| COMFORT CARE HOMES(GLAN-YR-AFON)LIMITED | BLACKWOOD | A rating |
| Comfort Care Services (Colchester) Ltd | Colchester | A rating |
| Comfort Care Services UK Ltd | Slough | A rating |
| Comfort Click Limited | Sevenoaks | A rating |
| COMFORT ELECTRICAL LIMITED | London | A rating |
| Comfort Food Services Ltd | London | A rating |
| COMFORT HARMONY CARE LTD | Thatcham | A rating |
| Comfort Home Care | HUDDERSFIELD | A rating |
| Comfort Homes and Care Ltd | Birmingham | A rating |
| Comfort International | Cumbernauld | A rating |
| Comfort Living Care Ltd | South Croydon | A rating |
| Comfort Living Care Services ltd | Milton Keynes | A rating |
| Comfort Lodge Services (UK) Ltd | London | A rating |
| Comfort Support Services Ltd | Bolton | A rating |
| Comfort Toilet Hire Limited | Luton | A rating |
| Comfort Transport UK Limited | LONDON | A rating |
| Comfort Unisex Hairbraiding / African textiles | Bristol | A rating |
| Comfort24 Ltd. | Cleckheaton | A rating |
| COMFORTABLE CARE LTD | London | A rating |
| Comforting Care Limited | Wakefield | A rating |
| Comforting Healthcare Ltd | Leeds | A rating |
| COMFORTS INDEPENDENT LIVING CARE LTD | NORTH FINCHLEY | A rating |
| COMFOTEL HOTELS LLP | London | A rating |
| Comfy Care Homes Limited | Scarborough | A rating |
| COMFY DELUXE LTD | Dewsbury | A rating |
| COMFY FLOORS LTD | Bradford | A rating |
| COMFY HOME PROPERTIES LTD | Leicester | A rating |
| Comfy Quilts Ltd | Manchester | A rating |
| ComfyRelo Ltd | Bristol | A rating |
| COMFYY BEDS & SOFA LTD | Batley | A rating |
| Comhairle nan Eilean Siar | Stornoway | A rating |
| CoMind Technologies Limited | London | A rating |
| ComIT Consulting Ltd | Slough | A rating |
| comit Financial Systems UK Limited | London | A rating |
| ComityHearts Care Services | Leeds | A rating |
| Comline Auto Parts Limited | Bedford | A rating |
| COMM-TECH VOICE & DATA LIMITED | Norwich | A rating |
| CommAgility Limited | Loughborough | A rating |
| Command Alkon Ltd | Bristol | A rating |
| Command Rooms Ltd | Wymondham | A rating |
| Commander Building Services Limited | Rayleigh | A rating |
| COMMBITZ LTD | London | A rating |
| Commcorde Solutions Limited | London | A rating |
| Commend UK Limited | Stansted | A rating |
| Commerce Collective UK Limited | London | A rating |
| Commerce Decisions Ltd | Abingdon | A rating |
| Commerce Pulse Ltd. | Milton Keynes | A rating |
| Commerce Software UK LTD | London | A rating |
| Commerce Zone Ltd | Halifax | A rating |
| CommerceCentric UK Ltd | London | A rating |
| Commercetools Ltd | London | A rating |
| Commercial & Industrial Lighting Solutions Ltd | Petersfield | A rating |
| COMMERCIAL & RESIDENTIAL PROPERTIES LTD | MANCHESTER | A rating |
| COMMERCIAL CARS UK LTD | London | A rating |
| COMMERCIAL CONVENIENCE LTD | DURHAM | A rating |
| Commercial Cross Limited | Edinburgh | A rating |
| Commercial Dry Cleaning Limited | Cookham | A rating |
| COMMERCIAL EXTRACTIONS NATIONWIDE LTD | Cradley Heath | A rating |
| Commercial Funding Solutions Ltd | North Harrow | A rating |
| Commercial Improvements Limited | Luton | A rating |
| Commercial It recycling Ltd (T/A Ecogreen It Recycling) | Nottingham | A rating |
| Commercial Ltd | Cheltenham | A rating |
| Commercial Panels & Pressings Ltd | Northampton | A rating |
| Commercial Property Finance Limited T/A Property Finance Group | London | A rating |
| Commercial Services Design Limited | Leeds | A rating |
| COMMERCIAL VENTILATION SERVICES LTD | WEST MIDLANDS | A rating |
| COMMERCIAL WAY FOOD CITY LTD | PECKHAM | A rating |
| Commerz Real North Ltd | London | A rating |
| Commerzbank AG | London | A rating |
| COMMEXPO LTD | BIRMINGHAM | A rating |
| COMMIC INTERNATIONAL LTD | ACCRINGTON | A rating |
| Commission Apostolic Trust Ltd | Bournemouth | A rating |
| Commission Studio Ltd | London | A rating |
| Commissioning Agents International UK Ltd | Reading | A rating |
| Commissum Associates Limited | Edinburgh | A rating |
| Commit IT Consultancy Ltd | London | A rating |
| Commit2Care Services Ltd | Derby, Derbyshire | A rating |
| COMMITTED CARE SERVICES LIMITED | SLOUGH | A rating |
| Committed Solutions Ltd | MILTON KEYNES | A rating |
| COMMODITIES AI LTD | London | A rating |
| COMMODITRADE LIMITED | Carshalton | A rating |
| Commodity Risk Consultants Limited | Norwich | A rating |
| Common Cents Business Solution Ltd | Bromley | A rating |
| Common People Films | London | A rating |
| Common Pizza Restaurant Limited | London | A rating |
| Common Purpose Charitable Trust | London | A rating |
| Common Purpose Training Ltd | London | A rating |
| Common Seas C.I.C. | Totnes | A rating |
| Common Services Agency | Edinburgh | A rating |
| Commonfield Road Surgery | Wirral | A rating |
| Commonplace Digital LTD | Manchester | A rating |
| Commonside Management Services Limited | Bexhill-on-Sea | A rating |
| Commonwealth Association of Tax Adminstrators | London | A rating |
| Commonwealth Bank of Australia | London | A rating |
| Commonwealth Coaches Limited | Iver | A rating |
| Commonwealth College of Excellence Ltd | London | A rating |
| Commonwealth Enterprise & Investment Council | London | A rating |
| Commonwealth Games Federation | London | A rating |
| Commonwealth Local Government Forum | London | A rating |
| Commonwealth Secretariat | London | A rating |
| Commonwealth Telecommunications Organisation | London | A rating |
| Commonwealth War Graves Commission (CWGC) | Maidenhead | A rating |
| Comms365 | Milton Keynes | A rating |
| Comms8 Ltd | London | A rating |
| CommScope Connectivity UK Ltd | London | A rating |
| Commtech Solutions Ltd | Birmingham | A rating |
| Communere Limited | Guildford | A rating |
| Communication and Learning Enterprises Limited | Ulverston | A rating |
| Communication Works Publishing Group Limited | London | A rating |
| Communications Consultants Worldwide Limited | Bournemouth | A rating |
| Communications Inc | London | A rating |
| Communications International Group | London | A rating |
| Communications Software (Airline systems) Limited | London | A rating |
| Communications Software Airline Systems Ltd | Ashbourne | A rating |
| Communications Solutions Ltd UK | Reading | A rating |
| Communisis UK Limited | Leeds | A rating |
| Communitas Clincs Ltd | Croydon | A rating |
| COMMUNITECH LTD | BARKING | A rating |
| COMMUNITEKS LTD | Slough | A rating |
| Communities Inc. CIC | Leicester | A rating |
| Community Action Derby | Derby | A rating |
| Community Action Norfolk | Dereham | A rating |
| Community Activities Project Ealing (Cape) | London | A rating |
| Community Baptist Church North Manchester | Bury | A rating |
| COMMUNITY BELIEVE | London | A rating |
| Community Brands UK Ltd | Leicester | A rating |
| Community Care Experts Ltd | Surbiton | A rating |
| COMMUNITY CARE GROUP LTD | Manchester | A rating |
| Community Care Initiative | milton keynes | A rating |
| Community Care Investment Group Ltd | Burnham on Sea | A rating |
| Community Care Worker Ltd | Stoke-on-Trent | A rating |
| Community Careline Services Medway Limited | Kent | A rating |
| Community Childcare Centres | Waterlooville | A rating |
| Community Church of God | Tottenham | A rating |
| Community Church Putney | Putney | A rating |
| Community Church Warndon | Worcester | A rating |
| Community Clinical Care Ltd | London | A rating |
| Community Connex | Harrow | A rating |
| Community Counselling Service (UK) Limited | London | A rating |
| COMMUNITY DRUG AND ALCOHOL RECOVERY SERVICES | London | A rating |
| Community Energy Scotland | Inverness | A rating |
| Community Environmental Trust | BIRMINGHAM | A rating |
| Community Fibre Limited | London | A rating |
| COMMUNITY FOODS LIMITED | Witham | A rating |
| Community Health and Eyecare Limited | Preston | A rating |
| Community Health Partnerships | Manchester | A rating |
| Community Hosting and Support CIC | Gravesend | A rating |
| Community Housing | Kidderminster | A rating |
| Community Housing and Therapy | London | A rating |
| COMMUNITY INDEPENDENT LIVING LTD | Liverpool | A rating |
| Community Interest Care CIC | Aberdaugleddau | A rating |
| COMMUNITY INTEREST LUTON CIC | LUTON | A rating |
| Community Land Scotland | Glasgow | A rating |
| Community Led Regenerartion UK CIC | Middlesbrough | A rating |
| Community Lives Consortium | Swansea | A rating |
| COMMUNITY LIVING KENBURY HOUSE LTD. | Kenley | A rating |
| Community Living Ltd | Kenley | A rating |
| COMMUNITY OF CHRIST-BRITISH ISLES MISSION CENTRE | CHESTERFIELD | A rating |
| Community of Saint John | London | A rating |
| Community of Saint John the Baptist | Maldon | A rating |
| Community of the Resurrection | Mirfield | A rating |
| Community of the Risen Christ | Glasgow | A rating |
| Community of the Sisters of the Church | Gerrards Cross | A rating |
| COMMUNITY OWNED ASSET MANAGEMENT LIMITED | London | A rating |
| Community Places Limited | Huddersfield | A rating |
| Community Power Solutions Ltd | Bristol | A rating |
| Community relief foundation | birmingham | A rating |
| Community Renewal Trust | GLASGOW | A rating |
| Community Revival UK Limited | Manchester | A rating |
| Community Schools Trust | London | A rating |
| Community Security Trust | London | A rating |
| Community Southwark | London | A rating |
| COMMUNITY SPORT OUTREACH PROGRAMME LTD | DERBY | A rating |
| Community Therapeutic Services Ltd | Weston super Mare | A rating |
| Community Training Portal Limited | Luton | A rating |
| Community Transformers Empowerment Services | Wolverhampton | A rating |
| Community Transport Association | Manchester | A rating |
| Community Trust Network | Milton Keynes | A rating |
| Community Voices Matter Ltd. | Nottingham | A rating |
| Community Windpower Ltd | Frodsham | A rating |
| CommunityDevelopment Horizons Ltd | West Bromwich | A rating |
| Commusoft Ltd | London | A rating |
| Commvault Systems Ltd | Reading | A rating |
| Como Holdings (UK) Limited | London | A rating |
| Como No | London | A rating |
| Como1907ltd | Brighton | A rating |
| Comodex UK Limited | Kent | A rating |
| Comodo Living Ltd | Horbury | A rating |
| Comojo (UK) Limited Trading as COMO Metropolitan London | London | A rating |
| Compac Sorting Equipment Europe Ltd | Leicester | A rating |
| Compac UK Ltd | Wakefield | A rating |
| Compact Communications Limited T/A Potrika | London | A rating |
| Compact Personnel Ltd | Stockport | A rating |
| Compact Syngas Solutions Limited | Sandycroft | A rating |
| CompactGTL Ltd | London | A rating |
| Compagnie Francaise d'Assurance pour le Commerce Exterieur, Branch in UK (COFACE) | Watford | A rating |
| Compagnie Fruitiere UK Ltd | West Malling | A rating |
| Companial UK Ltd | Farnborough | A rating |
| Companies House | Cardiff | A rating |
| COMPANIES MANAGEMENT SYSTEM | LONDON | A rating |