| Planecode Limited | Construction | 1999 |
| Planet AV Limited | Information & communication | 2021 |
| Planned Environmental Services Ltd | Construction | 1988 |
| Plant Giant Ltd | Other services | 2026 |
| Plantain Papi Ltd | Wholesale & retail | 2026 |
| Plantworks Studio Ltd | Wholesale & retail | 2026 |
| Planwey Limited | Professional & scientific | 2021 |
| Plaster Mouldings London Limited | Manufacturing | 2023 |
| Plastic Revolution Ltd | Manufacturing | 2021 |
| PLAT1NUMLINKS Ltd | Real estate | 2021 |
| Platinum Abode Limited | Real estate | 2023 |
| Platinum Collective Ltd | Wholesale & retail | 2025 |
| Platinum GI Limited | Manufacturing | 2016 |
| Platinum Group 5 Ltd | Real estate | 2025 |
| Platinum Intelligence Ltd | Information & communication | 2026 |
| Platinum Nexus Limited | Information & communication | 2026 |
| Platinum PPF Limited | Wholesale & retail | 2021 |
| Platinum Surveys Ltd | Professional & scientific | 2022 |
| Platinum Vehicle Storage Limited | Transport & logistics | 2026 |
| Plato Consultancy Services Limited | Construction | 2020 |
| Play One Limited | Professional & scientific | 2006 |
| Pleshey Forge Ltd. | Construction | 2007 |
| Plinthpak Limited | Professional & scientific | 2013 |
| Plock Security Ltd | Administrative & support | 2026 |
| PLS Concrete Batching Plant Spares & Supplies Limited | Wholesale & retail | 2014 |
| Plum Property Services Limited | Construction | 2018 |
| Plumb and Tile Limited | Construction | 2016 |
| Plumb Associates Limited | Agriculture & fishing | 2008 |
| Plumbelec Ltd | Construction | 2024 |
| Plumbsafe Cambridge Ltd | Construction | 2017 |
| Plumcot Properties Limited | Real estate | 2025 |
| Plus Tuning Ltd | Wholesale & retail | 2023 |
| Plushjet Ltd | Administrative & support | 2025 |
| Pluslink Marketing Limited | Real estate | 2001 |
| Plusone Global Limited | Education | 2017 |
| Pluto Poker Ltd | Arts & recreation | 2022 |
| PMA Witham Ltd | Arts & recreation | 2023 |
| PMC Partnership (Essex) Limited | Professional & scientific | 2022 |
| PMF Maintenance Limited | Construction | 2013 |
| PMG Partnership Limited | Professional & scientific | 2012 |
| PMN Design Services Ltd | Professional & scientific | 2014 |
| PMR Roofing & Construction Ltd | Construction | 2025 |
| PMS Pure Lifestyle Limited | Other services | 2007 |
| Pmuni Ltd | Education | 2024 |
| PNT Konsult Ltd | Professional & scientific | 2019 |
| PNT Land Ltd | Real estate | 2020 |
| PNT Property Holdings Ltd | Real estate | 2017 |
| PNT SPV1 Ltd | Construction | 2022 |
| Pntl Ltd | Professional & scientific | 2018 |
| PO Group Ltd | Administrative & support | 2019 |
| Pocknells (SWF) Limited | Financial services | 2023 |
| Pocknells Audit Limited | Professional & scientific | 2018 |
| Pocknells Group Limited | Financial services | 2021 |
| Pocknells LLP | | 2011 |
| Pocono Holdings Limited | Financial services | 2011 |
| POD Housing UK Ltd | Construction | 2026 |
| Pod.Med. Limited | Health & social care | 1996 |
| Poda Symbol Properties Ltd | Real estate | 2026 |
| Podlot Studios Ltd | Information & communication | 2018 |
| POJO25 Limited | Real estate | 2006 |
| Pokur Technologies Ltd | Information & communication | 2008 |
| Polar Creative Studio Limited | Professional & scientific | 2013 |
| Polaris Life Coaching Ltd | Professional & scientific | 2025 |
| Poleti Cabs Ltd | Transport & logistics | 2018 |
| Polished Home Cleaning Services Limited | Administrative & support | 2016 |
| Polkadotfrog Limited | Administrative & support | 2003 |
| Polly ANN Homes Limited | Real estate | 2014 |
| Polly Buckle Limited | Information & communication | 2013 |
| Pollyoncontent Limited | Professional & scientific | 2025 |
| Polska Babka Ltd | Wholesale & retail | 2021 |
| Ponentine Two Limited | Administrative & support | 2005 |
| Ponneth Property Limited | Real estate | 2021 |
| Ponting Engineering Consultants Limited | Manufacturing | 2015 |
| Poolbar Limited | Wholesale & retail | 2023 |
| Pooles Lane Industrial Units Ltd | Administrative & support | 2023 |
| Poor Mans Country Club Ltd | Hospitality | 2018 |
| Popeye Properties Limited | Real estate | 2023 |
| Poppet Construction Limited | Construction | 2019 |
| Poppet Group Limited | Real estate | 2024 |
| Popsys Reindeer Limited | Agriculture & fishing | 2023 |
| Popularity Pulse Media Ltd. | Professional & scientific | 2025 |
| Porgi Consulting Limited | Professional & scientific | 2025 |
| Portable Toilet Hire (Essex) Limited | Other services | 2018 |
| Portable Toilet Hire (London) Limited | Administrative & support | 2014 |
| Portact Limited | Hospitality | 2003 |
| Portcullis Wealth Planning Limited | Financial services | 2019 |
| Portcullis Wealth Retention Ltd | Financial services | 2019 |
| Portionbox 26 Ltd | Hospitality | 2026 |
| Portionbox Ltd | Hospitality | 2023 |
| Portmellon Apartments Limited | Real estate | 1998 |
| Poseday Construction Ltd | Construction | 2025 |
| Poseday Energy Management Ltd | Professional & scientific | 2011 |
| Poseday Property Solutions Limited | Real estate | 2016 |
| Poseidon Pump Solutions Ltd | Manufacturing | 2025 |
| Posh Garden Marquees Limited | Arts & recreation | 2012 |
| Posh Maintenance (South-East) Limited | Construction | 2017 |
| Posh Valet & Cleaning Services Limited | Administrative & support | 2018 |
| Posh Valeting Services Limited | Administrative & support | 2020 |
| Positive Energy Electrical Limited | Construction | 2017 |
| POSITIVEMINDS82 Limited | Health & social care | 2021 |