| Microtrax Limited | London | A rating |
| Microtrol Limited | Worcester | A rating |
| Miculi Construction Ltd | Brentford | A rating |
| Mid and South Essex NHS Foundation Trust | Southend On Sea | A rating |
| Mid Antrim Vineyard | Ballymena | A rating |
| Mid Cheshire Hospitals NHS Foundation Trust | Crewe | A rating |
| MID DEVON CURRY LTD | Crediton | A rating |
| Mid Devon District Council | Tiverton | A rating |
| Mid Hospitality Ltd t/a Kinkally | London | A rating |
| MID SUFFOLK MEDICAL SUPPLIES LTD | NORWICH | A rating |
| MID SURREY CARE SERVICES LTD t/a SURECARE MID SURREY | Reigate | A rating |
| Mid Ulster Health Care | Dungannon | A rating |
| Mid Yorkshire Teaching NHS Trust | Wakefield | A rating |
| Mid-Sussex Super Cream | Burgess Hill | A rating |
| MID-VIEW HEALTHCARE LTD | Birmingham | A rating |
| MIDA Commercials Ltd | Wednesbury | A rating |
| MIDAL CABLES INTERNATIONAL LIMITED | Hounslow | A rating |
| MIDAS (Euro) Limited | Bolton | A rating |
| Midas Care Solutions Ltd | Wolverhampton | A rating |
| Midas Public Relations Limited | London | A rating |
| MIDAS TOUCH BUSINESS SERVICES LIMITED | Surrey | A rating |
| Midas VFX Ltd | London | A rating |
| Midasplayer.com Limited | LONDON | A rating |
| Midcare Services Ltd | Brierley Hill | A rating |
| MidCo Care Limited | Hatfield | A rating |
| Midcounties Cooperative | Warwick | A rating |
| Middle Chare Medical Group | Chester Le Street | A rating |
| Middle East & European Trading Ltd | Altrincham | A rating |
| Middle East Airlines - Air Liban | London | A rating |
| Middle East News UK Limited | London | A rating |
| Middle East Petroleum & Economic Publications (UK) Limited | London | A rating |
| Middle East Plastic International Ltd. | london | A rating |
| Middle Eastern Women and Soceity organisation | London | A rating |
| Middle Feast Limited | York | A rating |
| MIDDLE GREEN MOTORS (MGM) LIMITED | Feltham | A rating |
| Middle Ground Theatre Company Ltd | Malvern Wells | A rating |
| Middle Table Limited | London | A rating |
| MIDDLEBY UK LTD | Golborne | A rating |
| Middlemarch Environmental Ltd | Coventry | A rating |
| MIDDLEMORE COACHWORKS LTD | Sandwell | A rating |
| MIDDLEPATCH LTD T/A COLLEGE FIELDS NURSING HOME | BARRY | A rating |
| Middlesbrough College | Middlesbrough | A rating |
| Middlesbrough Cricket Club | Middlesbrough | A rating |
| Middlesbrough Football Club | Darlington | A rating |
| Middlesex County Cricket Club | London | A rating |
| MIDDLESEX ENERGY SOLUTIONS LTD | Uxbridge | A rating |
| Middlesex Fire Stopping Limited | Bourne End | A rating |
| Middlesex Learning Partnership | Hayes | A rating |
| Middlesex Ltd | Bourne End | A rating |
| Middlesex Meat Market (UK) Ltd | Hayes | A rating |
| Middlesex Readymix Concrete Ltd | Denham | A rating |
| Middlesex University | London | A rating |
| Middleton and Rose LLP | Blairgowrie | A rating |
| Middleton Cricket Club | Manchester | A rating |
| MIDDLETON GROVE LIMITED | EAST SUSSEX | A rating |
| Middleton Lodge Practice | Newark | A rating |
| Middleton Manufacturing Limited | Milton Keynes | A rating |
| Middleton Raw Dog Food Limited | MANCHESTER | A rating |
| Middleton Sheet Metal Co. Limited | Manchester | A rating |
| Middleton Sports Club | Bognor Regis | A rating |
| Middletons (Norwich) Limited | Norwich | A rating |
| Middlewaretalents | reading | A rating |
| Middleway Pharmacy | Cornwall | A rating |
| Middx Plumb & Electric Wholesaler Ltd | Greenford | A rating |
| Midea Home Appliances UK Ltd | Manchester | A rating |
| MIDEUROPA LLP | London | A rating |
| MIDFORD ROAD NURSERY | BATH | A rating |
| Midgard Advisors Limited | Whitstable | A rating |
| Midgard Limited | Borehamwood | A rating |
| Midhurst Horse Transport Ltd | Midhurst | A rating |
| Midjune Ltd | London | A rating |
| MidKent College | Gillingham | A rating |
| Midland Aluminium System Ltd | West Bromwich | A rating |
| MIDLAND AUTO SERVICES & EXPORTS LTD | BIRMINGHAM | A rating |
| Midland Automation Limited T/A Kempston Controls | Rushden | A rating |
| MIDLAND BROTHERS LIMITED T/A 2 TREAT U | Birmingham | A rating |
| MIDLAND CAR SPARES LIMITED | Birmingham | A rating |
| Midland Care (UK) Ltd | Birmingham | A rating |
| Midland Care Support & Enablement Ltd | Wolverhampton | A rating |
| MIDLAND CARS HUB LTD | Oldbury | A rating |
| Midland Catering Limited | Birmingham | A rating |
| Midland Contractors Limited | DERBY | A rating |
| Midland Expressway Limited | Lichfield | A rating |
| Midland Fixings Ltd | Beeston | A rating |
| Midland Food Services Ltd | Bedford | A rating |
| MIDLAND FURNITURE & CARPETS LIMITED | Nottingham | A rating |
| Midland Health Care Services Limited | WEDNESBURY | A rating |
| Midland Heating & Plumbing Services | Burton On Trent | A rating |
| MIDLAND HOUSING ROOMS LTD | BIRMINGHAM | A rating |
| Midland Letting and Sales Ltd. | Birmingham | A rating |
| MIDLAND MEAT & POULTRY LIMITED | BIRMINGHAM | A rating |
| MIDLAND MOTOR FUELS LTD | Birmingham | A rating |
| Midland News | Worcester | A rating |
| Midland Pressure Diecasting Limited | Willenhall | A rating |
| Midland Residential Care Ltd | WALSALL | A rating |
| MIDLAND SECURITY LTD | Birmingham | A rating |
| Midland Sprinter Specialist Limited | Birmingham | A rating |
| Midland Steel Reinforcement Supplies GB Ltd | Rochester | A rating |
| Midland Structures Limited | Brierley Hill | A rating |
| Midland Telecom Networks Group Ltd | Birmingham | A rating |
| MIDLAND TEXTILES LIMITED | Birmingham | A rating |
| MIDLANDS AIRPORT PARKING LTD | Derby, England | A rating |
| Midlands Building Suppliers Ltd | Birmingham | A rating |
| Midlands Care Direct Ltd | Leicester | A rating |
| Midlands Care Services Ltd | Birmingham | A rating |
| MIDLANDS CASH & CARRY LIMITED | Coventry | A rating |
| MIDLANDS DISPUTE SOLUTIONS LTD | Birmingham | A rating |
| Midlands Diving Chamber Ltd | Rugby | A rating |
| Midlands Installers Ltd | Derby | A rating |
| MIDLANDS KNOWLEDGE AND CARE SKILLS LTD | Covent Garden | A rating |
| MIDLANDS MEAL LTD T/A HOUSE BOAT | DERBY | A rating |
| Midlands Medical Partnership | Birmingham | A rating |
| Midlands Medicare Agency Ltd | Birmingham | A rating |
| Midlands Partnership NHS Foundation Trust | Stafford | A rating |
| Midlands Plastics And Plumbing (Stoke) Ltd | Stoke On Trent | A rating |
| MIDLANDS PROPERTY DEVELOPERS LIMITED | Leicester | A rating |
| MIDLANDS RECYCLING LTD | Birmingham | A rating |
| MIDLANDS RESIDENTIAL CARE LTD | Walsall | A rating |
| Midlands Services Ltd | KETTERING | A rating |
| Midlands Tech Ltd T/A Floorington | Bilston, | A rating |
| MIDLANDS TOTAL CARE LIMITED | Corby | A rating |
| Midlands Truck and Van Limited | Smethwick | A rating |
| Midlands Ventures Ltd | Smethwick | A rating |
| Midlandwide Limited | Wednesbury | A rating |
| MIDLIFE CREATIONS LIMITED | LONDON | A rating |
| MIDLOTHIAN CAR SALES LTD t/a Magnum Car Sales | Broxburn | A rating |
| Midlothian Council | Dalkeith | A rating |
| Midlothian Young People's Advice Service | Dalkeith | A rating |
| Midmar Capital LLP | EDINBURGH | A rating |
| Midmist Munch LTD T/a Chaiiwala | Norwich | A rating |
| Midnight Mango Ltd | Bridgwater | A rating |
| MIDOCEAN SOLUTIONS LTD | coventry | A rating |
| MIDORI ALUMINIUM LTD | Leicester | A rating |
| Midplant LTD T/A promenade care home | Southport | A rating |
| Midrex UK Ltd | London | A rating |
| MIDSHIRE SECURITY LTD | Birmingham | A rating |
| Midshire Veterinary Group Ltd | Nuneaton | A rating |
| Midshires Care Limited | Alcester | A rating |
| Midshires Care Ltd (Helping Hands Home Care - North) | Kinwarton | A rating |
| Midshires Care Ltd (Helping Hands Home Care) - Central | Alcester | A rating |
| Midshires Care Ltd (Helping Hands Home Care) - East | Alcester | A rating |
| Midshires Healthcare Limited | Riddings | A rating |
| Midsomer Dispensing Ltd | Redland | A rating |
| Midsomer Norton Cricket Club | Midsomer Norton | A rating |
| Midsomer Norton Schools Partnership | MIDSOMER NORTON | A rating |
| Midsommer Visionplus Limited t/a Specsavers | Midsomer Norton | A rating |
| Midsummer Energy Ltd | Cambridge | A rating |
| Midsummer House Restaurants LLP | Cambridge | A rating |
| MIDTHERM FLUE SYSTEMS LTD | Netherton, Dudley | A rating |
| Midton Acrylics Limited | Lochgilphead | A rating |
| Midtop Ltd | Great Malvern | A rating |
| MIDTS LIMITED | Cambridge | A rating |
| MIDWAY CARE GROUP LIMITED | NOTTINGHAM | A rating |
| MIDWAY HALAL FOOD STORE LIMITED | Rusholme | A rating |
| Midways TE Ltd | Winson Green, Birmingham | A rating |
| Midwest Consulting Limited | Yeovil | A rating |
| Midwest Hospitality Ltd TA The Garden Bar | Wolverhampton | A rating |
| Midwich Limited | Diss | A rating |
| MIE SOLUTIONS UK LTD | Redditch | A rating |
| Miebach Consulting Limited | Abingdon | A rating |
| Mieko ltd | london | A rating |
| Miele Company Limited | Abingdon | A rating |
| Mien Tay (Kingsland) Ltd t/a Mien Tay | London | A rating |
| Mierra Jewellery Maart Ltd | London | A rating |
| Mieszko Foodcity (Watford) Limited t/a Mieszko | Watford | A rating |
| Mieszko Foodcity Limited | Perivale | A rating |
| Mieszko Streatham Limited | Streatham | A rating |
| MiExact Ltd | London | A rating |
| MIF Services (UK) Limited | London | A rating |
| Mifadelo Global Religion Law and Health Found Ltd | London | A rating |
| MiFinity UK Limited | Netownbreda | A rating |
| Migatronic Welding Equipment Ltd. | Leicestershire | A rating |
| Migdale Transport Ltd | Bonar Bridge | A rating |
| Might & Grace Productions CIC | Milton Keynes | A rating |
| Mighton Products Ltd | Saffron Walden | A rating |
| Mighty Giant Limted | Manchester | A rating |
| Mighty Health Care Limited | Cardiff | A rating |
| Mighty Men of Valour (MMOV Care) | Croydon | A rating |
| MIGHTY POUND UK LIMITED | London | A rating |
| Mighty Recruitment Ltd | Hatfield | A rating |
| MIGHTY TRADING LTD | TIPTON | A rating |
| Mighty Travels Ltd | Birmingham | A rating |
| MightyHive Limited | London | A rating |
| MightyOlu Ltd | Ediburgh | A rating |
| Mignon Technologies Ltd, T.A. Literal Labs | Newcastle upon Tyne | A rating |
| Migom Ltd. | London | A rating |
| Migra & Co | London | A rating |
| Migrant Centre NI | Lurgan | A rating |
| MIGRANT CHECK LTD | London | A rating |
| Migrants Organise | London | A rating |
| MIH Internet (UK) Ltd | London | A rating |
| Mihai Dumitru Raul LTD | Grays | A rating |
| Miicare Ltd | London | A rating |
| Miista Limited | London | A rating |
| MIITERA TECHNOLOGIES Ltd | STRATFORD UPON AVON | A rating |
| MIJ Exhaust Ltd | Birmingham | A rating |
| MIJITO LIMITED | Kent | A rating |
| Mijo Krish Infotech Limited | Bristol | A rating |
| MIK Fund Solutions UK Ltd | Belfast | A rating |
| Mika R G Ltd | London | A rating |