| Maypas College Ltd | Education | 2024 |
| Mayprint Limited | Manufacturing | 2003 |
| Mays Chicken Limited | Hospitality | 2024 |
| Maysa Modest Wear Ltd | Wholesale & retail | 2025 |
| Maysam Family Ltd | Other services | 2020 |
| Maysen Futures Limited | Real estate | 2025 |
| Maysix AI Limited | Information & communication | 2023 |
| Maytas Projects Ltd | Professional & scientific | 2023 |
| Maytex Investments Limited | Manufacturing | 1998 |
| Mayway Construction Limited | Construction | 1990 |
| Maywright Shop Ltd | Wholesale & retail | 2022 |
| MAZ Spices Ltd | Wholesale & retail | 2025 |
| MAZ UK Trading Ltd | Wholesale & retail | 2022 |
| Maza PVT Ltd | Wholesale & retail | 2017 |
| Mazah Ltd | Hospitality | 2019 |
| Mazahir Taxis Ltd | Transport & logistics | 2022 |
| Maze Events & Training Services Ltd | Education | 2020 |
| Maze Land UK Ltd | Real estate | 2024 |
| Maze Menswear Limited | Wholesale & retail | 2001 |
| Mazecroft Construction Limited | Construction | 2007 |
| Mazecroft Properties Limited | Real estate | 2001 |
| Mazin Properties Ltd | Real estate | 2019 |
| Maznex Enterprises Ltd | Manufacturing | 2026 |
| Mazotos Ltd | Hospitality | 2020 |
| Mazz Investments Ltd | Financial services | 2016 |
| Mazzam Investments Ltd | Real estate | 2026 |
| MB Cafes Braehead Ltd | Hospitality | 2021 |
| MB Cafes Derby Ltd | Hospitality | 2021 |
| MB Cafes Holdings Ltd | Hospitality | 2021 |
| MB Cafes Kingsgate Ltd | Hospitality | 2021 |
| MB Cafes Limited | Wholesale & retail | 2001 |
| MB Corporate Ltd | Health & social care | 2023 |
| MB Creative Media Ltd | Professional & scientific | 2020 |
| MB Fencing Ltd | Construction | 2023 |
| MB Golf Limited | Wholesale & retail | 2019 |
| MB Haulage Ltd | Transport & logistics | 2021 |
| MB Heel Heal Limited | Manufacturing | 2025 |
| MB Home Improvements Limited | Construction | 2017 |
| MB Investment Ventures Ltd | Administrative & support | 2025 |
| MB Media and Marketing Ltd | Professional & scientific | 2026 |
| MB Motors Leicester Ltd | Wholesale & retail | 2018 |
| MB Neale Ltd | Financial services | 2019 |
| MB Sign Design Ltd | Extraterritorial | 2003 |
| MB Solutionz UK Ltd | Wholesale & retail | 2024 |
| MB Vehicle Contracts Ltd | Wholesale & retail | 2025 |
| MB Vehicle Services Leicester Ltd | Wholesale & retail | 2025 |
| MB Wakefield Property Limited | Real estate | 2023 |
| MB85 Consultancy Ltd | Information & communication | 2014 |
| MBA & MHA Ltd | Real estate | 2021 |
| MBA (UK) Limited | Manufacturing | 2009 |
| MBA Assets Limited | Real estate | 2022 |
| MBA Rentals Limited | Real estate | 2025 |
| Mbas Property Limited | Real estate | 2017 |
| MBB Optometry Ltd | Health & social care | 2023 |
| Mbbp Limited | Hospitality | 2024 |
| Mbchef Limited | Hospitality | 2020 |
| Mbcol Limited | Other services | 2005 |
| Mbelishe Concept Limited | Wholesale & retail | 2022 |
| Mbga Store Limited | Wholesale & retail | 2025 |
| MBI Investment Ltd | Real estate | 2023 |
| MBJ Transporters Limited | Manufacturing | 2025 |
| MBK Investments Ltd | Real estate | 2017 |
| Mbkr Limited | Real estate | 2019 |
| MBM Enterprises Limited | Manufacturing | 1995 |
| MBM Joinery Ltd | Construction | 2017 |
| MBM Property Development Ltd | Real estate | 2016 |
| MBM Trans Ltd | Transport & logistics | 2022 |
| MBP Ayur Limited | Manufacturing | 2025 |
| Mbrace Dental LAB Ltd | Health & social care | 2016 |
| MBZ Automation Limited | Manufacturing | 2023 |
| MC Automasters Ltd | Wholesale & retail | 2013 |
| MC China 288 Limited | Hospitality | 2022 |
| MC Chrystal's (Leicester) Limited | Manufacturing | 1954 |
| MC Electrical Services (Leicester) Ltd | Construction | 2013 |
| MC Froyo Ltd | Wholesale & retail | 2026 |
| MC N Tyres Auto-Centre Ltd | Other services | 2017 |
| MC Nominees Limited | Professional & scientific | 1996 |
| MC Pharma Ltd | Health & social care | 2014 |
| MC Social Ltd | Health & social care | 2023 |
| MC Strategic Solutions Limited | Professional & scientific | 2017 |
| Mc-Professional Hmua Limited | Other services | 2017 |
| MC117 Ltd | Financial services | 2025 |
| MC2 Services Limited | Other services | 2026 |
| MCA Properties & Investment Ltd | Real estate | 2020 |
| Mcal Legal and Consultancy Ltd | Professional & scientific | 2023 |
| Mcanenny Investments Limited | Financial services | 2024 |
| Mcardle-Jones Ltd | Health & social care | 2024 |
| MCB Knowles Limited | Transport & logistics | 2021 |
| Mcburger Ltd | Hospitality | 2017 |
| Mccarthy Heritage Ltd | Real estate | 2019 |
| Mcchrystal's Distribution Limited | Wholesale & retail | 2018 |
| Mccoffee Healthcare Ltd | Health & social care | 2026 |
| Mccook Consulting Ltd | Information & communication | 2024 |
| Mccv Property Ltd | Real estate | 2020 |
| Mcdermott Smith Contractors Ltd | Real estate | 2018 |
| Mcdermott Smith Limited | Construction | 2001 |
| Mcdermottproperty Ltd | Real estate | 2021 |
| Mcdon Ltd | Health & social care | 2022 |
| MCE Brooks Construction Ltd | Construction | 2022 |
| Mcenery Properties Limited | Households | 2022 |