| My Fresh Prep Ltd | Hospitality | 2019 |
| My Other Cinema Limited | Manufacturing | 2012 |
| My Personalised Clothing Ltd | Manufacturing | 2021 |
| My Prickly Pet Limited | Extraterritorial | 2014 |
| My Safe Electrical Ltd | Construction | 2021 |
| Mygameperformance Ltd | Education | 2020 |
| Myrenovora Ltd | Professional & scientific | 2026 |
| Myrock Limited | Construction | 2018 |
| Mystic Bloom Limited | Wholesale & retail | 2025 |
| MZM Homes and Rentals Ltd | Real estate | 2025 |
| MZM Medical Services Ltd | Health & social care | 2024 |
| N S Landscapes Limited | Administrative & support | 2004 |
| N&E Affordable Property Limited | Real estate | 2016 |
| N-C-Y Ltd | Information & communication | 2016 |
| N.G. Dyer & J.R. Ringer Limited | Manufacturing | 1983 |
| N3S Property Ltd | Real estate | 2021 |
| Naba Studios CIC | Information & communication | 2025 |
| Nachi ENG Ltd | Professional & scientific | 2025 |
| Nadrai Ltd | Construction | 2024 |
| Nagor Properties Ltd | Real estate | 2019 |
| NAH Care Ltd | Health & social care | 2014 |
| Naid Care Limited | Health & social care | 2011 |
| Naidproject Ltd | Health & social care | 2017 |
| Nailed IT Nail & Spa Limited | Other services | 2023 |
| Nailux Limited | Other services | 2017 |
| Naim Pashkaj Limited | Construction | 2021 |
| Nala Holdings Limited | Health & social care | 2016 |
| NAM Healthcare Ltd | Health & social care | 2022 |
| Namcha Ltd | Hospitality | 2023 |
| Nandhu Properties Ltd | Real estate | 2021 |
| Naree Thai Ltd | Other services | 2024 |
| Nargis Joomun Ltd | Health & social care | 2019 |
| Nasco Digtec Ltd | Manufacturing | 1999 |
| Nashrah Property Ltd | Real estate | 2023 |
| Nathan Kingsbury Limited | Manufacturing | 2012 |
| National Online Wellbeing Services Ltd | Health & social care | 2018 |
| National Organisation for Responsible Micro, Small and Medium-Sized Businesses | Other services | 2022 |
| National Tutors Limited | Extraterritorial | 2023 |
| Nationwise Ltd | Administrative & support | 2025 |
| Natural A/C Limited | Construction | 1998 |
| Nature Plus Aesthetics Ltd | Other services | 2024 |
| NAV Diagnostics Ltd | Health & social care | 2022 |
| Navigate Accounting Solutions Limited | Professional & scientific | 2010 |
| Navitas Design Limited | Information & communication | 2013 |
| Nazreth Ltd | Health & social care | 2025 |
| NBV Logistics Ltd | Transport & logistics | 2023 |
| NCY Services Limited | Professional & scientific | 2017 |
| Ndala Consulting Ltd | Professional & scientific | 2024 |
| Ndezveduwo Services Ltd | Health & social care | 2022 |
| NDT MAN Limited | Professional & scientific | 2024 |
| Neadframes Limited | Wholesale & retail | 2011 |
| Nedkov Deliveries Ltd | Transport & logistics | 2022 |
| Nedkov Limited | Transport & logistics | 2016 |
| Neel Property Ventures Ltd | Real estate | 2022 |
| Nelly Mcnally Southend Limited | Other services | 2023 |
| Nelson Road Management Co. (NO.1) Limited | Other services | 1988 |
| Nelson Roofing Contractors Limited | Construction | 2008 |
| Nelson Technology Limited | Information & communication | 2017 |
| Neomina Ltd | Real estate | 2024 |
| Neptune Engineering Consultants Ltd | Professional & scientific | 2024 |
| Neratech Ltd | Information & communication | 2025 |
| Nesavaali Ltd | Wholesale & retail | 2018 |
| Nest College London Ltd | Education | 2024 |
| Net-Zero Consulting Services Ltd | Professional & scientific | 2021 |
| Netherhall Gardens Management Company Limited | Households | 2001 |
| Neural Networkers Ltd | Information & communication | 2018 |
| Neuronotion Ltd | Other services | 2018 |
| Neurorobotics Limited | Professional & scientific | 2005 |
| New Body Gym Ltd | Arts & recreation | 2017 |
| New Body Health and Fitness Ltd | Arts & recreation | 2025 |
| New Energy - Kent Limited | Energy | 2015 |
| New ERA Repairs Limited | Wholesale & retail | 2019 |
| New Evolved Work Solutions Ltd | Construction | 2024 |
| New Indie Film Ltd | Information & communication | 2019 |
| New Innovix Solutions Limited | Information & communication | 2025 |
| New Keralam Ltd | Hospitality | 2017 |
| New Omega Ltd | Information & communication | 2019 |
| New Orient Creations Ltd | Wholesale & retail | 2025 |
| New Path Residential Ltd | Hospitality | 2019 |
| New Phase Developments Limited | Construction | 2015 |
| New Roofing Specialists Limited | Construction | 2012 |
| New Style Decoration Ltd | Construction | 2025 |
| New Zone Property Limited | Real estate | 2006 |
| Newgate Electrical Ltd | Construction | 2018 |
| Newkaybee Ltd | Other services | 2024 |
| Newman & Walsh Properties Limited | Real estate | 2025 |
| Nexafrica Limited | Administrative & support | 2024 |
| Nexlynx Limited | Wholesale & retail | 2015 |
| Next Block Ltd | Real estate | 2026 |
| Next Generation Developments Ltd | Construction | 2024 |
| Next Level Training Limited | Administrative & support | 2007 |
| Nextdaybroadband Ltd | Wholesale & retail | 2026 |
| Nextgen Law Ltd | Health & social care | 2018 |
| Nextgentech Consultants Limited | Information & communication | 2025 |
| Nexus Wellbeing CIC | Health & social care | 2022 |
| NI Team Works Ltd | Construction | 2025 |
| Niche Mortgage Solutions Limited | Financial services | 2023 |
| Niche of Leigh Limited | Wholesale & retail | 2010 |
| Nichols Carpentry Ltd | Manufacturing | 2024 |
| Nifina Limited | Information & communication | 2025 |