| Progress Farm Developments Limited | Construction | 2020 |
| Progression Group Ltd | Extraterritorial | 2006 |
| Progression Holdings Ltd | Extraterritorial | 2006 |
| Progressive Motors Ltd | Wholesale & retail | 2018 |
| Projaxis Limited | Professional & scientific | 2021 |
| Project Cooling (UK) Limited | Energy | 2012 |
| Project Dewatering Limited | Construction | 1999 |
| Project Eleven Consultants Limited | Professional & scientific | 2017 |
| Project Eleven Investments Limited | Real estate | 2015 |
| Project Eleven Ltd | Construction | 2013 |
| Project HR Consultants Limited | Professional & scientific | 2003 |
| Project Obsidian Ltd | Construction | 2025 |
| Project Support Limited | Information & communication | 1996 |
| Promaster Engineering Limited | Manufacturing | 1998 |
| Promina Limited | Health & social care | 2025 |
| Pronyx Consulting Limited | Other services | 2020 |
| Proo Style Barber Ltd | Other services | 2023 |
| Proof Advisory Limited | Information & communication | 2026 |
| Proper Cleaning by Vasi Limited | Manufacturing | 2025 |
| Property Amalgamation Limited | Real estate | 2013 |
| Property Elevator Show Limited | Information & communication | 2021 |
| Property First Investments Ltd | Construction | 2018 |
| Property First Management Limited | Real estate | 2000 |
| Property Legal Expert.Com Ltd | Information & communication | 2019 |
| Property Modification Services Ltd | Construction | 2019 |
| Property SO Ltd | Real estate | 2024 |
| Propiteer Abbots Gate Limited | Construction | 2019 |
| Propvia Solutions Ltd | Real estate | 2026 |
| Proreal International Group Ltd | Transport & logistics | 2019 |
| Proreal Recruitment Ltd | Administrative & support | 2021 |
| Proserve Enforcement Solutions Limited | Extraterritorial | 2012 |
| Proshap Limited | Professional & scientific | 2023 |
| Prospect Boxing Promotions Limited | Arts & recreation | 2022 |
| Prospect Building Services Limited | Construction | 2025 |
| Prospect Maritime Limited | Professional & scientific | 2011 |
| PROSPECT21 Ltd | Real estate | 2021 |
| Protea & Partners Ltd | Wholesale & retail | 2024 |
| Protea Recruitment Group Limited | Financial services | 2025 |
| Protech Cosmetics Limited | Wholesale & retail | 2025 |
| Protect and Detect Systems Limited | Administrative & support | 2018 |
| Protectmy Ltd | Financial services | 2024 |
| Protocol Reverse Limited | Professional & scientific | 2023 |
| Proud Supplies Limited | Wholesale & retail | 2024 |
| Provide Homecare Ltd | Health & social care | 2016 |
| Providence House Consultancy Limited | Professional & scientific | 2024 |
| Providex Management Facilities Limited | Households | 2022 |
| Provira (CA) Limited | Financial services | 2023 |
| Provira Funding 2 Limited | Financial services | 2023 |
| Provira Funding Limited | Financial services | 2020 |
| Provira Limited | Financial services | 2020 |
| PRS Cooling Limited | Administrative & support | 2025 |
| PRS Systems Limited | Manufacturing | 2025 |
| Prune to Bloom Ltd | Administrative & support | 2025 |
| Pryke Bros Limited | Transport & logistics | 2002 |
| Pryke Orthopaedic Services Limited | Health & social care | 2019 |
| Pryme Places Ltd | Real estate | 2023 |
| Prîsm Aesthetics by Sahar Ltd. | Health & social care | 2026 |
| PS Essential Books Ltd | Wholesale & retail | 2021 |
| Psalms Properties Ltd | Real estate | 2018 |
| PSJ Carpentry and Building Services Ltd | Manufacturing | 2021 |
| PSP Bulgaria Ltd | Transport & logistics | 2018 |
| PSS Polish Saturday School Ltd | Health & social care | 2020 |
| PSV Recycling Ltd | Water & waste | 2015 |
| Psytechnics Limited | Information & communication | 2000 |
| PT Freight Consultancy Limited | Professional & scientific | 2011 |
| PT Live Ltd | Information & communication | 2018 |
| PTA Financial Services Ltd | Financial services | 2017 |
| PTA Media and Services Group Limited | Professional & scientific | 2019 |
| PTF Solutions Ltd | Professional & scientific | 2015 |
| Ptmt Properties Ltd | Real estate | 2025 |
| Public Sector Reward Services Ltd | Professional & scientific | 2025 |
| Pubuk Ltd | Hospitality | 2024 |
| Puiver's Enterprise Ltd | Wholesale & retail | 2021 |
| Pulse&Glo Ltd | Wholesale & retail | 2025 |
| Pulseflexx Ltd | Wholesale & retail | 2023 |
| Pumps & Filtration Ltd | Manufacturing | 2010 |
| Punch Studios Ipswich Ltd | Information & communication | 2024 |
| Punk Rock Media Ltd. | Information & communication | 2025 |
| Pupurtsili Limited | Real estate | 2021 |
| Purdey Management Limited | Professional & scientific | 2022 |
| Purdis LA Rentals Ltd | Real estate | 2026 |
| Purdis Place Management Company Limited | Households | 2018 |
| Pure Fresh UK Ltd | Wholesale & retail | 2024 |
| Pure Tech Accessories Ltd | Wholesale & retail | 2025 |
| Pure Tech Components Ltd | Wholesale & retail | 2023 |
| Pureease Wellbeing Ltd | Extraterritorial | 2026 |
| Pureelite Cleaning Limited | Administrative & support | 2025 |
| Purely IFA Paraplanning Ltd | Administrative & support | 2026 |
| Purely Metal Limited | Manufacturing | 2008 |
| Puremotion Services Ltd | Transport & logistics | 2025 |
| Purepath Enterprises Ltd | Administrative & support | 2025 |
| Purewellbeing Partners Ltd | Extraterritorial | 2026 |
| Purity Beauty (Ipswich) Limited | Other services | 2014 |
| Purling Transport Limited | Wholesale & retail | 2002 |
| Purple Butterfly Creative Ltd | Administrative & support | 2021 |
| Purple Gorilla Limited | Administrative & support | 2010 |
| Purple Line Limited | Wholesale & retail | 2002 |
| Purple Moose Ltd | Administrative & support | 2022 |
| Purple Rhino Limited | Professional & scientific | 2002 |
| Purpul Tech Ltd | Information & communication | 2024 |