| Nepalese Jewellery Group United Kingdom PVT Ltd | Manufacturing | 2022 |
| Nepali Cuisine Ltd | Hospitality | 2023 |
| Nepali Kitchen Limited | Hospitality | 2001 |
| Nepbridge Academy Limited | Education | 2024 |
| Nepbridge Recruitment Services Limited | Administrative & support | 2025 |
| Nepbridge Services Limited | Administrative & support | 2018 |
| Neptal Limited | Information & communication | 2020 |
| Netrep Limited | Information & communication | 2022 |
| Network Integration Systems Limited | Information & communication | 2010 |
| Networkly Ltd | Information & communication | 2024 |
| Neve Advisory Limited | Professional & scientific | 2023 |
| Nevona Ltd | Wholesale & retail | 2013 |
| New ERA Builders Ltd | Construction | 2017 |
| New Horizon Creation Ltd | Manufacturing | 2022 |
| New Laxmi Boutique Limited | Wholesale & retail | 2017 |
| New Lite Accountants Ltd | Professional & scientific | 2025 |
| New Lite Care Services Ltd | Health & social care | 2024 |
| New Look Cuts Ltd | Other services | 2026 |
| Newa Brothers Ltd | Hospitality | 2023 |
| Newauto Limited | Manufacturing | 1995 |
| Newwave Hub Ltd | Education | 2024 |
| Nextgen Wealth Ltd | Information & communication | 2026 |
| NGD Group Limited | Construction | 2021 |
| NGK Design & Build Ltd | Construction | 2016 |
| NH Integrity Limited | Administrative & support | 2014 |
| NI Fashion and Boutique Ltd | Wholesale & retail | 2026 |
| Nicky Gash Marketing Services Limited | Professional & scientific | 2023 |
| Nifes Associates Community Fellowship (UK) Ltd | Other services | 2010 |
| Nightingale Events Ltd | Hospitality | 2024 |
| Nihal Tech Repair Ltd | Administrative & support | 2025 |
| Nilam Lotus Limited | Hospitality | 2023 |
| Nimbus Human Resource Ltd | Information & communication | 2020 |
| NINETY3 Billion Ltd | Information & communication | 2020 |
| Nirvana VR Ltd | Information & communication | 2024 |
| Nish Catering Ltd | Hospitality | 2026 |
| Nitcs Consulting Ltd | Information & communication | 2022 |
| Niyara Properties Ltd | Real estate | 2025 |
| NJ Spall Plastering Limited | Construction | 2009 |
| NJ2 Ltd | Wholesale & retail | 2014 |
| Nkechi International Ltd | Extraterritorial | 2024 |
| NKM Plumbing and Heating Services Limited | Construction | 2016 |
| NLC Agency Limited | Administrative & support | 2022 |
| NLP Consult Ltd | Administrative & support | 2017 |
| NLP Residential Ltd | Households | 2021 |
| NM Auto Repairs Ltd | Wholesale & retail | 2023 |
| Nomad Games Consulting Ltd | Information & communication | 2024 |
| Nomrules Motion Ltd. | Information & communication | 2016 |
| Nordic Blue Company Limited | Other services | 2024 |
| Nordic Life Water UK Limited | Wholesale & retail | 2019 |
| Normanswood Manor Management Company Limited | Households | 1996 |
| North American Services Ltd | Information & communication | 2023 |
| North Hants Tyre and Remoulding Company Limited | Wholesale & retail | 1952 |
| North Lane Garage Limited | Wholesale & retail | 2006 |
| North Lane Sea Food Limited | Hospitality | 2023 |
| Northstar Stays Ltd | Real estate | 2026 |
| Nortonbridge Advisory Services UK Ltd | Information & communication | 2023 |
| NOT a Chain - Eatery Ltd | Information & communication | 2018 |
| Notes Consultants Limited | Professional & scientific | 2024 |
| Notingwood Ltd | Professional & scientific | 2010 |
| Noughty Records Limited | Information & communication | 2004 |
| Nova Real Estate Limited | Real estate | 2025 |
| Novu LUX Homes Ltd | Construction | 2024 |
| Novu LUX Ltd | Construction | 2022 |
| Novum Associates Ltd | Construction | 2003 |
| NOW Lighting Ltd | Wholesale & retail | 2019 |
| NPF Estate Ltd | Real estate | 2023 |
| NPL Supplies Limited | Administrative & support | 2025 |
| NS TEJ Ltd | Information & communication | 2015 |
| NSF Combustion Engineering Services Limited | Manufacturing | 2003 |
| NTT Building Consultancy Limited | Administrative & support | 2021 |
| NU New Ltd | Wholesale & retail | 2025 |
| NUTRITION21 Ltd | Other services | 2021 |
| Nuttifox Limited | Information & communication | 2016 |
| Nyleve Collection Ltd | Wholesale & retail | 2026 |
| O & M Construction Ltd | Construction | 2026 |
| Oaklands (Hartley Wintney) Freehold Limited | Real estate | 2010 |
| Oaklands (Hartley Wintney) Residents Association Limited | Households | 1979 |
| Oaklane Consulting Ltd | Financial services | 2015 |
| Oaklane Homes Ltd | Real estate | 2023 |
| Oaklea Builders Limited | Construction | 2003 |
| Oaklea Property Developments Limited | Construction | 2022 |
| Oakley Hall Park Limited | Hospitality | 1993 |
| Oakley Hall Properties Ltd | Extraterritorial | 2025 |
| Oaks Services Limited | Wholesale & retail | 2003 |
| Oaktrees (ASH) Management Company Ltd | Households | 1996 |
| Oasis Kitchen Ltd | Hospitality | 2025 |
| Oasis Relocations Ltd | Real estate | 2025 |
| OBC Recruitment Limited | Administrative & support | 2025 |
| Oceanica Healthcare Ltd | Health & social care | 2025 |
| Oceantek Solutions Ltd | Information & communication | 2023 |
| Ocha Tea Limited | Hospitality | 2022 |
| Octomarc Industries Ltd | Information & communication | 2002 |
| Odyssey Technologies Limited | Information & communication | 1995 |
| Ojay Services Ltd | Health & social care | 2024 |
| OJC Services FM Limited | Construction | 2023 |
| Olaay Ltd | Health & social care | 2014 |
| Olioski Property Services Limited | Real estate | 2020 |
| Ollies Pest Control Hampshire Ltd | Agriculture & fishing | 2022 |
| OM Beauty & Hair Salon Ltd | Other services | 2023 |
| OM Momo Kingdom Ltd | Hospitality | 2025 |