| Martin Poole Photography Limited | Professional & scientific | 2025 |
| Mazal Media Ltd | Professional & scientific | 2021 |
| Mber Designs Limited | Other services | 2009 |
| MDN Building Contractors Limited | Construction | 2006 |
| Media Travel Management Limited | Administrative & support | 2015 |
| Medway Premier Block Management Ltd | Real estate | 2019 |
| Mercury Design Limited | Wholesale & retail | 2000 |
| Mesoteric Ventures Limited | Financial services | 2023 |
| Mike Pons Limited | Real estate | 2016 |
| MJ Shirley Trading LLP | | 2009 |
| Mkwj Investments Ltd | Financial services | 2022 |
| MLD Group Holdings Limited | Financial services | 2026 |
| MNS Confidential Ltd | Financial services | 2026 |
| Montpelier ROW LLP | | 2024 |
| Mototechnique Limited | Manufacturing | 1980 |
| Mphp London Limited | Arts & recreation | 2024 |
| MPI Financial Services Ltd. | Financial services | 1997 |
| MPI FS LLP | | 2010 |
| MS Anderson Properties LLP | | 2011 |
| MTA Cabling Limited | Construction | 2022 |
| Mulberry Edge Limited | Professional & scientific | 2026 |
| Mural:Fx Limited | Construction | 2018 |
| MW Building Services London Ltd | Professional & scientific | 2018 |
| Natasha Jayne Property Management Ltd | Other services | 2020 |
| NAU Consultancy Ltd | Professional & scientific | 2020 |
| Nayex Limited | Administrative & support | 2019 |
| Nepicar Lodge Management Company Limited | Extraterritorial | 2006 |
| New Wave Academy Bromley Limited | Arts & recreation | 2022 |
| New Wave Academy Limited | Arts & recreation | 2014 |
| New World Media Services Limited | Information & communication | 2000 |
| Nexus Land Group Ltd | Professional & scientific | 2017 |
| Nexus Personnel Ltd | Administrative & support | 2014 |
| Nimtim Architects Ltd | Professional & scientific | 2014 |
| North West Dermatology Vets Ltd | Professional & scientific | 2026 |
| Northridge Developments Ltd | Professional & scientific | 2023 |
| Northstar Wealth Limited | Financial services | 2025 |
| Note Partnership Ltd | Financial services | 2023 |
| Novo Fixings Ltd | Wholesale & retail | 2023 |
| NWA SE20 Ltd | Arts & recreation | 2025 |
| Oak Traffic Management Ltd | Administrative & support | 2022 |
| Oakhill Builders Ltd | Administrative & support | 2017 |
| Olivers Mill Cleaning and Maintenance LLP | | 2008 |
| Olivers Mill Contract Cleaning Services Limited | Administrative & support | 1999 |
| Olivers Mill Partners LLP | | 2012 |
| Olivers Mill Property LLP | | 2007 |
| Onnea | Administrative & support | 2012 |
| Onnisoft Ltd | Administrative & support | 2013 |
| Organic Growth London Limited | Administrative & support | 2012 |
| Osmax Ltd | Real estate | 2014 |
| Osprey Finish Limited | Manufacturing | 1990 |
| OTS Capital Limited | Financial services | 2026 |
| OX1 Holdings Ltd | Financial services | 2023 |
| Oxygene Group Ltd | Information & communication | 2024 |
| Oxygene Property Ltd | Real estate | 2020 |
| P J Wright & Sons Fireplace Shop Limited | Construction | 2026 |
| Parable Marketing Limited | Administrative & support | 2011 |
| Paul Cross Limited | Other services | 2010 |
| Paul Vallance Associates Limited | Information & communication | 2014 |
| Pavey Electricals Ltd | Construction | 2016 |
| Payton Holdings Ltd | Professional & scientific | 2016 |
| Phil Copper Services Limited | Other services | 2007 |
| Phoenix Education Consultancy Limited | Education | 2018 |
| PL Business Development Limited | Professional & scientific | 2017 |
| Planwell Recruitment Ltd | Administrative & support | 2011 |
| Planwell Staff Hire Ltd | Administrative & support | 2014 |
| PMJ Invest Limited | Real estate | 2015 |
| Pmlm Ltd | Construction | 2024 |
| POINT8 Coaching Limited | Financial services | 2025 |
| Poolside Entrepreneur Limited | Information & communication | 2015 |
| Portland Road LLP | | 2014 |
| Premier Property and Construction Limited | Construction | 2014 |
| Prime Estates UK Limited | Real estate | 2009 |
| Primo Algorithmic Limited | Financial services | 2026 |
| Principal Colour Limited | Manufacturing | 1996 |
| Purple Patch Consultancy Limited | Professional & scientific | 2008 |
| Pwcom.Co.Uk Limited | Information & communication | 2000 |
| Qassa Limited | Administrative & support | 2007 |
| Quay Installations Limited | Construction | 2019 |
| R & R Tooling Ltd | Wholesale & retail | 2010 |
| R Cook and SON Construction Limited | Construction | 2015 |
| Radia Ventures Limited | Other services | 1992 |
| Rainey Days Limited | Financial services | 2023 |
| Rcka Limited | Professional & scientific | 2006 |
| Rdzl Limited | Professional & scientific | 2021 |
| RE: Think Property Consultancy Limited | Professional & scientific | 2018 |
| RE: Think Property Investments Limited | Real estate | 2024 |
| Redmire Ltd | Other services | 2020 |
| Reezu Ltd | Professional & scientific | 2024 |
| Reezu Property Ltd | Real estate | 2024 |
| Richard Marshall Investments LLP | | 2007 |
| Rightguard Capital Limited | Administrative & support | 2024 |
| Robgow Limited | Real estate | 2018 |
| ROC Boxx Ltd | Arts & recreation | 2025 |
| Rochford Veterinary Limited | Professional & scientific | 2021 |
| Roman RAJ Ltd | Financial services | 2017 |
| Royston Bioindustries Limited | Information & communication | 2024 |
| Runo Sales and Lettings Ltd | Real estate | 2026 |
| Russell House LLP | | 2007 |
| Ryco Asset Holdings Ltd | Financial services | 2026 |
| Ryco Holdings Ltd | Professional & scientific | 2023 |