| Admire Care Ltd | Stoke Poges | A rating |
| Admire Consultancy Services Ltd | Essex | A rating |
| Admire Healthcare T/A Apollo House | Northampton | A rating |
| ADMISSION NETWORK LTD | London | A rating |
| ADMITIR VERSATILE LTD | LONDON | A rating |
| ADMONGREL LTD | Weybridge, Surrey | A rating |
| Admost Limited | Ilford | A rating |
| ADNAMI LTD | London | A rating |
| Adnan Barbers (Sole Trader) | WEST MIDLANDS | A rating |
| ADNAN COLLECTION LTD | Birmingham | A rating |
| Adnan Cricket Academy Ltd | London | A rating |
| ADNAN PIZZAS LTD | Manchester | A rating |
| Adnan Raza T/A Danny's Barbershop | Maidenhead | A rating |
| ADNANS HYDE LTD T/a Adnans | Hyde | A rating |
| Adnitt Acoustics Services Limited | Epsom | A rating |
| ADNOC International UK Limited | London | A rating |
| Adnomics Ltd | Maidstone | A rating |
| ADOBE GROUP LIMITED | London | A rating |
| Adobe Properties Limited | Luton | A rating |
| Adobe Systems Europe Limited | Reading | A rating |
| Adolphus Care | Pinner | A rating |
| Adonai Care Services Ltd | Bournemouth | A rating |
| ADONAI SERVICES LIMITED | Kent | A rating |
| Adonis Smart Foods Ltd | LONDON | A rating |
| ADORA HOSPITALITY LTD | Portsmouth | A rating |
| ADORAI LIMITED | Harrow | A rating |
| ADORATE LTD | Luton | A rating |
| Adore Centre Ltd | London | A rating |
| Adore Church | Birmingham | A rating |
| ADORE DESIGNS YORKSHIRE LIMITED | Batley | A rating |
| Adore Smile Limited | Glasgow | A rating |
| Adoreboard Limited | Belfast | A rating |
| Adorn Beauty And Care Ltd T/A Adorn Beauty | Grays | A rating |
| Adorn Hair & Beauty Limited | High Wycombe | A rating |
| ADORN SPA LIMITED | WEMBLEY | A rating |
| ADP Architecture Limited | London | A rating |
| ADP Consulting & Engineering Ltd | London | A rating |
| ADP Security Systems Limited | Petersfield | A rating |
| ADPAD Group Ltd | South Brent | A rating |
| ADPL LLP | London | A rating |
| Adprime Ltd | London | A rating |
| ADQURA LIMITED | Milton Keynes | A rating |
| ADR NORTHWEST LIMITED | Northwich | A rating |
| Adraba B.O. UK Ltd | Milton Keynes | A rating |
| Adreamz Events Limited | Southall | A rating |
| ADRENALINE ALLEY LTD. | CORBY | A rating |
| ADRIAN GIBSON MUSIC PRODUCTIONS | SURREY | A rating |
| ADRIAN GRANT COMMERCIALS LTD | CRUMLIN | A rating |
| Adrian Hill Architects | London | A rating |
| ADRIAN MOYA LTD | Norwich | A rating |
| Adrian Wintle Racing Limited | Westbury-on-Severn | A rating |
| Adriana Ltd t/a The Priory Nursing & Residential Care Home | Monmouth | A rating |
| Adrianna papell Uk Ltd | Hatfield | A rating |
| ADRIATIC (UK) LTD | London | A rating |
| Adriatic Metals plc | Cheltenham | A rating |
| ADRIEL CARE LTD | POOLE | A rating |
| ADRINAI LTD | Greenwich | A rating |
| Adroit Accountants Limited | Ipswich | A rating |
| Adroit Accountax Ltd | london | A rating |
| ADROIT CONSULTING GROUP LTD | London | A rating |
| Adroitx Limited | London | A rating |
| Adroll UK Limited | London | A rating |
| ADROSONIC UK LIMITED | LONDON | A rating |
| ADS 1 LIVERPOOL LTD | Prescot | A rating |
| ADS AND SONS GLAZING LTD | OLDBURY | A rating |
| ADS COMPONENTS LIMITED | BARKING | A rating |
| Ads East London Limited T/A Oodles | London | A rating |
| ADS Group Limited | London | A rating |
| ADS Stores Limited | Galley Hill | A rating |
| ADS Structural Ltd | St Helens | A rating |
| Adsec Group | Romford | A rating |
| Adserve Ltd | Worcester | A rating |
| Adsilico Limited | Leeds | A rating |
| Adsum Technologies Ltd | London | A rating |
| ADSWIZZ LIMITED | London | A rating |
| Adtec Europe Ltd | Twickenham | A rating |
| ADTEK LIMITED | NEWCASTLE | A rating |
| Adthena Ltd | London | A rating |
| adthera bio Ltd | Birmingham | A rating |
| ADTRAN Europe Limited | Basingstoke | A rating |
| Adtran Networks (UK) Limited | York | A rating |
| ADUABAAH ENTERPRISE LTD | Liverpool | A rating |
| ADUKUS LAW LIMITED | London | A rating |
| Adult Transition Services ltd | Brackley | A rating |
| Aduna Ltd / TA Aduna Superfoods | London | A rating |
| Adur Health Partnership | Shoreham-By-Sea | A rating |
| Adura Energy Limited | London | A rating |
| ADUT Limited T/A Chaiiwala | Slough | A rating |
| ADV Brightware Manufacturing Ltd | Coventry | A rating |
| Advaita Limited T/a Chilham Castle | Canterbury | A rating |
| Advan Properties Limited | Morden | A rating |
| ADVANCE AGILITY LTD | Croydon | A rating |
| ADVANCE AI LTD | Abbotsley | A rating |
| Advance Automated Systems Limited | Newton Aycliffe | A rating |
| ADVANCE BAR SECURITY LTD | Harlow | A rating |
| Advance Cabling Solutions Ltd | Monifieth | A rating |
| ADVANCE CARE PROVIDER LIMITED | Essex | A rating |
| ADVANCE COLLEGE OF BUSINESS AND TECHNOLOGY LIMITED | London | A rating |
| Advance Dental Centre | Aberdeen | A rating |
| Advance Dental Ltd T/A Advance Dental Care | HOUNSLOW | A rating |
| ADVANCE EDUCATION GROUP LTD | London | A rating |
| Advance engineering uk ltd | kings lynn | A rating |
| Advance Global Capital Limited | London | A rating |
| Advance Grid Solutions Limited | Bellshill | A rating |
| Advance HE | York | A rating |
| Advance Heating & Electricals Ltd | Harrow | A rating |
| Advance Home Care Ltd T/A Carewatch Kingston & Merton | Mitcham | A rating |
| Advance International Media Ltd | London | A rating |
| Advance Management (UK) LTD | Salford | A rating |
| ADVANCE MARKETING (PVT) LTD | Manchester | A rating |
| Advance Media Ltd | London | A rating |
| Advance Metals LTD | Birmingham | A rating |
| Advance Motors Limited | Slough | A rating |
| ADVANCE PHYSIOTHERAPY GROUP LTD | Solihull, | A rating |
| Advance Property Limited | Milton Keynes | A rating |
| Advance Shipping Limited | London | A rating |
| Advance Social Care Ltd | Burnley | A rating |
| ADVANCE SOLUTIONS CORP LTD | Belfast | A rating |
| ADVANCE TASTE LTD T/A TANDOORI NIGHT | Essex | A rating |
| ADVANCE WATER TREATMENT TECHNOLOGIES LIMITED | Leighton Buzzard | A rating |
| Advanced Aerial Mapping Services Ltd | London | A rating |
| Advanced 365 Limited | Birmingham | A rating |
| Advanced Accelerator Applications (UK & Ireland) Limited | London | A rating |
| Advanced Aesthetics Partners Ltd | London | A rating |
| Advanced Auto Technik Limited | Slough | A rating |
| Advanced Automobile Solutions Ltd | Northwich | A rating |
| Advanced Avionics Ltd | Westerham | A rating |
| Advanced Beauty Clinic and Training Ltd. | London | A rating |
| ADVANCED BEAUTY MEDICAL LTD | London | A rating |
| ADVANCED BROADCAST SERVICES LIMITED | London | A rating |
| Advanced Building & Maintenance Services Limited | Aveley | A rating |
| Advanced Care | Coventry | A rating |
| ADVANCED CARE (NI) LTD | Lisburn | A rating |
| Advanced Care Yorkshire LTD | Hull | A rating |
| Advanced Compressor Engineering Services Limited | Wallingford | A rating |
| Advanced Consulting Service Limited | Mansfield Woodhouse | A rating |
| Advanced Control Solutions Ltd | Pirbright | A rating |
| Advanced Couplings Limited | Keighley | A rating |
| Advanced Dental Laboratories Limited | Birmingham | A rating |
| ADVANCED DESIGN TECHNOLOGY LIMITED | LONDON | A rating |
| Advanced Development & Safety Laboratories Limited | Paignton | A rating |
| Advanced Diagnostics Limited | Nuneaton | A rating |
| Advanced Dyeing Solutions LTD | Batley | A rating |
| Advanced Electric Machines Limited | Washington | A rating |
| Advanced Electric Machines Research Ltd | Washington | A rating |
| Advanced Electronics Limited | Newcastle upon Tyne | A rating |
| Advanced Emergency Vehicles ( AEV ) | Cleckheaton | A rating |
| Advanced Engine Research Ltd | Basildon | A rating |
| Advanced Engineering Group Ltd | OMAGH | A rating |
| Advanced Fabrications (London) Ltd | Hanwell, London | A rating |
| ADVANCED FLOURISH CARE LIMITED | Chatham | A rating |
| Advanced Hair Studios Group Ltd | London | A rating |
| Advanced Healthcare Ltd | Tonbridge | A rating |
| Advanced Humanitarian Solutions | London | A rating |
| Advanced Infrastructure Technology Limited | Nantwich | A rating |
| Advanced Innergy Ltd | Gloucester | A rating |
| Advanced Innergy Solutions Ltd | Gloucester | A rating |
| Advanced Instruments Ltd. | Wimborne | A rating |
| Advanced Interior Solutions Limited | London | A rating |
| Advanced Labelling Systems Limited | Thame | A rating |
| Advanced Logistics for Aerospace (UK) Ltd | Esher | A rating |
| Advanced Manufacturing Control Systems (UK) Ltd | Nuneaton | A rating |
| Advanced Manufacturing Limited | ROTHERHAM | A rating |
| Advanced Manufacturing(Sheffield) Ltd | Rotherham | A rating |
| Advanced Markets (UK) Limited | London | A rating |
| ADVANCED MEDCARE LTD | LEEDS | A rating |
| Advanced Medical Solutions Limited | Winsford | A rating |
| Advanced Metal Innovation Co. Ltd | Sheffield | A rating |
| Advanced Micro Devices (U.K.) Limited | CAMBRIDGE | A rating |
| ADVANCED MOLECULAR DIAGNOSTICS LTD | Nottingham | A rating |
| ADVANCED MUSCULOSKELETAL ULTRASOUND LTD | Dartford | A rating |
| Advanced nationwide ltd | Birmingham | A rating |
| Advanced Personnel Management Group (UK) Ltd | Birmingham | A rating |
| Advanced Plastics | Hull | A rating |
| Advanced Propulsion Centre UK Ltd | London | A rating |
| Advanced Proteins Unlimited | Stoke-on-Trent | A rating |
| Advanced Renewable Power Ltd | Washington | A rating |
| Advanced Research and Invention Agency (ARIA) | London | A rating |
| ADVANCED SEALED UNITS LIMITED | HATFIELD | A rating |
| Advanced Seals & Gaskets Ltd | Dudley | A rating |
| Advanced Secure Technologies Ltd | Cardiff | A rating |
| Advanced Sensors Limited | Carrickfergus | A rating |
| Advanced Shopfront & Shutters Limited | West Drayton | A rating |
| Advanced Solutions International (Europe) Ltd | Shoreham by Sea | A rating |
| ADVANCED STUDY LTD | Manchester | A rating |
| Advanced Supply Chain Group Limited | Telford | A rating |
| ADVANCED TECHNOLOGY FOR INFORMATION SYSTEMS SOLUTIONS UK LIMITED (15373821) | ENGLAND | A rating |
| Advanced Technology Services UK Limited | London | A rating |
| Advanced Therapeutic Materials Ltd T/A Isobar Compression | Manchester | A rating |
| Advanced Tooling Systems UK Ltd | MAIDSTONE | A rating |
| Advanced Vision Technology Limited | Marlow | A rating |
| Advanced Visualisation Technologies Ltd T/A Digital Autopsy UK | Sheffield | A rating |
| ADVANCEMENT GATEWAY UK LTD | Ilford | A rating |
| AdvanceNet Europe Limited | Berkshire | A rating |
| Advancing Analytics Ltd | London | A rating |
| Advancy Limited | London | A rating |
| Advanex Europe Limited | Southwell | A rating |
| Advania UK Limited | Manchester | A rating |
| Advanse Limited | London | A rating |
| Advansys Engineering Services and Consultancy Limited | Camberley | A rating |