| Nature Creator's Ltd | Administrative & support | 2022 |
| Nature's Table Limited | Wholesale & retail | 2024 |
| Naunique Solutions Ltd | Health & social care | 2019 |
| Nawab Woodham Ltd | Hospitality | 2018 |
| Nawflaw Ltd | Information & communication | 2009 |
| Nayland Properties Ltd | Construction | 2026 |
| NAZ Ashik Property Ltd | Real estate | 2020 |
| NAZ PLM Ltd | Information & communication | 2015 |
| Naze Transport LLP | | 2016 |
| NB1 Football Coaching Ltd | Education | 2026 |
| Nb:Garden Management Services Ltd | Administrative & support | 2009 |
| Nbalchemy Photography Ltd | Professional & scientific | 2023 |
| Nbtv Limited | Information & communication | 2013 |
| NCA Building Contractors Limited | Construction | 2012 |
| NCG Energy Limited | Information & communication | 2023 |
| NDH Homes Ltd | Real estate | 2024 |
| Ndhhealthcare Ltd | Health & social care | 2014 |
| Near ME Driving School Ltd | Education | 2024 |
| Nearby ME Ltd | Information & communication | 2025 |
| Neardark Limited | Administrative & support | 2009 |
| Neary Holdings Limited | Construction | 2025 |
| Nebula Bar Ltd | Hospitality | 2022 |
| Nectar Transport LLP | | 2016 |
| Nectarine Cars Limited | Transport & logistics | 2017 |
| Neeyati Limited | Wholesale & retail | 2012 |
| Neil Copland Limited | Information & communication | 2008 |
| Neitec Limited | Administrative & support | 2023 |
| Nekifo Ltd | Information & communication | 2021 |
| Nela London Limited | Hospitality | 2023 |
| Nell Limited | Transport & logistics | 2018 |
| Nemo Entertainment Limited | Information & communication | 2010 |
| NEO Solo Limited | Hospitality | 2024 |
| Neolex Limited | Construction | 2006 |
| Neptune Contract Services Limited | Construction | 1997 |
| Nesh Financial Services Ltd | Professional & scientific | 2013 |
| Nest Edge Limited | Real estate | 2009 |
| NET Creations Limited | Information & communication | 1999 |
| NET Fusion Technologies Limited | Information & communication | 2023 |
| NET PAY (EUR) Limited | Information & communication | 2004 |
| Netizen Digital Limited | Professional & scientific | 1969 |
| Netizen Limited | Professional & scientific | 1989 |
| Networth Security Ltd | Administrative & support | 2025 |
| Neuchatel Securities Limited | Other services | 2026 |
| Neugininaturals Ltd | Wholesale & retail | 2023 |
| Neuravax Ltd | Information & communication | 2025 |
| Neurohealth London Limited | Health & social care | 2008 |
| Neuroscribe Ltd | Information & communication | 2025 |
| Neurotrash Limited | Information & communication | 2025 |
| Neurovirt Limited | Professional & scientific | 2020 |
| Nevens Private Limited | Real estate | 2023 |
| Neville Levy & Co Limited | Professional & scientific | 2009 |
| New Direction Tackle Ltd | Wholesale & retail | 2016 |
| New Hope Agency International | Health & social care | 2010 |
| New Knowing Ltd | Information & communication | 2023 |
| New Leaf Resourcing Limited | Administrative & support | 2025 |
| New Level Limited | Arts & recreation | 1998 |
| New Media Farm Limited | Other services | 2010 |
| New Mosaic Limited | Professional & scientific | 2005 |
| New Origin 2 Ltd | Information & communication | 2025 |
| New Origin Ltd | Information & communication | 2022 |
| New Street Cambridge Ltd | Real estate | 2018 |
| New Uxbridge Carpets & Furniture Ltd | Wholesale & retail | 2018 |
| New Wave Competitions Ltd | Professional & scientific | 2026 |
| New York Shades Ltd. | Wholesale & retail | 2023 |
| Newbarn Properties Limited | Real estate | 2004 |
| Newbuss Construction Limited | Construction | 2012 |
| Newbuss Developments Ltd | Construction | 2021 |
| Newcastle Assembly Rooms Trading Ltd | Arts & recreation | 2023 |
| Newcleic Ltd | Professional & scientific | 2023 |
| Newco a 13 Limited | Professional & scientific | 2013 |
| Newco B 13 Limited | Professional & scientific | 2013 |
| Newdice Limited | Real estate | 2004 |
| Newdown Property Ltd | Real estate | 2019 |
| Newer Horizons Social Care Limited | Health & social care | 2025 |
| Newington Green Capital Limited | Financial services | 2014 |
| Newline Communications Limited | Information & communication | 2002 |
| Newsoft International Ltd. | Manufacturing | 2018 |
| Newton and Carter Services (NCS) Ltd | Construction | 2016 |
| Newton Origination Ltd | Professional & scientific | 2025 |
| Newtz Limited | Transport & logistics | 2015 |
| Next Chapter Holdings Limited | Financial services | 2022 |
| Next Day Solar Limited | Construction | 2021 |
| Next GEN Golfer Limited | Construction | 2023 |
| Next GEN Security Systems Limited | Administrative & support | 2007 |
| Next Level Health Ltd | Arts & recreation | 2019 |
| Next Line Construction Ltd | Construction | 2026 |
| Next Step Recruitment Solutions Ltd | Administrative & support | 2023 |
| Next Step Support ( MK ) Ltd | Public administration | 2021 |
| Next Step Support (Dunstable) Ltd | Health & social care | 2020 |
| Next Step Support (OH) Ltd | Health & social care | 2019 |
| Next Step Support Limited | Health & social care | 2009 |
| Next Steps Support Ltd | Health & social care | 2018 |
| Next Wheels Autos Ltd | Wholesale & retail | 2022 |
| Nextgen Rigging Limited | Construction | 2014 |
| Nexthook Ltd | Information & communication | 2024 |
| Nexts Step Support Ltd | Health & social care | 2019 |
| Nexus Computing Limited | Other services | 2026 |
| NFL Business Solutions Limited | Administrative & support | 2025 |
| NFT Cloud AI Ltd | Information & communication | 2025 |
| NG & Co Consultancy Limited | Professional & scientific | 2015 |