| NAS UK Trading Ltd | Construction | 2018 |
| Nascon Engineering Contracting Ltd | Construction | 2024 |
| Nata Niwas Ltd | Real estate | 2024 |
| National Fast Food Limited | Hospitality | 2025 |
| National Fast Food Purley Ltd | Hospitality | 2025 |
| NAV Trading Ltd | Transport & logistics | 2017 |
| NAV2021 Ltd | Transport & logistics | 2022 |
| Navid PM Limited | Real estate | 2026 |
| Navigo Logistics Ltd | Transport & logistics | 2025 |
| Navigo Smart Technologies Limited | Wholesale & retail | 2023 |
| Nawab Boutique Limited | Wholesale & retail | 2018 |
| Nawer Trading Ltd | Transport & logistics | 2021 |
| Nayel Tradings Ltd | Wholesale & retail | 2026 |
| NAZ & SON Properties Ltd | Real estate | 2024 |
| Naza Properties Limited | Real estate | 2017 |
| Nazdani Ltd | Real estate | 2025 |
| Nazir & SON London Ltd | Transport & logistics | 2020 |
| Na’Eem Cultural Ltd | Real estate | 2024 |
| Nbkz Limited | Construction | 2024 |
| ND Masterspray Finishes Ltd | Construction | 2025 |
| NDM Solutions & Management Ltd | Professional & scientific | 2026 |
| Ndna Design Limited | Construction | 2019 |
| NDT Consulting Ltd | Administrative & support | 2020 |
| Neferu Ltd | Wholesale & retail | 2024 |
| Nefru Ltd | Information & communication | 2024 |
| Neils CAB Taxi Limited | Transport & logistics | 2025 |
| Nelson's Group Limited | Other services | 2019 |
| NEM Trading Ltd | Transport & logistics | 2020 |
| Nene Tuti Ltd | Wholesale & retail | 2020 |
| Nephew Building Services Limited | Construction | 1998 |
| Neptune Accountants Ltd | Professional & scientific | 2016 |
| Neron Packing Ltd | Other services | 2019 |
| NES Trading London Ltd | Transport & logistics | 2019 |
| Nest Housing Developments Limited | Construction | 2019 |
| Nestegg Group Ltd | Financial services | 2024 |
| Nestly Limited | Real estate | 2022 |
| Netball Coach UK Ltd | Arts & recreation | 2019 |
| Netlett Ltd | Administrative & support | 2017 |
| Neton Technologies UK Ltd | Wholesale & retail | 2023 |
| Neural-Symbolic Computing Ltd. | Information & communication | 2017 |
| New Cake Centre Ltd | Hospitality | 2017 |
| New Favriite Chicken Ltd | Hospitality | 2024 |
| New Friend Horsham Ltd | Hospitality | 2026 |
| New Lane 123 LLP | | 2021 |
| New Prim and Pampered Limited | Other services | 2015 |
| New State Services Ltd | Construction | 2025 |
| New Utility Ltd | Construction | 2024 |
| New Vision Artwork London Limited | Construction | 2019 |
| Nexa Global (U.K) Ltd | Other services | 2025 |
| Nexa Stratix Ltd | Wholesale & retail | 2026 |
| Nexo DMC Ltd | Administrative & support | 2026 |
| Next Chapter Tattoo & Piercing Studio Ltd | Other services | 2024 |
| Next Level Transport Ltd | Transport & logistics | 2012 |
| Nextdoor Stays Ltd | Hospitality | 2025 |
| Nextgen Plumb & Heat Ltd | Construction | 2025 |
| Nextmile Britain Logistics Ltd | Transport & logistics | 2026 |
| Nextsupport Ltd | Information & communication | 2026 |
| Nextwave Sloutions Limited | Information & communication | 2024 |
| Nexus Medicare Ltd | Health & social care | 2025 |
| NFM UK Ltd | Health & social care | 2008 |
| NGR & Co (Surrey) Ltd | Professional & scientific | 2016 |
| Nian Holdings Ltd | Financial services | 2026 |
| Nian Property Investment Ltd | Real estate | 2026 |
| Nick Barr Consulting Ltd | Information & communication | 2022 |
| Nicodem Limited | Administrative & support | 2025 |
| Nigh Braai Ltd | Information & communication | 2026 |
| Nikita Jethwa Ltd | Professional & scientific | 2025 |
| Nikki GUL Limited | Wholesale & retail | 2024 |
| Nile Capital PVT Ltd | Financial services | 2019 |
| Nimal Properties Ltd | Real estate | 2026 |
| Nims Enterprise Limited | Health & social care | 2013 |
| Nine Degrees Limited | Real estate | 2025 |
| NIO Styles London Homes Ltd | Real estate | 2021 |
| NIO Styles Ltd | Manufacturing | 2018 |
| Nisbot Limited | Health & social care | 2013 |
| Nishtar & Company Ltd | Health & social care | 2013 |
| Nixim Ltd | Information & communication | 2025 |
| NJ Rose Brickwork Limited | Construction | 2018 |
| NK2016 Trading Ltd | Other services | 2016 |
| Nkasa Solutions Ltd | Transport & logistics | 2016 |
| Nkrg Ltd | Real estate | 2020 |
| NLP Electrical Systems Ltd | Construction | 2014 |
| NLS Capital Investment Limited | Real estate | 2022 |
| NNN Holding Ltd | Financial services | 2025 |
| NNN2016 Trading Ltd | Transport & logistics | 2016 |
| NO 9 Concierge Limited | Wholesale & retail | 2021 |
| NO More Inkonvenience Ltd | Wholesale & retail | 2026 |
| Noble & Barnes Limited | Real estate | 2005 |
| Noble Corporate Travel Limited | Transport & logistics | 2023 |
| Noha Property Investment Ltd | Real estate | 2022 |
| Nole Inc Ltd | Wholesale & retail | 2024 |
| NOM Trading Ltd | Transport & logistics | 2025 |
| NON Fungable Token Art Ltd | Wholesale & retail | 2002 |
| Noor Ahmed Fazal Used Cars Ltd | Wholesale & retail | 2025 |
| Noor Estates Trading Ltd | Construction | 2018 |
| Noori MED Ltd | Health & social care | 2024 |
| Norbert Accountants Limited | Professional & scientific | 2013 |
| Norexa London Limited | Wholesale & retail | 2026 |
| North Skin Trading Limited | Wholesale & retail | 2015 |
| Northamptonshire Alliance Health Team Limited | Health & social care | 2026 |