| Name | Company Number | Date Appointed | Rating |
|---|---|---|---|
| Botan Ltd | 00429595 | 01/08/1994 | Dissolved |
| Dramwell Ltd | 02141612 | 01/08/1994 | Dissolved |
| Dyvell Healthcare Limited | 02829561 | 09/07/1996 | Dissolved |
| Dyvell Medical Services Limited | 02855054 | 09/07/1996 | Dissolved |
| Dyvell Services Ltd | 02635614 | 09/07/1996 | Dissolved |
| Esmil Ltd | 02406558 | 01/08/1994 | Dissolved |
| Fospur International Ltd | 00253582 | 01/08/1994 | Dissolved |
| Global Opd Ltd | 01715640 | 25/04/1995 | Dissolved |
| Swivelcross Ltd | 02462855 | 01/10/1993 | Dissolved |
| Themerecord Ltd | 02560186 | 01/08/1994 | Dissolved |
| Trackturn Ltd | 01884295 | 01/08/1994 | Dissolved |
| Verticam Ltd | 02354952 | 10/05/1993 | Dissolved |
| White Rose Clinical Services Ltd | 02179253 | 10/05/1993 | Dissolved |
| Y W Enterprises Ltd | 02180734 | 01/11/1993 | Dissolved |
| Name | Company Number | Date Appointed | Date Resigned | Rating |
|---|---|---|---|---|
| BESTSELECTION LIMITED | 04085933 | 19/12/2000 | 07/05/2002 | Dissolved |
| DYVELL (HOLDINGS) LIMITED | 02531375 | 09/07/1996 | 21/12/2000 | Dissolved |
| DYVELL INCINERATION SERVICES LIMITED | 02858330 | 09/07/1996 | 21/12/2000 | Dissolved |
| DYVELL LIMITED | 02618679 | 09/07/1996 | 21/12/2000 | Dissolved |
| DYVELL WASTE CARE LIMITED | 02847513 | 09/07/1996 | 21/12/2000 | Dissolved |
| EVANS HOMES (SKELTON) NO.2 LIMITED | 04125370 | 18/10/2001 | 09/09/2003 | Bronze |
| FEATUREPACK LIMITED | 03480237 | 20/03/1998 | 31/07/1998 | Dissolved |
| KELDA GROUP PENSION TRUSTEES LIMITED | 03309639 | 29/10/2015 | 31/12/2020 | Not Trading |
| KELDA GROUP SHARE SCHEME TRUSTEES LIMITED | 02404390 | 30/09/1992 | 29/08/2003 | Dissolved |
| KELDA LIMITED | 02179230 | 10/05/1993 | 29/08/2003 | Gold |
| KELDA WATER SERVICES LIMITED | 02180706 | 10/05/1993 | 30/09/1994 | Gold |
| KEYLAND DEVELOPMENTS LIMITED | 02180728 | 10/05/1993 | 30/09/1994 | Silver |
| YORKSHIRE WATER ESTATES LIMITED | 03174657 | 03/09/2002 | 29/08/2003 | Dissolved |
| YORKSHIRE WATER FIRST FINANCE LIMITED | 02180720 | 10/05/1993 | 25/11/1997 | Dissolved |
| YORKSHIRE WATER LIMITED | 03778498 | 28/05/1999 | 29/08/2003 | Not Trading |
| YORKSHIRE WATER PROJECTS LIMITED | 03028361 | 03/09/2002 | 29/08/2003 | Dissolved |
| Yorkshire Water (China) Ltd | 02354948 | 10/05/1993 | 10/09/1993 | Dissolved |