| MCG Beauty Lounge Ltd | Other services | 2025 |
| Mcgorum's Catering Ltd | Hospitality | 2024 |
| MCI Construction Leicester Ltd | Construction | 2026 |
| MCJ (Leicester) Limited | Transport & logistics | 2013 |
| Mcjac Health Ltd | Education | 2024 |
| Mckenzie Reid Consultancy Ltd | Professional & scientific | 2023 |
| Mckinstrey Digital & Technology Services Limited | Information & communication | 2023 |
| Mckl Group Limited | Wholesale & retail | 2014 |
| MCL Corporation Limited | Administrative & support | 2018 |
| MCL Group of Companies Limited | Other services | 2016 |
| MCL Holdco B Limited | Extraterritorial | 2016 |
| MCL Investments Limited | Real estate | 2014 |
| MCL Properties Limited | Real estate | 2014 |
| MCL Trustees Limited | Professional & scientific | 2019 |
| Mclellan Ferguson Clinical Ltd | Health & social care | 2021 |
| Mclellan Ferguson Ltd | Professional & scientific | 2019 |
| MCM Safety and Security Ltd | Administrative & support | 2025 |
| Mcmullan Architecture Ltd | Professional & scientific | 2025 |
| Mcneil Group Limited | Financial services | 2022 |
| Mcneil Ventures Ltd | Real estate | 2005 |
| Mcore Physiotherapy Clinic Limited | Financial services | 2024 |
| Mcqueen Jones Property Limited | Real estate | 2019 |
| Mcqueens Tax Services Limited | Professional & scientific | 2018 |
| MCR Fabric Ltd | Wholesale & retail | 2021 |
| Mcrobbies Tyres Ltd | Wholesale & retail | 2014 |
| Mcrobbies Tyres Wigston Ltd | Wholesale & retail | 2020 |
| MCS Care Services Limited | Health & social care | 2014 |
| MCS Construction Group Ltd | Construction | 2018 |
| MCS Group Holdings Leicester Ltd | Financial services | 2026 |
| MCS Legal Limited | Professional & scientific | 2024 |
| MCS1 Ltd | Transport & logistics | 2022 |
| MCT Trans Ltd | Transport & logistics | 2011 |
| Mctwist Shawarma Ltd | Hospitality | 2024 |
| MCV77 Limited | Transport & logistics | 2024 |
| Mcveigh Holdings Limited | Financial services | 2026 |
| Mcveigh Solutions Limited | Financial services | 2014 |
| MCW Legal Services Limited | Professional & scientific | 2025 |
| Mcwilliam Consultants Services Limited | Professional & scientific | 2014 |
| Mcwit Ltd | Hospitality | 2023 |
| MCX Advisory Ltd | Professional & scientific | 2024 |
| Mcxi Limited | Education | 2019 |
| MCZ Dent Removal Ltd | Wholesale & retail | 2022 |
| MD Advisory Limited | Professional & scientific | 2006 |
| MD Elliott Construction Ltd | Construction | 2019 |
| MD Euro Motors Ltd | Wholesale & retail | 2025 |
| MD HGV Ltd | Transport & logistics | 2010 |
| MD Infinity Ltd | Real estate | 2022 |
| MD Investment Properties Ltd | Real estate | 2026 |
| MD Lowe & Sons Funeral Services Limited | Other services | 2001 |
| MD Marketing Direct Ltd | Professional & scientific | 2025 |
| MD Medical Services Ltd | Health & social care | 2025 |
| MD Mortgages Ltd | Financial services | 2018 |
| MD Properties (Leicester) Limited | Real estate | 2018 |
| MD Supplies and Services Limited | Other services | 2014 |
| MD Trans Ltd | Wholesale & retail | 2015 |
| MD UK Transport Limited | Transport & logistics | 2026 |
| MD Wilkins Packaging Limited | Administrative & support | 2025 |
| MDA Engineering Limited | Professional & scientific | 2013 |
| MDA Publishing House Limited | Information & communication | 2024 |
| MDA Solutions Limited | Financial services | 2013 |
| Mdahx Ltd | Wholesale & retail | 2022 |
| MDB & Sons Ltd | Real estate | 2017 |
| MDB Vehicle Building Ltd | Construction | 2010 |
| MDC Internet Solutions Ltd | Information & communication | 2018 |
| MDD Builders Ltd | Construction | 2025 |
| MDK (UK) Ltd | Extraterritorial | 2009 |
| MDK Office Seating Limited | Manufacturing | 2006 |
| MDL Estates (UK) Limited | Real estate | 2014 |
| Mdluxeauto Ltd | Wholesale & retail | 2024 |
| MDM Financial Services Ltd | Financial services | 2021 |
| MDM Group Ltd | Construction | 2025 |
| MDM Vehicle Deliveries Limited | Transport & logistics | 2017 |
| MDN & Family Limited | Real estate | 2026 |
| MDO Contracting Ltd | Administrative & support | 2017 |
| MDR Interior Specialists Ltd | Manufacturing | 2010 |
| MDR Training (UK) Limited | Administrative & support | 2007 |
| MDS Law Holdings Limited | Professional & scientific | 2020 |
| Mdsw Electrical Ltd | Construction | 2024 |
| Mduk.Com Holdings Limited | Financial services | 2023 |
| Mduk.Com Ltd | Manufacturing | 2001 |
| Mdurrani Limited | Health & social care | 2014 |
| MDW Fireplace Services Limited | Construction | 2007 |
| MDW Traders Limited | Hospitality | 2025 |
| ME and My Voice Limited | Information & communication | 2023 |
| ME Aviation Solutions Ltd | Wholesale & retail | 2025 |
| ME Construction Limited | Construction | 2007 |
| ME Sports in the Community CIC | Education | 2020 |
| ME, WE Studios Limited | Information & communication | 2009 |
| ME360 Healthcare Limited | Health & social care | 2021 |
| MEA Commerce Limited | Arts & recreation | 2026 |
| Meaden Oxford Limited | Construction | 2022 |
| Meadow Brooke Consulting Limited | Information & communication | 2019 |
| Meadow Commercials Ltd | Wholesale & retail | 2025 |
| Meadow Court Care Ltd | Health & social care | 2024 |
| Meadow Farm Dairies (Leicester) Limited | Wholesale & retail | 2022 |
| Meadow Farm Properties Limited | Real estate | 2024 |
| Meadow Vale (Littleover) Management Company Limited | Households | 2006 |
| Meadow Vale Court Management Company Limited | Households | 2023 |
| Meadowbrook Garage Limited | Manufacturing | 2011 |
| Meadowcourt Consultancy Limited | Professional & scientific | 2017 |