| Perreaux-Drury Property Limited | Real estate | 2023 |
| Perrett NVQ Assessor Limited | Education | 2026 |
| Persepolis Investments Ltd | Financial services | 2020 |
| Pet Compare Limited | Information & communication | 2026 |
| Peter LUX Ltd | Other services | 2011 |
| Pharmisee Limited | Information & communication | 2023 |
| Phenomenal Inc Ltd | Professional & scientific | 2021 |
| PHI London Limited | Real estate | 2015 |
| Phil Bath Business Services Consultancy Ltd | Wholesale & retail | 2020 |
| Phillip Chambers Consulting Limited | Professional & scientific | 2014 |
| Phillips Associates Limited | Professional & scientific | 2006 |
| Phoenix Housing Services Ltd | Construction | 2025 |
| Phone Systems 4U Ltd | Extraterritorial | 2018 |
| Photoframesandart Ltd | Wholesale & retail | 2021 |
| PHR Virtual Ltd | Administrative & support | 2026 |
| Pickled Toad Limited | Information & communication | 2024 |
| Pinion Aviation Services Ltd | Transport & logistics | 2023 |
| Pipecraft Innovations Limited | Manufacturing | 2004 |
| Pipetec Plumbing and Heating Limited | Construction | 2003 |
| Pixxl Media Ltd | Information & communication | 2023 |
| Place Commercial Ltd | Professional & scientific | 2024 |
| Planet Netball Ltd | Information & communication | 2025 |
| PLAY9 Ltd | Wholesale & retail | 2023 |
| Plopper Limited | Administrative & support | 2021 |
| Plopper Sussex Ltd | Administrative & support | 2024 |
| Plus 1 Associates Ltd | Administrative & support | 2011 |
| PN Structural Design Limited | Professional & scientific | 2016 |
| PND Oasis Ltd | Real estate | 2026 |
| Pnest Properties Limited | Real estate | 2025 |
| Poets Mews (Hove) Management Limited | Households | 2022 |
| Polar Digital Ltd | Information & communication | 2016 |
| Polish Fire Detection Investments Limited | Financial services | 2025 |
| Polly Communications Ltd | Professional & scientific | 2021 |
| Polythread Studio Ltd | Information & communication | 2025 |
| Positive Change Partners Ltd. | Professional & scientific | 2006 |
| Possible World Ltd | Professional & scientific | 2025 |
| Poynter Properties Ltd | Real estate | 2020 |
| Ppih Holdings Limited | Real estate | 2024 |
| Praetorian Place Ltd | Real estate | 2019 |
| Praxis Project Management Limited | Professional & scientific | 2010 |
| PRE DON Limited | Arts & recreation | 2013 |
| Present Productions Ltd | Information & communication | 2024 |
| Prestige Estate Ventures Limited | Real estate | 2022 |
| Previzia Ltd | Information & communication | 2022 |
| Prime Commercial (Contracts) Limited | Construction | 2025 |
| Prime Consultancy Group Limited | Professional & scientific | 2020 |
| Prime Labour Supplies Limited | Construction | 2025 |
| Prime Qualification Services Limited | Education | 2020 |
| Prime Safety Services Limited | Administrative & support | 2019 |
| Printconnected Limited | Information & communication | 2018 |
| Priory (Patcham) Limited | Real estate | 2006 |
| Priory Construction Co.(Worthing)Limited | Households | 1960 |
| Pristine Driveways Ltd | Construction | 2026 |
| Proconsult IQ Ltd | Professional & scientific | 2024 |
| Progressive Edge Solutions Ltd | Professional & scientific | 2019 |
| Project WOW Limited | Professional & scientific | 2024 |
| Property Edge Tradings Ltd | Construction | 2022 |
| Provident and Regional LLP | | 2017 |
| Prven Identity Limited | Information & communication | 2026 |
| Pswmusicmedia Ltd | Professional & scientific | 2015 |
| PT Systems Consulting Limited | Administrative & support | 2016 |
| Pure Horizon Services Ltd | Administrative & support | 2025 |
| Purple Daze Ltd | Information & communication | 2022 |
| Purple Sugar Company Ltd | Construction | 2012 |
| Push Loyalty Ltd | Information & communication | 2025 |
| Q-Art London Community Interest Company | Education | 2013 |
| Q-Memory Limited | Information & communication | 2026 |
| Q.S Swimming Pools & Leisure Ltd | Professional & scientific | 2022 |
| QED Capital Assets Limited | Real estate | 1987 |
| QED Estates Limited | Real estate | 2012 |
| QED Interim Investments Limited | Real estate | 2016 |
| QED Sustainable Urban Developments Ltd | Real estate | 2014 |
| QED WA Limited | Construction | 2021 |
| Qualitative Street Limited | Professional & scientific | 2013 |
| Quality Ceramics Limited | Health & social care | 2013 |
| QUALITY2DAY Ltd | Professional & scientific | 2018 |
| Quantum 2020 Limited | Construction | 2020 |
| Quick HR Ltd | Administrative & support | 2012 |
| Quinter Lifestyle Ltd | Administrative & support | 2024 |
| QVV Ltd | Real estate | 2020 |
| R and G Technology Limited | Other services | 2003 |
| R Cullen Cleaning Contractors Limited | Administrative & support | 2008 |
| R M Fusion Ltd | Real estate | 2021 |
| R.D.T Recruitment Limited | Administrative & support | 2006 |
| R.L.Habgood & Co.Ltd. | Real estate | 1980 |
| R.T.Page & Sons Limited | Transport & logistics | 1955 |
| Rabbit Demolition and Excavation Limited | Construction | 2003 |
| Rabbit Demolition Holdings Limited | Financial services | 2021 |
| Rabbit Group Holdings Limited | Financial services | 2022 |
| Rabbit Waste Management Limited | Water & waste | 2010 |
| Rachael Beesley Ltd | Other services | 2008 |
| Rainbow Recruitment Services Ltd | Administrative & support | 2020 |
| Rapier Digital Ltd. | Information & communication | 2014 |
| Raven Training & Development Ltd | Education | 2024 |
| Ravenrock Consulting Limited | Financial services | 2024 |
| RAY Houghton Ltd | Information & communication | 2005 |
| RAY Panels Ltd | Manufacturing | 2025 |
| RBL Property Ltd | Real estate | 2022 |
| RCN Property Ltd | Real estate | 2024 |
| RCN Ventures Group Ltd | Financial services | 2024 |