| Newcombes Crediton (Bungalow) Limited | Construction | 2022 |
| Newcombes Crediton (New Builds) Limited | Construction | 2022 |
| Newcombes Crediton Limited | Construction | 2021 |
| Newcombes Crediton Management Company Limited | Households | 2023 |
| Newell Mortgage Services Ltd | Financial services | 2022 |
| Newells Building Services Ltd | Manufacturing | 2017 |
| Newestate Limited | Real estate | 1998 |
| Newforce Global Services Ltd | Information & communication | 2015 |
| Newgen Capital Limited | Information & communication | 2019 |
| Newgen Dwellings Limited | Real estate | 2018 |
| Newgen Infotech Limited | Information & communication | 2004 |
| Newgen Property Management Limited | Real estate | 2023 |
| Newlife Healthcare Services Limited | Health & social care | 2025 |
| Newline DP Limited | Households | 2023 |
| Newman Stratford Limited | Real estate | 2019 |
| Newmans Court Management Company Limited | Households | 1992 |
| Newmark Partners Ltd | Real estate | 2019 |
| Newmedica EYE Care Ltd | Public administration | 2017 |
| Newport Pagnell Estates Limited | Real estate | 2022 |
| Newport Pagnell Roofing Contractors Limited | | 1986 |
| Newport Pagnell Testing Station Limited | Wholesale & retail | 2002 |
| Newport Pagnell Town Community Football and Sports Club | Arts & recreation | 2022 |
| Newport Pagnell Town Football Club Limited | Arts & recreation | 2023 |
| Newport Pagnell Town Sports and Social Club Limited | Hospitality | 1986 |
| Newport Property Investments Ltd | Real estate | 2021 |
| Newrides Crew Ltd | Wholesale & retail | 2026 |
| Newstone Consulting Limited | Professional & scientific | 2025 |
| Newton Court Management (Knowlhill) Limited | Real estate | 2007 |
| Newton Developers Limited | Real estate | 2023 |
| Newton Leys Management Company Limited | Households | 2013 |
| Newton Longville Food & Wine Ltd | Wholesale & retail | 2019 |
| Newton Securities Limited | Construction | 1996 |
| Newton Smith Farms Ltd | Real estate | 2014 |
| Newturn Limited | Real estate | 1998 |
| NEX Power Ltd | Professional & scientific | 2010 |
| Nexa Cleaning Services Limited | Administrative & support | 2025 |
| Nexa Cloud Apps Ltd | Information & communication | 2026 |
| Nexaaris Labs Ltd | Information & communication | 2025 |
| Nexacora Ltd | Wholesale & retail | 2025 |
| Nexans Logistics Limited | Wholesale & retail | 1962 |
| Nexans UK Ltd | Professional & scientific | 1961 |
| Nexapharm Ltd | Wholesale & retail | 2025 |
| Nexarix Ltd | Information & communication | 2026 |
| Nexatech Global Ltd | Wholesale & retail | 2025 |
| Nexen 360 Ltd | Transport & logistics | 2025 |
| Nexgen Homes Ltd | Real estate | 2021 |
| Nexgen Tree Shelters Ltd | Manufacturing | 2020 |
| Nexi Technologies Limited | Information & communication | 2025 |
| Nexify MK Ltd | Manufacturing | 2025 |
| Nexleveljobs Finance Ltd | Financial services | 2024 |
| Nexo Vehicle Solutions Ltd | Transport & logistics | 2019 |
| Nexon Ltd | Wholesale & retail | 2020 |
| Nexora Consulting Group Limited | Information & communication | 2025 |
| NEXORA4 Ltd | Wholesale & retail | 2026 |
| Next GEN Smart Homes Limited | Construction | 2021 |
| Next Generation Group Ltd | Construction | 2018 |
| Next Level Advertisement Limited | Professional & scientific | 2026 |
| Next Level Angling Limited | Administrative & support | 2025 |
| Next Level Events Ltd | Administrative & support | 2025 |
| Next Level Moving Limited | Transport & logistics | 2018 |
| Next Level Security Ltd | Administrative & support | 2023 |
| Next Level Total Renovation Ltd | Construction | 2025 |
| Next Nest Limited | Real estate | 2021 |
| Next Phase Freedom Ltd | Information & communication | 2025 |
| Next Reality Dream Ltd | Real estate | 2025 |
| Next-Door Plumbing Ltd | Construction | 2023 |
| Nextera Energy Ltd | Real estate | 2022 |
| Nextera House Limited | Real estate | 2025 |
| Nextgen Automotive Limited | Transport & logistics | 2019 |
| Nextgen Digital Media Limited | Information & communication | 2018 |
| Nextgen IT Solutions Ltd | Information & communication | 2020 |
| Nextgen Strategies Ltd | Information & communication | 2024 |
| Nextgen Tech Resale & Repairs Ltd | Other services | 2025 |
| Nextgenaiforge Ltd | Information & communication | 2026 |
| Nextor Services Limited | Information & communication | 2017 |
| Nextora Ltd | Professional & scientific | 2024 |
| Nextra Ventures Limited | Professional & scientific | 2024 |
| Nexus Accounting Ltd | Information & communication | 2026 |
| Nexus Brand Solutions Ltd | Other services | 2023 |
| Nexus Fusion Limited | Information & communication | 2016 |
| Nexus Intelligence Ltd | Information & communication | 2013 |
| Nexus Interactive Ltd | Professional & scientific | 2023 |
| Nexus MK PCN Ltd | Health & social care | 2023 |
| Nexus Tax and Accounting Solutions Ltd | Professional & scientific | 2024 |
| Nexusphi Limited | Information & communication | 2024 |
| Nexuvo AI Limited | Information & communication | 2025 |
| Nexxo Limited | Wholesale & retail | 2014 |
| Nfg.Recruitment Ltd | Administrative & support | 2025 |
| Nfty Ltd | Professional & scientific | 2018 |
| NGC Property Developments Limited | Hospitality | 2022 |
| Ngcss CIC | Information & communication | 2026 |
| Ngoco Holdings Ltd | Real estate | 2019 |
| Ngolaad Limited | Information & communication | 2013 |
| Ngoni Private Limited | Health & social care | 2015 |
| NGS Training Ltd | Education | 2025 |
| NGT Associates Limited | Professional & scientific | 2016 |
| NGV Unique Limited | Transport & logistics | 2016 |
| Nhbc Building Control Services Limited | Administrative & support | 1985 |
| Nhbc Pension Trustee Limited | Financial services | 1991 |
| Nhbc Services Limited | Other services | 1995 |