| CHUTZPAH PROPERTIES LTD | London | A rating |
| Chuwee Bubble Limited | Winchester | A rating |
| Chypons Residential Home | Penzance | A rating |
| CI Games UK Limited | London | A rating |
| CI Precision Ltd | Salisbury | A rating |
| CI STUDY LTD | London | A rating |
| Ci&T UK Limited | London | A rating |
| Ciao Amore Pvt Ltd t/a Ciao Amore Ristorante | Taunton | A rating |
| Ciao Bella Restaurant Limited | London | A rating |
| CIAO CIAO ITALIA LIMITED | LONDON | A rating |
| Ciao Ciao Knightsbridge C/O Shezan Restaurant | London | A rating |
| Ciao Paolo Limited T/as Dentistry @ Jordanhill | Stirling | A rating |
| Ciao Roma Restaurants Limited | Edinburgh | A rating |
| CIAR Property Services Ltd | Teddington | A rating |
| CIARAN & VICKI MCCAUSLAND T/A THE BREWERS HOUSE | DUNGANNON | A rating |
| Ciaro LTD | Birmingham | A rating |
| CIB Representative Office London | London | A rating |
| CIB Restaurant and Bar Ltd | KENDAL | A rating |
| Cibao La Pampa Polo Team | Maidenhead | A rating |
| CIBI LIMITED | LONDON | A rating |
| Cibo Manchester | Manchester | A rating |
| Cibo Stortford Ltd | Bishops Stortford | A rating |
| Cibosano Ltd. | Waltham Cross | A rating |
| CIBT UK Ltd | London | A rating |
| Cibus Capital LLP | London | A rating |
| CICA Solutions Ltd | Lincoln | A rating |
| Ciceley Commercials | Blackburn | A rating |
| Cichetti Ltd | Burnley | A rating |
| Ciclozone Limited | Lichfield | A rating |
| Ciconia Recovery Ltd | London | A rating |
| CICOR HARTLEPOOL LTD | Hartlepool | A rating |
| CID Civil & Surfacing Ltd | Harlow | A rating |
| CIEE Study Abroad London Ltd | London | A rating |
| Ciel Hotels Limited | Penrith | A rating |
| Cielo Talent Ltd | London | A rating |
| CIELO WINDOWS & DOORS LTD | London | A rating |
| CIELO WINDOWS AND DOORS LTD | London | A rating |
| Ciena Limited | London | A rating |
| Cierco Ltd | London | A rating |
| Ciesco Ltd | London | A rating |
| CIF Limited | London | A rating |
| CIFC Asset Management Europe Ltd | London | A rating |
| Cigkofte Foods Limited | London | A rating |
| CIGMA CONSTRUCTION LTD | London | A rating |
| CIGMA TRADING LIMITED | Ilford | A rating |
| CIGNA EUROPEAN SERVICES (UK) LIMITED | Glasgow | A rating |
| Cigniti Technologies (UK) Limited | London | A rating |
| CIHS Ltd | Cranleigh | A rating |
| Ciklum Operations UK Limited | London | A rating |
| Ciko Hygiene Services Limited | London | A rating |
| CIL Pearson Ham Limited | London | A rating |
| CIL Strategy Consultants | London | A rating |
| Cilantro Engineering UK | London | A rating |
| Cilantro Putney Ltd | London | A rating |
| CIM Software Ltd | Southampton | A rating |
| CIMA CARE (BURTON) LTD | Burton | A rating |
| Cima Care Consortium Ltd | Nottinghamshire | A rating |
| CIMA CARE CONSORTIUM LTD | Sutton Coldfield | A rating |
| CIMAR (UK) Ltd | London | A rating |
| Cimar Limited | Milton Keynes | A rating |
| CIMAS Consulting Group Ltd | London | A rating |
| CIMB Bank Berhad | London | A rating |
| CIMC Universal Tank Technologies (UK) Ltd | Skelmersdale | A rating |
| Cimcon Software (UK) Limited | Reading | A rating |
| Cimcorp UK Ltd | Warwick | A rating |
| Cimentalia (UK) Limited | Northampton | A rating |
| Cimlogic Ltd | Saltaire | A rating |
| Cimolai (UK) Ltd | London | A rating |
| CIMOLAI-RIMOND (UK) LLP | Cheshire | A rating |
| Cimpina Ltd | Belfast | A rating |
| Cimple Limited | London, | A rating |
| CIMPOR UK LIMITED | Avonmouth, Bristol | A rating |
| Cimpress (UK) Limited | London | A rating |
| CIMTech Limited | Cardiff | A rating |
| Cincom Systems (UK) Limited | Maidenhead | A rating |
| CINDEL LOGISTICS LTD | Southampton | A rating |
| Cinder Restaurants Limited T/A Cinder | London | A rating |
| CINDERFORD GRILL & PERI PERI LTD | Cinderford | A rating |
| Cinderford Phones Ltd | Gloucestershire | A rating |
| CINDERFORD STORE | Cinderford,Gloucestershire | A rating |
| Cinderhill Pharmacy Limited | Nottingham | A rating |
| CINDY & C LTD | Cambridge | A rating |
| Cindy Care Limited | Bedford | A rating |
| CineArk Limited | Wooburn Green | A rating |
| CINEDREAMFILMS LTD | London | A rating |
| Cineflix Rights Limited | London | A rating |
| Cinegearpro Limited | London | A rating |
| Cinegy Ltd | Bristol | A rating |
| Cinema Printing Company London Ltd. | Aylesford | A rating |
| CINEMA8 LIMITED | Cambridge | A rating |
| Cinematic Limited | Cardiff | A rating |
| CINEMATICS BY TAHA LTD | Huddersfield | A rating |
| Cinemersive Labs Ltd | London | A rating |
| Cineon Training Limited | Exeter | A rating |
| CINER GLASS LTD | LONDON | A rating |
| Cinesite VFX Ltd | London | A rating |
| Cineworld Cinemas Limited | Brentford | A rating |
| Cingulait Limited | London | A rating |
| Cinik Hair Care Ltd. | LONDON | A rating |
| CINNA RR LTD | Southall | A rating |
| CINNAMON (CHESHIRE) LTD T/a Cinnamon | Altrincham | A rating |
| CINNAMON BAR & RESTAURANT | Chessington | A rating |
| Cinnamon Bay | Yateley | A rating |
| CINNAMON BILLINSGHURST LTD | BILLINGSGHURST | A rating |
| Cinnamon Collection Limited | London | A rating |
| CINNAMON COURT FOOD GROUP LTD | walsal Birmingham | A rating |
| Cinnamon Culture | Bromley | A rating |
| Cinnamon Garden | Ebbw Vale | A rating |
| CINNAMON KITCHEN | SUNDERLAND | A rating |
| Cinnamon of Menai Bridge Ltd T/A Taste of India | Wales | A rating |
| Cinnamon On The Lane LTD T/A Cinnamon | London | A rating |
| Cinnamon Restaurant | Epping | A rating |
| CINNAMON RESTAURANT LIMITED | Crawley | A rating |
| Cinnamon Spice (Silverdale) Limited TA Cinnamon Spice | Carnforth | A rating |
| Cinnamon Tree Cardiff Ltd | Cardiff | A rating |
| CINNAMON VILLAGE LTD | London | A rating |
| Cint UK Limited | London | A rating |
| Cintelli Limited | Kent | A rating |
| Cintobi Limited | Dagenham | A rating |
| Cintra Corporation UK Ltd | WOTTON-UNDER-EDGE | A rating |
| CINTRACKS LTD TA Cintracks Taxi & Private Hire | Reading | A rating |
| Cintre | Bristol | A rating |
| Cinven Limited | London | A rating |
| CIO Management Services Ltd | London | A rating |
| CIP FS UK LTD. | Rotherham | A rating |
| CIP LONDON LIMITED | London | A rating |
| cip Marketing Ltd. | Nottingham | A rating |
| CIP PLATFORM SOLUTIONS UK LTD. | Rotherham | A rating |
| CIP TERRA TECHNOLOGIES UK LTD. | Rotherham | A rating |
| Cipher Corp Management Ltd | Warwick | A rating |
| Cipher International Limited | Sheffield | A rating |
| Ciphr Limited | Reading | A rating |
| Cipla (EU) Limited | Addlestone | A rating |
| Circadia Technologies Ltd | London | A rating |
| Circadian Lighting Ltd | Stanley | A rating |
| Circana (UK) Ltd | Bracknell | A rating |
| Circet UK limited | Slough | A rating |
| Circle | London | A rating |
| Circle 13 Limited | London | A rating |
| Circle Cloud Communications Ltd | SOUTHAMPTON | A rating |
| Circle Gas Limited | London | A rating |
| Circle Interactive Ltd | Bristol | A rating |
| Circle Leaf Ltd | Coulsdon | A rating |
| Circle One Limited t/a C1 Tech | London | A rating |
| Circle Property Partnership Limited | London | A rating |
| Circle Square Agency Ltd | London | A rating |
| CIRCLE UK GROUP LTD | Cheshunt, Weltham Cross | A rating |
| Circle UK Trading Ltd | London | A rating |
| CircleCi UK Limited | London | A rating |
| Circolombia Ltd | London | A rating |
| Circuit Link Electrical Ltd | Luton | A rating |
| Circuit Mind | London | A rating |
| Circuit Routing Limited | London | A rating |
| CircuitByte Ltd T/a CircuitWorx | Salisbury | A rating |
| CircuitHub Limited | Petersfield | A rating |
| Circular Bioeconomy Alliance | London | A rating |
| CIRCULAR CARE LTD | Essex | A rating |
| CIRCULAR ECOLOGY LTD | Hove | A rating |
| Circular Economy Services Ltd | London | A rating |
| CIRCULAR GROOVE LTD | London | A rating |
| Circularity Capital LLP | EDINBURGH | A rating |
| Circulor Ltd | London | A rating |
| Circus Day Nursery | Cheltenham | A rating |
| Circus Ginnett | Tilney St Lawrance | A rating |
| Circus of Horrors | London | A rating |
| Circus of Horrors ltd | London | A rating |
| CIRCUS RECORDS LIMITED | LONDON | A rating |
| Circus World Entertainment Ltd | Wickham | A rating |
| Circusful | Belfast | A rating |
| Cirdan Imaging Limited | Lisburn | A rating |
| Cirencester Health Group | Cirencester | A rating |
| Cirera Capital Limited | London | A rating |
| Cirka UK | London | A rating |
| Cirrico Ltd | London | A rating |
| Cirrus Logic International Semiconductor Limited | Edinburgh | A rating |
| Cirrus Ltd | Portadown | A rating |
| Cirrus Nexus Ltd | London | A rating |
| Cirrus Research plc | Hunmanby | A rating |
| CIRS SERVICE MANAGEMENT LTD | LONDON | A rating |
| CIS London & Partners LLP | London | A rating |
| CIS Security Ltd | London | A rating |
| CISCA LIMITED | LUTON | A rating |
| Cisco International Limited | Cardiff | A rating |
| Ciscoes Catering Ltd | Norwich | A rating |
| Ciscore Limited | MILTON KEYNES | A rating |
| CISDI UK LTD | SHEFFIELD | A rating |
| Cisilion Ltd. | Leatherhead | A rating |
| Cision Group Limited | London | A rating |
| Cistercian Monastery Nunraw | Haddington | A rating |
| CIT Digital Ltd | Sheffield | A rating |
| CITAC Africa Limited | London | A rating |
| Citadel Accounting UK Limited | London | A rating |
| Citadel Enterprise Europe Limited | London | A rating |
| Citadel.london Ltd | London | A rating |
| CITATION CYBER LIMITED | Lancaster | A rating |
| Citco London Ltd | London | A rating |
| CiteAb Ltd. | Bath | A rating |
| CiTECH Energy Recovery Solutions UK Ltd. | Hessle | A rating |
| Citi Group | London | A rating |
| Citi Group (Kent) Limited T/A Citi Terrace | Canterbury | A rating |