| APT Accountants LLP | London | A rating |
| APT Business Private Limited | South Shields | A rating |
| APT Care Limited | Luton | A rating |
| Apt Care Options Ltd | Rugby | A rating |
| apt Design Ltd | Wigston | A rating |
| APT GLOBAL SOLUTIONS LTD | MILTON KEYNES | A rating |
| APT LOCUM LTD | London | A rating |
| APT Scaffolding Limited | Brentford | A rating |
| Apt Works Limited | London | A rating |
| Aptamer Group PLC | York | A rating |
| ApTap LTD | London | A rating |
| Aptar UK Limited | Leeds | A rating |
| Aptem Ltd | London | A rating |
| Apteus Group Limited | Harrow | A rating |
| Aptex Limited | Solihull | A rating |
| Aptia UK Limited | London | A rating |
| Aptior Capital Services (UK) Limited | London | A rating |
| Aptitude Software Group plc | London | A rating |
| Aptiv Services UK Limited | Coventry | A rating |
| Apto DC Limited | London | A rating |
| Aptos Solutions UK Ltd | London | A rating |
| Aptura AI UK Ltd. | London | A rating |
| Aptus Legal Ltd | Leeds | A rating |
| Aptus Medicus Ltd | Enfield | A rating |
| Apuljack Engineering | East Brent | A rating |
| APV Trade Solution LTD | Sittingbourne | A rating |
| APVT Web Pvt Ltd | London | A rating |
| APWW LTD | Warrington | A rating |
| APX XPRESS LIMITED | London | A rating |
| APXCEL FREIGHT SERVICES LTD | Hounslow | A rating |
| APZ Electronics Ltd | Cardiff | A rating |
| APZ FOOD LIMITED | London | A rating |
| AQ Accountants Limited | London | A rating |
| AQ Retail Ltd | Paisley | A rating |
| AQ Wiring Systems Rockford Ltd | Rendlesham | A rating |
| AQ1442 Ltd | London | A rating |
| AQA Education | Manchester | A rating |
| Aqaa Foods Limited t/a Players | Bolton | A rating |
| Aqaab Ltd | Bradford | A rating |
| AQAL ENTERPRISE LTD | Slough | A rating |
| AQDOT LIMITED | Cambridge | A rating |
| AQEEL AKRAM YAQOOB TRADING AS PREMIER STORE | ABERTILLERY | A rating |
| AQF Trading Limited | Hainault | A rating |
| Aqffin Limited t/a Muku Hair Salon | London | A rating |
| AQG Traders LTD | Chesterfield | A rating |
| Aqilla Limited | Camberley | A rating |
| AQL INTERNATIONAL LTD | Bolton | A rating |
| AQLO LIMITED | London | A rating |
| AQM GLOS LTD | Gloucester | A rating |
| AQM Vibe Limited | Edinburgh | A rating |
| Aqovia UK Limited | London | A rating |
| Aqqa Convenience Store | Edinburgh | A rating |
| AQR Capital Management (Europe) LLP | London | A rating |
| AQS Business Solution Ltd | Chadderton | A rating |
| AQTAZ TRADING LIMITED | Manchester | A rating |
| Aqua Broadcast Limited | Epsom | A rating |
| AQUA COMMS Management (UK) Limited | London | A rating |
| AQUA FRESH PRODUCE LIMITED | Southall | A rating |
| AQUA GREEN CLEANING AND FACILITIES LTD | London | A rating |
| Aqua Interpreting Solutions Ltd | Batley | A rating |
| AQUA MEDICAL LABORATORIES LTD | London | A rating |
| AQUA OCEAN LTD | London | A rating |
| AQUA PHARMACY LTD | IPSWICH | A rating |
| Aqua Pyramid Ltd | London | A rating |
| Aqua Robson Care Ltd | West Thurrock | A rating |
| Aqua Security Software UK LTD | London | A rating |
| Aqua Superpower | London | A rating |
| Aqua Technologies (Europe) Ltd | Hounslow | A rating |
| AQUA VISTA BAR & GRILL LTD | Leicester | A rating |
| Aqua-Media International Limited | Wallington | A rating |
| Aquaberry Limited T/A Subway | Wembley | A rating |
| Aquabio Limited | Worcester | A rating |
| Aquabridge Limited | Felixstowe | A rating |
| Aquaclad UK Ltd | Glasgow | A rating |
| AQUACO WATER RECYCLING LIMITED | Kent | A rating |
| AQUAFARM EQUIPMENT (SCOTLAND) LIMITED | Glasgow | A rating |
| Aquaflo Limited | Harrow | A rating |
| Aquaforce Special Waste Ltd | Wolverhampton | A rating |
| Aquaforest Ltd | Aylesbury | A rating |
| Aquagen Scotland Limited | Stirling | A rating |
| AQUALONA PRODUCTS LIMITED | Potters Bar | A rating |
| Aquamare Marine Ltd | Plymouth | A rating |
| Aquamarine Oriental Limited | Epsom | A rating |
| AQUAMATCH WATER TREATMENT LIMITED | London | A rating |
| Aquanzo Ltd | Roslin | A rating |
| Aquapark Developments Limited T/A Prima Building Solutions Ltd | Sunninghill | A rating |
| AQUAPHOR UK LTD | Reading | A rating |
| AQUAPURITY LTD | Nottingham | A rating |
| AquaQ Analytics | Belfast | A rating |
| Aquarium Software Limited | Altrincham | A rating |
| Aquarius Population Health | London | A rating |
| Aquark Technologies Limited | Eastleigh | A rating |
| Aquascapes Limited | Hornchurch, Essex | A rating |
| Aquascapes Ltd | Rayleigh | A rating |
| Aquascope Solutions Ltd | Worcester | A rating |
| Aquaship UK Limited | Lerwick | A rating |
| Aquasphinx Limited | Haywards Heath | A rating |
| Aquatec Group Ltd | Basingstoke | A rating |
| Aquatem Services Limited | Hamilton | A rating |
| Aquaterra Energy Ltd | Norwich | A rating |
| Aquatic Capital UK LLP | London | A rating |
| Aquatic Deepwater Ltd | London | A rating |
| Aquazzura UK Limited | London | A rating |
| Aquent LLC | London | A rating |
| Aquevo Ltd | London | A rating |
| Aquidata Excel Ltd | Blackburn | A rating |
| Aquila Interactive Limited | Warwick | A rating |
| Aquila Services Group plc | London | A rating |
| Aquila Supported Living Services | Northampton | A rating |
| AQUILA TRUCK CENTRES LIMITED | SANDBACH | A rating |
| Aquiline Capital Partners Limited | London | A rating |
| Aquinas Church of England Education Trust | Bromley | A rating |
| Aquinas College | Stockport | A rating |
| Aquinas Education Ltd | Nottingham | A rating |
| Aquince Accommodation Ltd | Wembley | A rating |
| Aquios Labs Ltd | Milton Keynes | A rating |
| AQUIS EXCHANGE LIMITED | London | A rating |
| Aquis Exchange PLC | London | A rating |
| Aquis Global Limited | London | A rating |
| AR & VS Limited | Bushey | A rating |
| AR ACCOUNTANCY SERVICES LIMITED | LONDON | A rating |
| AR Architecture Ltd | London | A rating |
| AR ASSETS PRIVATE LTD | London | A rating |
| AR Belfast Ltd | Newtownabbey | A rating |
| AR BRAND LTD | BRISTOL | A rating |
| AR BUILDING CONTRACTORS AND DOUBLE GLAZING LTD | Gravesend | A rating |
| AR Cars Services Ltd | London | A rating |
| AR Civils Ltd | Southall | A rating |
| AR Claims Management Ltd. | Birmingham | A rating |
| AR complete solutions limited | East Ham | A rating |
| AR Controls Ltd | Sunderland | A rating |
| AR Exchange Limited | Southall | A rating |
| AR Experts Limited | Manchester | A rating |
| AR EXPRESS IMPEX LTD | Woking, | A rating |
| AR FABRICATIONS UK LIMITED | West Drayton | A rating |
| AR First Ltd T/A Forde Dental | Dunbar | A rating |
| AR Fitness Ltd | Orpington | A rating |
| AR FM LTD | Birmingham | A rating |
| AR Food Group Limited | Larbert | A rating |
| AR FOOD SERVICES LTD | cwmbran | A rating |
| AR HOLISTIC THERAPIES | Bradford | A rating |
| AR HOSPITALITY LTD T/A SUBWAY | HEMEL HEMPSTEAD | A rating |
| AR INT LTD | Stockport | A rating |
| AR IT CONSULTANCY OF UK LIMITED | Liverpool | A rating |
| AR LDS Warrington Ltd T/A The Little Dessert Shop | Warrington | A rating |
| AR LEGAL CONSULTANTS LTD | Leicester | A rating |
| AR MANAGEMENTCONSULTANTS LIMITED | Ormskirk | A rating |
| AR Midlands Ltd | Walsall | A rating |
| AR Minimarket Ltd | Glasgow | A rating |
| AR MOBILES & TECHNOLOGY LTD | Ashby-De-La-Zouch | A rating |
| AR PHYSIOCARE PVT LTD | LONDON | A rating |
| AR Private Ltd | Glasgow | A rating |
| AR Removals Ltd | Wakefield | A rating |
| AR SHANKER LTD | Coventry | A rating |
| AR Smiles Dental Ltd | London | A rating |
| AR STYLE LIMITED | London | A rating |
| AR SUB Ltd | London | A rating |
| AR SUPERMARKET LTD | Birmingham | A rating |
| AR Tech Support Ltd | Slough | A rating |
| AR TELEVISION NETWORK LTD | London | A rating |
| AR TRANSPORT MIDLANDS LTD | Wednesbury | A rating |
| AR Windows & Glass Limited | Rochdale | A rating |
| Ar world ltd | London | A rating |
| AR1 HOMECARE LIMITED | Burslem | A rating |
| AR1 Trading Ltd T/A Pepe's Musselburgh | Edinburgh | A rating |
| AR18 | UXBRIDGE | A rating |
| Ar3x Ltd | Covent Garden | A rating |
| AR5 GROUP LIMITED,TA McDonald's | Blackburn | A rating |
| ARA & ARU LIMITED T/A LONDIS | Wallington | A rating |
| ARA CARE SERVICE LTD (t/a Dol Awel Residential Home) | Abergele | A rating |
| ARA Design (International) Limited | London | A rating |
| ARA Pasta Limited T/A Pasta Evangelists | London | A rating |
| ARA PL LTD | Plymouth | A rating |
| ARA RETAIL LTD T/A ESSO | London | A rating |
| ARA TECHNICAL LTD | Glasgow | A rating |
| ARAADIGIT LTD | Hemel Hempstead | A rating |
| ARAAV N LTD | EALING BROADWAY | A rating |
| Arab National Bank | London | A rating |
| Arabelle Services UK Limited | Warwickshire | A rating |
| Arabesque Asset Management Ltd | London | A rating |
| Arabia Monitor Limited | London | A rating |
| ARABIAN OUD COMPANY LIMITED | London | A rating |
| Arabic Grill Ltd. | New Malden | A rating |
| Arabica Borough Limited | London | A rating |
| ARABIYA LONDON LTD | London | A rating |
| Arachnys Information Services Limited | London | A rating |
| ARADA MINI MARKET | London | A rating |
| Aradhya Solution Limited | Solihull | A rating |
| Araf Coleshill Ltd T/A Indian Lounge | Birmingham | A rating |
| ARAFA LIMITED | London | A rating |
| ARAFAH ESTATE LIMITED | London | A rating |
| Arag PLC | CAERPHILLY | A rating |
| Aragawa UK Limited | London | A rating |
| Arain Traders Ltd | Kilmarnock | A rating |
| Araiz Properties Ltd | London | A rating |
| ARAKHA LIMITED | EDINBURGH | A rating |
| Araki London Limited | London | A rating |
| Arakot Limited t/a Mall Road | Essex | A rating |
| ARAL & CO INTEGRATED MANAGEMENT SERVICES LIMITED | London | A rating |
| Araldico Limited | London | A rating |