| Milverdex Properties Limited | Real estate | 2024 |
| Minibot Graphics Ltd | Professional & scientific | 2019 |
| Minicross Drivers Association Limited | Arts & recreation | 2008 |
| Mint Fire Systems Ltd | Administrative & support | 2021 |
| Mint Security Systems Limited | Administrative & support | 2011 |
| Mint Transport Limited | Transport & logistics | 2016 |
| Miplo. LLP | | 2025 |
| Miraheze Limited | Information & communication | 2019 |
| Mirza Sons Ltd | Wholesale & retail | 2025 |
| Misterton Holdings Limited | Financial services | 2012 |
| Mitchell & Sons Haulage Ltd | Transport & logistics | 2025 |
| Mitchell Homes Northern Ltd | Construction | 2024 |
| MJW Production Ltd | Information & communication | 2022 |
| MK Global Trading Ltd | Wholesale & retail | 2015 |
| ML & LC Company Ltd | Professional & scientific | 2021 |
| MLV Mobility Ltd | Wholesale & retail | 2022 |
| MMG Sports, Prestige & 4X4 Ltd | Extraterritorial | 2023 |
| Mollywood Boutique Ltd | Wholesale & retail | 2021 |
| Monique Beautician and Trainer Limited | Other services | 2025 |
| Monksway Properties Limited | Real estate | 2017 |
| MOO LAB S80 Ltd | Hospitality | 2020 |
| Mooangel Ltd | Manufacturing | 2021 |
| Moon Burger Limited | Hospitality | 2021 |
| Moore (Blyth) Limited | Agriculture & fishing | 2012 |
| Moos Sweets and Chews Ltd. | Hospitality | 2020 |
| Morley Decorating Limited | Construction | 2013 |
| Motors in Motion Limited | Wholesale & retail | 2011 |
| Mount View Homes Ltd | Real estate | 2024 |
| Moviquip Limited | Transport & logistics | 2026 |
| MPB Consultancy Ltd | Information & communication | 2025 |
| MR Driving School Limited | Education | 2019 |
| MR Mile Ltd | Transport & logistics | 2022 |
| MRP Holdings (Midlands) Limited | Financial services | 2024 |
| MRP Property (Midlands) Limited | Real estate | 2024 |
| Mrproptectionservicesgroup Ltd | Administrative & support | 2025 |
| MRS B Spibey (Stud Farm Elmton Partnership) | | 1985 |
| Mrsc Engineering Ltd | Construction | 2016 |
| MS Cars Worksop Limited | Wholesale & retail | 2014 |
| MSG Plumbing & Heating Ltd | Construction | 2023 |
| MTM (Catering) Ltd | Hospitality | 2008 |
| Mtrx Engineering Ltd | Manufacturing | 2025 |
| Mullens Construction Services Ltd | Wholesale & retail | 2024 |
| Mustard Seed Consulting Ltd | Information & communication | 2011 |
| Mutlow Property Holdings Limited | Real estate | 2016 |
| MVB Transport Ltd | Transport & logistics | 2022 |
| MVK Transport Ltd | Transport & logistics | 2024 |
| MW Maguire Holdings Limited | Professional & scientific | 2014 |
| Mwdb Homes Limited | Real estate | 2026 |
| My Housing Solutions Ltd | Real estate | 2024 |
| MY66 Limited | Transport & logistics | 2015 |
| Mystlabvape Ltd | Wholesale & retail | 2022 |
| N & C Pallets Limited | Administrative & support | 2004 |
| N & M a Properties Limited | Real estate | 2022 |
| N Glasby Electrical Contractors Limited | Construction | 2003 |
| N J Broxholme Ltd | Construction | 2022 |
| N R General Store Ltd | Wholesale & retail | 2025 |
| N. Ridley Builders Limited | Construction | 2008 |
| NAB Wood Software Limited | Information & communication | 2025 |
| Naila NAZ Rehan Ltd | Health & social care | 2019 |
| Najaf and Sons Limited | Health & social care | 2013 |
| Najmadin Mini Market Ltd | Wholesale & retail | 2026 |
| NAK Engineering Ltd | Professional & scientific | 2021 |
| Nardus Healthcare Ltd | Transport & logistics | 2022 |
| Nathan John Car & Van Sales Ltd | Wholesale & retail | 2022 |
| National Fluid Power Centre Ltd | Education | 1993 |
| National Kidney Federation | Health & social care | 2004 |
| Natures Coaching Limited | Administrative & support | 2008 |
| NB International Consultancy Ltd | Professional & scientific | 2023 |
| NBM Investments Limited | Extraterritorial | 2007 |
| Neil Clothier Consultancy & Training Ltd | Professional & scientific | 2021 |
| Nelson Electrical Services Ltd | Construction | 2026 |
| Nestmahal Limited | Real estate | 2024 |
| Nesuna Group Ltd | Financial services | 2022 |
| NET Geeks Ltd | Information & communication | 2015 |
| Network Blinds Limited | Manufacturing | 1992 |
| Neurolearn Limited | Information & communication | 2025 |
| New AGE Global Group Ltd | Professional & scientific | 2025 |
| New AGE Training Solutions Ltd | Education | 2026 |
| New Houghton 2025 Limited | Other services | 2026 |
| New Mandarin Palace Limited | Hospitality | 2013 |
| New Tech Lubes Limited | Manufacturing | 2002 |
| Newarktiler Ltd | Construction | 2021 |
| Newcastle House Management Company Limited | Households | 1986 |
| Newton Agro(Uk) Ltd | Agriculture & fishing | 2024 |
| Next Step Films Ltd | Information & communication | 2023 |
| Nextgen Learning Ltd | Education | 2026 |
| Nexus 360 Limited | Information & communication | 2024 |
| Nichols Engineering Services Limited | Professional & scientific | 2025 |
| Nicolaedumitrescu Ltd | Construction | 2025 |
| Nicolas Speed Ltd | Transport & logistics | 2026 |
| Nightingale Business Management Limited | Professional & scientific | 2004 |
| Nirmaan Estates Ltd | Real estate | 2025 |
| Nirmaan Floors Ltd | Construction | 2022 |
| Nirmaan Property Ltd | Construction | 2025 |
| Niten Ichi Ltd | Professional & scientific | 2025 |
| Nithu & Jali Ltd | Wholesale & retail | 2024 |
| NJB Contract Management Limited | Construction | 2015 |
| NKG Logistics Ltd. | Transport & logistics | 2014 |
| Nmjn Accountants Limited | Professional & scientific | 2015 |
| NMK Property LLP | | 2021 |