| Name | Company Number | Date Appointed | Rating |
|---|---|---|---|
| Chapel Fell Ganister Company Limited | 00406028 | 08/08/1991 | Dissolved |
| DIAMOND REFRACTORIES LIMITED | SC017585 | 17/09/1993 | Dissolved |
| HOT D 2002 LTD | 00836777 | 01/05/1997 | One Red Flag |
| Harris & Pearson,Limited | 00258901 | 08/08/1991 | Dissolved |
| Hot C 2002 Ltd | 00443931 | 01/05/1997 | Dissolved |
| Hot F 2002 Ltd | 01319449 | 01/05/1997 | Dissolved |
| Hot Z 2002 Ltd | 01600380 | 01/05/1997 | Dissolved |
| John Stevens (Stourbridge) Limited | 00304962 | 08/08/1991 | Dissolved |
| M & G Tankers Ltd | 01412355 | 03/02/1993 | Dissolved |
| Manor Refractories Ltd | 02175953 | 03/03/2000 | Dissolved |
| Mobberley & Perry Ltd | 00095076 | 08/08/1991 | Dissolved |
| Price-Pearson Holdings Ltd | 00128100 | 08/08/1991 | Dissolved |
| Refractory Clays Limited | 00444656 | 09/08/1991 | Dissolved |
| Refractory Minerals Limited | 00154410 | 08/08/1991 | Dissolved |
| Silica Products Limited | 00158724 | 08/08/1991 | Dissolved |
| Spheridyne Limited | 02705557 | 04/01/1993 | Dissolved |
| The National Federation of Clay Industries Ltd | 00232729 | 20/07/1992 | Dissolved |
| The Yorkshire Testing Works,Limited | 00111463 | 09/08/1991 | Dissolved |
| Timmis & Co.,Limited | 00197359 | 08/08/1991 | Dissolved |
| Webster & Co (Sheffield) Ltd | 00180689 | 08/08/1991 | Dissolved |
| West Hunwick Refractories Limited | 00181059 | 08/08/1991 | Dissolved |
| Name | Company Number | Date Appointed | Date Resigned | Rating |
|---|---|---|---|---|
| Acme Marls Ltd | 02857633 | 28/06/2000 | 21/09/2007 | Dissolved |
| BEEPART LIMITED | 00177682 | 09/08/1991 | 21/09/2007 | Gold |
| BUILDERS CENTRE (SHEFFIELD) LIMITED(THE) | 00624494 | 08/08/1991 | 21/09/2007 | One Red Flag |
| CERAMIC INDUSTRY FORUM | 04073508 | 11/12/2001 | 07/06/2005 | Dissolved |
| Ceramic Holdings Ltd | SC029268 | 08/08/1989 | 17/07/1991 | Dissolved |
| Ceramic Holdings Ltd | SC029268 | 08/08/1989 | 21/09/2007 | Dissolved |
| D.DUDDELL,LIMITED | 00436376 | 08/08/1991 | 21/09/2007 | Dissolved |
| DYSON GROUP PLC | 00163096 | 12/10/1991 | 21/09/2007 | Silver |
| DYSON INDUSTRIES LIMITED | 01187031 | 09/08/1991 | 21/09/2007 | Bronze |
| DYSON TPM LTD | 03327174 | 29/09/1997 | 21/09/2007 | Strike Off |
| DYTECH CORPORATION LIMITED | 02094988 | 08/08/1991 | 21/09/2007 | Dissolved |
| Glass Contact Ltd | 01507371 | 16/04/1992 | 21/01/1994 | Dissolved |
| HI-POR CERAMICS LIMITED | 03472749 | 13/01/1998 | 21/09/2007 | Dissolved |
| HOT H 2002 LTD | 00962291 | 01/05/1997 | 21/09/2007 | Dissolved |
| HOT I 2002 LTD | 02316671 | 01/05/1997 | 21/09/2007 | Dissolved |
| HOT PP 2002 LTD | 00938345 | 01/05/1997 | 21/09/2007 | Dissolved |
| IMCO (62000) LIMITED | 03905626 | 28/02/2000 | 21/09/2007 | Amber |
| INTELPROP LIMITED | 03473033 | 23/01/1998 | 21/09/2007 | Dissolved |
| J & J DYSON LIMITED | 03326984 | 18/04/1997 | 21/09/2007 | Dissolved |
| JOHN KNOWLES & CO (WOODEN BOX) LIMITED | 00096707 | 09/08/1991 | 21/09/2007 | Dissolved |
| PICKFORD,HOLLAND & CO.LIMITED | 00128414 | 09/08/1991 | 21/09/2007 | Gold |
| RESOURCE INTERNATIONAL LIMITED | 02372056 | 25/10/1991 | 16/04/1999 | Gold |
| SAFFIL LIMITED | 03646114 | 22/04/1999 | 21/09/2007 | Bronze |
| SANDYGATE MOTOR SERVICES LIMITED | 00866006 | 08/08/1991 | 01/11/2005 | Dissolved |
| UNIFRAX EMISSION CONTROL EUROPE LTD | 01978805 | 03/03/2000 | 21/09/2007 | One Red Flag |
| Watermeet Ltd | 03112715 | 11/10/1995 | 21/09/2007 | Dissolved |