| Northern Fabs (Bradford) Ltd | Manufacturing | 2007 |
| Northern Fastener and Engineering Limited | Administrative & support | 2007 |
| Northern Forge Consulting Limited | Professional & scientific | 2019 |
| Northern Frames (Doncaster) Ltd | Construction | 2008 |
| Northern Garden Machinery Ltd | Manufacturing | 2018 |
| Northern General Media Group Ltd | Information & communication | 2017 |
| Northern Grinding and Granulating Equipment Engineering Company Limited | Professional & scientific | 2004 |
| Northern Groundcare EOT Limited | Financial services | 2025 |
| Northern Group (U.K.) Limited | Extraterritorial | 2017 |
| Northern Hills Housing Limited | Hospitality | 2025 |
| Northern Lifetime Limited | Health & social care | 2011 |
| Northern Lights Learning and Solutions Ltd | Professional & scientific | 2008 |
| Northern Logistics Group Ltd | Water & waste | 2019 |
| Northern Narrowboats Ltd | Wholesale & retail | 2024 |
| Northern Pearls Ltd | Health & social care | 2024 |
| Northern Perk Ltd | Hospitality | 2018 |
| Northern Powerboats Ltd | Extraterritorial | 2023 |
| Northern Powerhouse Investments Limited | Financial services | 2015 |
| Northern Prestige Ltd | Agriculture & fishing | 2021 |
| Northern Recruit Limited | Administrative & support | 2024 |
| Northern Refrigeration & Catering Equipment Ltd. | Manufacturing | 1995 |
| Northern Resoles Limited | Other services | 2024 |
| Northern Reunion Ltd | Information & communication | 2023 |
| Northern Ridge Properties Ltd | Real estate | 2026 |
| Northern Rose Design Limited | Construction | 2020 |
| Northern Soles Yorkshire Ltd | Other services | 2023 |
| Northern Soul Food Ltd | Hospitality | 2017 |
| Northern Steel Guards Security Services Ltd | Administrative & support | 2026 |
| Northern Stone and Paving (Sheffield) Limited | Manufacturing | 2004 |
| Northern Supply Chain Ltd | Wholesale & retail | 2026 |
| Northern Touring Company Ltd | Arts & recreation | 2022 |
| Northern Transport Engineering Limited | Manufacturing | 2015 |
| Northern Video Solutions Ltd | Information & communication | 2023 |
| Northern Willow Trading Ltd | Wholesale & retail | 2020 |
| Northern Workroom Ltd | Construction | 2021 |
| Northernscape Limited | Wholesale & retail | 2022 |
| Northfab Estates Limited | Real estate | 2005 |
| Northfield Fusion Ltd | Construction | 2020 |
| Northfield Property Holdings Limited | Real estate | 2025 |
| Northfield Retail Ltd | Wholesale & retail | 2025 |
| Northfield Surfacing Limited | Construction | 2025 |
| Northfield Traffic Management Limited | Transport & logistics | 2025 |
| Northfield Utilities Limited | Construction | 2022 |
| Northfieldfs Limited | Financial services | 2014 |
| Northform Limited | Information & communication | 2015 |
| Northgate Fast Food Limited | Hospitality | 1993 |
| Northkind Press Ltd | Information & communication | 2026 |
| Northlight Practice Ltd | Professional & scientific | 2024 |
| Northlight Press Ltd | Information & communication | 2025 |
| Northpath Limited | Professional & scientific | 2025 |
| Northpeak Property Maintenance Ltd | Construction | 2021 |
| Northside Abodes Ltd | Real estate | 2025 |
| Northside Alloys & Metals Ltd | Professional & scientific | 2026 |
| Northside Carpets Ltd | Wholesale & retail | 2011 |
| Northside Media Limited | Manufacturing | 2016 |
| Northsky Design Limited | Professional & scientific | 2023 |
| Northstar UK Logistics Ltd | Transport & logistics | 2026 |
| Northtown Kitchen Ltd | Hospitality | 2020 |
| Northumberland Road Student Properties Limited | Real estate | 2022 |
| Northwater Estates Ltd | Real estate | 2018 |
| Northwood Sheffield Limited | Real estate | 2006 |
| Norton & Burton Limited | Arts & recreation | 2018 |
| Norton Aluminium Limited | Wholesale & retail | 2022 |
| Norton Cast Products Limited | Manufacturing | 1978 |
| Norton Composites Limited | Financial services | 2020 |
| Norton Court Freehold Limited | Extraterritorial | 2007 |
| Norton Engineering Limited | Professional & scientific | 2009 |
| Norton Evans Limited | Construction | 1983 |
| Norton Hall Management Co. Ltd | Administrative & support | 2000 |
| Norton Hall Stables Management Company Limited | Households | 1995 |
| Norton Highfield Ltd | Professional & scientific | 2015 |
| Norton Mayfield Architects Limited | Professional & scientific | 2014 |
| Norton Oakes Cricket Club Limited | Arts & recreation | 1999 |
| Norton Park Limited | Administrative & support | 2008 |
| Norton Salco Limited | Wholesale & retail | 1983 |
| Norton's Stoves & Fireplaces Limited | Wholesale & retail | 2023 |
| Nortrapor Ltd | Wholesale & retail | 2022 |
| Norwood Antiques UK Ltd | Agriculture & fishing | 2012 |
| Norwood Building Company Ltd | Construction | 2013 |
| Norwood Interior Solutions Limited | Construction | 2021 |
| Norwood Management Limited | Households | 1985 |
| Norwood Metals Limited | Water & waste | 1997 |
| Noscible Software Ltd | Information & communication | 2017 |
| Noscorp Property Ltd | Real estate | 2026 |
| NOT a Trading Company Ltd | Extraterritorial | 2002 |
| NOT Just Pink Custard CIC | Hospitality | 2024 |
| NOT Open Dont Come Ltd | Hospitality | 2024 |
| Nota Bene Consulting Ltd | Professional & scientific | 2020 |
| Nota Digital Ltd | Information & communication | 2009 |
| Notarial Services (Yorkshire and Derbyshire) Limited | Professional & scientific | 2021 |
| Notch CNC Ltd | Manufacturing | 2022 |
| Notte Rosa Group Ltd | Information & communication | 2026 |
| Nottingham Blinds and Building Maintenance Limited | Manufacturing | 2025 |
| Nottm Surveys Ltd | Real estate | 2018 |
| Notts Timber (Pallets) Limited | Manufacturing | 2021 |
| Notts Timber Ltd | Manufacturing | 2024 |
| Notwork 23 Ltd | Arts & recreation | 2016 |
| Noughtcross Haus CIC | Education | 2024 |
| NOUGHTPOINT9 Properties Ltd | Real estate | 2023 |
| Noughts and Stitches Ltd | Wholesale & retail | 2026 |