| NAD Vision Ltd | Information & communication | 2025 |
| Nafeeseh Ltd | Manufacturing | 2019 |
| Nalam Trading Ltd | Wholesale & retail | 2018 |
| Nama Energy Ltd | Mining & quarrying | 2025 |
| Namz Care Ltd | Health & social care | 2018 |
| Nanev Transportation Ltd | Transport & logistics | 2025 |
| Nantucket Consulting Group Limited | Professional & scientific | 2015 |
| Narrativity Comms Limited | Information & communication | 2016 |
| Naseem Mubarak Ltd | Wholesale & retail | 2020 |
| Nasir Rana Limited | Transport & logistics | 2024 |
| NAT20: Fest Ltd | Hospitality | 2026 |
| Nathir Behnam Limited | Health & social care | 2014 |
| Natnic Tutorial Ltd | Education | 2018 |
| Natural Therapy’S UK Ltd | Health & social care | 2022 |
| Navab Trading Limited | Real estate | 2017 |
| Nawal Enterprises Ltd | Wholesale & retail | 2023 |
| NB Management Solutions Ltd | Administrative & support | 2010 |
| Ncs-New Construction Solutions Limited | Construction | 2022 |
| Neale Wadsworth Electrical Ltd | Manufacturing | 2016 |
| Nectar Gardens Limited | Administrative & support | 2015 |
| Nestbridge Estates Ltd | Real estate | 2025 |
| New Flow Plumbing & Heating Ltd | Construction | 2019 |
| New Malden Properties Limited | Real estate | 2003 |
| New Media Projects Limited | Information & communication | 2007 |
| New Street Communications Limited | Professional & scientific | 2025 |
| New World Inspiration (NWI) Ltd | Information & communication | 2013 |
| Newhex Tech Ltd | Manufacturing | 2014 |
| Newmans Sales Ltd | Wholesale & retail | 2018 |
| Next Door Property Clearances Ltd | Water & waste | 2024 |
| Nextgen Barber Ltd | Other services | 2025 |
| NGL Property Ltd | Real estate | 2024 |
| NIC Publishing Limited | Information & communication | 2016 |
| Nick LS Renovations Ltd | Construction | 2018 |
| Nik-Mar Ltd | Administrative & support | 2011 |
| Nineesha Ltd | Wholesale & retail | 2026 |
| Nivaan Limited | Administrative & support | 2016 |
| NK Sustainable Bioproducts Ltd | Professional & scientific | 2015 |
| NMA Sports Ltd | Wholesale & retail | 2020 |
| Noble Cost Engineering Services Ltd | Professional & scientific | 2014 |
| Noble Trading International Ltd | Wholesale & retail | 2018 |
| Noblecarpentry Ltd | Construction | 2020 |
| Nordic Development Limited | Administrative & support | 2020 |
| Normid Ltd | Wholesale & retail | 2022 |
| Normid Shipping Ltd | Transport & logistics | 2021 |
| Northcliff Solutions Ltd | Information & communication | 2023 |
| Notgroundbreaking Ltd | Professional & scientific | 2025 |
| Nova Arium Ltd | Arts & recreation | 2025 |
| Nova Launch Developments Limited | Information & communication | 2025 |
| Novapay Limited | Professional & scientific | 2022 |
| Novo Technology Ltd | Information & communication | 2012 |
| NRG Property Developements Ltd | Real estate | 2023 |
| NTS Beacon Ltd | Wholesale & retail | 2020 |
| NTS Estate Ltd | Real estate | 2021 |
| NTS Fuel Ltd | Wholesale & retail | 2019 |
| NTS Garage Ltd | Wholesale & retail | 2023 |
| NTS Grays Ltd | Wholesale & retail | 2020 |
| NTS Group Global Ltd | Wholesale & retail | 2020 |
| NTS Motor Fuel Ltd | Wholesale & retail | 2021 |
| NTS Retail Limited | Wholesale & retail | 2012 |
| NTS UK Properties (NO2) Ltd | Wholesale & retail | 2020 |
| NTS UK Properties Ltd | Real estate | 2021 |
| NTS UK Retail Ltd | Wholesale & retail | 2020 |
| Nulom Ltd | Other services | 2016 |
| Number Lemming Ltd | Professional & scientific | 2022 |
| NWG Group Ltd | Administrative & support | 2022 |
| O & a Services Limited | Extraterritorial | 2008 |
| O&D B2L Ltd | Real estate | 2023 |
| O'Neill Bespoke Limited | Manufacturing | 2023 |
| O.B.Y. Consulting Limited | Administrative & support | 2024 |
| O.G K9 Training Group Ltd | Administrative & support | 2022 |
| Oaflooring Ltd | Construction | 2025 |
| Oakley House Properties Ltd | Real estate | 2020 |
| Occamus Ltd | Professional & scientific | 2019 |
| OCD Fashion Ltd | Wholesale & retail | 2011 |
| Ohuwa Limited | Arts & recreation | 2018 |
| Olive Tree Oasis Ltd | Manufacturing | 2024 |
| Olivewood Electrical Ltd. | Energy | 2016 |
| Omira Assessment Group Ltd | Health & social care | 2025 |
| Omorfo Limited | Hospitality | 2016 |
| ON Your Mark Productions Limited | Information & communication | 2023 |
| One UK Trading Ltd | Wholesale & retail | 2014 |
| Only the Good Stuff Ltd | Wholesale & retail | 2019 |
| Onsteed Ltd | Wholesale & retail | 2024 |
| Onwood Carpentry & Joinery Ltd | Manufacturing | 2022 |
| Onwood Construction Ltd | Construction | 2022 |
| Onyou Ltd | Wholesale & retail | 2026 |
| Opensoft Technologies Limited | Information & communication | 2013 |
| OPN Management Limited | Professional & scientific | 2020 |
| Organic Herbal Beauty Ltd | Health & social care | 2019 |
| OUI Care Ltd | Wholesale & retail | 2026 |
| Ovvio Projects Ltd | Hospitality | 2025 |
| P & V Investments Limited | Real estate | 2016 |
| P J C Electrical Solutions Limited | Construction | 2009 |
| Palimax Limited | Professional & scientific | 2014 |
| Paltaos Limited | Information & communication | 2018 |
| Pamela Hutchinson Advisory Ltd | Other services | 2026 |
| Panetto Limited | Wholesale & retail | 2025 |
| Paper-Less Records Ltd | Professional & scientific | 2026 |
| Paramp Limited | Health & social care | 2022 |
| Paridan Ltd | Administrative & support | 2024 |