| Naito Limited | Real estate | 2024 |
| Najah Ventures Limited | Real estate | 2024 |
| Najo Capital Limited | Administrative & support | 2018 |
| Nakai Properties Limited | Real estate | 2026 |
| Nakai Property Holdings LLP | | 2024 |
| Nakor Ltd | Transport & logistics | 2024 |
| Nakshatra Limited | Wholesale & retail | 2022 |
| Nalp Corporation Limited | Real estate | 2014 |
| Nalura Ltd | Transport & logistics | 2017 |
| NAM Transport Ltd | Other services | 2025 |
| Namaste Coventry Limited | Hospitality | 2025 |
| Namaste Hospitality Group Ltd | Hospitality | 2020 |
| Namasteji UK Limited | Wholesale & retail | 2009 |
| Namayan Spirits Co. Limited | Wholesale & retail | 2020 |
| Namchi London Ltd | Professional & scientific | 2019 |
| Name PR Limited | Professional & scientific | 2014 |
| Namechamp Limited | | 1980 |
| Nammex Limited | Real estate | 2019 |
| Nanah IVY Limited | Health & social care | 2025 |
| Nanba Capital Ltd | Real estate | 2020 |
| Nancy London Limited | Wholesale & retail | 2016 |
| Nand Property Ltd | Real estate | 2026 |
| Naniki Ltd | Real estate | 2017 |
| Nanima Limited | Hospitality | 2019 |
| Nanji Investments LLP | | 2026 |
| Nanji Solutions Ltd | Information & communication | 2018 |
| Nanny Sophie Care Limited | Health & social care | 2026 |
| Nanosoft Consultancy Limited | Other services | 2010 |
| Nanthi Global PVT Ltd | Manufacturing | 2026 |
| Nanu Roofing Ltd | Construction | 2023 |
| Nanur Limited | Transport & logistics | 2018 |
| Napoli Stores Ltd | Wholesale & retail | 2020 |
| Napson Limited | Households | 1984 |
| Naqsh Developments Ltd | Construction | 2019 |
| NAR Ceylon Kothu Grand Ltd | Hospitality | 2025 |
| Narang Technical Services Limited | Wholesale & retail | 2002 |
| Narangee Ltd | Wholesale & retail | 2021 |
| Narayan Catering Limited | Hospitality | 2018 |
| Narayan Gold and Jewellery Limited | Manufacturing | 2012 |
| Narayan Property Investments Limited | Real estate | 2024 |
| Narayana Enterprise Ltd | Wholesale & retail | 2025 |
| Narayandeep UK Ltd | Transport & logistics | 2025 |
| Narcissus Properties Limited | Real estate | 2016 |
| Nargis (UK) Limited | Administrative & support | 2002 |
| Nari Foods Limited | Hospitality | 2022 |
| Nari Homes Limited | Real estate | 2020 |
| Narilou Studio Ltd | Professional & scientific | 2020 |
| Narjis Estates Ltd | Real estate | 2021 |
| Nark Limited | Real estate | 2023 |
| Narmis Investments Ltd | Real estate | 2023 |
| Narnia Estates Ltd | Real estate | 2026 |
| Narotomo Investments Ltd | Real estate | 2026 |
| Narrative Threads Ltd | Arts & recreation | 2014 |
| Nart Beauty Ltd | Wholesale & retail | 2021 |
| Narud Ltd | Real estate | 2026 |
| Narvekar Consultants Limited | Information & communication | 2009 |
| Narwal UK Limited | Information & communication | 2023 |
| NAS 3 Limited | Real estate | 2025 |
| NAS Academy Limited | Professional & scientific | 2023 |
| NAS Tech Consultancy Limited | Professional & scientific | 2023 |
| Naseeb Shopping Mall UK Ltd | Professional & scientific | 2026 |
| Naseem Khan Consulting Limited | Professional & scientific | 2016 |
| Nasha Foods Ltd | Hospitality | 2021 |
| Nashfieldcompany Limited | Professional & scientific | 2017 |
| Nasko Trading Ltd | Wholesale & retail | 2023 |
| Nasmech Services Limited | Professional & scientific | 2012 |
| Nasser Property Group Ltd | Real estate | 2024 |
| Nassif Limited Company Ltd | Health & social care | 2013 |
| Nastrut Claudiu Limited | Construction | 2022 |
| NAT Constructions Ltd | Construction | 2025 |
| Natalie Claude Limited | Other services | 2022 |
| Natalie Yalden Marketing Limited | Professional & scientific | 2024 |
| Natan Heber Art & Design Ltd | Arts & recreation | 2011 |
| Natash Limited | Financial services | 2026 |
| Natbro UK Limited | Transport & logistics | 2005 |
| Natca Gold Ltd | Health & social care | 2014 |
| Natchet Finance Limited | Professional & scientific | 2026 |
| Natco Pharma UK Limited | Wholesale & retail | 2023 |
| Nathan Associates Limited | Professional & scientific | 2006 |
| Nathan Capital Ltd | Financial services | 2026 |
| National Community Boats Association | Other services | 2005 |
| National Media Compmay Ltd | Hospitality | 2025 |
| National Virtual Academy Limited | Education | 2025 |
| Nationbuild Construction U.K Ltd | Construction | 2026 |
| Nationbuild Holdings Ltd | Financial services | 2026 |
| Nationwide W and D Ltd | Wholesale & retail | 2024 |
| Nativepride Limited | Real estate | 1994 |
| Natpu Ventures Ltd | Construction | 2026 |
| Natraj Food (Rayners Lane) Limited | Wholesale & retail | 2017 |
| Natralife Ltd | Wholesale & retail | 2021 |
| Natravista UK Limited | Extraterritorial | 2022 |
| Naturaa Ltd | Information & communication | 2026 |
| Natural Environment Limited | Wholesale & retail | 2019 |
| Natural Foot Health Company Ltd | Wholesale & retail | 2024 |
| Natural Jamil Limited | Other services | 2024 |
| Natural Resource Capital Ltd | Professional & scientific | 2025 |
| Natural Smiles (Leicester) Limited | Extraterritorial | 2014 |
| Natural Turn Ltd | Education | 2025 |
| Naturally Edible Ltd | Wholesale & retail | 2018 |
| Naturally LIT Ltd | Manufacturing | 2018 |