| Meadow Court | Tipton | A rating |
| MEADOW FARM DAIRIES (LEICESTER) LIMITED | LEICESTER | A rating |
| MEADOW FARM HOUSE LTD | Grimsby | A rating |
| Meadow Foods Limited | Chester | A rating |
| Meadow Grange Nursing Home Limited | Dronfield Woodhouse | A rating |
| Meadow Partners LLP | London | A rating |
| Meadowblue Ltd T/A Marine Court Residential Home | Norfolk | A rating |
| MEADOWCROFT EXPRESS | Swindon | A rating |
| Meadowrose Scientific LTD | Reading | A rating |
| Meadows Edge Care Home Ltd | Boston | A rating |
| MEADOWS FARM VETS LTD | BROMSGROVE | A rating |
| Meadows Honey Limited | Higham Ferrers | A rating |
| Meadows Pharmacy | Braintree | A rating |
| Meadows Ryan Solicitors Ltd t/a Meadows & Co | Weybridge | A rating |
| Meadows Visionplus Limited t/a Specsavers | Slough | A rating |
| Meadowside Medical Centre | Congleton | A rating |
| Meadowside Residential Care Home | Marlow | A rating |
| Meadowview Care Ltd | Halstead | A rating |
| Meadowview Nursing Home | Witney | A rating |
| MEAH & CO (UK) LTD | OXON | A rating |
| Meal Box Express Limited | Wembley | A rating |
| Meal Maker Limited | Nottingham | A rating |
| Meallmore LTD | Inverness | A rating |
| Meals 4U Ltd. | Loughborough | A rating |
| MEALTIME MALATANG LTD | London | A rating |
| Mealzo Limited | Glasgow | A rating |
| Meaningful Care Matters | HOVE | A rating |
| Mearns Energy Solutions Ltd | Glasgow | A rating |
| Mearns New1 Limited | Glasgow | A rating |
| Mears Group PLC | Gloucester | A rating |
| Measom Dryline Limited | Leicester | A rating |
| Meastim Ltd | Manchester | A rating |
| MEASURABL LIMITED | Willingham | A rating |
| Measure Protocol Limited | London | A rating |
| Measurelab Ltd | Lewes | A rating |
| MEAT & CHICKEN LTD | London | A rating |
| MEAT & FOOD LTD | Ashton-Under-Lyne | A rating |
| MEAT & WINE COMPANY MAYFAIR LIMITED | London | A rating |
| Meat Club Restaurants Ltd | Birmingham | A rating |
| MEAT GIANT UK LIMITED | Croydon, | A rating |
| MEAT KITCHEN LTD T/A THE GRILL STRATFORD | London | A rating |
| MEAT LOVE BUTCHER LTD | London | A rating |
| MEAT N GREET LTD T/A TARIQ HALAL MEATS | LONDON | A rating |
| Meat Wise Butchers | Croydon | A rating |
| Meatlocker Ltd | Limavady | A rating |
| Meatup Bow UK | London | A rating |
| MEBTRONIC LTD | Peterborough | A rating |
| MEC FIRE SERVICES LTD | Studley | A rating |
| MEC Industrial Engineering LTD | Usk | A rating |
| Mecalux UK Ltd | Birmingham | A rating |
| Mecc | Oakham | A rating |
| MECCA HALAL MEAT LIMITED | Birmingham | A rating |
| Mech Power Limited | Harrow | A rating |
| Mech-Tool Engineering Limited | Darlington | A rating |
| Mecha Engineering Limited | Slough, England | A rating |
| Mechadyne International Limited | Kirtlington | A rating |
| Mechanical Installation & Maintenance (NI) Limited | Londonderry | A rating |
| Mechanical Repair Centre Limited | Walsall | A rating |
| Mechatherm International Limited | Cradley Heath | A rating |
| MECHSMERIZE TECHNOLOGIES LTD | ILFORD | A rating |
| MECKAY LIMITED | ORPINGTON | A rating |
| MECM Limited | London | A rating |
| MECM, Limited | London | A rating |
| Mecrews Healthcare Ltd | Warrington | A rating |
| Mecsam Limited t/a Hackney Pharmacy | London | A rating |
| Med About Food LTD | London | A rating |
| MED CARE HOME SERVICES LIMITED T/A Proactive Life Midlands | Birmingham | A rating |
| MED FOOD WHOLESALE LTD. | London | A rating |
| MED MART LIMITED | LONDON | A rating |
| MED MEDIA GROUP LTD | LIVERPOOL | A rating |
| MED PREP ONLINE LTD | Crawley | A rating |
| MED STOP LTD | HEMEL HAMPSTEAD | A rating |
| Med Style Limited | Cheltenham | A rating |
| Med X Drug Limited | Pinner | A rating |
| MED-CHEM UK LTD | LONDON | A rating |
| Med-E-Tech Ltd | Walton-on Theme | A rating |
| MED-EL UK Ltd | Sheffield | A rating |
| MedAccess Guarantee Ltd | London | A rating |
| MEDACLES LIMITED | London | A rating |
| MEDACO LTD | Bristol | A rating |
| MEDAGENT INTERNATIONAL UK LIMITED | East Sussex | A rating |
| Medaille Trust | Salford | A rating |
| Medallia Limited | London | A rating |
| Medallion Arts Limited | East Grinstead | A rating |
| Medaphor Ltd | Cardiff | A rating |
| MEDART LIMITED | LONDON | A rating |
| Medartis Ltd. | Derby | A rating |
| MEDASHEALTHCARE LIMITED | Bury | A rating |
| Medasil Surgical Limited | Leeds | A rating |
| Medatech UK Ltd | Chandlers Ford | A rating |
| Medbar Southampton | Southampton | A rating |
| Medbrief Services Limited | Birmingham | A rating |
| Medcare Appeal | Willenhall | A rating |
| Medd Care Services Ltd | Glasgow | A rating |
| MEDDICC Ltd | WISBECH | A rating |
| MedDX Solutions Ltd | Hereford | A rating |
| Meddyg Care (Porthmadog) Ltd | Porthmadog | A rating |
| Meddyg Care (Rhyl) Ltd | Rhyl | A rating |
| Meddyg Care Group Holdings Ltd | Porthmadog | A rating |
| Meddygfa Glan Cynon Surgery | Mountain Ash | A rating |
| MEDDYGFA PADARN SURGERY | ABERYSTWYTH | A rating |
| MEDEA MGMT LTD | Manchester | A rating |
| Medecins Sans Frontieres (MSF) UK | London | A rating |
| MEDECON HEALTHCARE UK LIMITED | Long Crendon | A rating |
| Medefer Ltd. | London | A rating |
| Medefine Education Group LTD | London | A rating |
| Medequip Assistive Technology Limited | Harmondsworth | A rating |
| Medetick UK Ltd | Ilford | A rating |
| Medevice Digital Ltd. | Cambourne | A rating |
| Medex 24 LTD | Ilford | A rating |
| MEDEX PHARMA LIMITED | London | A rating |
| MedExpress Enterprises Ltd | London | A rating |
| Medfac UK Ltd | Wellingborough | A rating |
| Medfoods International UK Limited | Harrow | A rating |
| MEDFORD PHARMACEUTICALS UK LIMITED | Slough | A rating |
| MEDHEALTH CARE AND SUPPORT LTD | Newcastle-Under-Lyme | A rating |
| Medherant Ltd | Coventry | A rating |
| Medhurst Ministries | Loftus | A rating |
| Medi Plus Aesthetic LTD | London | A rating |
| Medi Prospects Limited | London | A rating |
| Medi Spec Ltd | Dunstable | A rating |
| Medi-Shop Limited | Harrow | A rating |
| Media 10 Limited | Loughton | A rating |
| Media Advancements Limited | London | A rating |
| Media Agency Group Ltd | London | A rating |
| Media Analytics Ltd | Oxford | A rating |
| Media and Entertainment Solutions Ltd. | London | A rating |
| Media Beast Limited | Birmingham | A rating |
| Media Bounty | London | A rating |
| MEDIA BOUNTY LTD | LONDON | A rating |
| Media Bridge Ltd | London | A rating |
| Media Broadcast Satellite UK Ltd | Bordon | A rating |
| MEDIA CITY SERVICE CENTRE LIMITED | Manchester | A rating |
| Media Finance Capital Limited | London | A rating |
| Media Forty Two Limited | London | A rating |
| Media Interactive Europe Ltd | Bromley | A rating |
| Media IP Rights Limited | LONDON | A rating |
| MEDIA IT SOFT LIMITED | Swindon | A rating |
| Media Legal Defence Initiative | London | A rating |
| Media Liberty Ltd | London | A rating |
| Media Minds Global Ltd | Claygate | A rating |
| MEDIA PRODUCTIONS & SOLUTIONS INT LTD | LONDON | A rating |
| Media Reach Advertising Limited | London | A rating |
| Media Source Plus Ltd. | London | A rating |
| Media Street Limited | Exeter | A rating |
| Media Ventures International Limited | London | A rating |
| MEDIA ZOO LIMITED | LONDON | A rating |
| MediaBase Direct Limited | Fareham | A rating |
| MediaBodies Limited | Leeds | A rating |
| Mediabrands EMEA Ltd | London | A rating |
| MEDIACO LIMITED | MANCHESTER | A rating |
| Mediagenix Ltd | London | A rating |
| Mediahuis Ltd | Belfast | A rating |
| Mediakeys Ltd | Wokingham | A rating |
| MediaKind Systems UK Limited | Southampton | A rating |
| Medialab Group Limited | London | A rating |
| Medialake AI Limited | London | A rating |
| MEDIAMADE LTD | London | A rating |
| MediaMonks London Limited | London | A rating |
| Mediamorph Europe, Ltd | Chichester | A rating |
| MEDIAN WELLNESS LTD | NORTHAMPTON | A rating |
| MediaNerd Ltd | Bracknell | A rating |
| Mediaocean Systems Ltd | London | A rating |
| Mediaplanet Limited | London | A rating |
| Mediaplus Group UK Limited | London | A rating |
| MediaSense Communications Ltd | London | A rating |
| Mediashare Ltd | Dartford | A rating |
| Mediatel Limited | London | A rating |
| MEDIATROOPERS UK LIMITED | London | UK Expansion Worker: Provisional |
| Mediavision Interactive | Farringdon | A rating |
| Mediaworks UK Ltd | Gateshead | A rating |
| MEDIBANK PHARMACY | croydon | A rating |
| MEDIBODY LIMITED | Gateshead | A rating |
| MEDIC ACCOUNTANTS (UK) LLP | HERT | A rating |
| Medic One Systems Ltd | London | A rating |
| MEDIC8HEALTHGROUP LTD | Owen Square, Watford | A rating |
| Medical & Commercial International Limited | London | A rating |
| Medical & Dental Limited | London | A rating |
| MEDICAL & PROFESSIONAL SERVICES LIMITED T/A MAPS MEDICAL | LONDON | A rating |
| Medical Aesthetic Solutions Ltd t/a Fitzrovia Clinic | London | A rating |
| Medical Aid for Palestinians | London | A rating |
| Medical and Dental Defence Union Scotland | Glasgow | A rating |
| Medical Architecture & Art Projects Ltd | London | A rating |
| MEDICAL ASSESSMENT AGENCY LTD | London | A rating |
| Medical Connections Ltd | Swansea Vale | A rating |
| Medical Defence Shield | Bedford | A rating |
| Medical Diagnosis Limited | London | A rating |
| Medical Doorway Limited | Newcastle Under Lyme | A rating |
| MEDICAL EXPERTS LTD | Oldbury | A rating |
| MEDICAL EXPRESS ULTIMATE CARE SERVICE LTD | LONDON | A rating |
| Medical Eye Clinic | Exeter | A rating |
| Medical Group Partners LTD T/A Drip Hydration | London | A rating |
| Medical Human Factors Ltd | London | A rating |
| Medical Imaging Partnership Ltd | Crawley | A rating |
| Medical Imaging Systems Limited | Colindale | A rating |
| Medical Locum Recruitment Limited | London | A rating |
| Medical Management Systems Ltd | London | A rating |
| Medical Record Collation Limited | Altrincham | A rating |
| Medical Research Network | Milton Keynes | A rating |
| MEDICAL SERVICES SOLUTIONS LIMITED | LONDON | A rating |