| Name | Company Number | Date Appointed | Rating |
|---|---|---|---|
| 00226599 LIMITED | 00226599 | 09/07/1992 | Dissolved |
| 00250700 LIMITED | 00250700 | 18/11/1991 | Dissolved |
| A 1 Petrochemicals Ltd | 00951057 | 08/06/1991 | Dissolved |
| A C FABRICATIONS & PIPEWORK (PETROCHEMICALS) LIMITED | 00469269 | 08/06/1991 | Not Trading |
| ALDRIDGE HEAT TREATMENT LIMITED | 00503286 | 08/06/1991 | Not Trading |
| Airtech Fan Coils Limited | 00304978 | 08/06/1991 | Dissolved |
| Compoflex Co Ltd | 00809451 | 08/06/1991 | Dissolved |
| Cotswold Heat Treatment Services Ltd | 01325883 | 08/06/1991 | Dissolved |
| DURHAM TUBE LIMITED | SC038309 | 01/08/1990 | Dissolved |
| Green's Economiser Limited | 00529770 | 08/06/1991 | Dissolved |
| Guthrie Adams (Heat Treatment) Ltd | 00666247 | 08/06/1991 | Dissolved |
| Ideal Tubes and Conduits Ltd | 00588494 | 08/06/1991 | Dissolved |
| Luton Heat Treatment Co Ltd | 00729655 | 06/11/1991 | Dissolved |
| Phoenix Drawn Tube Ltd | 02158875 | 16/12/1991 | Dissolved |
| Phoenix Flexible Tubes Ltd | 01253093 | 08/06/1991 | Dissolved |
| Precision Heat Treatment Ltd | 00524695 | 08/06/1991 | Dissolved |
| Premier Tubes Ltd | 01235461 | 08/06/1991 | Dissolved |
| R.F. Luke (Structural Steelwork) Ltd | 00517769 | 08/06/1991 | Dissolved |
| SENIOR ECONOMISERS LIMITED | 00873143 | 08/06/1991 | Dissolved |
| SENIOR PRECISION MACHINES LIMITED | 00513893 | 30/07/1993 | Dissolved |
| Senior Acoustic & Air Distribution (S D F) Ltd | 01171511 | 31/03/1993 | Dissolved |
| Senior Airo Products (Wb) Ltd | 01235459 | 08/06/1991 | Dissolved |
| Senior Construction Services (Prs) Ltd | 00898428 | 30/11/1992 | Dissolved |
| Senior Green Boilers Ltd | 00629823 | 08/06/1991 | Dissolved |
| Senior Heat Exchangers Limited | 01257348 | 08/06/1991 | Dissolved |
| Senior Platecoil Ltd | 00867561 | 08/06/1991 | Dissolved |
| Senior Swiftair (D D) Ltd | 00066606 | 08/06/1991 | Dissolved |
| Senior Tift Ltd | 00327495 | 08/06/1991 | Dissolved |
| T E E (Heat Treatment) Ltd | 00949576 | 16/08/1994 | Dissolved |
| T P Manipulations (R M C) Ltd | 00503173 | 08/06/1991 | Dissolved |
| THE PHOENIX STEEL TUBE COMPANY LIMITED | 00766457 | 08/06/1991 | Dissolved |
| The Applied Heat Company Ltd | 00360984 | 08/06/1992 | Dissolved |
| Trg Associates Ltd | 04107293 | 14/11/2000 | Dissolved |
| United Flexible Metallic Tube Co Ltd | 00592510 | 08/06/1991 | Dissolved |
| Name | Company Number | Date Appointed | Date Resigned | Rating |
|---|---|---|---|---|
| 00026461 LIMITED | 00026461 | 08/06/1991 | 15/08/2000 | Strike Off |
| ATLAS COMPOSITES LIMITED | 01981314 | 08/06/1991 | 15/08/2000 | Not Trading |
| Baxter Woodhouse & Taylor Ltd | 00069453 | 17/09/1999 | 15/08/2000 | Dissolved |
| Bird Precision Bellows Ltd | 01221634 | 17/09/1999 | 15/08/2000 | Dissolved |
| Cork Industries Ltd | 03211881 | 17/09/1999 | 15/08/2000 | Dissolved |
| FELLCREST LIMITED | 02526941 | 17/09/1999 | 15/08/2000 | Dissolved |
| FLEXONICS LIMITED | 02861142 | 23/12/1993 | 15/08/2000 | Not Trading |
| Green,E,& Son (Castings) Ltd | 00138099 | 08/06/1991 | 15/08/2000 | Dissolved |
| HENRY HARGREAVES & SONS LIMITED | 00543146 | 08/06/1991 | 15/08/2000 | Dissolved |
| Hamsard One Thousand & Sixty Four Ltd | 03447395 | 17/09/1999 | 15/08/2000 | Dissolved |
| Le Bas Tube Co Ltd | 00919629 | 08/06/1991 | 15/08/2000 | Dissolved |
| M&W GRAZEBROOK LIMITED | 00942355 | 15/09/1992 | 15/08/2000 | Strike Off |
| NITROTEC LIMITED | 00825606 | 30/11/1992 | 15/08/2000 | Dissolved |
| Paragon Group Ltd | 01855978 | 15/09/1995 | 15/08/2000 | Dissolved |
| RENISHAW P L C | 01106260 | 01/07/2003 | 18/10/2012 | Gold |
| RUBIX GROUP INTERNATIONAL LIMITED | 00162925 | 01/06/2004 | 15/05/2015 | Amber |
| SENIOR AEROSPACE LIMITED | 01127979 | 08/06/1991 | 15/08/2000 | Not Trading |
| SENIOR AUTOMOTIVE LIMITED | 01997380 | 08/06/1991 | 15/08/2000 | Not Trading |
| SENIOR CONTROL ENGINEERING LTD. | 00440221 | 12/08/1993 | 15/08/2000 | Dissolved |
| SENIOR ENGINEERING (FINANCE) LIMITED | 01997378 | 08/06/1991 | 15/08/2000 | Dissolved |
| SENIOR ENGINEERING INVESTMENTS LIMITED | 00938893 | 08/06/1992 | 15/08/2000 | Gold |
| SENIOR FLEXONICS TUBE COMPONENTS LIMITED | 00503492 | 08/06/1991 | 15/08/2000 | Dissolved |
| SENIOR HOLDINGS LIMITED | 00932648 | 08/06/1991 | 19/05/2000 | Dissolved |
| SENIOR INDUSTRIAL PLASTICS LIMITED | 01139744 | 10/06/1994 | 15/08/2000 | Strike Off |
| SENIOR OPERATIONS LIMITED | 00953650 | 08/06/1991 | 15/08/2000 | Dissolved |
| SENIOR PLC | 00282772 | 08/06/1992 | 15/08/2000 | Gold |
| SENIOR POWER PRODUCTS LIMITED | 00608590 | 09/07/1992 | 15/08/2000 | Not Trading |
| SENIOR TRUSTEE LIMITED | 01997379 | 08/06/1991 | 15/08/2000 | Not Trading |
| SENIOR UK LIMITED | 01928053 | 08/06/1991 | 17/08/1992 | Bronze |
| Senior Control Engineering (No 5) Ltd | 00425659 | 17/09/1991 | 15/08/2000 | Dissolved |
| Senior Control Engineering (No.3) Limited | 00327959 | 08/06/1991 | 15/08/2000 | Dissolved |
| Senior Control Engineering (No.4) Limited | 00208089 | 08/06/1991 | 15/08/2000 | Dissolved |
| Senior Engineering (Littleborough) Ltd | 01397634 | 08/06/1991 | 15/08/2000 | Dissolved |
| Stovestile Ltd | 01898968 | 08/06/1991 | 15/08/2000 | Dissolved |
| THE DISABILITY RESOURCE CENTRE | 02898000 | 18/06/2003 | 31/10/2011 | Silver |
| TUBE COMPONENTS LIMITED | 01059437 | 08/06/1991 | 15/08/2000 | Dissolved |
| The Power Flexible Tubing Company Ltd | 00151983 | 08/06/1991 | 19/05/2000 | Dissolved |
| Thermal Efficiency Ltd | 00515732 | 08/06/1991 | 15/08/2000 | Dissolved |
| WILMINGTON PLC | 03015847 | 15/06/2005 | 05/11/2015 | Gold |