| Merwood & Bridley Ltd | Professional & scientific | 2026 |
| Mewies Limited | Wholesale & retail | 2008 |
| Mfps Property Services Limited | Professional & scientific | 2018 |
| Michelle Vernon Limited | Other services | 2014 |
| Mission Evolve Limited | Information & communication | 2022 |
| MJS & MSS Consultancy Ltd | Professional & scientific | 2025 |
| Mmhar Ltd | Public administration | 2024 |
| Mojocom Systems Limited | Information & communication | 1988 |
| Morewell Ltd | Extraterritorial | 2020 |
| MPC Auto Repair Ltd | Wholesale & retail | 2025 |
| MSP Investment Properties Limited | Real estate | 2024 |
| Mulmania Ltd | Manufacturing | 2024 |
| Mustang Hygiene Limited | Wholesale & retail | 1997 |
| N G Surveys Ltd | Professional & scientific | 2006 |
| Nanta Partners Ltd | Professional & scientific | 2026 |
| Nasaic Ltd | Construction | 2021 |
| NAZ Ventures Limited | Wholesale & retail | 2026 |
| Neem Tree Care Limited | Health & social care | 2010 |
| Neem Tree Holdings Limited | Health & social care | 2024 |
| Neon Legacy Agency Ltd | Professional & scientific | 2026 |
| Nesol Consultants Ltd | Professional & scientific | 2015 |
| Newman Freehold Ltd | Construction | 2025 |
| Newtravco Management Services Limited | Professional & scientific | 2026 |
| Niall Maguire Limited | Financial services | 2009 |
| Nine Acres Property LLP | | 2015 |
| NIO Antiques (UK) Limited | Wholesale & retail | 2025 |
| Nippertime Preschool Limited | Education | 2003 |
| NKR Consulting Ltd | Information & communication | 2015 |
| NKR Freeholds Limited | Real estate | 2003 |
| NO 1 Plumbing Company Limited | Construction | 2015 |
| Norwood Aquarium Limited | Wholesale & retail | 1975 |
| Nouveau Group Limited | Manufacturing | 2022 |
| Novtone Limited | Construction | 2026 |
| NTL Management Limited | Real estate | 2018 |
| O'Grady Building & Decorating Contractors Ltd | Construction | 2019 |
| Oakley BIM Solutions Ltd | Administrative & support | 2022 |
| Obsidian AI Advisors Limited | Professional & scientific | 2010 |
| Occupational Health Contracts Ltd | Health & social care | 2022 |
| Ocus Group Ltd | Manufacturing | 2023 |
| OG NO.1 Limited | Administrative & support | 2024 |
| OGG Ltd | Professional & scientific | 2023 |
| Oliver Gray Racing Limited | Arts & recreation | 2021 |
| Onward Life Ltd | Hospitality | 2023 |
| Optimiste.Ai Services Ltd | Information & communication | 2024 |
| Oshun Spa London Ltd | Other services | 2025 |
| Osprey Wealth Management Limited | Financial services | 2020 |
| Owen Projects Limited | Professional & scientific | 2023 |
| Own Gold Global Ltd | Administrative & support | 2022 |
| Own Gold Mint Limited | Manufacturing | 2024 |
| Own Gold NO.1 Limited | Administrative & support | 2023 |
| Oxshott Cars Ltd | Transport & logistics | 2014 |
| P. Johnson & SON (1976) Limited | Water & waste | 1976 |
| Pallaton Security Collective Limited | Administrative & support | 2022 |
| Paragon Trading Partners LLP | | 2009 |
| Parkside Automotive Ltd | Wholesale & retail | 2026 |
| Parmenter Builders Limited | Construction | 1992 |
| Parmenter Holdings Limited | Real estate | 2023 |
| Pat's Paws Dog Day Care Ltd | Other services | 2013 |
| Pat's Paws Dog Training Ltd | Other services | 2019 |
| Pathway Skills Academy Ltd | Education | 2025 |
| Paul the Plumber Limited | Construction | 2020 |
| Paul Thorn and Associates Limited | Construction | 2015 |
| Peak Property Partners HK Limited | Real estate | 2025 |
| Peakwave Ltd | Information & communication | 2026 |
| Penfolds MAN and Van Ltd | Transport & logistics | 2024 |
| Perspective Roofing Ltd. | Construction | 2020 |
| Pets on the Green Ltd | Agriculture & fishing | 2025 |
| PFS Consultants Limited | Professional & scientific | 2013 |
| Phenom Digital Limited | Professional & scientific | 2019 |
| Phillips Inc Ltd | Extraterritorial | 2023 |
| Phoebus Consulting Limited | Professional & scientific | 2018 |
| PJ Property Hub Ltd | Real estate | 2026 |
| Pjrs Properties Ltd | Real estate | 2026 |
| Planned Electrical Services Ltd | Professional & scientific | 2018 |
| Platform Factory Ltd | Information & communication | 2001 |
| Platinum Tax & Accountancy Ltd | Professional & scientific | 2023 |
| Platinum Tax & M.T.D. Services Ltd | Professional & scientific | 2025 |
| Plumbing Functions Limited | Construction | 2009 |
| PNN Assets Limited | Real estate | 2010 |
| Polta Productions Ltd | Administrative & support | 2026 |
| Portico Rentals Limited | Real estate | 2020 |
| Prem Air Ventilation Ltd | Construction | 2014 |
| Prestige Coins Limited | Professional & scientific | 2021 |
| Priydent Limited | Health & social care | 2022 |
| Professional Support 4 U Limited | Professional & scientific | 2010 |
| Projema Projects Ltd | Construction | 2016 |
| PTP Property Solutions Ltd | Households | 2025 |
| Purley Garage Ltd | Wholesale & retail | 2021 |
| Purslane & Intl Limited | Real estate | 2021 |
| PWM Project Management Services Limited | Information & communication | 2014 |
| Quality Development Property Ltd | Construction | 2016 |
| Quggy Ltd | Wholesale & retail | 2023 |
| R Bullen Autos Ltd | Wholesale & retail | 2023 |
| R&Re Ltd | Construction | 2020 |
| R-Evolution Within Ltd | Health & social care | 2021 |
| Radia & Co Accountants Ltd | Professional & scientific | 2015 |
| Rainbow Residential Limited | Real estate | 2024 |
| Randburg Building Services Limited | Construction | 2006 |
| Randburg Electrical Services Limited | Construction | 2005 |
| Randburg Specialist Services Ltd | Construction | 2019 |