| Airportlink Services Limited | Feltham | A rating |
| Airportr Technologies Ltd | London | A rating |
| Airpos Limited | Belfast | A rating |
| Airsource Ltd. | Cambridge | A rating |
| Airspan Communications Limited | Slough | A rating |
| AIRSTARS CONSULTING LIMITED | Beverley | A rating |
| AIRSYS COMMUNICATIONS TECHNOLOGY LIMITED | Romsey | A rating |
| Airtech (Service & Maintenance) Ltd | East Grinstead | A rating |
| Airtel Africa plc | London | A rating |
| AIRTIES GROUP UK LTD | London | A rating |
| AIRTIGHT BUILDING SOLUTIONS LTD | HARROW | A rating |
| Airtily Limited | Edinburgh | A rating |
| Airtime Rewards | MANCHESTER | A rating |
| AIRTRADER LTD | LONDON | A rating |
| Airwair International Ltd | Wollaston | A rating |
| Airwallex (UK) Limited | London | A rating |
| Airwars | London | A rating |
| AIRX TECHNOLOGIES LIMITED | London | A rating |
| Airy Food & Wine | London | A rating |
| AIRY TECH LIMITED | London | A rating |
| AIRZETA CO., LTD | Stanwell | A rating |
| AIS Consulting UK Ltd | London | A rating |
| AIS EXPRESS LIMITED | Bracknell | A rating |
| AIS Traders Ltd | Scotland | A rating |
| Ais Vets Ltd | Chelmsford | A rating |
| AIS Wind Energy Ltd | WIGAN | A rating |
| Aish & Co LTD | Slough | A rating |
| AISH BIRMINGHAM LIMITED | Birmingham | A rating |
| AISH HATORAH UK LIMITED | LONDON | A rating |
| AISHA ADIL LIMITED T/A BITES OF INDIA BOTANIC | BELFAST | A rating |
| Aisha Catering Ltd | Leeds | A rating |
| Aishi Superstore Limited | Hounslow | A rating |
| AISHWARYA LIMITED | Chelmsford | A rating |
| Aisin Europe Manufacturing (UK) Limited | Birmingham | A rating |
| Aisle 8 Limited | London | A rating |
| Aistetic Limited | Oxford | A rating |
| AISUK Ltd | Birkenhead | A rating |
| AISUS Offshore Ltd | Aberdeen | A rating |
| Aisy Ltd | London | A rating |
| AIT Home Delivery (UK) Ltd | Northampton | A rating |
| AIT Solutions Limited | Harrow | A rating |
| AIT TECH LIMITED | London | A rating |
| AIT WORLDWIDE (UK) LOGISTICS LIMITED | SLOUGH | A rating |
| AITCHISON STREET SUPERMARKET LTD T/A KEYSTORE | AIRDRIE | A rating |
| Aival (trading name) | London | A rating |
| Aiveda AC Limited | Street | A rating |
| Aiveda ML Limited | Exmouth | A rating |
| Aiveda SS Limited | Chard | A rating |
| AIVHUB Ltd | Reading | A rating |
| AIVIVO Ltd. | Cambridge | A rating |
| AIWAKEN LTD | London | A rating |
| Aiwon Business Services Ltd | Thatcham | A rating |
| AIX Consultancy Ltd | Cambridge | A rating |
| AIXTRON Limited | Swavesey | A rating |
| Aiyampillai Murugathas T/as Paul News For You | Chesterfield | A rating |
| AIYMA LTD | PETERBOROUGH | A rating |
| AIYUB OMELETTE LTD | LONDON | A rating |
| Aiza jewellers ltd | Birmingham | A rating |
| AJ & BD SERVICES LIMITED | Wednesbury | A rating |
| AJ & Co (Devon) Ltd | Plymouth | A rating |
| AJ & SJ Healthcare Ltd T/A Mitton Dental Surgery | Stourport on Severn | A rating |
| AJ Ahad Limited | Newcastle upon Tyne | A rating |
| AJ Asociatii Limited | Sheffield | A rating |
| AJ Autos UK Ltd | Ilford | A rating |
| AJ Bell Plc | Salford Quays | A rating |
| AJ Boat Canopies Ltd | Daventry | A rating |
| AJ BrickLayer Ltd | London | A rating |
| AJ CAR TRANSPORT LTD | Castlederg | A rating |
| AJ CARE GROUP LTD | STALYBRIDGE | A rating |
| AJ Convenience Store | Gwent | A rating |
| AJ CORPORATION LTD | LONDON | A rating |
| AJ Engineering & Construction Services Limited | Forres | A rating |
| AJ Entertainments Ltd. T/A Murphys Bar & Restaurant | Downpatrick | A rating |
| AJ FAST FOODS LTD | ABERDEEN | A rating |
| AJ FOOD AND WINE STORE LIMITED | STOCKPORT | A rating |
| AJ GOODY'S LTD T/A Goody's Chicken | Nottingham | A rating |
| AJ Grays Inn Limited T/A Elite Peri Peri | London | A rating |
| AJ HOME ASSET MANAGEMENT LTD | Manchester | A rating |
| AJ IMPEX LIMITED | Glasgow | A rating |
| AJ INFOTECH LIMITED | London | A rating |
| AJ INVESTMENTS & TRADING LIMITED | Ilford | A rating |
| AJ MOBILE ZONE LIMITED | Lancashire | A rating |
| AJ Mobility & Training Services Limited | Mitcham | A rating |
| AJ Mobility Limited | Milton Keynes | A rating |
| AJ MULTI SERVICES LTD | London | A rating |
| AJ OFF LICENCE LTD | Glossop | A rating |
| AJ Power Ltd | Craigavon | A rating |
| AJ RESTAURANTS LIMITED | LONDON | A rating |
| AJ Retailers Ltd T/AS First Edition | Norwich | A rating |
| AJ SELLS LTD | London | A rating |
| AJ SERVICE STATION LTD | Grantham | A rating |
| AJ SERVICES & TRADING LIMITED (CRN 12311456) | Ilford | A rating |
| AJ SINGH UK LIMITED | Bognor Regis | A rating |
| AJ SPORTS GLOBAL LIMITED | Stanmore | A rating |
| AJ Stores Ltd | Blackwood | A rating |
| AJ TECH SERVICES LTD | London | A rating |
| AJ TYRES BIRMINGHAM LTD | Birmingham | A rating |
| AJ Watches Limited | London | A rating |
| AJ WORLD FOODS LTD | BUCKINGHAMSHIRE | A rating |
| AJ WRAPS LIMITED | Chelmsford | A rating |
| AJ Zion Limited | Bournemouth | A rating |
| AJ'S CONVENIENCE STORE LTD | WIGAN | A rating |
| AJ's Stores Ltd | Sunderland | A rating |
| AJ19 Limited | Dartford | A rating |
| AJA Architects LLP | Coventry | A rating |
| AJA SERVICE STATION LTD T/A TEXACO | Worcestershire | A rating |
| Ajab Gajab Cafe Limited T/A Ajab Gajab Cafe | Liverpool | A rating |
| Ajax Minerva Limited | Bradford | A rating |
| AJAY KRUPA LIMITED t/a Mayfair Hotel | Shanklin | A rating |
| AJB INTERNATIONAL LTD | LONDON | A rating |
| AJD Contractors Limited | Romford | A rating |
| AJDK Foods Limited T/a Cakeworld | LONDON | A rating |
| AJE INFRASTRUCTURE SERVICES LIMITED | LONDON | A rating |
| AJI (RESTAURANTS) LIMITED | LONDON | A rating |
| Ajiban Raj Jayenthiran T/A Anna Local Express - Go Local | Chesterfield | A rating |
| Ajido Ltd TA Dominion Pharmacy | Sunderland | A rating |
| Ajiil Human Capital Ltd | Maeshafn | A rating |
| AJIKUMAR THERUVILPARAMBIL BHAKTHAVALSALAN T/A AJITH SALOON | London | A rating |
| Ajimi Ltd trading as Okome Clarkston | Glasgow | A rating |
| Ajinx Studios Limited | Scotlandwell | A rating |
| Ajiv UK Limited | London | A rating |
| AJK BUILDERS & RENOVATORS LTD | Luton | A rating |
| AJK COACHES LIMITED | Ilford | A rating |
| AJK GARMENTS LTD | WALSALL | A rating |
| AJK Telecoms Limited | Ilford | A rating |
| AJL Medical Limited | London | A rating |
| AJM COURIER SERVICES LTD | Southall | A rating |
| AJM Management Ltd | Ashford | A rating |
| Ajmeer Spice Tandoori | Liverpool | A rating |
| AJMI FOODS UK LTD | Leicester | A rating |
| AJMS Consultants | Leeds | A rating |
| Ajouve Limited | London | A rating |
| AJP MATOS PINHEIRO LTD | London | A rating |
| AJPHARM LTD | Thornton Heath | A rating |
| AJQ ACCOUNTANTS LIMITED | London | A rating |
| AJS Asset Care Ltd. | Spalding | A rating |
| AJS ATWAL SUPERMARKET LIMITED | London | A rating |
| AJS Foods Ltd t/a Kinara | GLASGOW | A rating |
| AJS SUPERSTORE (NPT) LTD | NEWPORT | A rating |
| AJSL Construction Limited | Milton Keynes | A rating |
| AJT Prestige Ltd t/a Radfield Home Care Chippenham & North Wiltshire | Chippenham | A rating |
| AJV PROPERTY SERVICES (UK) LTD | Slough | A rating |
| Ajwa Jewellers Limited | Southall | A rating |
| Ajwa Sweets Ltd | Ilford | A rating |
| AK Property Agents Ltd | London | A rating |
| AK & CO CONSULTANTS LTD | London | A rating |
| AK & CO Properties Ltd. T/As Park Store | Tonypandy | A rating |
| AK & DM Morrison Ltd | Isle of Lewis | A rating |
| AK & HA FOOD TRADERS T/A FIRST CHOICE LTD | Bury | A rating |
| AK & HH Ltd | Oldham | A rating |
| AK & TA Radcliffe Limited | Milton Keynes | A rating |
| AK Automotive | Rowlands Gill | A rating |
| AK Autos Ltd | Birmingham | A rating |
| AK Blades and Fades Limited | Keighley | A rating |
| AK BUILDERS HEATING & PLUMBING LIMITED | Birmingham | A rating |
| AK Builders Merchants Limited | Hayes | A rating |
| AK Camden Gift Shop Ltd | London | A rating |
| AK Celestial UK Ltd | Bolton | A rating |
| AK Charcoal Ltd | Newcastle Upon Tyne | A rating |
| AK CHAUFFEUR SERVICE LTD | Hayes | A rating |
| AK Construction Services Ltd | Stoke on Trent | A rating |
| AK DEVELOPMENT PROJECTS LTD | High Wycombe | A rating |
| Ak Earls Takeaway Ltd T/A CheatMeals | London | A rating |
| AK Eco Energy Ltd | Birmingham | A rating |
| AK Events & Media Ltd | Northampton | A rating |
| AK Events Ltd | Coventry | A rating |
| AK FOOD & DRINKS LTD. T/As SPAR | Swansea | A rating |
| AK FRAMES LTD | Dunfermline | A rating |
| AK FRESH FISH & SEA FOOD LIMITED | London, England | A rating |
| AK Fuel Limited | Rochdale | A rating |
| AK GOLDSMITH & SONS UK LIMITED | London | A rating |
| AK GRILLERS LIMITED | Halesowen | A rating |
| AK GROCERIES & HALAL MEAT LTD | BIRMINGHAM | A rating |
| AK Grocers Ltd | Bolton | A rating |
| AK HAIRSTYLES LTD | London | A rating |
| AK HOT PIZZA 4 U LTD | London | A rating |
| AK IMMIGRATION SERVICES LTD | Manchester | A rating |
| AK Infrasoft LTD | Slough | A rating |
| AK INNOVATIVE DESIGN SOLUTION LTD | Derby | A rating |
| AK Jensen Limited | London | A rating |
| AK KEBAB HOUSE LIMITED | Birmingham | A rating |
| AK LINCOLN LTD | Caistor | A rating |
| AK Metalworks Limited | Croydon | A rating |
| AK Motors Bolton Ltd | Halifax | A rating |
| AK Olive Garden Ltd | London | A rating |
| AK PARCEL SERVICES LTD | ILFORD | A rating |
| AK Pharma Ltd | willand | A rating |
| AK PHONES & ACCESSORIES LTD | Southall | A rating |
| AK Premuim Events | Luton | A rating |
| AK PROMISE LTD | NORFOLK | A rating |
| AK RETAIL LTD | Reading | A rating |
| AK RETAILERS LTD | Luton | A rating |
| AK Secured Solutions Ltd | Birmingham | A rating |
| AK Shopfronts Limited | Ilford | A rating |
| AK SOUTH YORKSHIRE LIMITED | Edgware | A rating |
| AK Traders 2019 LTD | Manchester | A rating |
| AK VEHICLE RENTAL LIMITED | Paisley | A rating |
| AK Well Services Limited | Aberdeen | A rating |
| AK Windows & Doors Ltd | Wolverhampton | A rating |
| AK WINDOWS SOUTH LTD | LUTON | A rating |