| AS RECRUITMENT SERVICES LONDON LTD | London | A rating |
| AS REPAIR CENTER LTD | Wolverhampton | A rating |
| AS ROCK LTD T/A Yak & Yeti | Colchester | A rating |
| AS SECURITY LIMITED | Rainham | A rating |
| AS SPORTS LTD | Swindon | A rating |
| AS St Ives Ltd | St Ives | A rating |
| AS SUBAH TRUST | London | A rating |
| AS TRADERS (MCR) LTD | Manchester | A rating |
| AS UK Logistic LTD | ST. HELENS | A rating |
| AS-SAFWAH FOODS LTD | BILSTON | A rating |
| As-Sure Physio Ltd | Stevenage | A rating |
| AS&K Communications Limited | London | A rating |
| ASA Builders & Home Improvement Limited | London | A rating |
| ASA Care Home Limited | East Dean | A rating |
| ASA Care Limited | Worthing | A rating |
| Asa Energy UK Ltd | London | A rating |
| ASA EXPRESS LIMITED | Solihull | A rating |
| ASA GLOBAL SERVICES LTD | Birmingham | A rating |
| ASA Landscape Architects Ltd | Abingdon | A rating |
| ASA UK & Ireland Limited | Liverpool | A rating |
| ASABeauty LTD | hillingdon | A rating |
| Asad Ali (Sole Trader) t/a Shan Accountants | WALSALL | A rating |
| Asad Sheraz Khokher T/A Madina Halal Meat | Harrow | A rating |
| ASAF HK GROUP LIMITED | Birmingham | A rating |
| ASAGA NOODLE BAR LIMITED | Cwmbran | A rating |
| Asahi Europe & International Ltd | Woking | A rating |
| Asahi Glassplant UK Ltd | Royston | A rating |
| Asahi Group International UK Limited | London | A rating |
| Asahi Shimbun Company (European General Bureau) | London | A rating |
| Asahi UK Ltd | Woking | A rating |
| ASAI CONSTRUCTION LTD | Wembley | A rating |
| Asakusa London | London | A rating |
| Asan Shahid Ltd | London | A rating |
| Asana Healthcare Ltd | Towcester | A rating |
| ASANA LEISURE LIMITED | BIRMINGHAM | A rating |
| Asana Software UK Limited | London | A rating |
| Asante Capital Group LLP | London | A rating |
| ASAP Cloud Solutions | Tunbridge Wells | A rating |
| asap Logistics UK Ltd | Cheadle | A rating |
| ASAP Staffing Limited | Luton | A rating |
| ASAP SYSTEMS LIMITED | FELTHAM | A rating |
| ASAPP Limited | London | A rating |
| ASAPRAJ Consulting Ltd | Epsom | A rating |
| ASAR BUSINESS LTD T/A Moza Indian Restaurant | Derby | A rating |
| ASB HAULAGE LTD | Slough | A rating |
| ASB Livery Ltd | Bridgwater | A rating |
| ASB Tech Ltd | Milton Keynes | A rating |
| ASB TRANSPORT LIMITED | Nuneaton, Warwickshire | A rating |
| Asb Wedding Services Ltd | Birmingham | A rating |
| ASBERG CONCEPT LTD | ILFORD ESSEX | A rating |
| ASBESTECH LIMITED | Hatfield | A rating |
| Asbestos Audit Ltd | Peterlee | A rating |
| ASBG GLOBAL LTD | London | A rating |
| ASBUILT DIGITAL UK LIMITED | London | A rating |
| ASC Consullting Ltd | Lee-on-the-Solent | A rating |
| ASC Handling Ltd | Middlesex | A rating |
| ASC Regenity Ltd | London | A rating |
| ASC Technology Limited | Trafford | A rating |
| Ascend Creative Limited | London | A rating |
| Ascend Diagnostics | Manchester | A rating |
| Ascend Digital Solutions Ltd | Manchester | A rating |
| Ascend Laboratories (UK) limited | London | A rating |
| ASCEND LEARNING SYSTEMS LIMITED | LONDON | A rating |
| Ascend Organisational Excellence Ltd | Wilmslow | A rating |
| Ascend SC Europe Limited | London | A rating |
| Ascend Support (South) Limited | London | A rating |
| Ascend Technologies Limited | Southampton | A rating |
| Ascendant Fox Limited | London | A rating |
| AscendantFX Capital UK Limited | Peterborough | A rating |
| Ascendion Engineering Solutions Europe Limited | London | A rating |
| ASCENDX CLOUD LIMITED | London | A rating |
| Ascension Catholic Academy Trust | Twickenham | A rating |
| Ascension Earth Resources Ltd | Oxford | A rating |
| Ascenso Tyres Global Limited | Manchester | A rating |
| Ascensor | Leeds | A rating |
| ASCENT (ELBURTON) LIMITED | Manchester | A rating |
| ASCENT (LEEK) LIMITED | Manchester | A rating |
| ASCENT BUSINESS SOLUTIONS LTD | Coventry | A rating |
| ASCENT CONSULTANTS LTD | LONDON | A rating |
| Ascent Digital Services UK Ltd | Bristol | A rating |
| Ascent Flight Training (Management) Limited | Bristol | A rating |
| Ascent Fund Services (UK) Ltd | London | A rating |
| ASCENT GLOBAL SHIPPING UK LTD | Manchester | A rating |
| ASCENT HEALTHCARE LIMITED | MANCHESTER | A rating |
| Ascent Onsite Services Ltd | Coventry | A rating |
| Ascent Performance Group Limited | Sheffield | A rating |
| Ascent Performance Group Limited | Manchester | A rating |
| Ascentco Catering and Event Management Services Ltd T/A The Shahi | Leicester | A rating |
| Ascenti Physio Limited | Fareham | A rating |
| ASCENTIA SUPPORT SERVICES LTD | Harrow | A rating |
| ASCENTIFY LABS LTD | London | A rating |
| ASCENTIM LEGAL LTD | London | A rating |
| AscentiQ Solutions Limited | London | A rating |
| Ascentis | Lancaster | A rating |
| Ascentium (UK) Limited | London | A rating |
| Ascertia Limited | Guildford | A rating |
| Ascheri & Partners Ltd | London | A rating |
| Aschfords Law Solicitors Limited | London | A rating |
| ASCII Consulting Limited | Wanborough | A rating |
| Asco Cars LTD | Brentford | A rating |
| Asco Engineering Ltd | Skelmersdale | A rating |
| Asco Fixings Limited | Harrow | A rating |
| ASCO Foods Limited | Amersham | A rating |
| ASCO UK Ltd | Aberdeen | A rating |
| Ascom | Lichfield | A rating |
| ASCOM Consulting Limited | Manchester | A rating |
| Ascon Care Services Limited | Dunstable | A rating |
| Ascot Accountancy Limited | Pinner | A rating |
| Ascot Berks Ltd | South Ascot | A rating |
| Ascot Care Agency Ltd | County Durham | A rating |
| Ascot Care Ltd | Horsham | A rating |
| Ascot Cars | Ascot | A rating |
| Ascot Design Limited | Ascot | A rating |
| Ascot Events Limited T/A Ascot Structures | Chipping Norton | A rating |
| Ascot Hyde Park Hotel | London | A rating |
| ASCOT INTERNATIONAL (1996) LIMITED | Cheshire | A rating |
| Ascot Laboratories Limited | Borehamwood | A rating |
| Ascot Lodge Ltd | Southport | A rating |
| Ascot Rehabilitation Limited | london | A rating |
| Ascot Residential Homes Ltd | ASCOT | A rating |
| Ascot Underwriting Holdings Limited | London | A rating |
| Ascott Hospitality Management UK Ltd | London | A rating |
| ASD Accountants LTD | SLOUGH | A rating |
| ASD Build | Cardiff | A rating |
| ASD Build Ltd. | Pontypridd | A rating |
| ASD Care Limited T/A Gosberton House Care Home | Spalding | A rating |
| ASD CONTRACTING LIMITED | Manchester | A rating |
| ASD DEVELOPMENTS LTD | Slough | A rating |
| ASD ELECTRICAL LTD | Preston | A rating |
| ASD RETAIL LTD | Torquay | A rating |
| ASD Transport Birmingham Ltd | Wednesbury | A rating |
| ASD Unique Services LLP | Battle | A rating |
| ASD Warehousing & Distribution LTD | Leicester | A rating |
| Asda Stores Ltd | Leeds | A rating |
| Asdala Ltd | Weston-super-Mare | A rating |
| ASDB Ltd | Croydon | A rating |
| ASE Management Services Limited | London | A rating |
| ASE PLC | Manchester | A rating |
| ASE34 LIMITED | LONDON | A rating |
| ASECCA Limited | Morecambe | A rating |
| Aseel C.E. Ltd | Bolton | A rating |
| ASEES PVT LIMITED T/A Herbies Pizza | Bristol | A rating |
| ASEL Integrated Security Solutions Ltd | London | A rating |
| Aseller A Limited | Burton-On-Trent | A rating |
| Asendia UK Ltd | Hounslow | A rating |
| Aser Media Limited | London | A rating |
| Aser Trading Ltd | Reading | A rating |
| ASESA Solutions Ltd | Holborn | A rating |
| Asesoftware Limited | London | A rating |
| ASF KHAN LIMITED | IRVINE,SCOTLAND | A rating |
| ASF SOFA FRAMES LIMITED | Blackburn | A rating |
| ASFA & AIMA LIMITED | Manchester | A rating |
| ASFAKHUSHEN PATEL TRADING AS MOBILE GALLERY | Prescot | A rating |
| AsFigo Technologies Limited | Chelmsford | A rating |
| ASFIN SOFTWARE & CONSULTANCY LTD | London | A rating |
| Asfordby Chippy Ltd T/As Asfordby Chippy | Melton Mowbray | A rating |
| ASG (UK) TRADING CO. LTD | Leatherhead | A rating |
| ASG Integrated Systems Ltd | Southport | A rating |
| ASG International Trading LTD | Birmingham | A rating |
| ASG NW LTD t/a Tusk | Strabane | A rating |
| ASG Power Systems Limited | Newcastle Upon Tyne | A rating |
| ASG UK PVT LIMITED | Salford | A rating |
| Asgard Controlled Environments Ltd | Manchester | A rating |
| Asgard Estates Ltd | Cambridge | A rating |
| Asgard Group Limited | Sheffield | A rating |
| ASGARD HI-TECH SOLUTIONS LIMITED | South Shields | A rating |
| Asgard Promotions Ltd | London | A rating |
| Asgard Ventures Limited | Tolworth | A rating |
| Asgard Ventures Limited t/a Nagerkovil Arya Bhavan | Tolworth | A rating |
| ASGHAR & SONS LIMITED | Bradford | A rating |
| Asghar & Sons Supermarkets Ltd T/A Asia Continental | Blackburn | A rating |
| ASH & EVEN (UK) LTD | Birmingham | A rating |
| Ash & Lacy Building Systems Limited | West Bromwich | A rating |
| Ash & Lacy Solutions Ltd | West Bromwich | A rating |
| ASH ABI & AROOSH LTD | Knebworth | A rating |
| Ash Accountancy Solutions Ltd | Aberdeen | A rating |
| ASH AND SOPH WINES LIMITED T/A BRYANT ROAD NEWSAGENCY | ROCHESTER , KENT | A rating |
| Ash Bird Ltd | Surrey | A rating |
| ASH CAR HIRE LTD | London | A rating |
| Ash Court Community Limited t/a Ash Court Care Centre | London | A rating |
| Ash Hall Limited T/ AS Ash Hall Nursing Home | Stoke On Trent | A rating |
| ASH KHAN FRESH FRUIT & VEG LIMITED | SMETHWICK | A rating |
| Ash Manor School | Ash | A rating |
| ASH MARKETING SERVICES LTD | ABERDEEN | A rating |
| Ash Pro Ltd | London | A rating |
| ASH ROAD SERVICE CENTRE LIMITED | ALDERSHOT,HANTS | A rating |
| ASH SITE SERVICES LIMITED | Grays, | A rating |
| ASH SPICE COMPANY PVT LTD | Leicester | A rating |
| Ash Surgery | Canterbury | A rating |
| Ash Taxis Limited | Scunthorpe | A rating |
| ASH TECH FUTURES LTD | Strabane | A rating |
| ASH TRANSLATION CO LTD | Waterloo | A rating |
| Ash Tree House | Preston | A rating |
| Ash-Shahada Housing Association Limited | London | A rating |
| ASH2CARE LIMITED T/A Ashfield House | Leominster | A rating |
| ASHA BANGLADESHI CUISINE LTD | Ashurst | A rating |
| ASHA CONSULTING SERVICES LTD | Southampton | A rating |
| ASHA EXPO & CO LTD | MIDDLESEX | A rating |
| Asha Indian Restaurant LTD | Louth | A rating |
| ASHA RESTAURANT (NEWARK) LTD | Newark | A rating |