| Pet Family Group Limited | Financial services | 2021 |
| Pet Family Woodland Trust Limited | Arts & recreation | 2021 |
| Peter COX Limited | Construction | 1989 |
| Peter Perks Limited | Manufacturing | 1971 |
| Petmanz International Limited | Health & social care | 2015 |
| Petrolul Pitesti Ltd | Transport & logistics | 2020 |
| Pets Corner (UK) Limited | Wholesale & retail | 1998 |
| Peyia COM Co. Limited | Professional & scientific | 2025 |
| PFA Trading Ltd | Wholesale & retail | 2024 |
| PG International Limited | Professional & scientific | 1961 |
| PH Property Ltd | Real estate | 2019 |
| Phalangee Ltd | Wholesale & retail | 2025 |
| Phantom Sports Ltd | Administrative & support | 2017 |
| Phantom Wholesale Limited | Manufacturing | 2024 |
| Pharian Limited | Information & communication | 2009 |
| Pharmalancers Limited | Administrative & support | 2021 |
| Phil Sutton Landscapes Ltd | Administrative & support | 2022 |
| Philosophical Productions Limited | Information & communication | 2010 |
| Phoenix Motortrade Ltd | Wholesale & retail | 2023 |
| Phoenix Place | Education | 2014 |
| Phoenix Property Sources Limited | Households | 2025 |
| Physiopulse Recruitment Ltd | Administrative & support | 2024 |
| Piano Action Wings Ltd | Professional & scientific | 2015 |
| Pick ME Cars Ltd | Transport & logistics | 2025 |
| Pics & INK Limited | Wholesale & retail | 2018 |
| Picxcells Limited | Transport & logistics | 2014 |
| Pidgley Sporting Limited | Arts & recreation | 2025 |
| Pilates Pro Placement Ltd | Administrative & support | 2025 |
| Pima Transport Ltd | Administrative & support | 2022 |
| Pine Ridge Construction Limited | Construction | 2014 |
| Pine Ridge Homes Limited | Construction | 2014 |
| Pinhoe Dental Centre Limited | Health & social care | 2010 |
| Pinnacle Furniture Limited | Construction | 2011 |
| Pinnacle Height Properties Ltd | Real estate | 2023 |
| Pinnacle Placement Limited | Administrative & support | 2025 |
| Pinnacle Transformation Group Ltd | Information & communication | 2026 |
| Pinser Ltd | Professional & scientific | 2012 |
| Pioneer Aero UK Limited | Transport & logistics | 2023 |
| Piper Rotor Craft Ltd | Transport & logistics | 2018 |
| Piphunterforex Ltd | Financial services | 2026 |
| Pirates Ahoy! Limited | Information & communication | 2016 |
| Pixelpioneer Revival Ltd | Wholesale & retail | 2024 |
| Pixham Investment Limited | Real estate | 2020 |
| Pixton Park Estate LLP | | 2022 |
| Pizza Time Crawley Ltd | Hospitality | 2014 |
| PJ Delivery & Logistics Ltd | Transport & logistics | 2014 |
| PJB Electrical Limited | Construction | 2018 |
| PJW Associates Limited | Wholesale & retail | 2004 |
| PK Hospitality Ltd | Hospitality | 2023 |
| Plain Sailing Waste Clearance Ltd | Wholesale & retail | 2023 |
| Plane Consultants Limited | Professional & scientific | 2017 |
| Planmove Residents Management Limited | Real estate | 1988 |
| Plant Nominees Ltd | Extraterritorial | 1972 |
| Platacs Ltd | Transport & logistics | 2012 |
| Platinum Electrical South Limited | Construction | 2021 |
| Platinum Estates Ltd | Hospitality | 1999 |
| Platinum New Homes Development Limited | Construction | 2005 |
| Playgra Ltd | Information & communication | 2018 |
| Pleasant Cleaning Services Ltd | Administrative & support | 2026 |
| PM Autotech Limited | Wholesale & retail | 2019 |
| Pmgconsultants Ltd | Information & communication | 2025 |
| PMK Partners Ltd | Real estate | 2024 |
| PMU London Limited | Other services | 2023 |
| Pnbcourier Ltd | Transport & logistics | 2025 |
| POE Designs Ltd | Wholesale & retail | 2025 |
| Point to Point Glass and Glazing Ltd | Construction | 2023 |
| Pointing and Brickwork Ltd | Construction | 2024 |
| Pokemonstore UK Ltd | Wholesale & retail | 2026 |
| Polar Heat Ltd | Construction | 2018 |
| Polosmak Tani Ltd | Wholesale & retail | 2026 |
| POM Consultancy Ltd | Professional & scientific | 2022 |
| Pool Buyer Publishing Ltd | Information & communication | 2025 |
| POP UP Party Hire Ltd | Administrative & support | 2021 |
| Popalzai.Uk Limited | Wholesale & retail | 2025 |
| Popeswood Management Company Ltd | Households | 2018 |
| Porta Partners LLP | | 2024 |
| Ports Transfer Limited | Transport & logistics | 2024 |
| Portsea Dental Care Limited | Health & social care | 2010 |
| Portwine Services Limited | Manufacturing | 2019 |
| Positively Travel Ltd | Education | 2010 |
| Possible Advisory Ltd | Information & communication | 2025 |
| Posthorax Limited | Wholesale & retail | 2013 |
| Posthorax RD Sales Limited | Wholesale & retail | 2015 |
| Pothin Property Ltd | Real estate | 2025 |
| Pottage Ltd | Real estate | 2020 |
| Pouch Machine Limited | Wholesale & retail | 2016 |
| Pouch Quote Ltd | Wholesale & retail | 2019 |
| Pound Hill (Caterers) Limited | Hospitality | 1989 |
| Pound Hill Properties Ltd | Real estate | 2026 |
| Power 365 Limited | Energy | 2016 |
| Power Access Systems Limited | Construction | 1983 |
| Power Cheer (Essex) | Arts & recreation | 2026 |
| Power Logistics Solutions Ltd | Transport & logistics | 2023 |
| Powertime Limited | Information & communication | 2019 |
| PP Assessor Ltd | Professional & scientific | 2025 |
| PPC Training Ltd | Wholesale & retail | 2023 |
| PR - Pattern Recruitment Ltd | Administrative & support | 2023 |
| PR Mgmt Ltd | Wholesale & retail | 2025 |
| PR Squared Limited | Professional & scientific | 2003 |
| Praise Personnel Limited | Administrative & support | 2022 |