| C. & S. (PORT TALBOT) LIMITED | Fabricated metal products | 1959 | Total exemption (full) |
| SANDVIK OSPREY LIMITED | Fabricated metal products | 1974 | Full accounts |
| D R CHEMICALS LIMITED | Chemicals | 1975 | Total exemption (full) |
| C. & S. (NEATH) STEEL SERVICES LIMITED | Basic metals | 1979 | Total exemption (full) |
| I. AND G. ENGINEERING LIMITED | Machinery and equipment | 1979 | Total exemption (full) |
| SAFETY LETTER BOX COMPANY LIMITED | Fabricated metal products | 1986 | Small company accounts |
| LLANELEC PRECISION ENGINEERING COMPANY LIMITED | Machinery and equipment | 1987 | Full accounts |
| SIESTA GROUP LIMITED | Other manufacturing | 1988 | Total exemption (full) |
| SOFIDEL UK LIMITED | Paper and paperboard | 1988 | Full accounts |
| SKELTON-THOMAS ENGINEERING LIMITED | Fabricated metal products | 1989 | Medium company accounts |
| A. WELD LIMITED | Fabricated metal products | 1991 | Total exemption (full) |
| GROUNDHOG (U.K) LIMITED | Fabricated metal products | 1992 | Full accounts |
| EVANS & REID LIMITED | Machinery and equipment | 1992 | Total exemption (full) |
| SUITEGOOD LIMITED | Rubber and plastics | 1994 | Total exemption (full) |
| R & D VENTILATION SYSTEMS LIMITED | Fabricated metal products | 1995 | Total exemption (full) |
| JTEKT AUTOMOTIVE UK LIMITED | Motor vehicles and parts | 1997 | Full accounts |
| WARMAGLAZE HOME IMPROVEMENTS LIMITED | Rubber and plastics | 1998 | Total exemption (full) |
| SEVEN SISTERS SAWMILLS (SHEDS) LIMITED | Wood products | 1999 | Total exemption (full) |
| G P HYDRAULICS LIMITED | Repair and installation of machinery | 2000 | Total exemption (full) |
| FAIRWOOD ENGINEERING LIMITED | Fabricated metal products | 2000 | Total exemption (full) |
| MACE INTERIORS UK LIMITED | Furniture | 2002 | Total exemption (full) |
| SKEWEN JOINERY SERVICES CO LTD | Wood products | 2003 | Total exemption (full) |
| EGL PURACITE LIMITED | Other manufacturing | 2003 | Small company accounts |
| LA CREME PATISSERIE & CATERING CO. LTD | Food products | 2005 | Total exemption (full) |
| LAKER ELECTRICAL SERVICES LTD | Repair and installation of machinery | 2006 | Total exemption (full) |
| TRT WELDING SERVICES LIMITED | Fabricated metal products | 2006 | Total exemption (full) |
| LLANELEC HOLDINGS LIMITED | Fabricated metal products | 2008 | Group accounts |
| MCDYER CONTROL SYSTEMS LTD | Electrical equipment | 2009 | Total exemption (full) |
| TORQUE SENSE LTD | Repair and installation of machinery | 2009 | Total exemption (full) |
| SPORTEC EMBROIDERY & PRINTING LIMITED | Textiles | 2010 | Total exemption (full) |