| PULAN62 Ltd | Other services | 2018 |
| Punnayurcare Limited | Health & social care | 2026 |
| Pure Plant Evolution Ltd | Wholesale & retail | 2020 |
| Pure Renewables Solutions Ltd | Construction | 2025 |
| Pureedge Finance Limited | Professional & scientific | 2025 |
| Purple Cat Counselling Ltd | Health & social care | 2025 |
| Purple Chimney Ltd | Real estate | 2008 |
| Purple Dawn Ltd | Professional & scientific | 2022 |
| Push Cycles Limited | Wholesale & retail | 2009 |
| Putus Makes Ltd | Other services | 2022 |
| Puzzle IT Solutions Ltd | Information & communication | 2018 |
| PV Holdings Limited | Transport & logistics | 2015 |
| PVV Ltd | Information & communication | 2024 |
| Pwolikkum Limited | Information & communication | 2022 |
| PXL Carpets UK Limited | Administrative & support | 2004 |
| Pycon Limited | Households | 1997 |
| Pyramid North Limited | Arts & recreation | 2012 |
| Q5 Media Group Ltd | Professional & scientific | 2025 |
| Qainat Ltd | Real estate | 2024 |
| Qasem IT Consulting Ltd. | Information & communication | 2014 |
| QDL Investments Ltd | Real estate | 2025 |
| QIT Limited | Information & communication | 2003 |
| QJM Bioinformation Ltd. | Professional & scientific | 2016 |
| QNL Ltd | Information & communication | 2015 |
| Quaav System Limited | Information & communication | 2024 |
| Quality Consultancy & Property Management Ltd | Households | 2025 |
| Quantonomy Limited | Information & communication | 2017 |
| Quantum Dynamix Ltd | Real estate | 2018 |
| Quarterpie Consulting Ltd | Information & communication | 2022 |
| Quatech Limited | Information & communication | 2017 |
| Queensferry Studios Limited | Professional & scientific | 2020 |
| Queensway Indian Ltd | Hospitality | 2026 |
| Queenwood Capital Management Ltd | Real estate | 2016 |
| Quibid Limited | Hospitality | 2023 |
| Quick Cartz Ltd | Wholesale & retail | 2025 |
| Quick Junk Ltd | Water & waste | 2021 |
| Quill Creativity Ltd | Arts & recreation | 2019 |
| Quin Technologies Limited | Information & communication | 2022 |
| Quincy Serivces Ltd | Health & social care | 2015 |
| Quintbridge Limited | Real estate | 2026 |
| Quitumbe Limited | Real estate | 2025 |
| Qureshiedu Ltd | Other services | 2018 |
| R & D Property (SE) Limited | Real estate | 2022 |
| R & L Commercial Limited | Real estate | 2016 |
| R & L MAY Group Limited | Financial services | 2026 |
| R & L MAY Holdings Ltd | Financial services | 2016 |
| R & L Residential Limited | Real estate | 2016 |
| R & R Mobile Mechanics and MOT Ltd | Wholesale & retail | 2025 |
| R & R Webster Ltd | Transport & logistics | 2022 |
| R & U Management Ltd | Professional & scientific | 2009 |
| R D Building Contracts Ltd | Construction | 2011 |
| R E Planning Limited | Extraterritorial | 2004 |
| R J Flynn Limited | Professional & scientific | 2013 |
| R J Seal Ltd | Manufacturing | 2022 |
| R Pelling Services Ltd | Construction | 2012 |
| R S Property Services Bromley Ltd | Construction | 2012 |
| R Vision Limited | Real estate | 2021 |
| R&L Services London Ltd | Professional & scientific | 2023 |
| R. Reynaert (ETN) Ltd. | Professional & scientific | 2014 |
| R. Storey & SON Limited | Other services | 2014 |
| R.A.M. Leisure Ltd. | Hospitality | 2017 |
| R.J.R. Associates Limited | Professional & scientific | 2014 |
| R.T.L Group Contracting Limited | Administrative & support | 2021 |
| R.T.L Group Ltd | Administrative & support | 2018 |
| Racehaus Ltd | Wholesale & retail | 2025 |
| Rachel ANN Design Ltd | Information & communication | 2016 |
| Rackk Investments Ltd | Real estate | 2005 |
| Radev Services Ltd | Construction | 2015 |
| Radial Engineering Ltd. | Professional & scientific | 2000 |
| Radius Consultancy Ltd. | Administrative & support | 2011 |
| Radius Services Limited | Financial services | 2023 |
| Radix TDO Ltd | Hospitality | 2023 |
| Radz Property Mgmt Ltd | Households | 2020 |
| Radzproperties Ltd | Real estate | 2022 |
| RAE Property Rentals Limited | Households | 2025 |
| Raeve Construction Limited | Construction | 2023 |
| Rafenza Ltd | Real estate | 2018 |
| Raffad Limited | Health & social care | 2023 |
| Rafias Creative Ltd | Professional & scientific | 2022 |
| Rahman Reserve Ltd | Real estate | 2023 |
| RAI Care Ltd | Administrative & support | 2025 |
| Rainbow Office Supplies Limited | Wholesale & retail | 1999 |
| Raise the Roofs London Limited | Construction | 2024 |
| Rajindra Properties Ltd | Real estate | 2017 |
| Ramarch Limited | Information & communication | 2010 |
| Ramblers Rest 1684 Limited | Administrative & support | 2023 |
| Ramblers Rest of Chislehurst Ltd | Other services | 2013 |
| Ramp Productions Ltd | Information & communication | 2013 |
| Ramsay Global Trading Ltd | Wholesale & retail | 2025 |
| Ramsdales Surveyors Ltd | Administrative & support | 2008 |
| Ramsden Tandoori Orpington Ltd | Hospitality | 2025 |
| Ramsey Optics Ltd | Health & social care | 2017 |
| RAN Ice Capital Ltd | Real estate | 2024 |
| Randalls Road Land Limited | Real estate | 2014 |
| Randhawa Design & Build Ltd | Construction | 2021 |
| Ranks Medical Services Limited | Health & social care | 2016 |
| Raphael Centre Property Development Limited | Real estate | 2023 |
| Raphaelmd Limited | Health & social care | 2011 |
| Rapid Assessment Ltd | Health & social care | 2026 |
| Rapido Healthcare Services Ltd | Health & social care | 2019 |