| Northcote Properties Ltd | Real estate | 2019 |
| Northel International Ltd | Manufacturing | 2026 |
| Northern Advocacy Group CIC | Education | 2024 |
| Northern Clan Investments Ltd | Financial services | 2026 |
| Northern Clothing Wholesale Limited | Wholesale & retail | 2026 |
| Northern Flux Ltd | Wholesale & retail | 2025 |
| Northern Force Security Guarding Ltd | Administrative & support | 2023 |
| Northern Lights Studio Productions Ltd | Information & communication | 2025 |
| Northern Quarter Properties Ltd | Real estate | 2020 |
| Northern Roots Housing Limited | Real estate | 2026 |
| Northern Star Limited | Real estate | 2017 |
| Northern Tours Limited | Administrative & support | 2015 |
| Northland Estates Ltd | Other services | 2017 |
| Northlet Management Ltd | Real estate | 2018 |
| Northlet Refurb Ltd | Construction | 2021 |
| Northlight Care Ltd | Health & social care | 2026 |
| Northlight Hub Light Ltd | Real estate | 2022 |
| Northlight Relaxation Ltd | Real estate | 2022 |
| Northquarry Ltd | Real estate | 2000 |
| Northshore Legal Services Ltd | Professional & scientific | 2020 |
| Northstar Manchester Limited | Other services | 2018 |
| Northumberland Library CIC | Arts & recreation | 2026 |
| Northward Motion Ltd | Wholesale & retail | 2026 |
| Northway Trading Limited | Wholesale & retail | 2013 |
| Northwell Building Services Ltd | Extraterritorial | 2015 |
| Northwest Car Hire and Claims Ltd | Administrative & support | 2016 |
| Northwest Estates Limited | Real estate | 2018 |
| Northwest Law Services Limited | Other services | 1982 |
| Northwest Resin Installations Limited | Construction | 2017 |
| Northwich Witton Estates Limited | Other services | 2023 |
| Northwick Advisory Limited | Construction | 2025 |
| Northwold 28 Ltd | Real estate | 2022 |
| Norton Joinery (NW) Ltd | Construction | 2026 |
| Norty BUT Kosher Ltd | Hospitality | 2026 |
| Norwich Estates Ltd | Other services | 2017 |
| Norwood Farm Investment Co Limited | Real estate | 2025 |
| Norwood Farm SPV Limited | Real estate | 2025 |
| Norwood Holdings Limited | Extraterritorial | 2021 |
| Nosinger Ltd | Wholesale & retail | 2024 |
| NOT That Asian Theatre C.I.C. | Arts & recreation | 2026 |
| Nothing BUT Clothing Ltd | Wholesale & retail | 2021 |
| Nothing New 2 Wear Limited | Wholesale & retail | 2013 |
| Notting Hill College Ltd | Education | 2004 |
| Nova 45 Ltd | Real estate | 2026 |
| Nova CAP X Ltd | Administrative & support | 2023 |
| Nova Finds Ltd | Wholesale & retail | 2025 |
| Nova Marketplace (MCR) Ltd | Wholesale & retail | 2026 |
| Nova Properties (N.W) Ltd | Real estate | 2021 |
| Novaark Global Ltd | Professional & scientific | 2026 |
| Novisey Ltd | Information & communication | 2025 |
| Noyam Ltd | Transport & logistics | 2025 |
| Nozun Ltd | Information & communication | 2025 |
| NQ Design & Build Limited | Construction | 2025 |
| NS Estates Ltd | Real estate | 2021 |
| NSA Co Ltd | Wholesale & retail | 2022 |
| Nsam Legal Limited | Professional & scientific | 2023 |
| NSM Integpsychotherapy Ltd | Health & social care | 2024 |
| NSM Law Limited | Professional & scientific | 2026 |
| NSM Ventures Limited | Information & communication | 2020 |
| NSP Vape Limited | Wholesale & retail | 2025 |
| Nspandco Limited | Real estate | 2020 |
| Nubira Ltd | Administrative & support | 2026 |
| Nucomp Builders Limited | | 1981 |
| Nucrox Limited | Information & communication | 2025 |
| Numar Global Ltd | Real estate | 2021 |
| Nuna Barber Ltd | Other services | 2021 |
| Nuova Habitat Ltd | Construction | 2025 |
| Nurish AI Ltd | Information & communication | 2026 |
| Nurtura Staffing Ltd | Administrative & support | 2024 |
| Nurturing Investment Ltd | Real estate | 2024 |
| Nusrat Bashir Properties Ltd | Real estate | 2024 |
| Nutanix DC UK Limited | Other services | 2019 |
| Nutanix Limited | Administrative & support | 2012 |
| Nutri-Nut Ltd | Manufacturing | 2025 |
| Nutricalc Limited | Information & communication | 2013 |
| Nutriente Ltd | Manufacturing | 2025 |
| Nutrimanager Ltd | Health & social care | 2025 |
| NVB Ltd | Real estate | 2017 |
| NW GAS and Electrical Ltd | Construction | 2026 |
| NW Media Ltd | Other services | 2012 |
| NW Property Signs Ltd | Other services | 2016 |
| NW Worktop Repairs Ltd | Construction | 2026 |
| NWA Cleaning Services Limited | Administrative & support | 2015 |
| NWE Edtech Global Consult Ltd | Professional & scientific | 2025 |
| NWE Waste Services Limited | Water & waste | 2018 |
| NWL (Group) Limited | Professional & scientific | 2013 |
| NX7 Ltd | Information & communication | 2024 |
| Nxloungemcr Ltd | Other services | 2025 |
| NXP Laboratories UK Limited | Manufacturing | 1996 |
| Nynex Ltd | Professional & scientific | 2019 |
| Nyora Data Ltd | Information & communication | 2026 |
| O&G Trading Ltd | Administrative & support | 2023 |
| O'Gara Group Ltd | Extraterritorial | 2025 |
| O'Neill Software Ltd | Information & communication | 2023 |
| O.G Property Manchester Ltd | Hospitality | 2025 |
| O.K.K.Priests CIC | Education | 2022 |
| O.O.S.A Consulting UK Ltd | Real estate | 2025 |
| O.Re Interior Design Limited | Real estate | 2020 |
| OAA1 Ltd | Health & social care | 2025 |
| Oak & Glen Ltd | Real estate | 2017 |