| Magnum Enterprises (Surrey) Limited | Manufacturing | 2006 |
| Maison Marguerite Ltd | Professional & scientific | 2025 |
| Manwood Property Limited | Real estate | 2017 |
| MAP Aviation Ltd | Transport & logistics | 2021 |
| Markham Homes Ltd | Construction | 2019 |
| Markoni Kola Ltd | Information & communication | 2023 |
| Marlborough Homes Southern Limited | Construction | 2014 |
| Martin and Co Decorating and Renovations Ltd | Construction | 2018 |
| Martin Thomson Limited | Manufacturing | 2011 |
| Masala Moment Limited | Hospitality | 2024 |
| Matthew Radley & Associates Limited | Professional & scientific | 2011 |
| Maximum Performances (UK) Limited | Arts & recreation | 2008 |
| Maywal Limited | Wholesale & retail | 1995 |
| Maywal Trading Limited | Wholesale & retail | 1988 |
| Mbramb Services Limited | Administrative & support | 2014 |
| MC Consultancy & Accountancy Ltd | Professional & scientific | 2018 |
| Mcclelland Networking Consulting Ltd | Information & communication | 2006 |
| Mcecocleaning Ltd | Administrative & support | 2022 |
| Mcharris Properties Limited | Real estate | 2017 |
| Mcintyres Maintenance Ltd | Administrative & support | 2023 |
| Measham Property Management Ltd. | Real estate | 1997 |
| Meba Developments Limited | Construction | 2017 |
| Megis Health Limited | Health & social care | 2012 |
| Mel's Health & Beauty Services Ltd | Health & social care | 2025 |
| Melas Composites Ltd | Manufacturing | 2024 |
| Merlin Inns Limited | Hospitality | 1987 |
| Merrow Internet Services Limited | Information & communication | 2001 |
| MES (Surrey) Limited | Wholesale & retail | 2011 |
| MES Group Limited | Professional & scientific | 2019 |
| MHH International Ltd. | Wholesale & retail | 2013 |
| Mica Media Limited | Wholesale & retail | 2015 |
| Micha Kelly Fitness Ltd | Arts & recreation | 2020 |
| Milestones Building Limited | Construction | 2014 |
| Millars Cottages Management Company Limited | Real estate | 2014 |
| Milock Group Limited | Financial services | 2023 |
| Minibig Studios Ltd | Professional & scientific | 2025 |
| Mise Services Ltd | Information & communication | 2025 |
| MK Sports Consultancy Ltd | Other services | 2017 |
| Moatcroft Properties Ltd | Real estate | 2024 |
| MOD Music Limited | Information & communication | 2014 |
| Modern Reflexology Academy Limited | Education | 2021 |
| Modge Property Ltd | Real estate | 2026 |
| Monarch Studios Limited | Administrative & support | 2013 |
| Monrise Limited | Construction | 2021 |
| Mooselet Limited | Real estate | 1999 |
| Morris House (Tadworth) Management Company Limited | Households | 2016 |
| Moss Pharma Solutions Limited | Professional & scientific | 2019 |
| Mousehill Ltd | Real estate | 2017 |
| Moyo & Mcateer Consulting Engineers Ltd | Professional & scientific | 2021 |
| MP Academy Limited | Arts & recreation | 2014 |
| MP Pro Limited | Arts & recreation | 2014 |
| MS3G Limited | Arts & recreation | 2024 |
| MTL Associates Limited | Administrative & support | 2018 |
| Mwali JAH Services Ltd | Wholesale & retail | 2017 |
| MWL International Limited | Professional & scientific | 1999 |
| My-Pro Limited | Information & communication | 2009 |
| Mymoneyman Limited | Financial services | 2010 |
| N & N 99 Ltd | Transport & logistics | 2025 |
| N & R Humphrey Ltd | Real estate | 2020 |
| N Giles Limited | Real estate | 2005 |
| N Minus One Ltd | Professional & scientific | 2024 |
| N R Barnes Ltd | Construction | 2019 |
| N&S Cook Property Ltd | Real estate | 2024 |
| Nana Asiedu Limited | Health & social care | 2021 |
| Natasha Lucas Limited | Professional & scientific | 2020 |
| Natural Grace Limited | Wholesale & retail | 2019 |
| Natural Light Holistic Wellness Clinic Ltd | Health & social care | 2021 |
| Navski Limited | Professional & scientific | 2016 |
| NBA Automotive Limited | Wholesale & retail | 2012 |
| NCD Electrical Services Ltd | Construction | 2025 |
| NCD Smoke Vent Solutions Ltd | Construction | 2025 |
| Needl Analytics Limited | Information & communication | 2016 |
| Nelson and SON Ltd | Construction | 2024 |
| NET Admins Limited | Information & communication | 2005 |
| Nettle Works Limited | Wholesale & retail | 2025 |
| New Court Residents Freeholding Limited | Households | 2018 |
| New Day Sensory Shop Ltd | Wholesale & retail | 2023 |
| New Skills Academy CIC | Education | 2024 |
| New York Nails Cranleigh Ltd | Other services | 2025 |
| Newbridge Court Management Company Limited | Households | 1983 |
| Newlifeco Ltd | Wholesale & retail | 2026 |
| Next Vehicles Ltd | Financial services | 2004 |
| Nicholas Scott Lateral Lawyer Hires Ltd | Administrative & support | 2023 |
| Nick Padmore Racing Ltd | Arts & recreation | 2018 |
| Nicky Bishop Consulting Limited | Professional & scientific | 2013 |
| Nightingale Service Centre Limited | Wholesale & retail | 2004 |
| Nine LUX Limited | Information & communication | 2014 |
| Nine Oaks Investments Limited | Real estate | 2021 |
| Ninja Details Ltd | Manufacturing | 2025 |
| NJE Garner and SON Limited | Information & communication | 2008 |
| NK Enhanced Ltd | Professional & scientific | 2019 |
| NO.5 - a Strategic Marketing Consultancy Ltd | Professional & scientific | 2024 |
| Noah Watts Art LLP | | 2026 |
| NON Disclosure Agreement Ltd | Professional & scientific | 2021 |
| Novus Curate & Build Limited | Construction | 2022 |
| Nowu-Dent Ltd | Health & social care | 2019 |
| NR Interests Limited | Arts & recreation | 2013 |
| Nsxuk Ltd | Wholesale & retail | 2019 |
| NT Advisors 2009 LLP | | 2005 |
| NT Advisors Limited | Professional & scientific | 2004 |