| S&B HERBA FOODS LIMITED | Food products | 1919 | Full accounts |
| ILIFFE PRINT CAMBRIDGE LIMITED | Printing and recorded media | 1929 | Audit-exempt subsidiary |
| MARSHALL OF CAMBRIDGE AEROSPACE LIMITED | Ships, aircraft, rail and other transport | 1930 | Full accounts |
| GRATNELLS LIMITED | Rubber and plastics | 1940 | Group accounts |
| PRIOR SCIENTIFIC INSTRUMENTS LIMITED | Computers, electronics and optics | 1946 | Group accounts |
| TODD RESEARCH LIMITED | Other manufacturing | 1950 | Small company accounts |
| THE COMPANY OF BIOLOGISTS | Printing and recorded media | 1952 | Full accounts |
| BLAYSON - OLEFINES LIMITED | Other manufacturing | 1961 | Full accounts |
| NAPP PHARMACEUTICAL GROUP LIMITED | Pharmaceuticals | 1966 | Full accounts |
| COULSON JOINERY LIMITED | Wood products | 1966 | Small company accounts |
| CRITICAL MARITIME SYSTEMS & SUPPORT LIMITED | Machinery and equipment | 1969 | Full accounts |
| CAMBRIDGE ELECTRONIC DESIGN LIMITED | Computers, electronics and optics | 1970 | Total exemption (full) |
| BARD PHARMACEUTICALS LIMITED | Pharmaceuticals | 1970 | Full accounts |
| SUPPLY PLUS LIMITED | Fabricated metal products | 1972 | Small company accounts |
| COLLINS WALKER LIMITED | Fabricated metal products | 1972 | Total exemption (full) |
| DIBA INDUSTRIES LIMITED | Pharmaceuticals | 1973 | Full accounts |
| ABILIA LTD | Other manufacturing | 1973 | Full accounts |
| U.Q.G. LIMITED | Glass, ceramics, cement and stone | 1973 | Total exemption (full) |
| DOMINO PRINTING SCIENCES PUBLIC LIMITED COMPANY | Machinery and equipment | 1978 | Full accounts |
| GRATICULES OPTICS LIMITED | Computers, electronics and optics | 1978 | Audit-exempt subsidiary |
| AMETHYST DESIGNS LIMITED | Electrical equipment | 1981 | Total exemption (full) |
| THERMOTEKNIX SYSTEMS LIMITED | Machinery and equipment | 1982 | Full accounts |
| ADVANCED FURNACE TECHNOLOGY LTD. | Other manufacturing | 1983 | Total exemption (full) |
| DR REDDY'S LABORATORIES (UK) LIMITED | Pharmaceuticals | 1983 | Full accounts |
| DOMINO UK LIMITED | Electrical equipment | 1983 | Full accounts |
| SCINTACOR LIMITED | Other manufacturing | 1983 | Small company accounts |
| DIXON INTERNATIONAL GROUP LIMITED | Rubber and plastics | 1984 | Small company accounts |
| SYNOPTICS LIMITED | Electrical equipment | 1984 | Audit-exempt subsidiary |
| CAMBRIDGE CIRCUIT COMPANY LIMITED | Computers, electronics and optics | 1986 | Total exemption (full) |
| DATA CONVERSION SYSTEMS LIMITED | Computers, electronics and optics | 1986 | Total exemption (full) |
| CAMBRIDGE ELECTRONIC INDUSTRIES LIMITED | Computers, electronics and optics | 1987 | Total exemption (full) |
| CAMBUSTION LIMITED | Machinery and equipment | 1987 | Full accounts |
| HAM-LET CFS LTD | Machinery and equipment | 1987 | Full accounts |
| PREMIER LABORATORY SYSTEMS LIMITED | Fabricated metal products | 1987 | Total exemption (full) |
| MIDLAND PRESS LTD | Beverages | 1988 | Total exemption (full) |
| SHAMIR UK LIMITED | Other manufacturing | 1988 | Full accounts |
| SHERWOOD SCIENTIFIC LIMITED | Other manufacturing | 1988 | Total exemption (full) |
| PRP OPTOELECTRONICS LIMITED | Computers, electronics and optics | 1989 | Total exemption (full) |
| BLAYSON CASTING SYSTEMS LIMITED | Machinery and equipment | 1990 | Total exemption (full) |
| ASTLES CONTROL SYSTEMS LIMITED | Electrical equipment | 1990 | Small company accounts |
| ENVEA UK LTD | Computers, electronics and optics | 1990 | Full accounts |
| FILCRIS LIMITED | Other manufacturing | 1990 | Total exemption (full) |
| SCIENTIFIC VACUUM SYSTEMS LTD | Machinery and equipment | 1990 | Small company accounts |
| HYPRO EU LIMITED | Other manufacturing | 1991 | Full accounts |
| JASPER BYRNE LIMITED | Leather goods and footwear | 1991 | Total exemption (full) |
| THE WICKED CAKE CO. LIMITED | Food products | 1991 | Total exemption (full) |
| THERMAL EXCHANGE LIMITED | Machinery and equipment | 1991 | Unaudited abridged |
| FRASER ANTI-STATIC TECHNIQUES LIMITED | Electrical equipment | 1991 | Full accounts |
| OUTSIDE IN (CAMBRIDGE) LIMITED | Other manufacturing | 1991 | Total exemption (full) |
| LTE SCIENTIFIC LIMITED | Machinery and equipment | 1991 | Small company accounts |
| EAST ANGLIAN HAULAGE LIMITED | Glass, ceramics, cement and stone | 1991 | Total exemption (full) |
| MARSHALL LAND SYSTEMS LTD | Motor vehicles and parts | 1991 | Full accounts |
| DELTA DESIGN AND ENGINEERING LIMITED | Fabricated metal products | 1991 | Total exemption (full) |
| CHELL INSTRUMENTS LIMITED | Machinery and equipment | 1992 | Small company accounts |
| ASTRAZENECA PLC | Pharmaceuticals | 1992 | Group accounts |
| MICHAEL WILLIAMS ENGINEERING LIMITED | Machinery and equipment | 1992 | Total exemption (full) |
| SENTEK LIMITED | Other manufacturing | 1992 | Small company accounts |
| STORMSURE LIMITED | Chemicals | 1992 | Total exemption (full) |
| CEDAR AUDIO LIMITED | Other manufacturing | 1993 | Unaudited abridged |
| WORLD OF COMPUTERS LIMITED | Computers, electronics and optics | 1994 | Total exemption (full) |