| Mickleover House Management Company Limited | Real estate | 2004 |
| Mickleover Padel Ltd | Arts & recreation | 2025 |
| Mickleover Services Ltd | Professional & scientific | 2022 |
| Mickleover Sports Club C.I.C. | Arts & recreation | 2017 |
| Mickleover Sports FC Juniors Limited | Arts & recreation | 2023 |
| Mickleover Sports Football Club Limited | Arts & recreation | 2010 |
| Mickleover Travel Ltd | Transport & logistics | 2023 |
| Mickleover Window Cleaning Ltd | Administrative & support | 2026 |
| Micro Blinds Limited | Manufacturing | 2022 |
| Micro Corporation Limited | Manufacturing | 2003 |
| Micro Vtech Solution Limited | Information & communication | 2019 |
| Micro-E C.I.C. | Financial services | 2009 |
| Microavionics UK Limited | Manufacturing | 2009 |
| Microsurface Dynamics Ltd | Manufacturing | 2025 |
| Micurry Ltd | Hospitality | 2020 |
| Midas Jewel Limited | Wholesale & retail | 2021 |
| Midbrook Group Holdings Limited | Financial services | 2024 |
| Middelton Mini Market Ltd | Wholesale & retail | 2023 |
| Midland Advertising Ltd | Professional & scientific | 2020 |
| Midland Building Plastics Holdings Limited | Financial services | 2018 |
| Midland Building Plastics Limited | Wholesale & retail | 2005 |
| Midland Capital Limited | Real estate | 2018 |
| Midland Car Specialists Ltd | Administrative & support | 2017 |
| Midland Communications Distribution Limited | Information & communication | 1997 |
| Midland Composite Fencing Limited | Construction | 2022 |
| Midland Contractors Limited | Construction | 2023 |
| Midland Counties Heating Services Limited | Construction | 1973 |
| Midland Credit Limited | Financial services | 2011 |
| Midland Data Protection Limited | Information & communication | 2019 |
| Midland Direct Performance Ltd | Wholesale & retail | 2026 |
| Midland Doctors Association UK | Health & social care | 2006 |
| Midland Dynamic Property Services Ltd | Construction | 2024 |
| Midland Financial Services Limited | Extraterritorial | 2015 |
| Midland Financial Solutions Limited | Financial services | 2008 |
| Midland Glass Company Limited | Construction | 1983 |
| Midland Land & Property Advisory Ltd | Professional & scientific | 2026 |
| Midland Land Investments Limited | Real estate | 2021 |
| Midland Lettings Ltd | Real estate | 2020 |
| Midland Marquees & Leisure Limited | Wholesale & retail | 2010 |
| Midland Models Ltd | Wholesale & retail | 2024 |
| Midland Oncology Consulting Limited | Health & social care | 2019 |
| Midland Plumbing & GAS Ltd | Construction | 2026 |
| Midland Plumbing and Heating Services Limited | Construction | 2016 |
| Midland Roadways Ltd | Transport & logistics | 2021 |
| Midland Roofing Services (Derby) Limited | Construction | 1979 |
| Midland Roofing Services (Holdings) Limited | Construction | 2019 |
| Midland Stainless Developments Limited | Professional & scientific | 2006 |
| Midland Suburb Property Development Ltd | Real estate | 2024 |
| Midland Test Centre Ltd | Wholesale & retail | 2013 |
| MIDLAND2023 Limited | Wholesale & retail | 2023 |
| Midlands Agricultural Services Ltd | Manufacturing | 2020 |
| Midlands AI Ltd | Information & communication | 2025 |
| Midlands Bait & Tackle Ltd | Wholesale & retail | 2024 |
| Midlands Car Seat Centre Ltd | Wholesale & retail | 2022 |
| Midlands Chauffeurs Limited | Transport & logistics | 2021 |
| Midlands Direct Deals Limited | Wholesale & retail | 2015 |
| Midlands Equipment Ltd | Wholesale & retail | 2014 |
| Midlands Fire Extinguishers Ltd | Public administration | 2023 |
| Midlands Foot Clinic Limited | Health & social care | 2017 |
| Midlands GP Ltd | Health & social care | 2022 |
| Midlands Gym Ltd | Arts & recreation | 2022 |
| Midlands Holdings Ltd | Financial services | 2015 |
| Midlands Horsebox Hire Ltd | Administrative & support | 2021 |
| Midlands Installers Ltd | Manufacturing | 2020 |
| Midlands Insulation Services Limited | Construction | 2005 |
| Midlands IT Solutions Limited | Information & communication | 2013 |
| Midlands JET Washing Ltd | Construction | 2017 |
| Midlands Meal Limited | Hospitality | 2023 |
| Midlands Media Production Ltd | Information & communication | 2021 |
| Midlands Merchants Limited | Information & communication | 2024 |
| Midlands Motor Connect Limited | Wholesale & retail | 2024 |
| Midlands Motor Hub Ltd | Wholesale & retail | 2025 |
| Midlands Music Services Limited | Arts & recreation | 2013 |
| Midlands Online Ltd | Wholesale & retail | 2025 |
| Midlands Peak Events Ltd | Hospitality | 2025 |
| Midlands Pet Ambulance CIC | Professional & scientific | 2026 |
| Midlands Plumbing and Heating Services Limited | Construction | 2018 |
| Midlands Property Associates Ltd | Real estate | 2025 |
| Midlands Property Investment Group Ltd | Real estate | 2023 |
| Midlands Taxi Assets Ltd | Administrative & support | 2026 |
| Midlands Traders and Storage Limited | Construction | 2024 |
| Midlands Women's AID | Hospitality | 1995 |
| Midnight (Eco) Ltd | Agriculture & fishing | 2021 |
| Midsummer Park Homes Ltd | Hospitality | 2026 |
| Midwest Healthcare Limited | Extraterritorial | 2014 |
| Miftahul Hasanat Ltd | Education | 2024 |
| Mighty Oak Property Group Ltd | Real estate | 2025 |
| MIGHTY2SAVE Limited | Wholesale & retail | 2021 |
| Migwig.Com Ltd | Information & communication | 2024 |
| Mihic Limited | Information & communication | 2025 |
| Miigo Properties Limited | Real estate | 2022 |
| Mike Whichello Physiotherapy Limited | Extraterritorial | 2016 |
| Miki Studios Limited | Professional & scientific | 2018 |
| Mikkysoft Technology UK Ltd | Information & communication | 2010 |
| Miko Engineering Services Limited | Manufacturing | 2017 |
| Mikris Investments Limited | Professional & scientific | 2012 |
| MIL- Properties Ltd. | Construction | 2012 |
| Mila Prime Limited | Health & social care | 2025 |
| Milafred Limited | Construction | 2024 |
| Milaho Ltd | Wholesale & retail | 2022 |