| Archway Learning Trust | Nottingham | A rating |
| Archway Medical Centre | London | A rating |
| Archway Peterborough Table Tennis Club | Peterborough | A rating |
| Arcimboldo Productions Limited | LONDON | A rating |
| Arcing enterprises ltd | London | A rating |
| ARCLID FARM LTD | SANDBACH, BERETON | A rating |
| ARCM UK Ltd T/A Anand George's Indian Kitchen | Cardiff | A rating |
| Arcmont Asset Management Limited | London | A rating |
| Arco Academy | London | A rating |
| Arco Frozen Ltd | Manchester | A rating |
| Arco Ltd | Hull | A rating |
| Arcola Products Limited | Sittingbourne | A rating |
| Arcola Theatre Production Company | London | A rating |
| Arcomedical Infusion Ltd | Stafford | A rating |
| ARCONIC MANUFACTURING (GB) LIMITED | Birmingham | A rating |
| Arcs Retail Ltd T/A Queens Road Stores - Premier | Shropshire | A rating |
| Arctic Cloud Solutions Ltd | Glasgow | A rating |
| Arctic Glass (UK) Ltd | Blackburn | A rating |
| Arctic Hayes Ltd | Leeds | A rating |
| Arctic Lake Technology Ltd | London | A rating |
| Arctic Research and Development Limited | Cirencester | A rating |
| Arctic Seal (MCR) Limited | Manchester | A rating |
| Arctic Wolf Networks UK Limited | Newcastle Upon Tyne | A rating |
| Arctiq Services LLP | London | A rating |
| Arctis Management UK Limited | London | A rating |
| Arctoris LTD | Abingdon | A rating |
| Arctos Europe LLP | London | A rating |
| Arcturis Data (UK) Limited | OXFORD | A rating |
| Arcturus Capital Advisors Ltd | Brighton | A rating |
| ARCTURUS PUBLISHING LIMITED | Canterbury | A rating |
| ARCTURUS TECHNOLOGY LTD | Blackburn | A rating |
| Arcus Capital Ltd | Norwich | A rating |
| Arcus Consulting LLP | Newcastle Upon Tyne | A rating |
| Arcus FM Limited | Brentwood | A rating |
| Arcus Foundation | Cambridge | A rating |
| Arcus Global Limited | Cambridge | A rating |
| Arcus Infrastructure Services LLP | London | A rating |
| Arcwide UK & I Limited | London | A rating |
| Arcwide UK Limited | London | A rating |
| ARD-LIFT ELEVATOR (UK) LTD | MANCHESTER | A rating |
| Ardach Health Centre | Buckie | A rating |
| Ardagh Glass Limited | Knottingley | A rating |
| Ardagh Metal Packaging UK Limited | Chester | A rating |
| Ardale (Potters Grange) Ltd | Potters Bar | A rating |
| Ardale (Welwyn Grange) Ltd | Welwyn Garden City | A rating |
| ARDAS TRANSPORT LTD | Stoke-On-Trent | A rating |
| Ardatem UK Ltd | Bristol | A rating |
| Ardboe Coldstore Ltd | Dungannon | A rating |
| Ardea Investment Management (UK) Limited | London | A rating |
| ARDEA PARTNERS INTERNATIONAL LLP | London | A rating |
| Arden Associates (IFA) LLP | Droitwich | A rating |
| Arden International Motorsport Limited | Banbury | A rating |
| Arden Motorsport Limited | Banbury | A rating |
| Arden Photonics Limited | Solihull | A rating |
| Arden University | Coventry | A rating |
| Ardent Care Connect Services | Reigte | A rating |
| Ardent Care Ltd | Nottingham | A rating |
| Ardent Credit Services (UK) Ltd | Liverpool | A rating |
| Ardent Financial Limited | London | A rating |
| Ardent Hire Solutions Ltd | Wyboston | A rating |
| Ardent Limited | YORK | A rating |
| Ardent Oil Resources Limited | London | A rating |
| Ardent Residential Care Home | Plymouth | A rating |
| ARDENT SMILE LTD | London | A rating |
| Ardenton Care Holdings Limited | Dunfermline | A rating |
| Ardern Hodges Limited | London | A rating |
| Ardersier Port (Scotland) Ltd | Inverness | A rating |
| Ardeshir Diznabi | Brighton | A rating |
| Ardesia Aesthetics Ltd | London | A rating |
| Ardfin Estate Limited | Isle of Jura | A rating |
| Ardgay Game | Bonar Bridge | A rating |
| Ardgowan Hospice Ltd | Greenock | A rating |
| Ardian Investment UK Limited | LONDON | A rating |
| Ardis Services Ltd | Henley-in-Arden | A rating |
| ARDIT PAINTERS & DECORATORS LTD | Gravesend | A rating |
| Ardmac Performance Contracting Limited | Manchester | A rating |
| Ardmel Automation Limited | GLENROTHES | A rating |
| Ardmore Construction Group Limited | London | A rating |
| Ardmore Cricket Club | Derry | A rating |
| Ardmore Veterinary Group Ltd | Sudbury | A rating |
| ARDO MAESTRO LTD | LONDON | A rating |
| Ardo UK | Charing | A rating |
| Ardonagh Services Limited | London | A rating |
| Ardonagh Specialty Holdings Ltd. | London | A rating |
| Ardoq UK Limited | London | A rating |
| Ardour world Limited | London | A rating |
| Ardra & Athira Restaurants Ltd | Bristol | A rating |
| Ardra and Athira Streets Limited | Bristol | A rating |
| Ards Business Centre Limited | Newtownards | A rating |
| ARDSTRAW QUARRIES LTD | Strabane | A rating |
| Ardtully Retirement Residence | Ingatestone | A rating |
| AREA 37 LIMITED | Newport | A rating |
| Area Sq. Limited | Egham | A rating |
| Aream Group LLP | London | A rating |
| Areb Ltd | Perth | A rating |
| Arecor Ltd | Saffron Walden | A rating |
| Areeba Bristol Ltd T/A, New Rupali | Bristol | A rating |
| Aregon Care Ltd | Tipton | A rating |
| AREGROUP LTD | London | A rating |
| Areli Care Ltd | Brighton | A rating |
| Aren Enterprises Ltd | London | A rating |
| Arena Event Services Group Ltd | St Ives | A rating |
| Arena Investors UK Limited | London | A rating |
| ARENA LOUNGE UK LTD | Wembley | A rating |
| Arena Online | Droitwich Spa | A rating |
| Arena Retail Ltd | Portsmouth | A rating |
| ARENA SECURITY LTD | Hitchin | A rating |
| Arena Tiles and Bathrooms Ltd | Hemel Hempstead | A rating |
| Arendt & Medernach London Limited | London | A rating |
| Arenko Cleantech Limited | London | A rating |
| ARENS MANAGEMENT LIMITED T/A Arens Bar & Grill | Ruislip | A rating |
| ARES Landscape Architects | Sheffield | A rating |
| Ares Management Limited | London | A rating |
| Aress Cash & Carry Ltd | London | A rating |
| Arete Capital Partners LLP | Liverpool | A rating |
| Arete Learning Trust | Stokesley | A rating |
| Arete Medical Technologies Ltd | Cambridge | A rating |
| Areteans Technology Solutions UK Limited | London | A rating |
| Areva Consultancy Limited | Dartford | A rating |
| ARG BUSINESS ASSOCIATES LIMITED t/a Redcroft Care Home | Colwyn Bay | A rating |
| ARG Global Ltd t/a Tarry's Residential Home | Enfield | A rating |
| ARG11 Limited T/A Ambala Restaurant | Glasgow | A rating |
| ARGA Investment Management UK Limited | London | A rating |
| Argent Design Limited | London | A rating |
| Argent Energy Ltd | Ellesmere Port | A rating |
| Argent Labs Limited | London | A rating |
| Argenta Dundee Ltd | Dundee | A rating |
| Argenta Projects Limited | London | A rating |
| Argenta Syndicate Management Limited | London | A rating |
| Argentem Creek UK LLP | London | A rating |
| Argentil Capital Partners (UK) Limited | London | A rating |
| Argentum Data Solutions Ltd | Windsor | A rating |
| Argentum Lodge Ltd | Bristol | A rating |
| Argenx UK Ltd | Gerrards Cross | A rating |
| ARGF LIMITED | Corby | A rating |
| Arggen1ltd TA Dentcare1 Smile | Nottingham | A rating |
| ARGHYA ENTERPRISES LTD | RICKMANSWORTH | A rating |
| Argo Natural Resources Limited | London | A rating |
| ARGO-HYTOS Ltd | Rotherham | A rating |
| Argon & Co UK Ltd | London | A rating |
| Argon Electronics UK Ltd | Luton | A rating |
| Argon Innovations Limited | Newport Pagnell | A rating |
| Argon Medical Devices UK Ltd | Burton on Trent | A rating |
| Argonon Ltd | London | A rating |
| Argos Industries Limited | Bradford | A rating |
| Argti Software & IT Solutions UK Ltd | Preston | A rating |
| Argus Software (UK) Ltd | London | A rating |
| Argyle IT & Education Limited | Edinburgh | A rating |
| Argyle Medical Group | PEMBROKE DOCK | A rating |
| Argyle Satellite LTD | Birkenhead | A rating |
| Argyll and Bute Council | Lochgilphead | A rating |
| ARGYLL BATHROOMS LIMITED | OBAN | A rating |
| Argyll Energy Services Limited | Hertfordshire | A rating |
| Argyll News Limited | London | A rating |
| Argyll Productions Ltd | London | A rating |
| arh portable and modular buildings ltd | HULL | A rating |
| Arh Traders Limited | Manchester | A rating |
| ARHAM & NOOR ENTERPRISES LIMITED t/a Londis | Edinburgh | A rating |
| ARHAM BROS LTD | London | A rating |
| ARHAM MANAGEMENT LTD | CHESHIRE | A rating |
| ARHZ IT Services Ltd | Brentford | A rating |
| ARI TRADERS LIMITED | MANCHESTER | A rating |
| ARIA CASH AND CARRY LTD | Rochdale | A rating |
| Aria Development Holdings Limited | London | A rating |
| Aria Fertility | London | A rating |
| ARIA GRACE LIMITED | London | A rating |
| Aria Healthcare Group Ltd | Colchester | A rating |
| ARIA INTELLIGENCE LTD | london | A rating |
| Aria Intelligent Solutions Limited | Oldham | A rating |
| Aria International Services Ltd | Suffolk | A rating |
| ARIA REMIT LIMITED | London | A rating |
| Aria Systems UK Limited | London | A rating |
| ARIA TECHNOLOGIES LIMITED | SURREY | A rating |
| ARIAN.S.C LIMITED | Leicester | A rating |
| Arian&Co Limited | Dreghorn | A rating |
| ARIANA AUTO CRASH LIMITED | London | A rating |
| Ariana Banqueting Hall | London | A rating |
| Ariana Star Ltd | Slough | A rating |
| ARIANA SUPERMARKET LIMITED | Nottingham | A rating |
| Arianne Piper Art Advisory Limited | London | A rating |
| ARIBS NOTTS LIMITED | Nottingham | A rating |
| ARIBS NOTTS LTD | NOTTINGHAM | A rating |
| Aridhia Informatics Ltd | Glasgow | A rating |
| Aridor Ltd | Ilford | A rating |
| Arie Capital Limited | London | A rating |
| Ariel Healthcare | Chard | A rating |
| ARIEL RE MANAGEMENT SERVICES LIMITED | London | A rating |
| Arieli & Company Limited | London | A rating |
| Arielle's Care Ltd | Altrincham | A rating |
| Ariens Company Ltd | Chalgrove | A rating |
| ARIES GLOBAL SOFTWARE HOLDING LIMITED | London | A rating |
| ARIES SHOPFRONT AND SHUTTER LTD | Dagenham | A rating |
| Arif Malida Ltd | London | A rating |
| ARIF TRADING LIMITED | OMAGH | A rating |
| Arigato Sushi and Ramen | DUNFERMLINE | A rating |
| ARIHANT FOODS LTD | Rugby | A rating |
| Arika Heavy Industries | Edinburgh | A rating |
| Arika Limited T/A Pharmco Pharmacy | Edgware | A rating |
| ARIMAS LTD | London | A rating |
| ARIMBS PROPERTIES LTD | Chatham | A rating |