| MKW Contractors Ltd | Construction | 2023 |
| ML Batch Heaters HEX Ltd | Manufacturing | 2026 |
| ML Batch Heaters Limited | Manufacturing | 2013 |
| ML Consulting Limited | Professional & scientific | 2026 |
| ML Tree and Garden Solutions Limited | Administrative & support | 2018 |
| MLB Productions Ltd | Arts & recreation | 2023 |
| MLC03 Ltd | Wholesale & retail | 2024 |
| Mlcp Consultant Psychologists Limited | Health & social care | 1995 |
| MLG Property Development Limited | Households | 2025 |
| MLM Property Lettings Ltd | Real estate | 2025 |
| MLN Holdings Limited | Financial services | 2021 |
| Mlodyy Ltd | Transport & logistics | 2017 |
| MLS Ltd | Hospitality | 1997 |
| MLS Vedonis Limited | Construction | 2024 |
| MM Care Services Ltd | Health & social care | 2015 |
| MM Estates Derby Ltd | Financial services | 2020 |
| MM Fitting Ltd | Manufacturing | 2021 |
| MM Mortgages & Loans Ltd | Financial services | 2018 |
| Mm&M Properties Ltd | Real estate | 2022 |
| MMA Design (Derby) Limited | Professional & scientific | 2020 |
| MMA Design Limited | Professional & scientific | 2001 |
| MMA786 Limited | Hospitality | 2025 |
| Mmarm Limited | Information & communication | 2015 |
| Mmason Ltd | Manufacturing | 2022 |
| MMBS2019 Ltd | Financial services | 2023 |
| MMD Design and Consultancy Ltd | Professional & scientific | 1978 |
| MMD Mineral Sizing (Europe) Ltd | Professional & scientific | 1979 |
| Mmdt Consulting Limited | Information & communication | 2014 |
| Mmeu Limited | Professional & scientific | 2006 |
| MMH Optics Ltd | Health & social care | 2022 |
| MMI Constructions Midland Ltd | Construction | 2024 |
| MMK Nails Ltd | Other services | 2023 |
| MML Technology Limited | Professional & scientific | 2011 |
| Mmmp Haulage Ltd | Transport & logistics | 2014 |
| Mmmp Real Estate Ltd | Real estate | 2025 |
| Mmpa Services Ltd | Professional & scientific | 2026 |
| MMT Performance Ltd | Wholesale & retail | 2018 |
| MN Podiatry Limited | Health & social care | 2025 |
| MNH Derby Limited | Transport & logistics | 2024 |
| MNI Properties Limited | Real estate | 2022 |
| Mnisi Property Investment Limited | Financial services | 2025 |
| MNK Haulage Ltd | Transport & logistics | 2017 |
| MNL Holdings Limited | Financial services | 2022 |
| MNM INT Limited | Transport & logistics | 2025 |
| Mntm IT Solutions Ltd | Information & communication | 2025 |
| Mo's Barbering Services Ltd | Other services | 2023 |
| MO2 Construction Ltd | Construction | 2023 |
| MOB Holiday Lets Limited | Real estate | 2020 |
| MOB Property Limited | Real estate | 2017 |
| Mobile Center Limited | Wholesale & retail | 2025 |
| Mobile Engineering Ltd | Manufacturing | 2024 |
| Mobile Foot Care (East Midlands) Ltd | Health & social care | 2026 |
| Mobile Games Exchange Limited | Wholesale & retail | 2011 |
| Mobile Hub Derby Limited | Wholesale & retail | 2020 |
| Mobile OIL Solutions Ltd | Wholesale & retail | 2019 |
| Mobile Rolling Road Ltd | Wholesale & retail | 2023 |
| Mobile Solutions (UK) Limited | Wholesale & retail | 2000 |
| Mobile Sports Therapy Ltd | Health & social care | 2011 |
| Mobile Tech Intl Limited | Wholesale & retail | 2017 |
| Mobile Vision Ltd | Wholesale & retail | 2023 |
| MOBILE2MONEY Ltd | Wholesale & retail | 2025 |
| Moby Dick Scooters Limited | Wholesale & retail | 2001 |
| Mocare Health Care Limited | Health & social care | 2015 |
| Mode Services Ltd | Wholesale & retail | 2025 |
| Modern 606 Limited | Hospitality | 2023 |
| Modern Living Spaces Ltd | Real estate | 2024 |
| Modern Miss Limited | Other services | 2002 |
| Modes Users Association | Arts & recreation | 1997 |
| Modula Electrical Ltd | Construction | 2021 |
| Modular Garden Design Ltd | Administrative & support | 2023 |
| Modulus Living Ltd. | Real estate | 2022 |
| Modz Stop Ltd | Wholesale & retail | 2026 |
| Moel Properties Ltd | Real estate | 2017 |
| Moez Retail Ltd | Wholesale & retail | 2026 |
| Mofarag Limited | Health & social care | 2023 |
| Mofoods UK Ltd | Wholesale & retail | 2017 |
| Moggs Marketing Communications Limited | Professional & scientific | 2003 |
| Mogul Derby Ltd | Hospitality | 2026 |
| Mogul Gold Ltd | Hospitality | 2025 |
| Mohain-Phull Limited | Information & communication | 2017 |
| Mohammed Arfaq Limited | Financial services | 2012 |
| Mojo Propco Limited | Real estate | 2022 |
| Moko Physiotherapy Ltd | Health & social care | 2021 |
| Mokusokarateacademy Ltd | Education | 2022 |
| Mola Mola Holdings Limited | Financial services | 2024 |
| Molan 0303 Ltd. | Professional & scientific | 2000 |
| Mole & Joseph Property Group Limited | Real estate | 2025 |
| Molesworth Homes Ltd | Real estate | 2024 |
| Moley's Ltd | Construction | 2018 |
| Mollie Clulow Ltd | Professional & scientific | 2020 |
| Momentic Limited | Professional & scientific | 2013 |
| Momineral International Ltd. | Wholesale & retail | 2015 |
| Momineral UK Ltd. | Manufacturing | 2014 |
| Monacre Consulting Limited | Professional & scientific | 2023 |
| Monaghan Investments Limited | Professional & scientific | 2013 |
| Monaprop Ltd | Extraterritorial | 2025 |
| Monarch Aesthetics and Skin Care Ltd | Other services | 2021 |
| Monarch Developments (Midlands) Ltd | Administrative & support | 2017 |
| Monarch Holdings Group Limited | Financial services | 2023 |
| Monarch Mode Limited | Wholesale & retail | 2025 |