| Nelson Park Care Limited | Health & social care | 2026 |
| Nelumbo Consultancy Limited | Information & communication | 2014 |
| Nemorosa Ltd | Professional & scientific | 2025 |
| NEO Property Developments Limited | Construction | 2023 |
| Neoretro Ltd | Administrative & support | 2019 |
| Neosave Events Limited | Education | 2017 |
| Neosave Neonatal Training Limited | Education | 2014 |
| Nepal Jewellers UK Limited | Wholesale & retail | 2022 |
| Nepalese Gurkha Work Force Ltd | Construction | 2026 |
| Nepalese Kent Cleaning Services Ltd | Administrative & support | 2023 |
| Neptune Contractors Ltd | Construction | 2026 |
| Nero Competitions Limited | Wholesale & retail | 2023 |
| Nest Furniture Studio Ltd | Wholesale & retail | 2019 |
| Nest Land Management Ltd | Agriculture & fishing | 2022 |
| Nest Marketing Limited | Professional & scientific | 2009 |
| Neta Dining Club Limited | Hospitality | 2026 |
| Netg Services Ltd | Construction | 2019 |
| Netiv Consulting Limited | Administrative & support | 2020 |
| Netstone Global Limited | Information & communication | 2012 |
| Network 4 M Limited | Professional & scientific | 2003 |
| Network 79 Limited | Information & communication | 2004 |
| Networks AV Limited | Information & communication | 2003 |
| Neuroveda Limited | Health & social care | 2019 |
| Neutra Motor UK Ltd | Wholesale & retail | 2025 |
| NEV Homes Limited | Real estate | 2025 |
| Never Apart Ltd | Manufacturing | 2025 |
| New Appointments Group Limited | Professional & scientific | 2001 |
| New Automotive CIC | Professional & scientific | 2020 |
| New Buildings Limited | Construction | 2025 |
| New Duct Installations Ltd | Construction | 2007 |
| New Force Wrestling Ltd | Arts & recreation | 2020 |
| New Home Builder Limited | Construction | 2022 |
| New Land Options Limited | Wholesale & retail | 2017 |
| New London Gurkha Estates Ltd | Real estate | 2025 |
| New Look Shutters Ltd | Construction | 2024 |
| New Manor Golf Club Ashford Limited | Real estate | 1902 |
| New Marlborough Sushi Ltd | Wholesale & retail | 2021 |
| New Park Road Residents Management Limited | Households | 1999 |
| New Street Pizza Ltd | Hospitality | 2017 |
| New Tenterden Sushi Ltd | Wholesale & retail | 2024 |
| New Venture Models Ltd | Administrative & support | 2018 |
| New Vision Construction Limited | Construction | 2014 |
| New Vision Drives Ltd | Administrative & support | 2021 |
| New Way Living Ltd | Real estate | 2022 |
| New Window Solutions Ltd | Construction | 2026 |
| New World Builders (Surrey) Ltd | Construction | 2022 |
| New World Netcom Ltd | Information & communication | 2017 |
| New World Network Services Ltd | Information & communication | 2006 |
| Newark Bridge & Iron Ltd | Construction | 2017 |
| Newcastle Business Services Limited | Professional & scientific | 2005 |
| Newcastle Urology Limited | Health & social care | 2019 |
| Newstock Homes Ltd | Real estate | 2026 |
| Newtech Computers Limited | Information & communication | 1995 |
| Newtime Technology Limited | Information & communication | 1998 |
| Newway Analytics Ltd | Information & communication | 2021 |
| Nexacore Solutions Ltd | Information & communication | 2026 |
| Next Level Energy Solutions Limited | Construction | 2026 |
| Next Level Flooring Limited | Construction | 2019 |
| Next Research Limited | Information & communication | 2011 |
| Next Stop London Holdings Ltd | Professional & scientific | 2021 |
| Next Stop London Ltd | Real estate | 2021 |
| Nextcare Trading Ltd | Wholesale & retail | 2026 |
| Nextgen Property Ltd | Real estate | 2019 |
| Nexus Network Solutions Ltd | Administrative & support | 2026 |
| Nexus Programme Limited | Health & social care | 1999 |
| Nexus SHL LLP | | 2011 |
| Nexus Tours Limited | Administrative & support | 2024 |
| NFW Ashford Kebab Ltd | Hospitality | 2024 |
| NFW the Best Cafe Ltd | Hospitality | 2021 |
| Ngaoscouk Ltd | Wholesale & retail | 2021 |
| NGC Maintenance Ltd | Construction | 2025 |
| NGI Lift Services Limited | Manufacturing | 2022 |
| NGS Tractors Ltd | Manufacturing | 2025 |
| NGU PUB Group Ltd | Hospitality | 2022 |
| NH New Hotel Limited | Financial services | 2004 |
| Nice! by Paul Brew Ltd. | Hospitality | 2017 |
| Nicholas Ford Limited | Construction | 2002 |
| Nicholas Harris Interiors Limited | Professional & scientific | 1994 |
| Nichols Carpentry and Services Limited | Construction | 2025 |
| Nick Booth Electrical Contractors Ltd | Construction | 2024 |
| Nick Sweeney Property Consultants Ltd | Administrative & support | 2009 |
| Nickscauldron Limited | Wholesale & retail | 2007 |
| Nicola's Little Stars Limited | Arts & recreation | 2023 |
| Nigel Jeffries Landscapes Limited | Administrative & support | 2002 |
| Nigel Mcgee Limited | Information & communication | 2021 |
| Nightingale Holdings (Dover) Limited | Professional & scientific | 1978 |
| Nightingale Holidays Limited | Real estate | 2000 |
| NIK 7103 Limited | Transport & logistics | 2020 |
| NIK Hairdressing Ltd | Other services | 2021 |
| Nikentech Consulting Limited | Information & communication | 2025 |
| Nikki Bishop Ltd | Administrative & support | 2025 |
| Nikki Consulting Limited | Information & communication | 2014 |
| Nimota Ltd | Real estate | 2022 |
| Nimrat Builders Limited | Construction | 2021 |
| Nims Pharma Ltd | Health & social care | 2022 |
| Nina K Ltd | Other services | 2021 |
| Ninaraj PVT Limited | Health & social care | 2013 |
| Nine Yards Films Limited | Administrative & support | 2023 |
| Ninja Design Thinking Ltd | Professional & scientific | 2017 |
| Ninth Underworld Limited | Information & communication | 2014 |