| N J R Farming Limited | Agriculture & fishing | 1997 |
| N K Ruban Stores Ltd | Wholesale & retail | 2019 |
| N P Builders Limited | Construction | 2009 |
| N W Industrial Coatings Limited | Manufacturing | 2003 |
| N&D Hospitality Ltd | Hospitality | 2025 |
| N.C.V. Properties Limited | Wholesale & retail | 1995 |
| N.L. Ward & SON Limited | Transport & logistics | 2002 |
| NAILS&BEAUTY37 Limited | Other services | 2023 |
| Naish Farms Limited | Agriculture & fishing | 1977 |
| Namik Limited | Construction | 2013 |
| Natalie Johnston Ltd | Education | 2024 |
| National Exhibition of Time | Professional & scientific | 1992 |
| Nationwide Clinical Services Limited | Health & social care | 2008 |
| Nationwide Erection Ltd | Construction | 2022 |
| Nautical Training Ltd | Arts & recreation | 2023 |
| Nautilus Offshore Consulting Limited | Professional & scientific | 2012 |
| Navego Ltd | Health & social care | 2025 |
| Navego Property Ltd | Real estate | 2025 |
| Nawako Ltd. | Information & communication | 2025 |
| NB Clifton Private Equity III LP | | 2023 |
| NB Clifton Private Equity IV LP | | 2024 |
| NCN Lifting Services Limited | Construction | 2016 |
| Nedwin Build Ltd | Construction | 2016 |
| Neil Drury Haulage Ltd | Transport & logistics | 2026 |
| Neill Leisure Limited | Real estate | 2010 |
| Neilson Services Limited | Administrative & support | 2008 |
| Nell Properties (Upton) Ltd | Real estate | 2025 |
| Nelson Cummings Well Services Limited | Mining & quarrying | 2018 |
| Nelsons Properties Ltd | Construction | 2011 |
| Neodymium Magnets Limited | Extraterritorial | 2016 |
| Neon Create (Holdings) Limited | Financial services | 2023 |
| Neon Create Ltd | Education | 2018 |
| Neon Tiger Limited | Other services | 2018 |
| Nerijus Services Limited | Construction | 2026 |
| Net&Wheaty Ltd | Hospitality | 2021 |
| Netcontext Limited | Information & communication | 2014 |
| Netnumerics Ltd | Information & communication | 1992 |
| Netsolutions Technology Ltd | Information & communication | 1987 |
| New ARC Properties Limited | Real estate | 2025 |
| New Bird Gate Limited | Hospitality | 2018 |
| New House Terrace Management Company Limited | Real estate | 2021 |
| New Island (Newark) Limited | Hospitality | 2007 |
| New Moon Insurance Services Ltd | Financial services | 2008 |
| New Range Distribution Ltd | Manufacturing | 2026 |
| New Walk Developments Limited | Real estate | 2018 |
| Newark & Sherwood Locksmiths Limited | Administrative & support | 2003 |
| Newark & Sherwood United FC Limited | Arts & recreation | 2021 |
| Newark (Nottinghamshire & Lincolnshire) Air Museum Limited | Arts & recreation | 1968 |
| Newark Air Museum Trading Co. Limited | Arts & recreation | 1995 |
| Newark Alterations Limited | Other services | 2016 |
| Newark Amateur Operatic Society | Arts & recreation | 2001 |
| Newark Antiques and Interiors Ltd | Wholesale & retail | 2017 |
| Newark Antiques Centre Limited | Real estate | 2010 |
| Newark Bearings & Transmissions Limited | Wholesale & retail | 2018 |
| Newark Bookshop Ltd | Wholesale & retail | 2025 |
| Newark Car Cleaning Ltd | Other services | 2025 |
| Newark Car Wash Ltd | Other services | 2026 |
| Newark Catering Equipment Ltd | Professional & scientific | 2008 |
| Newark Cleaners Ltd | Administrative & support | 2012 |
| Newark Conservative Property Company Limited | Construction | 1907 |
| Newark Copper Cylinder Company Limited | Manufacturing | 1977 |
| Newark CUE Club Ltd | Hospitality | 2022 |
| Newark Cycles Ltd | Wholesale & retail | 2016 |
| Newark Cylinders Ltd | Extraterritorial | 2023 |
| Newark Eco Refill Ltd | Wholesale & retail | 2022 |
| Newark Electric Motors Limited | Manufacturing | 1999 |
| Newark Equestrian Livery Limited | Agriculture & fishing | 2021 |
| Newark Fine Furniture Ltd | Manufacturing | 2011 |
| Newark Fountain Bar Ltd | Hospitality | 2024 |
| Newark Fountain Hotel Ltd | Hospitality | 2024 |
| Newark Gent Ltd | Other services | 2024 |
| Newark Glass & Glazing Ltd | Construction | 2019 |
| Newark Glass Company Limited | Construction | 1985 |
| Newark Golf Centre Ltd | Extraterritorial | 2009 |
| Newark Heating Services Ltd | Construction | 2021 |
| Newark Interiors Holdings Limited | Financial services | 2012 |
| Newark K9 Fertility and Scanning Ltd | Agriculture & fishing | 2023 |
| Newark Lorry Wash Limited | Wholesale & retail | 2006 |
| Newark One Limited | Households | 2000 |
| Newark PC Ltd | Wholesale & retail | 2026 |
| Newark PJ Ltd | Manufacturing | 2019 |
| Newark Plumber Ltd | Other services | 2012 |
| Newark Pooch Therapy Ltd | Health & social care | 2026 |
| Newark Properties Limited | Real estate | 2015 |
| Newark Property Company Limited | Real estate | 1956 |
| Newark Repair & Sales Centre Limited | Manufacturing | 2008 |
| Newark Self Drive Hire and Auto Centre Ltd | Administrative & support | 2015 |
| Newark Self Storage Limited | Extraterritorial | 2008 |
| Newark Services' Club CIC | Hospitality | 2023 |
| Newark Sign Services Ltd | Manufacturing | 2019 |
| Newark Solutions Ltd | Information & communication | 2020 |
| Newark Sparkling Hand Car Wash Ltd | Other services | 2025 |
| Newark Specsavers Limited | Wholesale & retail | 1994 |
| Newark Tandoori Takeaway Limited | Hospitality | 2024 |
| Newark Timber Supplies Ltd. | Wholesale & retail | 2025 |
| Newark Town & District Club Limited | Arts & recreation | 1998 |
| Newark Transport Limited | Extraterritorial | 2007 |
| Newark Valeting Car Wash Ltd | Other services | 2026 |
| Newark Visionplus Limited | Wholesale & retail | 1994 |
| Newark's NO1 Hand Car Wash Ltd | Other services | 2017 |