| Mushtaq and Sons Holdings Limited | Financial services | 2025 |
| Musk Lane Holdings Ltd | Administrative & support | 2023 |
| MV Mechanical & Electrical Services Ltd | Construction | 2026 |
| MVH Investments Ltd | Real estate | 2016 |
| MW Consultancy & Services Ltd | Professional & scientific | 2024 |
| My Care Choice Limited | Health & social care | 2017 |
| My E-Pharmacare Limited | Wholesale & retail | 2018 |
| My Local Electrician Ltd | Construction | 2020 |
| My Local OFF Licence Ltd | Wholesale & retail | 2025 |
| My Skin Spa Ltd | Other services | 2017 |
| My UNI Journey Ltd | Education | 2025 |
| My Village Properties Ltd | Real estate | 2023 |
| Mycin Ltd | Real estate | 2023 |
| Mynase Ltd | Administrative & support | 2019 |
| Myunihomes Properties Limited | Real estate | 2017 |
| MZZ Trading Limited | Transport & logistics | 2024 |
| N & R Fuels Limited | Water & waste | 2011 |
| N B W Electrical Services Limited | Construction | 2018 |
| N Kendrick Cars Limited | Wholesale & retail | 2003 |
| N Rose Ltd | Construction | 2014 |
| N Simmons Barber Shop Ltd | Other services | 2014 |
| N Smith Carpentry & Upvc Services Limited | Construction | 2006 |
| N&T Logistics Ltd | Transport & logistics | 2025 |
| N-Vyro.Io Ltd | Information & communication | 2023 |
| N.A.B. Logistics Ltd | Transport & logistics | 2019 |
| N.D. Walters Carpets Limited | Construction | 2002 |
| N.Matharu Ltd | Health & social care | 2016 |
| Nacsa Limited | Administrative & support | 2023 |
| Naga Holdings Ltd | Financial services | 2023 |
| Nagah Properties Ltd | Real estate | 2024 |
| Nagpal Carriers Ltd | Transport & logistics | 2022 |
| Nagpal Logistics Ltd | Transport & logistics | 2023 |
| Nagpal Property Investments Ltd | Real estate | 2025 |
| Nahar Associates Ltd | Wholesale & retail | 2020 |
| Nails and Spa 96 Limited | Other services | 2024 |
| Nails Plus Beauty Chepstow Limited | Other services | 2006 |
| Nails Plus Limited | Other services | 2006 |
| NAILS4U Dudley Limited | Other services | 2026 |
| Najizith Ltd | Administrative & support | 2023 |
| Namelectric Ltd | Construction | 2015 |
| Naruma Essential Ltd | Wholesale & retail | 2026 |
| Nash Glass Group Limited | Extraterritorial | 2022 |
| Nash Glass Holdings Limited | Professional & scientific | 2016 |
| Nash Glass Limited | Construction | 1982 |
| Nash Vehicles Ltd | Administrative & support | 2018 |
| Nathan Cole Visual Communication Limited | Professional & scientific | 2009 |
| Nathan Warrilow Limited | Construction | 2023 |
| National CAB Care Ltd | Transport & logistics | 2019 |
| National Skills Academy for Private Security Industry CIC | Education | 2024 |
| Nature’S Harvest Ltd | Wholesale & retail | 2025 |
| Naughty BUT Nice Limited | Hospitality | 2025 |
| NAV Holdings and Investments Ltd | Financial services | 2024 |
| NAV Interiors Ltd | Manufacturing | 2024 |
| Nava Projects Limited | Financial services | 2026 |
| Naveedas Ltd | Hospitality | 2026 |
| Navigate Property Investments Ltd | Real estate | 2021 |
| Nawab Global Trading Limited | Wholesale & retail | 2025 |
| NCT Contractors Ltd | Construction | 2026 |
| Ndex Solutions Limited | Health & social care | 2023 |
| Neaqco Limited | Professional & scientific | 2015 |
| Neela Krishna Limited | Wholesale & retail | 2020 |
| Neelah Limited | Information & communication | 2010 |
| Neevanjee Limited | Health & social care | 2024 |
| Neighbourhood Hair Studio Ltd | Other services | 2021 |
| NEL Investments Limited | Financial services | 2013 |
| Nelson Parker Limited | Professional & scientific | 2007 |
| Nemo Promotions Limited | Information & communication | 2023 |
| Nenisi Care Services Ltd | Health & social care | 2020 |
| Neon Circuit Instruments Ltd | Manufacturing | 2025 |
| Neoncrystal Ltd | Transport & logistics | 2018 |
| Nero K-9 Security Ltd | Administrative & support | 2023 |
| Nestly Technologies Ltd | Information & communication | 2026 |
| Nestwell Construction Ltd | Construction | 2026 |
| Netherton Automotive Services Ltd | Wholesale & retail | 2020 |
| Netherton Bathroom and Plumbing Supplies Ltd | Wholesale & retail | 2017 |
| Netherton Conservative & Unionist Club Limited | Other services | 1913 |
| Netherton Mechanix Ltd | Wholesale & retail | 2026 |
| Netherton Service Centre Limited | Manufacturing | 2003 |
| Netsynx Ltd | Information & communication | 2021 |
| Network IT 24 Limited | Information & communication | 2011 |
| Nevil Bland Golf Ltd | Arts & recreation | 2025 |
| New Alisha (Tipton) Supermarket Ltd | Wholesale & retail | 2017 |
| New Armour Limited | Construction | 2018 |
| New Capital 168 Limited | Hospitality | 2022 |
| New Davo Barber Ltd | Other services | 2025 |
| New Dawn Care Agency Ltd | Health & social care | 2009 |
| New Delhi Limited | Hospitality | 2018 |
| New Heights Scaffolding Access Limited | Construction | 2025 |
| New INK Tattoo Studio Ltd | Professional & scientific | 2018 |
| New Jasmine Dudley Ltd | Hospitality | 2023 |
| New Path of Life CIC | Health & social care | 2016 |
| New ST Kurdish Barbers Ltd | Other services | 2025 |
| New Venture Homes Ltd | Construction | 2023 |
| Newbury Care Limited | Administrative & support | 2021 |
| Newey & Bloomer Limited | Wholesale & retail | 2004 |
| Newfield Capital Ltd | Real estate | 2026 |
| NEWJOB4YOU Ltd | Professional & scientific | 2018 |
| Newnham Court Farm Management Limited | Households | 2002 |
| News Shops Express Limited | Manufacturing | 2011 |
| Newton Pharma Limited | Wholesale & retail | 2023 |