| Palmers | | 1980 |
| Palmers Green Dental Care Limited | Health & social care | 2025 |
| PAN Champions UK Ltd | Arts & recreation | 2022 |
| Panda Cubs Outdoor English Ltd | Education | 2020 |
| Panelcare Limited | Wholesale & retail | 2003 |
| Pangaea Advisors Limited | Professional & scientific | 2018 |
| Pannrad Ltd | Professional & scientific | 2025 |
| Panther Consulting Limited | Professional & scientific | 2026 |
| Panzer (Delicatessen) Limited | Wholesale & retail | 1944 |
| Papa B'S Limited | Hospitality | 2023 |
| Papa Bianco Ltd | Hospitality | 2020 |
| Papaver PM Limited | Households | 2021 |
| Paper Mouse Ltd | Information & communication | 2023 |
| Papillon Commercial Limited | Construction | 2007 |
| Paramstat Limited | Professional & scientific | 2011 |
| Parberry Estates Limited | Professional & scientific | 1998 |
| Park Avenue Partnership Limited | Real estate | 2015 |
| Park Farm Glazing Limited | Construction | 2018 |
| Parkerdell Refining Limited | Real estate | 1976 |
| Parkersteel Limited | Manufacturing | 2019 |
| Parkside (Folkestone) Management Company Limited | Households | 2018 |
| Parque Investment Company Limited | Energy | 1982 |
| Partners-To Asset Management Ltd | Administrative & support | 2025 |
| PARTS24 Ltd | Wholesale & retail | 2023 |
| Party Masks Ltd | Wholesale & retail | 2021 |
| Parva Portio Limited | Manufacturing | 2019 |
| PAS Contracting Ltd | Construction | 2026 |
| Patacrepe Limited | Hospitality | 2013 |
| Patadi UK Ltd | Professional & scientific | 2025 |
| Patch Investments Ltd | Financial services | 2023 |
| Pathania Limited | Hospitality | 2010 |
| Pathfinder Pictures Limited | Information & communication | 2010 |
| Patriana Limited | Wholesale & retail | 2004 |
| Patxi Holdco Limited | Professional & scientific | 2024 |
| Paul & Jane Mansfield Soft Fruits Ltd | Agriculture & fishing | 2003 |
| Pavistamp UK Ltd | Manufacturing | 2022 |
| Pawfect Journey Limited | Transport & logistics | 2019 |
| PAY IT Back UK CIC | Health & social care | 2021 |
| Payserv Ltd | Administrative & support | 2015 |
| PBM Construction Ltd | Construction | 2020 |
| Pcfc Limited | Health & social care | 2022 |
| PCS Real Estate UK Ltd | Real estate | 2019 |
| PCW Services Kent Ltd | Professional & scientific | 2019 |
| PD Popov Ltd | Transport & logistics | 2020 |
| PDK Outdoor Education Provider CIC | Education | 2021 |
| PE Business Services Limited | Hospitality | 2009 |
| Peace Together Ltd | Financial services | 2015 |
| Peacezra Pavilion Food & Beauty Store Ltd | Wholesale & retail | 2020 |
| Peacock Events and Services Limited | Hospitality | 2011 |
| Peacock Schools Catering Ltd | Hospitality | 2024 |
| Peak Agency Design Ltd | Professional & scientific | 2019 |
| Peak Construction & Management Ltd | Construction | 2007 |
| Peak Performance Fitness Ltd | Education | 2023 |
| Pearl Healthcare Holdings Limited | Administrative & support | 2025 |
| Pearl Star Thailand Limited | Health & social care | 2023 |
| Pedaler on the Port Limited | Hospitality | 2022 |
| Peekaboo Playhouse Ltd | Hospitality | 2025 |
| Peelers Court Management Company Limited | Households | 1999 |
| Peevi Groceries Ltd | Wholesale & retail | 2018 |
| Pegasus Climbing Ltd | Manufacturing | 2023 |
| Pembles Business Services Limited | Professional & scientific | 2009 |
| Penganova Consulting Ltd | Professional & scientific | 2026 |
| Penne & Friends Ltd | Wholesale & retail | 2024 |
| Penrose Accounting Ltd | Professional & scientific | 2022 |
| Pentins Business Advisers Limited | Extraterritorial | 2022 |
| Pentins Financial Planners Ltd | Financial services | 2018 |
| People and Prompt Ltd | Information & communication | 2026 |
| Peregrine Electrical Limited | Construction | 2016 |
| Peregrine House Ltd | Hospitality | 2024 |
| Perfect Press Ltd | Manufacturing | 2026 |
| Performance Catalyst Limited | Professional & scientific | 2018 |
| Perplex Design Ltd | Professional & scientific | 2023 |
| Perryfield Properties Limited | Real estate | 1995 |
| Persica Pharmaceuticals Limited | Administrative & support | 2013 |
| Persistent Innovation Ltd | Construction | 2025 |
| Personal Safety Academy Ltd | Education | 2022 |
| Petcroft Limited | Hospitality | 2012 |
| Peter Fisk Associates Limited | Extraterritorial | 2022 |
| Peter Waddell Holdco Limited | Professional & scientific | 2016 |
| Petershams Millinery Ltd | Wholesale & retail | 2014 |
| Petham Parish Events C.I.C. | Arts & recreation | 2023 |
| Petlaw Limited | Education | 2020 |
| Petros Group Ltd | Construction | 2026 |
| Petrovmed Limited | Health & social care | 2024 |
| Pettman Roberts Projects Limited | Construction | 2015 |
| PF Bradshaw Properties Limited | Real estate | 2025 |
| PGC Data Designs Ltd | Information & communication | 2016 |
| Pharmadynamics UK Limited | Wholesale & retail | 2008 |
| Pharmadyne Consulting Ltd | Professional & scientific | 2023 |
| Pharmassess Limited | Manufacturing | 2003 |
| Pharmastat Consulting Ltd | Professional & scientific | 2013 |
| Pharon Financial Planning Limited | Extraterritorial | 2005 |
| Pharon Independent Financial Advisers Limited | Financial services | 1973 |
| Pharos Accounts Limited | Professional & scientific | 2023 |
| Phiko Limited | Wholesale & retail | 2024 |
| Phil Davenport Ltd | Construction | 2012 |
| Phileo Care Provider Limited | Water & waste | 2019 |
| Phimico Ltd | Information & communication | 2015 |
| Phoenix Estates Inc Ltd | Real estate | 2024 |
| Phoenix Mini Plant Hire Limited | Administrative & support | 2010 |