| Neo-Global Technology Ltd | Transport & logistics | 2018 |
| NEP Global Ltd | Wholesale & retail | 2024 |
| Nervertide Enterprises Limited | Professional & scientific | 2005 |
| Nestbloom Limited | Wholesale & retail | 2025 |
| Nether Close Management Company Limited | Households | 2005 |
| Nets Galore Limited | Manufacturing | 2007 |
| Network Components and Solutions Limited | Information & communication | 2006 |
| Network Interiors Limited | Construction | 2003 |
| Netzalive Group Ltd | Wholesale & retail | 2024 |
| Neuraluna AI UK Limited | Professional & scientific | 2025 |
| Nevendon Kebab Ltd | Hospitality | 2026 |
| Never SAY Never Again Ltd | Arts & recreation | 2020 |
| Neville Murton Consulting Ltd | Professional & scientific | 2024 |
| New Aqees Communication Ltd | Other services | 2017 |
| New City Limits Limited | Hospitality | 2006 |
| New Coast Properties Ltd | Real estate | 2021 |
| New Creation Design Ltd | Professional & scientific | 2000 |
| New Edge Limited | Professional & scientific | 2001 |
| New Focus IT Limited | Wholesale & retail | 2007 |
| New Generation Developments (Grays) Limited | | 1986 |
| New Holland Tractor Limited | Manufacturing | 1963 |
| New Hope International | Health & social care | 2006 |
| New Horizon Limited | Real estate | 1997 |
| New House Lane Green Waste Centre Ltd | Water & waste | 2025 |
| New Look Homes Limited | Wholesale & retail | 2003 |
| New Regal Ventures Ltd | Wholesale & retail | 2025 |
| New Road Valeters Ltd | Other services | 2023 |
| New Style Enterprises Limited | Real estate | 1986 |
| New Yung's Ltd | Hospitality | 2016 |
| Newcombe Bros. Motorcycles Ltd. | Wholesale & retail | 1993 |
| Newkko Ltd | Hospitality | 2018 |
| Newland Consultancy Limited | Information & communication | 2005 |
| Newland Security Ltd | Administrative & support | 2023 |
| Newman Fireplaces Limited | Manufacturing | 2001 |
| Newmans Funeral Directors Limited | Other services | 1997 |
| Newmech Limited | Construction | 1989 |
| Newmega Limited | Construction | 1995 |
| Newmowa Ltd | Wholesale & retail | 2024 |
| Newspace Communications Limited | Construction | 2003 |
| Newspan Design Limited | Real estate | 2002 |
| Newvalley Developments Limited | Extraterritorial | 1987 |
| Nexacore Enterprises Ltd | Wholesale & retail | 2025 |
| Nexfeeds Ltd | Wholesale & retail | 2026 |
| Nexgen Interactive Limited | Information & communication | 2006 |
| Nexmetric Ltd | Professional & scientific | 2025 |
| Nexor Tech Ltd | Information & communication | 2025 |
| Nexora Studios Ltd | Information & communication | 2025 |
| Nexsim Ltd | Information & communication | 2026 |
| Next Steps Care Services Inc Ltd | Other services | 2013 |
| Nextc Ltd | Wholesale & retail | 2024 |
| Nextgen Mart Limited | Wholesale & retail | 2025 |
| Nextgen Residential Group Ltd | Health & social care | 2026 |
| Nextgen Tech Limited | Wholesale & retail | 2018 |
| Nextgencam Energy Park Ltd | Real estate | 2025 |
| Nexttrend Limited | Wholesale & retail | 2026 |
| Nexus (Blocks 1, 2 and 3) Building Management Limited | Households | 2025 |
| Nexus Labs Ltd | Wholesale & retail | 2025 |
| Nexus Prestige Ltd | Wholesale & retail | 2003 |
| Nexus Professional Services Limited | Information & communication | 2006 |
| Nexvio Ltd | Wholesale & retail | 2026 |
| Ngag One Limited | Hospitality | 2016 |
| Niamex Limited | Health & social care | 2004 |
| Nibbles & Nuggets Ltd | Professional & scientific | 2020 |
| NIC Ice Limited | Manufacturing | 1945 |
| Nicaiseam Ltd | Wholesale & retail | 2025 |
| Nicholas Loveland Ltd | Other services | 2000 |
| Nicholls-Build Limited | Construction | 2007 |
| Nick Cooke and Associates Limited | Administrative & support | 2002 |
| Nick the Greek Ltd | Manufacturing | 2013 |
| Nico Manufacturing Limited | Manufacturing | 1993 |
| Nico Technology Ltd | Information & communication | 1999 |
| Nicola Jane Interiors Limited | Professional & scientific | 2025 |
| Nicso Limited | Health & social care | 2019 |
| Nigel Quiney Publications Limited | Information & communication | 1987 |
| Nightcity Media Ltd | Information & communication | 2025 |
| Nightingale Court (Islington) Limited | Real estate | 1997 |
| Nightingale Nannies | | 1999 |
| Nihari Ltd | Wholesale & retail | 2026 |
| Nika Technologies Ltd | Information & communication | 2016 |
| Nikkisavy Limited | Manufacturing | 2022 |
| Nilesh Munjal Limited | Wholesale & retail | 2026 |
| Nimy Ltd | Real estate | 2003 |
| Ninefive Pals Limited | Information & communication | 2023 |
| Nineteenminutes Ltd | Administrative & support | 2007 |
| Ninety One Entertainment Ltd | Wholesale & retail | 2024 |
| Nirebilee Ltd | Hospitality | 2018 |
| Nismo Solutions Limited | Information & communication | 2025 |
| Nithyasri Limited | Information & communication | 2021 |
| Nivenwell Limited | Information & communication | 1976 |
| Nivnee Healthcare Services Ltd | Health & social care | 2026 |
| Nizcon Electrical Ltd | Construction | 2024 |
| NJB Property Maintenance Ltd | Construction | 2025 |
| NJC Consulting Ltd | Professional & scientific | 2025 |
| NK Retail Group Ltd | Wholesale & retail | 2013 |
| NKS Property Limited | Real estate | 2017 |
| Nmdub Developments Limited | Real estate | 2026 |
| Nmmk Domus Ltd | Real estate | 2020 |
| Nmmk Holdings Ltd | Health & social care | 2020 |
| NN1 Properties Ltd | Real estate | 2025 |
| NNS Private Limited Ltd | Information & communication | 2026 |