| Muller Cleobury Mortimer Limited | Extraterritorial | 1999 |
| Muller England Limited | Manufacturing | 1982 |
| Muller Holdings Limited | Manufacturing | 1993 |
| Muller Precision Limited | Manufacturing | 2017 |
| Muller Redditch Limited | Manufacturing | 1971 |
| Muller South Wales Limited | Extraterritorial | 1979 |
| Mummy and Monkey Ltd | Wholesale & retail | 2024 |
| Murat Cafe Ltd | Hospitality | 2023 |
| Muscle Junkie Limited | Wholesale & retail | 2020 |
| MVW Solutions Ltd | Real estate | 2025 |
| MW Equipment Ltd | Administrative & support | 2022 |
| MX3 Software and Consulting Ltd | Information & communication | 2021 |
| My Sports Analysis Limited | Education | 2018 |
| My Steps (Support to Enhance Personal Skills) Ltd | Health & social care | 2019 |
| My Tribal Passion Limited | Professional & scientific | 2020 |
| My Utility Savings Limited | Professional & scientific | 2021 |
| Mybody-Fit Limited | Arts & recreation | 2021 |
| Mydis Ltd | Other services | 2020 |
| Mylk Studios Limited | Wholesale & retail | 2025 |
| Mymo Art Limited | Manufacturing | 2024 |
| N & G Building Limited | Construction | 2016 |
| N.E.E. (Exhibition Electrics) Limited | Construction | 1981 |
| N.N Care Limited | Health & social care | 2022 |
| NA Chambers Limited | Professional & scientific | 2025 |
| NAC Exhibitions Ltd | Administrative & support | 2026 |
| Nadz Foods Ltd | Hospitality | 2025 |
| Nail House Midlands Limited | Other services | 2024 |
| Nalvic Developments Limited | Construction | 1999 |
| Nalvic Limited | Extraterritorial | 1989 |
| Nametab Engineering Ltd | Manufacturing | 2004 |
| Namos HUT Ltd | Hospitality | 2017 |
| Nash Business Systems Limited | Information & communication | 2012 |
| Natalie Susan Hobson Limited | Extraterritorial | 2024 |
| Natasha Walkden Property Advisor Limited | Professional & scientific | 2020 |
| National Tyre and Autofit Limited | Professional & scientific | 2015 |
| National Tyre Service Limited | Wholesale & retail | 1970 |
| Natius Property Group Ltd | Real estate | 2024 |
| Natural Nails RD Ltd | Other services | 2023 |
| Natural Wellbeing Limited | Extraterritorial | 2008 |
| Nawaz Property Group Ltd | Real estate | 2023 |
| Naxos Enterprises Limited | Professional & scientific | 2014 |
| NAZ & Sons Wholesale Limited | Wholesale & retail | 2022 |
| NB Bodycares Limited | Health & social care | 2014 |
| NBS Blindfitting Limited | Administrative & support | 2008 |
| NCN Health Consultancy Ltd | Health & social care | 2018 |
| NCS Catering Limited | Hospitality | 2019 |
| NED Homes Ltd | Real estate | 2020 |
| Needle & Tackle Company Limited | Professional & scientific | 1991 |
| Neemo Executive Travels Ltd | Transport & logistics | 2023 |
| Nell Watson Ltd | Professional & scientific | 2013 |
| Neom Engineering Limited | Construction | 2021 |
| Neom Industrial Ltd | Manufacturing | 2023 |
| Nessa Cooks Limited | Hospitality | 2024 |
| Nest & Nook Property Ltd | Real estate | 2024 |
| Nest Property Services (Midlands) Ltd | Households | 2023 |
| Nesta Redditch Limited | Other services | 2019 |
| Nestware Holdings Limited | Financial services | 2020 |
| Nestware Properties Limited | Real estate | 2007 |
| Netland Information Technology Ltd | Wholesale & retail | 2013 |
| Netontarget Limited | Information & communication | 2010 |
| Neurodiversity in Education CIC | Professional & scientific | 2023 |
| New Generation Signs Ltd | Construction | 2024 |
| New Napoli Ltd | Hospitality | 2025 |
| New Quay Cottages Ltd | Hospitality | 2025 |
| New Rectory Leisure Limited | Hospitality | 2015 |
| New Road Garage Limited | Administrative & support | 2002 |
| New Way Composites Limited | Wholesale & retail | 2023 |
| Newey Electrics Ltd | Construction | 2023 |
| Newform Windows Limited | Construction | 2010 |
| Newlands Caravan Park Limited | Real estate | 2014 |
| Newmount Management Ltd | Households | 2007 |
| Newtown Packaging Limited | Wholesale & retail | 1977 |
| Nexlio Ltd | Wholesale & retail | 2026 |
| Nexorex Ltd | Professional & scientific | 2019 |
| Nexsis Solutions Limited | Professional & scientific | 2019 |
| Next Generation Consultancy LLP | | 2012 |
| Next Generation Ltd | Administrative & support | 2021 |
| Next Step Housing Solutions Limited | Real estate | 2026 |
| Next Version Technologies Ltd | Information & communication | 2026 |
| Nextgen Bathrooms and Kitchens Limited | Construction | 2025 |
| Nextprint Ltd | Manufacturing | 2012 |
| Nexus 100 Holdings Ltd | Professional & scientific | 2021 |
| Nexus Accounting Soln Ltd | Professional & scientific | 2025 |
| Nexus Fleetcare Ltd | Wholesale & retail | 2025 |
| Nexus SIX Ltd | Administrative & support | 2020 |
| NFD Auto Ltd | Wholesale & retail | 2024 |
| NGF Investments Limited | Construction | 2026 |
| NHM Accountancy & Bookkeeping Limited | Professional & scientific | 2022 |
| NHM Accounts Limited | Professional & scientific | 2016 |
| NHM Bookkeeping Limited | Professional & scientific | 2022 |
| NHM Payroll & Pensions Limited | Professional & scientific | 2022 |
| Nice Home Joinery Ltd | Manufacturing | 2021 |
| Nicholls Carpentry Ltd | Construction | 2022 |
| Nicholson Jones Farming Limited | Agriculture & fishing | 1993 |
| Nicholson Jones Limited | Financial services | 1988 |
| Nicholson Jones Storage Ltd | Extraterritorial | 2020 |
| Nicoljula Ltd | Transport & logistics | 2024 |
| Nini Cris Trans Ltd | Transport & logistics | 2018 |
| Nixon Peterson Consulting Limited | Administrative & support | 2002 |
| NJW Projects Limited | Professional & scientific | 2017 |