| Mădălina Logistics Ltd | Transport & logistics | 2023 |
| N & a UK Property Ltd | Real estate | 2025 |
| N & M Building Services Ltd | Construction | 2010 |
| N & W Service Ltd | Manufacturing | 2013 |
| N B Groundworks Ltd | Construction | 2017 |
| N D Mullett Plumbing & Heating Limited | Construction | 2008 |
| N G L Leisure Limited | Administrative & support | 2010 |
| N K Spinks Limited | Construction | 2011 |
| N M Collins Ltd | Construction | 2007 |
| N T Transport Services Ltd | Transport & logistics | 2020 |
| N W T Distribution Limited | Wholesale & retail | 1983 |
| N&Abrinkley Ltd | Construction | 2020 |
| N.E.L. Maintenance Limited | Construction | 2001 |
| N.O.N. Trans Ltd | Transport & logistics | 2018 |
| N.P.H. Developments Holdings Ltd | Financial services | 2024 |
| N.P.H. Developments Ltd | Construction | 2003 |
| N8 Beautique Ltd | Other services | 2024 |
| Naap Food Ltd | Hospitality | 2026 |
| Nabiflo Limited | Professional & scientific | 2022 |
| Nabihayaseen Ltd | Wholesale & retail | 2026 |
| NABSTARR1 Ltd | Administrative & support | 2023 |
| Nacky Ltd | Real estate | 2025 |
| Nacton Barber Ltd | Other services | 2020 |
| Nacton Convenience Store Ltd | Other services | 2022 |
| Nacton Fried Chicken Ltd | Hospitality | 2018 |
| Nacton Hand Car Wash Limited | Wholesale & retail | 2025 |
| Nacton Limited | Manufacturing | 1989 |
| Nacton Pet Supplies Ltd | Wholesale & retail | 2016 |
| Nadir Minicab Ltd | Transport & logistics | 2020 |
| Nail & Beauty Ltd | Other services | 2023 |
| NAJ Fish Bar Ltd | Hospitality | 2017 |
| Najah Assets Limited | Construction | 2024 |
| NAM Groceries Ltd | Wholesale & retail | 2020 |
| Nanaimo Estates Ltd | Real estate | 2024 |
| Nandhus Kitchen Limited | Hospitality | 2026 |
| Nando's Transport Ltd | Transport & logistics | 2025 |
| Nanhua 666 Ltd | Hospitality | 2021 |
| Nani Investments Ltd | Information & communication | 2022 |
| Nani Property Investments Ltd | Real estate | 2024 |
| Nanny Goat Games Ltd | Information & communication | 2017 |
| Nanny Paris Ltd | Education | 2022 |
| Nanotech Pristine Ltd | Wholesale & retail | 2016 |
| Nanyuki Properties Limited | Financial services | 2023 |
| Nappstech Limited | Information & communication | 2024 |
| Naptune Limited | Transport & logistics | 2023 |
| Nara Holdings Limited | Financial services | 2021 |
| Nara Homes Ltd | Real estate | 2026 |
| Narraxis Group Limited | Information & communication | 2025 |
| Nash Automotive Solutions Limited | Professional & scientific | 2006 |
| Nash Commercials Ltd | Wholesale & retail | 2022 |
| Natalie Canning Ltd | Manufacturing | 2022 |
| Nathan Paralegals and Company LP | | 2020 |
| National Engineering Services Ltd | Manufacturing | 2025 |
| National EPC Limited | Professional & scientific | 2020 |
| National Trades Ltd | Administrative & support | 2007 |
| National Warrant Services Ltd | Other services | 2023 |
| Nationwide Beds Ltd | Wholesale & retail | 2021 |
| Nationwide Community Care (Holdings) Limited | Health & social care | 2011 |
| Nationwide Fire & Security Solutions Ltd | Public administration | 2019 |
| Nationwide Metal Recycling Limited | Water & waste | 2007 |
| Natsay Traders Limited | Wholesale & retail | 2026 |
| Natural Capital Group Limited | Professional & scientific | 2021 |
| Natural Evolution Ltd | Wholesale & retail | 2014 |
| Natural Health Surrey Limited | Health & social care | 2018 |
| Naturally Eden Ltd | Manufacturing | 2025 |
| Naturally Glam Hair Studios Ltd | Other services | 2020 |
| Naturepack UK Ltd | Extraterritorial | 2019 |
| Natures Instinct Ltd | Wholesale & retail | 2023 |
| Natures Mystery Ltd | Wholesale & retail | 2024 |
| Natures World Limited | Wholesale & retail | 1992 |
| Navicra Logic Ltd | Information & communication | 2026 |
| Navigator 45 Ltd | Hospitality | 2023 |
| Navigator Coaches Ltd | Transport & logistics | 2019 |
| Navis TM Planning Ltd | Professional & scientific | 2026 |
| Navli IT Labs Limited | Wholesale & retail | 2026 |
| Nawracy Cultural Centre | Education | 2010 |
| Nayland Care Agency Ltd | Administrative & support | 2002 |
| NB & JC Limited | Construction | 2020 |
| NBC (Administration Services) Limited | Financial services | 2015 |
| NBE Express Ltd | Wholesale & retail | 2024 |
| NBW Properties Limited | Real estate | 2022 |
| NC Drylining Ltd | Construction | 2021 |
| NC Office Ltd | Real estate | 2021 |
| NCR Consultancy Services Ltd | Professional & scientific | 2015 |
| ND Beauty Treatment Ltd | Other services | 2021 |
| ND HGV Limited | Transport & logistics | 2016 |
| Neaby Ltd | Information & communication | 2026 |
| Neale Developments Ltd | Administrative & support | 2020 |
| Neale Group Ltd | Financial services | 2020 |
| Neale Property Management Ltd | Administrative & support | 2020 |
| Nearly Festival Bury Ltd | Arts & recreation | 2018 |
| Nearly Festival Colchester Ltd | Arts & recreation | 2018 |
| Nearly Festival MB Ltd | Arts & recreation | 2018 |
| Nearly Festival OB Ltd | Arts & recreation | 2018 |
| Neatrun Investments Ltd | Real estate | 2015 |
| Neatrun Properties Limited | Construction | 1989 |
| Nebylucian Ltd | Administrative & support | 2016 |
| Nedguk Limited | Financial services | 2021 |
| Need It.Property and Investments Ltd | Real estate | 2024 |
| Needham (Building Contractors) Limited | Construction | 1991 |