| Nick Johnston Ltd. | Administrative & support | 2018 |
| Nicky Oconnor Developments Ltd | Professional & scientific | 2022 |
| Nicola Booth Design Ltd | Information & communication | 2023 |
| Nicole Bleu Limited | Wholesale & retail | 2022 |
| Nicolo Bolla Ltd | Information & communication | 2026 |
| Nigerian GPS UK Ltd | Other services | 2018 |
| Nightingale Cleaning Limited | Administrative & support | 1999 |
| NIK and Carole Limited | Professional & scientific | 2009 |
| Nikam Surgicals Ltd | Wholesale & retail | 2023 |
| Nimantran Ltd | Wholesale & retail | 2023 |
| Nine Lives Events Ltd | Professional & scientific | 2025 |
| Nine Minds Limited | Wholesale & retail | 2024 |
| Nineveh Medical Ltd | Health & social care | 2015 |
| Nineveh Property Ltd | Real estate | 2023 |
| Ninibro Ltd | Wholesale & retail | 2023 |
| Ninisina Limited | Education | 2024 |
| Nirosa Dens in Dente Limited | Health & social care | 2022 |
| Niteco Homes Ltd | Real estate | 2021 |
| Niteh Legacy Ltd | Health & social care | 2022 |
| Niti's Kitchen Ltd | Hospitality | 2025 |
| Niveo Ltd | Professional & scientific | 2022 |
| NJ Biopharma Consulting Limited | Professional & scientific | 2016 |
| NJ5 Properties Limited | Real estate | 2023 |
| NKD Mortgages Ltd | Financial services | 2026 |
| Nkike Ltd | Health & social care | 2017 |
| Nlab Architecture Ltd | Professional & scientific | 2015 |
| Nnelin Tech Limited | Information & communication | 2020 |
| NO 3 Investments Limited | Hospitality | 2013 |
| NO Sleep Group Limited | Wholesale & retail | 2019 |
| NO Tears Ltd | Administrative & support | 2015 |
| Noemic Limited | Information & communication | 2025 |
| Noman Design Consultancy Ltd | Professional & scientific | 2016 |
| Noor Garden Management Ltd | Households | 2022 |
| Norbury Property Group Limited | Real estate | 2025 |
| Norbury Property Management Ltd | Real estate | 2025 |
| Nordomatic Holding UK Ltd | Financial services | 2022 |
| Nordomatic UK Ltd | Professional & scientific | 2016 |
| Noreen Avenue Ltd | Real estate | 2021 |
| Norf Textiles Ltd | Wholesale & retail | 2026 |
| Norfolk House Maintenance Limited | Households | 1988 |
| Norman Audit Ltd | Professional & scientific | 2024 |
| Norsefx Ltd | Information & communication | 2015 |
| North East Autobody & Paint Ltd | Wholesale & retail | 2017 |
| North Parade Beauty Ltd | Other services | 2025 |
| North West Dermatology Limited | Health & social care | 2023 |
| North West Filling Ltd | Manufacturing | 2020 |
| North West MHA Solutions Ltd | Health & social care | 2017 |
| North West Padel & Pickle Limited | Arts & recreation | 2025 |
| North West Pre-Hospital Education Forum CIC | Education | 2025 |
| North West Telugu Sangam(Uk) | Other services | 2013 |
| Northedge Developments Ltd | Construction | 2017 |
| Northern Atlantic Energy Limited | Mining & quarrying | 2026 |
| Northern Chamber Orchestra Limited | Arts & recreation | 1979 |
| Northern Construction Services Ltd | Construction | 2020 |
| Northern Edge Property Ltd | Real estate | 2025 |
| Northern ESTATES72 Limited | Real estate | 2024 |
| Northern Fencing Limited | Construction | 2003 |
| Northern Grounds and Gardens Ltd | Administrative & support | 2024 |
| Northern Landscapes and Gardens Limited | Administrative & support | 2018 |
| Northern Markets Properties Ltd | Construction | 2004 |
| Northern Network Limited | Wholesale & retail | 2006 |
| Northern Nourish Ltd | Manufacturing | 2025 |
| Northern Powerhouse Land Limited | Real estate | 2017 |
| Northern Prospects Limited | Real estate | 2019 |
| Northern Reach Ltd | Professional & scientific | 2025 |
| Northern Sky Limited | Professional & scientific | 2017 |
| Northern Threads Lifestyle Limited | Wholesale & retail | 2006 |
| Northernville Property Ltd | Construction | 2024 |
| Northmere Digital Ltd | Information & communication | 2026 |
| Northwest Accomodations Ltd | Hospitality | 2023 |
| Northwest Hotels Limited | Hospitality | 2011 |
| Northwest Strategy Associates Ltd | Professional & scientific | 2023 |
| Northwests Hotel Limited | Hospitality | 2018 |
| Northwood (Derbyshire) Limited | Real estate | 2008 |
| Northwood (Sale) Limited | Real estate | 2003 |
| NOT TOO Tame Limited | Arts & recreation | 2020 |
| Nottootame Theatre Limited | Arts & recreation | 2010 |
| Nova Accountancy Solutions Ltd | Professional & scientific | 2026 |
| Nova Private Health Ltd | Health & social care | 2024 |
| Nova Talent Search Ltd | Administrative & support | 2025 |
| Novanest Ventures Ltd | Real estate | 2024 |
| Noveltech Ltd | Information & communication | 2023 |
| Novosignals Limited | Professional & scientific | 2025 |
| Novum Salons Limited | Other services | 2022 |
| Novus Computers Limited | Information & communication | 2010 |
| Novus Training Club Ltd | Arts & recreation | 2025 |
| NPF Safety Surfaces Limited | Construction | 2011 |
| NQC Holdings Limited | Information & communication | 2015 |
| NQC I Limited | Information & communication | 2015 |
| Nrpcoaching Ltd | Education | 2025 |
| Ns&G Ltd | Professional & scientific | 2013 |
| NSA International Ltd | Education | 2025 |
| NSA Testing Services Limited | Administrative & support | 2023 |
| Nsdt Group LLP | | 2024 |
| NSK Homes PVT Ltd | Real estate | 2025 |
| NT & PR Mckenna Ltd | Other services | 2011 |
| Nu-Texa Frictions Limited | Manufacturing | 1978 |
| Nuclear Hazard Consulting Ltd | Professional & scientific | 2024 |
| NUM1 Homes Ltd | Real estate | 2026 |
| NUM1 Supported Care Ltd | Health & social care | 2026 |