| Nimbus IT Solutions Ltd | Information & communication | 2007 |
| Nimi Ltd | Wholesale & retail | 2018 |
| Nine Worlds Brewing Company Limited | Manufacturing | 2021 |
| Nirick Corporate Finance Limited | Professional & scientific | 2010 |
| Nirmana Tech Ventures Ltd | Information & communication | 2022 |
| Nirvana Equitas Ltd | Financial services | 2015 |
| Nirvana Group Holdings Limited | Financial services | 2022 |
| Nirvana Maintenance Limited | Construction | 2013 |
| Nisa Sevenoaks Ltd | Wholesale & retail | 2025 |
| Nisus UK Limited | Professional & scientific | 1990 |
| Nivahana Holdings Limited | Real estate | 2021 |
| Niyam Teck Limited | Information & communication | 2015 |
| Nizels Residential Management Co Limited | Real estate | 2007 |
| NJ Coaching Limited | Administrative & support | 2015 |
| Nj.Belton Homes Ltd | Real estate | 2024 |
| NK Project Services Limited | Professional & scientific | 2025 |
| NKM Fire Installations Limited | Construction | 2010 |
| NMK Consulting Limited | Information & communication | 2004 |
| NO Shows Ltd | Administrative & support | 2020 |
| NO to New ASH Green Solar Limited | Other services | 2024 |
| Noah Optics Ltd | Wholesale & retail | 2016 |
| Noemi Studios Ltd | Education | 2025 |
| Noise in Colour Ltd | Arts & recreation | 2014 |
| Nordmeridian Ltd | Wholesale & retail | 2026 |
| Norham Farm Limited | Financial services | 2025 |
| Norris Castle Estate (Group) Ltd | Construction | 2016 |
| Norris Castle Estate (Group) PC 1 Ltd | Construction | 2020 |
| Norris Castle Estate (Group) PC 2 Ltd | Construction | 2020 |
| Norris Castle Estate (Group) PC 3 Ltd | Construction | 2020 |
| Norris Castle Estate (Group) PC 4 Ltd | Construction | 2020 |
| Norris Castle Estate (Group) PC 5 Ltd | Construction | 2020 |
| Norris Castle Estate (Group) PC 6 Ltd | Construction | 2020 |
| Norris Castle Estate (Group) PC 8 Ltd | Construction | 2020 |
| North Atlantic Research and Survey Limited | Professional & scientific | 2018 |
| North Downs Bookkeeping Ltd | Professional & scientific | 2026 |
| North Downs Cheese Limited | Manufacturing | 2002 |
| North Frith Main House Limited | Households | 2004 |
| North Frith Management Limited | Households | 1999 |
| Northchurch Homes Limited | Construction | 2004 |
| Northfield 5 Limited | Arts & recreation | 2022 |
| Norton Crathorne (NO 1) Limited | Hospitality | 1999 |
| Norton Crathorne (NO 2) Limited | Hospitality | 1999 |
| Norwood Residency Ltd | Construction | 2025 |
| NOT Private Equity Limited | Financial services | 2025 |
| Notos Shipping Limited | Administrative & support | 2017 |
| Notus Support Holding Limited | Financial services | 2026 |
| Notus Support Services Limited | Administrative & support | 2025 |
| Nouvelle Lune Ltd | Wholesale & retail | 2026 |
| Nova Energy Partners Ltd | Construction | 2024 |
| Nova Locks Ltd | Health & social care | 2024 |
| Nova Mortgage Solutions Ltd | Financial services | 2019 |
| Nova Power Group Ltd | Construction | 2024 |
| Nova Twins Ltd | Arts & recreation | 2017 |
| Novabook Treasury Limited | Financial services | 2026 |
| Novaworks Ltd | Construction | 2019 |
| Novi Coeptus Search Ltd | Administrative & support | 2024 |
| Novic Limited | Real estate | 2025 |
| Novionai Limited | Information & communication | 2024 |
| Novus Vita Health Ltd | Health & social care | 2018 |
| NOW Planning Limited | Professional & scientific | 2015 |
| Now-U CIC | Information & communication | 2020 |
| NPC Special Projects Limited | Administrative & support | 2012 |
| NPS Global Ltd | Administrative & support | 2017 |
| NS Holdings Ltd | Wholesale & retail | 2024 |
| NSC Energy Ltd | Wholesale & retail | 2024 |
| Nshaikh Ltd | Real estate | 2025 |
| NT Digital Media Ltd | Information & communication | 2013 |
| NTN Building Services Ltd | Construction | 2015 |
| Nubit Limited | Information & communication | 2018 |
| Nubrick Conservation & Restoration Ltd | Construction | 2025 |
| Nudge Partners Ltd | Professional & scientific | 2023 |
| Nueva Consulting Ltd | Professional & scientific | 2022 |
| Nugit Ltd | Information & communication | 2026 |
| Number Conundrums Limited | Professional & scientific | 2014 |
| NUMBER14AAE Ltd | Professional & scientific | 2024 |
| Nuneaton Property Developers Limited | Construction | 2007 |
| Nuravision Ltd | Health & social care | 2020 |
| Nutbrook Studios LLP | | 2010 |
| Nutfields Property Services Limited | Real estate | 2000 |
| Nuthatch Productions Ltd | Arts & recreation | 2021 |
| Nutrax Management Services Limited | Professional & scientific | 2009 |
| Nuttyogoo Ltd | Manufacturing | 2020 |
| Nuxley Roofing & Construction Limited | Construction | 2019 |
| NW Design Studio Ltd | Professional & scientific | 2021 |
| O&P Properties Limited | Real estate | 2021 |
| O'Brien Homes and Developments Limited | Construction | 2021 |
| O.Kahn Trading Ltd | Wholesale & retail | 2025 |
| OA 12 Ltd | Real estate | 2022 |
| OA Medicals Limited | Health & social care | 2013 |
| Oak & River Education Ltd. | Professional & scientific | 2025 |
| Oak Close Residents Association Limited | Households | 1985 |
| Oak Court (Denbridge) Residents Ltd | Real estate | 2008 |
| Oak Craft Beer Co Ltd | Administrative & support | 2017 |
| Oak Grove Contractors Ltd | Construction | 2016 |
| Oak House Residents RTM Company Limited | Households | 2021 |
| Oak Tree Close Residents Management Company Limited | Households | 2011 |
| Oakdale Park (Maidstone) Limited | Hospitality | 2022 |
| Oakengreen Horticulture Ltd | Administrative & support | 2026 |
| Oakhill Road, Sevenoaks, Limited | Households | 1932 |
| Oakhurst Maidstone Limited | Construction | 2022 |