| Muhammadyounisbalochi Ltd | Wholesale & retail | 2025 |
| Mullis & Peake Limited | Extraterritorial | 2007 |
| Multipli Energy Ltd | Energy | 2026 |
| Mummy Mitts Ltd | Wholesale & retail | 2006 |
| Mumtaz Traders Ltd | Transport & logistics | 2020 |
| Mungai Ltd | Health & social care | 2021 |
| Munro Associates (UK) Limited | Professional & scientific | 2001 |
| Munshi Properties Limited | Real estate | 2007 |
| Murat Yildirim Limited | Wholesale & retail | 2025 |
| Murphy Co. REC Ltd | Administrative & support | 2025 |
| Murtaza Sons & Co Ltd | Wholesale & retail | 2024 |
| Muru Limited | Wholesale & retail | 2005 |
| Murvin Analytics Ltd | Information & communication | 2024 |
| Musa International Limited | Administrative & support | 2026 |
| Musdija Ltd | Health & social care | 2020 |
| Music Maze Limited | | 1990 |
| Music N Chilli Productions | | 2007 |
| Muslim Women's Welfare Association Limited | Professional & scientific | 1999 |
| MV Optical Ltd | Health & social care | 2021 |
| MW Property Services Ltd | Real estate | 2003 |
| MWS Consultancy Limited | Information & communication | 2006 |
| Mxel Ltd | Wholesale & retail | 2023 |
| My Cleaning Solutions Ltd | Administrative & support | 2023 |
| My Confident Steps Ltd | Wholesale & retail | 2024 |
| My Ecommerce Gallery Ltd | Wholesale & retail | 2025 |
| My Kind a Patty Limited | Hospitality | 2010 |
| My Studio AI Ltd | Wholesale & retail | 2025 |
| Myrg Property Ltd | Real estate | 2026 |
| Mywish PTY Limited | Wholesale & retail | 2025 |
| MZG Consultancy Ltd | Professional & scientific | 2026 |
| Mzim Enterprise Ltd | Information & communication | 2023 |
| MZR Management Ltd | Administrative & support | 2013 |
| N 7 Limited | Administrative & support | 2002 |
| N Anderson Metal Recycling Limited | Wholesale & retail | 2006 |
| N C N (Property Development and Management) Limited | Real estate | 1990 |
| N Copsey & Sons Freight Services Limited | Transport & logistics | 2002 |
| N D Osborne & Co Limited | Construction | 1997 |
| N Naqvi Services Ltd | Health & social care | 2023 |
| N Pharm Limited | Other services | 2015 |
| N V C Durris Ltd | Construction | 2000 |
| N&M Global Ltd | Wholesale & retail | 2025 |
| N.D. Smith (Contracts) Limited | Construction | 1992 |
| N.G. Developments Limited | Hospitality | 1983 |
| N.Yeomans & Co.(Frinton)Limited | Professional & scientific | 1961 |
| Naak Horda Ltd | Construction | 2025 |
| Nabours International Ltd | Wholesale & retail | 2025 |
| NAC Products Limited | Wholesale & retail | 2006 |
| Nadeem Online Sales Ltd | Wholesale & retail | 2025 |
| Nadir Ltd | Hospitality | 2015 |
| Nagina Global Limited | Wholesale & retail | 2026 |
| Nagraeli Limited | Health & social care | 2023 |
| Nali 2015 Ltd | Hospitality | 2018 |
| Namaa Ventures Ltd | Financial services | 2023 |
| Namse Ltd | Wholesale & retail | 2024 |
| Nancel Ltd | Health & social care | 2024 |
| Nanor Limited | Health & social care | 2024 |
| Nanosoft Innovations Ltd | Information & communication | 2024 |
| Narl Limited | Real estate | 2025 |
| Narland Limited | Wholesale & retail | 1999 |
| Nasco Global Consulting Ltd | Professional & scientific | 2019 |
| Natalie's Salon Limited | Other services | 2007 |
| Nationwide Plans Ltd | Construction | 2018 |
| Nationwide Property Relocations Ltd | Hospitality | 2025 |
| Nationwide Surveys Limited | Construction | 1989 |
| Natrinza Ceramics Ltd | Health & social care | 2005 |
| Natsicza Ltd | Information & communication | 2024 |
| Natura Medicom Limited | Wholesale & retail | 2024 |
| Natural Aura Limited | Wholesale & retail | 2024 |
| Natural Selections Limited | Agriculture & fishing | 2001 |
| Nature's Healthcare UK Ltd | Wholesale & retail | 2025 |
| Nautical Capital Holdings Limited | Financial services | 2026 |
| Navarre Transport Services Limited | Transport & logistics | 2000 |
| Naveed Trader Ltd | Wholesale & retail | 2025 |
| Nawaal Collections Ltd | Manufacturing | 2023 |
| Naya Leather Ltd | Manufacturing | 2021 |
| Nayaab Enterprises Limited | Wholesale & retail | 2001 |
| Nazims 1 Ltd | Real estate | 2023 |
| Nazmafk (UK) Ltd | Professional & scientific | 2003 |
| NB: Flowers!! Limited | Other services | 2007 |
| NC Properties Limited | Real estate | 1994 |
| NC Trading Group Limited | Wholesale & retail | 2025 |
| Ncuda Limited | Other services | 2005 |
| NDC Technologies Limited | Manufacturing | 1959 |
| Ndgame Limited | Wholesale & retail | 2002 |
| Neaj Ltd | Health & social care | 2022 |
| Neal James Photography Limited | Professional & scientific | 2004 |
| Neatest Ltd | Wholesale & retail | 2026 |
| Nebula Hawk Limited | Information & communication | 2007 |
| Nehan Traders Limited | Wholesale & retail | 2021 |
| Nehir Limited | Wholesale & retail | 2011 |
| Neil Davis Glass Limited | Construction | 2007 |
| Neil Rosen Bridge Ltd | Arts & recreation | 2007 |
| Neill's Limited | Wholesale & retail | 2012 |
| Neke Properties Limited | Construction | 2002 |
| Nelcessities Ltd | Other services | 2025 |
| Nelco Contracts Ltd | Construction | 2017 |
| Nelem Ltd | Construction | 2018 |
| Nellycosmetice Limited | Wholesale & retail | 2024 |
| Nelmes Garage Limited | Wholesale & retail | 1962 |
| Nelstar Management Ltd | Real estate | 2004 |