| Nextech Hub CIC | Information & communication | 2026 |
| Nextedgeuk Ltd | Information & communication | 2023 |
| Nextera Management Solutions Ltd | Administrative & support | 2025 |
| Nextfold Travels Ltd | Administrative & support | 2025 |
| Nextgen Cyber Z13 Ltd | Information & communication | 2025 |
| Nextgen Gear Ltd | Wholesale & retail | 2025 |
| Nextgen Mobility Solutions Limited | Wholesale & retail | 2026 |
| Nextgen Sellings Ltd | Wholesale & retail | 2024 |
| Nexton Cars Ltd | Wholesale & retail | 2019 |
| Nextora Vision UK Limited | Wholesale & retail | 2025 |
| Nexture Ltd | Information & communication | 2025 |
| Nextwave Media Group Ltd | Administrative & support | 2021 |
| Nexum Business Intelligence Ltd | Information & communication | 2026 |
| Nexus Cars Market Limited | Wholesale & retail | 2025 |
| Nexus Learn Arabic UK Ltd | Education | 2018 |
| Nexus Provision Ltd | Education | 2026 |
| Nexus Pulse Marketing Ltd | Professional & scientific | 2024 |
| Nexus Web Marketing Ltd | Information & communication | 2025 |
| Nexusconstruct Ltd | Construction | 2024 |
| Nexvibe Ltd | Wholesale & retail | 2025 |
| Nexvio Systems Limited | Information & communication | 2026 |
| Nexvora Global Ltd | Wholesale & retail | 2026 |
| Nexvora Traders Ltd | Wholesale & retail | 2026 |
| Nezaj Utilities Ltd | Construction | 2020 |
| NF Marketing Limited | Extraterritorial | 2016 |
| NF Ramzan Properties Ltd | Real estate | 2025 |
| Nfau Commerce Ltd | Wholesale & retail | 2025 |
| Nfcn Limited | Health & social care | 2016 |
| Nfinics Consulting Ltd | Information & communication | 2015 |
| Nfop Management Limited | Administrative & support | 1997 |
| Nfop Transitions Limited | Administrative & support | 2015 |
| NFS International Holdings Ltd | Financial services | 2022 |
| NFS Meetings Technology Limited | Information & communication | 2003 |
| NFS Property Ltd | Real estate | 2024 |
| NG Supply Limited | Transport & logistics | 2024 |
| NG Utilities Ltd | Construction | 2021 |
| NGA Logistics Ltd | Transport & logistics | 2023 |
| NGG Construct Ltd | Construction | 2025 |
| Ngochris Limited | Health & social care | 2022 |
| NGR Audio and Coms Cabling Ltd | Arts & recreation | 2021 |
| NH Constructions Group Ltd | Construction | 2016 |
| NH Maintenance Solutions Ltd | Construction | 2019 |
| NH S&M Ltd | Construction | 2025 |
| NH Traders Ltd | Construction | 2024 |
| NHX Autos Ltd | Wholesale & retail | 2019 |
| NIA YA Ltd | Information & communication | 2026 |
| Niamh Pender Limited | Professional & scientific | 2011 |
| NIB and Co Accountants Ltd | Professional & scientific | 2019 |
| Nibblz Ltd | Wholesale & retail | 2024 |
| Nice Property Ltd | Real estate | 2020 |
| Nicho Limited | Wholesale & retail | 2019 |
| Nichol and MO Ltd | Transport & logistics | 2026 |
| Nick VIK Trans Ltd | Transport & logistics | 2026 |
| Niclaw ANG Trading Ltd | Wholesale & retail | 2021 |
| Nico Trans Ltd | Transport & logistics | 2017 |
| Nico's Contractors Ltd | Construction | 2026 |
| Nicobel and Co Ltd | Administrative & support | 2018 |
| Nicodan Consultancy Limited | Health & social care | 2024 |
| Nicol&Milan Limited | Wholesale & retail | 2018 |
| Nicolas International Limited | Administrative & support | 2003 |
| Nicusor Adrian Pantaleru Transport Ltd | Transport & logistics | 2024 |
| Nielsen Chase Data Research Ltd | Professional & scientific | 2023 |
| Nifeliz Services Limited | Transport & logistics | 2016 |
| Nigeria Bedfordshire Community CIC | Information & communication | 2023 |
| Nightrest Ltd | Real estate | 2024 |
| Nightrest Property Ltd | Hospitality | 2023 |
| Nights by Wilder Ltd | Wholesale & retail | 2021 |
| Nihant Ltd | Construction | 2025 |
| Nijan Parcel Service Ltd | Transport & logistics | 2025 |
| NIK Hand Car Wash Ltd | Administrative & support | 2023 |
| Niki Allen Ltd | Other services | 2024 |
| Nikki-Joe Limited | Other services | 2016 |
| Niko Electrical 1 Ltd | Construction | 2023 |
| Niko Speed Ltd | Transport & logistics | 2020 |
| Nikol 2021 Ltd | Transport & logistics | 2022 |
| Nikolas & C Services Ltd | Construction | 2018 |
| Nikolas Logistics Ltd | Wholesale & retail | 2016 |
| Nimada Solutions Ltd | Health & social care | 2018 |
| Nimah Beauty Ltd | Wholesale & retail | 2019 |
| Nimi Estates Limited | Real estate | 2024 |
| Nimi Products Ltd | Wholesale & retail | 2019 |
| Nimienterprise Limited | Wholesale & retail | 2022 |
| Nimjal Ltd | Wholesale & retail | 2023 |
| Nimra Limited | Transport & logistics | 2016 |
| Nims Construction Ltd | Construction | 2020 |
| Nina Mace Photography Limited | Professional & scientific | 2019 |
| Nina Thai Massage and Beauty Ltd | Other services | 2022 |
| Ninas Kitchen Ltd | Hospitality | 2021 |
| Nine Red Presents ... Community Interest Company | Education | 2006 |
| Ningo Ltd | Health & social care | 2025 |
| Ninja Solutions Limited | Wholesale & retail | 2025 |
| Ninos Global Tech Ltd | Information & communication | 2016 |
| Niobe Cars Limited | Wholesale & retail | 2015 |
| Nira Construction Limited | Construction | 2019 |
| Niralla Sweets Ltd. | Wholesale & retail | 2009 |
| Nisa Solutions Limited | Information & communication | 2010 |
| Nisha ABI Ltd | Wholesale & retail | 2025 |
| Nishop Management Services Ltd | Education | 2016 |
| Nissar Ltd | Other services | 2017 |
| Nistor Electrical Solutions Ltd | Construction | 2023 |