| Prosper Abroad Limited | Professional & scientific | 2019 |
| Prospera Land Group Limited | Other services | 2025 |
| Prosperfine Ltd | Real estate | 2016 |
| Prosperity Planning Ltd | Financial services | 2018 |
| Prosperity Property Development Limited | Construction | 2022 |
| Prospero Software Limited | Information & communication | 2017 |
| Prosperous Trading Limited | Extraterritorial | 2013 |
| Prospire Ltd | Real estate | 2024 |
| Prospur Ltd | Extraterritorial | 2025 |
| Prosulis Ltd | Professional & scientific | 2019 |
| Protag Retail Security Limited | Professional & scientific | 2000 |
| Protech Holdco Ltd | Financial services | 2026 |
| Protech Publications Ltd | Information & communication | 2019 |
| Protech Resource Ltd | Administrative & support | 2023 |
| Protech Software Solutions Ltd | Information & communication | 2014 |
| Protechnic Investments Limited | Real estate | 2008 |
| Protect Electrical Limited | Construction | 2016 |
| Protect Property Management Ltd | Construction | 2025 |
| Protect-A-Plate Ltd | Information & communication | 2025 |
| Protection Vessels International Limited | Administrative & support | 2009 |
| Protectioncoat Developments Limited | | 2006 |
| Protein Palace Ltd | Hospitality | 2025 |
| Protel Data Services Ltd | Financial services | 2022 |
| Proteus Creative Communications Limited | Professional & scientific | 1990 |
| Proteus Marketing Communications Limited | Professional & scientific | 2002 |
| Protheorem Ltd | Information & communication | 2020 |
| Protheroes House Management Committee Limited | Households | 2009 |
| Protolyst Technologies Ltd | Information & communication | 2021 |
| Proton Intellectual Property Limited | Professional & scientific | 2020 |
| Protouchs Services Ltd | Administrative & support | 2025 |
| Proud Homes Limited | Real estate | 2025 |
| Proud Roofers Ltd | Construction | 2025 |
| Proudclip Ltd | Manufacturing | 2025 |
| Provatas Limited | Wholesale & retail | 2023 |
| Prove Property Ltd | Financial services | 2025 |
| Proven Property Ltd | Real estate | 2023 |
| Provenance Collective Limited | Other services | 2020 |
| Provenance Supply Chain Management LLP | | 2009 |
| Provencrown Limited | Construction | 1979 |
| Provera Ltd | Administrative & support | 2025 |
| PROVERBS1125 Properties Limited | Real estate | 2023 |
| Providence Engineering Limited | Real estate | 1999 |
| Providence Rise Management Limited | Administrative & support | 2004 |
| Providing Opportunities and Support (Props) | Education | 2001 |
| Province Innovation Ltd. | Manufacturing | 2013 |
| Provisma Ltd | Professional & scientific | 2005 |
| Provito Couriers Ltd | Transport & logistics | 2020 |
| Proviz Content Creation Ltd | Professional & scientific | 2025 |
| Provost Developments (Boughrood) Ltd | Construction | 2019 |
| Provost Developments (Crickhowell) Limited | Construction | 2020 |
| Provost Developments (Holburne) Limited | Real estate | 2025 |
| Provost Developments (Ross Road) Limited | Construction | 2020 |
| Provost Holdings Limited | Financial services | 2020 |
| Prowords Ltd | Professional & scientific | 2003 |
| Prowrap Limited | Professional & scientific | 2015 |
| Prowse Financial Services Ltd | Financial services | 2019 |
| Prowting and Partners Ltd | Real estate | 2003 |
| Proxima Innovations Limited | Wholesale & retail | 2025 |
| Proxima IT Services Ltd | Information & communication | 2025 |
| Proximo Technology Limited | Manufacturing | 2013 |
| Proxsea Data Ltd | Information & communication | 2025 |
| Proxy Properties Limited | Real estate | 2013 |
| Proxy Studio Limited | Professional & scientific | 2013 |
| Proxy Ventures UK Limited | Professional & scientific | 2013 |
| PRS Electrical Ltd | Construction | 2017 |
| Prsuppliers Ltd | Wholesale & retail | 2025 |
| Prvm Properties UK Ltd | Real estate | 2024 |
| Prws (Bristol) Limited | Professional & scientific | 2002 |
| Pryde Properties Ltd | Households | 2020 |
| Pryvate Technologies Ltd | Information & communication | 2020 |
| PS Ophthalmic Surgery Limited | Health & social care | 2022 |
| PS RAD Limited | Real estate | 2023 |
| PS Travel (Bristol) Limited | Administrative & support | 2014 |
| PS27 Limited | Hospitality | 2011 |
| PSB Limited | Professional & scientific | 1990 |
| PSC Contracting Solutions Limited | Professional & scientific | 2017 |
| PSE 2 Ltd | Professional & scientific | 2016 |
| PSE2 Earthing Limited | Professional & scientific | 2018 |
| Psebt Limited | Financial services | 2023 |
| Psgh Ltd | Information & communication | 2023 |
| PSI Bristol Ltd | Hospitality | 2025 |
| Psiba Productions Limited | Information & communication | 2007 |
| Psimaera Ltd | Professional & scientific | 2010 |
| Psjb.Net Ltd | Information & communication | 2021 |
| PSL Direct Limited | Information & communication | 2003 |
| Psmg Commissioning Ltd | Construction | 2016 |
| Psmg Maintenance Ltd | Administrative & support | 2008 |
| PSP Building Solutions Ltd | Construction | 2023 |
| PSP Family Ltd | Other services | 2017 |
| PSP Leisure Limited | Arts & recreation | 2013 |
| PSP Technical Services Limited | Other services | 2006 |
| PSS Enterprises Ltd | Health & social care | 2021 |
| Pssd Network Ltd | Other services | 2026 |
| Pssdn Ltd | Other services | 2026 |
| PST Holdings Limited | Financial services | 2019 |
| PSV Compliance and Training Limited | Professional & scientific | 2023 |
| PSYCH360+ Ltd | Health & social care | 2024 |
| Psychologi Limited | Wholesale & retail | 2024 |
| Psychological Limited | Manufacturing | 2023 |
| Psychology Assured Limited | Health & social care | 2017 |