| ARALICONSULTS LIMITED | Dartford | A rating |
| Aralon Advisory Services Limited | London | A rating |
| Aram International Food Centre Ltd | Northampton | A rating |
| ARAM PETROLEUM UK LIMITED | LONDON | A rating |
| Aramar Solutions Limited | London | A rating |
| Aramark Ltd | Leeds | A rating |
| Aramco Overseas Company UK Ltd | LONDON | A rating |
| Aramco Trading Limited | London | A rating |
| ARAMCO VENTURES LIMITED | London | A rating |
| ARAMEX (UK) LIMITED | Poyle | A rating |
| ARAMM LEGAL LTD | LONDON | A rating |
| ARANDEEP SINGH T/A PRUDHOE DENTAL PRACTICE | PRUDHOE | A rating |
| ARANJA LIMITED | WEST BROMWICH | A rating |
| Arapina bakery LTD | London | A rating |
| Aras Software Ltd | Birmingham | A rating |
| ARAVINTHAN SUNTHARALINGAM | HAVERHILL | A rating |
| ARAVINTHAN VADIVELU T/A LOCAL FOOD AND WINE | BIRMINGHAM | A rating |
| Arax Properties Limited | London | A rating |
| Araz Farm Feed Ltd | London | A rating |
| Araz Fish Ltd | Witham | A rating |
| ARB Accountants | Westcliff On Sea | A rating |
| ARB BESPOKE DECORATORS LTD | Enfield | A rating |
| ARB PLANNING LTD | Romford, | A rating |
| Arbaa Limited | Southall | A rating |
| Arbat Capital Advisory Services Ltd | London | A rating |
| ARBAZ&BRO LTD | Oldham | A rating |
| Arbion Limited | London | A rating |
| ARBITER RISK CORPS LIMITED | London | A rating |
| ARBIVA CONSULTANCY LIMITED | London | A rating |
| arbnco Ltd | Glasgow | A rating |
| ARBO BIOTECHNOLOGY | MARLOW | A rating |
| Arbor Education Partners Ltd | London | A rating |
| Arbor Networks UK Limited | London | A rating |
| Arborea Ltd | London | A rating |
| Arboretum Hotels Ltd | Derby | A rating |
| Arboretum Nursing Home Limited | Walsall | A rating |
| Arbour Partners LLP | London | A rating |
| ARBOURTHORNE LIMITED | SOUTH YORKSHIRE | A rating |
| Arbrack Farming Co | Newton Stewart | A rating |
| Arbroath Football Club | Arbroath | A rating |
| Arbroath Medical Practice LLP | Arbroath | A rating |
| Arbroath Specsavers Limited T/A Specsavers Opticians | Arbroath | A rating |
| Arbroath United Cricket Club | Arbroath | A rating |
| Arbtech Consulting Ltd | Chester | A rating |
| Arbtech Services Ltd | Bretton | A rating |
| ARBUDA LIMITED | Crawley | A rating |
| ARBURY MEDICAL CENTRE NUNEATON | NUNEATON | A rating |
| Arbuthnot Banking Group | London | A rating |
| ARC & SONS HOLDINGS LIMITED | London | A rating |
| ARC Aerosystems Limited | Cranfield | A rating |
| Arc Bio Communications Limited | London | A rating |
| ARC CAPITAL MANAGEMENT LTD | London | A rating |
| ARC CARE LTD | Swindon | A rating |
| ARC Club Limited | London | A rating |
| ARC Community Care Ltd | Blackpool | A rating |
| Arc Connect Limited | London | A rating |
| ARC Consultancy and Media Limited | Cumbernauld | A rating |
| ARC Dental Surgery | Blackpool | A rating |
| ARC Engineering LTD | Ilford | A rating |
| ARC ENVIRONMENTAL LIMITED | CO DURHAM | A rating |
| ARC Gateway Limited | Crowthorne | A rating |
| ARC INSIGHTS LTD | Rickmansworth | A rating |
| Arc Inspirations Limited | Leeds | A rating |
| ARC International Design Consultants UK Limited | London | A rating |
| ARC marine | Torquay | A rating |
| Arc Media Holdings Limited | London | A rating |
| Arc Pharma (UK) Limited | St Albans | A rating |
| ARC PHARMA UK LIMITED | St Albans | A rating |
| Arc Property Services Partnership Ltd | Nottingham | A rating |
| ARC Ratings | London | A rating |
| Arc Simulations Ltd | London | A rating |
| ARC Smile Ltd t/a Espie and Hill Dental Practice | East Lothian | A rating |
| ARC Solutions Pvt Ltd | Bracknell | A rating |
| Arc Support Solutions Ltd | London | A rating |
| ARCA HEALTH LIMITED | Oldbury | A rating |
| Arca Living Ltd | Birmingham | A rating |
| Arca Trade Group Ltd | Rayleigh | A rating |
| Arcade (U K) Ltd | Kimbolton | A rating |
| Arcade Films London Ltd | London | A rating |
| Arcade Ltd | London | A rating |
| ARCADE NEWSAGENTS | MERSEYSIDE | A rating |
| Arcade Opco Limited | London | A rating |
| Arcade Talent Agency | London | A rating |
| ARCADIA CARE HOMES | NEWPORT | A rating |
| Arcadia Care No 1 Ltd | Wolverhampton | A rating |
| Arcadia Impact | London | A rating |
| Arcadia Missa | London | A rating |
| Arcadia Pharma Ltd | Swansea | A rating |
| Arcadia University | Holborn | A rating |
| Arcadian Industries LTD | Redditch | A rating |
| Arcadis Human Resources Limited | London | A rating |
| Arcadis LLP | London | A rating |
| ARCADYAN TECHNOLOGY LIMITED | Ipswich | A rating |
| Arcapita Investment Advisors UK Limited | London | A rating |
| Arcare Boscobel Holdings Limited | Southport | A rating |
| Arcare Hub Limited | Wolverhampton | A rating |
| Arcare Residential Care Limited | Wolverhampton | A rating |
| Arcare Woodlands Limited | Southport | A rating |
| ARCASOFT UK LTD | Glasgow | A rating |
| ARCE CLIMA UK LTD | LONDON | A rating |
| ArcelorMittal Construction UK Ltd | Rowley Regis | A rating |
| ArcelorMittal Distribution Solutions UK Ltd | Willenhall | A rating |
| ArcelorMittal Kent Wire Ltd | CHATHAM | A rating |
| ArcelorMittal Limited | LONDON | A rating |
| ArcelorMittal Shipping Ltd | London | A rating |
| Arceo Ltd | London | A rating |
| Arceptive Limited | Glagow | A rating |
| Arcese UK Ltd | Tilbury | A rating |
| Arcesium UK LLP | London | A rating |
| Arch Ai Technologies Ltd | London | A rating |
| Arch Community Services Ltd | LEEDS | A rating |
| ARCH Emerging Markets Partners Limited | London | A rating |
| ARCH FUTURES LTD | Leicester | A rating |
| Arch Global UK Limited | Coventry | A rating |
| Arch Homes and Support ltd | Leicester | A rating |
| Arch Inspection Services | Solihull | A rating |
| Arch Insurance (UK) Limited | London | A rating |
| Arch News NCL Limited T/A Arch News | Newcastle upon Tyne | A rating |
| ARCH NINE INTERNATIONAL LIMITED | Leicester | A rating |
| Arch Rivals Brewing Company Ltd. | Worcester | A rating |
| ARCH TECHNOLOGY LTD | Wembley | A rating |
| Arch UK Biocides Limited | Castleford | A rating |
| ARCH Venture Management UK Ltd | London | A rating |
| Arch West Midlands Ltd | West Midlands | A rating |
| Archaeolog Brython Archaeology CYF | Bangor | A rating |
| Archaeological Management Solutions Ltd (AMS) | York, | A rating |
| Archaeological Research Services Ltd | Bakewell | A rating |
| Archana and Dhwani Limited | Wakefield | A rating |
| Archangel Autonomy Ltd | Oxford | A rating |
| Archangel Clinic Ltd | London | A rating |
| Archangel Enterprises | Stafford | A rating |
| Archangel Foods Limited T/A German Doner Kebab | London | A rating |
| Archangel Healthcare Ltd | Clacton on Sea | A rating |
| Archangel Lightworks Ltd | Oxford | A rating |
| Archax Holdings Ltd. | London | A rating |
| Archbird Limited | Chessington | A rating |
| Archbishop beck catholic college | Liverpool | A rating |
| Archbishop of York | York | A rating |
| Archbishop Sentamu Academy | Hull | A rating |
| Archbishop Temple Church of England High School | Preston | A rating |
| Archdiocese of Cardiff-Menevia | Cardiff | A rating |
| Archdiocese of Glasgow | Glasgow | A rating |
| Archdiocese of Liverpool | Liverpool | A rating |
| Archdiocese of St Andrews & Edinburgh | EDINBURGH | A rating |
| ARCHE HOMES LTD | Ilford | A rating |
| Archea Spaces Ltd | Milton Keynes | A rating |
| ARCHELLA GROUP LTD T/A PERFORMALYTICS | Abingdon | A rating |
| ARCHER (UK) LIMITED | Aberdeen | A rating |
| Archer Aviation UK Limited | Bristol | A rating |
| Archer Daniels Midland (UK) Limited | Erith | A rating |
| Archer Daniels Securities Limited | London | A rating |
| Archer Hotel Capital B.V. | London | A rating |
| Archer Humphryes | London | A rating |
| Archer Humphryes International Ltd | London | A rating |
| Archer Media UK Ltd | Blaydon-on-Tyne | A rating |
| Archer Offshore | Fareham | A rating |
| Archer Technicoat Ltd | High Wycombe Bucks | A rating |
| Archer Technologies UK Limited | Bristol | A rating |
| Archers Health care Ltd | Kings Lynn | B rating |
| Archery Pictures Limited | London | A rating |
| Archestra Limited | London | A rating |
| Archi Capital Limited | London | A rating |
| Archibald Frame Limited | Crieff | A rating |
| Archibald Shaw LLP | Chichester | A rating |
| Archiclad UK Limited | London | A rating |
| Archie Express | London | A rating |
| Archie's Sons Ltd T/A Tribe | Oxford | A rating |
| Archies Express Desserts LTD | Washington | A rating |
| Archies Stores Ltd / Archies News Food and Wine | Washington | A rating |
| Archigrace Ltd | Maidenhead | A rating |
| Archilizer Ltd | London | A rating |
| Archimydes Pvt Ltd | Alton | A rating |
| ARCHINCAD LTD | EDGWARE | A rating |
| Archinno Ltd | Raynes Park | A rating |
| Archipel & Co Limited | Cambridge | A rating |
| Archipelago Technology Group Ltd | CAMBRIDGE | A rating |
| Archipelagos Gyros Limited | Brighton | A rating |
| ARCHIT CONSULTANCY SERVICES LTD | BATH | A rating |
| Archit Pharma Innovations Ltd | Maidenhead | A rating |
| Architects Registration Board | London | A rating |
| Architectural Association School of Architecture | London | A rating |
| ARCHITECTURAL METALWORK GROUP LIMITED | LONDON | A rating |
| Architectural Survey Consultants Ltd. | Basingstoke | A rating |
| Architecture Assembly Ltd | London - UK | A rating |
| Architecture for London | London | A rating |
| Architecture North Ltd | Nottingham | A rating |
| Architecture Unknown Limited | Manchester | A rating |
| Architecture00 | London | A rating |
| ArchitecturePLB | Winchester | A rating |
| ARCHIZONE SITE SERVICES LTD | Epping | A rating |
| ARCHLOC4 LIMITED | Leicester | A rating |
| Archna Ltd | Urmston | A rating |
| Archr LLP | London | A rating |
| Archroll Ltd | Betchworth | A rating |
| Archroma UK Ltd | Bradford | A rating |
| Archton Consulting Services Limited | Milton Keynes | A rating |
| Archus | Bristol | A rating |
| Archway Design Services Ltd | Minster | A rating |
| Archway Fitness Limited | London | A rating |
| Archway Green Ltd | Addlestone | A rating |