| Nairobi Motors (UK) Ltd | Wholesale & retail | 2006 |
| Naiss Ltd | Real estate | 2017 |
| Nakai Aellure Limited | Health & social care | 2021 |
| Nancy Lucas Management Ltd | Arts & recreation | 2016 |
| Nankana Ltd | Wholesale & retail | 2024 |
| Nano Ventures Ltd | Wholesale & retail | 2024 |
| Naomi Chantelle Chair Rental Limited | Other services | 2021 |
| Naomi Chantelle Hair Limited | Other services | 2018 |
| Naomi Chantelle Hair Products Limited | Other services | 2020 |
| Narach Consultancy Ltd | Professional & scientific | 2014 |
| Naskarpie Limited | Wholesale & retail | 2018 |
| Nathalie Jagger Limited | Other services | 2019 |
| Nation Store Ltd | Wholesale & retail | 2023 |
| Navigating Minds Therapy Ltd | Health & social care | 2025 |
| Nawco Limited | Hospitality | 2025 |
| Nazir's Frozen Food Limited | Hospitality | 2022 |
| NBD Site Services Limited | Construction | 2025 |
| NBL Investments Limited | Construction | 2024 |
| NBV Commercial Cleaning Ltd | Administrative & support | 2018 |
| NC Roofing Services Ltd | Construction | 2024 |
| Neal Lewis & Associates Limited | Information & communication | 2009 |
| Nellie's Food & Drink Ltd | Manufacturing | 2025 |
| NEO Home Group Ltd | Other services | 2019 |
| Neurodiversity & Entrepreneurship Association CIC | Professional & scientific | 2023 |
| New ERA Home Improvements Limited | Construction | 2026 |
| New ERA Technologies Ltd | Information & communication | 2025 |
| New Way Medical Limited | Health & social care | 2012 |
| New-Gen Property Group Limited | Construction | 2024 |
| Newfalcon Limited | Households | 1994 |
| Newman Advisory Ltd | Professional & scientific | 2016 |
| Newstead Consultancy Ltd | Professional & scientific | 2025 |
| Newstead Property Development Ltd | Real estate | 2018 |
| Nexatone Limited | Agriculture & fishing | 2023 |
| Nextln Limited | Wholesale & retail | 2025 |
| NFD Properties Ltd | Real estate | 2021 |
| NH Healthcare Ltd | Health & social care | 2010 |
| NH Holdings Group Limited | Financial services | 2025 |
| Nibble & Brew Co. Ltd | Hospitality | 2026 |
| Nicolas Gateaux (Yorkshire) Limited | Professional & scientific | 2024 |
| Nightowl Bars Limited | Extraterritorial | 2017 |
| NJ Painting Services Limited | Construction | 2025 |
| NK 5 Abbey Terrace Freehold Limited | Households | 2025 |
| NK 5 Abbey Terrace Limited | Households | 2025 |
| NKH Consultancy Ltd | Administrative & support | 2022 |
| NL Sales Growth Ltd | Administrative & support | 2026 |
| NO 24 Bar Saltaire Ltd | Hospitality | 2007 |
| NO14 North Lane Limited | Hospitality | 2021 |
| Nomitech Ltd | Information & communication | 2011 |
| Noor Events Ltd | Hospitality | 2023 |
| Noor Support Service Limited | Health & social care | 2019 |
| Noran Fabrics Limited | Wholesale & retail | 1999 |
| Nordish (Saltaire) Ltd | Hospitality | 2018 |
| Norman RAE Playing Fields Limited(The) | Arts & recreation | 1926 |
| North Bradford Juniors Ltd | Arts & recreation | 2023 |
| North East Windhill Community Association | Health & social care | 2001 |
| North South Holding Group Limited | Real estate | 2026 |
| North West Eco Rentals Ltd | Administrative & support | 2025 |
| Northbridgetradingco Ltd | Wholesale & retail | 2026 |
| Northcliffe Assets Limited | Wholesale & retail | 2021 |
| Northcliffe Garage Shipley Limited | Wholesale & retail | 2018 |
| Northcliffe Golf Club Limited | Arts & recreation | 2015 |
| Northern Sounds Limited | Education | 2006 |
| Northerncrown Ltd | Wholesale & retail | 2026 |
| Northway Vehicle Rentals Limited | Extraterritorial | 2009 |
| Northwestmotorshipley Limited | Wholesale & retail | 2021 |
| Norwood Car Sales Ltd | Wholesale & retail | 2025 |
| Novus Construction & Joinery Ltd | Construction | 2025 |
| NP Packaging Ltd | Wholesale & retail | 2025 |
| NR & HS Properties Limited | Real estate | 2020 |
| NSP Comms Limited | Information & communication | 2020 |
| NU Baildon Limited | Real estate | 2025 |
| NU Healthcare Provisions Ltd | Health & social care | 2025 |
| NU Holdings Ltd | Real estate | 2025 |
| Nuddl Ltd | Wholesale & retail | 2025 |
| Nudental Limited | Real estate | 2020 |
| NWW Home Improvements Ltd | Construction | 2022 |
| NXT GEN Bars Limited | Hospitality | 2021 |
| O&I Design Limited | Professional & scientific | 2016 |
| Oak Lodge Residential Home Limited | Health & social care | 2016 |
| Oak Store Direct Ltd | Wholesale & retail | 2013 |
| Oakfield Business & Training Centre (UK) Limited | Administrative & support | 2015 |
| Oakleigh (Baildon) Limited | Professional & scientific | 2004 |
| Oakley Property Services BFD Ltd | Real estate | 2018 |
| Oakmount Holdings UK Ltd | Construction | 2026 |
| Odxc Ltd | Information & communication | 2022 |
| Ogden Farming Limited | Agriculture & fishing | 2024 |
| Ogden Properties Lancashire Limited | Real estate | 2021 |
| Oglum LMD Ltd | Hospitality | 2026 |
| OJR12 Limited | Professional & scientific | 2018 |
| Oldbury & Cruickshank Eyecare Limited | Health & social care | 2005 |
| Oldfoundland Enterprises Limited | Wholesale & retail | 2015 |
| OLE Media Limited | Information & communication | 2011 |
| Olivant Consultancy Ltd | Administrative & support | 2020 |
| Olive Stone Housing Ltd | Real estate | 2026 |
| Oliver's Retreat Retford Limited | Hospitality | 2023 |
| Omar Convenience Ltd | Wholesale & retail | 2014 |
| Omerch Limited | Wholesale & retail | 2008 |
| OMG Bargains Ltd | Wholesale & retail | 2025 |
| ON the Wall Art Ltd | Wholesale & retail | 2024 |
| ON Trend Living Limited | Construction | 2018 |