| J.D Power UK Limited | Swansea | A rating |
| J.E.B. Technologies Limited | Suffolk | A rating |
| J.E.M. Care Limited | Manchester | A rating |
| J.F. & H. Dowds Limited | Ballymena | A rating |
| J.F.M. Electrical Limited | Bellshill | A rating |
| J.G. Porter Contractors Ltd | Angus | A rating |
| J.Horner Holdings Ltd | Claverdon | A rating |
| J.J. Fox (St. James's) Limited | London | A rating |
| J.J. Malbert Ltd | South Scarle | A rating |
| J.J.JOINERY(UK) LIMITED T/A MOBIFORM | Uckfield | A rating |
| J.J.T.N LTD T/A The Newsagent and Off Licence | NORWICH | A rating |
| J.K. Dental Surgeries Holding Co LTD | Benfleet | A rating |
| J.K. fashions (Derby Ltd) T/A Premier Bembridge Convenience Store | Derby | A rating |
| J.K.S (Magheramorne Estate) Ltd | Larne | A rating |
| J.LEAGUE EUROPE | Maidenhead | A rating |
| J.M.K. CARE SERVICES LIMITED | EASTBOURNE | A rating |
| J.M.KAMAU LIMITED | NORTHAMPTON | A rating |
| J.N.B. ELECTRICAL ENGINEERS LTD | Ilford | A rating |
| J.N.K. MOTORS LTD. T/A JNK MOTORS | Stanmore | A rating |
| J.O.T. Limited | Northwich | A rating |
| J.R. Beim | Cirencester | A rating |
| J.R.STONE LTD | Northolt | A rating |
| J.S AESTHETICS STUDIO LIMITED | London | A rating |
| J.S. Held UK Limited | London | A rating |
| J.S.Bloor (Services) Limited | Swadlincote | A rating |
| J.S.H ENTERPRISES LIMITED T/As Rocky Express | LONDON | A rating |
| J.S.O Fire Safety Consultants Ltd | Sheffield | A rating |
| J.V. Growth Limited | Oxford | A rating |
| J.V.G (LONDON) LTD | Walthamstow | A rating |
| J.W.SHOPFITTING LTD | Leicester | A rating |
| J'adore Models | Manchester | A rating |
| J'S Business Consulting Ltd | London | A rating |
| J&A LOGISTICS LTD | Harlow | A rating |
| J&A Supplies Ltd | Halifax | A rating |
| J&B HONOR GROUP LTD | Uxbridge | A rating |
| J&B Hopkins | Fareham | A rating |
| J&B TAPE AND JOINTERS LTD | LONDON | A rating |
| J&C Healthcare Ltd | PLYMOUTH | A rating |
| J&C Soul CIC | London | A rating |
| J&D Pierce Contracts Limited | Glengarnock | A rating |
| J&D UK immigration Services LTD. | OLDBURY | A rating |
| J&D Wilkie Ltd | Kirriemuir | A rating |
| J&E Group Ltd | Glasgow | A rating |
| J&E Shepherd | Edinburgh | A rating |
| J&F FOODS LTD | Lowestoft | A rating |
| J&G Meakin Cricket Club | Stoke-on-Trent | A rating |
| J&G TILING LTD | London | A rating |
| J&I Cleaning Services Ltd | Eastcote | A rating |
| J&I ELECTRONICS LIMITED | London | A rating |
| J&I GROUP LTD | London | A rating |
| J&J Electrics Limited | Wellingborough | A rating |
| J&J FORECOURT LTD | Pontefract | A rating |
| J&j Healthcare Professionals Ltd | CHATHAM | A rating |
| J&J OMM MURUGA LTD | Romsey | A rating |
| J&J One Limited | London | A rating |
| J&J Service Retail Limited | Northolt | A rating |
| J&J Therapy | New Malden | A rating |
| J&K Coaches Ltd | Magherafelt | A rating |
| J&K FOOD SERVICES LTD | Sandhurst | A rating |
| J&K Global Food Ltd | Romford | A rating |
| J&K Services Limited T/A L & D News & Post Office | Luton | A rating |
| J&L Gibbons LLP | London | A rating |
| J&L Logistics Ltd | Radcliffe | A rating |
| J&M Bargains Limited | London | A rating |
| J&MHEALTHCARE LTD | Peterborough | A rating |
| J&N Family Choice Ltd | Bedford | A rating |
| J&NT LTD trades as Shree Shringar | Leicester | A rating |
| J&O SERVICES LTD T/a ESSO | LONDON | A rating |
| J&P ACCOUNTANTS LIMITED | Manchester | A rating |
| J&P Civil Engineering Ltd | Bury | A rating |
| J&P ENGINEERING SERVICES LTD | HAWARDEN | A rating |
| J&P EXOTICS LIMITED | LONDON | A rating |
| J&P Leisure Limited | Derry | A rating |
| J&P Physio & Talking Therapy | WIRRAL | A rating |
| J&P PUBS (NI) LTD | Dromore | A rating |
| J&R FOURCOURT LTD | LEEDS | A rating |
| J&R TRADERS LTD | London | A rating |
| J&S Food Services Limited T/A Chicago Pizza | Worcester | A rating |
| J&S Innovatives Ltd trading as J and S Caterers | Birmingham | A rating |
| J&S INTERNATIONAL LIMITED | Romford | A rating |
| J&S Kitchen LTD | London | A rating |
| J&S McKee Ltd | PORTGLENONE | A rating |
| J&S Mini Market Limited | Chatham | A rating |
| J&S NK Limited | Wallsend | A rating |
| J&S PLUMBING & HEATING LIMITED | Essex | A rating |
| J&S Subsea Ltd | Kintore | A rating |
| J&T (UK) RETAIL LIMITED T/A LONDIS | LUTON | A rating |
| J&T EXPRESS UK LTD | Lutterworth | A rating |
| J&T GOODS LTD | London | A rating |
| J&T Recruitment Ltd | London | A rating |
| J&T Textiles & Hosiery Limited | Salford | A rating |
| J&W Fast Food Ltd | Southampton | A rating |
| J&W Jewellery Limited | Solihull | A rating |
| J&Z CATERING SERVICES LIMITED | LONDON | A rating |
| J&Z Joinery Ltd | Manchester | A rating |
| J1 TRANSPORT LIMITED | Coalville | A rating |
| J1DDX LTD | Leicester | A rating |
| J2 Design Marketing Digital Ltd | Bushey | A rating |
| J2 Global UK Ltd. | London | A rating |
| J2 Software Limited | Williton | A rating |
| J2-D2 Ltd | London | A rating |
| J24 RESOURCING LIMITED | DERBY | A rating |
| J2D Consulting Ltd | London | A rating |
| J2JK UK Limited T/As Best Supermarket | Hertfordshire | A rating |
| J2L INTEGRATED CARE AND SUPPORT LTD | MILTON KEYNES | A rating |
| J2SM Limited | Brighton | A rating |
| J2W FOOD LTD | Bristol | A rating |
| J5HOLLAND LTD | Manchester | A rating |
| JA & co London limited | London | A rating |
| JA AND MASSIE LIMITED | London | A rating |
| Ja Bee Ltd T/A Ja Bee Bubble Tea | London | A rating |
| JA Brooks Mechanical Services Ltd | London | A rating |
| JA CHICKEN HUT LTD | Croydon | A rating |
| JA INV 1 Limited t/a Jaipur Spice York | York | A rating |
| JA Investments One Limited TA The Jharna | Belfast | A rating |
| JA Traders Ltd | Billericay | A rating |
| Jaahnu Solutions | AMERSHAM | A rating |
| Jaahnu Solutions Limited | Amersham | A rating |
| JAAM AUTOMATION LTD | London | A rating |
| JAAM Restaurants Ltd | Swindon | A rating |
| Jaan London Ltd | Southall | A rating |
| JAAN Services | Corby | A rating |
| Jaan's Express Ltd | Mitcham | A rating |
| JAANU CAFE RESTAURANT LTD | LEICESTER | A rating |
| JAAT SERVICE STATION LIMITED | Shaftesbury | A rating |
| JAB Partners (UK) Limited | London | A rating |
| Jaba Construct Limited | Milton keynes | A rating |
| Jabil Circuit Limited | Livingston | A rating |
| Jabru Ltd T/A Cubana | Sheffield | A rating |
| Jac Cars Limited. | Ilford | A rating |
| JAC CARS LTD | Romford | A rating |
| JAC ECOM LTD | CRAWLEY | A rating |
| JAC Recruitment (UK) Limited | London | A rating |
| JAC STORE LTD T/A ALL IN ONE | LONDON | A rating |
| Jacada Europe Ltd | London | A rating |
| JACADI UK LIMITED | LONDON | A rating |
| Jacaranda Convenience Ltd | Shirebrook | A rating |
| Jacaranda Worldwide Limited | Manchester | A rating |
| JACHUBSERVICES LTD | high wycombe | A rating |
| Jack & Grace | Peterborough | A rating |
| JACK & KO GROUP LTD | London | A rating |
| Jack and Beyond Ltd | London | A rating |
| Jack and Jackson Accountancy Limited | High Wycombe | A rating |
| Jack and Jills Day Nursery | Hemel Hempstead | A rating |
| Jack Bidco Ltd | Croydon | A rating |
| Jack Brand Ltd | Ipswich | A rating |
| Jack Bryant Productions Ltd T/A BRYANT | London | A rating |
| JACK BUILDERS LTD | Mitcham | A rating |
| Jack Bygraves Ltd | Biggleswade | A rating |
| Jack Channon Racing | Newbury | A rating |
| Jack Fishing LLP | Fraserburgh | A rating |
| Jack Hunt School | PETERBOROUGH | A rating |
| Jack Hyde | West End | A rating |
| Jack in the Bag Limited | Gateshead | A rating |
| Jack Morton Worldwide | London | A rating |
| Jack Morton Worldwide Limited | London | A rating |
| Jack Nadel International Ltd | London | A rating |
| Jack Ross Limited | Salford | A rating |
| Jack Russell Inn Limited | Andover | A rating |
| Jack Sears House | Paignton | A rating |
| Jack Simpson House Limited | exeter | A rating |
| JACK TANDOORI LTD T/A BANGOR TANDOORI | Bangor | A rating |
| Jack's | Rainhill | A rating |
| Jack's Creek UK Limited | London | A rating |
| JackandEthan ltd | London | A rating |
| Jackie chards childcare | wokingham | A rating |
| Jackmans Lodge Ltd | Woking | A rating |
| Jackos Fish and Chips | Rochford | A rating |
| Jacks Cafe & Bar Ltd | Wolverhampton | A rating |
| Jacks Gelato Limited | Cambridge | A rating |
| JACKS RETAIL STORES LTD | COVENTRY | A rating |
| Jacks Veterinary Ltd | Swansea | A rating |
| Jackson and Frank Ltd | London | A rating |
| JACKSON CALIFORNIA LAKE LTD | WOKINGHAM | A rating |
| Jackson Civil Engineering Group Ltd | Ipswich | A rating |
| Jackson Daly | London | A rating |
| Jackson ImmunoResearch Europe | Ely | A rating |
| Jackson Ltd | Newton Abbot | A rating |
| Jackson Stapleton Accountants (Lincoln) Limited | Lincoln | A rating |
| Jacksons | Hull | A rating |
| JACKSONS BUTCHERS AND BAKERY | BALLYCLARE | A rating |
| Jacksons Leisure Supplies Ltd | Wirral | A rating |
| Jacksons News and Off-licence | Loughborough | A rating |
| Jacksons Pharma Ltd | Halesowen | A rating |
| JACKSONS SERVICES LTD T/A JACKSONS GARAGE | BIRMINGHAM | A rating |
| JACOB AND JOE LTD | LEICESTER | A rating |
| Jacob White (Packaging) Ltd | DARTFORD | A rating |
| Jacobi Carbons Limited | Leigh | A rating |
| Jacobi EMEA Limited | London | A rating |
| Jacobs and Turner LTD | Glasgow | A rating |
| Jacobs Cake World & Taste Buds Limited | HOUNSLOW | A rating |
| Jacobs Capital U.K Limited | London | A rating |
| Jacobs Douwe Egberts GB Limited | Maidenhead | A rating |
| Jacobs Futura Trustee Limited | London | A rating |
| Jacobs Holding LLP | London | A rating |
| Jacobs Londis | Manchester | A rating |
| Jacobs Properties Sales and Lettings Ltd | Basingstoke | A rating |
| Jacobs UK Ltd | Wokingham | A rating |
| JACQUARD GROUP LIMITED | London | A rating |
| Jacqueline & Edward Ltd | Wetherby | A rating |