| ALLENFIELD PRECISION ENGINEERING LIMITED | Machinery and equipment | 1965 | Total exemption (full) |
| APPLIED MICROENGINEERING LIMITED | Machinery and equipment | 1992 | Total exemption (full) |
| SPICE APPLICATION SYSTEMS LIMITED | Computers, electronics and optics | 1999 | Total exemption (full) |
| ORANGE TREE TECHNOLOGIES LIMITED | Computers, electronics and optics | 2001 | Total exemption (full) |
| THAMES CRYOGENICS LIMITED | Fabricated metal products | 2003 | Small company accounts |
| WIKA OPTICAL SENSING LIMITED | Computers, electronics and optics | 2003 | Small company accounts |
| DIGIPRESS.CO LIMITED | Printing and recorded media | 2004 | Total exemption (full) |
| UNIVERSAL WINDOW REPAIRS LIMITED | Glass, ceramics, cement and stone | 2005 | Total exemption (full) |
| QUINTON MAINTENANCE SERVICES LIMITED | Repair and installation of machinery | 2009 | Total exemption (full) |
| P J S DESIGNS LIMITED | Furniture | 2010 | Unaudited abridged |
| TERATECH COMPONENTS LIMITED | Computers, electronics and optics | 2010 | Total exemption (full) |