number | Date Appointed | Rating |
|---|---|---|---|
| Combined Sciences Co Ltd | 00986817 | 01/09/1998 | Dissolved |
| Essex Water Treatment Services Ltd | 01702136 | 01/09/1998 | Dissolved |
| Jay Technical Services Ltd | 02910396 | 01/09/1998 | Dissolved |
| L.I.P. (Process Services) Limited | 01505436 | 01/09/1998 | Dissolved |
| Protean Share Ownership Scheme Trustees Ltd | 02489315 | 01/09/1998 | Dissolved |
| TRIBOTICS LIMITED | 02137588 | 01/09/1998 | Dissolved |
| Techne Scientific Ltd | 01720999 | 01/09/1998 | Dissolved |
| Thermal Elements Ltd | 01997312 | 01/09/1998 | Dissolved |
| Name | Company Number | Date Appointed | Date Resigned | Rating |
|---|---|---|---|---|
| AQUA-DIAL LIMITED | 01680115 | 06/11/1997 | 09/12/2005 | Gold |
| Axholme Resources Ltd | 02991357 | 11/02/1999 | 30/09/2002 | Dissolved |
| BAYHALL (U.K.) LIMITED | 02343796 | 17/04/2001 | 09/12/2005 | Dissolved |
| BWL (RACING) INVEST LIMITED | 01780077 | 10/06/1997 | 09/12/2005 | Gold |
| BWT UK LIMITED | 01386074 | 06/06/1997 | 09/12/2005 | Silver |
| BWT UK PENSION TRUSTEES LIMITED | 05320528 | 23/12/2004 | 09/12/2005 | Dissolved |
| Bayhall (West Yorkshire) Ltd | 03835764 | 17/04/2001 | 09/12/2005 | Dissolved |
| CARBOLITE GERO LIMITED | 01371507 | 01/09/1998 | 31/07/2001 | Silver |
| CARBOLITE OVENS LIMITED | 02265766 | 01/09/1998 | 31/07/2001 | Dissolved |
| CHROMACOL LIMITED | 00962392 | 01/09/1998 | 05/10/2001 | Amber |
| CULLIGAN (GB) LIMITED | 05229188 | 13/06/2005 | 09/12/2005 | Dissolved |
| Culligan Anglia Ltd | 03095171 | 01/01/1998 | 09/12/2005 | Dissolved |
| Culligan London Ltd | 03095170 | 01/01/1998 | 09/12/2005 | Dissolved |
| D.A. Baldwin (Water Treatment) Ltd | 02373024 | 01/09/1998 | 29/11/2004 | Dissolved |
| EPSOM GLASS INDUSTRIES LIMITED | 02759174 | 01/09/1998 | 05/10/2001 | Bronze |
| Enterprise Valve Co Ltd | 03209655 | 10/06/1997 | 09/12/2005 | Dissolved |
| Everpure Sub Ltd | 01433725 | 27/04/2000 | 31/12/2003 | Dissolved |
| JENWAY LIMITED | 01119693 | 01/09/1998 | 31/07/2001 | Dissolved |
| L. I. P. (EQUIPMENT AND SERVICES) LIMITED | 01114459 | 01/09/1998 | 31/07/2001 | Dissolved |
| LENTON THERMAL DESIGNS LIMITED | 01263305 | 01/09/1998 | 31/07/2001 | Dissolved |
| LIFF HOLDINGS LIMITED | 02348485 | 17/04/2001 | 09/12/2005 | Gold |
| Liff Industries (Southern) Ltd | 01623935 | 17/04/2001 | 09/12/2005 | Dissolved |
| Liff Industries Ltd | 01558796 | 17/04/2001 | 09/12/2005 | Dissolved |
| Liff Manufacturing Ltd | 02321206 | 17/04/2001 | 09/12/2005 | Dissolved |
| M & E Water Ltd | 03715961 | 31/03/2000 | 09/12/2005 | Dissolved |
| Manor House Residential Home Ltd | 01873545 | 22/09/1991 | 06/05/2004 | Dissolved |
| Orderclear Ltd | 03352687 | 06/11/1997 | 09/12/2005 | Dissolved |
| PROTEAN (OVERSEAS) HOLDINGS LTD. | 01580114 | 01/09/1998 | 29/11/2004 | Dissolved |
| PROTEAN (UK) HOLDINGS LTD. | 02630612 | 01/09/1998 | 29/11/2004 | Dissolved |
| PROTEAN LIMITED | 01829517 | 23/07/1998 | 29/11/2004 | Dissolved |
| Pentair Water Filtration U K Ltd | 02729529 | 01/08/1997 | 30/09/2002 | Dissolved |
| TECHNE (CAMBRIDGE) LIMITED | 00457895 | 01/09/1998 | 31/07/2001 | Dissolved |
| The Classic Water Co Ltd | 02612097 | 23/07/2002 | 09/12/2005 | Dissolved |
| VEOLIA BM LIMITED | 03444526 | 19/12/1997 | 29/11/2004 | Dissolved |
| Veolia C P | 00994571 | 30/01/1998 | 29/11/2004 | Dissolved |
| Watercool Ltd | 02667094 | 22/12/1998 | 09/12/2005 | Dissolved |
| Wittersley Ltd | 03074378 | 01/09/1998 | 29/11/2004 | Dissolved |