| Prodigy Social Ltd. | Hospitality | 2016 |
| Producedbyjack Limited | Arts & recreation | 2019 |
| Product-You-Love Ltd | Manufacturing | 2018 |
| Professional Education and Publishing Limited | Information & communication | 2017 |
| Professional Networking Limited | Other services | 2011 |
| Professional Speaking Association | Other services | 1999 |
| Profile Arches Limited | Manufacturing | 2007 |
| Proformance Consulting Limited | Professional & scientific | 2012 |
| Project 14 Limited | Professional & scientific | 2003 |
| Project M Solutions Limited | Professional & scientific | 2014 |
| Project Management Solutions (Sussex) Limited | Professional & scientific | 2015 |
| Prolec Electrical and Compliance Solutions Limited | Construction | 2013 |
| Prolec Electrical Limited | Construction | 2025 |
| Prolog Business Consulting Limited | Administrative & support | 2025 |
| Promotor Consult Ltd | Professional & scientific | 2020 |
| Properties and Investments (Eastbourne) Limited | Real estate | 1936 |
| Properties Inc Ltd | Real estate | 2025 |
| Property Ally Limited | Professional & scientific | 2021 |
| Property Finders London Ltd | Real estate | 2010 |
| Property GAB Ltd | Real estate | 2023 |
| Property Portfolio Limited | Households | 2011 |
| Property Precision Paint Ltd | Construction | 2026 |
| Property SE Limited | Real estate | 2021 |
| Propexum Limited | Information & communication | 2024 |
| Propharma Locum Limited | Health & social care | 2017 |
| Prophylax Care Group UK Ltd | Health & social care | 2015 |
| Prorent Properties Limited | Real estate | 2025 |
| Prose Limited | Other services | 2020 |
| Prosperium Group Ltd | Administrative & support | 2023 |
| Prosperium Health & Nutrition Ltd | Other services | 2024 |
| Prospex Research Limited | Information & communication | 1994 |
| Prosser Custom Furniture Ltd | Manufacturing | 2025 |
| Protalent Limited | Administrative & support | 2009 |
| Protech Electronic Services Limited | Administrative & support | 2009 |
| Protect Pest Control Limited | Professional & scientific | 2014 |
| Protrusive Dental Limited | Health & social care | 2020 |
| Proudly African Kitchen Limited | Wholesale & retail | 2023 |
| Proudly African Ltd | Wholesale & retail | 2022 |
| Provectus Limited | Information & communication | 2017 |
| Provident Property Limited | Real estate | 2012 |
| Providing Homes Limited | Real estate | 2021 |
| Pruden & Smith Holdings Ltd | Financial services | 2026 |
| PS & DS Holdings Limited | Financial services | 2026 |
| PS Cine Ltd | Information & communication | 2022 |
| PSA Foundation Ltd | Other services | 2025 |
| PSC Birmingham Limited | Wholesale & retail | 2024 |
| PSC EC Limited | Wholesale & retail | 2023 |
| PSC O2 Limited | Wholesale & retail | 2022 |
| PSC Paddington Limited | Wholesale & retail | 2022 |
| Psdp Ltd | Health & social care | 2019 |
| Pshop UK Limited | Wholesale & retail | 2020 |
| PST Bexhill Limited | Administrative & support | 2007 |
| PST Limited | Administrative & support | 1958 |
| PST Travel Limited | Administrative & support | 2016 |
| PTF Law Limited | Professional & scientific | 2015 |
| PTF Media Productions Ltd | Information & communication | 2021 |
| Puckhaber Limited | Wholesale & retail | 2014 |
| Pugs in a TUB Ltd | Other services | 2022 |
| Pulse Power Vibration Ltd | Manufacturing | 2019 |
| Pulseedge Solutions Ltd | Financial services | 2026 |
| Purabiotics Ltd | Wholesale & retail | 2016 |
| Pure Dental Surgery Limited | Health & social care | 2011 |
| Pure Lemon Juice Limited | Professional & scientific | 2014 |
| Pure Polar Ltd | Extraterritorial | 2007 |
| Pure Reflection Services Ltd | Administrative & support | 2020 |
| Purebrite Cleaning Company Limited | Administrative & support | 2021 |
| Purejoy Cleaning Services Ltd | Administrative & support | 2026 |
| Purely Electrical Ltd. | Construction | 2018 |
| Purevo Ltd | Wholesale & retail | 2018 |
| Purify Intelligence Limited | Information & communication | 2025 |
| Purley Downs Residents Company Limited | Households | 2026 |
| Purley Pages Limited | Administrative & support | 2010 |
| Purple Dinosaur Geological Services Ltd | Mining & quarrying | 2015 |
| Purple Heart Records Ltd | Information & communication | 2016 |
| Purple Lofts and Conversions Ltd | Administrative & support | 2016 |
| Purston 11 ST Annes Limited | Households | 2021 |
| PV Environmental Surveys Limited | Construction | 2011 |
| PVT Consulting Limited | Professional & scientific | 2016 |
| Pysden Properties Limited | Real estate | 2022 |
| QCC Designs Ltd | Wholesale & retail | 2018 |
| QD Mortgage & Financial Services Limited | Financial services | 2020 |
| QH Dent Ltd | Health & social care | 2022 |
| QMP Investments Limited | Real estate | 2024 |
| Qology Limited | Information & communication | 2005 |
| QS Management Limited | Professional & scientific | 2007 |
| QSS Consultancy Limited | Information & communication | 2013 |
| QTB International Ltd | Construction | 2023 |
| QUA Vitae Limited | Professional & scientific | 2018 |
| Quadratech Diagnostics Limited | Professional & scientific | 1999 |
| Quality Dream Audio Ltd | Wholesale & retail | 2012 |
| Quality Healthcare Agency Limited | Health & social care | 2010 |
| Quality Roofing South East Ltd | Construction | 2024 |
| Quanstrom Property Ltd | Real estate | 2025 |
| Quantm Medical Services Limited | Health & social care | 2026 |
| Quantum Teknik Limited | Construction | 1999 |
| Quantummark Solutions Limited | Professional & scientific | 2023 |
| Quasar Plumbing and Heating Limited | Construction | 2011 |
| Qubes Limited | Construction | 2003 |
| Queens Mews Eastbourne Limited | Households | 2017 |
| Queensborough Project Management Limited | Professional & scientific | 1986 |