| FINDLAY, IRVINE LIMITED | Midlothian | 1960 | Total exemption (full) |
| GRANT INSTRUMENTS (CAMBRIDGE) LIMITED | Royston | 1960 | Group accounts |
| SENS-TECH LIMITED | Guildford | 1960 | Audit-exempt subsidiary |
| SIRCO CONTROLS LIMITED | Essex | 1960 | Total exemption (full) |
| JAMES HUGH GROUP LIMITED | London | 1960 | Total exemption (full) |
| WHITESMITH LIMITED | Birkenhead | 1961 | Total exemption (full) |
| ELSTREE PRECISION COMPANY LIMITED | Welwyn Garden City | 1961 | Total exemption (full) |
| CAMBION ELECTRONICS LIMITED | Hope Valley | 1961 | Small company accounts |
| OXFORD INSTRUMENTS NANOTECHNOLOGY TOOLS LIMITED | High Wycombe | 1961 | Full accounts |
| MICROCHIP TECHNOLOGY CALDICOT LIMITED | Wokingham, Berks | 1961 | Full accounts |
| CONNEVANS LIMITED | Merstham | 1961 | Total exemption (full) |
| HCD RESEARCH LIMITED | Sussex | 1961 | Total exemption (full) |
| STMICROELECTRONICS LIMITED | Marlow | 1962 | Full accounts |
| BRIGHTON ELECTRICAL ASSEMBLIES LIMITED | Eastbourne | 1962 | Total exemption (full) |
| SIEMENS PLC | Farnborough | 1962 | Full accounts |
| PERMEX LIMITED | Rye Park Industrial Estate | 1962 | Total exemption (full) |
| LEE-DICKENS LIMITED | Kettering | 1962 | Total exemption (full) |
| CUTLERY AND ALLIED TRADES RESEARCH ASSOCIATION | South Yorkshire | 1962 | Total exemption (full) |
| IBM UNITED KINGDOM LIMITED | Winchester | 1962 | Full accounts |
| P.A.HILTON LIMITED | Andover | 1962 | Total exemption (full) |
| GE AVIATION SYSTEMS LIMITED | Cheltenham | 1963 | Full accounts |
| TRANILAMP LIMITED | Bury St. Edmunds | 1963 | Total exemption (full) |
| I.M.O. PRECISION CONTROLS LIMITED | Hatfield | 1963 | Group accounts |
| R.K. PRINT-COAT INSTRUMENTS LIMITED | Royston | 1963 | Total exemption (full) |
| AMPHENOL LIMITED | Whitstable | 1963 | Full accounts |
| MAXVIEW LIMITED | King’s Lynn | 1964 | Total exemption (full) |
| INSTRO PRECISION LIMITED | Sandwich | 1964 | Full accounts |
| FYLDE ELECTRONIC LABORATORIES LIMITED | Preston | 1964 | Total exemption (full) |
| PARTECH (ELECTRONICS) LIMITED | St. Austell | 1964 | Small company accounts |
| PANDECT PRECISION COMPONENTS LIMITED | High Wycombe | 1964 | Total exemption (full) |
| RAYLEIGH INSTRUMENTS LIMITED | South Woodham Ferrers | 1964 | Full accounts |
| FENN NIGHT VISION LIMITED | Farnborough | 1964 | Total exemption (full) |
| PEKTRON GROUP LIMITED | Derby | 1964 | Full accounts |
| FURNESS CONTROLS LIMITED | Bexhill-on-Sea | 1964 | Group accounts |
| NEWBOW AEROSPACE LIMITED | Brierley Hill | 1964 | Total exemption (full) |
| MOWDEN CONTROLS LIMITED | Northallerton | 1965 | Full accounts |
| PAKTRONIC ENGINEERING COMPANY LIMITED | Grantham | 1965 | Total exemption (full) |
| CI PRECISION LIMITED | Salisbury | 1965 | Total exemption (full) |
| EUROTHERM LIMITED | West Sussex | 1965 | Full accounts |
| P.& M.SERVICES(ROCHDALE)LIMITED | Hebden Bridge | 1965 | Total exemption (full) |
| PICKERING ELECTRONICS LIMITED | Clacton-on-Sea | 1965 | Group accounts |
| SONATEST LTD | Milton Keynes | 1965 | Full accounts |
| TESTEMP LIMITED | Worthing | 1965 | Total exemption (full) |
| THALES UK LIMITED | Reading | 1966 | Full accounts |
| ROCKWELL AUTOMATION LIMITED | Milton Keynes | 1966 | Full accounts |
| ELSTER METERING LIMITED | Bracknell | 1966 | Full accounts |
| QIOPTIQ LIMITED | Denbighshire | 1966 | Full accounts |
| H.R. SMITH (TECHNICAL DEVELOPMENTS) LIMITED | Leominster | 1966 | Full accounts |
| L.E.W. TECHNIQUES LIMITED | Taunton | 1966 | Small company accounts |
| B & W GROUP LTD | West Sussex | 1966 | Full accounts |
| SCIENTIFIC GLASS LABORATORIES LIMITED | Stoke-on-Trent | 1966 | Total exemption (full) |
| VIAVI SOLUTIONS UK LIMITED | Stevenage | 1966 | Full accounts |
| INTERCOLE SYSTEMS LIMITED | Eastleigh | 1966 | Total exemption (full) |
| COMPUGRAPHICS INTERNATIONAL LIMITED | Woking | 1967 | Full accounts |
| ANALOG DEVICES LIMITED | Hayes | 1967 | Full accounts |
| STAGE CONTROL LIMITED | Edgware | 1967 | Total exemption (full) |
| CICOR NEWPORT LTD | Newport | 1967 | Full accounts |
| CHELTON LIMITED | Marlow | 1967 | Full accounts |
| HUBER + SUHNER (UK) LIMITED | Oxon | 1967 | Full accounts |
| TIME ELECTRONICS LIMITED | Tunbridge Wells | 1967 | Total exemption (full) |