| TRIUMPH AEROSPACE OPERATIONS UK, LTD. | Ships, aircraft, rail and other transport | 1961 | Full accounts |
| CONVATEC LIMITED | Other manufacturing | 1977 | Audit-exempt subsidiary |
| FIREPROTECT (CHESTER) LIMITED | Other manufacturing | 1981 | Total exemption (full) |
| J. REID TRADING LIMITED | Machinery and equipment | 1984 | Total exemption (full) |
| ACE LIFTS LTD | Repair and installation of machinery | 1985 | Total exemption (full) |
| WHAT'S COOKING DEESIDE UK LTD | Food products | 1986 | Full accounts |
| VISTA THERM | Glass, ceramics, cement and stone | 1987 | Medium company accounts |
| SPENCERS GAS CARE LIMITED | Repair and installation of machinery | 1988 | Total exemption (full) |
| ARDAGH METAL PACKAGING UK LIMITED | Fabricated metal products | 1990 | Full accounts |
| LCA GROUP LIMITED | Computers, electronics and optics | 1991 | Small company accounts |
| HALON AND REFRIGERANT SERVICES LIMITED | Chemicals | 1991 | Total exemption (full) |
| RUSSELL IPM LTD | Other manufacturing | 1993 | Medium company accounts |
| DEEPACK LIMITED | Other manufacturing | 1994 | Total exemption (full) |
| TDC HYDRO LIMITED | Fabricated metal products | 1997 | Total exemption (full) |
| R & J HARNESSES LIMITED | Electrical equipment | 1998 | Total exemption (full) |
| ELECTROIMPACT UK LIMITED | Machinery and equipment | 2000 | Full accounts |
| SPENCERS HOMES LIMITED | Repair and installation of machinery | 2001 | Total exemption (full) |
| GENERATOR NPD LIMITED | Other manufacturing | 2001 | Total exemption (full) |
| J REID ENGINEERING LIMITED | Machinery and equipment | 2002 | Total exemption (full) |
| DURABLE CAST PARTS LIMITED | Basic metals | 2002 | Total exemption (full) |
| SPREAD-A-BALE LIMITED | Machinery and equipment | 2005 | Total exemption (full) |
| ASTRA VEHICLE TECHNOLOGIES LIMITED | Ships, aircraft, rail and other transport | 2005 | Total exemption (full) |
| ICE AND EASY LTD | Food products | 2005 | Audit-exempt subsidiary |
| M.E.S.POWERSPORTS LIMITED | Repair and installation of machinery | 2006 | Unaudited abridged |
| MEILLER-BOWELD UK LIMITED | Motor vehicles and parts | 2006 | Small company accounts |
| RIVERSIDE GRAVURE LTD | Printing and recorded media | 2008 | Total exemption (full) |
| BIOFORTUNA LIMITED | Pharmaceuticals | 2008 | Small company accounts |
| COMPRESSED GAS SOLUTIONS LIMITED | Chemicals | 2008 | Total exemption (full) |
| TRIUMPH CONTROLS - UK, LTD. | Ships, aircraft, rail and other transport | 2009 | Small company accounts |
| MILNER ENGINEERING SERVICES LIMITED | Fabricated metal products | 2009 | Total exemption (full) |
| VERNON MORRIS UTILITY SOLUTIONS LIMITED | Machinery and equipment | 2009 | Total exemption (full) |