| Naxis Limited | Administrative & support | 2024 |
| Nazafat Ltd | Wholesale & retail | 2025 |
| Nazar H & Sons Ltd | Wholesale & retail | 2022 |
| Nazara Courier Ltd | Transport & logistics | 2025 |
| Nazda Limited | Information & communication | 2024 |
| Naznin Properties Ltd | Real estate | 2025 |
| Nazo Easebuy Ltd | Wholesale & retail | 2025 |
| Nazolia Ltd | Administrative & support | 2025 |
| Nazrah Ltd | Wholesale & retail | 2025 |
| NB Medicare Limited | Health & social care | 2016 |
| NBJ Dent Ltd | Health & social care | 2024 |
| NBR8 UK Ltd | Transport & logistics | 2013 |
| NBS Auto Services Ltd | Wholesale & retail | 2026 |
| NBS Motors Ltd | Wholesale & retail | 2023 |
| NCE Construction Ltd | Construction | 2025 |
| Ncube Solutions Ltd | Information & communication | 2016 |
| ND Recruitment Limited | Administrative & support | 2026 |
| ND Technical Ltd | Professional & scientific | 2020 |
| Ndnt Limited | Other services | 2013 |
| Neats CT Hand Car Wash Ltd | Administrative & support | 2025 |
| Nebula Sales Ltd | Extraterritorial | 2024 |
| NEC Entertainment Ltd | Arts & recreation | 2023 |
| Nectar Fostering Services Limited | Health & social care | 2020 |
| NED Energy Cleaning Limited | Administrative & support | 2017 |
| Nedfx Limited | Wholesale & retail | 2025 |
| Need a Plumber ? Limited | Administrative & support | 2002 |
| Needwood Care Limited | Health & social care | 2021 |
| Neelmakhan Limited | Health & social care | 2022 |
| Neem Builders Ltd | Construction | 2019 |
| Neevinfra Ltd | Information & communication | 2019 |
| Negao Removals UK Ltd | Water & waste | 2025 |
| Neil Broadhead Limited | Information & communication | 2014 |
| Neil Multitrades Ltd | Construction | 2024 |
| Neizerconsulting Ltd | Information & communication | 2024 |
| Nelect Limited | Other services | 2018 |
| Nell Computers Ltd | Information & communication | 2010 |
| Nella Milan Home Limited | Wholesale & retail | 2024 |
| Nelom Marketing Ltd | Administrative & support | 2026 |
| Nelu & Silvia Ltd | Transport & logistics | 2019 |
| Nemi SA Ltd | Real estate | 2024 |
| Nenosys Limited | Wholesale & retail | 2015 |
| Neoarch Ltd | Professional & scientific | 2026 |
| Neocca Property Group Ltd | Real estate | 2026 |
| Neonexa Limited | Wholesale & retail | 2025 |
| Neotech Consultancy (UK) Limited | Information & communication | 2005 |
| Neoworld Ltd | Transport & logistics | 2013 |
| Nerissimo Holdings Limited | Professional & scientific | 2021 |
| Nero Logistics Ltd | Transport & logistics | 2016 |
| Neshanth Construction Limited | Construction | 2020 |
| Nesstra Services (UK) Limited | Wholesale & retail | 1982 |
| Nest & Castle Property Investments Ltd | Real estate | 2019 |
| NET Logistics Ltd | Transport & logistics | 2025 |
| Net-Worx (2001) Limited | Administrative & support | 2001 |
| Neta Civil Engineering Ltd | Construction | 2024 |
| Neta Construction Ltd | Construction | 2024 |
| Neta Homes Ltd | Construction | 2018 |
| Netactive Systems Limited | Information & communication | 1997 |
| Netgenius Solutions Limited | Information & communication | 2025 |
| Netkom Limited | Information & communication | 2014 |
| Netlight Consulting Limited | Information & communication | 2000 |
| Netpipe Limited | Information & communication | 2006 |
| Netride Ltd | Other services | 2020 |
| Netsmart Technologies Limited | Information & communication | 2012 |
| Netsol Cubix Ltd | Information & communication | 2024 |
| Network Computer Systems Limited | Information & communication | 2017 |
| Network Vehicles Limited | Administrative & support | 1978 |
| Networking & Telecom Solutions Limited | Information & communication | 2015 |
| Netzero Climate Ltd | Construction | 2025 |
| Netzolution Limited | Information & communication | 2013 |
| Neuraplicity Ltd | Information & communication | 2026 |
| Neuro Rock Ltd | Real estate | 2021 |
| Neurological Investments Ltd | Financial services | 2026 |
| Nevac Ltd | Transport & logistics | 2019 |
| Nevaeh Technology Ltd | Other services | 2022 |
| Neveco Limited | Administrative & support | 2010 |
| New AGE Marketing Network UK Ltd | Hospitality | 2019 |
| New Arrival Solutions Ltd | Extraterritorial | 2022 |
| New Bazaar Limited | Wholesale & retail | 2015 |
| New Berks Security Services Limited | Administrative & support | 2020 |
| New Crest Housing Ltd | Real estate | 2021 |
| New Dawn Writing Ltd | Professional & scientific | 2025 |
| New Dimension Kingdom Fellowship Leadership Training Centre Limited | Other services | 2015 |
| New England Estates Limited | Real estate | 2025 |
| New ERA Education Ltd | Information & communication | 1999 |
| New ERA Glazing Solutions Ltd | Wholesale & retail | 2022 |
| New ERA UK Holdings Ltd | Financial services | 2015 |
| New Fashion House Group Ltd | Wholesale & retail | 2010 |
| New Forest Family Dental Limited | Health & social care | 2026 |
| New Fresh Touch Ltd | Wholesale & retail | 2025 |
| New Frontier Education Ltd | Extraterritorial | 2011 |
| New Galaxy Trade Limited | Wholesale & retail | 2026 |
| New Hair Barbers Limited | Other services | 2023 |
| New Hair Limited | Other services | 2023 |
| New Heston Road 2 Ltd | Real estate | 2025 |
| New Heston Road Hold Co Ltd | Real estate | 2025 |
| New Heston Road Ltd | Real estate | 2023 |
| New Home Maker Ltd | Construction | 2019 |
| New Hope Slough Ltd | Other services | 2018 |
| New HOUSE24 Ltd | Real estate | 2024 |
| New Imperial Trading Ltd | Wholesale & retail | 2019 |