| Cloudreach Europe Limited | London | A rating |
| Cloudsale Consulting Limited | Hexham | A rating |
| Cloudsmith Ltd | Belfast | A rating |
| Cloudwick Technologies UK | Kent | A rating |
| CLS UK Intermediate Holdings Ltd | London | A rating |
| CLSA (UK) | London | A rating |
| Clyde & Co LLP | London | A rating |
| CM TELECOM UK LTD | Tonbridge | A rating |
| CMA CGM (UK) Shipping Limited | Liverpool | A rating |
| CMC Marine Ltd | Poolle | A rating |
| CMC Markets UK Plc | London | A rating |
| CMG (EUROPE) LTD | WALLINGFORD | A rating |
| CML Microsystems Plc | Maldon | A rating |
| CMR UK Ltd | Wallsend | A rating |
| CMS Cameron Mckenna Nabarro Olswang LLP | London | A rating |
| CNA Insurance Company Limited | London | A rating |
| CNBC (UK) Limited | London | A rating |
| CNC - Communications & Network Consulting Limited | London | A rating |
| CNH INDUSTRIAL N.V. | Basildon | A rating |
| CNOOC Petroleum Europe Limited | Uxbridge | A rating |
| CNOOC U.K. Marketing Limited | London | A rating |
| CNPC EUROPE AND NORTH AMERICA LIMITED | London | A rating |
| CNR International (UK) Limited | Aberdeen | A rating |
| Coach Stores Limited | LONDON | A rating |
| Coalfire Systems Limited | Manchester | A rating |
| Coalition Development Ltd | London | A rating |
| Coalition for Epidemic Preparedness Innovations UK Limited | London | A rating |
| Coalition Risk Solutions Ltd. | London | A rating |
| COATS LIMITED | London | A rating |
| Coatue Europe Limited | London | A rating |
| Cobalt Consulting (UK) Ltd | London | A rating |
| Cobalt Labs UK Limited | Hammersmith, London | A rating |
| Cobb Europe Ltd | Colchester | A rating |
| COCA-COLA EUROPACIFIC PARTNERS HOLDINGS GREAT BRITIAN LIMITED | Middlesex | A rating |
| Coca-Cola HBC NI Ltd | Lisburn | A rating |
| Cochlear Europe Limited | Addlestone | A rating |
| Cockroach Labs UK Limited | London | A rating |
| Coda Octopus Martech Limited | Portland | A rating |
| Codal LTD | Lincoln | A rating |
| Codasip UK Limited | Cambridge | A rating |
| Code 42 Software UK Limited | Maidenhead | A rating |
| Codegen Ltd | London | A rating |
| Codehouse Limited | London | A rating |
| Coefficient Giving UK | London | A rating |
| Coforge U.K. Limited | London | A rating |
| COFRA London Limited | London | A rating |
| Cogent Breeding Limited | Aldford | A rating |
| Cognex UK, Ltd | Birmingham | A rating |
| Cognizant Worldwide Limited | London | A rating |
| Cohen & Gresser (UK) LLP | London | A rating |
| Coherent Scotland Ltd | Glasgow | A rating |
| Cohesity International UK Limited | London | A rating |
| CoinShares Capital Markets (UK) Limited | London | A rating |
| ColArt International Holdings Ltd | London | A rating |
| Colas Limited | Birmingham | A rating |
| Colas Rail Limited | London | A rating |
| Coleman Research Limited | Reading | A rating |
| COLESCO CAPITAL LTD | London | A rating |
| ColganBauer UK Limited | London | A rating |
| Colgate-Palmolive (UK) Ltd | Woking | A rating |
| COLLABORATION BETTERS THE WORLD UK LIMITED | London | A rating |
| Collaboration Betters the World UK Ltd | London | A rating |
| Collaborative Solutions Europe Limited | London | A rating |
| Collective IQ Group Ltd | London | A rating |
| Coller Capital Ltd | London | A rating |
| Collibra UK Ltd | London | A rating |
| Colliers International Property Consultants Limited | London | A rating |
| Coloplast Limited | Peterborough | A rating |
| Colorcon Limited | Dartford | A rating |
| Colt Technology Services Group Limited | London | A rating |
| Columbia Pictures Corporation Limited | London | A rating |
| Columbus Global UK Ltd | Nottingham | A rating |
| Comau U.K. Limited | Rugby | A rating |
| Command Alkon Ltd | Bristol | A rating |
| Commerce Decisions Ltd | Abingdon | A rating |
| Commerce Software UK LTD | London | A rating |
| Commerzbank AG | London | A rating |
| Commissioning Agents International UK Ltd | Reading | A rating |
| Commissum Associates Limited | Edinburgh | A rating |
| Commonwealth Bank of Australia | London | A rating |
| CommScope Connectivity UK Ltd | London | A rating |
| Community Counselling Service (UK) Limited | London | A rating |
| Commvault Systems Ltd | Reading | A rating |
| Como Holdings (UK) Limited | London | A rating |
| Compac Sorting Equipment Europe Ltd | Leicester | A rating |
| Compagnie Francaise d'Assurance pour le Commerce Exterieur, Branch in UK (COFACE) | Watford | A rating |
| Company 3 Studios UK Ltd | London | A rating |
| Compass Group Plc | Chertsey | A rating |
| Compass Group UK & Ireland Limited Registered Office | Chertsey | A rating |
| COMPASS Pathfinder Limited | London | A rating |
| Compass Plus (GB) LTD | Nottingham | A rating |
| CompatibL Technologies Ltd | London | A rating |
| Compleo Charging Solutions UK Limited | London | A rating |
| Complete Fertility Ltd | Eastleigh | A rating |
| Complus Asset Management (UK) Limited | London | A rating |
| Compre Services (UK) Limited | London | A rating |
| Compusoft GB Ltd | Ashby-de-la-Zouch | A rating |
| Computacenter (UK) Ltd | Hatfield | A rating |
| Computer Task Group (UK) LTD | Reading | A rating |
| Computershare Investor Services PLC | Bristol | A rating |
| comScore UK Ltd | London | A rating |
| comsec consulting uk ltd. | LONDON | A rating |
| Comviva Technologies Limited | London | A rating |
| Concentrix Catalyst Ltd | London | A rating |
| Concentrix Europe Limited | Belfast | A rating |
| Concentrix TSC UK Ltd | Larbert, | A rating |
| Concept Life Sciences, Integrated Discovery and Development Services Ltd. | High Peak | A rating |
| Concha Y Toro UK Ltd. | Wheatley | A rating |
| Concirrus Ltd | London | A rating |
| Concord Resources Limited | London | A rating |
| Concord UK Group Services Limited | London | A rating |
| Concord UK Group Services Ltd | London | A rating |
| Concur Technologies (UK) Limited | Feltham | A rating |
| Concurrent Technologies Plc | Colchester | A rating |
| Conductor Founders UK Limited | West Wickham | A rating |
| Conduent Business Process Solutions Limited | London | A rating |
| Conduktor UK Limited | London | A rating |
| Conex Universal Limited | Kingswinford | A rating |
| Configure One Europe Ltd | London | A rating |
| Confluent Europe Ltd | London | A rating |
| CONGA EUROPE LTD | London | A rating |
| Congenica LTD | Cambridge | A rating |
| Conjecture Ltd | London | A rating |
| Connaught (UK) Limited | London | A rating |
| Connect 44 Ltd | Bracknell | A rating |
| ConnectWise Ltd | London | A rating |
| Conning Asset Management Ltd | London | A rating |
| CONNOR CLARK & LUNN UK LIMITED | LONDON | A rating |
| ConocoPhillips (U.K.) Holdings Limited | London | A rating |
| Conroy Baker Ltd. | Hull | A rating |
| ConsenSys Systems UK Limited | Nether Alderley | A rating |
| Consertus UK Ltd | London | A rating |
| Consilio Global (UK) Limited | London | A rating |
| Consolidated Contractors International (UK) Ltd | London | A rating |
| Consolidated Minerals Limited | London | A rating |
| Constantia FFP Ltd | Northampton | A rating |
| CONSTELLATION GENERATION LIMITED | LONDON | A rating |
| Constellium UK Limited | Uxbridge | A rating |
| Construction Specialties ( U.K.) Limited | Aylesbury | A rating |
| Consulta Limited | London | A rating |
| Contamac Limited | Essex | A rating |
| CONTEC CLEANROOM (UK) LIMITED | Ashington | A rating |
| Contemporary Travel Solutions Limited | Manchester | A rating |
| CONTENT+CLOUD LIMITED | Manchester | A rating |
| Contenur UK Limited | Nelson | A rating |
| Contiem Limited | Sutton | A rating |
| Contiki Services Ltd | Bromley | A rating |
| Continental Engineering Services Limited | Lichfield | A rating |
| Continental Tyre Group Ltd | Datchet | A rating |
| Contitech UK Ltd | Wigan | A rating |
| Contour Technologies Limited | Gloucester | A rating |
| ContourGlobal Solutions (Northern Ireland) Limited | Lisburn | A rating |
| Control Risks Group Limited | London | A rating |
| Control Techniques Dynamics Limited | Andover | A rating |
| Control vs Exposed UK Limited | London | A rating |
| ControlCase Limited | London | A rating |
| Contxt Ltd | London | A rating |
| ConvaTec Ltd | Deeside | A rating |
| Convene UK Holdings Limited | London | A rating |
| Conveo.ai UK Ltd | Altrincham | A rating |
| Convera UK Limited | London | A rating |
| Convergint Technologies UK, Limited | Crowborough | A rating |
| Convergix UK Ltd | Arbroath | A rating |
| Convex Services Limited | London | A rating |
| Convex UK Services Limited | London | A rating |
| Conviva Ltd | Cheltenham | A rating |
| Cookpad Limited | Bristol | A rating |
| Cooley (UK) LLP | London | A rating |
| Coolr Ltd | London | A rating |
| Cooper Square Technologies UK Ltd | London | A rating |
| Cooper-Standard Automotive UK Limited | Coventry | A rating |
| CooperVision Manufacturing Limited | Fareham | A rating |
| Coople (UK) Limited | London | A rating |
| COPA90 Limited | London | A rating |
| Copenhagen Offshore Partners A/S, UK Branch | Edinburgh | A rating |
| CopyBet UK Limited | London | A rating |
| Copyright Administration Services Limited | Pewsey | A rating |
| Copyright Agency of China-UK Limited | London | A rating |
| Coralogix UK Limited | London | A rating |
| CORBUS EUROPE LTD | Harrow | A rating |
| Corcentric Limited | London | A rating |
| Cordel Group PLC | London | A rating |
| Corebridge Institutional Investments (Europe) Limited | London | A rating |
| CoreData Research Ltd | London | A rating |
| CORELIGHT UK LTD | Reading | A rating |
| CoreLogic Solutions Limited | Shirley, Solihull | A rating |
| Coremont LLP | London | A rating |
| COREMONT PARTNERSHIP SERVICES LIMITED | London | A rating |
| Coreweave UK Limited | London | A rating |
| Corgan Ltd | London | A rating |
| Corient Services Limited | London | A rating |
| Corin Limited | Cirencester | A rating |
| Corinth Pipeworks UK Limited | Hartlepool | A rating |
| CORNELIUS UK LTD | LONDON | A rating |
| Cornerstone OnDemand Limited | London | A rating |
| Cornerstone Research UK Limited | London | A rating |
| Coros UK Limited | London | A rating |
| COROS WEARABLES UK LTD | Skipton | A rating |
| Corporate & Accelerator Solutions LLP | London | A rating |
| Corporate Research and Investigations Limited | London | A rating |