| James Ewart Racing LTD | Westerkirk | A rating |
| James Family Care Ltd | Chessington | A rating |
| James Ferguson Racing Ltd | Newmarket | A rating |
| James Finlay Limited | London | A rating |
| James Fisher and Sons plc | Barrow in Furness | A rating |
| James Fisher Asset Information Services | Aberdeen | A rating |
| James Frederick Cooper, Mary Violet Cooper, Jacqueline Marie Riddett & John Frederick Cooper t/a Willows Nursing & Residential Home | Leicester | A rating |
| JAMES FREW LTD | STEVENSTON | A rating |
| James Glancy Design Limited | London | A rating |
| James Gray Recruitment Ltd | Glasgow | A rating |
| James H Black | Lisbellaw | A rating |
| James Hall & Co Ltd | Preston | A rating |
| James Harper Polo Ltd | Keyshott | A rating |
| James Hudson (Builders) Limited | Belper | A rating |
| James Immigration Solutions Ltd | London | A rating |
| James Jones & Sons Ltd | Larbert | A rating |
| James Khan | Cardiff | A rating |
| JAMES KIDS HOME LIMITED | BROMLEY | A rating |
| James Lee Plumbing Solutions Ltd | Worcester | A rating |
| JAMES LEWIS LTD | HAMPTON | A rating |
| James Madison University & JMU Overseas Programs Ltd | London | A rating |
| James Mae Industries Limited | Bradford | A rating |
| James McMiken & Co | Newton Stewart | A rating |
| JAMES NAIL LIMITED T/a J & Co Nail Bar | Surrey | A rating |
| James Paget University Hospitals NHS Foundation Trust | Great Yarmouth | A rating |
| James Park Associates International Limited | Hackney | A rating |
| James Park Associates Ltd (JPA Design) | Yorkshire | A rating |
| James Patterson Architects Ltd. | Brighton | A rating |
| James Pegg Dentistry | York | A rating |
| James Pendleton (Clapham Common) Ltd | London | A rating |
| james reckitt properties limited | Bradford | A rating |
| James Richard Marsden t/a Gigglepin 4x4 | Hildenborough | A rating |
| James Robinson Fibres Ltd | Bradford | A rating |
| James Robinson Speciality Ingredients Ltd | Huddersfield | A rating |
| James Sanderson LTD T/AS Caremark Bromley & Lewisham | Bromley | A rating |
| James Specialist Veterinary Cardiology | Cranage | A rating |
| James Steel LTD | Borehamwood | A rating |
| James Steel Productions LTD | London | A rating |
| James Stores | London | A rating |
| James Walker & Co Ltd | Cockermouth | A rating |
| James Walker Sealing Products & Services | Woking | A rating |
| James Walker UK Ltd | Crewe | A rating |
| James Wallace (Dumfries) Limited | DUMFRIES | A rating |
| James Wellesley Ltd | Gillingham | A rating |
| James White Drinks LTD | Ashbocking | A rating |
| James White Engineering Group Limited | Reading | A rating |
| James Wigg Group Practice | LONDON | A rating |
| James Wilkie t/a The Maasai Company | DOLLAR | A rating |
| James-Lee Consultancy Ltd | London | A rating |
| James' Place | London | A rating |
| James&Sons Global Ltd | Stretford | A rating |
| Jameson Legal Limited | LONDON | A rating |
| Jamestown Europe GmbH UK Branch | London | A rating |
| JAMESY7 LTD | Coventry | A rating |
| JAMF LTD | London | A rating |
| Jamia Al Furqaan | Sheffield | A rating |
| Jamia Al-Karam | Retford | A rating |
| JAMIA DARUS SUNNAH LONDON | LONDON | A rating |
| Jamia Hanfia Ghosia Mosque And Princess Street Resource Centre | Burton on Trent | A rating |
| Jamia Hanfia Rezvia Mosque | Newport | A rating |
| Jamia Islamia (Islamic & Community Centre) Trust | Glasgow | A rating |
| Jamia Islamia Ghousia Trust | Luton | A rating |
| JAMIA LTD | LONDON | A rating |
| Jamia Masjid & Madrassa Faiz Ul Quran Ghousia | Birmingham | A rating |
| Jamia Masjid Kanzul Iman | Heckmondwike | A rating |
| Jamia Masjid Rizvia Brierley Hill | Brierley Hill | A rating |
| Jamia Mosque Anwar-Ul-Uloom Trust | Smethwick | A rating |
| Jamia Mosque Gulzar-e-Habib and Education Centre | Sheffield | A rating |
| Jamia Muhammadiyah | Halifax | A rating |
| Jamiat Ahl-e-Hadith Nottingham (Masjid Umar) | Nottingham | A rating |
| Jamiat Ittihad-Ul-Muslimin t/a Glasgow Central Mosque | Glasgow, | A rating |
| JAMIAT-UL-MUSLEMEEN QUWAT-UL-ISLAM MASJED | Crawley | A rating |
| JAMIATUL-ILM WAL-HUDA UK | BLACKBURN | A rating |
| Jamie Fobert Architects | London | A rating |
| Jamie Wilson Productions Ltd | Sutton | A rating |
| Jamieson & Carry | Aberdeen | A rating |
| Jamieson Corporate Finance LLP | London | A rating |
| Jamieson Management (Scotland) Ltd | Invergordon | A rating |
| Jamil & Munir Akhtar T/A J&M Halal Mini Market | Bradford | A rating |
| JAMIL MANGAL TRAVEL & TOURS LIMITED | Edgware | A rating |
| JAMIL'S BARBER LTD | London | A rating |
| JamJar Management LLP | London | A rating |
| JAMM IT Limited | London | A rating |
| Jamm Visual Limited | London | A rating |
| JAMMA INTERNATIONAL | Pirbright | A rating |
| JAMMU & CO. LTD T/A CROWN CUT BARBERS | GLASGOW | A rating |
| JAMON RESTAURANTS LIMITED | London | A rating |
| JAMORES LIMITED | Erith | A rating |
| JAMS (M/CR) LIMITED | Cheshire | A rating |
| JAMS Development Pvt Ltd | Reading | A rating |
| JAMUNA (N.I.) LIMITED t/a Bangla | Bangor | A rating |
| Jamuna Stores LTD | Consett | A rating |
| JAMUNA TRADING LIMITED | London | A rating |
| Jamworks Platform Limited | Farnham | A rating |
| Jamyang Buddhist Centre | London | A rating |
| Jamyang Buddhist Centre Leeds | Leeds | A rating |
| Jan & Sach hotels Ltd trading as Villare Leicester City Centre Hotel | Leicester | A rating |
| Jan Capital Ltd | Preston | A rating |
| Jan De Nul UK Limited | Ascot | A rating |
| Jan London Trade Limited | Birmingham | A rating |
| Jan London Trade Ltd | Birmingham | A rating |
| Jan Preschool and Nursery | London | A rating |
| Jan Towers Solicitors Ltd | London | A rating |
| JAN UK TRADERS LIMITED | London | A rating |
| JAN-PHARMA LTD T/A CHURCHFIELD PHARMACY | LONDON | A rating |
| Jan's Global Limited T/A DZRT | London | A rating |
| Jana Retail Limited | Cornwall | A rating |
| Janaan Ltd, trading as Chargos | High Wycombe | A rating |
| Janak Properties Limited | Harrow | A rating |
| JANAKAN PARANIRUPASINGAM T/A BOOZE EXTRA | Bootle | A rating |
| JANAN (STRATFORD) LIMITED | Birmingham | A rating |
| Janan Limited | Bradford | A rating |
| Janan Online Limited | Bradford | A rating |
| Janda Cafes Ltd | London | A rating |
| JANDOR TRANSPORT LTD | Brierley Hill | A rating |
| JandP Group | Deeside | A rating |
| Jane Allison Equestrian LTD | Swindon | A rating |
| Jane Makeup Ltd | Canvey Island | A rating |
| Jane Plan | London | A rating |
| Jane Street Europe Limited | London | A rating |
| Jane Wei London Limited | London | A rating |
| Jane Williams Racing | South Molton | A rating |
| Jane's Group UK Limited | Croydon | A rating |
| Janes Care Homes Limited | Dunstable | A rating |
| Janessa Retail Limited | Northolt | A rating |
| JANGI HOSPITALITY LTD | Liverpool | A rating |
| JANI BUILDING SERVICES LTD | Morden | A rating |
| JANIE LIGHTFOOT TEXTILES LLP | LONDON | A rating |
| JANIIVEC LTD | Colchester | A rating |
| Janikin Rooke Contracts Ltd | London | A rating |
| JANISHA LIMITED T/A ROYAL BAHAAR | STOKE ON TRENT | A rating |
| Janith Homes Ltd | Walcott | A rating |
| Janitorial Essentials Ltd | Birmingham | A rating |
| Jankan Enterprise Limited | Harold Wood | A rating |
| Janklow and Nesbit (UK) Limited | London | A rating |
| JANNA LEBANESE RESTAURANT LTD | Cheadle | A rating |
| JANNAH CUSIN LTD | Brierley Hill | A rating |
| Jannah Express Limited | London | A rating |
| Jannah Properties (U.K) Ltd | London | A rating |
| JANNAT BELFAST LIMITED | DUNADNALD | A rating |
| JANNAT FOOD STORES LTD | Peterborough | A rating |
| JANNAT LARGS LIMITED t/a Kohinoor | Largs | A rating |
| JANNAT STORES INN LIMITED | MANCHESTER | A rating |
| Jannet Security Services Ltd | London | A rating |
| Jannock Limited | Leicester | A rating |
| JANO S & Q FRESH FISH LIMITED | HATFIELD | A rating |
| Janome UK Ltd | Stockport | A rating |
| JANOON LTD | IRVINE | A rating |
| Janousek and Stampfli Boats Ltd T/A Janousek and Stampfli Racing Boats | West Byfleet | A rating |
| Jans Services Limited | Rainham | A rating |
| Jansi Properties Ltd | London | A rating |
| Janssen-Cilag Ltd | High Wycombe | A rating |
| Jant Property Holdings Ltd | London | A rating |
| JANTA FASHIONS LTD | Gravesend | A rating |
| Jants Capital Limited | Pinner | A rating |
| January Group Ltd | London | A rating |
| Janus Conservation Limited | Aylesbury | A rating |
| JANUS ET CIE U.K. LIMITED | London | A rating |
| JANUS HENDERSON ADMINISTRATION UK LIMITED | LONDON | A rating |
| Janus International Europe Limited | Twickenham | A rating |
| JANUSH FOOD & WINE LTD | Biggleswade | A rating |
| Janushka Limited T/A The Tuck Box | Southend on Sea, Essex | A rating |
| JANYALVI TRADE LIMITED | West Bromwich | A rating |
| Jaomar Ltd | Borehamwood | A rating |
| Jaoyeh Trading Ltd | Swansea | A rating |
| JAP CAR BREAKERS LIMITED | Birmingham | A rating |
| JAP CAR FINDER LIMITED | BRADFORD | A rating |
| JAP PERFORMANCE PARTS LIMITED | Crawley | A rating |
| Jap Roofing Contractors Limited | Feltham | A rating |
| Jap Service Parts Limited | Slough | A rating |
| JAPAFLEX LTD | MIDDLESBROUGH | A rating |
| Japan Agency for Medical Research and Development | London | A rating |
| Japan Airlines Co. Ltd | London | A rating |
| JAPAN AT UK LIMITED | London | A rating |
| Japan Auto Sales Ltd | Birmingham | A rating |
| JAPAN AUTOPARTS LTD | Bristol | A rating |
| Japan Bank for International Cooperation | London | A rating |
| Japan Cars UK Ltd | Middlesex | A rating |
| Japan Centre Group Ltd | Park Royal | A rating |
| Japan Centre Retail Ltd | Wembley | A rating |
| JAPAN CRAFT LTD | LONDON | A rating |
| Japan Derby Ltd | Derby | A rating |
| Japan England Insurance Brokers Ltd | London | A rating |
| Japan Exchange Group, Inc. | London | A rating |
| Japan Food Express Limited | Croydon | A rating |
| Japan Foundation, London | London | A rating |
| Japan Glasgow Motors Ltd | Wishaw | A rating |
| JAPAN GREEN MEDICAL CENTRE LTD | LONDON | A rating |
| Japan Journals Limited | London | A rating |
| Japan National Tourism Organization | London | A rating |
| JAPAN SALES & LETTINGS AGENCY LTD | London | A rating |
| JAPAN SERVICES RENT LIMITED | London | A rating |
| Japan Society for the Promotion of Science London Office | London | A rating |
| Japanese Christian Fellowship | London | A rating |
| Japanese Financial Solutions Limited | London | A rating |
| Japanese Imported Vehicles Ltd | Birmingham | A rating |
| Japanese kitchen SORA -Cafe & Izakaya Tapas- | Nottingham | A rating |
| Japcartrade LTD | LONDON | A rating |
| Japes Pizza LTD | London | A rating |
| JAPJI SAI LTD | West Midlands | A rating |