| Phil Cooling Limited | Health & social care | 2015 |
| Philip Interiors Limited | Construction | 2018 |
| Phillip Liggins Construction and Management Limited | Construction | 2025 |
| Philproperties Ltd | Real estate | 2022 |
| Philtay Ltd | Information & communication | 2012 |
| PHO Palace Ltd | Hospitality | 2021 |
| Phoebe Property Group Limited | Real estate | 2026 |
| Phoenician Trading Limited | Wholesale & retail | 2024 |
| Phoenix Compliancy Management Limited | Professional & scientific | 2014 |
| Phoenix Financial Management Ltd | Information & communication | 2020 |
| Phoenix Krest Ltd. | Health & social care | 2024 |
| Phoenix Property Investment (2018) Limited | Real estate | 2018 |
| Phoenix Roofing Supplies Limited | Professional & scientific | 2005 |
| Phoenix Sustainable Power Solutions Ltd | Professional & scientific | 2025 |
| Phoenix Tree Group Ltd. | Education | 2021 |
| Phonecasejungle Limited | Wholesale & retail | 2024 |
| Phonechoice Ltd | Extraterritorial | 2006 |
| Phorm Interiors Ltd | Wholesale & retail | 2020 |
| Photo U Limited | Professional & scientific | 2010 |
| PHOTO4ME Limited | Professional & scientific | 2015 |
| Photodraft Limited | Professional & scientific | 2007 |
| Phull Homes Limited | Real estate | 2007 |
| Phumlag Limited | Health & social care | 2014 |
| Phvm’Services Ltd | Construction | 2023 |
| PI Consult Limited | Professional & scientific | 2004 |
| Piamba Limited | Information & communication | 2010 |
| Piccola Cafeteria &Pizza Ltd | Hospitality | 2024 |
| Picketts of Bexleyheath Ltd | Wholesale & retail | 2016 |
| Picky Finders Limited | Wholesale & retail | 2025 |
| Picky Locks Ltd | Administrative & support | 2025 |
| Picvpic Ltd | Information & communication | 2012 |
| Piece of the PIE Limited | Real estate | 2021 |
| Piehouse Holdings Limited | Financial services | 2023 |
| Pillar and Sage Ltd | Information & communication | 2025 |
| Pillars Property Services Limited | Construction | 2016 |
| Pillory Commercials Limited | Wholesale & retail | 2017 |
| Pillory Containers Limited | Transport & logistics | 2022 |
| PIN Drop Properties Ltd | Construction | 2024 |
| Pineapple Direct Limited | Wholesale & retail | 2000 |
| Pines Carpentry Ltd | Construction | 2019 |
| Pinkies Transport Limited | Transport & logistics | 2010 |
| Pinnacle Electrical Solutions Ltd | Construction | 2025 |
| Pinnacle Farrier Supplies Ltd | Wholesale & retail | 2024 |
| Pinnacle Performance Consulting Ltd | Education | 2026 |
| Pintec Group Ltd | Construction | 2017 |
| Pintec Properties Limited | Construction | 2024 |
| Pion and Henry Limited | Wholesale & retail | 2016 |
| Pipeflow Drainage Solutions Ltd | Water & waste | 2021 |
| Pipeline Technical Services (UK) Ltd | Professional & scientific | 2015 |
| Pipelineworks Limited | Professional & scientific | 2025 |
| Pipes & Fittings UK Ltd | Wholesale & retail | 2014 |
| Pips 1 Limited | Professional & scientific | 2003 |
| Pistonbroke Ltd | Wholesale & retail | 2025 |
| Pitchme.Ai Limited | Professional & scientific | 2025 |
| Pivot Infotech Ltd | Real estate | 2017 |
| PIVOT365 Limited | Construction | 2022 |
| Pixel to Code Limited | Information & communication | 2020 |
| Pixl Resolution Ltd | Information & communication | 2019 |
| Pixplayer Ltd | Wholesale & retail | 2011 |
| PJ Alarms (UK) Ltd | Administrative & support | 2015 |
| PJ Electricals Services Limited | Manufacturing | 2016 |
| PJ Sales & Marketing Limited | | 2009 |
| Pj.Johnson Limited | Wholesale & retail | 2025 |
| PJC Firetecnic Limited | Public administration | 2025 |
| PJG Trading Ltd | Wholesale & retail | 2020 |
| PJP Logistics Ltd | Transport & logistics | 2022 |
| PK Civil Engineering Ltd | Construction | 2018 |
| PK Retail Group Ltd | Wholesale & retail | 2026 |
| PK Shop & Drive Ltd | Wholesale & retail | 2023 |
| PK Shop & Post Ltd | Wholesale & retail | 2023 |
| Pkml Textiles UK Limited | Wholesale & retail | 2020 |
| PL Enterprises Limited | Administrative & support | 2000 |
| PL Site Technical Services Limited | Professional & scientific | 2025 |
| PL Site Technical Support Limited | Professional & scientific | 2026 |
| Plana Plastering Ltd | Construction | 2024 |
| Plantation GWU Ltd | Construction | 2025 |
| Plasterend Services Ltd | Construction | 2016 |
| Platform Lift Partnership Ltd | Manufacturing | 2025 |
| Plati's Limited | Hospitality | 2024 |
| Platinum Building Solutions Ltd | Construction | 2016 |
| Platinum Creations Holdings Limited | Information & communication | 2026 |
| Platis (Cambridge) T/A Salentos Mill Yard Limited | Hospitality | 2026 |
| Plaxtol Building Associates Limited | Other services | 2016 |
| Plaxtol Roofing Company Limited | Construction | 2016 |
| PLAY2GETHER Ltd | Health & social care | 2018 |
| Playcubed Ltd | Construction | 2022 |
| PLAYD8 Ltd | Information & communication | 2022 |
| Playmaker Sport Ltd | Administrative & support | 2017 |
| Pleasant Surprise Limited | Hospitality | 2024 |
| Plescent Ltd | Wholesale & retail | 2021 |
| PLT Fashion Exports Limited | Wholesale & retail | 2025 |
| Plumbdrain Services Ltd | Construction | 2017 |
| Plumbing Parts Ltd | Construction | 2025 |
| Plumbing Smart Limited | Construction | 2016 |
| PLUMBTECH365 Ltd | Construction | 2026 |
| Plumstead Clinic Ltd | Health & social care | 2009 |
| Plwqsdfk Ltd | Manufacturing | 2026 |
| Pmboyd Ltd | Administrative & support | 2012 |
| Pmchse Limited | Administrative & support | 2021 |
| Pmma Associates Limited | Administrative & support | 2011 |