| ANQ DESIGN & BUILD LTD | London | A rating |
| Anqa Holdings (UK) Ltd | London | A rating |
| ANR Locums Ltd | Bradford | A rating |
| ANR Manufacturing Services Ltd | Bourne End | A rating |
| Anra Deals ltd | Windsor | A rating |
| ANRA Technologies UK Ltd | Cranfield | A rating |
| ANRAHA LIMITED T/A SANGRI | Surrey | A rating |
| ANRC Physiotherapy Clinic | Horsham | A rating |
| ANRI CONVENIENCE STORE | AMERSHAM | A rating |
| Anritsu | Luton | A rating |
| Anros Design & Construction Ltd | Feltham | A rating |
| ANS Accounts Ltd | Suffolk | A rating |
| ANS CARE SOLUTIONS LIMITED | LONDON | A rating |
| ANS DT Services Limited | Fareham | A rating |
| ANS Properties Constructions Limited | Watford | A rating |
| ANS Traders Limited | Glasgow | A rating |
| Ansa Care Limited | Crawley | A rating |
| ANSA Data Analytics Ltd | Aberdeen | A rating |
| Ansaldo Energia Switzerland Ltd | Wolverhampton | A rating |
| Ansarada UK Limited | London | A rating |
| Ansari IT Ltd | Aberdeen | A rating |
| ANSARI RETAIL LTD | Nottingham | A rating |
| Ansari Technology Ltd | Edinburgh | A rating |
| Ansata Hire Solutions Limited | Rotherham | A rating |
| Ansatz Capital UK Ltd | London | A rating |
| ANSCHUETZ UK LTD | Portsmouth | A rating |
| Anschutz Sports Holdings Ltd. | London | A rating |
| Ansel Jobs Ltd | LEICESTER | A rating |
| ANSELL ELECTRICAL PRODUCTS LIMITED | Warrington | A rating |
| ANSER MEHMOOD T/A AMB BUILDERS | BLACKBURN | A rating |
| ANSETT MANAGEMENT CORPS LTD | London | A rating |
| ANSH & KAYRA UK LTD | Harrow | A rating |
| Ansh Soni Limited | Rustington | A rating |
| Anshi Ltd T/A Subway | Grater London | A rating |
| Anshika Communications Limited T/As Vodafone | Isleworth | A rating |
| Ansimicro Software UK Limited | Gloucester | A rating |
| Ansol Limited | Bristol | A rating |
| Anson Care Services Limited | Redruth | A rating |
| ANSONG DESIGN + BUILD LIMITED | FELTHAM | A rating |
| Ansor LLP | London | A rating |
| Anspear Limited | Cambridge | A rating |
| ANSS Limited | Coventry | A rating |
| Anstar Ltd | Leeds | A rating |
| Anstey Bond LLP | London | A rating |
| Anstey Hall Events Limited | Cambridge | A rating |
| Anstey Healthcare ltd | Leicester | A rating |
| Anstey Horne & Co Ltd | London | A rating |
| Anstey Road Business Limited | Alton | A rating |
| Anston Cricket Club | Sheffield | A rating |
| Anston Physiotherapy Ltd | Sheffield | A rating |
| ANSTY CROSS SERVICE STATION LTD | MIDDLESEX | A rating |
| Answertree Ltd | Chinnor | A rating |
| ANSYS UK Ltd | Sheffield | A rating |
| Ant Data Limited | Liverpool | A rating |
| Ant Europe Limited | Kingston Upon Thames | A rating |
| ANT KITCHEN LTD | London | A rating |
| Ant Yapi (UK) Limited | London | A rating |
| Anta Senses Limited | London | A rating |
| Antac Support Services Ltd | High Wycombe | A rating |
| ANTACO (UK) LIMITED | London | A rating |
| ANTALA LTD | Manchester | A rating |
| Antalya Aviation Limited | Croydon | A rating |
| Antalya Mezze BBQ Limited | Leicester | A rating |
| Antara Ltd T/A Indian Cottage | Portsmouth | A rating |
| Antarctica Asset Management (Europe) Limited | London | A rating |
| Antare Technology Limited | London | A rating |
| Antares Global Management Limited | London | A rating |
| Antati Ltd | London | A rating |
| Antavo Limited | London | A rating |
| Antea Group UK | Norwich | A rating |
| AnTech Ltd | Exeter | A rating |
| Antelope Inn | Upavon | A rating |
| ANTEP ENTERPRISES LIMITED | LONDON | A rating |
| Anterior LTD | London | A rating |
| Anthem Schools Trust | London | A rating |
| Anthemis (UK) Limited | London | A rating |
| Anthesis (UK) Limited | London | A rating |
| Anthesis Limited | Congleton | A rating |
| ANTHOLOGY THEATRE PRODUCTIONS LIMITED | London | A rating |
| Anthomania Ltd t/a Untitled Flowers | London | A rating |
| Anthonisz Neville LLP | London | A rating |
| Anthony Best Dynamics Ltd | Bradford on Avon | A rating |
| Anthony Collins Solicitors LLP | Birmingham | A rating |
| Anthony Croft Ezekiel Ltd | London | A rating |
| Anthony Fox Estates Limited | London | A rating |
| ANTHONY GOLD SOLICITORS LLP | London | A rating |
| Anthony Halpin Limited | Ilford | A rating |
| Anthony Honeyball Racing | Mosterton | A rating |
| Anthony James Insurance Brokers Limited | Loughborough | A rating |
| Anthony Toby Homes Trust | Wokingham | A rating |
| ANTHONY'S FAST FOOD LTD | Littlehampton | A rating |
| ANTHOPEC LTD | NORWICH | A rating |
| Anthra Ltd | London | A rating |
| Anthropic Limited | London | A rating |
| AnthroTek Ltd | Newmarket | A rating |
| Anti-Agency (London) Limited | London | A rating |
| Antibody Analytics Limited | Motherwell | A rating |
| Anticimex UK Holdings Ltd | Leigh | A rating |
| Antico Ltd | London | A rating |
| Antidox Limited | London | A rating |
| Antigua and Barbuda High Commission | London | A rating |
| Antika Bar Ltd | London | A rating |
| Antin Infrastructure Partners UK Limited | London | A rating |
| ANTIOCH COMMUNITY CHURCH | SHEFFIELD | A rating |
| Antioch Community Trust | Acton | A rating |
| Antioch Network Manchester | Rochdale | A rating |
| Antipodes Partners (UK) Limited | London | A rating |
| Antithesis UK Limited | London | A rating |
| Antiverse Ltd | Cardiff | A rating |
| ANTLER INNOVATION UK LIMITED | LONDON | A rating |
| Antobot Ltd. | Cambridge | A rating |
| Antofagasta plc | London | A rating |
| ANTOFY LTD | Stoke-on-Trent | A rating |
| Anton Corp Limited | London | A rating |
| Anton Paar (UK) Ltd. | St Albans | A rating |
| ANTON'S FISH & CHIP LTD | Kilmarnock | A rating |
| Antonacci Hair & Beauty Ltd | Manchester | A rating |
| ANTONI & RIENZIE LIMITED | London | A rating |
| Antonias Pizza Limited | Rowley Regis | A rating |
| ANTONIO GROCERY | Barnsley | A rating |
| Antony Co Accountants Ltd | Sutton Coldfield | A rating |
| ANTONY AMALATHAS SOOSAIPILLAI T/A TOP SHOP | Mexborough | A rating |
| Antony Benedict & Joseph Anton Leo-Prince T/A Mediterranean Supermarket | Welling | A rating |
| Antony Hodari Holdings Limited | Manchester | A rating |
| Antony Retail Ltd | Royston | A rating |
| Antrim Hills Spring Water Co Ltd | Ballyclare | A rating |
| Antrim House Dental Practice | Wolverhampton | A rating |
| Ants Advertising And Marketing Ltd | London | A rating |
| Antser Holdings Limited | Birmingham | A rating |
| Antstream Ltd | London | A rating |
| Anturas Consulting Ltd | Edinburgh | A rating |
| Antwerp Dental Group | Cambridge | A rating |
| AntWorks Solutions Limited | London | A rating |
| Antylles Ltd | Glastonbury | A rating |
| Anu Caterers Limited | Basingstoke | A rating |
| ANU FOOD STORE LTD | Motherwell | A rating |
| ANU IMPORT AND EXPORT LTD | LEICESTER | A rating |
| ANU'S SPORTING GOODS LIMITED | Bolton | A rating |
| Anugrah Limited | Watford | A rating |
| Anugraha Watches Limited | Aldershot | A rating |
| Anukampa Bhikkhuni Project | Oxford | A rating |
| Anup Consulting Ltd | Watford | A rating |
| Anupam | Malvern | A rating |
| Anupom London Ltd | London | A rating |
| ANUREDDY LIMITED | Basildon | A rating |
| Anush Prop Limited | North Harrow | A rating |
| ANUSH RETAIL LTD | BIRMINGHAM | A rating |
| ANUSHA LTD | Hailsham | A rating |
| ANUSHKA FOOD & WINE LIMITED | Chesham | A rating |
| Anushree Restaurants Ltd. | Basingstoke | A rating |
| Anutech Limited | London | A rating |
| Anuubhaav Security Solutions Ltd | Solihull | A rating |
| Anuvu UK Operations Limited | Great Warley, Brentwood | A rating |
| Anuyu Hair & Beauty Ltd | Hounslow | A rating |
| ANVIET CUISINE LTD | Eastbourne | A rating |
| ANVIKA LTD | Gloucester | A rating |
| Anvil Analytical Limited | London | A rating |
| ANWA PROPERTIES LTD | London | A rating |
| ANWAR IT SERVICES LTD | Manchester | A rating |
| Anwar's Restaurant Limited | Essex | A rating |
| Anwen Care Ltd | Brigend | A rating |
| Any Other Name Ltd | London | A rating |
| Any waste management Ltd | Peterborough | A rating |
| Anya Consultancy Services Limited | High Wycombe | A rating |
| Anyjunk Limited | London | A rating |
| Anyskills Inc. Limited | Ipswich | A rating |
| Anysphere UK Ltd | Cheltenham | A rating |
| Anything 4 Home Ltd | Stoke-on-Trent | A rating |
| Anything is Possible | brighton | A rating |
| ANYTHING PLUS EVERYTHING LTD t/a Anything and Every Thing | Edinburgh | A rating |
| Anytime Care Solutions | Westcliff on Sea | A rating |
| Anytime Home Care Ltd | Dudley | A rating |
| Anytime Recruitment Limited | Romford | A rating |
| AnyVan Ltd | London | A rating |
| AnyVision (U.K.) Limited | London | A rating |
| ANYWHERE LOGISTICS LIMITED | Evesham | A rating |
| Anywhereworks Ltd | Edinburgh | A rating |
| ANZ DIGITAL LIMITED | Welwyn Garden City, | A rating |
| Anzan Immegration Lawyers Ltd | Birmingham | A rating |
| ANZCRO UK | Pool | A rating |
| ANZI & CO LTD | Hornchurch | A rating |
| ANZUK EDUCATION LTD | LONDON | A rating |
| AO Brands International Limited | London | A rating |
| AO World PLC | Bolton | A rating |
| AOC Architecture Ltd | London | A rating |
| AOC Eventing Limited | Didcot | A rating |
| AOC HOMECARE LTD | Nottingham | B rating |
| AOC Resins UK LTD | Bury St. Edmunds | A rating |
| AOCG LIMITED | Slough | A rating |
| AOE Logistics Limited | Iver | A rating |
| AOI JAPANESE RESTAURANT LTD | HARROW | A rating |
| AOK Care Ltd | London | A rating |
| Aokah UK Ltd | London | A rating |
| AOKI LONDON LIMITED | London | A rating |
| AOM BUILDERS LTD | Hayes | A rating |
| Aon Contracts Ltd | Barnet | A rating |
| Aon UK Limited | London | A rating |
| AONE CHILDREN'S SERVICES LTD | BRISTOL | A rating |
| Aone Dental Practices Ltd T/A Jaws Dental | Fraserburgh | A rating |
| Aones Construction Ltd | HOUNSLOW | A rating |