| Autocraft Machining Solutions | Wellingborough | A rating |
| Autodesk Ltd | Birmingham | A rating |
| Autodiscovery | Wantage | A rating |
| Autodoc Operations UK Limited | London | A rating |
| Autoenterprises ltd | BASILDON | A rating |
| Autoever Limited | Oldham, England | A rating |
| AUTOFIX BOLTON LIMITED | Bolton | A rating |
| Autoflame Engineering Limited | Kent | A rating |
| AutoFlow Limited | Chelford | A rating |
| Autofusion Ltd | Glasgow | A rating |
| AutogenAI Ltd | London | A rating |
| Autoguard Warranties Ltd | Camberley | A rating |
| AUTOLINK EXPERTS LTD | LEICESTER | A rating |
| Autolink Rentals Ltd | London | A rating |
| Autolink Service Centre Limited | Wolverhampton | A rating |
| Autolomous Ltd | London | A rating |
| Autolus Ltd | London | A rating |
| AUTOMANIA BIRMINGHAM LTD | West Bromwich | A rating |
| AUTOMANIA MOT LTD | Manchester | A rating |
| AUTOMASTER REPAIR CENTRE LTD | Oldham | A rating |
| Automata Technologies Limited | London | A rating |
| Automated Building & Energy Controls Ltd. | Tewkesbury | A rating |
| Automated Business Systems Limited (ABS Ltd) | Wendover | A rating |
| Automated Engineering Services (UK) Limited | London | A rating |
| Automated Wire Bending Limited | Peterborough | A rating |
| Automatic Data Processing (ADP) Limited | Staines Upon Thames | A rating |
| AUTOMATIC MOTORS LTD | London, | A rating |
| Automatic Welding Systems Ltd. | Hawthorn | A rating |
| Automatik (UK) Limited | LONDON | A rating |
| Automation Anywhere UK Limited | London | A rating |
| AUTOMATION CONSULTANTS LTD | Theale | A rating |
| Automation Controls Limited | Longbridge | A rating |
| Automation Holdco Limited | Farnborough | A rating |
| Automation Logic Limited | London | A rating |
| AUTOMATION ONE LTD | Brighton | A rating |
| Automeds Pharmacy Ltd | POOLE | A rating |
| AUTOMIZEON TECH LTD | WEMBLEY | A rating |
| Automotia Limited | Nottingham | A rating |
| Automotion Accident Repair Centre | Coventry | A rating |
| Automotive Business Intelligence Ltd | London | A rating |
| AUTOMOTIVE CORPORATION LIMITED | Hayes | A rating |
| Automotive Group Ltd. | Newcastle upon Tyne | A rating |
| AUTOMOTIVE REGENERATIONS LTD | Oldbury | A rating |
| Automus Consulting UK Limited | London | A rating |
| Autonative Ltd | Exeter | A rating |
| AUTONE TRADING LIMITED | London | A rating |
| Autoneum Great Britain Limited | Stoke on Trent | A rating |
| AutoNeura Ltd | LEAMINGTON SPA | A rating |
| AUTONOMOUS ENTERPRISES LIMITED | Leicester | A rating |
| Autonomous International Limited | London | A rating |
| Autonomous Manufacturing Ltd | London | A rating |
| Autonomous UK Operations Limited | London | A rating |
| Autonomy Capital Research LLP | London | A rating |
| Autonomy Care Group Limited | Melksham | A rating |
| Autonomy Service Company Limited | London | A rating |
| Autopack Ltd | Hereford | A rating |
| AUTOPART CENTRE LTD | ENNISKILLEN | A rating |
| Autopartz Distribution Limited | High Wycombe | A rating |
| Autopickr Ltd | Cambridge | A rating |
| AutoProtect (MBI) Limited | Essex | A rating |
| AUTORAMA (PETERBOROUGH) LIMITED Company number 11241668 | Peterborough | A rating |
| Autorola Ltd | Macclesfield | A rating |
| Autoscribe Limited | Stone | A rating |
| Autosmart International Ltd | Lichfield | A rating |
| Autosolutions Runcorn Ltd | Manchester | A rating |
| Autosport Media UK Ltd | Isleworth | A rating |
| Autotech Cars Ltd. | Nottingham | A rating |
| Autotech Centre Garage Ltd | Chesham | A rating |
| Autotrader Limited | Manchester | A rating |
| Autotrust Ltd | Rainham | A rating |
| Autovia Limited | London | A rating |
| Autovision Luton Limited | Luton | A rating |
| Autovista Limited | London | A rating |
| Autowave Limited | Nottingham | A rating |
| Autowax Ltd | Surrey | A rating |
| Autoweb.co.uk Limited | Selby | A rating |
| AUTOWIZE EDMONTON LTD | London | A rating |
| AUTOZONE | BRADFORD | A rating |
| AUTOZONE MANCHESTER LIMITED | Manchester | A rating |
| AUTOZONE SPECIAL VEHICLES SUPPLY UK LTD | London | A rating |
| Autumn Lodge Hove Ltd | Hove | A rating |
| Autumnpaper Limited | London | A rating |
| Aux IT Solutions | Bournemouth | A rating |
| Aux Merveilleux City Ltd | London | A rating |
| Aux Merveilleux de Fred Ltd | London | A rating |
| Auxilio Care Limited | Birmingham | A rating |
| Auxilio Services Limited | London | A rating |
| Auxilium Housing Association | BLACKBURN | A rating |
| AUXILIUM SERVICES LTD | Dukinfield | A rating |
| AUXILLIUM HOUSING GROUP LIMITED | London | A rating |
| Auxpier Limited | Sauchie Alloa | A rating |
| AUZ Traders Ltd | Glasgow | A rating |
| AV (BEES) LIMITED | HACKNEY, LONDON | A rating |
| AV & JI STORES LTD | Sowerby Bridge | A rating |
| AV BEAUTY LOUNGE LTD | Wembley | A rating |
| AV BLUE LTD | Southall | A rating |
| AV CORPORATION LTD | Leicester | A rating |
| AV ELECTRICS LIMITED | Wolverhampton | A rating |
| AV Food and Wine | Kent | A rating |
| AV FRUIT AND VEG LTD T/A A V Food and Wine | Hampshire | A rating |
| AV Haulage Ltd | Iver | A rating |
| AV INTERNATIONAL LIMITED | Manchester | A rating |
| AV Megaline Ltd | Kingswinford | A rating |
| AV Metals Limited | Bolton | A rating |
| AV OLD COMPTON STREET LTD T/A All'Antico Vinaio | London | A rating |
| AV RETAILS LTD T/A PREMIER | Maidenhead | A rating |
| AV Support 247 Limited | Leeds | A rating |
| AV Supra Ltd T/A Tapri Junction | Harrow | A rating |
| AV traders Ltd t/a Texaco Laleston Service Station | Laleston | A rating |
| AVA CARE SERVICES LTD | Northampton | A rating |
| AVA CONSTRUCTIONS & DECORS LTD | Hayes | A rating |
| Ava Security Limited | Uxbridge | A rating |
| AVA Softech Ltd T/A Aqalax Renewable Energy Solutions | Sheffield | A rating |
| AVA TYRES LIMITED | Dagenham | A rating |
| Avaaz | London | A rating |
| Avacone Ltd | London | A rating |
| Avacta Group plc | Wetherby | A rating |
| Avadh Limited T/A Sundorne Store | Shropshire | A rating |
| Avadh Limited T/A Sundorne Store & Premier | Shropshire | A rating |
| Avadh Retail Limited T/A Border Off Licence | Shrewsbury | A rating |
| Avado Learning Limited | London | A rating |
| AVAKINO LIMITED | Manchester | A rating |
| Aval Consulting Group Ltd | London | A rating |
| AVALAKE LIMITED | Ipswich | A rating |
| Avalara Europe Limited | Brighton | A rating |
| Avalara Europe Ltd | BRIGHTON | A rating |
| AVALERE HEALTH GLOBAL LIMITED | London | A rating |
| Avalon Capital Markets Limited | London | A rating |
| AVALON CARE TRAINING LTD. | Manchester | A rating |
| Avalon Entertainment Limited | London | A rating |
| Avalon Group | Harrogate | A rating |
| Avalon Guest House - Hyde Park Guest House | Leeds | A rating |
| Avalon Veterinary Clinic Ltd | Milngavie | A rating |
| Avaloq UK Limited | London | A rating |
| Avame Limited | Ilford | A rating |
| Avan Engineering Services LTD | Bushey | A rating |
| Avan Ltd T/A Brightside Manor | Cardiff | A rating |
| Avana Healthcare Limited | Kent | A rating |
| Avanade UK Limited | LONDON | A rating |
| Avance Consulting (Europe) Limited | London | A rating |
| Avani Solutions Limited | RIDDLESWORTH | A rating |
| AVANOSS LIMITED | Lydney | A rating |
| Avans Associates | Manchester | A rating |
| Avansas Office Supplies Limited | London | A rating |
| Avant Arte Ltd | London | A rating |
| Avant Consult LTD | Huddersfield | A rating |
| AVANT DATA LTD | Toton | A rating |
| AVANT GARDE NEW ELTHAM LTD | London | A rating |
| Avant Healthcare Services Ltd | Hounslow | A rating |
| Avant Restaurants Ltd | Inglewhite, Preston | A rating |
| AVANT TECNO (UK) LTD | Bridgham, Norwich | A rating |
| AVANT-GARDE SERVICES LIMITED | LONDON | A rating |
| Avanta Holdings Ltd | LEEDS | A rating |
| Avante Care and Support Limited | Faversham | A rating |
| AVANTE IT (UK) LIMITED | LONDON | A rating |
| Avante Pharm LTD | Edinburgh | A rating |
| Avantgarde Finance Ltd | London | A rating |
| Avantgarde Marketing Limited | London | A rating |
| Avanti Care Services | ST ALBANS | A rating |
| Avanti Conveyors | Furness Vale | A rating |
| Avanti Destinations UK Limited | Manchester | A rating |
| Avanti Fostering | Stanmore | A rating |
| Avanti Foundation Limited | Lincoln | A rating |
| AVANTI GAS LIMITED | CHESTERFIELD | A rating |
| Avanti Global Limited | London | A rating |
| Avanti Homecare Limited | West Bridgford | A rating |
| AVANTI HYLAS 2 LIMITED | London | A rating |
| Avanti Schools Trust | Stanmore | A rating |
| Avantia Insurance Limited | New Malden | A rating |
| Avantia Law Limited | London | A rating |
| Avantis Hardware Limited | Rugeley | A rating |
| Avantis Hotels Limited | Northwood | A rating |
| Avantis Marine Limited | Cardiff | A rating |
| Avanton Limited | London | A rating |
| Avardi Partners LTD | London | A rating |
| Avartek Ltd | Bradford | A rating |
| Avartis Limited | Hemel Hempstead | A rating |
| AVASANT LIMITED | STOCKPORT | A rating |
| AVASK Global Compliance Ltd. | Richmond | A rating |
| AVASO Technology Solutions Ltd | London | A rating |
| Avatar Dining Limited | Market Harborough | A rating |
| Avatar Dining Ltd | Market Harborough | A rating |
| Avatar Group Limited T/A Avatar | Shropshire | A rating |
| AVATAR LUTTERWORTH LIMITED | Lutterworth | A rating |
| Avatar Recruitment Consultancy Limited | Bracknell | A rating |
| Avatar SWH Limited T/a Selly Wood House Nursing Home | Birmingham | A rating |
| Avatar Tech Limited | Illford | A rating |
| AVAXZIPEN LIMITED | Abingdon | A rating |
| Avaya UK | London | A rating |
| Avaza Services LTD | London | A rating |
| Avb Enterprises Ltd T/As Hamylton Childrens Homes | Leicester | A rating |
| AVC TECH LIMITED | Luton | A rating |
| AVC Tech Services | Letchworth Garden City | A rating |
| AVCAS | Shrewsbury | A rating |
| Avdv Ltd t/a Clyx App | London | A rating |
| AVE UK Ltd | Farnham | A rating |
| Avebury Cricket Club | Avebury | A rating |
| Avec Support Ltd | Walsall | A rating |
| Avecto Limited | Manchester | A rating |
| Avegen Ltd | Rickmansworth | A rating |