| ST.AUSTELL BREWERY COMPANY LIMITED | Beverages | 1910 | Group accounts |
| IRONS BROTHERS,LIMITED | Basic metals | 1930 | Total exemption (full) |
| ARCOL U.K. LIMITED | Computers, electronics and optics | 1952 | Small company accounts |
| FLANN MICROWAVE LIMITED | Other manufacturing | 1956 | Total exemption (full) |
| PUMP INTERNATIONAL LIMITED | Other manufacturing | 1957 | Total exemption (full) |
| POWER PRECISION & FABRICATION LIMITED | Machinery and equipment | 1966 | Total exemption (full) |
| FALMOUTH BOAT CONSTRUCTION LIMITED | Ships, aircraft, rail and other transport | 1970 | Total exemption (full) |
| JOBEL ENGINEERING LIMITED | Rubber and plastics | 1976 | Total exemption (full) |
| MOVEVIRGO LIMITED | Rubber and plastics | 1982 | Total exemption (full) |
| PRAS GOTH LIMITED | Computers, electronics and optics | 1984 | Total exemption (full) |
| DJR ROOF TRUSSES LIMITED | Wood products | 1984 | Total exemption (full) |
| TREYONE WOODCRAFT LIMITED | Furniture | 1985 | Total exemption (full) |
| ORION PROJECTS LIMITED | Computers, electronics and optics | 1987 | Total exemption (full) |
| PENDENNIS SHIPYARD (HOLDINGS) LIMITED | Ships, aircraft, rail and other transport | 1988 | Group accounts |
| PARKWAY TIMBER COMPANY LIMITED | Wood products | 1990 | Total exemption (full) |
| ACE GENERAL ENGINEERING (CORNWALL) LTD | Fabricated metal products | 1993 | Total exemption (full) |
| PENDENNIS SHIPYARD LIMITED | Ships, aircraft, rail and other transport | 1994 | Full accounts |
| WESTERN MECHANICAL HANDLING UK LIMITED | Machinery and equipment | 1994 | Total exemption (full) |
| M.P.B. ENGINEERING (FALMOUTH) LIMITED | Repair and installation of machinery | 1999 | Total exemption (full) |
| ALLEN & HEATH LIMITED | Electrical equipment | 2001 | Audit-exempt subsidiary |
| WADEBRIDGE BOATYARD LTD. | Repair and installation of machinery | 2002 | Total exemption (full) |
| EAT ART LIMITED | Other manufacturing | 2002 | Total exemption (full) |
| PRJ ENGINEERING LIMITED | Machinery and equipment | 2003 | Unaudited abridged |
| BLAST CLEAN AND COATINGS LIMITED | Fabricated metal products | 2003 | Total exemption (full) |
| JAMIES PASTY SHOP LIMITED | Food products | 2003 | Total exemption (full) |
| F D HALL AND SON LIMITED | Wood products | 2003 | Total exemption (full) |
| F & K ELECTRICAL & REFRIGERATION LIMITED | Repair and installation of machinery | 2004 | Total exemption (full) |
| AUSTCORNISH ADVENTURES LIMITED | Other manufacturing | 2006 | Total exemption (full) |
| CEMON HOMEOPATHICS LIMITED | Chemicals | 2006 | Total exemption (full) |
| HORIZON MOBILITY LTD | Ships, aircraft, rail and other transport | 2006 | Total exemption (full) |
| GRAHAMS GARDEN MACHINERY LTD | Repair and installation of machinery | 2007 | Total exemption (full) |
| BLAKES BAKERY LIMITED | Food products | 2010 | Total exemption (full) |