| Nextgen Panel Limited | Professional & scientific | 2023 |
| Nextgenaccess Ltd | Information & communication | 2013 |
| Nexthop Networks Ltd | Administrative & support | 2025 |
| Nexus Corp Limited | Information & communication | 2021 |
| Nexus Introductions Ltd | Administrative & support | 2025 |
| Nexus People Limited | Professional & scientific | 2016 |
| Nexusgrowth Services Limited | Administrative & support | 2025 |
| Nexval Holdings Ltd | Financial services | 2026 |
| NF Capital Consultants Ltd | Professional & scientific | 2017 |
| NFA Advanced Practice Limited | Health & social care | 2020 |
| Nflood Business Consultancy Limited | Professional & scientific | 2021 |
| Nfps 78 Limited | Professional & scientific | 2015 |
| NG M&M Limited | Administrative & support | 2025 |
| NGB Estates Ltd | Real estate | 2026 |
| Ngcommsoft Limited | Information & communication | 2011 |
| NGI Limited | Professional & scientific | 2026 |
| NGS Technologies Ltd | Information & communication | 2023 |
| NGS Technology Group Ltd | Information & communication | 2018 |
| Nguethe Group Limited | Wholesale & retail | 2022 |
| Nguethe Group Properties Limited | Real estate | 2023 |
| NH Easement Ltd | Financial services | 2018 |
| NH Plumbing and Heating Services Ltd | Construction | 2022 |
| NH Trade Ltd | Wholesale & retail | 2020 |
| Niall Burr Design Limited | Arts & recreation | 2023 |
| Niall Sayers Energy Consulting Ltd | Administrative & support | 2026 |
| Nibble Networks Ltd | Administrative & support | 2014 |
| NIC Electrics Ltd | Professional & scientific | 2021 |
| Nicdan Transport Ltd | Transport & logistics | 2018 |
| Nice N Naughty Chester Limited | Wholesale & retail | 2017 |
| Niche Online Limited | Wholesale & retail | 2021 |
| Niche Products 2U Limited | Wholesale & retail | 2012 |
| Nicholas Patrick Group Ltd | Construction | 2022 |
| Nicholas Webster Ltd | Information & communication | 2023 |
| Nicholl Angling Ltd | Arts & recreation | 2017 |
| Nicholls Engineering Ltd | Public administration | 2023 |
| Nick Engineering & Technical Services Limited | Administrative & support | 2026 |
| Nick Hall Visuals Ltd | Professional & scientific | 2022 |
| Nick Kelly Creative Design Limited | Professional & scientific | 2015 |
| Nick Simmons Engineering Services Limited | Professional & scientific | 2019 |
| Nickb Consulting Ltd | Professional & scientific | 2020 |
| Nickfilm Entertainment Ltd | Information & communication | 2011 |
| Nickle (UK) Ltd | Wholesale & retail | 2002 |
| Nicklin Homes Ltd | Real estate | 2018 |
| Nickolas Gardner Limited | Public administration | 2014 |
| Nico Enterprises Limited | Real estate | 2016 |
| Nicodemus (Liverpool) Ltd | Hospitality | 2024 |
| Nicola Hewlett Consultancy Limited | Administrative & support | 2016 |
| Nicola Prescott Ltd | Administrative & support | 2022 |
| Nicolas Cargo Ltd | Transport & logistics | 2020 |
| Nicole Jack Mckenzie Limited | Professional & scientific | 2023 |
| Nido Consulting Limited | Wholesale & retail | 2013 |
| Nido DE Amor Properties Ltd | Real estate | 2019 |
| Nieo Consulting Ltd | Information & communication | 2025 |
| Nieo Homes Ltd | Real estate | 2025 |
| Nigel Coates Construction Limited | Administrative & support | 2015 |
| Nigel Maxwell Limited | Real estate | 1962 |
| Nigel Morrey Limited | Professional & scientific | 2021 |
| Nigel Taylor Consulting Limited | Administrative & support | 2012 |
| Nigel's Bistro Ltd | Hospitality | 2024 |
| Nightingale SR Limited | Information & communication | 2017 |
| Nika-Trans Ltd | Transport & logistics | 2023 |
| Nikad Barbering Ltd | Other services | 2020 |
| Niki-P Visuals Ltd | Other services | 2019 |
| Nikki Ayliff Care Consultancy Ltd | Public administration | 2025 |
| Nikki Gaiger Limited | Administrative & support | 2026 |
| Nikki's Empire UK Ltd | Wholesale & retail | 2026 |
| Nikov Construction Ltd | Construction | 2025 |
| Niktoni Limited | Transport & logistics | 2017 |
| NIL Satis Nisi Optimum JRO Limited | Administrative & support | 2007 |
| Nilapho Trading Limited | Wholesale & retail | 2021 |
| Nillum Holdings Ltd | Financial services | 2025 |
| Nimble Systems Limited | Real estate | 2006 |
| Nimrod Advisory Limited | Information & communication | 2025 |
| Ninang Ltd | Real estate | 2012 |
| Nine Blue Fish Limited | Extraterritorial | 2010 |
| Nine Heaven Ltd | Professional & scientific | 2025 |
| Ninemeister Limited | Administrative & support | 2002 |
| Ninetail Consulting Limited | Information & communication | 2018 |
| Ninety Seven Ltd | Wholesale & retail | 2023 |
| Ninety Two Solutions Limited | Administrative & support | 2015 |
| Ninetyone Innovation Ltd | Manufacturing | 2021 |
| Ninja Leisure UK Management Ltd | Arts & recreation | 2019 |
| Ninki Hair Ltd | Other services | 2023 |
| NIP Tuck POD Ltd | Other services | 2023 |
| Nippa Associates Limited | Construction | 2020 |
| Nippa Celebrity & Sports Management Ltd | Professional & scientific | 2019 |
| Nippa Hire Ltd | Extraterritorial | 2019 |
| Nippa Hospitality & Catering Limited | Wholesale & retail | 2020 |
| Nippa Media Ltd | Extraterritorial | 2019 |
| Nippa Media TV Limited | Information & communication | 2010 |
| Nippa Music Agency Limited | Wholesale & retail | 2020 |
| Nirmal Engineering Limited | Administrative & support | 2014 |
| Nisarga Limited | Information & communication | 2009 |
| NIT Thai Kitchen Limited | Hospitality | 2026 |
| Nitin Limited | Information & communication | 2019 |
| Nixa Logistics Ltd | Transport & logistics | 2017 |
| Nixa Properties Ltd | Real estate | 2020 |
| Nixa Training Ltd | Education | 2021 |
| Nixon Cathodic Protection Services Ltd | Professional & scientific | 2014 |
| NJ Flooring Solutions Ltd | Construction | 2025 |