| CURRYDOR LIMITED | Oxford | A rating |
| Currys Group Limited | London | A rating |
| Currys in Style LTD | Sheffield | A rating |
| CURRYWALA LIMITED T/A JEWEL IN THE CROWN | CASTLE DOUGLAS | A rating |
| Curryz House Ltd | Leeds | A rating |
| Curryzma UK Ltd | Sutton | A rating |
| Curshaw Ltd | Wheathampstead | A rating |
| Cursive AI Limited | London | A rating |
| Cursor Controls Ltd | Newark | A rating |
| Cursor Ltd | Lincoln | A rating |
| Curtains & Linens ltd | Princes Risborough | A rating |
| Curtains And Linens Outlet Ltd | Luton | A rating |
| Curtins Consulting Limited | Liverpool | A rating |
| Curtis Bros Fitness | Lanark | A rating |
| Curtis Fishing | Lochgilphead | A rating |
| Curtis Instruments (UK) Ltd | Northampton | A rating |
| Curtis Law Solicitors Limited | Blackburn | A rating |
| Curtis Wool Direct Limited | Bingley | A rating |
| Curtis,Mallet-Prevost, Colt & Mosle LLP | London | A rating |
| Curtiss-Wright Wimborne Limited | Wimborne | A rating |
| Curvature Group Ltd | Leighton Buzzard | A rating |
| Curve Analytics Limited | London | A rating |
| Curve Digital Publishing Limited | London | A rating |
| Curve Media Limited | London | A rating |
| Curve Royalty Systems Ltd | London | A rating |
| CURVE SIDE BISTRO LTD | London | A rating |
| Curve Therapeutics Ltd | Southampton | A rating |
| Curve UK Limited | London | A rating |
| Curve Workplaces Limited | Bracknell | A rating |
| Curved Stone Ltd | London | A rating |
| Curvolt Ltd | Cardiff | A rating |
| Curzon Advisers Ltd | London | A rating |
| Curzon and Company LLP | London | A rating |
| Curzon Cinemas Ltd | London | A rating |
| CURZON DEVELOPMENTS LTD | Woodford Green | A rating |
| Curzon Maritime Limited | London | A rating |
| Curzon Point Limited | Hertfordshire | A rating |
| Curzon PR Limited | London | A rating |
| Curzon Street Dental Practice | Maryport | A rating |
| Curzon Street Partners Limited | London | A rating |
| Cushman & Wakefield Debenham Tie Leung Limited | London | A rating |
| Cushty Bites Ltd | Ayr | A rating |
| Cusp AI Limited | Cambridge | A rating |
| Custodian 360 Ltd | Wokingham | A rating |
| Custodian Care Ltd | Coulsdon | A rating |
| Custom & Contract Power Solutions (CCPS) Ltd | Rosyth | A rating |
| CUSTOM CAR MATS LTD | Bradford | A rating |
| CUSTOM HOME CARE LTD. | SHEFFIELD | A rating |
| Custom Materials Ltd T/A Moteefe | London | A rating |
| Custom Pharmaceuticals Ltd | Hove | A rating |
| Custom Security Solutions Limited | London | A rating |
| Custom Sight & Sound Ltd | Essex | A rating |
| Customer Plus | Duffield | A rating |
| Customer Value Engineering Ltd | Newbury | A rating |
| Customers Wellcome Ltd | London | A rating |
| Customertimes UK Limited | London | A rating |
| Customised Security Limited | London | A rating |
| CUSTOMIZED COMMUNITY SUPPORT LTD | Willenhall | A rating |
| CUSTOMS CLEARANCE LIMITED | FELTHAM | A rating |
| Customuse Limited | London | A rating |
| CUSTORIS LTD | Coventry | A rating |
| CUSTOS TRADING LTD | LONDON | A rating |
| Cut Masterz Ltd | Feltham | A rating |
| Cut Price Autocentre Ltd | Southall | A rating |
| Cut the Mustard (Holdings) Limited | Biddulph | A rating |
| CUTE GIRL FASHION LTD | Leicester | A rating |
| CUTE HAIR & BEAUTY SALON LTD | Birmingham | A rating |
| CUTERA Limited | Wokingham | A rating |
| Cutfield Freeman & Company Limited | London | A rating |
| Cutie Pies Nursery Ltd | London | A rating |
| Cutlass Security Group Ltd | Ilford | A rating |
| Cutler and Gross Limited | London | A rating |
| CUTMASTER BARBER SHOP | London | A rating |
| CUTPRICE STORE LIMITED | LONDON | A rating |
| CUTRIGHT LTD | Colchester | A rating |
| CUTSOLUTIONS LTD | NEWCASTLE UPON TYNE | A rating |
| Cutthorpe Cricket Club | Chesterfield | A rating |
| CUTTING EDGE (SETS) LIMITED | Barking | A rating |
| CUTTING EDGE FM LIMITED | BEDFORDSHIRE | A rating |
| Cutting Edge Music (Holdings) Ltd | LONDON | A rating |
| Cutting Edge Podiatry Ltd | Cambridge | A rating |
| Cutting Edge Precision Engineering Ltd | Huntingdon | A rating |
| Cutting Line Solution | London | A rating |
| Cutting-Hedge.com Ltd | Woking | A rating |
| Cuvama Limited | London | A rating |
| Cuvva Limited | London | A rating |
| Cuzzies Properties Ltd | Worcester | A rating |
| CV Bramhall ltd T/A Cafe Valentino | Bramhall | A rating |
| CV Europe | Solihull | A rating |
| CV One Limited | Birmingham | A rating |
| CV-Library Ltd | Fleet | A rating |
| CV1 HOSPITALITY LIMITED | Coventry | A rating |
| CVA Corporate Value Associates UK Limited | London | A rating |
| CVC Advisers Limited | London | A rating |
| CVC Services LTD | Aylesbury | A rating |
| CVC SUPPLIES LTD | Blackburn | A rating |
| Cvent Europe Limited | London | A rating |
| CVI Ltd | Manchester | A rating |
| CVK INFOTECH LTD | Watford | A rating |
| CVP Global Services Ltd | London | A rating |
| CVS Group Plc | Diss | A rating |
| CVS RETAIL LTD T/A SHELL FUEL STATTION | BUTTINGTON | A rating |
| CW & DK Limited | Ripon | A rating |
| CW Aberdeen Limited | Aberdeen | A rating |
| CW B3 Wood Wharf Limited | London | A rating |
| CW City Ltd T/As Chaiiwala | Glasgow | A rating |
| CW DUNDEE LTD T/As Chaiiwala | Dundee | A rating |
| CW Food & Wine Limited | London | A rating |
| CW Holborn Limited T/A Chaiiwala | London | A rating |
| CW Midlands Limited T/A Wingers | Solihull | A rating |
| CW Quay Ltd T/A Chaiiwala | Glasgow | A rating |
| CW Subs Ltd T/A Subway | Chelmsley Wood | A rating |
| CW+ | London | A rating |
| CWA Accountants Limited | London | A rating |
| CWA International Ltd | London | A rating |
| CWF & Partners Ltd | Croydon | A rating |
| CWF KIDS UK LIMITED | London | A rating |
| CWG Markets Ltd | London | A rating |
| Cwm Cartref Care Home | Pontardawe | A rating |
| Cwm Taf Morgannwg University Health Board | Abercynon | A rating |
| Cwmbran Village Surgery | Cwmbran | A rating |
| Cwmbran Visionplus Limited t/a Specsavers | Cwmbran | A rating |
| cwmbwrla dental practice | swansea | A rating |
| Cwmdu Express | Swansea | A rating |
| Cwmni Da Cyf | Caernarfon | A rating |
| Cwmni Theatr Arad Goch | Aberystwyth | A rating |
| Cwmni'r Fran Wen | Bangor | A rating |
| CWMPHIL LIMITED | Swansea | A rating |
| Cwmtawe Medical Group | Swansea | A rating |
| CWOB UK Ltd | London | A rating |
| CWRT BLEDDYN TRADING LTD T/A Cwrt Bleddyn Hotel and Spa | Ickenham | A rating |
| Cwrt Malle Ltd | Carmathen | A rating |
| CWS ENGINEERING LIMITED | Somerset | A rating |
| CWS Farm Limited | Battle | A rating |
| CWSH CWS & College of Esports Limited | London | A rating |
| Cwt Tatws Cyf | Gwynedd | A rating |
| CWT UK Group Ltd | Potters Bar | A rating |
| Cwtsh Hostel Ltd | Carmarthen | A rating |
| CX Studios Limited | Watford | A rating |
| CXC GLOBAL EMEA UK LIMITED | Kings Langley | A rating |
| CXControls Limited | Mochdre | A rating |
| CXG UK Ltd | London | A rating |
| cxz fenwick limited | fenwick | A rating |
| CY London Limited | Newport Pagnell | A rating |
| CY Shipping UK ltd | London | A rating |
| CY UK LTD | Sutton Coldfield | A rating |
| Cyan Subsea UK Ltd | Aberdeen | A rating |
| CyanConnode Limited | Cambridge | A rating |
| Cyanetics Ltd. | Stevenage | A rating |
| CyanoCapture | Oxford | A rating |
| Cyanwood Limited | London | A rating |
| CYBAGE SOFTWARE UK LIMITED | London | A rating |
| Cybake Limited | York | A rating |
| CybaVerse LTD | Chichester | A rating |
| CybelAngel UK Limited | Marylebone | A rating |
| Cyber Alarm Limited | London | A rating |
| Cyber Prism Limited | London | A rating |
| Cyber Range Ltd | London | A rating |
| Cyber Security Hub Ltd | London | A rating |
| CYBER SHEKU LIMITED | LONDON | A rating |
| Cyber Strategies Ltd | Potters Bar | A rating |
| Cyber-Ark Software (UK) Limited | London | A rating |
| Cyber-Weld | Southam | A rating |
| CYBERCAFE TRADING LTD. | Hayes | A rating |
| CyberCube Analytics Europe Limited | London | A rating |
| CYBERDD LIMITED | LONDON | A rating |
| CYBERDD LTD | LONDON | A rating |
| CYBERDOG UK LIMITED | London | A rating |
| Cyberfort Group | Berkshire | A rating |
| Cyberhawk Innovations Ltd | Ratho, Newbridge | A rating |
| CyberIAM Holdings Limited | Chester | A rating |
| Cyberlens Ltd | Old Harlow | A rating |
| CYBERLIVER LIMITED | Manchester | A rating |
| CYBERLYSMART SERVICES LIMITED | London | A rating |
| CYBEROWL LIMITED | BIRMINGHAM | A rating |
| CyberRATSS Ltd | Swindon | A rating |
| CYBERREY LTD | London | A rating |
| CYBERSECURE365 UK LTD | London | A rating |
| CyberShadows Intel Ltd | Lincoln | A rating |
| Cyberstaff Ltd | London | A rating |
| Cybersys Technologies Ltd | London | A rating |
| Cybertots at Acton Gardens Ltd | London | A rating |
| CYBERTOTS AT COPLEY CLOSE CHILDREN`S CENTRE LTD | London | A rating |
| Cybertots at GWQ | Middlesex | A rating |
| Cybertots Ltd | London | A rating |
| Cybertots on the Green | London | A rating |
| CYBERWAVE IT LIMITED | Radlett | A rating |
| Cybrace Limited | London | A rating |
| Cybsafe Limited | London | A rating |
| Cyclana Bio Limited | Cambridge | A rating |
| CYCLE LINK (UK) LIMITED | Essex | A rating |
| CYCLE OF LIFE LTD | Liverpool | A rating |
| Cycle Pharmaceuticals Limited | Cambridge | A rating |
| Cyclehoop LImited | London | A rating |
| Cyclic Solutions Limited | Banbury | A rating |
| Cyclife UK Limited | Workington | A rating |
| Cycling Scotland | Glasgow | A rating |
| Cyclon Ltd T/A Cyclon Food & Wine | Greenford | A rating |
| Cyclone Robotics UK Limited | London | A rating |
| Cyclops Marine Ltd | Portsmouth | A rating |