| Nacho Factory Retail Limited | Hospitality | 2024 |
| Nadia Hayes Counselling Services Limited | Health & social care | 2025 |
| Nadous Takeaway Limited | Hospitality | 2021 |
| Nads Car Hire Ltd | Administrative & support | 2015 |
| Naff Limited | Manufacturing | 2024 |
| Naga Doner Ltd | Hospitality | 2026 |
| Naga Willenhall Limited | Hospitality | 2019 |
| Nagashriram Limited | Real estate | 2024 |
| Nahna Ltd | Hospitality | 2023 |
| Nahussain Ltd | Wholesale & retail | 2025 |
| Nail Harmony Essex Limited | Wholesale & retail | 2012 |
| Nails by Alex Ltd | Other services | 2022 |
| NAK Project Services Limited | Professional & scientific | 2023 |
| Naked Fine Wine Bonds PLC | Wholesale & retail | 2013 |
| Naked Homes Ltd | Other services | 2023 |
| Naked Marketing Holdings Limited | Financial services | 2020 |
| Naked Marketing Limited | Professional & scientific | 2002 |
| Naked Wines Employee Share Ownership Trust Limited | Administrative & support | 1995 |
| Naked Wines International Limited | Professional & scientific | 2011 |
| Naked Wines PLC | Wholesale & retail | 1988 |
| Naked Wines Prepayments Trustee Company Limited | Wholesale & retail | 2008 |
| Naken Interiors Ltd | Wholesale & retail | 2011 |
| Nally Hand Car Wash Ltd | Administrative & support | 2022 |
| Nalora Limited | Professional & scientific | 2021 |
| Nalyat Limited | Hospitality | 2020 |
| Namaste Village Global Limited | Hospitality | 2023 |
| Namaste Village Norwich Limited | Hospitality | 2018 |
| Nancy L Arnold Limited | Other services | 2025 |
| Nancyboo Limited | Information & communication | 2014 |
| Nandak Ltd | Administrative & support | 2024 |
| Nanna's Coffee on Wheels Ltd | Hospitality | 2025 |
| Nanny Childcare Ltd | Administrative & support | 2020 |
| Nanotech Limited | Professional & scientific | 2011 |
| Nanotech Software Limited | Information & communication | 2010 |
| Napa Holdings Limited | Construction | 2019 |
| Narai Ltd | Professional & scientific | 2017 |
| Narc Productions Limited | Information & communication | 2020 |
| Narc Studio Limited | Wholesale & retail | 2020 |
| Narralect Ltd | Information & communication | 2026 |
| Narrow Gauge Railways Limited | Transport & logistics | 1998 |
| NAS Commercial Repairs Limited | Wholesale & retail | 2016 |
| NAS Projects Limited | Real estate | 2009 |
| Naseby Bloodstock Limited | Agriculture & fishing | 2013 |
| Nasef Medical Ltd | Health & social care | 2026 |
| Nasht Property Ltd | Real estate | 2017 |
| Nat's Bakes Limited | Hospitality | 2022 |
| Natabene Ltd | Wholesale & retail | 2024 |
| Natalie Seatter Ltd | Professional & scientific | 2018 |
| Natems Sugar Holdings (UK) Ltd | Energy | 2016 |
| Nathan Fake Limited | Information & communication | 2017 |
| Nathansons Ltd | Manufacturing | 2025 |
| National Breakdown Recovery Club Limited | Professional & scientific | 1990 |
| National Centre for Writing | Arts & recreation | 2004 |
| National Engineering Group Ltd | Construction | 2025 |
| National Fire Ltd | Professional & scientific | 2012 |
| National Parking Enforcement Limited | Administrative & support | 2012 |
| National Polo Academy Limited | Extraterritorial | 2008 |
| Nationwide Breakdown Recovery Services Limited | Professional & scientific | 1977 |
| Nationwide EPC Ltd | Construction | 2015 |
| Nationwide Scaffolding Services Limited | Construction | 2005 |
| Nationwide Vehicle Movements Limited | Transport & logistics | 1997 |
| Native Marketing Ltd | Professional & scientific | 2025 |
| Native Reality Ltd | Arts & recreation | 2024 |
| Nattergal Limited | Agriculture & fishing | 2021 |
| Nattergal Managed Services Limited | Professional & scientific | 2024 |
| Nattergal Nominees Limited | Extraterritorial | 2024 |
| Natural Capital Projects Limited | Professional & scientific | 2016 |
| Natural Energy Generation Limited | Energy | 2011 |
| Natural Energy Resources (OIL & GAS) Limited | Mining & quarrying | 2026 |
| Natural Holdings Ltd | Extraterritorial | 2023 |
| Natural Lighting Ltd | Information & communication | 2012 |
| Natural Living Products Limited | Wholesale & retail | 1993 |
| Natural Resources Europe Limited | Professional & scientific | 2012 |
| Natural Skin Medical Aesthetics Limited | Health & social care | 2026 |
| Naturally Bionic Ltd | Manufacturing | 2025 |
| Naturemind AI Limited | Professional & scientific | 2025 |
| Natures Fuels Ltd | Wholesale & retail | 2021 |
| Natures Menu Limited | Manufacturing | 1981 |
| Naturescene Ltd | Professional & scientific | 2024 |
| NAV Prop Holdings Ltd | Real estate | 2022 |
| Navello Limited | Financial services | 2023 |
| Navenby Energy Centre Limited | Energy | 2023 |
| Navex Electrical Limited | Construction | 2016 |
| Navigator Travel Insurance Services Limited | Financial services | 1999 |
| Naxi Properties Ltd | Real estate | 2014 |
| Nayvani Enterprise Ltd | Wholesale & retail | 2025 |
| NAZ a NAZ Frozen Foods UK Ltd | Manufacturing | 2012 |
| NAZ Spice Dodsworth Ltd | Hospitality | 2022 |
| Nazar Enterprises Ltd | Administrative & support | 2021 |
| NB Gynaecology Limited | Health & social care | 2019 |
| NB Installations Ltd | Construction | 2020 |
| NBF Clothing Ltd | Wholesale & retail | 2023 |
| NBG Commercial Investments Limited | Real estate | 2025 |
| NBG Homes Limited | Real estate | 2025 |
| NBI Partnership Limited | Administrative & support | 2012 |
| NBK Solutions Ltd | Professional & scientific | 2018 |
| Nbsg Safety Ltd | Construction | 2024 |
| NBT Training Ltd | Education | 2018 |
| NC Aviation Limited | Other services | 2012 |
| NC Beauty Consulting Ltd | Manufacturing | 2022 |