| MACKENZIE MARITIME (UK) LIMITED | London | A rating |
| Mackenzie Stuart Limited | Leeds | A rating |
| Mackenzie's Pharmacies Limited | Hull | A rating |
| Mackie and Brechin LTD | Kirkliston | A rating |
| Mackin Consultancy (UK) Ltd | London | A rating |
| MACKINS ACCIDENT REPAIR | NEWRY | A rating |
| Mackintosh Limited | Lancashire | A rating |
| Mackrell Solicitors | London | A rating |
| MACKS LOGISTICS LTD | Wolverhampton | A rating |
| Mackwell Electronics | Walsall | A rating |
| Mackwoods Tea Ltd | London | A rating |
| MacLean Carmichael Limited | Southend-on-Sea | A rating |
| Maclellan Foundation Scotland Limited | Bridge of Allan | A rating |
| MacLeod Estate | Dunvegan | A rating |
| Macleod Estates Ltd | Perth | A rating |
| MacLeod Hotels Limited | Isle of Skye | A rating |
| Macleod Pipework Engineering Limited | Sheffield | A rating |
| MacMace Ltd | Preston | A rating |
| Macmillan Cancer Support | London | A rating |
| Macmillan Publishers International Limited | Basingstoke | A rating |
| MACMILLAN SPIRITS CO LTD T/A Benbecula Distillery | GRAMSDALE | A rating |
| Macomics Limited | Cambridge | A rating |
| Maconda Limited T/a Maconda Solutions | London | A rating |
| Maconomics Ltd t/a Maconomix | London | A rating |
| Macphie Ltd | Stonehaven | A rating |
| Macphilips Foods Ltd | Dagenham | A rating |
| Macquarie Aircraft Leasing Services (UK) Limited | London | A rating |
| Macquarie Group Services Australia Pty Ltd (UK Branch) | London | A rating |
| Macrae Group UK Limited | London | A rating |
| MACRAE HIGHLAND LTD | Pitlochry | A rating |
| Macro Advisory Partners LLP | London | A rating |
| MACRO FOOD CENTRE LTD | London | A rating |
| Macro Group Limited | London | A rating |
| Macro Hive Limited | London | A rating |
| Macro Infotech Limited | London | A rating |
| Macro Smile Limited | Selkirk | A rating |
| Macrobert Arts Centre Limited | Stirling | A rating |
| Macrobond Financial Ltd | London | A rating |
| MACROCOSMOS LTD | London | A rating |
| Macron Sportswear UK Ltd | Cardiff | A rating |
| Macrosynergy Limited | London | A rating |
| MACROWILL PLASTIC ENGINEERING (UK) LTD | Cheshire | A rating |
| Macs Adventure Ltd | Glasgow | A rating |
| MACS EU Ltd | Uxbridge | A rating |
| MacScott Bond Limited | Loanhead | A rating |
| Mactech Consultants Limited | Harrow | A rating |
| Mactech Energy Group Ltd | Whitley Bay | A rating |
| MACVAD UK LIMITED | Hertfordshire | A rating |
| MACWAY LIMITED | Manchester | A rating |
| MACY LTD | London | A rating |
| MAD CONTRACTORS | BRADFORD | A rating |
| Mad Cow Films | London | A rating |
| Mad Dog Media Limited | Stoke on Trent | A rating |
| Mad Dogs Polo Team | Shurlock Row | A rating |
| Mad Lab Fitness LTD | London | A rating |
| Mad Witch Ltd | London | A rating |
| Madam Patti Limited | Swansea | A rating |
| MADAME PHO ST. ANNES LTD | Belfast | A rating |
| Madams Farm Ltd | Midhurst | A rating |
| Madani Builders Merchants | Birmingham | A rating |
| Madani Food Farnworth LTD | Bolton | A rating |
| Madani Food Products Ltd | Walsall | A rating |
| Madani Halal Meat And Groceries Ltd | Dudley | A rating |
| Madani Memorials S.Yorks Limited | Sheffield | A rating |
| Maddaford Care Services Ltd trading as Lakeside Residential home | Okehampton | A rating |
| Madden Bros Ltd | Newtownabbey | A rating |
| Maddiston Traders Ltd t/a Maddiston Mini Market | Falkirk | A rating |
| MADDOCKS TRADING AS RUBYS FOOD AND WINE | MANSFIELD | A rating |
| Maddox Gallery Limited | London | A rating |
| Maddox Research Limited | London | A rating |
| Maddsuperstore Limited | Basingstoke | A rating |
| MADE BEVERAGES LTD | London | A rating |
| Made Brave Ltd | Glasgow | A rating |
| Made by Cooper Ltd | Huddersfield | A rating |
| Made by Many Ltd | London | A rating |
| MADE BY NATURE LIMITED | London | A rating |
| Made by On Limited | London | A rating |
| MADE FASHION | London | A rating |
| MADE IN GREECE LTD | LONDON | A rating |
| Made in Katana UK Limited | London | A rating |
| MADE IN LONDON MEDIA LIMITED | London | A rating |
| Made In Stirling CIC | STIRLING | A rating |
| Made Media Ltd | Birmingham | A rating |
| Made Open Communications Ltd | Truro | A rating |
| Made Tech Ltd | London | A rating |
| Made Thought Design Limited | London | A rating |
| MADE UP LTD | Beckenham | A rating |
| MADE WITH LOVE BRIDAL (Europe) Ltd | London | A rating |
| Made4Care Ltd | Peterborough | A rating |
| Madeba Care Ltd | Redditch | A rating |
| MADEENAT KHALIFA BUILDING MATERIAL TRADING UK LTD 15286572 | ENGLAND | UK Expansion Worker: Provisional |
| Madeira London Ltd | London | A rating |
| Madeira London Retail Ltd | London | A rating |
| MADEJSKI STADIUM HOTEL LIMITED | READING | A rating |
| Madeley Salop Cricket Club | Telford | A rating |
| MadeMake Architectural Design Consulting Ltd | London | A rating |
| Mademoiselle Macaron LTD | Edinburgh | A rating |
| Madeprice Ltd | Hindhead | A rating |
| Mades Kitchen LTS | London | A rating |
| Madfabulous Hotels Ltd | Manchester | A rating |
| MADFIN TECH LTD | London | A rating |
| MADHAN TRADERS LTD | AYLESBURY | A rating |
| MADHANG LTD | Birmingham | A rating |
| MADHAV ENTERPRISE LIMITED | SUNBURY ON THAMES | A rating |
| Madhav Software Solutions Limited | Slough | A rating |
| Madhavy LTD | Crawley | A rating |
| MADHOUSE MEDIA | Birtley | A rating |
| MADHU SUBS LTD | BRIGHTON, EAST SUSSEX | A rating |
| MADHU'S LOGISTICS LIMITED | Leicester | A rating |
| Madhu's Ltd | Hayes | A rating |
| MADHULIYA RETAIL LTD T/A NISA LOCAL | Portsmouth | A rating |
| Madhurima Limited | London | A rating |
| MADHUSRI LIMITED | Sheffield | A rating |
| Madhyamaka Kadampa Meditation Centre | York | A rating |
| Madiba Consulting UK Limited | Bexhill on Sea | A rating |
| Madiba Limited | Leeds | A rating |
| Madic Technologies Limited | Guildford | A rating |
| MadiganGill Logistics Ltd | London | A rating |
| Madina Biryani House Limited | Hounslow | A rating |
| Madina Butchers (Shepherds Bush) Ltd. | London | A rating |
| MADINA CARS LTD | Bedford | A rating |
| Madina Catering Limited T/A Madina Catering | Rochdale | A rating |
| Madina Corp | LONDON | A rating |
| MADINA DELIGHTS LTD | DUNDEE | A rating |
| MADINA FOOD SERVICES LIMITED | Birmingham | A rating |
| MADINA FOOD STORE | SCUNTHORPE | A rating |
| Madina Food Store Rochdale Limited | Rochdale | A rating |
| MADINA GLOVES LTD | Dukinfield | A rating |
| MADINA GRILL (CAMBS) LTD | PETERBOROUGH | A rating |
| Madina Grill House Ltd | London | A rating |
| Madina Halal Groceries Ltd | Swindon | A rating |
| Madina Halal Meat | HUDDERSFIELD | A rating |
| MADINA HALAL MEAT ST ALBANS LTD | St. Albans | A rating |
| MADINA IMPORT EXPORT UK LTD | Manchester | A rating |
| Madina International cash and carry ltd | London | A rating |
| MADINA KITCHENS LTD | Birmingham | A rating |
| Madina Mobile Limited | Birmingham | A rating |
| MADINA SUPER STORE ROCHDALE LTD | Rochdale | A rating |
| MADINA SUPERMARKET LIMITED | HARROW | A rating |
| Madina Travel Nottingham Ltd | Nottingham | A rating |
| MADINAH CONSTRUCTION LTD | Ilford | A rating |
| MADIOX LIMITED | Bolton | A rating |
| Madison Brook International Limited | London | A rating |
| Madison CF UK Limited | Cardiff | A rating |
| Madison International Realty UK Ltd | London | A rating |
| Madison Logic UK Limited | London | A rating |
| MADISON MAY CONSULTING LIMITED | West Yorkshire | A rating |
| MADNI EXPRESS LTD | BIRMINGHAM | A rating |
| Madni Halal Meat Ltd | Slough | A rating |
| MADNI SUPERSTORE LTD | LEICESTER | A rating |
| MADNI TRAVELS LTD | Accrington | A rating |
| MADOONA'S LTD | Surrey | A rating |
| Madras Check UK Ltd | London | A rating |
| Madras Curry Ltd | Glasgow | A rating |
| Madras Dosa House Ltd | Edinburgh | A rating |
| MADRAS FLAVOURS (HOUNSLOW) LTD | London | A rating |
| MADRAS FLAVOURS KITCHENS LTD | Hounslow | A rating |
| Madras Flavours Limited | Reading | A rating |
| Madras Hut Ltd t/a Dosa Kingss | Sale | A rating |
| Madras Junction Ltd | Bristol | A rating |
| Madrasa-Tul-Madina | Glasgow | A rating |
| MADRE LIMITED | LONDON | A rating |
| MADRE PROPERTIES LTD | Harrow | A rating |
| Mady Holiday Home Limited | Kelty | A rating |
| MAE 2 LTD | Oxfordshire | A rating |
| Mae and Mitchell Bespoke Management | Horsforth | A rating |
| MAE'S BAR | Kent | A rating |
| Maeda Gakuen | London | A rating |
| Maedah Grill Ltd | London | A rating |
| MAEKH K.O LTD | Ilford | A rating |
| Maekwae Ltd | Warrington | A rating |
| Maelor Foods Ltd | Wrexham | A rating |
| Maeme's LTD | London, | A rating |
| MAEMES ABERDEEN LTD T/A MAEMES PIRI PIRI | ABERDEEN | A rating |
| MAERSK LINE UK LIMITED | Liverpool | A rating |
| Maersk Logistics and Services UK Ltd | Liverpool | A rating |
| Maersk Tankers UK Limited | London | A rating |
| Maesa UK Limited | London | A rating |
| MAESBROOK ROAD PO LIMITED | Shrewsbury | A rating |
| Maesteg Visionplus Ltd t/a Specsavers, | Maesteg | A rating |
| Maestro Arts Ltd | London | A rating |
| Maestro Care Limited | Eastleigh | A rating |
| Maeving Limited | Coventry | A rating |
| MAF Bedrooms & Kitchens Retail Ltd. | Milton Keynes | A rating |
| MAF Food & Beverages Ltd | Leicester | A rating |
| MAF Properties & Investments Ltd. | Milton Keynes | A rating |
| MAFOG PROPERTIES LIMITED | London | A rating |
| Mafrash London Limited | London | A rating |
| MAFSON LTD | Hexthorpe, Doncaster | A rating |
| MAG ACCOUNTANTS LIMITED | Loughton | A rating |
| MAG EDTECH LIMITED | Cambridge | A rating |
| MAG Games Limited | Brighton | A rating |
| MAG SPA | LONDON | A rating |
| Magawell Ltd T/A Evans Pharmacy | Cardiff | A rating |
| Magben Ltd | Essex | A rating |
| Magcorp Limited | London | A rating |
| Magda Multan Home Ltd | Shrewsbury | A rating |
| MAGDALEN | NORWICH | A rating |
| Magdalen College School | Oxford | A rating |
| Magdalen College School Brackley Academy Trust | Brackley | A rating |