| Japko Limited | Long Eaton | A rating |
| Japmann Ltd | Southampton | A rating |
| JAPN SOCIETY FOR THE PROMOTION OF SCIENCE | London | A rating |
| JAPZ IT Ltd | Chelmsford | A rating |
| Jaquar and Company Private Ltd | Leeds | A rating |
| JAR FRIENDS LTD | Romford | A rating |
| JAR SOFTWARES LONDON LTD | London | A rating |
| JARA FINANCE LTD | Birmingham | A rating |
| Jara Solutions Ltd | Reading | A rating |
| Jarden Murphy Ltd | Brackley | A rating |
| Jardin Des Violettes Ltd | Solihull | A rating |
| Jardine Care Limited | New Malden | A rating |
| Jardines(UK) Ltd | Milton Keynes | A rating |
| Jardox Limited | Sevenoaks | A rating |
| JARG Construction Ltd | Inverurie | A rating |
| JARMQ Ltd | Peterborough | A rating |
| JARNA & CO LTD | Stockbridge | A rating |
| Jarnail Singh Bal T/A Bal Bros Aggrirate | Southall | A rating |
| JAROKIRA LTD | LONDON | A rating |
| Jarrow Insights Ltd | London | A rating |
| JARSAM LIMITED T/A ROSEMARY BOOKKEEPING | LONDON | A rating |
| Jarsis UK Ltd | Altrincham | A rating |
| Jarvis Cosmetic Developments Ltd. | Hadleigh | A rating |
| Jarvis Insolvency Limited | Sale | A rating |
| Jaryah Limited | Oakham | A rating |
| JAS & KARAN UK LTD | Harrow | A rating |
| Jas Auto Panels & Accessories Limited | Leicester | A rating |
| Jas Business Agent Ltd. | Cheltenham | A rating |
| JAS EXPRESS LIMITED | Birmingham | A rating |
| Jas Formworks Limited | Rochenster | A rating |
| Jas Forwarding (UK) Limited | Feltham | A rating |
| JAS GLOBAL SOLUTIONS LIMITED | Cheltenham | A rating |
| JAS HAIR &BEAUTY LIMITED | Feltham | A rating |
| JAS Information Services Limited | London | A rating |
| JAS INNOVATIVE LIMITED | Stonehouse | A rating |
| Jas Live Digital Limited | Coventry | A rating |
| JAS MOBILE LTD | Wembley | A rating |
| JAS MUSICALS LIMITED | Southall | A rating |
| JAS NEWS LIMITED | London | A rating |
| JAS PHARMA LTD | Kendal | A rating |
| Jas Roofing Limited | Dagenham | A rating |
| JAS2 CONSTRUCTION LTD | Luton | A rating |
| JASCO Applied Sciences (UK) Ltd | Droxford | A rating |
| Jasdev Singh Thind | Birmingham | A rating |
| Jasfer Limited | Newton Abbot | A rating |
| Jash (BV) Limted T/As One Stop | Birmingham | A rating |
| JASH (WALSALL) 2 LIMITED T/A ONE STOP | Stoke-on-Trent | A rating |
| JASH HEALTHCARE LTD TRADING AS JASH PHYSIO | Harrow | A rating |
| Jash News Limited | London | A rating |
| JASH VENTURES LIMITED | London | A rating |
| Jashaan Limited | Leicester | A rating |
| JASHAN LIMITED | London | A rating |
| Jashim Metal LTD | London | A rating |
| Jashmia Convenience Ltd T/As Canterbury Wine Market | Canterbury | A rating |
| Jashn Restaurant | Swalwell | A rating |
| JASHU RETAIL LTD | Birmingham | A rating |
| Jashvi LTD | Neath | A rating |
| Jasi Company (UK) Limited | Plymouth | A rating |
| Jasjas1 Limited T/A Sanjha | Camberley | A rating |
| Jasmeet Transport LTD | Southall | A rating |
| Jasmin Oriental Restaurant | Southminster | A rating |
| Jasmin Powell Limited | Worthing | A rating |
| Jasmin Vardimon Company | Ashford | A rating |
| Jasmine Business Solutions Ltd | Milton Keynes | A rating |
| JASMINE CARE (SOUTH EAST) LIMITED | Cranbrook | A rating |
| Jasmine Dental Studios | London | A rating |
| JASMINE HEALTHCARE LIMITED | SLEAFORD | A rating |
| JASMINE JEWELLERY LTD | Bradford | A rating |
| Jasmine News Limited | London | A rating |
| JASMINE TAKEAWAY | West Midlands | A rating |
| Jasmine Thai Limited | Exeter | A rating |
| JASNAS LIMITED | Merseyside | A rating |
| Jasnav Street Food Limited | New Mills | A rating |
| Jasnav Street Food Limited TA Bukharaa (The Street Zaika) | New Mills | A rating |
| JASNOOR FOOD AND WINE LIMITED | Enfield | A rating |
| Jason Bruges Studio Ltd | London | A rating |
| Jason Hylton Court Nursing Home | Swadlincote | A rating |
| Jason Maguire Ltd t/a Ivy Lodge Farm | Gloucester | A rating |
| Jason Shop Fittings | Ormskirk | A rating |
| JASON VEG UK LIMITED | Croydon | A rating |
| Jasotharan Panchalingam T/A Bedfont Chicken and Pizza | Feltham | A rating |
| Jaspa (Finchley) Ltd T/A Domino's Pizza | Barnet | A rating |
| Jaspa (U K) Limited T/A Domino's Pizza | Hornchurch | A rating |
| Jaspa (UK) Limited | Essex | A rating |
| Jaspa Enfield Ltd T/A Fireaway Pizza | Kingswood | A rating |
| Jaspa Tea Group Limited | London | A rating |
| Jasper Associates Ltd | London | A rating |
| Jasper Education and Support Services Limited t/a Jess Care | Colchester | A rating |
| Jasper Ridge Services UK Limited | London | A rating |
| Jasper Vincent Solicitors | Southampton | A rating |
| Jaspers Health Ltd | Bournemouth | A rating |
| Jaspers pizza ltd | Halesowen | A rating |
| Jaspra Healthcare Ltd | London | A rating |
| Jass Builder | Coventry | A rating |
| JASS CATERINGH | WOLVERHAMPTON | A rating |
| Jassgold Ltd | Harlesden | A rating |
| JASVINDER SINGH BAINS T/A BAINS STORE | LOWESTOFT | A rating |
| Jaswant Singh Bhatt t/a The Boathouse | Shipley | A rating |
| JAT GLASS LTD | LONDON | A rating |
| JAT Stores Ltd | Newbridge | A rating |
| Jatania Property Limited | Bushey Heath | A rating |
| JATCO UK Ltd | Sunderland | A rating |
| JATE (UK) LIMITED | London | A rating |
| Jatha Logistics Ltd | Smethwick | A rating |
| JATHEESAN LTD | AYLESBURY | A rating |
| JATINDERJIT LIMITED | GLOUCESTER | A rating |
| JATO Dynamics Limited | Uxbridge | A rating |
| Jatt Badshah Ltd | London | A rating |
| JATTAN FOOD LTD T/A GURU INDIAN CUISINE | NEWRY | A rating |
| Jav's Hairdresser Limited | Middlesex | A rating |
| Java and Jazz Ltd | Forest Row | A rating |
| Java Investments Management PLC | London | A rating |
| Java Village (HX) Ltd | Sowerby Bridge | A rating |
| Java Whiskers | London | A rating |
| Javed & Co Accountants | Oldham | A rating |
| JAVED BC LTD | Glasgow | A rating |
| JAVED IQBAL T/A CHURCH GATE NEWS (SOLE TRADER) | Leicester | A rating |
| Javed Quality Halal Meat Ltd | Essex | A rating |
| JAVEDS OFF LICENCE LTD | ROCHDALE | A rating |
| JAVELIN GLOBAL COMMODITIES (UK) LTD | LONDON | A rating |
| JAVI HEALTHCARE LTD | London | A rating |
| Javlin Ltd | London | A rating |
| JAW Sustainability Limited | London | A rating |
| Jawa Foods LTD | London | A rating |
| Jawaby Services and Investment Limited | London | A rating |
| JAWHARA JEWELLERY LIMITED | Southall | A rating |
| Jax Media Limited | London | A rating |
| Jaxani Veg Food Ltd | Harrow | A rating |
| Jay & Sons Limited | Maesteg | A rating |
| Jay Childcare Matters Limited | Ipswich | A rating |
| Jay Devi Forest LTD T/A Ormonde House Hotel | Lyndhurst | A rating |
| Jay Ess Construction PVT Limited | West Drayton | A rating |
| JAY FOODS LIMITED | Hounslow | A rating |
| JAY GANESH & RIYA LIMITED | EDINBURGH | A rating |
| JAY GAYATRI LIMITED | London, | A rating |
| Jay Guru Krupa Ashish Limited | Northampton | A rating |
| Jay Hanuman CS Ltd | Edgware | A rating |
| Jay Jay UK Private Limited | Watford | A rating |
| JAY KAY CONSTRUCTION SERVICES LIMITED | Gravesend | A rating |
| Jay Maharaj Newsagent | New Malden | A rating |
| Jay Malaxmi Limited | Borehamwood | A rating |
| JAY MATAJI LIMITED T/A HILLFIELD NEWSAGENTS | MORDEN | A rating |
| JAY MILLERS CIRCUS | WOKING | A rating |
| Jay Osgerby Limited | London | A rating |
| Jay Retail Ltd | Upminster | A rating |
| Jay Rose Care Limited t/as Durnsford Lodge | Plymouth | A rating |
| JAY SHANTI NEIL LIMITED | PETERBOROUGH | A rating |
| Jay Stores | London | A rating |
| Jay Sweet Mart Ltd | Hounslow | A rating |
| Jay Two En Three Ltd T/a Gareth Rees Newsagents | Aberdare | A rating |
| Jay Zee Barbers Ltd | Rainham | A rating |
| Jay's BBQ BAR LTD | Glasgow | A rating |
| JAY'S DESSERTS LTD | Leeds | A rating |
| JAY&J LTD | Telford | A rating |
| Jaya Shiva Ltd | Torquay | A rating |
| Jaya Shree Krishna Charitable Trust | Harrow | A rating |
| JAYA.S LIMITED | Birmingham | A rating |
| JAYA'S G D LTD T/A JAYAS GERMAN DONNER & DESSERTS | Ardrossan | A rating |
| Jayachoice Ltd t/a Putney Pharmacy | London | A rating |
| Jayaharan Medical Services LTD | Lytham St. Annes | A rating |
| JAYAMANNA LIMITED | Bristol | A rating |
| JAYAMBER LIMITED | Hemel Hempstead | A rating |
| Jayan Hospitality Ltd | London | A rating |
| JAYANDGEE LIMITED | London | A rating |
| JAYASHREE MANAGEMENT PVT LTD | ROCHESTER | A rating |
| JAYASHRI PONNUSAMI T/A HEATH SIDE STORES | PETERSFIELD | A rating |
| Jaycee Subway Limited | Portsmouth | A rating |
| Jaydee Foods Ltd | Chorlton Cum Hardy | A rating |
| Jayesh Florist Ltd | London | A rating |
| Jayesh Patel and Rupa Patel T/A Camberwell Dental Care | London | A rating |
| Jayex Limited | Berkhamsted | A rating |
| Jaykishan Lostock Hall Limited | Lostock Hall | A rating |
| JAYKISHAN PRESTON LIMITED | PRESTON | A rating |
| JAYOVAL LIMITED | Coventry | A rating |
| Jays Budgens | London | A rating |
| Jays Convenience Store | Birmingham | A rating |
| Jays Fruit & Veg Ltd | London | A rating |
| Jays Homecare Ltd | Enfield | A rating |
| Jays London Limited | London | A rating |
| Jays News | Bedford | A rating |
| Jays News Off Licence Limited | Ashton-Under-Lyne | A rating |
| Jays Pharmacy | Egham | A rating |
| Jays Plumbing, Heating & Electrical Ltd | Stockton On Tees | A rating |
| Jays Travel | Smethwick | A rating |
| Jays UK Ltd | Gt Yarmouth | A rating |
| Jaysam Contractors Limited | Middlesex | A rating |
| Jaysh Care Services Limited | Liss | A rating |
| Jaysons Pharmacy Ltd | Nottingham | A rating |
| JAYTY LIMITED T/A INSPIRE PHARMACY | IBSTOCK | A rating |
| Jaywick Dental Surgery | Clacton-on-Sea | A rating |
| Jaywing UK Limited | Leeds | A rating |
| Jayyogiraj T/A Morrisons Daily | Burnham Village | A rating |
| Jaz Care Ltd | Lurgan | A rating |
| JAZ RETAIL LTD t/a Day Today | Kilmarnock | A rating |
| JAZ TECHNOLOGIES LTD | Leeds | A rating |
| JAZBA ENTERTAINMENT LTD. | BIRMINGHAM | A rating |
| JAZDA SUPERMARKET LTD T/A PREMIER | Edinburgh | A rating |
| JAZZ CONSTRUCTION BEDFORD LTD | Bedford | A rating |
| Jazz North | Brighouse | A rating |
| Jazz Pharmaceuticals UK Limited | London | A rating |