| Mova Property Limited | Real estate | 2016 |
| Move Home Loans Limited | Financial services | 2016 |
| MP Accounting Limited | Professional & scientific | 1990 |
| MPG Electrical Ltd | Construction | 2021 |
| MR Lawn Limited | Administrative & support | 2020 |
| Mrmd (London) Limited | Professional & scientific | 2010 |
| MSA Associates Ltd | Professional & scientific | 1997 |
| MSJ Safety Services Ltd | Public administration | 2019 |
| MTW Consultancy Limited | Health & social care | 2010 |
| MUD Kids Ltd | Other services | 2018 |
| Mulberry Mews (Reigate Hill) Residents Ltd | Households | 2014 |
| Mullai Properties Ltd | Real estate | 2016 |
| Muller Consultancy Ltd | Professional & scientific | 2013 |
| Mullins Court Freehold Limited | Real estate | 2017 |
| Muscleiq Ltd | Extraterritorial | 2025 |
| Musiclore Limited | Professional & scientific | 1983 |
| Mvam Limited | Financial services | 2014 |
| Mwjs Services Ltd | Manufacturing | 2018 |
| Mxtmachines Ltd | Wholesale & retail | 2026 |
| My Ace Story CIC | Health & social care | 2023 |
| My Easl Limited | Arts & recreation | 2022 |
| My Service Check Limited | Wholesale & retail | 2012 |
| Mycrow Consulting Limited | Information & communication | 2007 |
| Myles Carpet & Flooring Ltd | Construction | 2015 |
| Mystique Management Limited | Professional & scientific | 2023 |
| Mywinespace Limited | Extraterritorial | 2008 |
| N & D Harlow Limited | Construction | 2019 |
| Naked Fitness Limited | Wholesale & retail | 2018 |
| Napoli on Wheels Reloaded Limited | Hospitality | 2021 |
| Naruca Designs Ltd | Professional & scientific | 2018 |
| NAS Information Systems Limited | Professional & scientific | 1993 |
| Nash Automotive Ltd | Wholesale & retail | 2021 |
| Nash Beverage Ingredients Limited | Wholesale & retail | 2021 |
| Natd Consultancy Ltd | Professional & scientific | 2023 |
| National Dental Plan Limited | Financial services | 1988 |
| Navigator Management Ltd | Professional & scientific | 2022 |
| NDM Consulting Limited | Professional & scientific | 2015 |
| Nebaz Limited | Real estate | 2019 |
| Nebula Ltd | Professional & scientific | 2025 |
| Neil Crawford Consulting Limited | Financial services | 2018 |
| Nelsons Insurance Services Limited | Financial services | 2009 |
| Netmc Estates Ltd | Real estate | 2014 |
| Netmc Limited | Professional & scientific | 1996 |
| Netmc Marine Limited | Manufacturing | 2000 |
| Neuman Aqua International Limited | Construction | 2013 |
| Neuman Aqua Limited | Construction | 2011 |
| Neural Insights Limited | Professional & scientific | 2002 |
| New Comodor Ltd | Hospitality | 2025 |
| New Hive Consultancy Limited | Professional & scientific | 2018 |
| New Hive Projects Limited | Information & communication | 2022 |
| New Life Church Dorking | Other services | 2011 |
| Newline South Ltd | Construction | 2009 |
| Newtex Investments Limited | Real estate | 2002 |
| Nexd Limited | Information & communication | 2017 |
| NIA Limited | Agriculture & fishing | 1995 |
| Nichols Plumbing & Heating Limited | Construction | 2023 |
| Nick Chapman Cars Limited | Wholesale & retail | 2014 |
| Nick Kenward Construction Limited | Construction | 2002 |
| Nick Russell Associates Ltd | Professional & scientific | 2011 |
| Nicola Heard Limited | Administrative & support | 2012 |
| Nicole Lodge RTM Company Limited | Households | 2023 |
| Nightingale House Redhill Limited | Households | 2012 |
| Nirvana Cycles Limited | Wholesale & retail | 2006 |
| Nirvana Cycles Surrey Ltd | Wholesale & retail | 2023 |
| Nirvanafrog Ltd | Professional & scientific | 2021 |
| Nivada Ltd | Construction | 2015 |
| Nixon's Nurturing Nature Limited | Administrative & support | 2024 |
| Njames Consulting Limited | Professional & scientific | 2017 |
| NL Installation Ltd | Construction | 2017 |
| Noah Marine Limited | Agriculture & fishing | 2022 |
| Noble House Management Ltd | Construction | 2011 |
| Nommer Limited | Professional & scientific | 2023 |
| Norfolk Finance Company Ltd | Households | 2025 |
| Norfolk Garage (Holmwood) Limited | Real estate | 1946 |
| Norfolk Mews Management Limited | Households | 1995 |
| Norprice Limited | Professional & scientific | 2012 |
| North Sea Natural Resources Ltd | Mining & quarrying | 2010 |
| North SF Limited | Financial services | 2024 |
| Northfield Parts Limited | Wholesale & retail | 2015 |
| Northlane Smile Studios Ltd | Health & social care | 2025 |
| Nova Mart RH4 Ltd | Wholesale & retail | 2025 |
| Novar Films Ltd | Information & communication | 2025 |
| Novus Business Connections Limited | Administrative & support | 2017 |
| Nower Close (Freehold) Limited | Households | 2011 |
| Nower Gate (Dorking) Management Company Limited | Households | 2012 |
| Nower Services Limited | Administrative & support | 2018 |
| NRHATEC1 Residents Company Limited | Households | 2000 |
| Nsnr Holding 1 Limited | Mining & quarrying | 2025 |
| NTB Property Renovation Ltd | Arts & recreation | 2023 |
| NUB Ltd | Information & communication | 2017 |
| Nude Designs LLP | | 2009 |
| Number SIX Dene Street Ltd | Other services | 2025 |
| Nutley Dean (Residents) Mgmt. Co. Ltd | Households | 2022 |
| Nuvovis Limited | Information & communication | 2011 |
| Nuyu Limited | Administrative & support | 2003 |
| NW Risk Solutions Limited | Financial services | 2021 |
| Nàdar Oak Ltd | Construction | 2021 |
| O'Reordan Building Contractors Limited | Construction | 1991 |
| Oak and Fallow Ltd | Professional & scientific | 2022 |
| Oak END (Beare Green) Management Company Limited | Households | 1986 |