| AC Furniture Ltd | Birmingham | A rating |
| AC Gilead Solicitors | London | A rating |
| AC Jade Trading Ltd | Surrey | A rating |
| AC Maben Ltd T/A Kevins Schoolwear | Greenford | A rating |
| AC Projects/ Alternative Currents Ltd | Stirling | A rating |
| AC Security Solutions Ltd | Chessington North | A rating |
| AC Solarscapes UK Ltd | Walthamstow, London | A rating |
| AC Talent Sport & Entertainment UK Limited | London | A rating |
| AC Translations Limited | Crowborough | A rating |
| AC White Solicitors LLP | Ayr | A rating |
| AC Whitehaven Ltd | Norfolk | A rating |
| AC&CA LTD | Melksham | A rating |
| ACA Compliance (Europe) Limited | London | A rating |
| Aca Studios Ltd | London | A rating |
| ACA Systems Support limited | Sunderland | A rating |
| ACAASA LTD | Belfast | A rating |
| Acacia Care | London | A rating |
| Acacia Care and Education Limited | Oxford | A rating |
| ACACIA COMMUNITY CARE LIMITED | London | A rating |
| Acacia Consultants and Associates Ltd | Northampton | A rating |
| ACACIA CREATIVE STUDIO LTD | Doncaster | A rating |
| Acacia Homecare Ltd | Staines-upon-Thames | A rating |
| Acacia Lodge Care Home Limited | Billericay | A rating |
| Acacia Number 1 Ltd T/A Acacia House | Tenterden | A rating |
| Acacia Systems Pty Ltd | Putney | A rating |
| Acacia Traders LTD | Bristol | A rating |
| Academia Limited | Hemel Hempstead | A rating |
| Academia One Limited | London | A rating |
| Academia Park Ltd | London | A rating |
| ACADEMIC ACHIEVER LIMITED | London | A rating |
| ACADEMIC PLACEMENT SERVICES LTD | LONDON | A rating |
| Academic Research House UK Limited | London | A rating |
| Academically Ltd | Newcastle Upon Tyne | A rating |
| ACADEMICIANS LTD | Wednesbury | A rating |
| ACADEMY BUILDING WORKS LTD | Hounslow, | A rating |
| Academy Care Ltd | Wakefield | A rating |
| Academy Dental Care Ltd | Aberdeen | A rating |
| Academy Films Ltd | LONDON | A rating |
| Academy Geomatics Ltd | Gateshead | A rating |
| ACADEMY HOSPITALITY LTD | London | A rating |
| ACADEMY HOUSE LIMITED | GLASGOW | A rating |
| Academy Medical Centre | Forfar | A rating |
| Academy Music Group | London | A rating |
| Academy of Live Technology Ltd | South Kirkby | A rating |
| Academy of Medical Royal Colleges | London | A rating |
| Academy of Motion Picture Arts and Sciences | London | A rating |
| Academy of Robotics Ltd | Cardff | A rating |
| Academy Of Sinology UK | Swansea | A rating |
| Academy of the Annunciation | Buckfastleigh | A rating |
| Academy Restaurants LTD | Inverness | A rating |
| Academy Transformation Trust | Sutton Coldfield | A rating |
| ACADEMY WHOLESALE ELECTRICS LTD | GLASGOW | A rating |
| Acadian Asset Management (UK) Limited | London | A rating |
| Acal BFi UK Limited | Wokingham | A rating |
| ACAMS (UK) Ltd | London | A rating |
| ACANA CARE LTD T/A ACANA SUPPLIES | London | A rating |
| Acap Advisory Ltd | London | A rating |
| Acar Supermarket Limited | London | A rating |
| Acara Management Limited | Richmond-upon-Thames | A rating |
| ACARLAR LIMITED | New Milton | A rating |
| Acast Stories Limited | London | A rating |
| Acasta Europe Limited | Cheadle | A rating |
| Acasta Partners UK LLP | London | A rating |
| Acaster Lloyd Consulting Ltd | LONDON | A rating |
| ACC Aviation Limited | Weybridge | A rating |
| ACC GARAGE SERVICES LTD | Beckenham | A rating |
| ACC POLSKI SUPERMARKET LIMITED | KILBURN | A rating |
| Acc-Sel Genetics Limited | North Road | A rating |
| ACCA FOODS LIMITED | Hitchin | A rating |
| ACCA LIMITED | Hitchin | A rating |
| Accede Support Limited | Barnsley | A rating |
| Accedo UK Limited | London | A rating |
| Accel Partners Management LLP | London | A rating |
| ACCEL SOFTWARE SERVICES LIMITED | GREATER MANCHESTER | A rating |
| Accelar Limited | Fleet | A rating |
| Accelerate Group Limited t/a Webtrends Optimize | Egham | A rating |
| Accelerate Health CIC | London | A rating |
| Accelerate NewCo Limited | Newcastle under Lyme | A rating |
| Accelerate NewCo Limited | Newcastle- under - Lyme | A rating |
| Accelerate Ventures | London | A rating |
| Accelerator Advisory Limited | Cambridge | A rating |
| Accelerator Limited | Whiteley | A rating |
| Accelercomm Limited | Southampton | A rating |
| ACCELERO LOGISTICS LTD | Wolverhampton | A rating |
| ACCELLENCY LIMITED | LONDON | A rating |
| Accelleron UK Ltd | Telford | A rating |
| Accely Ltd | Glasgow | A rating |
| Accelya Global Limited | Windsor | A rating |
| Accencis ConSulting LTD | Loudwater | A rating |
| Accendo Supplies Ltd | London | A rating |
| Accent Catering Services Limited | Staines-Upon-Thames | A rating |
| ACCENT International Consortium for Academic Programs Abroad, Ltd. | London | A rating |
| Accent Marketing and Research Limited | London | A rating |
| Accent Services (Air Conditioning) Limited | Shepperton | A rating |
| Accent Wire Limited | Solihull | A rating |
| Accentor IT Solutions Limited | Chelmsford | A rating |
| Accentra Technologies Ltd | London | A rating |
| ACCENTRIC FREIGHTS LTD | Glasgow | A rating |
| Accenture (UK) Limited | London | A rating |
| Accenture Song Brand UK Limited | London | A rating |
| Accept & Proceed | London | A rating |
| Accertify (UK) Limited | London | A rating |
| ACCESS 24/7 HEALTHCARE LIMITED | GRAYS | A rating |
| Access All Areas | Shrewsbury | A rating |
| Access All Areas | London | A rating |
| Access All Care and Training Solutions Ltd | Chingford | A rating |
| ACCESS AND INFORM LIMITED T/A WOODSIDE POST AND CONVENIENCE STORE | aberdeen | A rating |
| Access Associates Ltd | Cheltenham | A rating |
| Access Building Contractors Ltd. | London | A rating |
| Access Capital Partners (UK) Ltd. | London | A rating |
| Access Care Solutions Limited | Derby | A rating |
| ACCESS CARS LTD | LONDON | A rating |
| Access Citizens Services UK Limited | London | A rating |
| Access Construct Ltd | London | A rating |
| Access Construction Services Ltd | London | A rating |
| Access Dignity Care Limited | Walton on the Naze | A rating |
| Access Equity Management Limited | London | A rating |
| Access Fintech (UK) Limited | London | A rating |
| Access Group Ltd | Erith | A rating |
| Access Industries (UK) Limited | London | A rating |
| Access Infinity Ltd | London | A rating |
| Access Insulation & Coatings | Middlesbrough | A rating |
| Access International Security Ltd | Loughton | A rating |
| Access LTD | Reading | A rating |
| Access NRI Consultancy Pvt. Ltd. | Bristol | A rating |
| Access Retail Limited | moffat | A rating |
| Access Self Storage Limited | London | A rating |
| ACCESS Speech and Language Therapy Limited | Sawbridgeworth | A rating |
| Access Support 24 Limited | Weston-Super-Mare, Somerset | A rating |
| Access the Foundation for Social Investment | LONDON | A rating |
| Access the World Ltd | Halifax | A rating |
| Access Travel Management | Lichfield | A rating |
| Access UK Limited | Loughborough | A rating |
| Access-Storage Ltd | Halesowen | A rating |
| ACCESS24 HEALTHCARE LTD | Milton Keynes | A rating |
| ACCESSAFE UK LTD | BIRMINGHAM | A rating |
| AccessESP UK Limited | Great Yarmouth | A rating |
| ACCESSIA TECHNOLOGY LIMITED | UXBRIDGE | A rating |
| Accession Therapeutics Limited | Abingdon | A rating |
| accesso Technology Group | Ruscombe Business Park | A rating |
| Accessories Gift Centre Ltd T/A HI PROFILE LTD | Hounslow | A rating |
| Accessory World (GG) Limited | London | A rating |
| Accident & Injury Associates Limited | Birmingham | A rating |
| ACCIDENT CLAIM HELPLINE LTD | London | A rating |
| Accident Express Rugby Limited | Rugby | A rating |
| ACCIDENT REPAIR CENTER | LETCHWORTH | A rating |
| Accidental Theatre | Belfast | A rating |
| Accinnoz Limited | Feltham | A rating |
| Accio Research Ltd | Southampton | A rating |
| Accion Labs (UK) Limited | Radlett | A rating |
| Acciona Agua UK Limited | London | A rating |
| Acciona Industrial UK Ltd | Aberdeen | A rating |
| Acciva Techno Soft Limited | Eastham | A rating |
| Accma Ltd | London | A rating |
| ACCO UK LTD | AYLESBURY | A rating |
| Accolade (UK) Limited | London | A rating |
| Accolade Support and Care Ltd | Cheltenham | A rating |
| Accolade Wines Limited | Bristol | A rating |
| Accolite Labs Europe Limited | London | A rating |
| ACCOMAR GLOBAL LTD | London | A rating |
| Accommodation Links Ltd | Stockport | A rating |
| ACCOMMOS LTD | London | A rating |
| Accomplish | Ruislip | A rating |
| Accor HotelServices UK Ltd | London | A rating |
| Accor Luxury UK Limited | London | A rating |
| Accor UK Limited | London | A rating |
| ACCORD ACCOUNTANCY LTD | London | A rating |
| Accord Business Partnerships | Aberdeen | A rating |
| Accord Clinical Support Limited | Harrow | A rating |
| Accord Europe Limited | London | A rating |
| Accord Healthcare Limited | North Harrow | A rating |
| Accord IT Ltd | Hatfield | A rating |
| Accord Multi Academy Trust | Wakefield | A rating |
| Accordia Supported Living Services Limited | Lewes | A rating |
| Accordience Group Limited | London | A rating |
| Accordion Partners UK Ltd | London | A rating |
| Accosoft Technologies Ltd | London | A rating |
| ACCOTAX LONDON LTD | Morden | A rating |
| Account Media Limited | London | A rating |
| Accountagility Limited | London | A rating |
| ACCOUNTANCY & TAX SOLUTIONS (SW) LIMITED | Wimbledon | A rating |
| ACCOUNTANCY AND BOOKEEPING LIMITED | LONDON | A rating |
| Accountancy and Taxation Services | London | A rating |
| Accountancy Global Services Ltd t/a Acumen Plus | Luton | A rating |
| Accountancy Group Ltd | London | A rating |
| Accountancy Managers Limited | Greater London | A rating |
| ACCOUNTANCY SERVICES LONDON LTD | London | A rating |
| ACCOUNTANCY SOLUTIONS ( EAST ANGLIA ) LTD | CAMBRIDGESHIRE | A rating |
| ACCOUNTANCYNET LTD | Manchester | A rating |
| Accountant for Business Ltd | Luton | A rating |
| Accountant on Duty Limited | Southall | A rating |
| ACCOUNTANT PAL LTD | Burnley | A rating |
| ACCOUNTAX CENTRE LTD | London | A rating |
| Accountax Consultants UK Ltd | London | A rating |
| ACCOUNTAX GROUP LTD T/A ACCOUNTAX GROUP | Romford | A rating |
| Accountax World Ltd T/A Accounts and Tax World | London | A rating |
| ACCOUNTAXATION LIMITED | NELSON | A rating |
| Accounting & Business Serv Ltd | Woking | A rating |
| ACCOUNTING & TAX PLANNING UK LIMITED | Leytonstone | A rating |
| ACCOUNTING AND TAX SOLUTIONS | MANCHESTER | A rating |