| AIDEN'S BARBER LIMITED | EAST WITTERING | A rating |
| Aidvante Consulting Group Ltd | Surrey | A rating |
| AIDWELL LIMITED | LONDON | A rating |
| AIE FOODS LTD | Coatbridge | A rating |
| AIESEC UK Ltd | London | A rating |
| AIForge Limited | London | A rating |
| AIG (AL) LTD | Sale | A rating |
| AIG Aesthetic Care Ltd | Walsall | A rating |
| Aigas Field Centre Ltd | Inverness-shire | A rating |
| Aigburth Community Church | Liverpool | A rating |
| Aigo Digital Repairs | Manchester | A rating |
| Aigostar International Limited | Hartlepool | A rating |
| AIHL Vehicle Hire Ltd | HIGH WYCOMBE | A rating |
| AIHOMES LIMITED | East Sussex | A rating |
| AIHUA LIMITED | Edinburgh | A rating |
| AIIA GLOBAL LTD | Keighley | A rating |
| AIIM RESEARCH AND TRAINING LTD | Canterbury, | A rating |
| AIIM Trading Ltd | Rotherham | A rating |
| Aiimi Ltd | Milton Keynes | A rating |
| AIISAR LTD | Croydon | A rating |
| Aijaz Baig Mughal | Reading | A rating |
| Aik Star Ltd | London, | A rating |
| Aiken Promotions Ltd. | Belfast | A rating |
| Aiko Store Limited | Delamere | A rating |
| Aikya Investment Management Limited | London | A rating |
| Ailean Chraggan Hotel | Aberfeldy | A rating |
| Ailsa Care Services Ltd | Edinburgh | A rating |
| Ailsa Craig Medical Practice | Manchester | A rating |
| AILUX GROUP LIMITED | LONDON | A rating |
| Aim 4 Hope CIC | Altrincham | A rating |
| AIM Advanced Mobility Ltd | Norwich | UK Expansion Worker: Provisional |
| AIM CONSTRUCTION LIMITED | PRESTON | A rating |
| AIM ENGINEERS LTD | Bristol | A rating |
| AIM HIGHER MARKETING & CONSULTING LTD | SKIPTON | A rating |
| AIM HomeCare | Fareham | A rating |
| AIM MARKETING LTD | Birmingham | A rating |
| AIM QUALITY LTD | LEEDS | A rating |
| AIM RX Ltd | Widnes | A rating |
| Aim Up | Cheltenham | A rating |
| Aim2Learn | Leeds | A rating |
| Aim2Learn Ltd | LEEDS | A rating |
| AIM8 LIMITED T/A Perfume Parlour | Leicester | A rating |
| AIMA INTERIORS (UK) LTD | LONDON | A rating |
| Aimah's Beauty LTD | Rossendale | A rating |
| AIMAL & CO. LTD | Harrow, | A rating |
| AIME HOLDINGS LTD | London | A rating |
| Aimee Grey t/a Cherry Bones Tattoo | Peacehaven | A rating |
| AIMEN GROUP LTD | MANCHESTER | A rating |
| AIMG UK Limited | London | A rating |
| AIMIMAGE LIMITED | London | A rating |
| Aimlin Limited | London | A rating |
| AIMPOINT DIGITAL UK LIMITED | London | A rating |
| AIMS CARE LIMITED | London | A rating |
| AIMS Education Limited | Essex | A rating |
| Aims Homecare Limited | Leatherhead | A rating |
| AIMS PETROLEUM LIMITED | Manchester | A rating |
| Aims Sales Ltd | Watford | A rating |
| AIMS Solutions UK Limited | Rickmansworth | A rating |
| Aims Star Ltd TA Cost Cutter | Bexleyheath | A rating |
| AIMS TRADER PRIVATE LIMITED T/A AIMS | SHIPLEY | A rating |
| AIMS TRADERS LIMITED | Swindon | A rating |
| Aimsecurity UK Ltd | London | A rating |
| AIMSS GROUP LTD | Kingston upon Thames | A rating |
| Aimsun Limited | London | A rating |
| AIMU TECH LTD | Rickmansworth | A rating |
| Ain Care Ltd | Cannock | A rating |
| AIN ESC UK LIMITED | LONDON | A rating |
| Aina Khan Law Ltd | London | A rating |
| Aingaran Somasuntharam T/A Acwin Enterprise | Manchester | A rating |
| Ainon Baptist Church | Cardiff | A rating |
| Ainsdale Court | St Helens | A rating |
| AINSDALE CRICKET CLUB | SOUTHPORT | A rating |
| Ainsdale Medical Centre | Ainsdale | A rating |
| Ainsley Saddlery Ltd | Hungerford | A rating |
| Ainsworths | Caterham | A rating |
| Aintu Limited T/A Union Business Finance | Hemel Hempstead | A rating |
| AIO LONDON LTD | London | A rating |
| AIO Partners Ltd | Leicester | A rating |
| AIODistribution Ltd | London | A rating |
| Aioi Nissay Dowa Insurance Management Limited | London | A rating |
| Aioli Limited, trading as Pierre Victoire | Oxford | A rating |
| Aiolos Bio Limited | London | A rating |
| Aion Silicon Ltd | London | A rating |
| Aionex Technologies Ltd | London | A rating |
| Aios Technology Ltd | Nottingham | A rating |
| AIP Management P/S | London | A rating |
| AIPHONE UK LIMITED | London | A rating |
| AiQ Consulting Limited | Cranfield | A rating |
| AIQAHS BOUTIQUE LTD | Bradford | A rating |
| AIQAHS BOUTIQUE NELSON LTD | Nelson | A rating |
| AIR (UK) LTD | Manchester | A rating |
| Air & Air Ltd | Watford | A rating |
| Air Algerie | London | A rating |
| Air and Dusk Ltd t/a The Millstone at Barnack | Stamford | A rating |
| Air Art Ltd | St. Albans | A rating |
| Air Astana JSC | London | A rating |
| Air Aware Labs Ltd | London | A rating |
| Air Bearings Ltd | Ferndown | A rating |
| Air Bubble Ltd | Essex | A rating |
| Air Business Ltd | Hatfield | A rating |
| Air Cargo Ltd | Colnbrook | A rating |
| Air Charter Scotland Limited | Glasgow | A rating |
| Air Charter Service Plc | Surbiton | A rating |
| Air China Limited | London | A rating |
| Air Design Limited | London | A rating |
| AIR FOR LIFE UK LTD | MILTON KEYNES | A rating |
| Air Handlers Northern Limited | Salford | A rating |
| Air India | Brentford | A rating |
| Air IT Ltd | Sandiacre | A rating |
| Air Liquide UK Ltd | Birmingham | A rating |
| Air Navigation Solutions Limited | Gatwick Airport | A rating |
| Air New Zealand Limited | London | A rating |
| Air One Aviation Limited | Kingston Upon Thames | A rating |
| Air Partner Limited | Gatwick | A rating |
| Air Peace Limited | West Sussex | A rating |
| Air Peace of Mind Limited | London | A rating |
| Air Products Plc | Guildford Road | A rating |
| Air Quality Consultants Ltd | Bristol | A rating |
| AIR RESOURCES LIMITED | Manchester | A rating |
| AIR SS LTD | Staines-upon-Thames | A rating |
| AIR Studios (Lyndhurst) Ltd | London | A rating |
| Air Technology Systems Ltd | Bromsgrove | A rating |
| Air Torque (UK) Limited | Coalville | A rating |
| AIR TRIPS LTD T/A AIR TRIPS | London | A rating |
| AIR Worldwide Ltd | London | A rating |
| AIR X UK LTD | Feltham | A rating |
| AIR-CON SERVICE LIMITED | Woodford Green | A rating |
| Air-Site Ltd | Poole | A rating |
| Aira Digital Limited | Milton Keynes | A rating |
| Aira Home UK Ltd | Stretford | A rating |
| AIRA TEXTILES LIMITED | Manchester | A rating |
| Airaa swaan ltd | Ipswich | A rating |
| Airah Enterprise Ltd | Hatfield | A rating |
| AIRBAGS INTERNATIONAL LIMITED | Congleton | A rating |
| Airbnb UK Limited | London | A rating |
| AIRBON LTD | Halstead | A rating |
| AIRBOOKINGS UK LTD T/A VIP Express | Hayes | A rating |
| Airborne Capital (UK) Limited | London | A rating |
| AIRBORNE ENVIRONMENTAL CONSULTANTS LTD | MANCHESTER | A rating |
| Airborne Representation Ltd t/a Skybreak | Gatwick Airport | A rating |
| AIRBORNE ROBOTICS Ltd | London, United Kingdom | A rating |
| Airbox Fulfilment Ltd | Hounslow | A rating |
| AIRBRIDGE CENTRE LIMITED | Birmingham | A rating |
| airbridge international agencies ltd | crawley | A rating |
| Airbus Belfast Limited | Belfast | A rating |
| Airbus Defence and Space Limited | Portsmouth | A rating |
| Airbus Helicopters UK Limited | Kidlington | A rating |
| Airbus Operations Limited | Bristol | A rating |
| Airbus Protect Limited | Bristol | A rating |
| Aircall UK Ltd | London | A rating |
| Aircards Ltd | Newcastle Upon Tyne | A rating |
| AIRCOM International Ltd | Surrey | A rating |
| AIRCOM International Ltd | Leatherhead | A rating |
| Aircraft Engineering Services Limited | Stansted | A rating |
| Aircraft Leasing & Management Limited | Crawley | A rating |
| AIRDRIE CARDS AND GIFTS LTD T/A Card Depot | Airdrie | A rating |
| Airdrieonians FC | Airdrie | A rating |
| Airds Hotel | Appin | A rating |
| Aire Ancient Baths London Ltd | London | A rating |
| AIRE FOOD AND WINE LIMITED | South Ockendon | A rating |
| Aire Logic Limited | Leeds | A rating |
| AIRE VALLEY FROZEN FOODS LIMITED | Keighley | A rating |
| Aire Valley Surgery | Leeds | A rating |
| Airedale Catering Equipment Group Limited T/A The Airedale Group | Bradford | A rating |
| Airedale International Air Conditioning Ltd | Leeds | A rating |
| Airedale NHS Foundation Trust | Keighley | A rating |
| Airedale Nursing Home | Bedford | A rating |
| Airedale Voluntary Drug and Alcohol Agency trading as Project 6 | Keighley | A rating |
| Airex Technologies Ltd | London | A rating |
| Airey Miller Surveys Ltd | Sevenoaks | A rating |
| Aireys Wine Store Ltd | Poulton-Le-Fylde | A rating |
| AIRFICIEANT LTD | Essex | A rating |
| Airfield Lighting Systems UK Limited | Wickford | A rating |
| Airfinity Limited | London | A rating |
| Airflow Developments Ltd | High Wycombe | A rating |
| AIRGUARD ENVIROCARE LIMITED | Wolverhampton | A rating |
| Airhive Ltd | London | A rating |
| Airhop Bristol Limited | Bristol | A rating |
| AIRHUB SYSTEMS LTD | London | A rating |
| Airline Cafe (Excel) Limited | London | A rating |
| AIRLINE CONNECT TRANSPORT SERVICES LTD | Solihull, | A rating |
| Airline Tariff Publishing Company (ATPCO) | London | A rating |
| Airline Travels Limited | West Bromwich | A rating |
| AIRLINEN LTD | London | A rating |
| AIRMERGENT LIMITED | Malvern | A rating |
| Airmic Ltd | London | A rating |
| Aironex Ltd | Hampshire | A rating |
| AirOps UK Ltd | London | A rating |
| AirPlus International Limited | London | A rating |
| AIRPLUS TRAVELS LIMITED | Birmingham | A rating |
| Airport and City Chauffeurs Limited | Brentford | A rating |
| Airport Business Centre Limited | Plymouth | A rating |
| Airport Coordination Limited | Staines-upon-Thames | A rating |
| AIRPORT DIRECT TRAVEL LIMITED T/A REZCOMM | DEVON | A rating |
| AIRPORT EXECUTIVE TRANSFER LIMITED | UXBRIDGE | A rating |
| AIRPORT MOVE LIMITED | West Drayton | A rating |
| AIRPORT ONTIME LIMITED | Feltham | A rating |
| AIRPORT PARKING BAY LTD | Markyate | A rating |
| Airport Retail Enterprises (UK) Ltd | London | A rating |
| Airport VIP Services LTD | London | A rating |