| Medsupply Ltd | Wholesale & retail | 2024 |
| Medu Consulting Limited | Education | 2023 |
| Medusa Enterprises Ltd | Wholesale & retail | 2020 |
| Meduza Design Ltd | Manufacturing | 2014 |
| Medvance Solutions Ltd | Education | 2021 |
| Medz Locum Ltd | Professional & scientific | 2019 |
| Mee&Co Ltd | Financial services | 2017 |
| MEECAKES1 Ltd | Manufacturing | 2026 |
| Meela Property Ltd | Real estate | 2024 |
| Meenah Afro-Carribean Hairstylist Ltd | Wholesale & retail | 2025 |
| Meepav (Holdings) Limited | Financial services | 2025 |
| Meepav Limited | Real estate | 2022 |
| Meera Enterprises Distribution Limited | Wholesale & retail | 2011 |
| Meesh Consulting Limited | Information & communication | 2022 |
| Meesh Corporation Ltd | Wholesale & retail | 2020 |
| Meesha Apparel Ltd | Manufacturing | 2024 |
| Meesha Group Limited | Financial services | 2023 |
| Meet My Tutors Limited | Wholesale & retail | 2019 |
| Meezan Publishing Ltd | Information & communication | 2025 |
| MEF Birtok Limited | Real estate | 2023 |
| Meg-A-Cakes Limited | Professional & scientific | 2025 |
| Mega Autos 24 Ltd | Wholesale & retail | 2021 |
| Mega Eagle Construction Ltd | Construction | 2021 |
| Mega Grosik Ltd | Wholesale & retail | 2019 |
| Mega Mart Online Ltd | Wholesale & retail | 2025 |
| Mega Oriental Limited | Wholesale & retail | 2016 |
| Megadawn Limited | Households | 1992 |
| Megalith Horizons Ltd | Health & social care | 2024 |
| Megan Macquillan Ltd | Wholesale & retail | 2020 |
| Megan's View Limited | Households | 2021 |
| Megatag Laser Games Ltd | Manufacturing | 2024 |
| Megatron Estate Ltd | Real estate | 2024 |
| Megaworth Limited | Real estate | 1999 |
| Megh Healthcare Services Limited | Public administration | 2024 |
| Megh IT Services Ltd | Information & communication | 2025 |
| Meghna Optical Ltd | Health & social care | 2024 |
| Megi Services Limited | Construction | 2025 |
| Meh-Mi Ltd | Wholesale & retail | 2023 |
| Mehar & Co Estate Planning Limited | Administrative & support | 2024 |
| Mehar Brothers Limited | Wholesale & retail | 2023 |
| Mehar Properties and Lettings Ltd | Real estate | 2024 |
| Mehar Properties Ltd | Real estate | 2014 |
| Mehar Property Investments Ltd | Real estate | 2021 |
| Mehdi Properties Limited | Real estate | 2017 |
| Mehler Texnologies Limited | Wholesale & retail | 1980 |
| Mehmaan Lunch Club CIC | Health & social care | 2026 |
| Mehmi Transport Ltd | Transport & logistics | 2025 |
| Mehral Digital Services Ltd | Wholesale & retail | 2023 |
| Mehsan International Limited | Transport & logistics | 2024 |
| Mehta Group Ltd | Information & communication | 2018 |
| Mehta Investments Limited | Real estate | 2005 |
| Mehtab Reporting Limited | Health & social care | 2010 |
| Mehul Electrical Ltd | Manufacturing | 2023 |
| MEI FA Thai Massage & Foot Spa Ltd. | Health & social care | 2025 |
| Meight Events Ltd | Arts & recreation | 2023 |
| Meiles Namai Limited | Professional & scientific | 2022 |
| MEJ Limited | Manufacturing | 2016 |
| MEK Group Ltd | Wholesale & retail | 2023 |
| MEK Investments Limited | Information & communication | 2017 |
| Mekavo Ltd | Information & communication | 2025 |
| Mekko Technologies Limited | Manufacturing | 2017 |
| Mekli Cars Ltd | Wholesale & retail | 2025 |
| Mekli Ltd | Wholesale & retail | 2023 |
| Meku Cleaning Services Ltd | Administrative & support | 2025 |
| Mela Private Limited | Construction | 2025 |
| Melaya Ltd | Wholesale & retail | 2019 |
| Melba Sky Ltd | Real estate | 2020 |
| Melbourne Road (Ibstock) Management Company Limited | Households | 2014 |
| Melcom Systems (East Midlands) Ltd | Administrative & support | 2020 |
| Meldon Aggregates Limited | Mining & quarrying | 2024 |
| Melinde Limited | Administrative & support | 2024 |
| Melissani Consulting Limited | Financial services | 2016 |
| Melita Group Limited | Financial services | 2017 |
| Melita P.O.S. Limited | Manufacturing | 2005 |
| Mella Private Limited | Construction | 2025 |
| Mellifluus UN Ltd | Financial services | 2025 |
| Mellor Bromley Air Conditioning Services Limited | Construction | 1969 |
| Mellor Bromley Investments Limited | Professional & scientific | 2016 |
| Mellow Vibes Limited | Wholesale & retail | 2018 |
| Melody Bell Snowdon Properties Ltd | Financial services | 2026 |
| Melora Fruit & VEG Ltd | Wholesale & retail | 2025 |
| Melostar Ltd | Real estate | 2023 |
| Melrose Engineering Limited | Administrative & support | 2015 |
| Melrose Polymers Holdings Limited | Water & waste | 2020 |
| Melrose Polymers Limited | Water & waste | 2020 |
| Melrose Welborn Ltd | Wholesale & retail | 2025 |
| Melsham Milden Ltd | Wholesale & retail | 2025 |
| Melt Catering Ltd | Hospitality | 2023 |
| Meltdown Gym Limited | Arts & recreation | 2015 |
| Melton Beauty Box Ltd | Other services | 2022 |
| Melton Butchers Ltd | Wholesale & retail | 2017 |
| Melton Electricals Ltd | Wholesale & retail | 2005 |
| Melton Fire and Security Ltd. | Construction | 2014 |
| Melton Groceries Fruit & VEG Ltd | Wholesale & retail | 2025 |
| Melton Launderette Ltd | Other services | 2021 |
| Melton Mowbray & District Model Engineering Society | Arts & recreation | 1996 |
| Melton Optics Limited | Health & social care | 2001 |
| Melton Orthodontics NO 2 Limited | Health & social care | 2017 |
| Melton Pizza Hub Ltd | Hospitality | 2025 |
| Melton Pizza Ltd | Hospitality | 2020 |