| PICKERING ELECTRONICS LIMITED | Computers, electronics and optics | 1965 | Group accounts |
| PICKERING INTERFACES LIMITED | Computers, electronics and optics | 1971 | Group accounts |
| TITMAN TIP TOOLS LIMITED | Other manufacturing | 1973 | Unaudited abridged |
| DURA COMPOSITES LIMITED | Rubber and plastics | 1996 | Full accounts |
| SCANDIA REFRIGERATION LIMITED | Fabricated metal products | 1997 | Total exemption (full) |
| LENNOX UK LTD | Other manufacturing | 2001 | Total exemption (full) |
| PETTITT ENGINEERING SERVICES LIMITED | Repair and installation of machinery | 2002 | Total exemption (full) |
| THE GARDEN TRELLIS COMPANY LIMITED | Wood products | 2002 | Total exemption (full) |
| CLACTON MOTORIST DISCOUNT LIMITED | Fabricated metal products | 2003 | Total exemption (full) |
| FIELDING ENGINEERING LIMITED | Machinery and equipment | 2003 | Total exemption (full) |
| ANGLIAN VEHICLE LININGS LIMITED | Motor vehicles and parts | 2005 | Total exemption (full) |
| D & F ENGINEERING LIMITED | Repair and installation of machinery | 2005 | Total exemption (full) |
| RJAYS TIMBER LIMITED | Wood products | 2006 | Total exemption (full) |
| PRESTIGE WELDING AND POWDER COATING LTD | Fabricated metal products | 2007 | Total exemption (full) |
| GREEN FROG DESIGNS LIMITED | Rubber and plastics | 2009 | Total exemption (full) |
| ADVANCED NETTING LTD | Other manufacturing | 2010 | Total exemption (full) |
| ELECTRICAL HEATING PLUMBING LTD | Repair and installation of machinery | 2010 | Total exemption (full) |