| New London Construction Ltd | Construction | 2017 |
| New Look Glazing Ltd | Construction | 2015 |
| New ME Care Services Limited | Health & social care | 2023 |
| New Option Support Limited | Administrative & support | 2021 |
| New Ortaklar Ltd | Hospitality | 2019 |
| New Point Services Ltd | Real estate | 2025 |
| New Romford Motors Limited | Wholesale & retail | 2024 |
| New Season Takeaway Limited | Hospitality | 2023 |
| New Student Biryani Ltd | Hospitality | 2023 |
| New Web Order Ltd | Information & communication | 2024 |
| Newark Trading Ltd | Wholesale & retail | 2024 |
| Newbury Rentals FH Limited | Real estate | 2023 |
| Newbury Rentals Limited | Real estate | 2023 |
| Newby Enterprises Limited | Professional & scientific | 2023 |
| Newcastle Language Academy Limited | Education | 2023 |
| Newell-Grant Ltd | Transport & logistics | 2024 |
| Newera Code Genesis Limited | Information & communication | 2025 |
| Newgen Estates Ltd | Real estate | 2023 |
| Newgen Residential Ltd | Construction | 2025 |
| NEWGEN26 Limited | Financial services | 2026 |
| Newhaven Consultancy Limited | Professional & scientific | 2018 |
| Newland Jones Limited | Professional & scientific | 2012 |
| Newlands Residents Limited | Households | 1999 |
| Newlinks Search Limited | Administrative & support | 2025 |
| Newman HR Limited | Administrative & support | 2013 |
| Newness Properties Ltd | Real estate | 2024 |
| Newport Projects Limited | Professional & scientific | 2021 |
| Newtube Ltd | Wholesale & retail | 2021 |
| Newway Domestic Appliances Ltd | Wholesale & retail | 2021 |
| Nexa X Ltd | Wholesale & retail | 2025 |
| Nexadeliver Ltd | Transport & logistics | 2025 |
| Nexcom Investments Limited | Real estate | 2025 |
| Nexgen Beauty Ltd | Wholesale & retail | 2026 |
| Nexgen Property Investments Limited | Real estate | 2018 |
| Nexgen QA Solutions Ltd | Information & communication | 2010 |
| Nexjen Solution Ltd | Professional & scientific | 2024 |
| Nexmart Ltd | Wholesale & retail | 2024 |
| Nexmatrix Technologies Limited | Information & communication | 2024 |
| Nexol Services Power Ltd | Administrative & support | 2025 |
| Nexon Technical Solutions Limited | Construction | 2023 |
| Nexora Biosciences Ltd | Manufacturing | 2025 |
| Nexora Digital Innovation & Solutions Ltd | Wholesale & retail | 2025 |
| Nexora Partnerships Ltd | Professional & scientific | 2026 |
| Nexora Prime Limited | Administrative & support | 2026 |
| Next Car 4 U Ltd | Wholesale & retail | 2020 |
| Next Chapter Construction Ltd | Construction | 2025 |
| Next Consulting Limited | Information & communication | 2010 |
| Next Day Engineering Ltd | Wholesale & retail | 2012 |
| Next GEN Social CIC | Education | 2025 |
| Next Ggen Ltd | Construction | 2026 |
| Next Level Revenue Ltd | Professional & scientific | 2017 |
| Next Noor Ltd | Information & communication | 2024 |
| Next Step London Limited | Administrative & support | 2025 |
| Next Stop Facilities Limited | Construction | 2025 |
| Nextadvantage Ltd | Information & communication | 2020 |
| Nextayah Limited | Information & communication | 2025 |
| Nextdoor Furnishers Ltd | Wholesale & retail | 2022 |
| Nexteat Ltd | Wholesale & retail | 2023 |
| Nextgen Global Education Ltd | Education | 2024 |
| Nextgen Nova Limited | Wholesale & retail | 2026 |
| Nextgen Property Corporation Ltd | Real estate | 2024 |
| Nextgenowa Property Holdings Limited | Real estate | 2023 |
| Nextport Distributions Ltd | Wholesale & retail | 2025 |
| Nexus Ecomerce Ltd | Wholesale & retail | 2025 |
| Nexus Empire Ltd | Wholesale & retail | 2024 |
| Nexus Equity Ltd | Financial services | 2024 |
| Nexus Strategic Limited | Professional & scientific | 2025 |
| Nexus Trade London Limited | Wholesale & retail | 2023 |
| Nexus Vice Ltd | Wholesale & retail | 2025 |
| Nexvo Limited | Wholesale & retail | 2025 |
| Nexx Estate Ltd | Information & communication | 2023 |
| Neyzenn Street Food & Catering Ltd | Wholesale & retail | 2020 |
| NG Consultancy Essex Ltd | Health & social care | 2019 |
| NGV Consulting Ltd | Professional & scientific | 2026 |
| NHB Studio Ltd | Manufacturing | 2021 |
| NIA Enterprise Limited | Wholesale & retail | 2019 |
| Niama Ltd | Administrative & support | 2024 |
| Niazi Legal Limited | Professional & scientific | 2017 |
| Nice Food & Beverages Ltd | Hospitality | 2023 |
| Nice Systems Consultancy Limited | Information & communication | 2015 |
| Niche Sporting Experiences Limited | Administrative & support | 2021 |
| Nichem Limited | Public administration | 2023 |
| Nichetechsolutions Limited | Information & communication | 2019 |
| Nichita Ltd | Professional & scientific | 2023 |
| Nicholas Adams Safety Solutions Limited | Construction | 2014 |
| Nicholls & Clarke Glass Limited | Manufacturing | 1938 |
| Nicholls & Clarke Limited | Professional & scientific | 1900 |
| Nichols Groundworks Limited | | 2014 |
| Nick & SON Carpentry Ltd | Construction | 2017 |
| Nick and DAN Lambev Limited | Construction | 2016 |
| Nick Gradica Contracts Ltd | Other services | 2013 |
| Nick S Builders Ltd | Construction | 2025 |
| Nickbg Ltd | Construction | 2015 |
| Nicklle. Ltd | Construction | 2018 |
| Nicks Tyre Services Limited | Wholesale & retail | 1987 |
| Nicks Waste Removal Services Limited | Water & waste | 2025 |
| Nicky News Limited | Wholesale & retail | 2018 |
| Nico Couriers Ltd | Transport & logistics | 2025 |
| Nicobond Limited | Extraterritorial | 1991 |
| Nicolas LEE Limited | Construction | 2023 |