| M3 TECHNOLOGY LTD | London | A rating |
| M3at hub limited (Meat Hub) | London | A rating |
| M3J SOLUTIONS LTD | WEMBLEY | A rating |
| M3SSA LIMITED | BIRMINGHAM | A rating |
| M3ter UK Limited | London | A rating |
| M4 Motors Ltd | Hayes | A rating |
| M4 Recruitment | Thatcham | A rating |
| M4 SECURITY GROUP LTD | LONDON | A rating |
| M4 Trading Limited | London | A rating |
| M4S Secure Limited T/A M4S Secure | Ilford | A rating |
| M4siz Limited | Billericay | A rating |
| M5 CABS LIMITED | Worcester | A rating |
| M5K Ventures Limited | London | A rating |
| M5TEC LIMITED | Newton Aycliffe | A rating |
| M7 REAL ESTATE LTD | London | A rating |
| M77 Corporation Support Limited | Milton Keynes | A rating |
| M8 Recovery Limited | Glasgow | A rating |
| M88 SERVICES LIMITED | Ilford | A rating |
| M95 DORCHESTER LIMITED T/A THE SUNDORBON | Dorchester | A rating |
| MA & CO. LTD | Blackpool | A rating |
| MA ACADEMY LTD | Walsall | A rating |
| MA Accountancy Services Ltd | Slough | A rating |
| MA Accountants | Manchester | A rating |
| MA Accountants & Bookkeepers | Manchester | A rating |
| MA Appliances | Oldham | A rating |
| MA Associates NW LTD | BOLTON | A rating |
| MA AUTOS BRADFORD LTD | BRADFORD | A rating |
| Ma Boyle's Alehouse & Eatery | Liverpool | A rating |
| MA BROS UK LIMITED | Nottingham | A rating |
| MA BROTHERS (RETAIL) LIMITED | Newcastle Upon Tyne | A rating |
| MA BUILDERS MCR LTD | Accrington | A rating |
| MA Building Services Nottingham LTD | Nottingham | A rating |
| MA BUSINESS SOLUTIONS (MIDLANDS) LIMITED | Bilston | A rating |
| MA Chiro - Trading as Precision Chiropractic | surrey | A rating |
| MA Construction Ltd | Birmingham | A rating |
| MA Consultants | London | A rating |
| MA Cooper Projects | Deeside Ind Park | A rating |
| MA ESTATES MANAGEMENT LIMITED | LONDON | A rating |
| MA FINANCIAL CONSULTANCY LIMITED | WATFORD | A rating |
| MA FRIED CHICKEN LIMITED T/A SPICY GRILL N FRY | London | A rating |
| MA GLOBAL EXPRESS LTD | BIRMINGHAM | A rating |
| MA Group London Limited | London | A rating |
| MA Guildford Ltd T/A Pepes Piri Piri | Guildford | A rating |
| MA Hayes Ltd T/A Pepes Piri Piri | Hayes | A rating |
| MA Hertford Ltd T/A Pepes Piri Piri | Hertfordshire | A rating |
| MA Home Improvements Ltd | Tipton | A rating |
| MA ILSA Associates Limited | Preston | A rating |
| MA INFO SYSTEMS LTD | Hounslow | A rating |
| MA INTERNATIONAL | GLASGOW | A rating |
| MA Jewellers Ltd | Southall | A rating |
| MA LOGISTICS WORLD LTD | Slough | A rating |
| MA MICRO LIMITED | London | A rating |
| MA Polishing Ltd | Birmingham | A rating |
| MA Retail Birmingham Limited | Birmingham | A rating |
| MA SERVICE STATION LTD | Barking | A rating |
| MA Shop Design Limited | Leicester | A rating |
| MA.GI.MI LTD T/A NAPOLI ON THE ROAD | CHISWICK | A rating |
| MA3 Limited | Newcastle Upon Tyne | A rating |
| MAA Cash And Carry | Worthing | A rating |
| MAA CONSULTANCY SERVICES LIMITED | Greenford | A rating |
| MAA FOOD BAZAR (DEVONS) LTD | LONDON | A rating |
| MAA FOODS UK LIMITED | Solihull | A rating |
| Maa Ji Limited | Sheffield | A rating |
| MAA RECRUITMENT LTD | Huddersfield | A rating |
| MAA SELBY LTD | LEEDS | A rating |
| MAA Trading LTD T/A Drayton Prime Pharmacy | Portsmouth | A rating |
| MAAAB LIMITED | South Dagenham | A rating |
| MAACE LTD | Essex | A rating |
| MAADEV LIMITED T/A SUBWAY | East Sussex, | A rating |
| MAAH CONSULTANCY LTD | England | A rating |
| Maahi Fast Food Limited T/A Vrindavan Vatika | Wembley | A rating |
| Maahi Stores Limited | Hogsthorpe | A rating |
| Maahis Wrexham ltd | Wrexham | A rating |
| MAAK ENTERPRISES UK LTD | Birmingham | A rating |
| MAALEM ENGINEERING UK LTD 15049644 | ENGLAND | UK Expansion Worker: Provisional |
| Maalik & Co | Southall | A rating |
| Maan & Maan Limited | Hayes | A rating |
| Maan and Sons Ltd | London | A rating |
| MAAN BUILDERS LIMITED | Hillingdon | A rating |
| MAAN FOR PROJECTS MANAGEMENT UK LIMITED | Manchester | A rating |
| Maan Transport Ltd | Wednesbury | A rating |
| MAAN TRANSPORT MIDLANDS LTD | Birmingham | A rating |
| Maanch Limited | London | A rating |
| Maankulu Food &Wine (UK) Ltd | Abingdon | A rating |
| MAANU ENTERPRISES LIMITED | Surrey | A rating |
| Maanvi Technologies Limited | West Bromwich | A rating |
| MAAPAA'S KITCHEN LTD | WEMBLEY | A rating |
| MAAPS Design & Architecture Limited | London | A rating |
| MAARAN TECHNOLOGIES LIMITED | Romford | A rating |
| MAAREE | Milton Keynes | A rating |
| MAAS HYPERMARKET LTD | Preston | A rating |
| MAAS TRADERS UK LIMITED | Morden | A rating |
| MAASI'S LTD | CARDIFF | A rating |
| MAASR LTD | Reading | A rating |
| MAAYA CARE LTD | Walsall | A rating |
| Maayan Payments Ltd | Woodford Green | A rating |
| MAAZCO LIMITED | LONDON | A rating |
| Maazi Limited | Matlock | A rating |
| Mabanaft Limited | London | A rating |
| Mabdulle Limited | London | A rating |
| Mabe Post Office and Stores | Cornwall | A rating |
| Mabeline Services Ltd | Harlow | A rating |
| MABELLES CAFE LTD | London | A rating |
| Maben Construction Ltd | Feltham | A rating |
| Maber Associates Ltd | Nottingham | A rating |
| Mabey Hire Ltd | Dewsbury | A rating |
| Mabie House Hotel | Dumfries | A rating |
| MABLEEDS LTD | Sale | A rating |
| Mablethorpe Care Limited | Mablethorpe | A rating |
| Mably Dairies Limited | Wadebridge | A rating |
| Mabyduck Ltd | London | A rating |
| Mac and Co Accountants LTD | Hounslow | A rating |
| Mac and Phone Fix Ltd | Slough | A rating |
| Mac Building Solutions Ltd | London | A rating |
| MAC BUSINESS SERVICES LTD | London | A rating |
| Mac Dental Centre Limited | Cheshire | A rating |
| MAC FOODS GLOBAL LTD | Cheadle | A rating |
| Mac Fuels & Retail Ltd | Northolt | A rating |
| Mac Grocers Ltd | Bathgate | A rating |
| MAC HOME IMPROVEMENTS LONDON LIMITED | Croydon | A rating |
| MAC I (BVI) Limited | London | A rating |
| MAC KOTECHA & COMPANY | LONDON | A rating |
| Mac Motorsport | Dundee | A rating |
| Mac P Ltd | London | A rating |
| MAC plc | Blackpool | A rating |
| Mac Processing Limited | Manchester | A rating |
| MAC REPAIRS LONDON | LONDON | A rating |
| MAC roofing and contracting ltd | Bromborough | A rating |
| MAC Tech Group Ltd | Sutton Coldfield | A rating |
| MAC Traders Ltd t/a Day Today | Glasgow | A rating |
| MAC-RK PRECISION ENGINEERING LIMITED | SOUTHALL | A rating |
| MAC4SALE LTD | Oxon | A rating |
| Macagna ltd T/a Romazzino Alsager | Alsager | A rating |
| MacAlister Elliot & Partners Limited | Lymington | A rating |
| MACALVINS LIMITED | HARROW | A rating |
| MACARONI LLP | POTTERS BAR | A rating |
| MacArthur Barstow and Gibbs Ltd | Worcestershire | A rating |
| MacAulay Askernish Ltd | Isle of South Uist | A rating |
| Macaulay Sinclair Ltd | Nottingham | A rating |
| MACBRIT SOLUTION LIMITED LIMITED | Wembley | A rating |
| Macc Care (Marsh Hill) limited | Birmingham | A rating |
| Macc Care Limited | Birmingham | A rating |
| MACCA Team Ltd | Wilmslow | A rating |
| Maccaferri Ltd | Long Hanborough | A rating |
| Macclesfield Day Nursery | MACCLESFIELD | A rating |
| MacConvilles Ltd | Brighton | A rating |
| Maccreanor Lavington Ltd | London | A rating |
| MacDermid Performance Solutions Services Ltd | Woking | A rating |
| Macdonald Hotels Limited | Bathgate | A rating |
| MacDougall's Arts LTD | LONDON | A rating |
| Macduff Shellfish | Peterhead | A rating |
| MACDUFF SHIP DESIGN LIMITED | Aberdeen | A rating |
| Macduff Shipyards Limited | Macduff | A rating |
| Mace Consult Limited | London | A rating |
| Mace Express | Londonderry | A rating |
| Mace Harris Food and Wine | Cheam | A rating |
| Mace Ltd | London | A rating |
| Mace Stores | Bury St Edmunds | A rating |
| Macfarlan Smith Limited | Edinburgh | A rating |
| Macfarlane + Assocs Ltd | London | A rating |
| Macfarlane Media Limited | London | A rating |
| Macfarlane Media Limited /The Media Image | London | A rating |
| Macfarlanes LLP | London | A rating |
| MacfarlaneTelesystems Ltd | London | A rating |
| Macfirth Hotel and Restaurant Ltd | Elgin | A rating |
| MacG Racing Ltd | Barrow upon Trent | A rating |
| Macgen Power Generation Limited | KILREA | A rating |
| MacGlobal Management Limited | London | A rating |
| Macgochans Ltd | Isle of Mull, | A rating |
| MacGregor Estates Limited | Helensburgh | A rating |
| Macgregor Smith Limited | Bath | A rating |
| Macguys Ltd. | London | A rating |
| MACH Acoustics Limited | Bristol | A rating |
| Mach Bazaar | Burnley | A rating |
| Mach One Design Ltd | Newcastle Upon Tyne | A rating |
| MACH RESOURCES UK LTD | Warrington | A rating |
| Mach42 Ltd | Oxford | A rating |
| MACHAN KITCHEN FARRINGDON LTD | London | A rating |
| Machan kitchen limited | Croydon | A rating |
| Machenta Ltd | London | A rating |
| Machine Building Systems Ltd | Ripley | A rating |
| Machine Medicine Technologies Ltd | London | A rating |
| MACHINE-A LIMITED | London | A rating |
| Machinery & equipment Rental Solutions Ltd | Manchester | A rating |
| Machinery Plant Services Ltd | Northampton | A rating |
| MACHINERY WORLD LIMITED | WOLVEY | A rating |
| Machines with Vision Limited | Edinburgh | A rating |
| Machnet Medical Robotics (UK) Ltd | London | A rating |
| Machos Ltd T/A Machos | Bolton | A rating |
| Machrie Golf Links and Hotel Limited T/A The Machrie Hotel & Golf Links | Isle of Islay | A rating |
| Machynys Golf And Country Club Ltd | Llanelli | A rating |
| MacIntyre Academies Trust | Milton Keynes | A rating |
| MacIntyre Care | Milton Keynes | A rating |
| Macintyre Chocolate Systems Ltd | ARBROATH | A rating |
| MacIntyre Hudson LLP | Milton Keynes | A rating |
| Mack Residential Limited | Cheltenham | A rating |
| Mackay Hotel Company Ltd | Caithness | A rating |
| Mackay Marine UK | Crawley | A rating |
| Mackays Hotel Partnership | Wick | A rating |
| MACKENZIE & EBERT LTD. | Chichester | A rating |