| Nexa Daily Ltd | Wholesale & retail | 2025 |
| Nexa Exotic Ltd | Wholesale & retail | 2024 |
| Nexaflow Solutions Ltd | Information & communication | 2025 |
| Nexoread Ltd | Information & communication | 2026 |
| Next Generation Shutters Ltd | Manufacturing | 2021 |
| Next Step Italy Advisory Ltd | Professional & scientific | 2026 |
| Nextstop Journeys Ltd | Administrative & support | 2025 |
| Nexus Building & Maintenance Limited | Construction | 2015 |
| Nexus Building Contractors Limited | Construction | 2024 |
| Nexus Shield Ltd | Information & communication | 2026 |
| Nial Property Management Limited | Real estate | 2025 |
| Niazi Investments Limited | Real estate | 2021 |
| Nice and Simple Ltd | Administrative & support | 2008 |
| Nicely Holdings Limited | Other services | 2021 |
| Nicely Network Limited | Administrative & support | 2017 |
| Nichalls Ltd. | Construction | 2015 |
| Nicholas James Care Homes Ltd | Health & social care | 2001 |
| Nicholas James Care Ltd | Health & social care | 2014 |
| Nicholas James Consult Limited | Administrative & support | 2018 |
| Nicholas James Development Limited | Administrative & support | 2019 |
| Nicholas James Health Care Ltd | Health & social care | 2014 |
| Nichols Lifts Ltd | Construction | 2025 |
| Nicola Askham Ltd | Professional & scientific | 2011 |
| NIG Health Ltd | Health & social care | 2025 |
| Nights OUT Tours Ltd | Administrative & support | 2022 |
| Nijitec Limited | Information & communication | 2016 |
| Nilam Real Estates Limited | Real estate | 2019 |
| Nippers Home and Building Services Limited | Construction | 2021 |
| Nivash Petroleum Limited | Wholesale & retail | 2015 |
| NJT (South East) Holdings Limited | Administrative & support | 2023 |
| NJT Contractors Limited | Transport & logistics | 2024 |
| NJT Ipac Ltd | Hospitality | 2024 |
| NK Cornerstone Limited | Real estate | 2010 |
| NK Mara Limited | Transport & logistics | 2021 |
| Nkky Services Limited | Health & social care | 2012 |
| NKO Trans Ltd | Transport & logistics | 2026 |
| NKR Project Services Ltd | Professional & scientific | 2026 |
| NLY Services Ltd | Wholesale & retail | 2019 |
| NM20 Ltd | Real estate | 2017 |
| NMA Contracting Ltd | Construction | 2019 |
| NO Days OFF Transport Ltd | Transport & logistics | 2026 |
| NOA Water Ltd | Manufacturing | 2019 |
| Noah's ARK Property Limited | Households | 2026 |
| Noakes Holdings Limited | Real estate | 2024 |
| Noakes Incorporating Ltd | Construction | 2022 |
| Nobis Bay Ltd | Wholesale & retail | 2020 |
| Noble Vintners Limited | Administrative & support | 2011 |
| Nocc Ltd | Health & social care | 2002 |
| Noesis Technology Consulting Limited | Information & communication | 2017 |
| Nofutz Ltd | Extraterritorial | 2016 |
| Noga Interiors Limited | Construction | 2021 |
| Noir (UK) Limited | Manufacturing | 2025 |
| Nolan Funeral Services Limited | Other services | 2025 |
| Nolrak Limited | Information & communication | 2025 |
| Nomos Safety Ltd | Public administration | 2024 |
| Nonna-Anna 2.0 Ltd | Hospitality | 2025 |
| Nonna-Anna Ltd | Hospitality | 2023 |
| Nonpenso Ltd | Real estate | 1999 |
| Noor Orchard Investments Ltd | Hospitality | 2025 |
| Nopenso Limited | Extraterritorial | 2018 |
| Norbond Limited | Professional & scientific | 2016 |
| Norense Eavers (Asset Holdings and Management) Ltd | Administrative & support | 2017 |
| Norris Support Services Ltd | Administrative & support | 2019 |
| NORT3Y Productions Ltd | Professional & scientific | 2020 |
| North Laine Trawlerman Ltd | Hospitality | 2023 |
| Northern Audio Visual Services Ltd | Information & communication | 2016 |
| Northern Counties Leisure Limited | Arts & recreation | 1996 |
| Northgrove Land Ltd | Construction | 2005 |
| Northwood Security and Collection Limited | Administrative & support | 2023 |
| Nosis Publishing Ltd | Information & communication | 2024 |
| Noted by Nature Ltd | Wholesale & retail | 2025 |
| Nova Reach Media Ltd | Professional & scientific | 2026 |
| Nova Skye Construction Limited | Construction | 2017 |
| Novacon Ltd | Construction | 2024 |
| Novastride Living Ltd | Health & social care | 2026 |
| Novia Furniture Ltd | Wholesale & retail | 2020 |
| NOW Go Eco Limited | Professional & scientific | 2024 |
| Npina Ltd | Construction | 2021 |
| NPS Properties Limited | Real estate | 2003 |
| Npva Green Consultancy Ltd | Professional & scientific | 2023 |
| NRG Technology Ltd | Information & communication | 2021 |
| NRR Commercial Ltd | Construction | 2023 |
| NRS Plant Ltd | Construction | 2014 |
| NRV Commercial Repairs Limited | Wholesale & retail | 2008 |
| NS Construction Services Limited | Administrative & support | 2018 |
| NS Integrated Solutions Ltd | Information & communication | 2018 |
| Nsfr Holdings Ltd | Financial services | 2025 |
| NSP Legal Consulting Limited | Professional & scientific | 2020 |
| Ntms Services Ltd | Professional & scientific | 2025 |
| Nubian Center Ltd. | Wholesale & retail | 2020 |
| Nucom Ventures Limited | Wholesale & retail | 2015 |
| Nuel's Academy Limited | Education | 2020 |
| Nuevo Links Ltd | Hospitality | 2013 |
| Nuform Construction Limited | Construction | 2017 |
| NUMER8 Limited | Professional & scientific | 2023 |
| Numeric Software Limited | Information & communication | 2000 |
| Numericalz Admin Services Ltd | Other services | 2022 |
| Numericalz Advisers Limited | Professional & scientific | 2019 |
| Nuri Group UK Ltd | Administrative & support | 2023 |
| Nurturall LLP | | 2012 |