| LUCY GROUP LTD | Electrical equipment | 1897 | Group accounts |
| HOLYWELL PRESS LIMITED(THE) | Printing and recorded media | 1912 | Total exemption (full) |
| W.H.MUNSEY LIMITED | Repair and installation of machinery | 1913 | Total exemption (full) |
| LAWSON FUSES LIMITED | Electrical equipment | 1938 | Small company accounts |
| BLAKLEY ELECTRICS LIMITED | Electrical equipment | 1957 | Full accounts |
| TI GROUP AUTOMOTIVE SYSTEMS (UK) LIMITED | Basic metals | 1963 | Audit-exempt subsidiary |
| A.W. CLARKE (ENGINEERING) LIMITED | Other manufacturing | 1966 | Total exemption (full) |
| AIRBUS HELICOPTERS UK LIMITED | Repair and installation of machinery | 1974 | Full accounts |
| LUCY ELECTRIC UK LIMITED | Electrical equipment | 1974 | Full accounts |
| OQEMA LIMITED | Chemicals | 1975 | Full accounts |
| OXFORD LASERS LIMITED | Computers, electronics and optics | 1977 | Full accounts |
| FARM ENERGY AND CONTROL SERVICES LIMITED | Electrical equipment | 1980 | Total exemption (full) |
| REEVITE INDUSTRIAL MOULDINGS LIMITED | Rubber and plastics | 1982 | Total exemption (full) |
| OXFORD PRODUCTS LIMITED | Other manufacturing | 1983 | Group accounts |
| OXKEM LIMITED | Chemicals | 1986 | Total exemption (full) |
| CAP CODER LIMITED | Machinery and equipment | 1987 | Total exemption (full) |
| CODAMOTION LTD | Other manufacturing | 1987 | Total exemption (full) |
| DATA PLASTICS LIMITED | Rubber and plastics | 1990 | Group accounts |
| RAW WORKSHOP | Furniture | 1992 | Small company accounts |
| LEYLAND TRUCKS LIMITED | Motor vehicles and parts | 1993 | Full accounts |
| SAMUEL JAMES ENGINEERING LIMITED | Electrical equipment | 1993 | Full accounts |
| OXFORD BIOMEDICA (UK) LIMITED | Pharmaceuticals | 1995 | Full accounts |
| PREMIER PLASTIC PARTS LIMITED | Rubber and plastics | 1995 | Small company accounts |
| TI GROUP AUTOMOTIVE SYSTEMS (DEESIDE) LIMITED | Motor vehicles and parts | 1995 | Audit-exempt subsidiary |
| AGENT PRINT LIMITED | Printing and recorded media | 1996 | Total exemption (full) |
| CARBOHYDRATE SYNTHESIS LTD. | Chemicals | 1997 | Total exemption (full) |
| PACCAR TRUCKS U.K. LTD | Motor vehicles and parts | 1998 | Full accounts |
| BRICK KILN (UK) LIMITED | Motor vehicles and parts | 1998 | Total exemption (full) |
| PUMP PARTS LIMITED | Basic metals | 1999 | Total exemption (full) |
| ADVANCED COMPREHENSIVE ENGINEERING SERVICES LIMITED | Machinery and equipment | 1999 | Small company accounts |
| PARK SIGNALLING LIMITED | Electrical equipment | 1999 | Full accounts |
| OPTEK LIMITED | Machinery and equipment | 2000 | Audit-exempt subsidiary |
| LOCATION EXTREME (UK) LIMITED | Computers, electronics and optics | 2000 | Total exemption (full) |
| OXFORD FIBER LTD | Computers, electronics and optics | 2000 | Total exemption (full) |
| XDS OXFORD LIMITED | Machinery and equipment | 2001 | Full accounts |
| PREMIER SECURITY PRODUCTS LIMITED | Rubber and plastics | 2001 | Small company accounts |
| NEWTRIM (UK) LTD. | Other manufacturing | 2001 | Total exemption (full) |
| INSTRUMENTEL LIMITED | Computers, electronics and optics | 2001 | Full accounts |
| EMBEDDED ANTENNA DESIGN LIMITED | Other manufacturing | 2003 | Total exemption (full) |
| A.L.N. HEATING LIMITED | Fabricated metal products | 2003 | Total exemption (full) |
| MOSAIC CONTOUR GRINDERS LIMITED | Machinery and equipment | 2003 | Total exemption (full) |
| SANTA RITA EUROPE LIMITED | Beverages | 2003 | Full accounts |
| CORNFIELD BAKERY LIMITED | Food products | 2003 | Total exemption (full) |
| STOWOOD SCIENTIFIC INSTRUMENTS LTD | Other manufacturing | 2004 | Total exemption (full) |
| CUPEC LIMITED | Furniture | 2005 | Total exemption (full) |
| SCHEDL AUTOMOTIVE SYSTEM SERVICE LTD | Motor vehicles and parts | 2005 | Total exemption (full) |
| ENZYME SUPPLIES LIMITED | Chemicals | 2005 | Unaudited abridged |
| JOHN HILL FOODS LIMITED | Food products | 2006 | Total exemption (full) |
| NAUTIQUES UK LTD | Repair and installation of machinery | 2006 | Total exemption (full) |
| OXFORD LASERS GROUP LIMITED | Machinery and equipment | 2006 | Group accounts |
| PHARMA ENGINEERING LIMITED | Machinery and equipment | 2007 | Total exemption (full) |
| OXFORD BIODYNAMICS PLC | Pharmaceuticals | 2007 | Group accounts |
| FOSTON PROPERTY LIMITED | Rubber and plastics | 2007 | Small company accounts |
| LUCY ELECTRIC DIGITAL SOLUTIONS LIMITED | Electrical equipment | 2007 | Small company accounts |
| MACHINEFOREST LIMITED | Computers, electronics and optics | 2008 | Total exemption (full) |
| SCOTT TOOLS LIMITED | Fabricated metal products | 2008 | Total exemption (full) |
| B S GLASS AND GLAZING LTD | Glass, ceramics, cement and stone | 2008 | Total exemption (full) |
| J.E. PILL & SONS LTD | Food products | 2008 | Total exemption (full) |
| THE SHOTOVER BREWING COMPANY LTD | Beverages | 2009 | Total exemption (full) |
| MIDAS AUTOMOTIVE LTD. | Motor vehicles and parts | 2009 | Total exemption (full) |