| Plenora Care Ltd | Health & social care | 2026 |
| Plots 5 to 8 Wolfendale Close Management Limited | Real estate | 2015 |
| PLT Surveyor Ltd | Construction | 2018 |
| Plumbtree Ltd | Real estate | 2007 |
| Pm&T Consulting Services Ltd | Professional & scientific | 2014 |
| PML Global Logistics Ltd | Transport & logistics | 2017 |
| Pocock Brothers Limited | Real estate | 1927 |
| Podville Limited | Real estate | 2002 |
| Polaris Visuals Ltd | Information & communication | 2017 |
| Pollards Limited | Financial services | 2001 |
| Pollux 102 Limited | Professional & scientific | 1998 |
| Polyphonic Films Limited | Information & communication | 2006 |
| Pommerac Ltd | Professional & scientific | 2019 |
| Portella Ltd | Professional & scientific | 1999 |
| Porter Williams Consulting Ltd | Professional & scientific | 2025 |
| Posidonia Limited | Construction | 2025 |
| Pound Hill Security Limited | Administrative & support | 2003 |
| Power Tools Paradise Ltd | Wholesale & retail | 2023 |
| Powergenrisk Limited | Financial services | 2016 |
| Powerlaw Limited | Professional & scientific | 2010 |
| Powerplay RH1 Ltd | Arts & recreation | 2024 |
| Powertutors Ltd | Education | 2019 |
| Prapanjam Ltd | Real estate | 2018 |
| Precise Roofing & Guttering Ltd | Construction | 2025 |
| Preferred Air-Con Ltd | Construction | 2022 |
| Preferred Choice Limited | Administrative & support | 2001 |
| Preferred Refrigeration (Gatwick) Ltd | Construction | 2022 |
| Preferred Refrigeration (London) Ltd | Construction | 2022 |
| Preferred Refrigeration (Southern) Ltd | Construction | 2022 |
| Preferred Refrigeration Ltd | Construction | 2008 |
| Premier Carpentry & Building Limited | Construction | 2006 |
| Premier Fire Protection Services Ltd | Public administration | 2026 |
| Presidente 3 Limited | Professional & scientific | 2000 |
| Pridereturn Limited | Households | 1990 |
| Prime Delta Limited | Other services | 2017 |
| Prime Hair & Beauty Distribution Hub Ltd | Wholesale & retail | 2024 |
| Prime Sitefinder Limited | Real estate | 2019 |
| Prime Snowsports and Fitness Ltd. | Arts & recreation | 2010 |
| Primo Tyres Ltd | Wholesale & retail | 2023 |
| Primrose Healthcare Services Limited | Health & social care | 2018 |
| Princess Court Property Management Limited | Households | 1982 |
| Printwindai Ltd | Professional & scientific | 2024 |
| Priory Events (K N J) Limited | Real estate | 2008 |
| Priory Farm Estate Limited | Wholesale & retail | 2018 |
| Priory Padel Limited | Arts & recreation | 2025 |
| Pristine Accounts Limited | Professional & scientific | 2019 |
| Pristine Ponds Ltd | Construction | 2024 |
| Pritchard Street Management Limited | Real estate | 1988 |
| Private Cinema Design Group Ltd | Professional & scientific | 2020 |
| Prizeheist PVT Ltd | Arts & recreation | 2024 |
| PRJ Solutions Ltd | Administrative & support | 2011 |
| Pro Auto Carriage Service Limited | Transport & logistics | 2013 |
| Pro Direct Surfacing Limited | Construction | 2011 |
| Pro Music International Limited | Administrative & support | 2003 |
| Pro Voice Care Ltd | Arts & recreation | 2019 |
| Procorva Limited | Information & communication | 2010 |
| Procure-It Advisory Limited | Professional & scientific | 2025 |
| Professional Health Hub Ltd | Administrative & support | 2024 |
| Proficient Business Management Ltd | Professional & scientific | 2014 |
| Progression Play Limited | Education | 2020 |
| Project FOX Building Solutions Limited | Construction | 2025 |
| Project TAP Ltd | Wholesale & retail | 2025 |
| Promark Ltd | Construction | 2013 |
| Promo Gifts Ltd | Wholesale & retail | 2019 |
| Properties and Homes Ltd | Real estate | 2017 |
| Property Meet Events Limited | Administrative & support | 2026 |
| Propitius Limited | Information & communication | 2022 |
| Protak Scientific Limited | Manufacturing | 2014 |
| Protea Property Maintenance Ltd | Other services | 2016 |
| Provan Management Limited | Professional & scientific | 2014 |
| PRS Combustion Limited | Extraterritorial | 2020 |
| PSS Product Consulting Limited | Information & communication | 2022 |
| Pudding Creative Ltd | Professional & scientific | 2026 |
| Puikpuik Ltd | Information & communication | 2021 |
| Pulcify Ltd | Information & communication | 2025 |
| Pumpserv Ltd | Extraterritorial | 2024 |
| Pumpstock Ltd | Manufacturing | 2011 |
| Pure Golden Honey Ltd | Agriculture & fishing | 2026 |
| Pure Window Cleaning Franchising Limited | Administrative & support | 2014 |
| Pure Window Cleaning Limited | Administrative & support | 2010 |
| Purley Tech Repairs Limited | Other services | 2024 |
| Purple INK Limited | Information & communication | 1998 |
| Purpose Full Ltd | Professional & scientific | 2022 |
| Purposefully Blended Limited | Professional & scientific | 2015 |
| Puzzle Piece Contracting Ltd | Professional & scientific | 2023 |
| PWA Designs Ltd | Professional & scientific | 2013 |
| PWJ Holdings Ltd | Financial services | 2025 |
| Pyrotechnology Limited | Arts & recreation | 2006 |
| Q3C Consultancy Ltd | Professional & scientific | 2026 |
| Qssr Ltd | Professional & scientific | 2018 |
| QSX Ltd | Professional & scientific | 2016 |
| Quadcar Limited | Real estate | 1988 |
| Quality & Care by M.I Ltd | Health & social care | 2022 |
| Quantum Music Artist Management & Promotions Ltd | Arts & recreation | 2012 |
| Quarrylake Ltd | Professional & scientific | 2024 |
| Quartz Business Events Ltd | Administrative & support | 2019 |
| Quartz Business Media Limited | Information & communication | 2009 |
| Quartz Faith Events Ltd | Other services | 2024 |
| Quartz Sequoia Events Ltd | Administrative & support | 2014 |
| Queens Piece Ltd | Wholesale & retail | 2026 |