| Municola Ltd | Hospitality | 2020 |
| Murus Network Ltd | Administrative & support | 2025 |
| Muscleio Ltd | Manufacturing | 2025 |
| Music Magic Limited | Extraterritorial | 2017 |
| MW Amusements Limited | Arts & recreation | 1996 |
| MW Rail Services Ltd | Other services | 2019 |
| My Waiting Room Limited | Information & communication | 2024 |
| Mygotomarket Ltd | Information & communication | 2024 |
| Myli B Supplies Ltd | Wholesale & retail | 2020 |
| Myrtle Limited | Wholesale & retail | 2007 |
| N & K Steel Limited | Construction | 2012 |
| N & P Signs Ltd | Construction | 2023 |
| N & S Carpet Supplies Limited | Wholesale & retail | 2003 |
| N B Mortgages Ltd | Financial services | 2024 |
| N J Dawes Ltd | Construction | 2019 |
| N V Plastics Ltd | Water & waste | 2021 |
| Nailed IT Carpentry & Construction Limited | Construction | 2023 |
| Nathan Parker Ltd | Information & communication | 2014 |
| Natural HOW Ltd | Wholesale & retail | 2017 |
| Nature Gardens Limited | Construction | 2023 |
| Naturescape (Tonbridge) Limited | Real estate | 2021 |
| Nauticales Ltd | Hospitality | 2015 |
| Naylands (1-14) Limited | Households | 1990 |
| NC Car Sales Ltd | Wholesale & retail | 2026 |
| ND Rail Ltd | Other services | 2018 |
| Neal & Susie Engineering Limited | Professional & scientific | 2026 |
| Near by Builders Ltd | Construction | 2023 |
| Neath Ramsgate Slipways Limited | Construction | 2022 |
| Nelson Villas Limited | Households | 2006 |
| Nera Marketing Ltd | Professional & scientific | 2023 |
| Nera Service Pro Ltd | Professional & scientific | 2025 |
| Nest Zest Limited | Construction | 2026 |
| NET Gain Communities CIC | Arts & recreation | 2022 |
| Nethercourt Touring Park Ltd | Hospitality | 2017 |
| Neurokonect Ltd | Other services | 2026 |
| Neville Weston Limited | Professional & scientific | 2025 |
| New Lease of Life Properties Ltd | Real estate | 2024 |
| Newford Trading Limited | Hospitality | 2010 |
| Newington Community Association Limited | Other services | 2006 |
| Newlife Wills Ltd | Professional & scientific | 2019 |
| Next Vision Global Ltd | Wholesale & retail | 2026 |
| Ngrf Management Limited | Extraterritorial | 2015 |
| NHD Bletchley Ltd | Construction | 2020 |
| Nicelectrician Ltd | Wholesale & retail | 2022 |
| Nick Eason Limited | Professional & scientific | 2005 |
| Nick Fenton Associates Ltd | Professional & scientific | 2017 |
| Nickys Nursery Limited | Wholesale & retail | 2005 |
| Nirvana Legal Ltd | Professional & scientific | 2024 |
| NK Builders (Thanet) Ltd | Construction | 2025 |
| NO3 Digital Ltd | Professional & scientific | 2026 |
| Nomad Entertainment Group Ltd | Administrative & support | 2021 |
| Nomadic Miner Ltd | Mining & quarrying | 2021 |
| Normax Holdings Limited | Financial services | 2019 |
| North Ecom Services Ltd | Manufacturing | 2025 |
| North Enterprises Ltd | Wholesale & retail | 2025 |
| North Foreland Estate Limited | Real estate | 1925 |
| North Foreland Press Limited | | 1968 |
| North Gave Limited | Wholesale & retail | 2022 |
| North House Residents Association Ltd | Households | 2004 |
| Northdown Court Ltd | Households | 2015 |
| Northdown Park Residents Company Limited | Households | 1978 |
| Northforeland Holdings Ltd | Real estate | 2019 |
| Northrop Sails Limited | Administrative & support | 2002 |
| Northwood Club Limited | Hospitality | 2011 |
| Nortus Holdings Ltd | Financial services | 2026 |
| NOT 2 Envy Limited | Real estate | 2024 |
| Nothing Lost Ltd | Arts & recreation | 2019 |
| Notjuniorhumphrys Ltd | Professional & scientific | 2024 |
| Notjustballoons.Co.Uk Ltd | Wholesale & retail | 2000 |
| Novel Homes (Anchor Mews) Limited | Real estate | 2016 |
| Novel Homes (Droveway) Limited | Real estate | 2019 |
| Novel Homes (Waverley) Ltd | Real estate | 2019 |
| NPR Carpentry and Construction Ltd | Construction | 2014 |
| NPS (Deal) Limited | Real estate | 2013 |
| NPS (the Grove) Limited | Health & social care | 2017 |
| NPS Property (Eastbourne) Limited | Real estate | 2016 |
| NS Camps Ltd | Education | 2024 |
| Nsquared Developments Ltd | Construction | 2023 |
| Nsquared Holdings Ltd | Real estate | 2025 |
| Nuku Salon Limited | Wholesale & retail | 2022 |
| Nuvona Ltd | Wholesale & retail | 2019 |
| NVA Wifi ,Fibre Optic and Network Solutions Ltd | Information & communication | 2022 |
| Nvest Holdings Limited | Financial services | 2022 |
| O'Reilly's Entertainment Ltd | Hospitality | 2010 |
| Oak Hotel and Bar Limited | Hospitality | 2025 |
| Oakfinch Limited | Construction | 1987 |
| Oakland Court Consultants Limited | Professional & scientific | 2020 |
| Oakview Consultants Limited | Administrative & support | 1999 |
| Oasis Domestic Abuse Service Ltd | Hospitality | 2006 |
| Oasis Water Treatment Ltd | Water & waste | 2015 |
| Obbard Builders and Decorators Ltd | Construction | 2008 |
| Obrett Ltd | Construction | 2016 |
| Obsessions Salon Ltd | Other services | 2022 |
| Obsidiangym Limited | Arts & recreation | 2023 |
| Ocakli Ltd | Professional & scientific | 2022 |
| Ocean Drive Campers (Kent) Ltd | Extraterritorial | 2020 |
| Ocean Drive Management Company Limited | Households | 2018 |
| Ocwj Care Group Limited | Administrative & support | 2025 |
| Offvine Ltd | Administrative & support | 2024 |
| OG Property & Investment Ltd | Real estate | 2023 |