| Mechanical Services Group Limited | Construction | 2026 |
| Mechbuild Services Ltd | Construction | 2021 |
| Mechcore Engineering Limited | Professional & scientific | 2026 |
| MED Clean South Limited | Administrative & support | 2007 |
| MED22 Ltd. | Health & social care | 2025 |
| Medex Services Ltd | Health & social care | 2015 |
| Medexx Medical Ltd | Education | 2014 |
| Medfab Limited | Construction | 2007 |
| Medi AID (UK) Ltd | Education | 2009 |
| Media Lemon Limited | Information & communication | 2023 |
| Media Starz Ltd | Professional & scientific | 2025 |
| Mediclinic Pharmacies Limited | Wholesale & retail | 2026 |
| Mediclinic Pharmacy Limited | Wholesale & retail | 2017 |
| Medis Carpentry Services Ltd | Manufacturing | 2026 |
| Medlite Ltd. | Health & social care | 2025 |
| Medmow Limited | Manufacturing | 2019 |
| Medway Accountancy and Bookkeeping Limited | Professional & scientific | 2011 |
| Medway Air Services Ltd | Energy | 2019 |
| Medway and Kent Removals Ltd | Transport & logistics | 2026 |
| Medway and Maidstone EAR Syringing Limited | Health & social care | 2022 |
| Medway Barge Company Limited | Transport & logistics | 2015 |
| Medway Builders Merchants Limited | Wholesale & retail | 2010 |
| Medway Clearance Services Ltd. | Water & waste | 2014 |
| Medway Coatings Limited | Manufacturing | 2018 |
| Medway Computer and Gadget Repairs Ltd | Extraterritorial | 2023 |
| Medway Computer Components Limited | Wholesale & retail | 1999 |
| Medway Computer Repairs Ltd | Extraterritorial | 2023 |
| Medway Computer Services Ltd | Extraterritorial | 2023 |
| Medway Computers Ltd | Information & communication | 2004 |
| Medway Controls Engineering Limited | Professional & scientific | 1997 |
| Medway Cosyhomes Ltd | Transport & logistics | 2025 |
| Medway Deaf Training Ltd | Education | 2023 |
| Medway Fine Printmakers CIC | Education | 2019 |
| Medway Gadget Repairs Ltd | Extraterritorial | 2023 |
| Medway Gazette Ltd | Information & communication | 2024 |
| Medway Hair Academy Ltd | Education | 2016 |
| Medway Hauliers Limited | Transport & logistics | 1975 |
| Medway Hybrid Centre Limited | Wholesale & retail | 2017 |
| Medway Ice Cream Supplies Ltd. | Wholesale & retail | 2013 |
| Medway IT Support Ltd | Extraterritorial | 2022 |
| Medway Jet-Wash Solutions Ltd | Administrative & support | 2023 |
| Medway Locksmiths & Security Limited | Manufacturing | 2023 |
| Medway Master Builders Limited | Construction | 1993 |
| Medway Metals Limited | Financial services | 2021 |
| Medway Motors Ltd | Wholesale & retail | 2013 |
| Medway Osteopathic Clinic Ltd | Health & social care | 2021 |
| Medway Pride CIC | Other services | 2021 |
| Medway Properties Solution Ltd | Real estate | 2024 |
| Medway QS Consultancy Limited | Professional & scientific | 2001 |
| Medway Scooters Limited | Wholesale & retail | 1962 |
| Medway Sling Company MKT Limited | Manufacturing | 1996 |
| Medway Sports Club Limited | Arts & recreation | 2022 |
| Medway Towns Gurudawara Sabha Limited(The) | Other services | 1966 |
| Medway Trade Frames Limited | Wholesale & retail | 2014 |
| Medway Travels Limited | Transport & logistics | 2023 |
| Medway Vehicle Movements Ltd | Wholesale & retail | 2025 |
| Medway Vehicle Services Limited | Wholesale & retail | 2025 |
| Medway Windows & Doors Limited | Administrative & support | 2016 |
| Mekanicles Radu Ltd | Construction | 2019 |
| Mekon Football Services Limited | Arts & recreation | 2018 |
| Meliora Solutions Ltd | Construction | 2021 |
| Melissa Limited | Hospitality | 2013 |
| Melkam Residential Partners Limited | Real estate | 2025 |
| Mellos Civil Engineering Ltd | Construction | 2018 |
| Melnik Carpentry Ltd | Construction | 2023 |
| Melo Electrical Services Ltd | Construction | 2023 |
| Meltem Properties Ltd | Construction | 2022 |
| Memco Private Hire Limited | Transport & logistics | 2011 |
| Memco Recruitment Limited | Professional & scientific | 2004 |
| Mems Group Ltd | Real estate | 2021 |
| Mend Pilates Ltd | Arts & recreation | 2025 |
| Mental Capacity Consult Ltd | Health & social care | 2016 |
| Mental Well Care Services Limited | Health & social care | 2022 |
| Mentormaher Ltd | Financial services | 2025 |
| Mepp Limited | Construction | 2022 |
| Meridian Construction Services Limited | Construction | 2015 |
| Meridian Time Development Ltd | Construction | 2002 |
| Merit Careers Limited | Administrative & support | 2017 |
| Merit Couriers Limited | Transport & logistics | 2017 |
| Merit Developments Group Limited | Construction | 2019 |
| Merit Glazing Solutions Limited | Construction | 2021 |
| Merit Group Holdings Limited | Professional & scientific | 2015 |
| Merit Home Builders Limited | Construction | 2017 |
| Merit Homes Dolphins Limited | Construction | 2022 |
| Merit Homes Iden Green Limited | Construction | 2019 |
| Merit Homes Ramsgate Limited | Construction | 2019 |
| Merit Homes Tenterden Limited | Construction | 2020 |
| Merit Homes West Kingsdown Limited | Real estate | 2020 |
| Merit Homes White Cliffs Limited | Construction | 2024 |
| Merit Insulation Supplies Limited | Wholesale & retail | 2018 |
| Merit Office Installations Limited | Transport & logistics | 2000 |
| Merit Professional Services Limited | Administrative & support | 2018 |
| Merit Property Limited | Real estate | 2015 |
| Merit Property Powder Mill Limited | Real estate | 2021 |
| Merit Spaces Limited | Construction | 2018 |
| Merla Dtcg Limited | Information & communication | 2024 |
| Merrah Logistics Ltd | Other services | 2018 |
| Merrahmil Limited | Real estate | 2021 |
| Merrimans View (Properties) Limited | Households | 1994 |
| Meta Evolution Strength Gym Limited | Other services | 2024 |