| VIBRATECHNIQUES LIMITED | Machinery and equipment | 1962 | Small company accounts |
| O.M.K. DESIGN LIMITED | Furniture | 1964 | Total exemption (full) |
| PYROBAN LIMITED | Machinery and equipment | 1978 | Full accounts |
| PRECISION METAL PRODUCTS LIMITED | Fabricated metal products | 1982 | Total exemption (full) |
| DATASHARP UK LIMITED | Repair and installation of machinery | 1984 | Audit-exempt subsidiary |
| ALIPORT LIMITED | Other manufacturing | 1984 | Total exemption (full) |
| VOICE CONNECT LIMITED | Computers, electronics and optics | 1992 | Audit-exempt subsidiary |
| RICARDO UK LIMITED | Machinery and equipment | 1993 | Full accounts |
| JWS EUROPE LTD | Other manufacturing | 1994 | Total exemption (full) |
| FIRETOYS LIMITED | Fabricated metal products | 2002 | Total exemption (full) |
| LES HONESS SOUND SERVICES LTD | Printing and recorded media | 2003 | Unaudited abridged |
| SOUND SOLUTIONS PRODUCTS LIMITED | Other manufacturing | 2004 | Total exemption (full) |
| COX POWERTRAIN LIMITED | Machinery and equipment | 2005 | Group accounts |