| Alternative Medicine Incorporated Ltd | Bedford | A rating |
| Alternative Payments Ltd | London | A rating |
| ALTERNATIVE RESIDENTIAL CAPITAL GROUP LTD | Harrow | A rating |
| Alternatives Trust East London | London | A rating |
| Alternergy Limited | London | A rating |
| Altero Capital UK Ltd | London | A rating |
| Alters Recruitment Ltd | Stratford | A rating |
| Altery Ltd | London | A rating |
| Alteryx UK Limited | London | A rating |
| ALTHAM CARE LIMITED | Accrington | A rating |
| Althrey Holdings Limited | Wrexham | A rating |
| AlTi Wealth Management (UK) Limited | London | A rating |
| Altido Scotland Ltd | Edinburgh | A rating |
| Altilium Metals LTD | Plymouth | A rating |
| Altimapa Limited | London | A rating |
| Altimate Care Services UK Ltd | Romford | A rating |
| Altimetrik UK Ltd | Wokingham | A rating |
| Altimus Retailers Limited | London | A rating |
| Altin Homes Limited | Altrincham | A rating |
| ALTIOS INTERNATIONAL UK LIMITED | London | A rating |
| Altis Global Limited | London | A rating |
| Altis Partners Limited | London | A rating |
| Altium UK Limited | Cambridge | A rating |
| ALTIUS CONSULTANTS LTD | Belfast | A rating |
| Altman Solon LLP | London | A rating |
| Altmore Dental Practice | London | A rating |
| Altmore NI Ltd T/A The Valley Hotel | Fivemilestown | A rating |
| Altmore Practice Limited | Isle of Dogs, London | A rating |
| Alto Cars Ltd | Hartley Wintney | A rating |
| Alto Hearing Limited | Lutterworth | A rating |
| Altodata Ltd | Sevenoaks | A rating |
| Altogether Care LLP | Weymouth | A rating |
| Altomart Ltd | Harrow | A rating |
| ALTON & CO. | LONDON | A rating |
| Alton Aviation Consultancy UK Limited | London | A rating |
| Alton Convenience Store Limited | Alton | A rating |
| Alton Cricket Club | Alton | A rating |
| Alton Manor Care Home | Southsea | A rating |
| Alton Specsavers Limited | Alton | A rating |
| Alton Street Surgery | Ross-on-Wye | A rating |
| Alton Surgery | Stoke on Trent | A rating |
| Altonexus Limited | Wimbledon | A rating |
| Altos Labs UK Limited | Great Abington | A rating |
| AltoVolo Ltd | Gerrards Cross | A rating |
| Altrad Employment Services Limited | Rotherham, England | A rating |
| Altrad Integrity Services Limited | Aberdeen | A rating |
| Altria Ventures UK Ltd | London | A rating |
| ALTRIUM FINANCIAL SERVICES Ltd | LONDON | A rating |
| Altrix Technology Ltd | London | A rating |
| Altro Limited | Letchworth Garden City | A rating |
| ALTRUISTIC CARE LIMITED | STOCKPORT | A rating |
| Altruistic Ventures Limited | London | A rating |
| ALTRULLO LTD | VERWOOD | A rating |
| Altrum UK Limited | London | A rating |
| Altta Group Limited | Peterborough | A rating |
| Altum Capital Management (UK) Ltd | London | A rating |
| Altum Health Limited | London | A rating |
| Altum Organisation Limited | Cardiff | A rating |
| ALTUM PARTNERS CONSULTING LIMITED | London | A rating |
| Altun Retail Limited | London | A rating |
| Altura Platform Ltd | London | A rating |
| Altus Construction Ltd | London | A rating |
| Altus Education Partnership | Rochdale | A rating |
| Altus Group Ltd | Redditch | A rating |
| Altus Investment Management Limited | London | A rating |
| Altus Partners Ltd | London | A rating |
| Altus Science Limited | Runcorn | A rating |
| Altus Technologies Ltd | Horsham | A rating |
| ALTUS UW LIMITED | London | A rating |
| Altus Ventures Limited | London | A rating |
| Altwood C of E School | Maidenhead | A rating |
| AltynGold plc | Rikmansworth | A rating |
| Alubadia Orphanage | Halifax | A rating |
| Alufix labour ltd | liverpool | A rating |
| Alula Insurtech Ltd | London | A rating |
| Alula Technologies Ltd | London | A rating |
| Alula Therapy Ltd | London | A rating |
| Alulbayt Foundation | London | A rating |
| Alum Care Ltd T/A Kings Lodge Nursing Home | Redhill | A rating |
| Alum Optical Ltd T/a Hawthorns Eyecare | Smethwick | A rating |
| Alum Rock Medical Centre | Birmingham | A rating |
| ALUMAN SYSTEMS UK LIMITED | London | A rating |
| Aluminium & Glass Facades Ltd | Peterborough | A rating |
| Aluminium Service Company Warwick Ltd | Warwick | A rating |
| ALUMNI VENTURES UK, LLP | Harrow | A rating |
| ALUMROCK BUTCHER LTD | Birmingham | A rating |
| Alumrock Cake Box Limited | Birmingham | A rating |
| Aluna Partners Limited | Beds | A rating |
| Aluna Partners LTD | London | A rating |
| ALV SERVICES LIMITED | Sunbury-On-Thames | A rating |
| Alva Capital LLP | Fitzrovia | A rating |
| Alva Coachwork Ltd | London | A rating |
| ALVA LG LIMITED | London | A rating |
| Alvan Blanch Dev Co Ltd | Malmesbury | A rating |
| Alvance British Aluminium Ltd | Fort William | A rating |
| Alvarez & Marsal Europe, LLP | London | A rating |
| Alvaston Medical Centre | Derby | A rating |
| Alvatek Ltd. | Southampton | A rating |
| Alverium Health Limited | Cobham | A rating |
| Alverstoke House Nursing Home | Fareham | A rating |
| Alves iCare Ltd | Peterborough | A rating |
| ALVI BROTHERS LTD | Nottingham | A rating |
| Alvi Health And Safety Consultancy Company Limited | Hounslow | A rating |
| Alvi Traders UK LTD | Birmingham | A rating |
| Alvina Lodge | Hayes | A rating |
| Alvington House Dental Practice | Bury St Edmunds | A rating |
| ALVIZ STUDIOS LTD | Edgbaston, Birmingham | A rating |
| Alvony House Ltd | Bristol | A rating |
| ALVORI LTD | DORSET | A rating |
| Alvotech UK Limited | London | A rating |
| Always Growing Ltd | Windsor | A rating |
| Always Inclusive Ltd | Orpington | A rating |
| ALWAYSSMILE ONLINE LTD | London | A rating |
| ALWAYSTRUSTED LIMITED | Leicester | A rating |
| Alwis Solutions Limited | Milton Keynes | A rating |
| Alwoodley Medical Centre | Leeds | A rating |
| Alxha Ltd | London | A rating |
| Aly Enterprises Limited | Coventry | A rating |
| Alya Amore Limited | Stockport | A rating |
| ALYA LONDON LTD | London | A rating |
| ALYAAN FINANCE SOLUTIONS LTD | Manchester | A rating |
| ALYAAN TRADERS LTD | Manchester | A rating |
| ALYALAIS PROTECTED FALCON LIMITED | Dumfries | A rating |
| Alyana UK Ltd | Cardiff | A rating |
| ALYIL LTD | Poole | A rating |
| ALYMCC LTD | Marlborough | A rating |
| Alysia Caring (Aspen Manor) ltd | Oakham | A rating |
| Alysia Caring (Silver Birch) ltd | Ipswich | A rating |
| Alysia Caring (Stamford) Ltd | Stamford | A rating |
| Alyson House | Essex | A rating |
| Alyyzandre Studio Limited | London | A rating |
| Alza Accounting & Management Solutions Ltd | Wraysbury | A rating |
| ALZAIN KITCHEN LTD | Leicester | A rating |
| ALZARIF LTD | LONDON | A rating |
| Alzheimer's Research UK | Cambridge | A rating |
| AM & LM Limited | Birmingham | A rating |
| AM 2 AM Limited | London | A rating |
| AM 2 PM Convenience Stores Limited | London | A rating |
| AM 2 PM News Express | Watford | A rating |
| AM Alliance Ltd. | Sevenoaks | A rating |
| AM AND DJ LIMITED | Twickenham | A rating |
| Am Auto Mechanics Ltd | Stoke-On-Trent | A rating |
| AM Bid Services Ltd | North Berwick | A rating |
| AM BODY REPAIRS LIMITED | Birmingham | A rating |
| AM Builders (Luton) Ltd,. | LUTON | A rating |
| AM CAR PARTS LIMITED | BARKING | A rating |
| AM Civil Engineering Services Ltd | Belfast | A rating |
| AM Coffee Retail Limited | Wembley | A rating |
| AM Diagnostic Imaging Ltd | Stanley | A rating |
| AM E WORKS LTD | Bristol | A rating |
| AM FRESH UK Ltd | Peterborough | A rating |
| AM Grills Limited | London | A rating |
| AM HALAL MEATS @WHOLESALES LTD | LEICESTER | A rating |
| AM Homecare Services Ltd | Wokingham | A rating |
| AM Insights Technology Limited | London | A rating |
| AM LECCY LTD | Woodford | A rating |
| Am Legends Barber Ltd | London | A rating |
| AM Low Carbon Consulting Limited | Brockenhurst | A rating |
| Am MCR LIMITED | Manchester, | A rating |
| AM MOBILE LTD | Chichester | A rating |
| AM Pakistan Catering Ltd | Birmingham | A rating |
| AM PHONE TRADING LIMITED | Manchester | A rating |
| AM Pizza UK Ltd. T/A Domino's Pizza | Essex | A rating |
| AM Plumbing and Heating Services Limited | Luton | A rating |
| AM PROFESSIONAL LTD | Manchester | A rating |
| AM PROPERTY INVEST LTD | BURY | A rating |
| AM Shakes Ltd | Aberdeen | A rating |
| AM Surveying & Block Management | Maidstone | A rating |
| AM Trading UK Limited | London | A rating |
| AM Victual Ltd | Birmingham | A rating |
| AM VINTAGE RETAIL UK LIMITED | London | A rating |
| AM Woodley Limited T/A Gausia M M Hijab | London | A rating |
| AM-R-AZ LLP | Daventry | A rating |
| AM:PM BELFAST LIMITED | Belfast | A rating |
| AM2PM Quality Care Limited | Banstead | B rating |
| AM3 ELECTRICALS LTD | London | A rating |
| AMA by Andrea Marino Ltd | London | A rating |
| Ama Leaders Ltd | Shifnal | A rating |
| AMA PIZZA WANTAGE LIMITED | Wantage | A rating |
| AMA POSTMAIL LIMITED | KIRKCALDY | A rating |
| AMA Superfutures | London | A rating |
| AMAAM GLOBAL LTD | Stoke-On-Trent | A rating |
| Amaams LLP | Colchester | A rating |
| AMAAN CONSTRUCTION LTD | HALIFAX | A rating |
| AMAAN GRILL HOUSE LTD | Bradford | A rating |
| Amaan Jewellers | Sheffield | A rating |
| AMAAN POUND SHOP AND GROCERIES LIMITED | Leicester | A rating |
| Amaan Trader LTD | BIRMINGHAM | A rating |
| Amaan Trading Limited | Luton | A rating |
| Amaana Care Limited | Bedford | A rating |
| Amaani Beauty LTD | Berkshire | A rating |
| Amaans Grill House | Bradford | A rating |
| Amaar Trading Limited | Manchester | A rating |
| Amab Ltd T/A Green Lane Pre-School | Ilford | A rating |
| Amachyck Care and Beauty Salon | Dagenham | A rating |
| Amachyck Care Solution Ltd | London | A rating |
| Amack Ltd | Woking | A rating |
| Amada United Kingdom Limited | Kidderminster | A rating |
| Amadeus Consultancy Limited | London | A rating |
| Amadeus IT Services UK Limited | Hounslow | A rating |