| Nestor Consultancy Limited | Information & communication | 2018 |
| Netherfield Cars Ltd | Wholesale & retail | 2022 |
| Netherfield Farm and Forestry Ltd. | Manufacturing | 2015 |
| Netherfield Tree Surgery Limited | Agriculture & fishing | 2021 |
| Network Surety Limited | Information & communication | 2005 |
| Networkguru Limited | Information & communication | 2013 |
| Netxl Distribution Holdings Ltd | Financial services | 2021 |
| Netxl Distribution Ltd | Wholesale & retail | 2021 |
| Netxl Holdings Ltd | Financial services | 2021 |
| Netxl Limited | Information & communication | 2013 |
| NEU Financial Consulting Ltd | Professional & scientific | 2016 |
| Neural Capital Limited | Financial services | 2013 |
| Neurequity Limited | Information & communication | 2021 |
| Neurointegra Ltd | Education | 2020 |
| Neuronurtureco Limited | Education | 2025 |
| Neuronworks Ltd | Information & communication | 2026 |
| Nevard Media Limited | Information & communication | 2000 |
| Never Ending WAR Limited | Wholesale & retail | 2026 |
| Never Ever Media Ltd | Professional & scientific | 2019 |
| Neves Domestic & Commercial Cleaning Ltd | Administrative & support | 2026 |
| Neville’S Goods Limited | Wholesale & retail | 2022 |
| New Dorking Sushi Ltd | Hospitality | 2024 |
| New Start Cleaning Ltd | Administrative & support | 2022 |
| New Timber Spaces Limited | Manufacturing | 2020 |
| New Vision Properties Ltd | Construction | 2019 |
| New West Byfleet Sushi Ltd | Hospitality | 2021 |
| New York Nail Surrey Ltd | Other services | 2025 |
| Newbond Credit Limited | Financial services | 2004 |
| Newbond Leasing Limited | Real estate | 1994 |
| Newfields Atlanta, LLC | | 2008 |
| Newfields Atlanta, LLC | | 2008 |
| Newhere UK Limited | Wholesale & retail | 2019 |
| Newland Control (UK) Limited | Professional & scientific | 2017 |
| Newlands Ventures Ltd | Administrative & support | 2018 |
| Newsguru.Ai Ltd | Information & communication | 2023 |
| Newzone Sport Ltd | Wholesale & retail | 2024 |
| Nexcrown Associates Limited | Wholesale & retail | 2002 |
| Nexero Ltd | Information & communication | 2025 |
| Nexly 360 Private Limited | Information & communication | 2025 |
| Nexory Solutions Limited | Professional & scientific | 2026 |
| Next Sound Ltd | Information & communication | 2025 |
| Nexus Global Logistics Ltd | Transport & logistics | 2019 |
| Nexus World LLP | | 2008 |
| Nexuss Ltd | Information & communication | 2014 |
| Nexusto Ltd | Information & communication | 2020 |
| NFA Speed Ltd | Wholesale & retail | 2025 |
| NFP Health Community Interest Company | Wholesale & retail | 2019 |
| NGR Limited | Manufacturing | 2000 |
| NHN Limited | Other services | 1995 |
| NHQ Developments Ltd | Construction | 2026 |
| NHQ Group Holdings Ltd | Professional & scientific | 2025 |
| NHQ Group Ltd | Construction | 2025 |
| NHQ Holdings Ltd | Professional & scientific | 2016 |
| NHQ Ltd | Construction | 2016 |
| NHW Consultancy Ltd | Professional & scientific | 2012 |
| Nicholas Homes Southern Limited | Construction | 2020 |
| Nichols Consulting Group Limited | Professional & scientific | 2020 |
| Nicholson-Porter Group Ltd | Professional & scientific | 2025 |
| Nick Tree Film Limited | Information & communication | 2015 |
| Nicky Bunn Limited | Professional & scientific | 2021 |
| Nico DRY Stone Ltd | Administrative & support | 2023 |
| Nico Polo Ltd | Agriculture & fishing | 2018 |
| Nicomelia Therapy Ltd | Health & social care | 2026 |
| Nidus Games Ltd | Information & communication | 2026 |
| Nigel Harvey Ltd | Professional & scientific | 2015 |
| Nigel Wilkinson S.F.X Ltd | Information & communication | 2012 |
| Night ROW Pictures Ltd | Information & communication | 2021 |
| Nightblazr Limited | Professional & scientific | 2023 |
| Nightingale View Ltd | Professional & scientific | 2007 |
| Nightingales Advisory Ltd | Professional & scientific | 2026 |
| Nightowl Resolutions Ltd | Information & communication | 2020 |
| Nihon Kohden UK Limited | Wholesale & retail | 2010 |
| Niki Barbers Ltd | Other services | 2024 |
| Nikki’S Perfect Pooches Ltd | Other services | 2024 |
| Nikmei Limited | Other services | 2016 |
| Nilpori Limited | Wholesale & retail | 2017 |
| Nimbus Technology Ltd | Manufacturing | 2024 |
| Nina Litchfield Studios Ltd | Other services | 2014 |
| Nine Fifty One Ltd | Wholesale & retail | 2016 |
| Nine W Motorsport Ltd | Information & communication | 2013 |
| Ninja AV Limited | Construction | 2023 |
| Ninth Balcony Limited | Information & communication | 2014 |
| NJB Ltd | Professional & scientific | 2007 |
| NJE Golf Limited | Arts & recreation | 2011 |
| Njme Property Limited | Real estate | 2024 |
| Nkirote Ltd | Administrative & support | 2024 |
| NN Caterham Sushi Ltd | Wholesale & retail | 2024 |
| NO More Noggins Ltd | Wholesale & retail | 2024 |
| Noah & Oscar Property Ltd | Real estate | 2026 |
| Noah Football Group Ltd | Financial services | 2020 |
| Nobel Thinking Ltd | Administrative & support | 2018 |
| Noberne Doors Limited | Manufacturing | 1975 |
| Noble Empowerment Ltd | Manufacturing | 2019 |
| Noblebrand Limited | Real estate | 2003 |
| Noboshree Ltd | Wholesale & retail | 2025 |
| Node Lighting Solutions Ltd | Wholesale & retail | 2019 |
| Nodens Medical Ltd | Manufacturing | 2017 |
| Noego Thinking Ltd | Professional & scientific | 2023 |
| Nomad GH Limited | Administrative & support | 2023 |
| Nomad Studios Limited | Information & communication | 2017 |