| NJA Coding Ltd | Professional & scientific | 2016 |
| NJA Services Limited | Transport & logistics | 2018 |
| Njmedical Ltd | Health & social care | 2017 |
| NJT Jetset Ltd | Administrative & support | 2018 |
| NK Bookkeeping Solutions Ltd | Professional & scientific | 2024 |
| NK Footcare Ltd | Health & social care | 2025 |
| NK Online Store Ltd | Wholesale & retail | 2025 |
| NK Pharma Ltd | Health & social care | 2021 |
| NK Property Estates Ltd | Real estate | 2022 |
| NK Rides Ltd | Transport & logistics | 2025 |
| Nkbrown Ltd | Wholesale & retail | 2021 |
| NLM Consulting Limited | Professional & scientific | 2007 |
| NM Goldstone & Co Ltd | Professional & scientific | 2020 |
| Nmart Ltd | Wholesale & retail | 2022 |
| NMC Building Safety Consultants Ltd | Professional & scientific | 2025 |
| NMM Healthcare Limited | Health & social care | 2022 |
| NN Engineering Services Ltd | Professional & scientific | 2022 |
| Nnenna Textiles Limited | Wholesale & retail | 1998 |
| NNM Limited | Professional & scientific | 2023 |
| NNN Hanson Properties Ltd | Real estate | 2025 |
| NO 1 Food Yard Limited | Manufacturing | 2026 |
| NO Dots Limited | Arts & recreation | 2020 |
| NO Ruff Days Ltd | Wholesale & retail | 2023 |
| NO Wham Software Ltd | Information & communication | 2024 |
| NO1 Himalayan Salt Ltd | Wholesale & retail | 2020 |
| NO1DEALS Limited | Wholesale & retail | 2025 |
| Nobadhairgeng Ltd | Other services | 2025 |
| Nobani Ltd | Health & social care | 2025 |
| Nobel International Ltd | Wholesale & retail | 2019 |
| Noble Empire Limited | Wholesale & retail | 2024 |
| Noble Medical Service Limited | Health & social care | 2024 |
| Node Wise Consultancy Ltd | Construction | 2025 |
| Noel Heppenstall Limited | Professional & scientific | 1987 |
| Noel J Hughes Management Consultancy Ltd. | Professional & scientific | 2022 |
| Noesis Consulting Services Limited | Professional & scientific | 2024 |
| Noir Hair Salon Ltd | Real estate | 2018 |
| Noira Group Ltd | Education | 2020 |
| Noise Survey Limited | Professional & scientific | 2001 |
| Nolan Enterprises Ltd | Real estate | 2025 |
| Nolan Software Solutions Limited | Information & communication | 2023 |
| Nomad Canine Wellbeing Ltd | Other services | 2025 |
| Nomad Mods Ltd | Construction | 2024 |
| Nomshop Ltd | Wholesale & retail | 2024 |
| Nonni Limited | Hospitality | 2018 |
| Noofé Ltd | Hospitality | 2023 |
| Noor & Barakah Ltd | Wholesale & retail | 2025 |
| Noor Bites Ltd | Hospitality | 2025 |
| Noor Rentals Ltd | Real estate | 2026 |
| Norcroft Estates Limited | Real estate | 2024 |
| Norfolk Sunny Ltd | Hospitality | 2024 |
| Norlin Polymers (UK) Limited | Manufacturing | 2014 |
| Norsec Group Ltd | Administrative & support | 2021 |
| North Fylde Properties Limited | Real estate | 2007 |
| North Grange Boutique Cottages Limited | Hospitality | 2016 |
| North Hire Ltd | Administrative & support | 2010 |
| North Light Film Studios Ltd | Extraterritorial | 2012 |
| North Light Physiotherapy Associates Ltd | Other services | 2018 |
| North Partners Limited | Professional & scientific | 2007 |
| North Sea Ledger Management Ltd | Professional & scientific | 2015 |
| North Solar Limited | Administrative & support | 2026 |
| North South Solutions Limited | Administrative & support | 2010 |
| North Square Barristers Chambers Limited | Professional & scientific | 2016 |
| North Star Tyres Ltd | Wholesale & retail | 2023 |
| North Valley Limited | Transport & logistics | 2025 |
| North Walls Property Limited | Households | 2025 |
| North West Heritage Nurseries Limited | Financial services | 2025 |
| North Yorkshire Construction Ltd | Construction | 2014 |
| Northbridge Care Group Ltd | Health & social care | 2026 |
| Northedge Outdoor Ltd | Wholesale & retail | 2026 |
| Northern Assessors Limited | Other services | 2009 |
| Northern Bear Property Limited | Real estate | 2021 |
| Northern Business Communications Limited | Information & communication | 2012 |
| Northern Climate Solutions Ltd | Construction | 2026 |
| Northern College of Business and Science Limited | Education | 2023 |
| Northern Cooling Ltd | Construction | 2015 |
| Northern Eagles Partnership Limited | Financial services | 2012 |
| Northern Electrical SAP Services Ltd | Energy | 2024 |
| Northern Event Structures Limited | Other services | 2009 |
| Northern Fitness Ltd | Arts & recreation | 2023 |
| Northern Goddess Ltd | Education | 2025 |
| Northern Grace Holdings Limited | Real estate | 2022 |
| Northern INK Ltd | Administrative & support | 2015 |
| Northern Lion Limited | Construction | 2018 |
| Northern Mate Limited | Extraterritorial | 2020 |
| Northern Powerhouse Consulting Ltd | Professional & scientific | 2015 |
| Northern Property Ventures Ltd | Real estate | 2023 |
| Northern Psychological Services Limited | Health & social care | 2022 |
| Northern RAW Feeds Ltd | Manufacturing | 2018 |
| Northern Render Systems Limited | Construction | 2013 |
| Northern Road Therapies Limited | Health & social care | 2026 |
| Northern Sweet PVT Ltd | Other services | 2022 |
| Northern Tea House Limited | Hospitality | 2015 |
| Northern Tea Ltd | Hospitality | 2026 |
| Northern Transport Services Limited | Transport & logistics | 1985 |
| Northern Wings Limited | Information & communication | 2018 |
| Northernufh Ltd | Construction | 2022 |
| Northfield Mills Management Company Limited | Households | 2011 |
| Northfields Limited | Education | 2023 |
| Northgate Bites Ltd | Hospitality | 2026 |
| Northhold Property Services Ltd | Households | 2026 |