| PERFORMANCE CHEMICALS LIMITED | Chemicals | 1956 | Total exemption (full) |
| HOME PROTECTION SECURITY GRILLES LIMITED | Fabricated metal products | 1985 | Total exemption (full) |
| AIR TECH D.S. LIMITED | Machinery and equipment | 1993 | Total exemption (full) |
| TURNERS PRODUCTS LTD | Fabricated metal products | 2002 | Total exemption (full) |
| INSTALL AV LIMITED | Repair and installation of machinery | 2003 | Total exemption (full) |
| DRDT CONSTRUCTIONS LIMITED | Wood products | 2005 | Total exemption (full) |
| PRINTLOGIC SOLUTIONS LIMITED | Printing and recorded media | 2007 | Total exemption (full) |
| GLOBAL HARDWARE LIMITED | Other manufacturing | 2007 | Total exemption (full) |
| TWIST PRINT AND DESIGN LTD | Printing and recorded media | 2008 | Total exemption (full) |
| DEPTFORD SHEET METAL LTD | Fabricated metal products | 2010 | Total exemption (full) |