| Nexa Estates Ltd | Real estate | 2025 |
| Nexera Systems Ltd | Professional & scientific | 2026 |
| Nexgen Digital Solutions Ltd | Information & communication | 2026 |
| Nexgen Learn Ltd | Arts & recreation | 2023 |
| Nexgen Tennis Academy Ltd | Education | 2023 |
| Next Step Guide Ltd | Information & communication | 2026 |
| Nextcorr Ltd | Manufacturing | 2020 |
| Nextgen Gym and Fitness Ltd | Arts & recreation | 2025 |
| Nexus Apex Ltd | Wholesale & retail | 2018 |
| Nexus Divine Ltd | Other services | 2025 |
| Nexus Medical Imaging Limited | Health & social care | 2026 |
| NG Consults Ltd | Professional & scientific | 2024 |
| Nggc Ltd | Financial services | 2022 |
| Nhari Holdings Limited | Professional & scientific | 2018 |
| Niatom Limited | Information & communication | 2009 |
| Nibe Energy Systems Limited | Wholesale & retail | 2006 |
| NIC Holdings (UK) Limited | Professional & scientific | 1995 |
| Nicelabel International Limited | Information & communication | 2016 |
| Nicholas Hopkinson Architecture Limited | Professional & scientific | 2018 |
| Nicholas Patrick Limited | Information & communication | 2007 |
| Nick Flaxman Accountants Limited | Professional & scientific | 2010 |
| Nicola Jane Wallhead Ltd | Extraterritorial | 2024 |
| Nicola Manfredi Wealth Management Ltd | Financial services | 2012 |
| Nigde Ltd | Hospitality | 2019 |
| Nigel Geoffrey Ltd | Wholesale & retail | 2014 |
| Nigel James Limited | Real estate | 2008 |
| Nightingale Close (Kelstedge) Management Company Limited | Households | 2019 |
| Nightjar Bars Limited | Hospitality | 2024 |
| Nine Kingdoms Ltd | Hospitality | 2024 |
| Ninetydown Limited | Professional & scientific | 2021 |
| Nivara Care Limited | Health & social care | 2025 |
| Nixon Estate LLP | | 2023 |
| Nixon Property Holding Ltd | Real estate | 2020 |
| NJB Construction Engineering Limited | Construction | 2014 |
| NJD Marine & Power Generation Consultants Limited | Professional & scientific | 2010 |
| NJL Group Limited | Manufacturing | 2025 |
| NJM London Ltd | Construction | 2018 |
| Njuk Hair & Beauty Services Limited | Other services | 2023 |
| NLT Training Services Limited | Administrative & support | 1980 |
| NM Lettings Ltd | Real estate | 2023 |
| NM Property Maintenance Limited | Construction | 2015 |
| NMD Trading Company | Wholesale & retail | 2004 |
| NMD Trading Group Limited | Financial services | 2024 |
| Nmlt Limited | Other services | 2025 |
| NO 12 Victoria Terrace Limited | Administrative & support | 2025 |
| NO JOB TOE Small Ltd | Health & social care | 2003 |
| NO Longer Known Ltd | Manufacturing | 2025 |
| NO More Slips Limited | Wholesale & retail | 2001 |
| NO14RESIDENCES Ltd | Real estate | 2025 |
| Noah 7 Limited | Professional & scientific | 2016 |
| Noah Isaiah Shortland Ltd | Extraterritorial | 2025 |
| Noakes Financial Services Limited | Financial services | 2013 |
| Noble Motorsport Limited | Wholesale & retail | 2001 |
| Noble Rail Consulting Limited | Professional & scientific | 2012 |
| Nolan Builders Ltd | Construction | 2018 |
| Nomad HQ Limited | Wholesale & retail | 2018 |
| Nomad Motorhomes Limited | Other services | 2017 |
| Nomoreflats Ltd | Wholesale & retail | 2025 |
| Noor Eats Ltd | Information & communication | 2024 |
| Nora EVE Bridal Boutique Ltd | Wholesale & retail | 2013 |
| Norbert RGN Limited | Extraterritorial | 2018 |
| Nord-Essence Limited | Health & social care | 2024 |
| Norfolk Mews (Mansfield) Management Company Limited | Real estate | 2007 |
| North Derbyshire Youth Football League Limited | Arts & recreation | 2022 |
| North East Derbyshire Primary Care Network Limited | Health & social care | 2023 |
| North East Land Development Limited | Real estate | 2013 |
| North Eastern Derbyshire Business Developments Limited | Professional & scientific | 1993 |
| North Eastern Derbyshire Healthcare Limited | Health & social care | 2014 |
| North Electrical Mechanical Contractors Limited | Manufacturing | 2014 |
| North of the Equator Ltd | Wholesale & retail | 2025 |
| North Peak Investments Ltd | Construction | 2025 |
| North West Yacht Services Ltd | Manufacturing | 2022 |
| North Wingfield Miners Social Club Limited | Hospitality | 1992 |
| Northern Digital Academy Limited | Extraterritorial | 2020 |
| Northern Lights (Chesterfield) Limited | Extraterritorial | 1999 |
| Northern Oils Scotland Ltd | Wholesale & retail | 2016 |
| Northern Pipework Ltd | Extraterritorial | 2013 |
| Northern Scanning Ltd | Administrative & support | 2008 |
| Northern Strip Mining Limited | Mining & quarrying | 1981 |
| Northern Turbo Ltd | Professional & scientific | 2020 |
| Northmoor Livery Yard Ltd | Agriculture & fishing | 2020 |
| Northpoint Systems Ltd | Information & communication | 2025 |
| Northspire Engineering Limited | Manufacturing | 2014 |
| Northstar Talent Consulting Limited | Administrative & support | 2023 |
| Northwood Tissue (Chesterfield) Limited | Manufacturing | 2019 |
| Norton Management Services Limited | Financial services | 2015 |
| Norvex Solutions Ltd | Information & communication | 2026 |
| Nostrada Logs Ltd | Wholesale & retail | 2022 |
| Noteless Productions Limited | Arts & recreation | 2006 |
| Nottensing Ltd | Manufacturing | 2019 |
| Nottingham Digital Academy Limited | Extraterritorial | 2020 |
| Nottingham MMA Ltd | Arts & recreation | 2021 |
| Nottingham Pallets Limited | Transport & logistics | 1991 |
| Nottingham Skills Academy Limited | Real estate | 2025 |
| Notts Building Company Ltd | Construction | 2025 |
| Nourished Pets Ltd | Wholesale & retail | 2024 |
| Nova Care Consultancy Ltd | Professional & scientific | 2025 |
| Novamint Nutrition Ltd | Wholesale & retail | 2025 |
| Novaride Motors Limited | Wholesale & retail | 2025 |
| Novax Group Ltd | Financial services | 2023 |