| Natural Touch Aromatherapy Ltd | Wholesale & retail | 2020 |
| Natural Touch Limited | Health & social care | 2020 |
| Nature's Cousins Ecology & Conservation Ltd | Administrative & support | 2026 |
| Natwira Kafaeboran Ltd | Wholesale & retail | 2025 |
| Navaic Ltd | Information & communication | 2026 |
| Navfaw Ltd | Health & social care | 2018 |
| NAZ Dent & Beaut Ltd | Health & social care | 2019 |
| NB New Build Marine Consultancy Ltd | Other services | 2018 |
| NBC Build Limited | Extraterritorial | 2017 |
| NBC Contracting Ltd | Construction | 2009 |
| Nbng Ltd | Transport & logistics | 2021 |
| Ndugu Limited | Extraterritorial | 2021 |
| Neck of the Woods Films Limited | Information & communication | 2019 |
| Neeter Drive Limited | Extraterritorial | 1939 |
| Neha Health Care Limited | Health & social care | 2014 |
| Neisco UK Limited | Wholesale & retail | 2022 |
| Nekton Enterprises Limited | Professional & scientific | 2016 |
| Neocom Limited | Information & communication | 1998 |
| Nest Seeker Homes Ltd | Real estate | 2023 |
| NET to Air Limited | Information & communication | 2010 |
| Netley Independent Funeral Directors Ltd | Other services | 2020 |
| Network Acoustics Limited | Manufacturing | 2020 |
| Network Magazines Limited | Information & communication | 2025 |
| Neuro Inclusive Solutions Ltd | Education | 2023 |
| Neurodivergent Arts CIC | Arts & recreation | 2025 |
| Neuronix Ltd | Manufacturing | 2026 |
| Neurotechnology Innovation Ltd | Manufacturing | 2024 |
| Neverland Skateparks Ltd. | Professional & scientific | 2024 |
| New Acre Developments Ltd | Construction | 2024 |
| New Acre Group Ltd | Financial services | 2025 |
| New Chapel Car Company Limited | Wholesale & retail | 2008 |
| New Cliff House Management Ltd. | Households | 1988 |
| New Dawnn Limited | Health & social care | 2024 |
| New Earth Collective Ltd | Information & communication | 2023 |
| New ERA Agency Ltd | Real estate | 2002 |
| New Forest Carpentry Ltd | Manufacturing | 2021 |
| New Forest Developments Ltd | Construction | 2003 |
| New Forest Scaffolding Limited | Construction | 2010 |
| New Galloway Diggers Limited | Administrative & support | 2011 |
| New Hampshire Corporate Limited | Administrative & support | 2005 |
| New Path Fire and Security Ltd | Administrative & support | 2020 |
| New Peking Phoenix Ltd | Hospitality | 2024 |
| New Sarum House Ltd | Construction | 2019 |
| New Summits Limited | Administrative & support | 2017 |
| Newbridge Nurseries Limited | Wholesale & retail | 1962 |
| Newland Lets Limited | Real estate | 2025 |
| Newmans Heating & Plumbing Ltd | Construction | 2016 |
| Newmans Transport Limited | Wholesale & retail | 2016 |
| Newmar Overseas Consulting Limited | Professional & scientific | 2017 |
| Newmar Overseas Ltd | Other services | 2016 |
| Newtown Road Management Limited | Hospitality | 1988 |
| Nezrachi Ltd | Administrative & support | 2020 |
| NFL Smart Repairs Limited | Wholesale & retail | 2011 |
| NGS Landscapes Ltd | Administrative & support | 2024 |
| NH Orthopaedics Limited | Health & social care | 2010 |
| Nical Engineering Limited | Wholesale & retail | 2003 |
| Nicera European Works Limited | Wholesale & retail | 1990 |
| Nichol Developments Ltd | Manufacturing | 2016 |
| Nicholas JP Limited | Professional & scientific | 2025 |
| Nicholas Stanford Limited | Real estate | 2023 |
| Nicholls & Vine Estates Limited | Real estate | 2025 |
| Nichols Cars Limited | Manufacturing | 2017 |
| Nick Culhane Highway Consultant Ltd | Professional & scientific | 2023 |
| Nick Horn Ltd | Agriculture & fishing | 2018 |
| Nick Jones Project Management Limited | Professional & scientific | 2006 |
| Nicky Miles Book-Keeping Services Limited | Professional & scientific | 2011 |
| Niclil Trans Limited | Transport & logistics | 2016 |
| Nicon Solutions Limited | Information & communication | 2020 |
| Nightjar Limited | Professional & scientific | 2002 |
| Nikisha & Co Ltd | Manufacturing | 2025 |
| Nilo Electrical Solutions Limited | Construction | 2026 |
| Nimble Analytica Consulting Limited | Information & communication | 2023 |
| Nimble Analytica Ltd | Information & communication | 2019 |
| Nine - Bespoke Pens Ltd | Manufacturing | 2021 |
| Nineteen Ninety-Four Limited | Extraterritorial | 2021 |
| Ninovation Limited | Professional & scientific | 2018 |
| Ninyosa Limited | Financial services | 2025 |
| Niranet Services Ltd | Professional & scientific | 2013 |
| Nittin Gadgets Limited | Other services | 2024 |
| Nivas Construction Ltd | Construction | 2022 |
| Nivas Holdings Ltd | Construction | 2018 |
| Nivas Property Development Ltd | Real estate | 2021 |
| Nivas Property Investments Ltd | Real estate | 2021 |
| Nixa Technology Ltd | Wholesale & retail | 2025 |
| NJB and Sons Ltd | Construction | 2024 |
| NJR Electrical Contractors Limited | Construction | 2015 |
| Njug Limited | Other services | 2003 |
| NK Tiling Limited | Construction | 2016 |
| NM Carpentry & Renovations Ltd | Construction | 2023 |
| NM Catering (South) Limited | Hospitality | 2017 |
| NO 1 Beauty Studio Ltd | Other services | 2022 |
| NO FLY Travel.Com Ltd | Extraterritorial | 2004 |
| NO. 4 Ltd | Hospitality | 2012 |
| Nobela Ltd | Wholesale & retail | 2020 |
| Noden International Holdings Limited | Administrative & support | 2023 |
| Noden International Limited | Administrative & support | 2008 |
| NOI ORA Commercial Ltd | Real estate | 2023 |
| NOI ORA Group Ltd | Administrative & support | 2023 |
| NOI ORA Residential Ltd | Real estate | 2023 |
| Nonidoo Limited | Wholesale & retail | 2019 |