| Natlynx Educ Ltd | Information & communication | 2025 |
| Natural Capital Technology Ltd | Information & communication | 2025 |
| Natural Moth Prevention Ltd | Wholesale & retail | 2020 |
| Naturallybeeyou Hair Studio Limited | Other services | 2024 |
| Nature Capital Buriton Ltd | Other services | 2024 |
| Nature's Nook Refillery Ltd | Wholesale & retail | 2024 |
| Nautech Ltd | Professional & scientific | 2025 |
| Nautic Dynamics Ltd | Manufacturing | 2025 |
| Nautical Circle Maritime Services Ltd | Education | 2024 |
| Nautor Swan Global Service UK Limited | Manufacturing | 2023 |
| Navaia Ltd | Professional & scientific | 2025 |
| Navdeep Construction Ltd | Construction | 2022 |
| Navico UK Limited | Administrative & support | 1956 |
| NAVIG8 Consultancy Services (UK) Limited | Administrative & support | 2021 |
| Navigation News Ltd | Wholesale & retail | 2017 |
| Navigators Way Residents Company Limited | Extraterritorial | 2007 |
| Navitas BI Limited | Information & communication | 2018 |
| Navix Transport Ltd | Transport & logistics | 2025 |
| Navjiya Ltd | Wholesale & retail | 2025 |
| Navunisei Logistics Ltd | Transport & logistics | 2025 |
| Navworks Ltd | Education | 2022 |
| Navyra Ltd | Information & communication | 2026 |
| Nayanest Ltd | Real estate | 2025 |
| Naylors (Properties) Limited | Real estate | 2012 |
| Nazca Management Ukeig | | 2008 |
| Nazia Jamil Ltd | Wholesale & retail | 2025 |
| Nazida Property Management Limited | Construction | 2025 |
| NB Pilates Limited | Education | 2019 |
| NB Property Services Southern Ltd | Construction | 2017 |
| NBC Electrical Contractors Ltd | Construction | 2009 |
| NBN24 Care Ltd | Health & social care | 2025 |
| Nboo Ltd | Manufacturing | 2026 |
| NBS Scientific Limited | Wholesale & retail | 2018 |
| Nchanted Aesthetics Clinic and Beauty Ltd | Other services | 2025 |
| NCL Trans Limited | Transport & logistics | 2025 |
| Ncollins Consulting Ltd | Information & communication | 2025 |
| ND Tackle Capital Ltd | Wholesale & retail | 2024 |
| Ndalama Services Limited | Health & social care | 2018 |
| Ndiidii Group of Companies Ltd | Wholesale & retail | 2022 |
| Ndoci Developments Ltd | Construction | 2026 |
| Ndoci Properties Limited | Real estate | 2023 |
| NDP4648 Ltd | Real estate | 2026 |
| Neacsiu Transport Ltd | Transport & logistics | 2019 |
| Neagu Services Limited | Administrative & support | 2016 |
| Neal L Millstein Limited | Professional & scientific | 2010 |
| Neal Spencer Homes Limited | Construction | 1993 |
| Neale Jones Limited | Other services | 2018 |
| Nearly New Crew Limited | Wholesale & retail | 2014 |
| Nebula Software Limited | Information & communication | 2018 |
| Nebulux Homes Limited | Real estate | 2024 |
| Necom Parcel Ltd | Transport & logistics | 2023 |
| Necord Limited | Professional & scientific | 2022 |
| Nectar World Private Limited | Wholesale & retail | 2020 |
| NED Carpentry Ltd | Construction | 2015 |
| Neeche Estates Ltd | Real estate | 2025 |
| Need Parking Limited | Transport & logistics | 2022 |
| Need Products Ltd | Wholesale & retail | 2020 |
| Needham Executor Services Ltd | Other services | 2011 |
| Needham North & Holywell Ltd | Professional & scientific | 2016 |
| Needlespar Management Limited | Households | 2008 |
| Needwell Limited | Information & communication | 2024 |
| Neeshwood Ltd | Other services | 2023 |
| NEH Project Consultancy Ltd | Professional & scientific | 2024 |
| Nehfresh Limited | Wholesale & retail | 2025 |
| Nehuen Limited | Professional & scientific | 2024 |
| Neighbour Engineering Limited | Professional & scientific | 2025 |
| Neil Cornish Media Ltd | Information & communication | 2012 |
| Neil Grubb Carpentry Ltd | Manufacturing | 2016 |
| Neil Jones Landscape and Garden Design Ltd | Professional & scientific | 2016 |
| Neil Kelso Productions Ltd | Arts & recreation | 2025 |
| Neil Rodger Limited | Wholesale & retail | 2013 |
| Neil Taylor Limited | Education | 1996 |
| Nelamont Limited | Extraterritorial | 2016 |
| Nelicare Health Professionals Ltd | Health & social care | 2026 |
| Neloe Cleaning Limited | Administrative & support | 2025 |
| Nelson Consulting Services Limited | Professional & scientific | 2018 |
| Nelson Kane Ltd | Households | 2026 |
| NEO Cars Ltd | Transport & logistics | 2019 |
| NEO Dragon Limited | Financial services | 2021 |
| NEO Media Signage Limited | Information & communication | 2013 |
| NEO Props Limited | Information & communication | 2013 |
| NEO Resourcing Group Ltd | Administrative & support | 2025 |
| Neocos Consulting Limited | Professional & scientific | 2010 |
| Neoeden Kadoma Ltd | Health & social care | 2021 |
| Neoland Travels Ltd | Administrative & support | 2024 |
| Neom Utilities Ltd | Wholesale & retail | 2024 |
| Neon & Blush Weddings & Events Limited | Other services | 2017 |
| Neona Property Limited | Real estate | 2025 |
| Neoric Ltd | Wholesale & retail | 2021 |
| Neovaya Ltd | Wholesale & retail | 2024 |
| Neptun Mart Ltd | Information & communication | 2025 |
| Neptune Canute RTM Company Limited | Households | 2013 |
| Neptune Exterior Cleaning Limited | Administrative & support | 2022 |
| Neptune Homes Ltd | Real estate | 2019 |
| Neptune Management (UK) Limited | Other services | 2014 |
| Neptune Outdoor Furniture Limited | Extraterritorial | 2013 |
| Neptune Pulse Ltd | Information & communication | 2025 |
| Neptune Spares Limited | Wholesale & retail | 2010 |
| Neptune Window Cleaning Limited | Financial services | 2017 |
| Neptunus World Limited | Information & communication | 2021 |