| Nareen Peters Limited | Administrative & support | 2015 |
| Naresh Patel Holdings Ltd | Financial services | 2018 |
| Narrative Options Ltd | Construction | 2016 |
| Narrative Options One Ltd | Extraterritorial | 2019 |
| Narrative Options Two Ltd | Extraterritorial | 2019 |
| Nascl Limited | Administrative & support | 2016 |
| Naseby Developements Limited | Construction | 2018 |
| Nasheman Properties Limited | Real estate | 2020 |
| Nasta Foods Limited | Hospitality | 2026 |
| Nasz SKLE3P Grocery Ltd | Wholesale & retail | 2024 |
| NAT & Matt Company Ltd | Wholesale & retail | 2016 |
| Natalie Britchford Osteopathy Limited | Health & social care | 2015 |
| Natan TRANS24 Ltd | Transport & logistics | 2024 |
| Natcan Limited | Public administration | 2019 |
| Nathania -Micheala Limited Company Ltd | Health & social care | 2014 |
| Nathanson Health Associates Limited | Health & social care | 2015 |
| Nathong Limited | Hospitality | 2012 |
| Nati Trans Ltd | Transport & logistics | 2017 |
| Nation Wide Drainage Solutions Limited | Water & waste | 2017 |
| National Cleaning Alliance Ltd | Administrative & support | 2025 |
| National Construction Services Ltd | Construction | 2015 |
| National Dental and Implant Centre Limited | Information & communication | 2018 |
| National Drone Ltd | Professional & scientific | 2019 |
| National Fire Protection Limited | Construction | 2024 |
| National Land Based College | Education | 2015 |
| National Netting Limited | Construction | 2022 |
| National PAT Compliance Ltd | Professional & scientific | 2026 |
| National Scaffold Design Consultants Ltd | Construction | 2022 |
| National Scaffolding Limited | Construction | 2022 |
| Nationwide HGV Solutions Ltd. | Wholesale & retail | 2020 |
| Nationwide Home Professionals Ltd | Construction | 2021 |
| Nationwide Taxi Services Limited | Construction | 2026 |
| Native Forestry Limited | Agriculture & fishing | 2018 |
| Natural Beauty Slimming Europe Ltd | Other services | 2018 |
| Natural Face Limited | Other services | 2007 |
| Natural Fingers Restaurant and Catering Services Ltd | Hospitality | 2024 |
| Natural Food Processing Limited | Manufacturing | 2019 |
| Natural HSE Ltd | Public administration | 2024 |
| Naturalis Clinical Aesthetics Ltd | Health & social care | 2024 |
| Nature Cleaning Company Limited | Administrative & support | 2025 |
| Natv Consulting Ltd | Information & communication | 2011 |
| Nauryz Management Systems Ltd | Administrative & support | 2025 |
| Nautical (UK) Capital Ltd | Professional & scientific | 2025 |
| Nautical Equipment Ltd | Professional & scientific | 2019 |
| Navageeth Investments Ltd | Financial services | 2024 |
| Naveed Anjum Ltd | Wholesale & retail | 2025 |
| Naviles Ltd | Real estate | 2025 |
| Naviture Ltd | Education | 2018 |
| Nawabi Properties Ltd | Real estate | 2025 |
| NAX Mechanical Ltd | Construction | 2018 |
| Nayab & Brothers Co. Ltd | Hospitality | 2025 |
| Nayigi Ltd | Wholesale & retail | 2018 |
| NAZ Electric 1 Limited | Other services | 2023 |
| Nazar Ltd | Hospitality | 2018 |
| Nazmara London Limited | Wholesale & retail | 2026 |
| Nazzah Properties Limited | Construction | 2023 |
| NB Energy Hero Ltd | Construction | 2025 |
| Nb&Son Roofing and Maintenance Ltd | Construction | 2024 |
| Nbbf Ltd | Wholesale & retail | 2023 |
| Nbfapoc Properties Limited | Real estate | 2006 |
| NBM Consulting Limited | Professional & scientific | 2023 |
| NBS Partnership Ltd | Real estate | 2022 |
| NC Carpentry (Northampton) Ltd | Extraterritorial | 2020 |
| NC Construct Limited | Construction | 2024 |
| NC Home Improvements Ltd | Construction | 2022 |
| NC9 Solutions Ltd | Professional & scientific | 2019 |
| Nccc Holdings Limited | Arts & recreation | 2016 |
| NCH 24 Ltd | Hospitality | 2025 |
| NCH Properties Limited | Hospitality | 2009 |
| NCJ Tech Consulting Ltd | Information & communication | 2024 |
| NCM Logistics Ltd | Transport & logistics | 2026 |
| NCM UK Logistics Ltd | Transport & logistics | 2019 |
| Ncnid Ltd | Information & communication | 2024 |
| NCR Construction & Management Services Ltd | Construction | 2018 |
| Ncr.Construct Limited | Construction | 2025 |
| Ncrystal Health Ltd | Health & social care | 2021 |
| NCS Interiors Ltd | Construction | 2019 |
| Nctb Ltd | Hospitality | 2022 |
| ND Freight Limited | Transport & logistics | 2017 |
| ND Solar Enterprises Ltd | Energy | 2019 |
| Ndataone Ltd | Information & communication | 2022 |
| NDC Electrical Ltd | Construction | 2020 |
| Ndca Ltd | Professional & scientific | 2023 |
| NDE Research Association | Professional & scientific | 2007 |
| Ndidi Emefiele Studios Limited | Arts & recreation | 2020 |
| NDL Group N Ltd | Construction | 2024 |
| NDM Spedizione Ltd | Transport & logistics | 2025 |
| NDS Recovery Services Ltd | Transport & logistics | 2023 |
| NDT Life Limited | Real estate | 2011 |
| Neacal Holdings Limited | Hospitality | 2013 |
| Neag Trans Ltd | Transport & logistics | 2015 |
| Neals Create Limited | Professional & scientific | 2014 |
| Nealwood Limited | Real estate | 1980 |
| Neatline Creative Limited | Professional & scientific | 2015 |
| Neav Property Ltd | Real estate | 2024 |
| Neave Transport Limited | Administrative & support | 2018 |
| Neaves of East Anglia Limited | Transport & logistics | 2018 |
| NEC Haulage Ltd | Transport & logistics | 2016 |
| Neddy Shed Limited | Wholesale & retail | 2019 |
| Nedora Essentials Ltd | Administrative & support | 2025 |