| Neat Systems Ltd | Professional & scientific | 2023 |
| Neatovera Ltd | Administrative & support | 2024 |
| Neatpixels Ltd | Information & communication | 2020 |
| Neighbourhood Plumbing Limited | Construction | 2026 |
| Nelg Productions Limited | Other services | 2014 |
| Nelson Turner Properties Limited | Hospitality | 2022 |
| Nelton Exhibitions Limited | Professional & scientific | 1987 |
| Nelton Publications Limited | Information & communication | 1986 |
| Neofab Ltd | Wholesale & retail | 2025 |
| Neojets Ltd | Transport & logistics | 2018 |
| Neon Clean Limited | Administrative & support | 2015 |
| Neon Souls Limited | Information & communication | 2014 |
| Nest Boxx Ltd | Wholesale & retail | 2020 |
| Nestblend Ltd | Wholesale & retail | 2023 |
| Nestive Technologies Limited | Information & communication | 2026 |
| Nestwise Investments Ltd | Real estate | 2024 |
| Nethercent Studios Ltd | Information & communication | 2026 |
| Netpayroll Limited | Professional & scientific | 1989 |
| Netpayroll Solutions Limited | Professional & scientific | 1992 |
| Netpayroll.Co.Uk Limited | Professional & scientific | 1982 |
| Nettlesteads Limited | Professional & scientific | 2011 |
| Network Courier Delivery Limited | Transport & logistics | 2007 |
| Network Courier Services Limited | Transport & logistics | 1983 |
| Network Managers (UK) Limited | Extraterritorial | 1990 |
| Network Team Worldwide Limited | Professional & scientific | 2006 |
| Neue Limited | Professional & scientific | 2016 |
| Neuri Consulting LLP | | 2012 |
| Neuri Limited | Information & communication | 2005 |
| Neuro Employment Works Ltd | Professional & scientific | 2025 |
| Neuro-Muscular Clinic Ltd | Health & social care | 2023 |
| Neuroscope Diagnostics Ltd | Health & social care | 2025 |
| New Beach Limited | Real estate | 2015 |
| New Canton Chinese Cuisine Limited | Hospitality | 2020 |
| New Century Ltd | Professional & scientific | 2024 |
| New Contact Ltd | Information & communication | 2026 |
| New Coppice Residents Company Limited | Households | 1995 |
| New East Sheen Shushi Ltd | Hospitality | 2023 |
| New Forest Bespoke Construction Ltd | Construction | 2020 |
| New Forest Wealth Management Limited | Professional & scientific | 2012 |
| New Garage (Harnham) Limited | Wholesale & retail | 2017 |
| New Heaven Ltd | Health & social care | 2023 |
| New Himalayan Foods Limited | Wholesale & retail | 2023 |
| New Level Recruitment Limited | Administrative & support | 2005 |
| New PAK Halal Ltd | Wholesale & retail | 2017 |
| New Road Education Limited | Administrative & support | 2023 |
| New System Group Limited | Construction | 2019 |
| New System Ltd. | Construction | 2015 |
| New Thames Limited | Professional & scientific | 2001 |
| New Wimbledon Theatre Limited | Arts & recreation | 2003 |
| Newark House Management Company Limited | Households | 2021 |
| Newark Mews Management Company Limited | Households | 2002 |
| Newbridge Holdings Ltd | Administrative & support | 2015 |
| Newell's Properties Limited | Real estate | 2024 |
| Newell's Travel Group Limited | Other services | 2020 |
| Newell's Travel Holdings Limited | Financial services | 2020 |
| Newell's Travel Limited | Administrative & support | 2003 |
| NEWLIFE19! Limited | Wholesale & retail | 2025 |
| Newmantech Solutions Ltd | Professional & scientific | 2021 |
| Newmarket Brown Consulting Ltd | Professional & scientific | 2019 |
| Newnham and Associates Limited | Financial services | 2013 |
| Newton Private Equity Limited | Wholesale & retail | 2026 |
| Newton's Cars Limited | Transport & logistics | 2018 |
| Newtons Coaches Limited | Transport & logistics | 2015 |
| Newtons SKI Ltd | Wholesale & retail | 2025 |
| Nexion Services Ltd | Manufacturing | 2024 |
| Next Action Associates Limited | Administrative & support | 2009 |
| Next Corner Engineering Ltd | Professional & scientific | 2025 |
| Next Level Leadership Ltd | Education | 2024 |
| Next Systems Limited | Information & communication | 1993 |
| Nexted Ltd | Education | 2025 |
| Nextera Dynamics Ltd | Wholesale & retail | 2024 |
| Nexture Consulting Ltd | Professional & scientific | 2025 |
| Nextyear Property Management Limited | Professional & scientific | 1990 |
| Nexway Consultancy Ltd | Professional & scientific | 2017 |
| NGK Properties Limited | Households | 2025 |
| Niada Ltd | Information & communication | 2024 |
| Nice and Cozy Ltd | Real estate | 2020 |
| Nicholas Betancourt Ltd | Wholesale & retail | 2018 |
| Nicholson Nash Ltd. | Construction | 2019 |
| Nick Burke Design Ltd | Other services | 2024 |
| Nickservices Limited | Health & social care | 2016 |
| Nicola Mcginty Ltd | Real estate | 2002 |
| Nicon Services Ltd | Transport & logistics | 2020 |
| Nieem Ltd | Professional & scientific | 2023 |
| Nigel Blake Design Limited | Professional & scientific | 2007 |
| Nigel Denby Limited | Hospitality | 2005 |
| Night Nannies (Surrey) Ltd | Administrative & support | 2015 |
| Night Sky Films Limited | Information & communication | 2021 |
| Nightingale Place Management (Cliftonville) Limited | Households | 2015 |
| Niko Garden Services Ltd | Other services | 2017 |
| Niktanya International Limited | Other services | 2005 |
| Nilotic Gems Limited | Manufacturing | 2026 |
| Nilsson IT Limited | Information & communication | 2010 |
| Nimbus Enterprise Park Management Company Limited | Real estate | 2006 |
| Nimrood Ltd | Financial services | 2024 |
| Nine Saint Annes Limited | Households | 2025 |
| Ningbo Yinzhou Zengbao Trading Company Limited | Professional & scientific | 2024 |
| Nireko Ltd | Wholesale & retail | 2025 |
| Nirjala Limited | Wholesale & retail | 2013 |
| Nisha John Ltd | Education | 2026 |