| Mcswiggan Civils Ltd | Construction | 2026 |
| MD Car Body Repairs Ltd | Wholesale & retail | 2024 |
| MD Elevate Ltd | Administrative & support | 2025 |
| Mdjn Ltd | Information & communication | 2026 |
| ME Cooling Limited | Construction | 2023 |
| ME1 Sauna Services (UK) Limited | Other services | 2017 |
| Mead Training Solutions Limited | Administrative & support | 2022 |
| Meads Hartley Associates Limited | Professional & scientific | 2015 |
| Measureplex Limited | Administrative & support | 2008 |
| MEB Property Services Ltd | Construction | 2023 |
| Medchip Solutions Ltd | Manufacturing | 2012 |
| Medelec Ltd | Construction | 2025 |
| Media Matters (Peterborough) Limited | Manufacturing | 2015 |
| Media Melds Ltd | Manufacturing | 2024 |
| Mediaproquo Ltd | Administrative & support | 2018 |
| Medibeth Ltd | Health & social care | 2025 |
| Medipharm Holdings Limited | Extraterritorial | 2022 |
| Meditation Inc Ltd | Health & social care | 2022 |
| Medsecs South East Limited | Health & social care | 2019 |
| Medspray Test Centre Limited | Wholesale & retail | 2008 |
| Medtow Marine Limited | Administrative & support | 2005 |
| Medway Air CON Ltd | Energy | 2025 |
| Medway Associates Limited | Administrative & support | 2013 |
| Medway Auctions Limited | Wholesale & retail | 2024 |
| Medway Blinds Ltd | Administrative & support | 2005 |
| Medway Boiler Installs Ltd | Construction | 2025 |
| Medway Cabs Ltd | Transport & logistics | 2021 |
| Medway CAN Sing CIC | Arts & recreation | 2023 |
| Medway Chefs Limited | Hospitality | 2021 |
| Medway City Estates Ltd | Households | 2017 |
| Medway City Motor Centre Limited | Wholesale & retail | 2007 |
| Medway Culture Club Ltd | Education | 2020 |
| Medway Development Company (Land and Projects) Ltd | Construction | 2020 |
| Medway Development Company (New Homes) Ltd | Real estate | 2024 |
| Medway Development Company (PRS) Ltd | Real estate | 2020 |
| Medway Development Company Limited | Real estate | 2017 |
| Medway Electrical Wholesalers Limited | Professional & scientific | 1975 |
| Medway Engagement Group and Network CIC | Health & social care | 2012 |
| Medway Ethnic Minority Forum Limited | Other services | 2001 |
| Medway Heights Management Company Limited | Households | 2004 |
| Medway Hills Ltd | Information & communication | 2023 |
| Medway Hire Ltd | Administrative & support | 2014 |
| Medway Homecare Limited | Health & social care | 2023 |
| Medway Homes Holdings Ltd | Real estate | 2026 |
| Medway Industrial Tyres Limited | Wholesale & retail | 1980 |
| Medway Investors Ltd | Real estate | 2021 |
| Medway Kabaddi Club Limited | Arts & recreation | 2014 |
| Medway Learning Space CIC | Education | 2024 |
| Medway Machine Tools Limited | Wholesale & retail | 2024 |
| Medway Maritime Swimming Club Ltd | Education | 2020 |
| Medway Masala Ltd | Hospitality | 2022 |
| Medway Memorials (Kent) Ltd | Construction | 2016 |
| Medway Oikotaan Cultural (Moca) Limited | Education | 2024 |
| Medway Open Studios CIC | Administrative & support | 2021 |
| Medway Plumbing Limited | Construction | 2016 |
| Medway Premier Homes.Com Ltd | Real estate | 2010 |
| Medway Property Investments Ltd | Real estate | 2024 |
| Medway Public Services Limited | Information & communication | 2016 |
| Medway RC Raceway Limited | Arts & recreation | 2024 |
| Medway Rewind Services Limited | Wholesale & retail | 1971 |
| Medway Roofers Ltd | Construction | 2021 |
| Medway Roofing Ltd | Construction | 2021 |
| Medway Scaffolding Ltd | Administrative & support | 2020 |
| Medway Soup Kitchen CIC | Hospitality | 2025 |
| Medway South PCN Limited | Health & social care | 2023 |
| Medway Sports Technology Ltd. | Arts & recreation | 2017 |
| Medway Taxis Limited | Transport & logistics | 2017 |
| Medway Transport Ltd | Transport & logistics | 2021 |
| Medway Transport Solutions Ltd | Transport & logistics | 2024 |
| Medway Tree Surgeons Ltd | Administrative & support | 2008 |
| Medway UK and Chancheng-Foshan Friendship Association Ltd | Professional & scientific | 2011 |
| Medway Vehicle Sales Ltd | Wholesale & retail | 2024 |
| Medwayish Community Interest Company | Wholesale & retail | 2025 |
| Meehan Rail Limited | Professional & scientific | 2019 |
| Meeting Room Solutions Ltd | Information & communication | 2024 |
| MEF Clean Limited | Health & social care | 2013 |
| Megga Telecom Ltd | Information & communication | 2022 |
| Mehveer Ltd | Manufacturing | 2019 |
| MEK DRY Linning Ltd | Construction | 2021 |
| MEK Medicals Ltd | Health & social care | 2022 |
| Melad Barming Limited | Hospitality | 2025 |
| Melaramis Limited | Hospitality | 2026 |
| Melia Tiles Distribution Ltd | Construction | 2024 |
| Meliora Business Solutions Ltd | Professional & scientific | 2021 |
| Menacci Limited | Wholesale & retail | 2026 |
| Mental Welfare UK Ltd | Education | 2022 |
| Mentor Educational Consult Ltd | Administrative & support | 2010 |
| Mentor Support Housing Services Ltd | Real estate | 2025 |
| Mentor Support Services C.I.C. | Hospitality | 2025 |
| Meraxes Digital Ltd | Information & communication | 2026 |
| Mercia Recruitment (Social Care) Limited | Administrative & support | 2017 |
| Mercury Podcasts Ltd | Professional & scientific | 2025 |
| Mercury Worksafe Limited | Manufacturing | 2018 |
| Mercy Charles Properties Ltd | Real estate | 2026 |
| Mercy, Bell & Co Events, Functions and Engagements Leasing Services Ltd | Hospitality | 2026 |
| Mercy, Bell & Co Ltd. | Real estate | 2019 |
| Merlin City Way Limited | Wholesale & retail | 2016 |
| Merlin Health Ltd | Health & social care | 2021 |
| Merlin Pharmaceutics Limited | Financial services | 2018 |
| Merlin Silverweed Limited | Wholesale & retail | 2016 |