| Companion Care (Services) Ltd | Handforth | A rating |
| Companion Care Solutions Limited | WOKINGHAM | A rating |
| Companion Group Ltd | CHISLEHURST | A rating |
| Company 3 Studios UK Ltd | London | A rating |
| Company Chameleon Ltd | Manchester | A rating |
| Company Watch Limited | Chippenham, | A rating |
| Compare my Care Ltd | Eye | A rating |
| Compare My Insurance | Swansea | A rating |
| COMPARE MY MOVE LTD | Cardiff | A rating |
| COMPARE TRAVEL SERVICES LIMITED | High Wycombe | A rating |
| Comparitec Ltd | Chester | A rating |
| Compass Associates | Cosham | A rating |
| Compass Box Delicious Whisky Ltd. | Richmond | A rating |
| COMPASS CARE HOMES LTD | Huddersfield | A rating |
| Compass Community Care Ltd | Newtown | A rating |
| COMPASS CONSTRUCTION & MAINT ENANCE SERVICES LTD | EDGWARE | A rating |
| Compass Culture and Education Ltd | Watford | A rating |
| Compass Disability Services | Taunton | A rating |
| Compass Group Plc | Chertsey | A rating |
| Compass Group UK & Ireland Limited Registered Office | Chertsey | A rating |
| Compass Homecare | Hove | A rating |
| COMPASS HOUSE LIMITED t/a Yayas | Glasgow | A rating |
| Compass International Ltd | Brighton | A rating |
| Compass Labs Ltd | London | A rating |
| Compass Logistics International LTD | Slough | A rating |
| COMPASS Pathfinder Limited | London | A rating |
| Compass Plus (GB) LTD | Nottingham | A rating |
| COMPASS POINT INTERIORS LTD | London | A rating |
| Compassco Limited | Worcester | A rating |
| Compassion Care Limited | Cotgrave | A rating |
| Compassion First Care Ltd | Silverdale | A rating |
| COMPASSION HEALTHCARE STAFFING SERVICES LTD | MAIDSTONE | A rating |
| Compassion Homes LTD | Bolton | A rating |
| Compassion Plus Healthcare Limited | Letchworth Garden City | A rating |
| COMPASSION PLUS LIMITED | London | A rating |
| Compassion UK Christian Child Development | Fleet | A rating |
| COMPASSION WEB DESIGN LTD | London | A rating |
| Compassionate Care Day Services LTD | Coventry | A rating |
| Compassionate Care Group Services Ltd | Altrincham | A rating |
| Compassionate Care Home Limited | Worthing | A rating |
| Compassionate Care Team Ltd | Retford | A rating |
| Compassionate Healthcare Ltd | Stoke On Trent | A rating |
| Compassionate Heart Ltd | Cambridge | A rating |
| Compassionate Herts Ltd | Hemel Hempstead | A rating |
| CompassRock Real Estate Ltd | London | A rating |
| CompatibL Technologies Ltd | London | A rating |
| Compco Fire Systems Ltd | Worcester | A rating |
| Competence Assurance Solutions Ltd | Rugby | A rating |
| Competence Development Limited | Wigen | A rating |
| COMPETIDOR LTD | Brighton | A rating |
| Competitive Cars LTD | Slough | A rating |
| Competitive Edge Wealth Creation Ltd | Southsea | A rating |
| COMPETITIVE LIMITED | Greenford | A rating |
| COMPETITIVE SECURITY SERVICES LIMITED | Southall | A rating |
| Competitive Socialising Limited | London | A rating |
| COMPLEAT CARE (UK) LIMITED | BOURNE | A rating |
| Complement Genomics Limited | Lanchester | A rating |
| Complement Therapeutics Limited | London | A rating |
| Compleo Charging Solutions UK Limited | London | A rating |
| COMPLEO HEALTH LIMITED | Manchester | A rating |
| Complesso limited | wolverhampton | A rating |
| Complesso Limited | Newark | A rating |
| Complete Building Control Ltd | Birmingham | A rating |
| Complete Camera Company Ltd | Warwick | A rating |
| Complete Care 4 U Limited | Bolton | A rating |
| Complete Care Agency Ltd | Leeds | A rating |
| Complete Care Chesterfield Limited | South Normanton | A rating |
| Complete Care Chesterfield Ltd | Claycross | A rating |
| COMPLETE CARE GROUP LIMITED trading as St Anne's Residential Care Home | Eastbourne | A rating |
| COMPLETE CARE HOMES LIMITED | Scarborough | A rating |
| Complete Care Services Limited | Luton | A rating |
| Complete Care West Yorkshire Ltd | Wakefield | A rating |
| Complete Certification Ltd | Nottingham | A rating |
| Complete Childrens Care Ltd | Cheadle | A rating |
| Complete Co-packing Services Limited | RCT | A rating |
| Complete Coherence Limited | Romsey | A rating |
| Complete Commodity Solutions | Beverley | A rating |
| COMPLETE CONSULTANCY LIMITED | Pinner | A rating |
| complete contemporary care triple c | Leeds | A rating |
| Complete Cover Group Limited | Feltham | A rating |
| Complete Cyber Limited | Princes Risborough | A rating |
| Complete Dental Care | London | A rating |
| Complete Dental Practice | Birmingham | A rating |
| Complete Electrical UK Ltd | Wigan | A rating |
| Complete Fertility Ltd | Eastleigh | A rating |
| COMPLETE FIX LTD | Dagenham | A rating |
| COMPLETE GARDENING & FENCING SERVICES LTD | Southampton | A rating |
| Complete Healthcare Cambridge Limited | Huntingdon | A rating |
| Complete Homecare 24 LTD | Lurgan | A rating |
| Complete Moling Services (Southeast) Limited | Rochester | A rating |
| COMPLETE PACKAGING SOLUTIONS LIMITED | Leicester | A rating |
| Complete People Solutions Ltd | Northampton | A rating |
| Complete Physiotherapy Limited | Caversham | A rating |
| Complete Pilates Medical Ltd | London | A rating |
| Complete Prime Residential Limited | London | A rating |
| Complete Projects Consulting Limited (TA Complete Projects) | London | A rating |
| Complete Qadri Care Ltd | London | A rating |
| COMPLETE SITE SERVICES LIMITED | LONDON | A rating |
| COMPLETE SOLAR ENERGY SOLUTIONS UK LTD | London | A rating |
| Complete Support Care Services Ltd | NORTHAMPTON | A rating |
| Complete Sustainability Solutions | Manchester | A rating |
| Complete Tree Care Ltd | Shrewsbury | A rating |
| Complete Vehicle Management Limited | Whiteley | A rating |
| Complete Ventilation Solutions Ltd | Liverpool | A rating |
| Completelink Limited | Stourbridge | A rating |
| COMPLETION SALES & LETTINGS LIMITED | London | A rating |
| Complex Recruitment Ltd | London | A rating |
| Complexicom Ltd | Hauxton | A rating |
| Complexio Limited | London | A rating |
| COMPLIANCE ANALYTICS LIMITED | London | A rating |
| Compliance Energy LTD | Ilford | A rating |
| COMPLIANCE ENGINEERING LIMITED | Antrim | A rating |
| Compliance Health Limited | Leicester | A rating |
| COMPLIANCE HOUSE LIMITED | London | A rating |
| Compliance Online Limited | London | A rating |
| Compliance Recruitment Solutions Ltd | London | A rating |
| Compliance Solutions (Lifesciences) Ltd | Glasgow | A rating |
| Complus Asset Management (UK) Limited | London | A rating |
| Comply Exchange Limited | Kingswood | A rating |
| ComplyCube | London | A rating |
| Complygate Limited | Birmingham | A rating |
| Complyport Limited | London | A rating |
| Component Centre Ltd t/a Samra Automotive Parts | HUDDERSFIELD | A rating |
| Component Distributors Limited | Newtownabbey | A rating |
| Compositional IT Ltd | London | A rating |
| Compost Creative Ltd | Brighton | A rating |
| Compotex Limited | Rochdale | A rating |
| Compound Digital Technologies Limited | London | A rating |
| Compound RE Strategies Limited | London | A rating |
| Compound Semiconductor Applications Catapult Ltd | Newport | A rating |
| Compre Services (UK) Limited | London | A rating |
| Comprehensive IT Developers Ltd | Blackburn | A rating |
| COMPREHENSIVE SERVICES LTD | Milton Keynes | A rating |
| Compressed Air Centre Ltd | Chessington | A rating |
| Compressed Air Services Ltd | Birmingham | A rating |
| COMPSAN LIMITED | London | A rating |
| Compsoft (UK) Ltd | Alton | A rating |
| Comptoir Group PLC | London | A rating |
| Compton & Chanlder's Ford Cricket Club | Winchester | A rating |
| Compton Beauchamp Estates Ltd | Faringdon | A rating |
| Compucorp Ltd | Hemel Hempstead | A rating |
| Compufile Systems Limited | Godalming | A rating |
| COMPUHOUSE LIMITED | London | A rating |
| Compurants Limited (t/a inamo restaurants & bars) | London | A rating |
| Compusoft GB Ltd | Ashby-de-la-Zouch | A rating |
| Computacenter (UK) Ltd | Hatfield | A rating |
| Computamatrix Limited Trading As Matrica | London | A rating |
| Computational Modelling Cambridge Ltd. | Cambridge | A rating |
| Compute One Ltd | Wakefield | A rating |
| Computer Club Limited | Stockport | A rating |
| Computer ConQuest ltd | Shangton | A rating |
| Computer Gurus Limited | Tunbridge Wells | A rating |
| COMPUTER HYPE LTD | London | A rating |
| COMPUTER INTELLECTS LIMITED | Sutton | A rating |
| Computer Says Maybe Ltd | London | A rating |
| Computer Specialist LTD | Birmingham | A rating |
| Computer Task Group (UK) LTD | Reading | A rating |
| Computer Troubleshooters Redbridge Limited | Ilford | A rating |
| COMPUTERCARE ASSETS MANAGEMENT LIMITED | Brackley | A rating |
| COMPUTERKO LIMITED | ILFORD | A rating |
| Computershare Investor Services PLC | Bristol | A rating |
| Computewell Ltd. | Slough | A rating |
| Computing Distribution Group Ltd | Sunningdale | A rating |
| comScore UK Ltd | London | A rating |
| comsec consulting uk ltd. | LONDON | A rating |
| Comstar MG Ltd | London | A rating |
| Comstrac Limited | London | A rating |
| Comtact Limited | Milton Keynes | A rating |
| Comtec Translations Ltd | Leamington Spa | A rating |
| Comtech IT Services Limited | Northampton | A rating |
| COMTEK NETWORK SYSTEMS (UK)LTD | DEESIDE | A rating |
| COMTEK UK LIMITED | Watford, Herts | A rating |
| COMUNIDAD DE LA DIVINA MISERICORDIA | LONDON | A rating |
| COMUS INN LTD | CAMBLESFORTH | A rating |
| COMVE ENGINEERS LTD | London | A rating |
| Comviva Technologies Limited | London | A rating |
| Conanvet Limited | Conon Bridge | A rating |
| Concentric Capital Limited | Oxford | A rating |
| Concentric Pumps Limited | Redditch | A rating |
| Concentric Solutions Limited | Keele | A rating |
| Concentric Team LLP | London | A rating |
| Concentrix Catalyst Ltd | London | A rating |
| Concentrix Europe Limited | Belfast | A rating |
| Concentrix TSC UK Ltd | Larbert, | A rating |
| Concept Accountancy & payroll Services Ltd | Leicester | A rating |
| Concept Analytics LTD | Merseyside | A rating |
| CONCEPT BARS & RESTAURANTS LIMITED | Lancaster | A rating |
| CONCEPT BLINDS LIMITED | BLACKBURN | A rating |
| Concept Building Services (Southern) Ltd | Chichester | A rating |
| CONCEPT BUILDING WORK UK LIMITED | London | A rating |
| Concept Care Solutions Limited | Watford | A rating |
| Concept Care Solutions Ltd | Watford | A rating |
| CONCEPT CARS LTD | Beckton | A rating |
| CONCEPT ENERGY LTD | Erdington, Birmingham | A rating |
| Concept Engineering Consultants Ltd | Leicester | A rating |
| CONCEPT ESTATE AGENTS LTD | LONDON | A rating |
| Concept Eye Clinic Limited | Newcastle Upon Tyne | A rating |
| CONCEPT FERTILITY LIMITED | London | A rating |
| CONCEPT FLOORING NW LTD | KEIGHLEY | A rating |
| Concept Generators Ltd | Aberdeen | A rating |