| Aveley Convenience Wine Store | South Okendon | A rating |
| Aveley Post Office | South Okendon | A rating |
| Avellinia Capital Ltd | London | A rating |
| Avellino Care Ltd | Cannock | A rating |
| Avena Healthcare Ltd | Largs | A rating |
| AVENCERA LTD | RINGWOOD | A rating |
| Aveni Ltd | Edinburgh | A rating |
| Avenir Group Limited | Milton Keynes | A rating |
| Avenir LNG M.S. Limited | London | A rating |
| AVENIR RESEARCH LIMITED | London | A rating |
| Avens Care Homes Ltd | Tavistock | A rating |
| Avensis Support Limited | Bradford | A rating |
| Avensure Limited | Manchester | A rating |
| Avensys UK Ltd | Kidderminster | A rating |
| aventis pharma Ltd t/a Sanofi | Reading | A rating |
| AVENTRA SYSTEMS LTD | MILTON KEYNES | A rating |
| Aventum Group Management Services Limited | London | A rating |
| Aventus Network Services Limited | East Grinstead | A rating |
| Avenue Europe Management LLP | London | A rating |
| Avenue Impact Limited | Derby | A rating |
| AVENUE PROPERTY CONSTRUCTION LIMITED | London | A rating |
| Avenue Spice Limited | Portsmouth | A rating |
| AVENUEBIO CONSULTING LIMITED | Farnham | A rating |
| Avenues Group | Sidcup | A rating |
| AVENUES HEALTHCARE LTD | Burnley | A rating |
| AVEO Group | London | A rating |
| AvePoint UK Ltd. | London | A rating |
| AVER LOGISTICS LTD | RICKMANSWORTH | A rating |
| Averge Technologies UK Limited | Thetford | A rating |
| AVERLEY QWARA HEALTHCARE LTD | Sheerness, | A rating |
| Averroes Capital Limited | London | A rating |
| Avery Dennison Materials UK Limited | Cramlington | A rating |
| AVERY DENNISON RETAIL INFORMATION SERVICES UK LIMITED | Nottingham | A rating |
| AVES HOUSING | Thornton Heath | A rating |
| Avetta Limited | Maidenhead | A rating |
| AVEVA Solutions Ltd | Cambridge | A rating |
| AVFD Limited | London | A rating |
| AVG DRYLINING LTD | Purley | A rating |
| AVG STORES LTD | SOUTHAMPTON | A rating |
| AVG Trade Limited T/a Pinnova | Pinner | A rating |
| Avi Consulting London Limited | Hounslow | A rating |
| Avi Courier Express Limited | Birmingham | A rating |
| AVI KINDS LTD T/A ALLSORT NEWS FOOD AND WINE PREMIER | GREATER LONDON | A rating |
| AVI-SPL Limited | Farnborough | A rating |
| Avi's Food and Wine Ltd | Coventry | A rating |
| Avia Cargo Services Limited | London | A rating |
| Avia Technique Limited | Wokingham | A rating |
| Aviadobio Limited | London | A rating |
| AVIAGEN LIMITED | NEWBRIDGE | A rating |
| Avian Labs Limited | London | A rating |
| Avian Mobile Limited | Wallington | A rating |
| AVIAREPS UK Ltd | London | A rating |
| Aviasenze Limited | London | A rating |
| AVIAT NETWORKS UK LIMITED | LONDON | A rating |
| AviatePro Services LTD | London | A rating |
| Aviation and Defence Spares Ltd | Poole | A rating |
| Aviation Crew Services Limited | Longford | A rating |
| Aviation Innovations Limited | Fareham | A rating |
| AVIATION NEWS LTD | Stoke-On-Trent, | A rating |
| AVIATION PERSONNEL LTD | Uxbridge | A rating |
| Aviation Works Ltd | London | A rating |
| Aviator Hotel | Farnborough | A rating |
| AVIATOR75 LTD | Manchester | A rating |
| Aviatrix Systems UK Ltd | London | A rating |
| AVIC CABIN SYSTEMS UK LIMITED | Christchurch | A rating |
| Avic International Holding Corporation | London | A rating |
| Avican Support Ltd | Newmarket | A rating |
| AVICENATECH UK LTD | Edinburgh | A rating |
| Avicenna (Clinical Centre of Chinese Medicine) | Hove | A rating |
| Avicenna Care Limited | Kirkcaldy | A rating |
| Avicenna Retail Limited | South Croydon | A rating |
| Avicenna Sanatio LLP | Nottingham | A rating |
| AVICII LIMITED | Denbigh | A rating |
| Avida LTD trading as Avida Supported Living | COLESHILL | A rating |
| Avidcrave Ltd | Braintree | A rating |
| Avidety Limited | London | A rating |
| Avidity Group Ltd | Glasgow | A rating |
| Avidity Living Limited | Staines upon Thames | A rating |
| AVIDITY SCIENCE LIMITED | Aylesbury | A rating |
| Aviela Care Ltd | ORPINGTON | A rating |
| AVIEMORE CONVENIENCE STORE | AVIEMORE | A rating |
| Avient Material Solutions UK Limited | Knowsley | A rating |
| Avifauna Technology Limited | Wilmslow | A rating |
| AVIGHNA ISH LTD | London | A rating |
| Avigna Solutions Limited | Milton Keynes | A rating |
| Avigna Technology Solutions Limited | London | A rating |
| Avilah Foods Limited | Reading | A rating |
| Avin Accountants Ltd | Watford | A rating |
| AVINASH UK LIMITED | KINGSTON UPON THAMES | A rating |
| AVINEET CONVENIENT LTD | London | A rating |
| AVINEON EUROPE LIMITED | LONDON | A rating |
| AVINMIN LTD T/A WEST END FOOD STORE | Lincoln | A rating |
| AvInSys Limited | Kingston Upon Thames | A rating |
| Avione Saving & Investment Ltd | Canterbury | A rating |
| Avior Capital Markets International Limited | London | A rating |
| Aviotti&Gobbato LTD | Chester | A rating |
| Avire Trading Ltd | Maidenhead | A rating |
| Avis Budget Services Limited | Bracknell | A rating |
| AVIS HOTEL LIMITED | Bromley | A rating |
| Avisant Consulting Limited | Cardiff | A rating |
| AVISEENA INTERNATIONAL HEALTHCARE LTD | Banstead | A rating |
| Aviserv limited | Hayes | A rating |
| Aviskaar Enterprises Ltd | READING | A rating |
| Avison Young (UK) Limited | Birmingham | A rating |
| Avista Law Ltd | Morden | A rating |
| Avitah Capital LLP | London | A rating |
| Avitech Investments Limited | Chigwell | A rating |
| Aviteus Healthcare Ltd | Kenton | A rating |
| AVITICAL LTD T/A BRETTS PHARMACY | GROVE | A rating |
| Aviura Limited | London | A rating |
| AVIVA DENTISTRY LIMITED | ST ALBANS | A rating |
| Aviva plc | London | A rating |
| Avivets Veterinary Services Ltd | Pickmere | A rating |
| Aviyal Ltd T/A Sri Rathiga | London | A rating |
| AVK Foods Private Limited T/A Nelson Pub | Warwick | A rating |
| AVK Innovations Ltd | Reading | A rating |
| AVK LAW | Ilford | A rating |
| AVK Power Services Limited | Lenham | A rating |
| AVK UK LTD | Northampton | A rating |
| AVK-SEG LTD | Maidenhead | A rating |
| Avkalan Ltd | Bexleyheath | A rating |
| AVKnight Investments UK LTD | London | A rating |
| AVL ENTERPRISES LIMITED | Ilford | A rating |
| AVL Powertrain UK Ltd | Basildon | A rating |
| AVL United Kingdom Limited | Kidderminster | A rating |
| AVM FISH N CHIPS LTD | Middlesbrough | A rating |
| AVM HEALTH CARE LTD | WATERLOOVILLE | A rating |
| AVM Solutions (UK) Ltd | Bolton | A rating |
| AVMI Kinly Ltd | Sunbury on Thames | A rating |
| AVN MEDICAL LIMITED | Penrith | A rating |
| AVNEE HARBOUR STORE LTD | PAIGNTON | A rating |
| Avnet EMG Limited | Maidenhead | A rating |
| Avni Limited | London | A rating |
| Avni Saini Ltd | Leicester | A rating |
| Avni Sub Ltd T/A Subway | Eastleigh | A rating |
| Avnikh Ltd T/A Owl & Pussycat | Leicester | A rating |
| Avocado Labs Limited | Lincolnshire | A rating |
| Avocet Trust | Hull | A rating |
| Avoira Limited | Bury | A rating |
| Avoko Group Holdings LTD | Bedford | A rating |
| Avolites Ltd. | London | A rating |
| Avolution UK | London | A rating |
| Avon and Wiltshire Mental Health NHS Partnership | Bath | A rating |
| Avon Beach Ltd. | Christchurch | A rating |
| Avon Care Homes Limited | Wells | A rating |
| Avon Cosmetics Limited | Northampton | A rating |
| Avon Data Systems Limited | Bristol | A rating |
| Avon Education Services Ltd | Bristol | A rating |
| AVON FOODS LIMITED | Egham | A rating |
| Avon Healthcare Solutions Ltd | BRISTOL | A rating |
| Avon Home Carers Ltd | Bristol | A rating |
| Avon Homecare Ltd - T/A Clarity Homecare Bristol | Bristol | A rating |
| Avon House (Balcombe) Ltd | Balcombe | A rating |
| Avon Lee Lodge | Burton | A rating |
| Avon Lodge UK Limited | London | A rating |
| Avon Magnetics Limited | Christchurch | A rating |
| Avon Metals Ltd | Gloucester | A rating |
| Avon Network Events | Bristol | A rating |
| Avon Polymer Products Limited | Melksham | A rating |
| AVON RACING LTD | Warwickshire | A rating |
| Avon Support | Stratford Upon Avon | A rating |
| AVON SURVEY LTD | Bristol | A rating |
| Avon-Dynamic Calibration Limited | Bristol | A rating |
| Avonbloom Ltd | Blackpool | A rating |
| Avondale Care (Scotland), Limited | Falkirk | A rating |
| Avondale Care Home | Motherwell | A rating |
| Avondale Care Home Limited | Leigh-on-Sea | A rating |
| Avondale Dental | Grange Over Sands | A rating |
| Avondalecare (Kent) Ltd | Kent | A rating |
| Avonfinch Ltd | Market Drayton | A rating |
| AVONSIDE PHT TEWKESBURY LTD | Tewkesbury | A rating |
| AVONSNEWS UK LTD T/A Premier | BRISTOL | A rating |
| Avonvale Distributions Ltd | Slough | A rating |
| Avoptics Limited | Yeovil | A rating |
| Avos Technology Ltd | Cambridge | A rating |
| Avotech Trading Limited | Harrow | A rating |
| Avove Ltd | Chorley | A rating |
| Avoy Technologies Limited /ta SnapSea | London | A rating |
| AVP LOGISTICS LTD | SOUTHAMPTON | A rating |
| AVR K2U SANDHU'S LIMITED | Leighton Buzzard | A rating |
| AVR London | London | A rating |
| AVR Technology Services Ltd | Welling | A rating |
| AVRA Greek Cuisine Ltd | Sutton | A rating |
| AVRAM FINANCIAL SERVICES LIMITED | Solihull | A rating |
| Avre Partnership Ltd | Essex | A rating |
| AVRELLA FISHING COMPANY LTD | LERWICK | A rating |
| AVRILLO R&D | London | A rating |
| Avrin Pharma Ltd | Liverpool | A rating |
| AvroKO UK Ltd | London | A rating |
| AVRON TRADING LIMITED | BERKSHIRE | A rating |
| Avrora Restaurants Limited | London | A rating |
| Avruka Limited | Harrow | A rating |
| AVS (TVM) LTD | Leeds | A rating |
| AVS ADDED VALUE SOLUTIONS UK LTD | Oxford | A rating |
| AVS CONTRACTORS LTD. | Hounslow | A rating |
| Avs Info Systems Limited | Reading | A rating |
| AVS News LTD | WREXHAM | A rating |
| AVS SUPERSTORE LTD | SHEFFIELD | A rating |
| Avsar Enterprises Limited | North Wembley | A rating |
| Avsar Traders Ltd | London | A rating |