| Name | Company Number | Date Appointed | Rating |
|---|---|---|---|
| Chemical Packing Co (Acton) Ltd | 00975137 | 08/04/2002 | Dissolved |
| Devon Kaolin Production Co Ltd | 05249200 | 08/10/2004 | Dissolved |
| FEATUREPACK LIMITED | 03480237 | 19/12/2014 | Dissolved |
| Feslente Ltd | 00391748 | 06/04/2002 | Dissolved |
| Fordath Developments Ltd | 01028117 | 06/04/2002 | Dissolved |
| Hinckley Estates Ltd | 00235099 | 06/04/2002 | Dissolved |
| Marshall Foundry Products Ltd | 02125115 | 06/04/2002 | Dissolved |
| Rangeport Ltd | 04568224 | 20/06/2003 | Dissolved |
| THE YORK WATERWORKS LIMITED | 02511298 | 31/12/2014 | Dissolved |
| Wbb Industrial Ceramics Ltd | 00541024 | 06/04/2002 | Dissolved |
| Name | Company Number | Date Appointed | Date Resigned | Rating |
|---|---|---|---|---|
| ARNOLD SANDS LIMITED | 00268850 | 06/04/2002 | 31/07/2008 | Dissolved |
| ASSOCIATED SILICAS LIMITED | 00378505 | 06/04/2002 | 31/07/2008 | Dissolved |
| BLUBBERHOUSES MOOR LIMITED | 02624570 | 15/10/2002 | 31/07/2008 | One Red Flag |
| BRITISH INDUSTRIAL SAND(SCOTLAND)LIMITED | SC023066 | 06/04/2002 | 31/07/2008 | Dissolved |
| DEVON AND COURTENAY CLAY COMPANY,LIMITED(THE) | 00075728 | 21/02/2002 | 31/07/2008 | Dissolved |
| ELECTRICITY NORTH WEST LIMITED | 02366949 | 08/09/2008 | 31/03/2014 | Silver |
| FORDATH LIMITED | 00166352 | 06/04/2002 | 31/07/2008 | Not Trading |
| FORDATH UK LIMITED | 05212563 | 10/09/2004 | 15/03/2005 | Dissolved |
| GLANDWR CYFYNGEDIG | 04154570 | 31/12/2014 | 15/12/2017 | Not Trading |
| KELDA FINANCE (NO.1) LIMITED | 08066326 | 31/12/2014 | 15/12/2017 | Silver |
| KELDA FINANCE (NO.2) LIMITED | 08072102 | 31/12/2014 | 15/12/2017 | Silver |
| KELDA FINANCE (NO.3) PLC | 08270049 | 31/12/2014 | 15/12/2017 | Silver |
| KELDA GROUP LIMITED | 02366627 | 31/12/2014 | 15/12/2017 | Gold |
| KELDA LIMITED | 02179230 | 31/12/2014 | 15/12/2017 | Gold |
| KELDA NON-REG HOLDCO LIMITED | 06433788 | 31/12/2014 | 15/12/2017 | Dissolved |
| LAUNCHMYCAREER HOLDINGS PLC | 11589976 | 21/01/2019 | 10/02/2023 | Insolvent |
| NEWTON ABBOT CLAYS,LIMITED(THE) | 00153429 | 21/02/2002 | 31/07/2008 | Dissolved |
| NORTH DEVON CLAY COMPANY LIMITED | 00038897 | 21/02/2002 | 31/07/2008 | Dissolved |
| RYBURN GALLERY LIMITED | 04952412 | 04/11/2003 | 01/11/2011 | Silver |
| RYBURN GALLERY LIMITED | 04952412 | 04/11/2003 | 16/11/2009 | Silver |
| SAFE-MOVE LIMITED | 04868680 | 31/12/2014 | 15/12/2017 | Not Trading |
| SALTAIRE WATER LIMITED | 06433802 | 31/12/2014 | 15/12/2017 | Bronze |
| SCARCROFT INVESTMENTS LIMITED | 02798178 | 13/10/2000 | 06/11/2000 | Dissolved |
| SIBELCO GREEN SOLUTIONS UK LIMITED | 01009716 | 06/04/2002 | 31/07/2008 | Bronze |
| SIBELCO MINERALS AND CHEMICALS (HOLDINGS) LIMITED | 00495403 | 06/04/2002 | 31/07/2008 | Silver |
| SIBELCO UK LIMITED | 00578631 | 06/04/2002 | 31/07/2008 | Bronze |
| SIBELCO UK LIMITED | 00578631 | 12/03/2008 | 31/07/2008 | Bronze |
| SIBELCO UK OCCUPATIONAL PENSION TRUSTEE LIMITED | 04096204 | 01/04/2007 | 23/07/2008 | Not Trading |
| WATTS BLAKE BEARNE AND COMPANY LIMITED | 00133468 | 21/02/2002 | 31/07/2008 | Silver |
| WATTS BLAKE BEARNE AND COMPANY LIMITED | 00133468 | 12/03/2008 | 31/07/2008 | Silver |
| WBB DEVON CLAYS LIMITED | 02394306 | 21/02/2002 | 31/07/2008 | Dissolved |
| WBB EASTERN EUROPE LIMITED | 02001548 | 21/02/2002 | 31/07/2008 | Amber |
| WBB MINERALS (HOLDINGS) LIMITED | 02169028 | 21/02/2002 | 31/07/2008 | Dissolved |
| WBB TECHNOLOGY LIMITED | 01329637 | 21/02/2002 | 31/07/2008 | Dissolved |
| YORKSHIRE ELECTRICITY GROUP PLC | 02366995 | 30/03/1995 | 21/09/2001 | Silver |
| YORKSHIRE WATER ESTATES LIMITED | 03174657 | 31/12/2014 | 15/12/2017 | Dissolved |
| YORKSHIRE WATER LIMITED | 03778498 | 31/12/2014 | 15/12/2017 | Not Trading |
| YORKSHIRE WATER PROJECTS LIMITED | 03028361 | 31/12/2014 | 15/12/2017 | Dissolved |
| YORKSHIRE WATER SERVICES FINANCE LIMITED | 04636719 | 31/12/2014 | 15/12/2017 | Bronze |
| YORKSHIRE WATER SERVICES HOLDINGS LIMITED | 06815156 | 31/12/2014 | 15/12/2017 | Gold |
| Yorkshire Electricity Group Share Scheme Trustees Ltd | 02525146 | 13/10/2000 | 06/11/2000 | Dissolved |