| Mayfield Restaurant Ltd | Hospitality | 2026 |
| Mayokun's Memos Ltd | Information & communication | 2025 |
| Mayowa Care Services Ltd | Public administration | 2019 |
| MC Education Group Limited | Education | 2022 |
| MC Logistic Transport Ltd | Transport & logistics | 2025 |
| MC Maintenance Works Ltd | Construction | 2024 |
| MCC Admin Limited | Administrative & support | 2005 |
| MCL Mechanical Ltd | Construction | 2019 |
| MD Cons Ltd | Construction | 2022 |
| Mdaa Ltd | Professional & scientific | 2024 |
| Medina KM Ltd | Health & social care | 2022 |
| Meej Healthcare Services Ltd | Health & social care | 2024 |
| Mega Direct U.K. Ltd | Administrative & support | 2016 |
| Meica Engineering Services Limited | Water & waste | 2024 |
| Merit Financial Solution Limited | Financial services | 2025 |
| Metrozap Ltd | Professional & scientific | 2026 |
| Micade Ltd | Transport & logistics | 2019 |
| Mida Maintenance Services Ltd | Construction | 2017 |
| Mide Made Ltd | Wholesale & retail | 2024 |
| Mifadelo Global Religion Law and Health Found Ltd | Professional & scientific | 2018 |
| Mike Caton Psychotherapy Ltd | Health & social care | 2026 |
| Mike Romeo & Delta Ltd | Administrative & support | 2019 |
| Mikeomoniyi.Com Ltd | Other services | 2025 |
| Milovanovic Ltd | Transport & logistics | 2024 |
| Mira & LEO Limited | Manufacturing | 2022 |
| Miraco Limited | Wholesale & retail | 2013 |
| Mirox Ltd | Information & communication | 2026 |
| Mithai Foods Ltd | Hospitality | 2024 |
| MIU Aquatics Limited | Agriculture & fishing | 2022 |
| MIU Industries Limited | Information & communication | 2023 |
| MJ European Food Ltd | Wholesale & retail | 2024 |
| MK Medicals (UK) Ltd | Wholesale & retail | 2013 |
| MKS Builders Ltd | Construction | 2024 |
| Mmit Cleaning Services Ltd | Administrative & support | 2023 |
| Moaj Investment Properties Limited | Construction | 2023 |
| Moakin Ltd | Real estate | 2022 |
| Mobi.Officials Ltd | Other services | 2025 |
| Mocollares Limited | Manufacturing | 2025 |
| Mohan Singh Bindra Ltd | Construction | 2021 |
| MOK Jagaban HSL Limited | Other services | 2025 |
| Mokass Ltd | Administrative & support | 2014 |
| Monolith Drylining Limited | Construction | 2013 |
| Monsol Global Concepts Ltd | Health & social care | 2013 |
| Moore & Sons Property Group Ltd | Construction | 2024 |
| More GAJ Resources Limited | Construction | 2017 |
| Moriah Care Services Ltd | Administrative & support | 2022 |
| Morphou Ltd | Hospitality | 2025 |
| Moses Basket Ltd | Health & social care | 2010 |
| Mowlak Ltd | Real estate | 2021 |
| MS Appliances and Spares Ltd | Wholesale & retail | 2020 |
| MS Group London Ltd | Construction | 2018 |
| MSL Global Education Ltd | Education | 2025 |
| MSM Plumbing and Heating Services Ltd | Construction | 2023 |
| Mupzz' Movements Ltd | Water & waste | 2025 |
| Murray-Lee-Mckenzie Ltd | Real estate | 2022 |
| Musban Limited | Construction | 2023 |
| My Baby Stage Ltd | Other services | 2021 |
| My Skate Pro App Limited | Wholesale & retail | 2017 |
| Mykyta S. Engineering Limited | Manufacturing | 2026 |
| N R Lyoa Properties Ltd | Real estate | 2022 |
| N0.1 Foodcenta Ltd | Wholesale & retail | 2024 |
| Nailsa Ltd | Wholesale & retail | 2026 |
| Namar Solutions Ltd | Real estate | 2025 |
| Namo Bakes Limited | Manufacturing | 2025 |
| Naseerah London Ltd | Information & communication | 2023 |
| Natalie Okri Limited | Information & communication | 2025 |
| Natine Limited | Information & communication | 2017 |
| Nations Relocation Ltd | Hospitality | 2022 |
| Natnao Ltd | Information & communication | 2018 |
| Nekky's Properties Ltd | Real estate | 2026 |
| Neneglobal Ltd | Health & social care | 2026 |
| Network Alloy Limited | Wholesale & retail | 2025 |
| Network Group Limited | Professional & scientific | 2025 |
| Network Tyre & Auto Limited | Wholesale & retail | 2008 |
| New Dawn 'N' Sunrise Limited | Extraterritorial | 2007 |
| New GEN Finance Ltd. | Information & communication | 2026 |
| New Light Estates Ltd | Real estate | 2022 |
| New Root of Spice Ltd | Hospitality | 2025 |
| News International Security Company Limited | Administrative & support | 2015 |
| Nexmin Limited | Wholesale & retail | 2022 |
| NG Network Consultancy Ltd | Information & communication | 2009 |
| Nickolea Ltd | Transport & logistics | 2019 |
| Nicolasbest Ltd | Transport & logistics | 2025 |
| NII Construction Ltd | Construction | 2020 |
| Nikhil Riya Enterprises Ltd | Real estate | 2024 |
| Nimble Consult CIC | Professional & scientific | 2025 |
| Nirmal Developments Ltd | Real estate | 2018 |
| NJ Building Services Ltd | Construction | 2005 |
| NO.1 Security & Technology Ltd | Administrative & support | 2012 |
| Norkade (UK) Limited | Construction | 2011 |
| Norkus Limited | Transport & logistics | 2019 |
| North Kent Asbestos Services Limited | Construction | 2011 |
| Novo Payroll Limited | Professional & scientific | 2016 |
| NP Property Box Limited | Real estate | 2017 |
| NSA Trans Limited | Transport & logistics | 2021 |
| Nurja Plumbing and Heating Ltd | Construction | 2024 |
| Nyati Private Limited | Health & social care | 2019 |
| Oak Mount Developments Ltd | Construction | 2015 |
| Oak Worth Brickwork Ltd | Construction | 2024 |
| Oakwyn Global Ltd | Professional & scientific | 2025 |