| Meixter Ltd | Education | 2020 |
| Mezzet on the Move Ltd | Hospitality | 2022 |
| MHM3012 Ltd | Other services | 2024 |
| Michael Clements Limited | Transport & logistics | 2025 |
| Midas GST Limited | Transport & logistics | 2017 |
| Middle Child Beer Ltd | Wholesale & retail | 2023 |
| Middle Child Brewing Limited | Manufacturing | 2020 |
| Mikael Engineering Limited | Professional & scientific | 2025 |
| Miller and Sons Fencing Ltd | Construction | 2024 |
| Mind Your Health International Ltd | Education | 2022 |
| Mind Your Health Ltd | Education | 2018 |
| Ministry of Experience Ltd | Professional & scientific | 2006 |
| Minnie Events Limited | Hospitality | 2026 |
| MK 1 Media Ltd | Information & communication | 2007 |
| MK Dentamed Limited | Wholesale & retail | 2020 |
| Mnel Ltd | Information & communication | 2011 |
| Mobisystems Ltd | Administrative & support | 2007 |
| Mojo & Goliath Ltd | Administrative & support | 2025 |
| Molember Events Limited | Professional & scientific | 2014 |
| Molesey Autocare Ltd | Wholesale & retail | 2026 |
| Molesey Barbers Ltd | Other services | 2018 |
| Molesey Enquirer Ltd | Information & communication | 2025 |
| Molesey Fencing Limited | Construction | 2018 |
| Molesey Metal Works Limited | Manufacturing | 1958 |
| Molesey Property Maintenance Ltd | Construction | 2021 |
| Monaco Events Ltd | Administrative & support | 2005 |
| Monochrome Minds Ltd | Information & communication | 2014 |
| Monroe Services Ltd | Administrative & support | 2018 |
| Monza Motor Group Ltd | Wholesale & retail | 2026 |
| Monza Trading Ltd | Wholesale & retail | 2006 |
| Moomenn Ltd | Professional & scientific | 2018 |
| Motion Perfect Mobility Ltd | Wholesale & retail | 2019 |
| Motus-Gyms Ltd | Arts & recreation | 2024 |
| MR Frosty Ltd | Manufacturing | 2022 |
| MRG Plumbing & Heating Limited | Construction | 2012 |
| MS Electric Ltd | Construction | 2022 |
| Mu-Kau Limited | Information & communication | 2004 |
| Mugosa Limited | Agriculture & fishing | 2011 |
| Multitiers Solutions Ltd | Wholesale & retail | 2016 |
| Mumagi Ltd | Professional & scientific | 2020 |
| Mvasilev Ltd | Transport & logistics | 2015 |
| Mwsb Ltd | Professional & scientific | 2025 |
| My Jhair Ltd | Other services | 2009 |
| My Lemon Tree Ltd | Hospitality | 2019 |
| Mystery Kits Ltd | Wholesale & retail | 2021 |
| N Motors Ltd | Wholesale & retail | 2025 |
| N&S Construction Limited | Construction | 2021 |
| Nationwide Car Transport Limited | Transport & logistics | 2014 |
| ND Packaging Solutions Ltd | Administrative & support | 2023 |
| Neil Wells Plastering and Building Services Limited | Construction | 2009 |
| Neils Wheels Limited | Manufacturing | 2011 |
| New Horizons Aviation Limited | Administrative & support | 2022 |
| Nexel Capital Limited | Real estate | 2011 |
| Nexrise Management Ltd | Professional & scientific | 2025 |
| Nextit-Era Limited | Manufacturing | 2025 |
| Nextstage Entertainment Ltd | Professional & scientific | 2025 |
| NH Cargo Solutions Limited | Transport & logistics | 2018 |
| Nigel Lowe Limited | Construction | 1998 |
| Nighthawk Sports Ltd | Wholesale & retail | 2023 |
| Nikiviki Hill Ltd | Construction | 2023 |
| NO Plan B Limited | Administrative & support | 2015 |
| Nolands UK Limited | Administrative & support | 2016 |
| Nonstop Facilities Ltd | Information & communication | 2023 |
| Northedge Advisory Ltd | Information & communication | 2026 |
| NOT in the Headlines Ltd | Information & communication | 2025 |
| NPN Ventures Limited | Information & communication | 2025 |
| OB Painting & DECORATING1 Ltd | Construction | 2025 |
| Ocean Investments (Properties) Limited | Health & social care | 2007 |
| Octople Ltd | Information & communication | 2025 |
| Offlink Marketing Ltd | Professional & scientific | 2023 |
| OIL and GAS Energy Consultants Limited | Professional & scientific | 2012 |
| OMK Electrics Ltd | Manufacturing | 2023 |
| Omni Electrical Services Ltd | Construction | 2022 |
| Only YOU Publishing Limited | Information & communication | 2019 |
| Open Space Vision Ltd | Arts & recreation | 2020 |
| Organamix Limited | Manufacturing | 2025 |
| Orpheus Dental Ltd | Health & social care | 2017 |
| Orreaga Consulting Ltd | Professional & scientific | 2022 |
| Otvaga Ltd | Construction | 2022 |
| OUR Hope Care Limited | Health & social care | 2015 |
| P Stonor Limited | Administrative & support | 2016 |
| P&H Building Ltd | Construction | 2015 |
| Palindrome Limited | Real estate | 2022 |
| Pantheon Sports Limited | Real estate | 1996 |
| Park View Care Ltd | Health & social care | 2026 |
| Park View Care Property Ltd | Health & social care | 2026 |
| PAT Pending Ltd | Wholesale & retail | 2022 |
| Patronus Limited | Information & communication | 2008 |
| Pattern Collective Limited | Administrative & support | 2012 |
| Patty and Punch Ltd | Hospitality | 2024 |
| Penny Simmonite Counselling Limited | Health & social care | 2019 |
| Peony & Jones Ltd | Administrative & support | 2017 |
| PEP Farley Ltd | Administrative & support | 2016 |
| Perfect Pair Partnerships Ltd | Professional & scientific | 2017 |
| Performance Marketeers Limited | Information & communication | 2003 |
| Permitted Developments Limited | Construction | 2017 |
| Phoenix Harcourt-Smith Ltd. | Manufacturing | 2001 |
| Pinkney Dynamics Consulting Limited | Professional & scientific | 2020 |
| PIO Neos Holding Limited | Manufacturing | 2022 |
| Pioneer Lifting Solutions Ltd | Professional & scientific | 2018 |