| Natural Direction Limited | Administrative & support | 2009 |
| Natural Muscle Company Limited | Health & social care | 2013 |
| Nature's Feet Ltd | Health & social care | 2012 |
| Nawabs Hove Limited | Hospitality | 2024 |
| Nayeb Lounge Ltd | Hospitality | 2025 |
| Nazari Cottage Limited | Hospitality | 2025 |
| NCA Architectural Design Ltd | Professional & scientific | 2020 |
| Ncgc Limited | Health & social care | 2017 |
| ND Foods Ltd | Hospitality | 2026 |
| Ndola Properties Limited | Real estate | 2009 |
| NE Square Limited | Health & social care | 2021 |
| Near Mint Ltd | Professional & scientific | 2024 |
| Nehan Ltd | Wholesale & retail | 2023 |
| Neighbourhuud Ltd | Hospitality | 2024 |
| Nela Tea House Ltd | Wholesale & retail | 2013 |
| Nellis Holdings Ltd | Financial services | 2021 |
| Nelroc Construction & Landscaping Ltd | Construction | 2022 |
| Nelson T GP Limited | Health & social care | 2020 |
| NEO CC Limited | Professional & scientific | 2026 |
| Neon Clip Ltd | Construction | 2022 |
| Neonblack Design Limited | Professional & scientific | 2024 |
| Neptuna Estates Ltd | Construction | 2010 |
| Neptune Shutters Limited | Extraterritorial | 2019 |
| Nest Coatings Ltd | Construction | 2024 |
| Network Xpress Ltd | Professional & scientific | 2019 |
| Neuroapex Limited | Health & social care | 2025 |
| Neuroleaps Limited | Other services | 2025 |
| Neurospeechai Ltd | Information & communication | 2023 |
| Never Content Ltd | Information & communication | 2025 |
| Neville Investments Limited | Real estate | 1997 |
| New Build Decade Limited | Real estate | 2020 |
| New Commodity Ltd | Manufacturing | 2025 |
| New ERA Builds Ltd | Construction | 2022 |
| New Great Bridge Ltd | Real estate | 2012 |
| New Greenway Limited | Administrative & support | 2018 |
| New Haven 2 Limited | Construction | 2023 |
| New Kaine Solar Limited | Energy | 2013 |
| New London Films Limited | Information & communication | 2003 |
| New Lovely Look Ltd | Other services | 2015 |
| New Neuro Limited | Wholesale & retail | 2014 |
| New Real Estate Ltd | Real estate | 2018 |
| New Rock Generation Limited | Education | 2012 |
| New Space Optics Ltd | Professional & scientific | 2020 |
| New Stone House Farm Limited | Energy | 2013 |
| New Venders Ltd | Hospitality | 2025 |
| Newman Engineering Services Limited | Manufacturing | 2018 |
| Newport Lodge Estates Limited | Households | 1962 |
| Newton Solar Farm Limited | Energy | 2014 |
| Nexa Health and Care Consultancy Ltd. | Professional & scientific | 2001 |
| Next Curve Network Ltd. | Professional & scientific | 2002 |
| Next Level Lofts Ltd | Construction | 2022 |
| Next Phase Homes Limited | Construction | 2018 |
| Nextgen Betting Ltd | Arts & recreation | 2019 |
| Nextgen Capital Investments Limited | Real estate | 2024 |
| Nextgen Play Ltd | Information & communication | 2022 |
| Nexus Technology Services Limited | Information & communication | 2026 |
| NG Dental Care Limited | Health & social care | 2019 |
| NGB Property Investments Ltd | Real estate | 2017 |
| Ngpmc Ltd | Professional & scientific | 2025 |
| Nhance Digital Ltd | Administrative & support | 2009 |
| Nice Action Properties Ltd | Real estate | 2019 |
| Nice Edit Ltd | Professional & scientific | 2022 |
| Nice Graphic Design and Art Direction Ltd | Professional & scientific | 2013 |
| Nicerra LLP | | 2012 |
| Niche Property Solutions Ltd | Construction | 2021 |
| Niche Wellness Ltd | Other services | 2026 |
| Nicholas James Auctions Limited | Real estate | 2021 |
| Nicholas James Sales & Lettings Ltd | Real estate | 2017 |
| Nick Barnes Puppets Ltd | Arts & recreation | 2017 |
| Nick Barnes Puppetworks Ltd | Wholesale & retail | 2024 |
| Nick Crabtree Limited | Mining & quarrying | 2015 |
| Nick Rivett Sport Limited | Wholesale & retail | 2010 |
| Nick Scott Unlimited Limited | Information & communication | 2016 |
| Nickpick Ltd | Professional & scientific | 2018 |
| Nicola George Project Management Ltd | Professional & scientific | 2014 |
| Nifty Marketing Limited | Information & communication | 2011 |
| Nigel French Graphic Design Limited | Professional & scientific | 2006 |
| Nigel Morris Coaching Ltd | Other services | 2021 |
| Night Hot Cafe Ltd | Administrative & support | 2014 |
| Nikki Penny Stroke and Neurological Physiotherapy Practice Limited | Health & social care | 2005 |
| Nikolaos Gkampranis Ltd | Health & social care | 2009 |
| Nila Rubia Limited | Manufacturing | 2008 |
| Nilatech Robotics and Automation UK Limited | Wholesale & retail | 2024 |
| Nile Terracotta Ltd | Wholesale & retail | 2025 |
| Nimbleway (Eastern Europe) Limited | Manufacturing | 2025 |
| Nimbus Accounting Limited | Professional & scientific | 2011 |
| Nina by Jabran Ltd | Wholesale & retail | 2019 |
| Ninetm Ltd | Wholesale & retail | 2025 |
| Ninety Three Lansdowne Place Limited | Households | 1997 |
| Ninth Prime Limited | Arts & recreation | 2011 |
| Nisbet House Ltd | Real estate | 2017 |
| Nitbuild Limited | Professional & scientific | 2020 |
| Niteeye Consultancy Services Ltd | Administrative & support | 2015 |
| Niusha Aesthetics Ltd | Wholesale & retail | 2020 |
| NJ Dental Limited | Health & social care | 2026 |
| NJ PMO Ltd | Administrative & support | 2017 |
| Njdent Limited | Health & social care | 2023 |
| NJW Dent Limited | Health & social care | 2018 |
| NK Developments Limited | Construction | 2014 |
| NK3 Consultants Ltd | Administrative & support | 2018 |