| Plumbex Plumbing and Heating Ltd | Construction | 2022 |
| Plumbing & Heating Promotions Limited | Professional & scientific | 2015 |
| Plumerr Ltd | Construction | 2023 |
| PM Carpentry Ltd | Construction | 2019 |
| PM Controls Ltd | Administrative & support | 2022 |
| PM19 Limited | Construction | 2025 |
| PMB Homes Limited | Real estate | 2023 |
| PME Services Ltd | Administrative & support | 2023 |
| PMM Refurbishment Ltd | Construction | 2026 |
| PMS International Group PLC | Wholesale & retail | 1979 |
| PMS International Holdings PLC | Wholesale & retail | 1985 |
| PMU Properties Limited | Real estate | 2025 |
| Pocket Aces FUN Casino Limited | Other services | 2020 |
| Poco Construct Ltd | Construction | 2021 |
| Poké Cubes Ltd | Wholesale & retail | 2024 |
| Pole 2 Pole Scaffolding Ltd | Construction | 2004 |
| Polished Concrete Interiors Ltd | Construction | 2019 |
| Poly Sarees Ltd | Wholesale & retail | 2024 |
| POP Create Limited | Professional & scientific | 2020 |
| Popas Trans Ro-Uk Ltd | Transport & logistics | 2024 |
| Poppy Productions Limited | Professional & scientific | 2018 |
| Porchester Road (Billericay) Management Company Limited | Administrative & support | 1986 |
| Port Express Limited | Transport & logistics | 2004 |
| Port-Smith (U.K) Limited | Public administration | 2023 |
| Portcullis Property Management Limited | Households | 2019 |
| Portland Swiss Limited | Real estate | 2013 |
| Posh Maintenance Limited | Construction | 2010 |
| Posh Paws International Limited | Wholesale & retail | 2015 |
| Poshkollect UK Ltd | Wholesale & retail | 2025 |
| Posie and Penn Limited | Manufacturing | 2025 |
| Postie Traffic Management Limited | Construction | 2017 |
| Potenza Technology Holdings Limited | Financial services | 2018 |
| Potenza Technology Limited | Information & communication | 1999 |
| Potton Kare Services Ltd | Health & social care | 2012 |
| Potton Services Ltd | Administrative & support | 2017 |
| Poulterite Limited | Professional & scientific | 2025 |
| POW Studios Ltd | Professional & scientific | 2010 |
| Power Adhesives Limited | Manufacturing | 1974 |
| Power Cable Installation Ltd | Construction | 2025 |
| Power Consultancy Services Limited | Professional & scientific | 2019 |
| Power House Ltd | Information & communication | 2018 |
| Powerpros Group Ltd | Construction | 2024 |
| PP MM Ltd | Hospitality | 2017 |
| Ppaa Limited | Information & communication | 2025 |
| Ppda Install Ltd | Construction | 2023 |
| PR Digital Media Limited | Extraterritorial | 2018 |
| PRA Gates Limited | Other services | 2013 |
| Prachi Limited | Financial services | 2026 |
| Practical Development Ltd | Education | 2022 |
| Practicepeak Consulting Limited | Professional & scientific | 2025 |
| Pragmatic Care Ltd | Health & social care | 2023 |
| Praisemanny Healthcare Services Limited | Health & social care | 2018 |
| Pralakshaa Ltd | Information & communication | 2024 |
| Prayer Fire Global | Other services | 2023 |
| Prayer Walk Missions Ltd | Education | 2005 |
| Precene Ltd | Health & social care | 2026 |
| Precision Fire Ltd | Public administration | 2023 |
| Precision Lift Services Limited | Construction | 1996 |
| Precision One Ltd | Transport & logistics | 2017 |
| Precision Paving & Property Services Limited | Households | 2021 |
| Prem's Solutions Ltd | Real estate | 2016 |
| Premier Alloy Wheels (UK) Limited | Other services | 2014 |
| Premier Engineering and General Finance Limited | Financial services | 2003 |
| Premier Installations London Limited | Construction | 2014 |
| Premier Jointing Limited | Construction | 2014 |
| Premier Paint & Decor Ltd | Construction | 2025 |
| Premier Sports Shop Limited | Wholesale & retail | 2012 |
| Premiere Property Developments Limited | Real estate | 2023 |
| Premises Maintenance Limited | Other services | 2019 |
| Premises Maintenance Locksmiths Limited | Other services | 2020 |
| Premium Media London Limited | Other services | 2017 |
| Premium Stable Mats Ltd | Construction | 2020 |
| Prepped & Packed Ltd. | Wholesale & retail | 2015 |
| Presan Care Ltd | Administrative & support | 2022 |
| Press Play Advertise Ltd | Wholesale & retail | 2024 |
| Prestige Care & Support Limited | Other services | 2014 |
| Prestige Granite & Quartz Ltd | Manufacturing | 2020 |
| Prestige Home Improvements Essex Ltd | Construction | 2025 |
| Prestige Thermal Limited | Construction | 2021 |
| Prestige Water Tank Ltd | Construction | 2020 |
| Prestigensia Ltd | Real estate | 2025 |
| Prestiige Priority Ltd | Health & social care | 2026 |
| Pretty and Perfect Clothing Limited | Wholesale & retail | 2015 |
| Price My Project Ltd | Professional & scientific | 2023 |
| Pridmore Bookmakers Limited | Professional & scientific | 2009 |
| Prihantech Group Limited | Information & communication | 2025 |
| Primary Healthcare Partners Ltd | Health & social care | 2024 |
| Primary Pathways Learning & Support CIC | Education | 2026 |
| Prime Accounting Software Limited | Information & communication | 2012 |
| Prime Construction Services Ltd | Construction | 2023 |
| Prime Core Holdings Limited | Financial services | 2026 |
| Prime Engineering Services Limited | Professional & scientific | 2026 |
| Prime Finish Decorating Limited | Construction | 2021 |
| Prime Group PM Ltd | Wholesale & retail | 2024 |
| Prime Plumbing and Heating (Essex) Ltd | Construction | 2015 |
| Prime Pulse Proprties Ltd | Real estate | 2024 |
| Prime Spine Chiropractic Limited | Health & social care | 2024 |
| Prime Transportation Ltd | Transport & logistics | 2025 |
| Prime Volt Ltd | Construction | 2026 |
| Primec Vent Ltd | Manufacturing | 2020 |