| Clontara Ltd. | Belfast | A rating |
| Close Brothers Group plc | London | A rating |
| Close Brothers Rail Ltd | Wickford | A rating |
| Close House Limited | Hatch Beauchamp | A rating |
| CLOSE THE DEAL ENT LTD | London | A rating |
| CLOSE TO NEXT-GEN LTD | Helensburgh, Scotland | A rating |
| Closed Loop Medicine Ltd | London | A rating |
| Closehill Lane Stores | Huddersfield | A rating |
| Closer Care Services | Leicester | A rating |
| CloserStill Group Limited | London | A rating |
| cloth restaurant group | London | A rating |
| Clothe and Feed | newcastle upon tyne | A rating |
| Clothes2order Ltd | Manchester | A rating |
| Clothing Care DC Ltd | Loughton | A rating |
| Clothing Care London Ltd | London | A rating |
| Clothing Manufacturing Corporation Limited | Teddington | A rating |
| Cloud & Compliance Ltd | Birmingham | A rating |
| CLOUD 9 BEDS LIMITED | Huddersfield | A rating |
| Cloud Agri LTD | Manchester | A rating |
| Cloud Aiops Consulting Ltd | Swindon | A rating |
| Cloud Analytics Limited | Bexleyheath | A rating |
| Cloud Army UK Limited | Harrow | A rating |
| Cloud Aware Services Ltd | London | A rating |
| Cloud Bleu Management Services Limited | Hampshire | A rating |
| Cloud Bridge Technologies Limited | Manchester | A rating |
| Cloud Capital LLP | London | A rating |
| Cloud Combinator LTD | Shenfield | A rating |
| CLOUD COMPUTING SERVICES LTD | Livingston | A rating |
| Cloud Construction Control Limited | Motherwell | A rating |
| Cloud Consulting Group Ltd | Bristol | A rating |
| CLOUD CX LTD | London | A rating |
| Cloud Cycle Ltd | London | A rating |
| CLOUD DATA CONSULTANTS LTD | Slough | A rating |
| Cloud Digest Ltd | Oxted | A rating |
| Cloud Digital Limited | Hinckley | A rating |
| CLOUD DOING GOOD GROUP LIMITED | West Wycombe | A rating |
| Cloud Flicker Solutions Ltd | Beaconsfield | A rating |
| Cloud Galacticos | London | A rating |
| Cloud Imperium Games Limited | Manchester | A rating |
| CLOUD IX KITCHENS LTD | UXBRIDGE | A rating |
| Cloud Kitchen London Ltd T/AS Hyderabad Wala {House of Biryani} | London | A rating |
| Cloud Lending UK Ltd | London | A rating |
| Cloud Logics Ltd | BROMLEY | A rating |
| Cloud Made Ltd | London | A rating |
| CLOUD MANAGER LIMITED | Reading | A rating |
| Cloud Mantra Limited | New Barnet | A rating |
| Cloud Master Limited | Reading | A rating |
| Cloud Ninjas Limited | Halesowen | A rating |
| CLOUD ODYSSEY IT SOLUTIONS LTD | London | A rating |
| CLOUD RETAIL LTD | London | A rating |
| Cloud SG UK Ltd | London | A rating |
| CLOUD TAX LIMITED | London | A rating |
| CLOUD TECHEES LTD | Ipswich | A rating |
| Cloud Technologies Ltd | Ilford | A rating |
| Cloud Travel Limited | Southall | A rating |
| Cloud Valley Ltd | Stratford | A rating |
| Cloud21 Limited | West Malling | A rating |
| Cloud23 UK IT Consulting Services Ltd | Aylesbury | A rating |
| Cloud9 Insight Ltd (TRADING ADDRESS) | Brighton | A rating |
| CloudAttribution Ltd | London | A rating |
| CloudBees UK Limited | London | A rating |
| CLOUDBRAIN SOLUTIONS LIMITED | Ilkeston | A rating |
| CLOUDBUNCH LIMITED | Dartford | A rating |
| CloudClevr Limited | Cheltenham | A rating |
| Cloudera (UK) Limited | London | A rating |
| CloudEvoque Limited | Redhill | A rating |
| Cloudex Consulting Limited | Woodford Green | A rating |
| CloudFactory International Limited | Reading | A rating |
| CLOUDFIRST TECHNOLOGIES LTD | CHELMSFORD | A rating |
| Cloudflare Limited | London | A rating |
| Cloudfm Integrated Services Limited | Colchester | A rating |
| CloudGuard Limited | Manchester | A rating |
| Cloudhive Limited | Epsom | A rating |
| CloudHQ UK Limited | London | A rating |
| CLOUDIFIE LIMITED | LONDON | A rating |
| Cloudignyte Ltd | Marlow | A rating |
| Cloudinary UK Limited | London | A rating |
| CloudIt Solutions Limited | Romford | A rating |
| Cloudkeepers London Ltd | London | A rating |
| CloudLearn Ltd | Glasgow | A rating |
| CloudMind AI Limited | Bromley | A rating |
| CloudNC Ltd | London | A rating |
| CloudNet Technologies Limited | Manchester | A rating |
| CLOUDNINE IT Services Limited | Sutton | A rating |
| Cloudone Consultancy Services Ltd | Watford | A rating |
| Cloudorizon Ltd | Harrogate | A rating |
| CloudPay Technology Limited | Andover | A rating |
| Cloudperfect Limited | London | A rating |
| CLOUDPILAR LIMITED | Bristol | A rating |
| CLOUDPLEXO LTD | London | A rating |
| Cloudreach Europe Limited | London | A rating |
| CLOUDROCK PARTNERS LTD | London | A rating |
| Cloudsale Consulting Limited | Hexham | A rating |
| Cloudscouts Technology Services UK Ltd | Slough | A rating |
| Cloudsculpts Solutions Ltd | Harrow | A rating |
| Cloudsec Systems Ltd | Crawley | A rating |
| Cloudsharp Consultancy Services Limited | Slough | A rating |
| CLOUDSHOP LIMITED | London | A rating |
| CLOUDSMAN IT SOLUTIONS LIMITED | London | A rating |
| Cloudsmart Consulting Ltd | London | A rating |
| Cloudsmith Ltd | Belfast | A rating |
| CloudSource Ltd | Loughborough | A rating |
| CloudTamers Limited | Cheltenham | A rating |
| CLOUDTECH COMMUNICATIONS LTD | Reading | A rating |
| CLOUDTECH INNOVATIONS LTD | Cambridge | A rating |
| Cloudtech24 Ltd | Woking | A rating |
| CloudThing Limited | Northfield | A rating |
| CLOUDWDAY LTD | London | A rating |
| Cloudwick Technologies UK | Kent | A rating |
| Cloudworkz limited | London | A rating |
| CLOUDXACT LTD | London | A rating |
| Cloudxcel Ltd | Bracknell | A rating |
| Cloughbane Farm Foods Limited | Dungannon | A rating |
| Cloux Ltd | London | A rating |
| Clove Leaf Ltd T/A Purple Flame | Stanmore | A rating |
| CLOVE MART GLOBAL LTD | London | A rating |
| Clovelly Estate Company Limited | Bideford | A rating |
| Clovelly House Care Home Limited | Newquay | A rating |
| Clovelly Path Limited | London | A rating |
| Clovely Care Ltd | Sunderland | A rating |
| CLOVER CAFE LIMITED | Greasby | A rating |
| Clover Care Group Limited | Chelmsford | A rating |
| Clover Care Scotland Ltd | East Lothian | A rating |
| Clover Health and Homecare | Bristol | A rating |
| CLOVER HEALTHCARE LIMITED | Corby | A rating |
| Clover Polo Ltd | Bracknell | A rating |
| Clover Pubs Holdings NI Limited | Belfsat | A rating |
| CLOVER SUPPORT GROUP LTD | Harlow | A rating |
| Clovercare Scotland Ltd | HADDINGTON | A rating |
| Clowdy Limited | London | A rating |
| Clowne Town Cricket Club | Chesterfield | A rating |
| Clowns Nursery Care Limited | London | A rating |
| CLP Group Limited | Cowbridge | A rating |
| CLP London Ltd | London | A rating |
| CLS Airline Supplies Limited | London | A rating |
| CLS Holdings PLC | London | A rating |
| CLS Money Limited | Rayleigh | A rating |
| CLS UK Intermediate Holdings Ltd | London | A rating |
| CLSA (UK) | London | A rating |
| Clstr Ltd | London | A rating |
| Cluaran HCS Limited | Stirling | A rating |
| Club 91 LTD t/a Dear Darling | London | A rating |
| Club Bauhaus Limited | London | A rating |
| Club Caribbee Ltd | London | A rating |
| Club Cultured Ltd | Ealing | A rating |
| Club Health Ltd | London | A rating |
| Club Kaede Limited | London | A rating |
| Club L (Retail) Limited | Manchester | A rating |
| Club Med S.A.S | London | A rating |
| CLUB SPORTS GROUP MASTER FRANCHISE LTD | LONDON | A rating |
| Club Travel Limited | Wakefield | A rating |
| ClubCom International Limited | London | A rating |
| Clubspark Group Limited | London | A rating |
| Clubsuperior Limited t/a Cicchetti | Radyr | A rating |
| CLUBSZONE CZ LIMITED | LEICESTER | A rating |
| Cluckandsmash Limited | London | A rating |
| CLUCKERS LTD T/A CLUCKERS | ILFORD | A rating |
| CLUEDIN UK LTD | Brentford | A rating |
| Clues Ltd | MANCHESTER | A rating |
| Clumber Bars Ltd. T/A Bistro 66 | Beeston | A rating |
| CLUMSY CHAIR HOSPITALITY LTD | Hayes | A rating |
| Cluster Greens Limited | London | A rating |
| CLUTCH EUROPE LTD. | London | A rating |
| Cluttons LLP | London | A rating |
| Clwyd and Snowdonia Domiciliary Specsavers Limited | Mold | A rating |
| Clwyd Compounders Ltd | Wrexham | A rating |
| CLX Professionals UK Limited | Guildford | A rating |
| Clydach Cricket Club | Swansea | A rating |
| Clyde & Co LLP | London | A rating |
| Clyde Biosciences Limited | Newhouse | A rating |
| Clyde Care Ltd | Wallington | A rating |
| Clyde Care Ltd | London | A rating |
| Clyde Court Care Home | Clydebank | A rating |
| Clyde Dental Practice Limited | Glasgow | A rating |
| Clyde Design Partnership Limited | Glasgow | A rating |
| CLYDE IMPORTERS (SCOTLAND) LIMITED | Glasgow | A rating |
| Clyde Injury Clinic Ltd | Greenock | A rating |
| Clyde Marine Recruitment Ltd | Glasgow | A rating |
| CLYDE ROAD NEWS | BRIGHTON | A rating |
| Clyde Solicitors Ltd T/A Clyde Solicitors | Barking | A rating |
| Clyde Space Ltd | Glasgow | A rating |
| CLYDE TRADE LIMITED | Glasgow | A rating |
| Clyde Ventures Limited | Glasgow | A rating |
| Clydebank Grocers Ltd t/a Clydebank Grocers | Glasgow | A rating |
| Clydebank Specsavers Hearcare Limited | Glasgow | A rating |
| Clydesdale Bank PLC | Glasgow | A rating |
| Clydesdale Cricket Club | Glasgow | A rating |
| Clydesdale Pharma Ltd | Tadley | A rating |
| CLYDESIDE PROPERTIES LIMITED | Port Glasgow | A rating |
| CLYDEVIEW MEDICAL PRACTICE | RENFREW | A rating |
| Clymed Healthcare Limited | Elstree | A rating |
| CM AGRICULTURE (LINCOLNSHIRE) LIMITED | Sleaford | A rating |
| CM AGRICULTURE LIMITED | Norwich | A rating |
| CM Bespoke Care Ltd | Cleobury Mortimer | A rating |
| CM Biryani Ltd t/a Chennai's Marina | Edinburgh | A rating |
| CM CLOUD & DEVOPS LTD | London | A rating |
| CM Community Care Services Ltd | Wolverhampton | A rating |
| CM Delta Ltd | London | A rating |
| CM GEOMATICS LIMITED | Taunton | A rating |
| CM Group Investment Limited | Sunbury-On-Thames | A rating |