| Advanta Investments Ltd | Glasgow | A rating |
| ADVANTA LOSS ADJUSTERS LIMITED T/A ADVANTA INTERNATIONAL ADJUSTERS | London | A rating |
| Advantage 1 Security Limited | Redditch | A rating |
| Advantage Accounting (Scotland) LTd | Glasgow | A rating |
| Advantage Angels Limited | Ipswich | A rating |
| Advantage Basements & Cellar Company Limited | Wandsworth | A rating |
| Advantage Business Systems Limited | London | A rating |
| Advantage Health & Social Care Ltd | Stourport-On-Severn | A rating |
| ADVANTAGE HOTELS (WALSALL) LTD | Harrow | A rating |
| Advantage NRG Ltd. | Chorely | A rating |
| Advantage Rock Ltd | London | A rating |
| Advantage Schools | Bedford | A rating |
| ADVANTAGE SECURITY LIMITED | Birmingham | A rating |
| Advantage Shield Haven Ltd | London | A rating |
| Advantage Smollan Limited | Winnersh | A rating |
| Advantage Solicitors Ltd T/A Advantage Solicitors | London | A rating |
| Advantage Utilities Limited | London | A rating |
| ADVANTAX ACCOUNTANTS LTD | Ealing | A rating |
| Advantech Europe BV UK Branch | London | A rating |
| Advantex Network Solutions Limited | Gateshead | A rating |
| Advantix Limited | Northwood | A rating |
| Advanz Pharma Services (UK) Limited | London | A rating |
| Adveco (AWP) Limited | Farnborough | A rating |
| Advencap UK Limited | London | A rating |
| Advent Bioservices | Cambridge | A rating |
| Advent Care Solutions Ltd | Harrow | A rating |
| Advent Data Solutions Ltd | Stanmore | A rating |
| Advent Estates Ltd t/a Field Farm House Residential Home | Herefordshire | A rating |
| ADVENT FINANCIAL SERVICES LTD | HARROW | A rating |
| Advent International Ltd | London | A rating |
| Advention Business Partners (UK) Limited | London | A rating |
| Adventoris Ltd | Huddersfield | A rating |
| Adventum Corporation Limited | London | A rating |
| Adventure Attractions Ltd | Bournemouth | A rating |
| Adventure Builders Limited | Langley | A rating |
| Adventure Pictures Ltd | London | A rating |
| ADVENTURE PRIVATE TRANSPORT LTD | Accrington | A rating |
| Adventurize Ltd | Stratford-Upon-Avon | A rating |
| Adventurous Journeys UK Ltd | London | A rating |
| Adverity Ltd. | London | A rating |
| Advertising Principles Holdings ltd t/a Fusion Unlimited | headingley | A rating |
| Advertising Week Europe Ltd | London | A rating |
| Adverto Media Ltd | Gloucester | A rating |
| ADVFN LTD | London | A rating |
| Advice Cloud Limited | Brighton | A rating |
| Advice Doctor LTD t/a Annabel House Care Centre | Weston super Mare | A rating |
| Advice NI | Belfast | A rating |
| AdVini UK Limited | London | A rating |
| Advinia Care Homes | Finchley | A rating |
| Advised Ltd | London | A rating |
| ADVISION INTERNATIONAL LTD | London | A rating |
| Advita Ltd T/As Smart food and wine | HAMPSHIRE | A rating |
| ADVIZZO LIMITED | MANCHESTER | A rating |
| ADVOCATE GROUP LTD | NORTHAMPTON | A rating |
| Advoco Solutions Limited | Silchester | A rating |
| Advokatfirmaet Kromann Reumert | London | A rating |
| Advokatfirmaet Thommessen AS | London | A rating |
| Adwuma Ltd | London | A rating |
| ADWYSD LTD | London | A rating |
| Adxba | Stalybridge | A rating |
| Adyan Limited | Skegness | A rating |
| ADYEN N.V. LONDON BRANCH | London | A rating |
| Adyoulike Limited | London | A rating |
| ADZ Food Distribution Ltd | Bolton | A rating |
| ADZ NETWORK LTD T/A Chillies Tandoori | London | A rating |
| ADZACTLI LTD | Bath | A rating |
| ADZENX LTD | London | A rating |
| Adzuna Limited | London | A rating |
| AE Bakery Limited | Brentford | A rating |
| AE Convenience ltd | Southampton | A rating |
| AE Corp UK Limited | London | A rating |
| AE Energy Consulting Limited | ABERDEEN | A rating |
| AE Industry UK Branch | London | A rating |
| AE Portsoken Asset Management Ltd | Hampstead | A rating |
| AEA Consulting Worldwide Ltd | London | A rating |
| AEA Investors (UK) LLP | London | A rating |
| AEA SUPPLY LTD | ENGLAND | A rating |
| AEC Consultant Limited | London | A rating |
| AEC SYSTEMS LTD | London | A rating |
| AECOM ENGINEERING TECHNOLOGY SERVICES LTD | London | A rating |
| AECOM LIMITED | London | A rating |
| Aecoz Bioware Ltd | Kent | A rating |
| Aed Energy Ltd | London | A rating |
| AEDS Consultants Limited | Warwick | A rating |
| AEEIW Ltd | RAINHAM | A rating |
| AEG Construction Limited | Derby | A rating |
| AEG Fuels UK Limited | Crawley | A rating |
| AEG Presents Ltd | London | A rating |
| AEG Technologies Limited T/A Connect | London | A rating |
| Aegaea Ltd | Brighton | A rating |
| AEGE ENERGY (UK) LTD | Stirling | A rating |
| Aegean Airlines SA | Hounslow | A rating |
| AEGEAN ESTATE LTD | London | A rating |
| AEGEAN FOOD & DRINK LIMITED | London | A rating |
| AEGEAN SEA PARTNERS LIMITED | London | A rating |
| Aegg Limited | Eye | A rating |
| AEGIQ LTD | Sheffield | A rating |
| Aegis Care Solutions Ltd | Leeds | A rating |
| Aegis Energy Ltd | London | A rating |
| Aegis Group of Companies t/a Aegis Support Services | Luton | A rating |
| Aegis Managing Agency Limited | London | A rating |
| AEGIS OUTSOURCING UK LIMITED | Harrow, | A rating |
| Aegis Residential Care Homes Limited | London | A rating |
| Aegis Trust | Nottingham | A rating |
| Aegis UK - Recruiting and Consulting Ltd | London | A rating |
| AEGON UK PLC | London | A rating |
| Aeguana Ltd | London | A rating |
| aegyptus ltd t/a Kaya | Cardiff | A rating |
| Aegys Smart Care Ltd | London | A rating |
| AEH Innovative Hydrogel | Manchester | A rating |
| AEH UK Limited | Isleworth | A rating |
| AEI Compounds Ltd | Ramsgate | A rating |
| AEI Music Limited | London | A rating |
| AEI Solutions Limited | Manchester | A rating |
| AEI SYSTEMS LIMITED | Uxbridge | A rating |
| AEJIS OFF LICENCE | WINSFORD | A rating |
| Aelfgar Surgery | Rugeley | A rating |
| AELIYA FOODS LTD | Essex | A rating |
| AELML Limited | London | A rating |
| AEM BUSINESS LTD T/A FLUIDS LABS | SOMERSET | A rating |
| AEO-UK Limited | London | A rating |
| Aeon Capital Investments Ltd | London | A rating |
| Aeon Energy Ltd | London | A rating |
| Aeon Trisl Investments Limited | London | A rating |
| Aeorema Limited | London | A rating |
| AEP PRECISION CO., LTD UK Branch | London | A rating |
| AEP UK LTD | Northampton | A rating |
| AEQUITAS ACCOUNTANTS LTD | PINNER | A rating |
| Aequitas Group Limited, trading as Executive Nexus | London | A rating |
| Aera Technology Limited | London | A rating |
| Aeracura limited | Crewe | A rating |
| Aeramine Ltd | Newport Pagnell | A rating |
| AerFin Limited | Crawley | A rating |
| Aeria Homecare Ltd | Taunton | A rating |
| Aerial Days Limited | London | A rating |
| Aerial Edge Circus Schools CIC | Glasgow | A rating |
| Aerios Limited | Reigate | A rating |
| Aerius Marine UK Ltd | Hartlepool | A rating |
| AERIVO GROUP UK LIMITED | Manchester | A rating |
| Aermont Capital LLP | London | A rating |
| AERO ASSOCIATED SERVICES GROUP LTD | West Drayton | A rating |
| AERO CARGO (UK) LTD | Berkshire | A rating |
| Aero Engine Services Ltd. | Cardiff | A rating |
| AERO HEALTHCARE LTD | HORSHAM | A rating |
| Aero Leather Clothing Co | Galashiels | A rating |
| Aero Travel Groups Limited | Brentwood | A rating |
| AeroCloud Systems Limited | Stockport | A rating |
| Aerocom UK Ltd | Nottingham | A rating |
| Aerodyne Global Limited | Bourne | A rating |
| Aeroelasticity & Nonlinear Analyses Specialists LTD | London | A rating |
| Aerofin IT Solutions and Consulting Services Limited | Feltham | A rating |
| AEROGEL CORE LIMITED | Bath | A rating |
| Aerogen Lifesciences UK Ltd | London | A rating |
| Aerolinks Travel Limited | London | A rating |
| Aeromet International Ltd | Sittingbourne | A rating |
| Aeron Branding Limited | London | A rating |
| Aeron Vets Ltd | Lampeter | A rating |
| Aeronox Limited | Ilford | A rating |
| Aeropeople Limited | Stansted | A rating |
| Aeropeople Limited | Essex | A rating |
| Aeroplas Uk Ltd | Great Bridge | A rating |
| Aeros Limited | Coventry | A rating |
| Aeroservices Ltd | Leeds | A rating |
| AEROSPACE ENGINEERING SOLUTIONS LTD | BRAINTREE | A rating |
| Aerospace Technology Institute | London | A rating |
| aerospaceHV Ltd | Manchester | A rating |
| Aerospares 2000 Ltd | Watford | A rating |
| AEROSPEED 24/7 LTD | London | A rating |
| AEROSPHERES (UK) LIMITED | HARROW | A rating |
| Aerotech Limited | Reading | A rating |
| Aerotech Solutions Ltd | Sittingbourne | A rating |
| AeroTex UK LLP | Farnborough | A rating |
| Aerotrope Limited | Brighton | A rating |
| Aertec Solutions Ltd | Chester | A rating |
| Aerzen Machines Ltd | Loughton | A rating |
| AES OXF ST LIMITED | London | A rating |
| AES Smart Metering | London | A rating |
| AES Sustainability Consultants Limited | Tiverton | A rating |
| AESC UK PLANT 1 LIMITED | Sunderland | A rating |
| AESG Ltd | City of London | A rating |
| AESN Care Limited | Uxbridge | A rating |
| AESN LIMITED | Heathrow | A rating |
| Aesop UK Limited | London | A rating |
| AESSEAL plc | Rotherham | A rating |
| AESTHELUNA LIMITED | London | A rating |
| Aesthethically Ltd | Uxbridge | A rating |
| Aesthetic Beauty Training Ltd | Bristol | A rating |
| Aesthetic care beauty clinic ltd | Heywood | A rating |
| AESTHETIC DENTAL IMPLANTS TEAM LIMITED | LONDON | A rating |
| Aesthetic Integration Limited | London | A rating |
| Aesthetic Smiles | Leicester | A rating |
| Aesthetic Technology Ltd | Warrington | A rating |
| Aesthetica Dental Clinique | Warlingham | A rating |
| Aesthetica Solutions Limited | Staines | A rating |
| Aesthetics by Faiza Ltd | Bolton | A rating |
| Aesthetics Clinique Ltd | London | A rating |
| AESTHETICS INT- BEAUTY FOR ALL LTD | Derby | A rating |
| AESTHEZIA LIMITED | Whiteley | A rating |
| AET PARTNERS LTD | London | A rating |
| AET UK Ltd | London | A rating |