| Nailed Liverpool Ltd | Other services | 2022 |
| Nails 86 Ltd | Other services | 2024 |
| Nails First Garston Ltd | Other services | 2024 |
| NAILS2U (LV) Limited | Other services | 2023 |
| Naisby's Electric Services Ltd | Other services | 2004 |
| NAJ& Ltd | Wholesale & retail | 2025 |
| Najis 2 Continental Market Limited | Wholesale & retail | 2023 |
| Najis Continental Market Limited | Wholesale & retail | 2023 |
| Najjar's Group Limited | Construction | 2021 |
| Najma Learning Ltd | Manufacturing | 2023 |
| Nakagod Healthcare Resources Limited | Health & social care | 2024 |
| Naked Sundays Brew Co Ltd | Manufacturing | 2019 |
| Nalacot Ltd | Manufacturing | 2025 |
| Nalavi Properties Ltd | Real estate | 2023 |
| Nalea Food Ltd | Hospitality | 2023 |
| Naledihq Ltd | Wholesale & retail | 2022 |
| Nama for General Services Ltd | Hospitality | 2023 |
| Namarals Beauty Ltd | Other services | 2025 |
| Namartech Limited | Information & communication | 2025 |
| Nambiti Wildlife Conservation Trust | Arts & recreation | 2020 |
| Namcollis Mart Limited | Wholesale & retail | 2018 |
| Namit Investments Limited | Real estate | 1998 |
| Namla Technologies Limited | Professional & scientific | 2026 |
| Namlink Ltd | Financial services | 2026 |
| Namma Ooru Dosa Ltd | Wholesale & retail | 2023 |
| Nan's Care Ltd | Administrative & support | 2024 |
| Nanamo Marketing Consultancy Limited | Professional & scientific | 2018 |
| Nanchos Food Ltd | Hospitality | 2026 |
| Nancon Limited | Real estate | 2024 |
| Nancy Jacob Ltd | Wholesale & retail | 2025 |
| Nanegoce Limited | Wholesale & retail | 2020 |
| Nanny Jane’S Limited | Hospitality | 2026 |
| Nanny Kids Ltd | Health & social care | 2026 |
| Nannytap Ltd | Information & communication | 2018 |
| Nano Biosols Ltd | Professional & scientific | 2014 |
| Nanogeek Limited | Information & communication | 2025 |
| Nanomall Ltd | Wholesale & retail | 2025 |
| Nanscorner Limited | Administrative & support | 2025 |
| Nantwich Builders (NW) Ltd | Construction | 2018 |
| Naomi Battrick Limited | Arts & recreation | 2018 |
| Naomi Cole Clinic Ltd | Other services | 2020 |
| Naomi's Beauty Training Academy Limited | Other services | 2026 |
| Napier Security Services Ltd | Administrative & support | 2024 |
| Napier Wolf Executive Search Limited | Administrative & support | 2011 |
| Napier Wolf Recruitment Limited | Administrative & support | 2010 |
| Napierpoint Construction Ltd | Construction | 2024 |
| Napierpoint Development Ltd | Real estate | 2024 |
| Naples Pizza UK Ltd | Hospitality | 2025 |
| Napoli Takeaway Ltd | Hospitality | 2017 |
| Nara Group Ltd | Administrative & support | 2025 |
| Narava First Limited | Financial services | 2022 |
| Nargis B. Ltd | Wholesale & retail | 2025 |
| Naroma Ltd | Transport & logistics | 2017 |
| Narrativa Media Ltd | Professional & scientific | 2025 |
| Narrisha's Thai Kitchen Ltd | Hospitality | 2024 |
| Nars Capital Ltd | Real estate | 2020 |
| Narumonholden Ltd | Transport & logistics | 2022 |
| Narvik Logistics UK Ltd | Transport & logistics | 2021 |
| Nasadimalik Ltd | Information & communication | 2021 |
| Nasci B Limited | Hospitality | 2025 |
| Nascimento Limited | Wholesale & retail | 2024 |
| Nasg Professional Services Ltd | Other services | 2025 |
| Nasgm Investments Limited | Real estate | 2015 |
| Nash Construction (NW) Ltd | Construction | 2020 |
| Nash Properties and Developments Ltd | Real estate | 2023 |
| Nash T Limited | Health & social care | 2024 |
| Nasir Investment Limited | Real estate | 2021 |
| Nasitra Holdings Limited | Financial services | 2025 |
| Nasitra Limited | Real estate | 2003 |
| Nasj Legacy Ltd | Real estate | 2025 |
| Nasogastric Feeding Solutions Ltd | Extraterritorial | 2021 |
| Nassarflav Ltd | Administrative & support | 2021 |
| NAT Property Group Ltd | Real estate | 2025 |
| Natalie ANN Deen Ltd | Professional & scientific | 2025 |
| Natalie Grace EMS Limited | Hospitality | 2024 |
| Natalie Mcdonough Limited | Financial services | 2014 |
| Natalie Rice Ltd | Education | 2022 |
| Nathan Askew Ltd | Health & social care | 2026 |
| Nathan Benyon IT Consulting Ltd | Information & communication | 2018 |
| Nathan Lates Care Ltd | Health & social care | 2019 |
| Nathan Tsao Consultancy Ltd | Professional & scientific | 2011 |
| Nathan-Army Ltd | Administrative & support | 2016 |
| Nathanael Company Ltd | Health & social care | 2022 |
| Nathaniel Wong Ltd | Financial services | 2017 |
| Nathina England Limited | Wholesale & retail | 2021 |
| Nation Burger Ltd | Hospitality | 2024 |
| Nation Events Limited | Arts & recreation | 2022 |
| Nation Facilities & Security Management Ltd | Administrative & support | 2019 |
| Nation Security NW Ltd | Administrative & support | 2025 |
| Nation Security U.K. Ltd | Administrative & support | 2016 |
| Nation Tyres & Autocare Limited | Wholesale & retail | 2001 |
| National Aesthetics Training Academy Ltd | Education | 2020 |
| National Alex Trans Ltd | Wholesale & retail | 2016 |
| National Beauty Awards Limited | Administrative & support | 2022 |
| National Beauty Group Ltd | Professional & scientific | 2021 |
| National College for Advanced Transport and Infrastructure | Education | 2021 |
| National Cylinder Testing (NCT) Ltd | Other services | 2020 |
| National Family Support Service Limited | Health & social care | 2018 |
| National Hunt Limited | Information & communication | 2025 |
| National Law Partners Limited | Professional & scientific | 2012 |