| M-Bitz Ltd | Watford | A rating |
| M-Bitz Ltd | Bromley | A rating |
| M-Brace Orthodontics Limited | Edinburgh | A rating |
| M-dens Ltd | Lossiemouth | A rating |
| M-E Engineers | London | A rating |
| m-hance Ltd | Stockport | A rating |
| M-Kopa UK Limited | London | A rating |
| M-MART LIMITED | Watford | A rating |
| M-MGMT Limited | Westcott | A rating |
| M-POWER CREATIONS LTD | London | A rating |
| M-R Solicitors LLP | London | A rating |
| M-Solv Ltd | Witney | A rating |
| M-Sport Limited | Cockermouth | A rating |
| M-Tec Engineering Projects Ltd | Coventry | A rating |
| M-Verth Limited | Paisley | A rating |
| M-XR Limited | London | A rating |
| M. A. ORIENTAL FOODS LIMITED | Watford | A rating |
| M. A. Wholesale Limited | Manchester | A rating |
| M. AHBAB AND CO LIMITED T/a SHA GMT | London | A rating |
| M. BALUCH LTD | London | A rating |
| M. BROS SUPERMARKET LIMITED T/A AMBROSIA | London | A rating |
| M. EPOCH LIMITED | Harrogate | A rating |
| M. G. Herbal Treatments Ltd | Ilford | A rating |
| M. Hussain (Chemists) Limited | Coventry | A rating |
| M. K. KITCHEN AND BEDROOMS LTD | Bury | A rating |
| M. Keys Farms Ltd | Fivemiletown | A rating |
| M. Kiss t/a Orchard Lodge | Liverpool | A rating |
| M. Lange Ltd t/a Salut! | London | A rating |
| M. M. YOUNES PROPERTIES LTD | NEWCASTLE UPON TYNE | A rating |
| M. Najib & Sons Limited | Foston | A rating |
| M. O'Brien (Plant Hire) Ltd | St Albans | A rating |
| M. POULTRY SERVICES (NI) LIMITED | Armagh | A rating |
| M. S. George Limited | RICHMOND | A rating |
| M.A. BEGUM ENTERPRISE LTD T/A The Pavilion | Bolton | A rating |
| M.A.C. DEVELOPMENTS & CONSTRUCTION LIMITED | Nuneaton | A rating |
| M.A.C.K RENEWABLES LTD | Cardiff | A rating |
| M.A.C.SOLUTIONS (U.K.) LTD | Redditch | A rating |
| M.A.C.T Limited | London | A rating |
| M.A.D Creative Solutions Ltd T/A La Dragon | Kilmarnock | A rating |
| M.B MOBILES LTD | Birkenhead | A rating |
| M.B. KEMP LLP | London | A rating |
| M.C. Dean, Inc | London | A rating |
| M.C. Overalls Ltd | London | A rating |
| M.C. STENNETT & SONS LIMITED | Bury St. Edmunds | A rating |
| M.C.A. Dom Care LTD T/A Bridgewater Home Care Watford | Watford (Hertfordshire) | A rating |
| M.C.L. Transport Limited | Bury St. Edmunds | A rating |
| M.E.E Limited | London | A rating |
| M.F. Certus D.O.O. | Stoke On Trent | A rating |
| M.G Hair & Body Treatments Ltd | Seven Kings | A rating |
| M.G. Electric (Colchester) Ltd | Colchester | A rating |
| M.G.Webber West Country Grown Ltd | Honiton | A rating |
| M.i. Media Services ltd | London | A rating |
| M.K Trading Group Limited | London | A rating |
| M.Keys Transport | CLOGHER | A rating |
| M.L. Health Foods Limited T/A Chinese Little Princess | London | A rating |
| M.L.PROFESSIONALS LIMITED | London | A rating |
| M.M.R. Care LTD | Accrington | A rating |
| M.N & SONS ENTERPRISES LTD | Chatham | A rating |
| M.N & SONS ENTERPRISES LTD T/A Muffin Break | Chatham | A rating |
| M.N.O ROOFING SERVICES LIMITED | London | A rating |
| M.O. Tourist Co., Ltd. | Burnaston | A rating |
| M.P. Brothers Limited | London | A rating |
| M.R. MOTOR SERVICES LIMITED | Romford | A rating |
| M.S SHAH LTD | London | A rating |
| M.S.GILL & SONS LTD T/A GILL CHEMISTS | SOUTHALL | A rating |
| M.V Deeside BCK595 Ltd | Buckie | A rating |
| M'CUBE INVESTMENTS LIMITED | DARTFORD | A rating |
| M'kadesh healthcare Ltd | Nottingham | A rating |
| M'S Creamy Gelato Ltd | Ealing | A rating |
| M'S LONDON CONVEYANCING LTD | Salford | A rating |
| M&5S Electrical Services Ltd | Suffolk | A rating |
| M&A BUILDING SERVICES LTD | Westerham | A rating |
| M&A CARPET AND FURNITURE LTD | Luton | A rating |
| M&A CONSTRUCTION & DEVELOPMENT LIMITED | Dudley | A rating |
| M&A Food Distribution Ltd | Birkenhead | A rating |
| M&A FORECOURTS LTD | Bradford | A rating |
| M&A Healthcare Group Ltd | London | A rating |
| M&A IT SERVICES LTD | LIVINGSTON | A rating |
| M&A Motors Northants Ltd | Northampton | A rating |
| M&A Sakhi Construction Ltd | Hayes | A rating |
| M&A SCOT LTD t/a Kings Candy & Vapes | KILMARNOCK | A rating |
| M&A STEEL FIXING LIMITED | Barking | A rating |
| M&A Stores Ltd | Northolt | A rating |
| M&A STYLES LTD | Oldham | A rating |
| M&A TRADAX LIMITED | Ashton-Under-Lyne | A rating |
| M&A Vegetable Ltd. | Southall | A rating |
| M&C Care Limited t/a Rowan House Care Home | Saltash | A rating |
| M&C Commerce Limited | London | A rating |
| M&C Fix Ltd | Nottingham | A rating |
| M&C Home Support Ltd | Bedford, | A rating |
| M&C Saatchi PLC | London | A rating |
| M&D CLEANING CONSULTANCY LTD | London | A rating |
| M&D Green | Glasgow | A rating |
| M&D Healthcare | Deal | A rating |
| M&D Residential Ltd | Stockport | A rating |
| M&D Tandon Catering Ltd | Moray | A rating |
| M&E Coffee Ltd | SOLIHULL | A rating |
| M&E Design and Build Ltd | Redhill | A rating |
| M&E Mills Ltd | London | A rating |
| M&E PLANNING SOLUTIONS LTD | MANCHESTER | A rating |
| M&F GLOBAL UK LTD | Hayes | A rating |
| M&F Health Communications Ltd | London | A rating |
| M&G MOTORS LTD | Stoke-On-Trent | A rating |
| M&H Civils Ltd | Grays | A rating |
| M&H COFFEE LTD | Ashford | A rating |
| M&H SONS LTD | Ilford | A rating |
| M&I CATERING SERVICES LTD | KETTERING | A rating |
| M&I DAR LTD | EVESHAM | A rating |
| M&I Materials Ltd | Trafford Park | A rating |
| M&J Beds Ltd | Dewsbury | A rating |
| M&J Crutchfield T/A MC Controls | Eastleigh | A rating |
| M&J Group Constructions and Roofing | Bedfordshire | A rating |
| M&K ACCOUNTANTS (UK) LIMITED | LONDON | A rating |
| M&K Aesthetics Limited | London | A rating |
| M&K Freight Limited | Wolverhampton | A rating |
| M&K Solicitors | LUTON | A rating |
| M&K SUPERMARKET (SWEETS) LIMITED | LONDON | A rating |
| M&K Wilson Limited | Grassington | A rating |
| M&M AGILE SOLUTIONS LIMITED | Bristol | A rating |
| M&M Bowness Ltd | Ulverston | A rating |
| M&M Brand Ltd | South Croydon | A rating |
| M&M BUILDING SERVICES LTD | Slough | A rating |
| M&M Business Accounting Ltd | Watford | A rating |
| M&M CAREHOMES | Hull | A rating |
| M&M CHEFS CLUB LTD | London | A rating |
| M&M DISTRIBUTION (SUSSEX) LTD | EAST SUSSEX | A rating |
| M&M FAMILY 3LTD | BIRMINGHAM | A rating |
| M&M FAMILY 4 LTD | Birmingham | A rating |
| M&M FAMILY 8 LTD | Coventry | A rating |
| M&M FAMILY ONE LTD | Birmingham | A rating |
| M&M FINTECH LIMITED | London | A rating |
| M&M Karakas Properties Ltd | London | A rating |
| M&M MAINTENANCE PLUS LTD | LONDON | A rating |
| M&M MARKETING Management LTD | Bradford | A rating |
| M&M METAL FABRICATIONS (BRADFORD) LIMITED | Bradford | A rating |
| M&M PLUMBING EXPERT LTD | London | A rating |
| M&M Stores Ltd | Sheffield | A rating |
| M&M UK RETAIL LTD | BUNTINGFORD | A rating |
| M&MWORKFORCELTD | Shoreham-By-Sea | A rating |
| M&N ACCOUNTANTS LTD | London | A rating |
| M&N BROTHERS LTD | London | A rating |
| M&N Carpet and Flooring Ltd | Hornchurch | A rating |
| M&N Dental Practice | Bedford | A rating |
| M&N KHOHAR LTD T/A RAJAS PIZZA BAR | Glasgow | A rating |
| M&N Medicals Ltd | Huddersfield | A rating |
| M&N SERVICES LONDON LTD | Ilford | A rating |
| M&N Smart Sip Limited | Surrey | A rating |
| M&N SUSHI LTD | Bolton | A rating |
| M&N TRADING MCR LIMITED | Manchester | A rating |
| M&P Care Pvt Ltd | Werrington | A rating |
| M&P Electrician and Construction Ltd | Sutton | A rating |
| M&P Indian Limited T/A Achari Indian Kitchen | Bristol | A rating |
| M&Q CAR TRADERS LTD | OXFORD | A rating |
| M&Q FOOD LIMITED | Stalybridge | A rating |
| M&R Bars Limited t/a Louie Browns | Dalgety Bay | A rating |
| M&R Care Ltd | Bolton | A rating |
| M&R Dealings LTD | Slough | A rating |
| M&R VEG (WHOLESALE) | New Spitalfield Market | A rating |
| M&S Care Solutions Ltd | Oswestry | A rating |
| M&S Commercials Ltd | Manchester | A rating |
| M&S Fried Chicken Limited | Hornchurch | A rating |
| M&S Kingston Limited t/a Roosters Piri Piri | Kingston-Upon-Thames | A rating |
| M&S MOBILES LTD | Bangor | A rating |
| M&S ON-TIME SERVICES LTD | Ilford | A rating |
| M&S SOUTHFIELDS LTD | London | A rating |
| M&S Takeaway Ltd, T/A Meghna Tandoori | London | A rating |
| M&T GLAZING LTD | Birmingham | A rating |
| M&V Fuelstation Ltd | Romford | A rating |
| M&V London Ltd | Hampton | A rating |
| M&V Patel Ltd T/A MKS Store | Shrewsbury | A rating |
| M&Y Engineering Limited | Bromley | A rating |
| M&ZEE INSULATION LTD | Birmingham | A rating |
| M1 KEBABS LIMITED | Cumnock | A rating |
| M1 Managment Services Limited | Borehamwood | A rating |
| M1 Med Beauty | Glasgow | A rating |
| M1 TOPS LIMITED | Manchester | A rating |
| M1 TRANSPORTER LTD | Luton | A rating |
| M1 TYRES LTD | LUTON | A rating |
| M10 Edge Ltd | Stevenage | A rating |
| M10 Fire Consultancy Ltd | St. Albans | A rating |
| M13 Construction Limited | Uxbridge | A rating |
| M18 Foods Ltd | Harlow | A rating |
| M2 (UK) LIMITED | WEMBLEY | A rating |
| M2 Control Systems Limited | Gosport | A rating |
| M21 DETAILING LIMITED | Manchester | A rating |
| M247 (UK) Limited | Manchester | A rating |
| M25 CHAUFFEURS LTD | London | A rating |
| M25 Global LTD | Cheam | A rating |
| M25 LOGISTICS LTD | London | A rating |
| M2A ESTATES LIMITED | Oldham | A rating |
| M2A Media Ltd | London | A rating |
| M2B LOGISTICS LTD | HOUNSLOW | A rating |
| M2H Hospitality Ltd T/A Station 31 | Wembley | A rating |
| M2M Pharmaceuticals Ltd | Reading | A rating |
| M2R2 LTD | Derby | A rating |
| M2SK LIMITED T/A ZAAIKAA | EPPING | A rating |
| M3 (EU) Limited | London | A rating |
| M3 Communications Limited | Wolverhampton | A rating |
| M3 Design Development Limited | London | A rating |
| M3 Strategic Marketing Ltd | NORTHAMPTON | A rating |