| MV Childcare 2020 Ltd | Health & social care | 2024 |
| MV Lettings Limited | Real estate | 2020 |
| MV Lift Ltd | Other services | 2018 |
| MVP Heating Ltd | Construction | 2020 |
| Mvuk Consulting Ltd | Professional & scientific | 2025 |
| MWH Medical Associates Ltd | Health & social care | 2026 |
| My Builder YG Ltd | Construction | 2022 |
| My Home Lovely Ltd | Information & communication | 2017 |
| My Remarkable Mind CIC | Education | 2026 |
| My Social Media PA Ltd | Professional & scientific | 2012 |
| My Ware Design Ltd | Information & communication | 2015 |
| Myaussie Ltd | Wholesale & retail | 2022 |
| Mybarberplus Ltd | Other services | 2022 |
| Myriad Market Ltd | Wholesale & retail | 2019 |
| Mysa Clinic Limited | Other services | 2026 |
| Mystique World Travels Ltd | Administrative & support | 2024 |
| MZA Trading Ltd | Transport & logistics | 2017 |
| N ALI & Co. Ltd | Professional & scientific | 2012 |
| N K Heating Ltd | Other services | 2015 |
| N Mayengo Limited | Health & social care | 2022 |
| N.T.R Jewellery and Clothes Ltd | Wholesale & retail | 2018 |
| N2 Lettings and Management Ltd | Real estate | 2016 |
| NAA Dedei Ltd | Professional & scientific | 2022 |
| Nabateo Ltd | Financial services | 2018 |
| Nabeel HMC Halal Meat Supplier Limited | Wholesale & retail | 2020 |
| Nabtasoft Ltd | Information & communication | 2014 |
| Naet UK Ltd | Information & communication | 2006 |
| Nafad Limited | Health & social care | 2024 |
| Nagul Services Ltd | Real estate | 2014 |
| Nail Land Limited | Other services | 2026 |
| Naip Limited | Real estate | 2020 |
| Namakhya Limited | Health & social care | 2014 |
| Nana AMA Hair Salon Ltd | Other services | 2020 |
| Nangpal Traders Ltd | Wholesale & retail | 2016 |
| NAS Consultancy Services Ltd | Wholesale & retail | 2019 |
| Naseem Agri Farm Limited | Agriculture & fishing | 2009 |
| Nashi&Mushi Ltd | Wholesale & retail | 2022 |
| Nashnets Ltd | Professional & scientific | 2023 |
| Nashtex Limited | Wholesale & retail | 2014 |
| Natasha Marburger Productions Ltd | Information & communication | 2013 |
| Nate Construction Ltd | Construction | 2022 |
| National Housing Maintenance Forum Limited | Other services | 2021 |
| Natkofi Ltd | Health & social care | 2025 |
| Nature's Inn Limited | Wholesale & retail | 2021 |
| Natvee Ltd | Health & social care | 2022 |
| Navay Ltd | Real estate | 2025 |
| Naveed and Umer Builders Ltd | Wholesale & retail | 2026 |
| Navras Investments Ltd | Extraterritorial | 2013 |
| Naza Ltd | Wholesale & retail | 2022 |
| Nazaha Properties Ltd | Real estate | 2026 |
| Nazok Ltd | Wholesale & retail | 2011 |
| NB Resources Ltd | Construction | 2019 |
| NBS Scaffolding Limited | Construction | 2016 |
| NC Property Management Services Limited | Households | 2024 |
| Nebo Corp Ltd | Information & communication | 2025 |
| Nebula Enterprises Limited | Professional & scientific | 2023 |
| Nectar Consultants Limited | Professional & scientific | 2023 |
| Neliros Ltd | Construction | 2014 |
| Nelson’S Studio Limited | Wholesale & retail | 2024 |
| Neon Dawn Limited | Health & social care | 2025 |
| Nero Building Work Ltd | Construction | 2019 |
| Nestiver Group Ltd | Wholesale & retail | 2023 |
| NET2SOURCE Global Workforce Solutions Ltd | Information & communication | 2018 |
| Netconfident Ltd. | Information & communication | 2007 |
| Neumann Properties Ltd | Real estate | 2025 |
| New Brands Asia Limited | Hospitality | 2017 |
| New Enhanced Technologies Ltd | Wholesale & retail | 2001 |
| New ERA Contractors Limited | Construction | 2018 |
| New Horizon Education Consulting Limited | Education | 2014 |
| New Ocean Accounting Services Limited | Professional & scientific | 2008 |
| New Sahana Hair & Beauty Service (UK) Limited | Other services | 2011 |
| New Smart Living Limited | Construction | 2012 |
| New Strand Motor Ltd | Manufacturing | 2015 |
| Newbold Systems Limited | Other services | 2013 |
| Newedge Networks Ltd | Information & communication | 2024 |
| NEWLIFE7 Ltd | Administrative & support | 2026 |
| Newmoss Tyres Ltd | Wholesale & retail | 2020 |
| Nexara Global Trading Ltd | Wholesale & retail | 2025 |
| Next Driving School Ltd | Education | 2026 |
| Next Space SW Ltd | Construction | 2025 |
| Nexterahub Ltd | Wholesale & retail | 2025 |
| Nextrade Venture Limited | Wholesale & retail | 2024 |
| Nexus Martial Arts & Fitness Ltd | Arts & recreation | 2026 |
| Nexvora Technologies Ltd | Other services | 2026 |
| Neziak Ltd | Real estate | 2021 |
| NG Tunnelling Limited | Construction | 2014 |
| Ngoemy Ltd | Health & social care | 2024 |
| Ngok Property Ltd | Real estate | 2023 |
| Ngqungqushe Ltd | Health & social care | 2019 |
| NGU Models Ltd | Professional & scientific | 2024 |
| Ngugallery Ltd | Wholesale & retail | 2025 |
| Nhgoods Ltd | Wholesale & retail | 2025 |
| Nhmf (NPC) Limited | Professional & scientific | 2022 |
| Nightingale Nurses Association UK | Other services | 2017 |
| Nightpress Security Limited | Administrative & support | 2024 |
| NIK BOR 17 Ltd | Construction | 2023 |
| NIK30 Limited | Hospitality | 2024 |
| Niki Moyo Limited | Wholesale & retail | 2020 |
| Nipoori KS UK Distributors Ltd | Wholesale & retail | 2026 |
| Nipun UK Ltd | Transport & logistics | 2016 |