| Murahwa Ltd | Health & social care | 2015 |
| Mushtaq Orthopaedic Healthcare Limited | Health & social care | 2015 |
| MV Building & Electrical Ltd | Administrative & support | 2015 |
| MVM Interior Ltd | Construction | 2016 |
| Mvna Limited | Construction | 2020 |
| Mwhaha Media Limited | Information & communication | 2025 |
| My Cafe Welling Ltd | Hospitality | 2021 |
| My Personal Bible Journal CIC | Wholesale & retail | 2024 |
| Mywantshop Ltd | Wholesale & retail | 2026 |
| N & S Sharma Property Holdings Limited | Real estate | 2025 |
| N Nowbuth Ltd | Real estate | 2024 |
| N R I Construction Ltd | Construction | 2019 |
| N S Construction (PVT) Ltd | Construction | 2021 |
| N&I Solutions Ltd | Construction | 2023 |
| NA Domestic Services Ltd | Administrative & support | 2024 |
| Nadban Properties Ltd | Real estate | 2022 |
| Naf-Fat Ltd | Hospitality | 2014 |
| Nagella Solutions Ltd | Information & communication | 2017 |
| Nahboyszn Ltd | Administrative & support | 2023 |
| Nalsel Ltd | Extraterritorial | 2011 |
| Namo Limited | Information & communication | 2018 |
| Nand Food and Wine Ltd | Wholesale & retail | 2023 |
| Nanthu Trading Ltd | Wholesale & retail | 2025 |
| Nanu Properties Limited | Real estate | 2022 |
| Naoby Ltd | Administrative & support | 2015 |
| NAS Holdings Limited | Real estate | 2017 |
| Nasyfix Ltd | Construction | 2023 |
| Natali Ltd | Wholesale & retail | 2025 |
| Natavan Building Ltd | Construction | 2017 |
| Naturally Chinese Ltd | Hospitality | 2011 |
| Nature Faithfuls Limited | Manufacturing | 2011 |
| Navitas Developments Ltd | Construction | 2016 |
| NDC Retail Ltd | Wholesale & retail | 2022 |
| Nebula Tech Limited | Information & communication | 2009 |
| Neck & Neck Productions Ltd | Information & communication | 2024 |
| Neelkamal Properties Limited | Real estate | 2019 |
| Neer Prime Limited | Wholesale & retail | 2025 |
| Neoautomate Limited | Information & communication | 2024 |
| Neoepione Care Limited | Health & social care | 2017 |
| Nepali Link Ltd | Information & communication | 2020 |
| Nepali Youth Association | Arts & recreation | 2014 |
| Neptuneglow Ltd | Wholesale & retail | 2020 |
| Nera Chauffeurs Ltd | Transport & logistics | 2023 |
| Neunest Limited | Real estate | 2026 |
| Neuronaut Ltd | Professional & scientific | 2022 |
| New Kingshill Sushi Ltd | Wholesale & retail | 2020 |
| New Mill Hill Sushi Ltd | Hospitality | 2019 |
| Newborn Memories Limited | Other services | 2017 |
| Newwave AI Limited | Administrative & support | 2024 |
| Nexa International Group Ltd | Wholesale & retail | 2025 |
| Nexcorp Consulting Limited | Professional & scientific | 2024 |
| Nexi BOT Ltd | Wholesale & retail | 2025 |
| Next Day Productions Ltd | Information & communication | 2010 |
| Next Steps Homes Ltd | Health & social care | 2024 |
| Next-Gen Concierge Ltd | Administrative & support | 2023 |
| Nextalmas Ltd | Wholesale & retail | 2026 |
| Nextwave MT Ltd | Wholesale & retail | 2026 |
| Niagara Retail Limited | Wholesale & retail | 2020 |
| Nicholas Motors Limited | Wholesale & retail | 2011 |
| Nickie's Nippers PRE School Ltd | Health & social care | 2021 |
| Nigerian Muslim Community Greenwich UK Limited | Other services | 2021 |
| Nii.C.La Ltd | Wholesale & retail | 2023 |
| Nimal Building Constructions Ltd | Construction | 2024 |
| Nina LEE Management Limited | Arts & recreation | 2013 |
| Nipan Ltd | Real estate | 2024 |
| Nirvana Estate Agency Ltd | Real estate | 2022 |
| Nisan International Ltd | Transport & logistics | 2019 |
| Nish-Nish Ltd | Real estate | 2023 |
| Nishan Construction Ltd | Construction | 2026 |
| Nitelux Limited | Wholesale & retail | 2016 |
| Nittyaa International Ltd | Wholesale & retail | 2020 |
| Nittyaa Property Management Limited | Real estate | 2022 |
| Nittyaa Trading Ltd | Wholesale & retail | 2023 |
| Nizami Capital Ltd | Real estate | 2019 |
| Njoy Consulting Limited | Information & communication | 2020 |
| NM Prive Ltd | Wholesale & retail | 2025 |
| NNN Property Services Ltd | Construction | 2026 |
| NNS Brow Beauty Services Limited | Other services | 2024 |
| NO Victims Live Here Ltd | Professional & scientific | 2025 |
| Nobiani Ltd | Hospitality | 2026 |
| Nodal Cloud Limited | Information & communication | 2024 |
| Nodove Care Limited | Health & social care | 2023 |
| Noiraenoir Ltd | Arts & recreation | 2025 |
| Nolan Glass Limited | Manufacturing | 1976 |
| Nollywood Film Club Ltd | Information & communication | 2024 |
| Nonatec (Europe) Limited | Health & social care | 2009 |
| Nonstop World (Tandemworld) Limited | Information & communication | 2007 |
| Norman Court Freehold Limited | Households | 2022 |
| Nosehri Welfare Limited | Financial services | 2024 |
| NOT Just Plumbers Ltd | Construction | 2017 |
| Notting Hill Copyrights Limited | Other services | 1998 |
| Nourish+D Ltd | Hospitality | 2026 |
| Novo Dent Ltd | Manufacturing | 2025 |
| Novo Disk Ltd | Manufacturing | 2025 |
| Nowbuth Limited | Real estate | 2025 |
| NP Windows & Construction Ltd | Manufacturing | 2025 |
| NR Homes Limited | Construction | 2017 |
| NTA Healthcare Ltd | Health & social care | 2018 |
| Numaonline Ltd | Wholesale & retail | 2007 |
| Numdor Apartments UK Ltd | Real estate | 2025 |