| SECURON (AMERSHAM) LIMITED | Motor vehicles and parts | 1947 | Full accounts |
| NON-SAG SEATING COMPANY LIMITED | Other manufacturing | 1948 | Total exemption (full) |
| NASHTAL AND COMPANY LIMITED | Printing and recorded media | 1948 | Small company accounts |
| PANDECT INSTRUMENT LABORATORIES LIMITED | Computers, electronics and optics | 1954 | Total exemption (full) |
| DRAYCAST FOUNDRIES LIMITED | Basic metals | 1964 | Total exemption (full) |
| FOAM ENGINEERS LIMITED | Other manufacturing | 1965 | Total exemption (full) |
| THE CHILTERN LIFT COMPANY LIMITED | Repair and installation of machinery | 1973 | Total exemption (full) |
| PRINTING AND GRAPHIC MACHINERY INSTALLATIONS LIMITED | Repair and installation of machinery | 1980 | Total exemption (full) |
| EURAM CHEMICALS LIMITED | Chemicals | 1986 | Total exemption (full) |
| LUCAS FLETT HOLDINGS LTD. | Machinery and equipment | 1992 | Total exemption (full) |
| WHICH-WOOD JOINERY LIMITED | Furniture | 1993 | Total exemption (full) |
| ACTIVE ENGINEERING (GB) LIMITED | Fabricated metal products | 2003 | Total exemption (full) |
| I M IMPY LIMITED | Machinery and equipment | 2003 | Total exemption (full) |
| R1 PRINT AND DESIGN LTD | Printing and recorded media | 2004 | Total exemption (full) |
| CARTER DUCTWORK LIMITED | Repair and installation of machinery | 2005 | Total exemption (full) |
| M. R. S. TRANSFERS LIMITED | Printing and recorded media | 2006 | Total exemption (full) |