| Nimsbeautyspa Aesthetic Ltd | Other services | 2026 |
| Nina Construction Limited | Construction | 1989 |
| Nina Investments Limited | Real estate | 2005 |
| Nine Construction Limited | Construction | 2006 |
| Ningy Care Solutions Limited | Health & social care | 2022 |
| Ninju Ltd | Other services | 2021 |
| Nirvair Services Ltd | Administrative & support | 2025 |
| Nirwan Limited | Construction | 2014 |
| NIS22 Ltd | Construction | 2018 |
| Nisha Distributor Private Ltd | Wholesale & retail | 2024 |
| Nishan Kreations Limited | Hospitality | 2023 |
| Nistru Drylining Ltd | Construction | 2015 |
| Nita Kaur Holdings Limited | Real estate | 2021 |
| Nitor Ventilation Limited | Construction | 2017 |
| Nize Mobile World Limited | Wholesale & retail | 2012 |
| NJB Traffic Installation Ltd | Construction | 2023 |
| NJM Tiling Limited | Construction | 2011 |
| NJU Enterprise Limited | Professional & scientific | 2019 |
| Nlgtech Ltd | Information & communication | 2022 |
| NMD Transport Limited | Transport & logistics | 2015 |
| NO. 10 Film Limited | Information & communication | 2015 |
| NO. 3 Coffee Shop Ltd | Hospitality | 2023 |
| NO.4 Developments Ltd | Construction | 2025 |
| Noar Events Ltd | Administrative & support | 2020 |
| Noble Flights Private Ltd | Administrative & support | 2025 |
| Noblewave Solutions Ltd | Health & social care | 2023 |
| Noflames Limited | Construction | 2024 |
| Nook Accommodations Ltd | Households | 2019 |
| Noor Gardens Estate Ltd | Real estate | 2025 |
| Noorrock Limited | Real estate | 2025 |
| Norfiad Limited | Professional & scientific | 2025 |
| Norrenberger UK Limited | Administrative & support | 2021 |
| Norris Foods Ltd | Wholesale & retail | 2021 |
| North Fashion Ltd | Wholesale & retail | 2021 |
| North Kent Accountants Ltd | Professional & scientific | 2012 |
| North Kent Property Refurbishment Limited | Real estate | 2022 |
| North Kent Stone Limited | Construction | 2002 |
| North Sakara Consulting Limited | Information & communication | 2018 |
| Northdown One Management Company Ltd | Real estate | 2007 |
| Northend Minimarket Limited | Wholesale & retail | 2011 |
| Northend Property Investments Ltd | Real estate | 2024 |
| Northern Starlight Limited | Information & communication | 2018 |
| Northfall Design Associates Ltd | Professional & scientific | 1987 |
| Northfleet Construction Group Ltd | Construction | 2026 |
| Northfleet Properties Ltd | Real estate | 2023 |
| Northfleet Schools Co-Operative Trust | Education | 2011 |
| Northfleet Service Centre Ltd | Wholesale & retail | 2025 |
| Northgate MOT & Service Centre Limited | Wholesale & retail | 2022 |
| Norwood Lane Limited | Real estate | 2017 |
| Nostrada UK Limited | Transport & logistics | 2017 |
| Notable Woman Ltd | Wholesale & retail | 2019 |
| Notion Homes INT Limited | Real estate | 2025 |
| Notorious Bagels Ltd | Hospitality | 2026 |
| Notorious SAP Ltd | Hospitality | 2017 |
| Nova Mortgages Limited | Financial services | 2022 |
| Nova Placements Ltd | Other services | 2025 |
| Novabridge Retail Ltd | Wholesale & retail | 2025 |
| Novatrics Ltd | Information & communication | 2024 |
| Novus Interiors Limited | Construction | 2024 |
| NOW Start Limited | Real estate | 2022 |
| NOW You'Re Talking Network Ltd | Education | 2021 |
| NRB Solutions Ltd | Professional & scientific | 2014 |
| Nrsc Holdings Ltd | Financial services | 2021 |
| NS Financial Services Ltd | Financial services | 2020 |
| NS Industrial Automation Limited | Manufacturing | 2024 |
| NSA Tech Holdings Ltd | Financial services | 2024 |
| NSD Recruitment Services Ltd | Administrative & support | 2026 |
| Nsikanjohn Ltd | Health & social care | 2024 |
| NSP Assets Ltd | Administrative & support | 2022 |
| NSP Coatings Partnership LLP | | 2023 |
| NSP Group Holdings Ltd | Financial services | 2022 |
| NSP Management (Kent) Ltd | Administrative & support | 2022 |
| NTS Freight Ltd | Transport & logistics | 2021 |
| NTS Sealants Limited | Construction | 2014 |
| Nuben Property Investment Limited | Real estate | 2020 |
| Nudee Cycle Works Ltd | Wholesale & retail | 2018 |
| Nueva Vida Ltd | Health & social care | 2016 |
| Nukes Electrical Ltd | Construction | 2019 |
| Number Management Services Ltd | Wholesale & retail | 2025 |
| Nurib Trans Limited | Transport & logistics | 2019 |
| Nursery House Horton Kirby Freeholders Company Limited | Households | 2013 |
| Nursery Management Limited | Households | 1988 |
| NUTRIMAX4U Healthcare Ltd | Health & social care | 2023 |
| Nuvis Property Solutions Limited | Construction | 2016 |
| NWK Strength & Conditioning Limited | Arts & recreation | 2014 |
| NYK Trans Ltd | Transport & logistics | 2020 |
| Nyky Trans Ltd | Transport & logistics | 2016 |
| O T Associate Ltd | Administrative & support | 2014 |
| O&A Property Services Limited | Real estate | 2025 |
| O'Keeffe's Mortgage Services Ltd | Financial services | 2026 |
| O.M.C. Management Limited | Real estate | 1986 |
| O2N Ventures Ltd | Professional & scientific | 2019 |
| Oak Digital Consulting Ltd | Information & communication | 2024 |
| Oak Lodge Investments Ltd | Real estate | 2006 |
| Oakhurst Marketing Ltd | Professional & scientific | 2021 |
| Oaki Homes Ltd | Real estate | 2023 |
| Oakleaf Finance Ltd | Financial services | 2004 |
| Oakmont Wholesales Ltd | Wholesale & retail | 2026 |
| Oaktrees Court Management Co. (Chingford) Limited | Households | 1989 |
| Oakview Developments (Kent) Limited Liability Partnership | | 2022 |