| Modesit Ltd | Information & communication | 2008 |
| Mohammad Mojumder Ltd | Health & social care | 2022 |
| Moisa Remus Construction Ltd | Construction | 2021 |
| Mojola Limited | Health & social care | 2022 |
| Mokhei Limited | Public administration | 2023 |
| Mon-Choisy Homes Ltd | Public administration | 2025 |
| Monameè Hair UK Ltd | Other services | 2024 |
| Montague Purfleet Property Ltd | Real estate | 2025 |
| Montclares Investments Ltd | Real estate | 2023 |
| Monzo Mart Limited | Wholesale & retail | 2026 |
| Moon Style Apparel Ltd | Wholesale & retail | 2025 |
| Moorelight Electrical Services Ltd | Construction | 2025 |
| Morphitis Ltd | Other services | 2021 |
| Mortgage Magic Limited | Financial services | 2025 |
| Mortgage Magick Ltd | Information & communication | 2019 |
| Mortgagevista Limited | Financial services | 2025 |
| Mosaic Asphalte Supplies Limited | Professional & scientific | 1981 |
| Mosif and Sons Enterprise Ltd | Health & social care | 2024 |
| Mossberg Dynamics Ltd | Manufacturing | 2026 |
| MOT Essex Limited | Wholesale & retail | 2021 |
| Motele Ltd | Real estate | 2025 |
| Moto Consult Ltd. | Information & communication | 2011 |
| Motodan Automotives Limited | Wholesale & retail | 2018 |
| Motodan Fleet Limited | Administrative & support | 2026 |
| Motor Empire Ltd | Wholesale & retail | 2021 |
| Motors HUT Ltd | Wholesale & retail | 2025 |
| Motorz Ltd | Wholesale & retail | 2022 |
| Mottingham House Ltd | Construction | 2022 |
| Movic CIC | Health & social care | 2024 |
| Movin' Custom Ltd | Wholesale & retail | 2022 |
| Mowake Stores Limited | Hospitality | 2025 |
| Mphp Limited | Other services | 2021 |
| MPK Construction Ltd | Construction | 2022 |
| MPL PAY Ltd | Construction | 2025 |
| Mpride Social Work Ltd | Health & social care | 2021 |
| MPS Vent Solution Ltd | Construction | 2019 |
| MR Basement Ltd | Construction | 2020 |
| MR Flow Limited | Construction | 2023 |
| MR T’S Bootcamp Ltd | Other services | 2025 |
| MRC Trans Speed Ltd | Transport & logistics | 2024 |
| MRM Homes Ltd | Construction | 2026 |
| MRZ Consultancy Ltd | Professional & scientific | 2024 |
| MS & SV Limited | Health & social care | 2025 |
| MS Interiors Ltd | Construction | 2016 |
| MS Invest Limited | Wholesale & retail | 2020 |
| MS Isha Ltd | Information & communication | 2013 |
| MS Transport Services Ltd | Transport & logistics | 2023 |
| Msac Limited | Real estate | 2014 |
| MSH Entertainment Ltd | Arts & recreation | 2025 |
| Mshs Property UK Ltd | Real estate | 2025 |
| MSN Plumbing and Heating Ltd | Construction | 2025 |
| MSR 27 Limited | Hospitality | 2026 |
| Mstan Ltd | Construction | 2023 |
| Mtzion Limited | Real estate | 2017 |
| Mulberry Vastu Investments Ltd | Real estate | 2019 |
| Mumma & Bubba (MAN) Limited | Other services | 2013 |
| Mural Services Ltd | Construction | 2018 |
| Murat Barbers Ltd | Other services | 2025 |
| Musa.Haroon Limited | Wholesale & retail | 2026 |
| Mushroom Technologies Limited | Information & communication | 2016 |
| MV & VS Limited | Hospitality | 2025 |
| MV Clothing Ltd | Water & waste | 2014 |
| MV Profixer Ltd | Construction | 2016 |
| Mvmr Consulting Ltd | Professional & scientific | 2025 |
| Mwesigwa Limited | Health & social care | 2013 |
| MWG Property Limited | Real estate | 2025 |
| MX Boutique Limited | Wholesale & retail | 2023 |
| Mxlondon Fashion Ltd | Wholesale & retail | 2026 |
| My Food Grove Ltd | Administrative & support | 2017 |
| My Group Inc Limited | Financial services | 2021 |
| My Hapii Limited | Wholesale & retail | 2022 |
| Myles and Smiles Services Ltd | Real estate | 2018 |
| Mytotality Ltd | Wholesale & retail | 2022 |
| Myutilitygenius Commercial Limited | Administrative & support | 2013 |
| Myutilitygenius Limited | Information & communication | 2012 |
| N ZIA Ltd | Real estate | 2023 |
| N&N Foods Limited | Wholesale & retail | 2025 |
| N&R Just Shop Ltd | Wholesale & retail | 2025 |
| N&R Prime Trading Ltd | Wholesale & retail | 2026 |
| N.Samuel Holdings Limited | Real estate | 2024 |
| Nadeem N Co Limited | Other services | 2018 |
| Najah Home Ltd | Real estate | 2025 |
| Nakx Limited | Wholesale & retail | 2025 |
| Nandrinest Ltd | Wholesale & retail | 2025 |
| Nanny Maxos Limited | Health & social care | 2022 |
| Nasam Logistics Ltd | Transport & logistics | 2023 |
| National PAY Ltd | Financial services | 2024 |
| Nationwide Mobile Windscreens Limited | Extraterritorial | 2015 |
| Native & Spring Ltd | Manufacturing | 2025 |
| Native Homes Properties Ltd | Real estate | 2022 |
| Nativegate Limited | Information & communication | 2014 |
| Natnic Limited | Real estate | 2026 |
| Nawab Product Limited | Information & communication | 2025 |
| Nazra Amin Group Ltd | Real estate | 2020 |
| Need Contractors Ltd | Construction | 2022 |
| Neeraj Properties Ltd | Real estate | 2024 |
| Negara Invest Ltd | Real estate | 2025 |
| Neija Limited | Professional & scientific | 2022 |
| Neptune 1964 Limited | Extraterritorial | 2014 |
| Ness and ME Ltd | Wholesale & retail | 2022 |