| ADAYA LTD | Glasgow | A rating |
| ADB CONTRACTS LTD | OLDHAM | A rating |
| ADB Safegate Airport Systems UK Ltd | Manchester | A rating |
| ADB SAFEGATE BV BRANCH UK | London | A rating |
| ADBEK TRANSPORT LTD | Birmingham | A rating |
| Adbell International Limited | London | A rating |
| ADC Infrastructure Limited | Nottingham | A rating |
| ADC Therapeutics (UK) Limited | Reading | A rating |
| Adclaro Limited | London Area, United Kingdom | A rating |
| Adcote School Ltd | Shrewsbury | A rating |
| Add Agility | Southampton | A rating |
| ADD ENTERPRISE INTERNATIONAL LTD | London | A rating |
| ADD GLOW Limited | Ashford | A rating |
| Add-Olives Ltd | London | A rating |
| ADDA GHAR LTD | London | A rating |
| Adda Hospitality Ltd | Newcastle Upon Tyne | A rating |
| ADDAX LONDON LTD | London | A rating |
| Addcare Ltd | Coventry | A rating |
| Addcounsel limited | London | A rating |
| Added Care Ltd | Birmingham | A rating |
| Added Scientific Limited | Nottingham | A rating |
| ADDEPAR UK LTD | Edinburgh | A rating |
| Adder Technology Limited | Cambridge | A rating |
| Adder Technology Limited | Leicester | A rating |
| Adderley Green Surgery | Stoke On Trent | A rating |
| Addesu Ltd | London | A rating |
| Addey and Stanhope School | London | A rating |
| Addfield Environmental Systems Ltd | Burntwood | A rating |
| Addguests Ltd | London | A rating |
| Addi Care Services Ltd | Leicester | A rating |
| Addictd Ltd | EDINBURGH | A rating |
| AddIn365 Ltd | London | A rating |
| Addington Capital LLP | London | A rating |
| Addington Village Cricket Club | Addington | A rating |
| Addionics Limited | London | A rating |
| Addis Fine Art Limited | London | A rating |
| Addison and Khan Solicitors London Limited | Essex | A rating |
| ADDISON BRADLEY & CO. LIMITED | London | A rating |
| Addison House Surgery | Harlow | A rating |
| ADDISON LEE SERVICES LIMITED | London | A rating |
| Addison Partners Limited | London | A rating |
| Addison Road Medical Practice | London | A rating |
| ADDITIONS PLUS LTD | Slough | A rating |
| ADDITIV LTD | London | A rating |
| Additive-X Ltd | Ripon | A rating |
| Addleshaw Goddard LLP | London | A rating |
| Addlestone Electrical Wholesalers Limited | West Byfleet | A rating |
| Addlestone Food & Wine Super Store Ltd | Addlestone | A rating |
| Addlestone Specsavers Limited | Addlestone | A rating |
| AddQual | derby | A rating |
| Address Enterprise Limited | Reading | A rating |
| Address Intelligence Technologies Limited | London | A rating |
| AddSecure Limited | Reading | A rating |
| Addshiyas Ltd | Ilford | A rating |
| ADDSOFT SOLUTIONS LIMITED | Slough | A rating |
| ADE Power Limited | Pontefract | A rating |
| ADE Tax | London | A rating |
| Adea Ltd T/A The Sichuan | London | A rating |
| Adebajo Limited | London | A rating |
| Adebis Ventures UK Limited | Barking | A rating |
| ADEC SOLUTIONS LIMITED | Bourne End | A rating |
| Adecco UK Limited | London | A rating |
| Adecyn Children's Homes | WOLVERHAMPTON | A rating |
| ADEEB FACILITIES MANAGEMENT LIMITED | Ilford, | A rating |
| Adeel Ahmed trading as Sky Energy | Blackburn | A rating |
| Adeena Ltd | Grays | A rating |
| ADEFAKKY LIMITED | Liverpool | A rating |
| Adefey Group Limited | Doncaster | A rating |
| Adel Express LTD | Bath | A rating |
| Adelaide Care Ltd | Cambridgeshire | A rating |
| Adelaide Children Physio ltd | London | A rating |
| Adelaide Family Practice | Blackpool | A rating |
| Adelaide Jones and Co Ltd | London | A rating |
| Adelaide Nursing Home Ltd | Brighton | A rating |
| ADELANTA CONSULTING LTD | London | A rating |
| Adelante Software Ltd | Maidenhead | A rating |
| Adelik Healthcare Ltd | Liss | A rating |
| ADEM SB LTD | STEVENAGE | A rating |
| Ademchic Ltd | London | A rating |
| Ademco 1 Limited | Berks | A rating |
| Aden Engineering & Consultancy Ltd | Birmingham | A rating |
| Aden Health Care Ltd | Northampton | A rating |
| Aden Homes Limited | Chelmsford | A rating |
| ADEN LINA LIMITED | Liverpool | A rating |
| Adena Services Limited | London | A rating |
| ADENCAST LIMITED | Hemel Hempstead | A rating |
| ADENNCAST LIMITED | Rotherham | A rating |
| Adenosh Limited | Kent | A rating |
| ADEO ESTATES PROPERTY CONSULTANTS LIMITED | England | A rating |
| Adepin Consulting Ltd | London | A rating |
| ADEPT ACCOUNTAX LTD | MITCHAM | A rating |
| Adept Care Homes Ltd | Burbage | A rating |
| Adept Consulting (UK) Ltd. | Chepstow | A rating |
| Adept Consulting Engineers | Leeds | A rating |
| Adept Health and Social Care LTD | Leicester | A rating |
| Adept Management | Birmingham | A rating |
| Adeptis Group | Hailsham | A rating |
| Adequita Capital Limited | London | A rating |
| Aderant Legal (UK) Limited | London | A rating |
| ADES SALFORD M7 LTD | SALFORD | A rating |
| ADES LTD | LONDON | A rating |
| Adesgo Ltd | Poole | A rating |
| ADESHIE GATE KIDS LIMITED | BARKING | A rating |
| ADETA FAMILY GROUP LIMITED | LONDON | A rating |
| Adevinta UK Limited | London | A rating |
| ADEX CARE LTD | Liverpool | A rating |
| Adex International Technologies Ltd | Folkestone | A rating |
| ADEX360 LTD | Luton | A rating |
| ADEXA DIRECT LIMITED | Rugby | A rating |
| Adey Innovation Limited | Stonehouse | A rating |
| Adey Steel Ltd | Loughborough | A rating |
| ADF Foods UK Limited | Harrow | A rating |
| ADF London Limited | London | A rating |
| Adfecto Llp | London | A rating |
| Adfin Financial Services Ltd | London | A rating |
| Adform London Limited | London | A rating |
| ADG Accountants (Tax) Limited | Bradford | A rating |
| ADG Market Making LLP | London | A rating |
| ADGAN ELECTRICS LTD | CHEADLE | A rating |
| ADH Prime Foods Limited | Worthing | A rating |
| ADHAM HOTELS LTD | Huddersfield | A rating |
| ADHARA GROUP LIMITED | Rochdale | A rating |
| ADHAV LIMITED t/a Morrisons fuel station | NORFOLK | A rating |
| ADHD Parenting LTD | London | A rating |
| Adhdme Care Limited | London | A rating |
| Adhikari LTD | Sale | A rating |
| Adhisthana Trust | Ledbury | A rating |
| ADHITA LIMITED | Reading | A rating |
| Adhvik 672 Ltd | London | A rating |
| Adi & Aarvi Hospitality Ltd T/A Kahani Restaurant | Edinburgh | A rating |
| ADI & Co Accountants Limited | Slough | A rating |
| ADI APPARELS LTD | MANCHESTER | A rating |
| Adi Car Sales Ltd | Birmingham | A rating |
| ADI Exclusive Limited | Shrewsbury | A rating |
| ADI Facilities Engineering | Birmingham | A rating |
| Adi Logo Ltd | Stockport | A rating |
| Adi Nechasim Limited | London | A rating |
| ADI PHARMA LTD | BEDFORD | A rating |
| ADI TECHNOLOGY LIMITED | Basingstoke | A rating |
| ADI UK Limited | Bolton | A rating |
| Adi&Sons Limited | Coventry | A rating |
| Adia Thermal Ltd. | London | A rating |
| Adicare | Newark on Trent | A rating |
| adidas UK Ltd | Stockport | A rating |
| Adido Limited | Bournemouth | A rating |
| Adient Seating UK Ltd | Birmingham | A rating |
| Adigo Limited | Whitburn | A rating |
| Adil Abbasi T/A Mobilicious | Birmingham | A rating |
| ADIL AHYAN LTD.T/A-Dhabagrillz | Kenley | A rating |
| Adil Electronics Ltd | Bolton | A rating |
| Adil's Convenience Store | Dundee | A rating |
| Adilias Station Road Bakery Ltd | Cambridge | A rating |
| Adina Home Care Service Ltd. | Pinner | A rating |
| ADInstruments Limited | Oxford | A rating |
| ADIOS LONDON LTD | London | A rating |
| Adipro UK & Europe Limited | London | A rating |
| Adira Investment Services Limited | London | A rating |
| Adison Info Limited | Rainham | A rating |
| Adit Driving School Limited | Middlesex | A rating |
| Aditya Supermarket | Sydenham | A rating |
| ADJ Retail Ltd | Cramlington | A rating |
| Adjaye Associates Limited | London | A rating |
| Adjust Software Limited | Watford | A rating |
| ADJUST-A-BED LTD | Dewsbury | A rating |
| ADK ENTERPRISE LIMITED | MANCHESTER | A rating |
| Adkins Consultants Limited | Maidstone | A rating |
| ADL CARE | Leeds | A rating |
| ADL Global Limited | London | A rating |
| ADL Homestore | Birmingham | A rating |
| Adlens Limited | Eynsham | A rating |
| Adler & Allan Limited | Harrogate | A rating |
| ADLER ACCOUNTANTS LTD | LONDON | A rating |
| ADLER HOSPITALITY LIMITED | SLOUGH | A rating |
| Adler Pelzer Washington Limited | WASHINGTON | A rating |
| Adlib Audio Ltd | Liverpool | A rating |
| ADLINGTON CONVENIENCE STORE LTD | Chorley | A rating |
| Adlington Cricket Club | Chorley | A rating |
| ADM AUTOMATION LIMITED | GATESHEAD | A rating |
| ADM Care Homes Limited T/A The Beeches | Rushden | A rating |
| ADM Cars | Coventry | A rating |
| ADM COMPUTING | CANTERBURY | A rating |
| ADM Healthcare Limited | Wednesbury | A rating |
| ADM Pressings Ltd | Newcastle upon Tyne | A rating |
| ADM Promotions UK Limited | London | A rating |
| ADM-Indicia Marketing Services Limited | London | A rating |
| AdMacro Ltd | London | A rating |
| Adman's Health Care Ltd | Bolton | A rating |
| ADMANAGE LIMITED | LONDON | A rating |
| Admax Corporate Homes Ltd | Dudley | A rating |
| Admaxim Limited | London | A rating |
| ADMC ENGINEERING LTD | London | A rating |
| Admenta UK Limited | Coventry | A rating |
| ADMIN & FINANCIAL CONTROLS LTD | Huddersfield | A rating |
| Administrate Ltd | Edinburgh | A rating |
| Adminpower ltd | London | A rating |
| Admiral Care Solutions | Bury | A rating |
| Admiral Healthcare ltd. | Streatham | A rating |
| Admiral Markets UK Ltd | London | A rating |
| Admiral Scaffolding Group Limited | London | A rating |
| Admirals House Ltd T/A Thetford Raj Restaurant | Thetford | A rating |