| NAC Mechanical Ltd | Energy | 2026 |
| Nadul Ltd | Professional & scientific | 2024 |
| Naeimi Homes Limited | Real estate | 2024 |
| Naeimi Limited | Real estate | 2019 |
| Naen Ltd | Professional & scientific | 2021 |
| Nails by Design Limited | Other services | 2010 |
| Naliah Limited | Administrative & support | 2026 |
| Nanjing Investments Ltd | Real estate | 2016 |
| Nanocomp Limited | Information & communication | 2011 |
| Nanz Ltd | Wholesale & retail | 2026 |
| Naomi Mizrahi Limited | Arts & recreation | 2023 |
| Nara Sushi Limited | Hospitality | 2023 |
| Narik Private Limited | Administrative & support | 2023 |
| Narrativeworx Ltd | Professional & scientific | 2017 |
| Narsissi Property Lettings Ltd | Real estate | 2025 |
| Nascommerce Limited | Transport & logistics | 2021 |
| Nasef Limited | Health & social care | 2022 |
| Nash Accounting Management Ltd | Real estate | 2024 |
| Nashanthreads Ltd | Manufacturing | 2024 |
| Natalia Lash Studio Ltd | Other services | 2026 |
| Natasha Gwyther Virtual Assistant Ltd | Administrative & support | 2023 |
| Nate’S Consulting Ltd | Professional & scientific | 2018 |
| Nathan's Motor Ltd | Wholesale & retail | 2025 |
| Nathans Coins UK Limited | Wholesale & retail | 2026 |
| National Marketing Solutions Ltd | Administrative & support | 2024 |
| National Museum of the Royal Navy Trading | Wholesale & retail | 1976 |
| Natomo Concepts UK Ltd | Wholesale & retail | 2025 |
| Natural Burial Grounds Limited | Other services | 2021 |
| Natural Farm Produce Limited | Agriculture & fishing | 2018 |
| Natural Horse Supplies Limited | Wholesale & retail | 2013 |
| Natural Stone and Timber Ltd | Wholesale & retail | 2003 |
| Nature Nursery Limited | Education | 2015 |
| Nature's Data Ltd | Information & communication | 2020 |
| Nature’S Creations Limited | Agriculture & fishing | 2019 |
| Nautical and Nice Limited | Wholesale & retail | 2016 |
| Navaladi Ltd | Wholesale & retail | 2025 |
| Navigo Transport Limited | Transport & logistics | 2025 |
| Navis Consulting Limited | Extraterritorial | 2011 |
| Navitas Life Sciences Holdings Limited | Financial services | 2010 |
| Navitas Life Sciences Services Limited | Professional & scientific | 2021 |
| Navraj Food Limited | Hospitality | 2022 |
| Navy Rugby Limited | Other services | 2016 |
| Nayco Ltd | Wholesale & retail | 2026 |
| Nazari Skin Clinic Ltd | Other services | 2022 |
| Nbhc Developments Limited | Construction | 2023 |
| NBM Global Limited | Transport & logistics | 2016 |
| NC LDN Ltd | Wholesale & retail | 2020 |
| NC SRM Limited | Professional & scientific | 2015 |
| NDC Trans Ltd | Transport & logistics | 2017 |
| NDD Capital Ltd | Real estate | 2025 |
| Near ME Acupuncture Ltd | Extraterritorial | 2025 |
| Neathly Limited | Administrative & support | 2006 |
| Neckinger Group Ltd | Wholesale & retail | 2016 |
| Nector Networks Limited | Information & communication | 2024 |
| Need Street Food Limited | Hospitality | 2018 |
| Nehemiah Properties Limited | Real estate | 1994 |
| Neia Landscapes Limited | Administrative & support | 2016 |
| Neihma Sarl Limited | Construction | 2021 |
| Neil Potts Engineering Limited | Professional & scientific | 2014 |
| NEL Nails Ltd | Other services | 2023 |
| Nellyane Limited | Health & social care | 2023 |
| Neofront Ltd | Information & communication | 2023 |
| Neom Projects Ltd | Construction | 2024 |
| Neon Integrated Services Ltd | Construction | 2023 |
| Neon Numbers Limited | Professional & scientific | 2012 |
| Neptune Acrobatic Gymnastics Academy Ltd | Arts & recreation | 2025 |
| Neptune Associates Limited | Information & communication | 2002 |
| Neri Steelfixing Ltd | Construction | 2021 |
| Nerto Visual Limited | Information & communication | 2017 |
| Nesbitt & Sons Estate Agents Limited | Real estate | 2020 |
| Nest & Hill Properties Ltd | Real estate | 2026 |
| Nest Civil Services Limited | Professional & scientific | 2018 |
| Nest Holdings Southern Ltd | Financial services | 2026 |
| Netvero Ltd | Construction | 2026 |
| Networking Associates Ltd | Information & communication | 2010 |
| Neuro-Toys Ltd | Wholesale & retail | 2025 |
| Neuroly UK Limited | Information & communication | 2026 |
| Neuron Automation Limited | Professional & scientific | 2016 |
| Nevique Global Limited | Wholesale & retail | 2025 |
| New Build 4U Ltd | Construction | 2023 |
| New Care 24 Ltd | Administrative & support | 2018 |
| New DE Garden Ltd | Hospitality | 2025 |
| New Forest Flooring Limited | Construction | 2023 |
| New Hampshire Estates Ltd | Real estate | 1995 |
| New Hope Tech Ltd | Manufacturing | 2024 |
| New Infrastructure Support Group Ltd. | Information & communication | 1998 |
| New Inn Bedworth LLP | | 2018 |
| New Kwiki Mart Limited | Wholesale & retail | 2004 |
| New Leaf Lodgings Limited | Hospitality | 2025 |
| New Office Solutions Ltd | Wholesale & retail | 2021 |
| New Shahee Limited | Hospitality | 2000 |
| New Vision Media Ltd | Professional & scientific | 2016 |
| Newbubbles Ltd | Education | 2010 |
| Newcare Apartments Limited | Real estate | 2022 |
| Newcome RTM Company Ltd | Administrative & support | 2020 |
| Newcomen Road Garage Limited | Wholesale & retail | 2018 |
| Newland Properties (Portsmouth) Limited | Real estate | 2021 |
| Newlands Trading Limited | Financial services | 2025 |
| Newlife Plus Limited | Arts & recreation | 2025 |
| Newmanistics Ltd | Information & communication | 2025 |