| Mundie Mundial Ltd | Information & communication | 2020 |
| Muni Properties Ltd | Real estate | 2021 |
| Murphy's Residential Lettings Limited | Real estate | 2016 |
| Music Maestro Group Ltd | Information & communication | 2018 |
| Musical Coherence Limited | Manufacturing | 2006 |
| MVH Advisory Limited | Professional & scientific | 2025 |
| MW Construction and Carpentry Limited | Manufacturing | 2023 |
| My Management Agency Limited | Administrative & support | 2022 |
| My Nara Ltd | Information & communication | 2021 |
| My Trauma Therapy Limited | Health & social care | 2021 |
| MYCOMMERCE804 Ltd | Wholesale & retail | 2025 |
| MYM Property Lawyers Ltd | Professional & scientific | 2025 |
| Mzaman Holdings NO1 Ltd | Real estate | 2025 |
| Mzaman Holdings NO2 Ltd | Real estate | 2023 |
| Mzaman Holdings NO3 Ltd | Real estate | 2023 |
| Mzaman Holdings NO4 Ltd | Real estate | 2026 |
| N Stanley Properties Ltd | Construction | 2024 |
| Nable Management Consultancy Limited | Professional & scientific | 2006 |
| Nagle Office Limited | Financial services | 2026 |
| Nagpal Properties Limited | Real estate | 2015 |
| Namo SAI Limited | Information & communication | 2014 |
| Nannies Matter Ltd | Administrative & support | 2013 |
| Narcot Court 4147 RTE Company Limited | Hospitality | 2003 |
| Nargisbai Limited | Other services | 2025 |
| Naturel Smiles Ltd | Real estate | 2019 |
| Neat Clean Limited | Administrative & support | 2018 |
| Nedac Financial Solutions Limited | Financial services | 2011 |
| NEE Labs Limited | Manufacturing | 2025 |
| Neesham Estates Limited | Real estate | 2017 |
| Neil Tomlinson Architects Limited | Professional & scientific | 2007 |
| Neoteric Holdings Limited | Professional & scientific | 2018 |
| Neoteric Property Developments Limited | Construction | 2018 |
| Neoteric Safety and Environment Limited | Professional & scientific | 2026 |
| Neovation Consultancy Services Limited | Information & communication | 2024 |
| Nesmbi Limited | Information & communication | 2016 |
| Netsyp Limited | Real estate | 2007 |
| Never Worry Studio Limited | Professional & scientific | 2019 |
| New Close Developments Limited | Real estate | 2021 |
| New ERA Intelligent Solutions Limited | Administrative & support | 2004 |
| New ERA Upholstery Limited | Manufacturing | 2023 |
| New Model Fintech Limited | Financial services | 2019 |
| New Model Growth Ltd | Financial services | 2022 |
| New Model Healthcare Limited | Financial services | 2021 |
| New Model Nominees Limited | Financial services | 2016 |
| New Model PE Ltd | Financial services | 2022 |
| New Model PE2 Limited | Financial services | 2020 |
| New Model Secondaries Ltd | Financial services | 2022 |
| New Model Venture Capital Limited | Financial services | 2011 |
| Newcastle Investors Freehold Ltd | Real estate | 2020 |
| Newesco Ltd | Professional & scientific | 2017 |
| Nexpay Limited | Financial services | 2017 |
| Next Page Psychology Services Ltd | Health & social care | 2023 |
| Nextgemacademy Ltd | Education | 2019 |
| Nexus Consultancy Limited | Information & communication | 2009 |
| NH Tiling Ltd | Construction | 2025 |
| Nicky J Limited | Other services | 2015 |
| Night Train Limited | Hospitality | 2024 |
| Nightingales Care Limited | Health & social care | 2002 |
| Nikhil Engineering Services Limited | Professional & scientific | 2016 |
| Nimrod Property Investments Limited | Administrative & support | 2010 |
| Niranthi Limited | Financial services | 2015 |
| Nirbhau Holdings Ltd | Health & social care | 2025 |
| Nixon Psychology Limited | Health & social care | 2020 |
| NJW Limited | Information & communication | 1993 |
| NK Pharmacare Limited | Health & social care | 2013 |
| NKD Nutrition Ltd | Administrative & support | 2023 |
| NM Hospitality Enterprises Ltd | Hospitality | 2025 |
| Nmvc FT Limited | Financial services | 2019 |
| Nmvc Regcap Limited | Financial services | 2019 |
| Nmvc SPV H Limited | Financial services | 2018 |
| Nmvc SPV One Limited | Financial services | 2014 |
| Nmvc SPV X Ltd | Financial services | 2017 |
| NN Studios Ltd | Other services | 2024 |
| NO 8RAND Ltd | Wholesale & retail | 2025 |
| NO Time for Waste Ltd | Professional & scientific | 2025 |
| Noah ( Reading) Ltd | Professional & scientific | 2025 |
| Nobi Medical Limited | Wholesale & retail | 2016 |
| Noble West Properties Limited | Real estate | 2018 |
| Noel Square Management Company Limited | Real estate | 2014 |
| Noisy Beast UK Limited | Professional & scientific | 2014 |
| Nomad Apps Ltd | Information & communication | 2016 |
| North Hill Court Investments Ltd | Construction | 2020 |
| North Hill Court Land Ltd | Construction | 2022 |
| North Park Consulting Ltd | Professional & scientific | 2013 |
| North Point Holdings Limited | Administrative & support | 2017 |
| North Point Ventures III Limited | Real estate | 2023 |
| North Point Ventures Limited | Real estate | 2019 |
| NORTH49 Ltd | Real estate | 2025 |
| Northbridge Intelligence Ltd | Administrative & support | 2026 |
| Northern Star Estates Ltd | Real estate | 2025 |
| Northfields Business Centre Limited | Construction | 2015 |
| Northstar Advisory Partners Limited | Professional & scientific | 2025 |
| Notre Maison Restaurant Ltd | Hospitality | 2022 |
| Nova Property Management Limited | Real estate | 2023 |
| Novarok Ltd | Information & communication | 2026 |
| Noventa Medicare Limited | Wholesale & retail | 2024 |
| Novo London Limited | Administrative & support | 2009 |
| Novus Change Ltd | Professional & scientific | 2026 |
| NOW Aluminium Ltd | Wholesale & retail | 2019 |
| NPW Tibby Limited | Other services | 2026 |