| N B Engineering Consultants Limited | Administrative & support | 1995 |
| N Hamand Limited | Construction | 2001 |
| N P Joinery Ltd | Construction | 2005 |
| N-Able Holdings Ltd | Financial services | 2005 |
| N-Able Property Services Ltd | Construction | 2005 |
| Nadal Newco Limited | Financial services | 2017 |
| Nalco Investments UK Limited | Manufacturing | 1990 |
| Nalco Limited | Manufacturing | 1958 |
| Nantwich Electrical Limited | Construction | 2003 |
| Nantwich Motor Company Limited | Wholesale & retail | 2011 |
| Narasimha Ltd | Real estate | 2016 |
| Natara Solutions Ltd | Professional & scientific | 2006 |
| Natosa Ltd | Real estate | 2020 |
| NAZ Accountancy Limited | Professional & scientific | 2003 |
| Neal Hayes Mortgages Ltd | Financial services | 2006 |
| Neehaarika Ltd | Information & communication | 2022 |
| Neil Morland Housing Consultant Ltd | Professional & scientific | 2011 |
| Neil P Harrison Limited | Health & social care | 2004 |
| Nemo Autos Limited | Wholesale & retail | 2002 |
| Neotek Engineering and Design Limited | Professional & scientific | 2006 |
| NET Growth Limited | Hospitality | 2006 |
| Netbay Computing Limited | Information & communication | 2003 |
| Neuromuscular Centre | Professional & scientific | 1993 |
| New Morning Foods Limited | Extraterritorial | 1987 |
| New Sweet Sensation Limited | Arts & recreation | 1992 |
| Newbrook Engineering (Crewe) Limited | Manufacturing | 1982 |
| Newfound Energy Limited | Professional & scientific | 2002 |
| Newhampton Contractors Limited | | 1974 |
| Newland Engineering Company Limited | Manufacturing | 1962 |
| Newline Property Limited | Real estate | 2003 |
| Newton Commercial Vehicles Limited | Wholesale & retail | 1975 |
| Newton Court (Hyde) Limited | Extraterritorial | 2009 |
| Newton Tesla (Electric Drives) Limited | Manufacturing | 1987 |
| Newyork International Ltd | Wholesale & retail | 2026 |
| Nextgov Holdings Ltd | Financial services | 2025 |
| Nexus Fit-Out Ltd | Construction | 2019 |
| Nicholls and O'Reilly Properties Limited | Real estate | 2003 |
| Nick Brajkovich Limited | Professional & scientific | 2002 |
| Nick Dunning Design Management Limited | Professional & scientific | 2016 |
| Nick Oldfield Limited | Professional & scientific | 2003 |
| Nicorna Limited | Professional & scientific | 2005 |
| Nigel Naylor (Electrical Services) Limited | Construction | 2003 |
| Nigel Oglethorpe Auto Services Limited | Wholesale & retail | 2005 |
| Nigel Worthington Ltd | Construction | 2003 |
| Nina's Nursery (Offerton) Limited | Health & social care | 2004 |
| Ninos Gents Hair Concept Ltd | Other services | 2023 |
| Niphos Metal Finishing Co. Limited | Manufacturing | 1972 |
| Niro Engineering Limited | Professional & scientific | 2007 |
| NMC Property Limited | Real estate | 2014 |
| Nobridge Limited | Other services | 2007 |
| Node Recruitment Limited | Administrative & support | 2020 |
| Noel Cochrane Associates Limited | Construction | 2003 |
| Nomads Dramatic Society Limited(The) | Arts & recreation | 1963 |
| NON Entry Systems Limited | Manufacturing | 1995 |
| Norlec Limited | Construction | 2002 |
| North Cheshire Consultants Limited | Professional & scientific | 1987 |
| North East Nurseries Limited | Health & social care | 2013 |
| North Park Investments Limited | Real estate | 1960 |
| North Wales Land Developments Limited | Professional & scientific | 1991 |
| North West Property Maintenance & Management Ltd | Construction | 2020 |
| North Western Caravans Ltd | Wholesale & retail | 2004 |
| North Western Farmers Limited | Professional & scientific | 1960 |
| North Western Materials Handling Limited | Manufacturing | 2002 |
| Northern Energy OIL Limited | Wholesale & retail | 2010 |
| Northern Green Limited | Real estate | 2000 |
| Northern Polymer and Plastics Holdings Ltd | Wholesale & retail | 2022 |
| Northern Psychiatry Consultants Limited | Health & social care | 2007 |
| Northfort Limited | Construction | 1980 |
| Northpoint Group Ltd. | Manufacturing | 2007 |
| Northwich Tyres and Auto Care Limited | Wholesale & retail | 2004 |
| Nova Double Glazing Systems Limited | Manufacturing | 2006 |
| Novak Developments Limited | Real estate | 2022 |
| Novaplus Limited | Construction | 2007 |
| Novel Power Tech Ltd | Information & communication | 2021 |
| Novelis Europe Holdings Limited | Professional & scientific | 2004 |
| NOW Property Solutions Limited | Real estate | 2002 |
| NP Landscapes Ltd | Administrative & support | 2023 |
| Nuco Holdings Limited | Financial services | 2021 |
| Nuera Group Ltd | Construction | 2023 |
| Numac Engineering Limited | Manufacturing | 1991 |
| Numbers Consultancy Limited | Professional & scientific | 2006 |
| Nutriceut Limited | Wholesale & retail | 2006 |
| Nvsn Consulting Ltd | Professional & scientific | 2003 |
| NW Business Solutions Limited | Information & communication | 1988 |
| NWF Agriculture Holdings Limited | Financial services | 1999 |
| NWF Agriculture Limited | Manufacturing | 1973 |
| NWF Distribution Holdings Limited | Financial services | 1999 |
| NWF Fuels Holdings Limited | Financial services | 1999 |
| NWF Fuels Limited | Wholesale & retail | 1973 |
| NWF Group PLC | Professional & scientific | 1988 |
| NWF Limited | Professional & scientific | 1965 |
| Nxtn Ltd | Administrative & support | 2025 |
| O'Neill Hotels Limited | Extraterritorial | 2004 |
| Oakfields Children's Care Limited | Health & social care | 2005 |
| Oakley Wharf (Portmadoc) Limited | Households | 1976 |
| Oapd Asset Holdings Ltd | Financial services | 2025 |
| Oapd Group Ltd | Financial services | 2025 |
| Oare's Coaches Ltd | Transport & logistics | 1994 |
| Octave Design Services Limited | Professional & scientific | 2015 |
| Octave Financial Planning Limited | Professional & scientific | 2005 |