| MUV Enterprise Limited | Professional & scientific | 2025 |
| MVB Autos Ltd | Wholesale & retail | 2024 |
| MVC Ltd | Professional & scientific | 2002 |
| MW (Aspirations) Ltd | Health & social care | 2024 |
| MW Foundation CIC | Health & social care | 2024 |
| MW Technical Services Limited | Administrative & support | 2003 |
| MW188 Ltd | Real estate | 2025 |
| Mwkgf Ltd | Wholesale & retail | 2021 |
| MXA Services Ltd | Transport & logistics | 2019 |
| My Activities Limited | Arts & recreation | 2008 |
| My Choice Taxis Ltd | Transport & logistics | 2024 |
| My Fone World Ltd | Wholesale & retail | 2014 |
| My Furry Friends Ltd | Other services | 2020 |
| My Services Network Ltd | Administrative & support | 2025 |
| Myway Estates Ltd | Real estate | 2024 |
| N & a Watton Logistics Limited | Transport & logistics | 2011 |
| N & M Narrow Boats Limited | Transport & logistics | 1958 |
| N C Plant Hire Limited | Transport & logistics | 2021 |
| N Goodman Associates Ltd | Professional & scientific | 2010 |
| N R P S Limited | Energy | 2007 |
| N&T Investments Limited | Professional & scientific | 2016 |
| Nafi Consultants Limited | Construction | 2025 |
| Nagouna Technologies Ltd | Transport & logistics | 2025 |
| Naked Accounting Ltd | Professional & scientific | 2012 |
| Nala Care Solutions Ltd | Health & social care | 2025 |
| Nala's Kitchen Ltd | Hospitality | 2025 |
| Napoli Foods Ltd | Hospitality | 2024 |
| Nasul Ltd | Transport & logistics | 2020 |
| NAT Consulting Limited | Professional & scientific | 2022 |
| Nathwanifuturestrading Ltd | Financial services | 2023 |
| National Nursery Training Limited | Education | 2017 |
| Nationwide Energy Consultants Limited | Extraterritorial | 2015 |
| Nationwide Energy Consultants Utilities Ltd | Professional & scientific | 2001 |
| Nationwide Media Ltd | Information & communication | 2023 |
| Nationwide Payments Limited | Financial services | 2021 |
| Nationwide Truck Services Limited | Transport & logistics | 2012 |
| Natural Nurture Children's Home Ltd | Professional & scientific | 2017 |
| Natural Oriental Rehab Ltd | Health & social care | 2019 |
| Naturals CLO Limited | Wholesale & retail | 2019 |
| Navjohal Properties Ltd | Real estate | 2024 |
| NB Recruiting Ltd | Administrative & support | 2023 |
| Nbpr Kitchens Ltd | Wholesale & retail | 2023 |
| NCC HCT Limited | Professional & scientific | 2025 |
| NCP Garden Services Ltd | Manufacturing | 2024 |
| NCS Floors Direct Ltd | Wholesale & retail | 2013 |
| NCT Eduprint Ltd | Manufacturing | 2024 |
| NDI Consulting Limited | Administrative & support | 2005 |
| NDK Cleaning Services Limited | Administrative & support | 2025 |
| NDP Parts Ltd | Wholesale & retail | 2023 |
| NEA Contracts Limited | Construction | 2013 |
| Neate Transport Ltd | Transport & logistics | 2025 |
| Neburise Ltd | Information & communication | 2024 |
| NEC Transport Limited | Transport & logistics | 2025 |
| NEED4TOOL Ltd | Wholesale & retail | 2026 |
| Needham Commercial Insurance Services Limited | Financial services | 2007 |
| Neil Corden Limited | Professional & scientific | 2007 |
| Neil Underhill Building Services Ltd | Construction | 2018 |
| Nein Aura Ltd | Manufacturing | 2024 |
| Nekan Superstore Ltd | Wholesale & retail | 2018 |
| Nello Service Limited | Manufacturing | 2014 |
| Nelovy Healthcare Ltd | Manufacturing | 2016 |
| Nelson Home Investments Ltd | Real estate | 2015 |
| NEO21 Ltd | Transport & logistics | 2025 |
| Nepali Ghar Apartment Ltd | Real estate | 2025 |
| Nepaw Limited | Administrative & support | 2009 |
| Nest Protected Limited | Administrative & support | 2017 |
| Nestco Holdings Ltd | Financial services | 2020 |
| Netium Properties Limited | Real estate | 2022 |
| Netradyne UK Private Limited | Wholesale & retail | 2024 |
| Netriva Investment Limited | Real estate | 2023 |
| Netriva Services Ltd | Information & communication | 2022 |
| Network Courier Solutions Ltd | Transport & logistics | 2011 |
| Network Safety Systems Limited | Professional & scientific | 2026 |
| Neuromed Clinic Limited | Health & social care | 2020 |
| Neverland Digital Entertainment Ltd. | Information & communication | 2021 |
| Nevin Roofing and Property Development Limited | Construction | 2024 |
| New Build Windows Direct Ltd | Construction | 2022 |
| New Drives & Landscapes Limited | Administrative & support | 2024 |
| New Drives the Driveway Company Limited | Administrative & support | 2024 |
| New Farm Christmas Trees Limited | Wholesale & retail | 2014 |
| New Green Beans 2024 Ltd | Hospitality | 2024 |
| New Horizon Enterprises Limited | Wholesale & retail | 2026 |
| New House Farm Residents Association Limited | Households | 2015 |
| New Looks Barber Ltd | Other services | 2023 |
| New Oriental Hot Food Ltd | Hospitality | 2024 |
| New Peking Food Limited | Hospitality | 2026 |
| New View Landscaping Limited | Administrative & support | 2018 |
| New Vision Education Service Ltd | Administrative & support | 2016 |
| New Wave Snacks Ltd | Professional & scientific | 2026 |
| Newborough Design Limited | Professional & scientific | 1989 |
| Newdigate Builders Contracts Limited | Construction | 2010 |
| Newdigate Builders Limited | Construction | 2010 |
| Newleaf Drives and Landscapes Ltd | Administrative & support | 2023 |
| Newry Group Ltd | Transport & logistics | 2023 |
| Newton Davis Trustees Limited | Financial services | 2002 |
| Nexa Physio Limited | Other services | 2024 |
| Nexgen Motors Ltd | Wholesale & retail | 2022 |
| Nexgeneration Limited | Hospitality | 2018 |
| Next GEN Scaffold and Access Ltd | Construction | 2025 |
| Next Point Coaching Ltd | Education | 2026 |