| Netscaff Services Ltd | Construction | 2016 |
| Neuro Developments Ltd | Financial services | 2019 |
| Neuro Diagnostics (North) Ltd | Health & social care | 2016 |
| Nevaeh Couriers Ltd | Transport & logistics | 2020 |
| Nevison Properties Limited | Real estate | 1964 |
| New Beginnings Christian Centre | Other services | 2011 |
| New Cosmopolitan Limited | Hospitality | 2011 |
| New ERA Group Limited | Professional & scientific | 2016 |
| New Generation Ventures Ltd | Financial services | 2024 |
| New Image Fitness Limited | Other services | 2008 |
| New Journeys (Halifax) Limited | Administrative & support | 2020 |
| New Leaf Accounting Limited | Professional & scientific | 2025 |
| New Lengths Limited | Other services | 2018 |
| New Life Investments Limited | Real estate | 1998 |
| New Moss Equestrian Centre Limited | Extraterritorial | 2022 |
| New North Road Management Company Limited | Real estate | 2006 |
| New Park Properties Queensbury Ltd | Real estate | 2026 |
| New SEO Limited | Other services | 2012 |
| New Ventures (Halifax) Limited | Real estate | 1989 |
| New York Farm Limited | Wholesale & retail | 2022 |
| Newark Green Ltd | Wholesale & retail | 2025 |
| Newark Henshaw Ltd | Wholesale & retail | 2025 |
| Newby Psychological Services Ltd | Health & social care | 2010 |
| Newfold Properties Limited | Real estate | 2019 |
| Newgen IT Solutions Limited | Information & communication | 2013 |
| Newling Property Developments Ltd | Real estate | 2025 |
| Newmac Displays Limited | Construction | 2003 |
| Newnham House Solutions Ltd | Health & social care | 2024 |
| News Agents HFD Ltd | Wholesale & retail | 2026 |
| Newsome Properties Ltd | Real estate | 2024 |
| Newstead Machine Tool Services Ltd | Administrative & support | 2014 |
| Newtrino Limited | Wholesale & retail | 2011 |
| Nexan Wedge Technologies Ltd | Wholesale & retail | 2025 |
| Nexgen Commercial Parts Ltd | Wholesale & retail | 2021 |
| Nexgen Products Limited | Wholesale & retail | 2013 |
| Nexgeneration Support Ltd | Administrative & support | 2026 |
| Nexo Property Ltd | Real estate | 2022 |
| Next GEN Consultants Limited | Information & communication | 2025 |
| Next Level Bar Limited | Hospitality | 2019 |
| Next Screen Limited | Information & communication | 2021 |
| Next Step Mentoring CIC | Education | 2025 |
| Nextgen Nexus Ltd | Wholesale & retail | 2025 |
| Nextvora Limited | Wholesale & retail | 2026 |
| Nexus Deals UK Ltd | Wholesale & retail | 2025 |
| Nexus Fluid Power Ltd | Wholesale & retail | 2025 |
| Nexus Group Housing Ltd | Health & social care | 2024 |
| Nexusinformatics Limited | Information & communication | 2012 |
| NG Joinery Ltd | Construction | 2008 |
| Ngandu Estate Management Ltd | Real estate | 2023 |
| Ngrs Resin Surfaces Limited | Construction | 2018 |
| NH Deliveries Ltd | Transport & logistics | 2024 |
| NH Fabrications Limited | Construction | 2019 |
| NH Medical Ltd | Health & social care | 2019 |
| Nhgs International Limited | Education | 2024 |
| NHP Companies Limited | Health & social care | 2022 |
| Nice Cakes & Sweets Limited | Hospitality | 2025 |
| Nicholas Timothy Limited | Other services | 2003 |
| Nicholsons Property Management Ltd | Real estate | 2022 |
| Nicnat Limited | Public administration | 2022 |
| Nico-Wolf Joinery Ltd | Manufacturing | 2024 |
| Nicola Dixon HR Services Ltd | Administrative & support | 2015 |
| Nigel Binns Electrical Engineering Services Limited | Professional & scientific | 2018 |
| Nihpk Limited | Administrative & support | 2022 |
| Nikki Saxton Ltd | Professional & scientific | 2017 |
| Niko (INT) Limited | Manufacturing | 2004 |
| Niko Transport Service Ltd | Transport & logistics | 2020 |
| Nimbus Contracts Ltd | Administrative & support | 2021 |
| Nine DOT Solutions Limited | Education | 2023 |
| NINE50 Care Group Ltd | Health & social care | 2024 |
| NINETEEN98 CNC Services Ltd | Professional & scientific | 2026 |
| NINETEEN98 Ltd | Professional & scientific | 2023 |
| Nirvana Healthcare Private Limited | Health & social care | 2010 |
| Nisha N Patel Limited | Public administration | 2023 |
| NJC Bookkeeping Limited | Professional & scientific | 2016 |
| NJR Business Management Ltd | Professional & scientific | 2024 |
| NJS Heat Sales Ltd | Wholesale & retail | 2018 |
| NK Consultancy Services Limited | Professional & scientific | 2022 |
| NKI Property Management Limited | Real estate | 2026 |
| NLC Agile Limited | Administrative & support | 2018 |
| NLP Limited | Other services | 2001 |
| NM Art & Architectural Design Limited | Professional & scientific | 2025 |
| NO Hassle Heating Limited | Construction | 2018 |
| NO Hassle Solutions Limited | Construction | 2021 |
| Noah's ARK Centre | Other services | 2000 |
| Noble Stag Media Limited | Information & communication | 2015 |
| Noblelistic Ventures Ltd | Wholesale & retail | 2025 |
| Nocki Ltd | Hospitality | 2025 |
| Noise in Ltd | Arts & recreation | 2025 |
| Nomad Management Ltd | Professional & scientific | 2015 |
| Noor Medical Care Limited | Health & social care | 2025 |
| Noori Halal Butchers Ltd | Wholesale & retail | 2026 |
| Noors Slice & Delights Ltd | Hospitality | 2026 |
| Norbro Limited | Water & waste | 2016 |
| Norbu Enterprises Ltd | Financial services | 2021 |
| Norby Commercial Limited | Real estate | 2026 |
| Norcliffe Estates Ltd | Real estate | 2023 |
| Nordsea Limited | Extraterritorial | 2023 |
| Norland Spring Limited | Hospitality | 2026 |
| Norman Littlewood & Sons (Properties) Limited | Construction | 1993 |
| Norman Reeves Ltd | Wholesale & retail | 2025 |