| G.B. ENGINEERING (WALES) LIMITED | Fabricated metal products | 1965 | Total exemption (full) |
| CONTROL GEAR LIMITED | Fabricated metal products | 1973 | Total exemption (full) |
| LINEAR PLASTICS LIMITED | Chemicals | 1974 | Total exemption (full) |
| ZENITH PRINT AND PACKAGING LIMITED | Printing and recorded media | 1979 | Full accounts |
| CONTROL GEAR (FILTRATION) LIMITED | Fabricated metal products | 1980 | Total exemption (full) |
| HI TEC CATHODIC PROTECTION LIMITED | Fabricated metal products | 1990 | Total exemption (full) |
| CONTROL GEAR (GROUP) LIMITED | Other manufacturing | 1992 | Total exemption (full) |
| TAYMEC CLEANING SYSTEMS LIMITED | Other manufacturing | 1992 | Total exemption (full) |
| PULLMAN RAIL LIMITED | Fabricated metal products | 1993 | Full accounts |
| MERLIN ENGINEERING (PONTYPRIDD) LIMITED | Machinery and equipment | 1995 | Total exemption (full) |
| B W M LIMITED | Rubber and plastics | 1996 | Total exemption (full) |
| ALLIED AEROSYSTEMS LIMITED | Repair and installation of machinery | 1997 | Total exemption (full) |
| GRAIG ENVIRONMENTAL RECYCLING SERVICES LIMITED | Basic metals | 1998 | Total exemption (full) |
| H P R SOLUTIONS LIMITED | Repair and installation of machinery | 2000 | Total exemption (full) |
| R & P WINDOWS LIMITED | Rubber and plastics | 2002 | Total exemption (full) |
| FIBRE COMPONENTS LIMITED | Paper and paperboard | 2003 | Total exemption (full) |
| QUARK ELECTRONICS LTD. | Machinery and equipment | 2003 | Total exemption (full) |
| LONDON COM LIMITED | Clothing | 2003 | Total exemption (full) |
| GWYNT Y DDRAIG CIDER LTD | Beverages | 2004 | Total exemption (full) |
| G BRIDGES WELDING & PLATING LTD | Fabricated metal products | 2006 | Total exemption (full) |
| EXPRESS DESIGN & PRINT LIMITED | Printing and recorded media | 2006 | Total exemption (full) |
| WINDOOR MATE LIMITED | Rubber and plastics | 2007 | Total exemption (full) |
| SCISSOR BROTHERS LIMITED | Fabricated metal products | 2008 | Total exemption (full) |
| DIGILITH LTD | Printing and recorded media | 2009 | Total exemption (full) |