| Protrac Property Ltd | Real estate | 2022 |
| Proverbs Orion Limited | Wholesale & retail | 2024 |
| Provia Ltd | Construction | 2025 |
| Providence Park Management Company Limited | Households | 2011 |
| Provolve Fitness Ltd | Information & communication | 2026 |
| PRS Pharmaceuticals Ltd | Wholesale & retail | 2022 |
| PS Housing Ltd | Real estate | 2021 |
| PSG Civils Ltd | Construction | 2020 |
| PSM Lucky Builders Ltd | Construction | 2024 |
| PSR Payroll & CIS Ltd | Other services | 2021 |
| Psrr Business Ltd | Real estate | 2020 |
| PST Electrical Services Limited | Construction | 2010 |
| PTC Electrical Services Ltd | Construction | 2025 |
| PUB & Grub Services Limited | Hospitality | 2018 |
| Pullout Testing (UK) Limited | Administrative & support | 2013 |
| Pump Mechanical Ltd | Construction | 2021 |
| Puncheon Bar Ltd | Hospitality | 2017 |
| Punjabi Junction Ltd | Hospitality | 2021 |
| Puppy Palace (Kent) Limited | Wholesale & retail | 2024 |
| Pure Coffee Ltd | Wholesale & retail | 2025 |
| Pure Colchester Ltd | Administrative & support | 2016 |
| Pure Homes Investment Ltd | Construction | 2025 |
| Pure Rich Cleaning Ltd | Administrative & support | 2025 |
| Pure Shakes Limited | Wholesale & retail | 2025 |
| Puresound Events Limited | Other services | 2017 |
| Purity Management Limited | Health & social care | 2016 |
| Puro Sagrada Limited | Other services | 2025 |
| Purple Sapphire Properties Ltd | Real estate | 2021 |
| Pursuit Trading Ltd | Other services | 2022 |
| Puure Care Ltd | Health & social care | 2026 |
| PV2K Ltd | Other services | 2011 |
| PVB Management Limited | Professional & scientific | 2022 |
| Pvblic Foundation Ltd | Professional & scientific | 2026 |
| PW Consultancy UK. Ltd | Other services | 2018 |
| PW Motor Performance Parts Ltd | Wholesale & retail | 2025 |
| Q TEC Solutions Ltd | Construction | 2006 |
| Q.F.S. Scaffolding Limited | Construction | 2003 |
| Qduk Ltd | Hospitality | 2016 |
| QFS Scaffolding (Hire & Sales) Ltd | Construction | 2024 |
| Qnchal Trading Ltd | Wholesale & retail | 2020 |
| QPC Franchising Ltd | Other services | 2023 |
| QSR (Bromley) Ltd | Hospitality | 2017 |
| Quality Bags and Travel Luggage Ltd | Other services | 2017 |
| Quality Drylining Ltd | Construction | 2013 |
| Quality Konsultants Limited | Information & communication | 2014 |
| Quality Transport Services Limited | Professional & scientific | 2018 |
| Quantifyo Ltd | Information & communication | 2024 |
| Quantum Capital Holdings Ltd | Real estate | 2025 |
| Quantum Intelligence Limited | Administrative & support | 2011 |
| Quantum Synergetic Ltd | Professional & scientific | 2023 |
| Quark Engineering Limited | Transport & logistics | 2000 |
| Quartobel Ltd | Professional & scientific | 2022 |
| Quaysgo App Ltd | Other services | 2019 |
| Quaysgo Healthcare Ltd | Health & social care | 2020 |
| Qube Haulage Limited | Transport & logistics | 2019 |
| Queens Quay (Embankment) Management Company Limited | Households | 2006 |
| Queens Quay Management Company Limited | Households | 2005 |
| Queest Optics Tech Limited | Wholesale & retail | 2017 |
| Quest Consortium Limited | Information & communication | 2020 |
| Quest Consortium Security Solutions Limited | Information & communication | 2025 |
| Quest Services and Solutions Ltd | Construction | 2015 |
| Quest Vehicle Repairs Ltd | Wholesale & retail | 2022 |
| Questfind Consulting Limited | Professional & scientific | 2006 |
| Questfind Limited | Professional & scientific | 2010 |
| Quick Build Contractors Ltd | Construction | 2022 |
| Quick Printing Ltd | Manufacturing | 2022 |
| Quickpump Services Limited | Manufacturing | 2010 |
| Quickvend Europe Ltd | Professional & scientific | 2025 |
| Quiet Space London Ltd | Construction | 2026 |
| Quill Investments Limited | Real estate | 2018 |
| Quoin (Thamesmead) Management Company Limited | Households | 1985 |
| Qwic Electrical Ltd | Construction | 2018 |
| R & L Installations Ltd | Construction | 2010 |
| R & M Italiano Limited | Hospitality | 2013 |
| R & R Stationery Limited | Wholesale & retail | 2010 |
| R & S Cake Box Ltd | Wholesale & retail | 2024 |
| R a D Printing Limited | Manufacturing | 1998 |
| R a Hurley Limited | Construction | 2012 |
| R B Drylining Ltd | Construction | 2023 |
| R Brows Limited | Administrative & support | 2026 |
| R Clerkson Limited | Construction | 2003 |
| R D Fabrications Limited | Construction | 2013 |
| R Ghumman Construction Limited | Construction | 2025 |
| R Higgs Electrical Ltd | Construction | 2014 |
| R Hunt Commercial Ltd | Other services | 2022 |
| R J Sandhu Properties Ltd | Real estate | 2026 |
| R Jackson Interior Designs Ltd | Construction | 2010 |
| R Jandoo Ltd | Real estate | 2025 |
| R&A Home Improvements Limited | Construction | 2022 |
| R&F Prop Ltd | Real estate | 2020 |
| R&J Electrical Ltd | Construction | 2024 |
| R&L UK Properties Limited | Real estate | 2026 |
| R&R Chalk Limited | Wholesale & retail | 2013 |
| R&R Gym Group Limited | Other services | 2023 |
| R&R Properties Kent Ltd | Real estate | 2015 |
| R&R UK Investments Ltd | Real estate | 2023 |
| R&Z Civil Limited | Construction | 2026 |
| R. DIX Trading Ltd | Financial services | 2019 |
| R.C. Davies Construction Ltd | Construction | 2020 |
| R.F.H. Surveying & Engineering Services Ltd | Construction | 2008 |