| P.I.P.(Highway)Limited | Real estate | 1954 |
| P.J.S. Management Services Limited | Professional & scientific | 1984 |
| P.J.Williamson & SON Limited | Construction | 1970 |
| P1 Design Limited | Education | 2006 |
| P2P Community Ltd | Transport & logistics | 2024 |
| Paaras Limited | Wholesale & retail | 2025 |
| Pacific Shelf 1871 Limited | Information & communication | 2021 |
| Packimpex UK Limited | Administrative & support | 2020 |
| Packwise Motivity Sales Limited | Manufacturing | 2008 |
| Paddleboard Maidenhead Limited | Education | 2021 |
| Padel Berkshire Limited | Arts & recreation | 2023 |
| Padel Maidenhead Limited | Arts & recreation | 2023 |
| Padel Right UK Limited | Construction | 2024 |
| Padel Windsor Limited | Arts & recreation | 2025 |
| Padyear Limited | Professional & scientific | 1989 |
| Paeonya Ltd | Wholesale & retail | 2021 |
| PAK Kashmir Halal Meat & Groceries Ltd | Wholesale & retail | 2024 |
| Pakistan Netball Academy Limited | Arts & recreation | 2025 |
| Pakistan Policy and Development Network C.I.C. | Professional & scientific | 2026 |
| Paksec Limited | Professional & scientific | 2010 |
| PAL Deep Ltd | Wholesale & retail | 2016 |
| Palatinate Promotions Limited | Other services | 2014 |
| Palcare Limited | Health & social care | 2013 |
| Pamm Locum Limited | Health & social care | 2025 |
| Panay Limited | Construction | 2018 |
| Panay UK Limited | Wholesale & retail | 2019 |
| Panda Window Cleaning Ltd | Construction | 2021 |
| Pandtbars Ltd | Hospitality | 2023 |
| Panoramic Data Limited | Information & communication | 2009 |
| Panvera Trading Limited | Wholesale & retail | 2025 |
| Papamt Limited | Wholesale & retail | 2022 |
| Paperbefore Limited | Professional & scientific | 1996 |
| Paragon Associates Ltd | Real estate | 2024 |
| Paragon Music Ltd | Information & communication | 2021 |
| Paragon Prestige Chauffeur Ltd | Transport & logistics | 2025 |
| Paragon Proav Ltd | Other services | 2024 |
| Paramount Build Group Ltd | Construction | 2025 |
| Paratira Limited | Information & communication | 2025 |
| Park House (Walton) Ltd | Real estate | 2007 |
| Park Lane Capital Holdings Limited | Hospitality | 2015 |
| Park Lane Capital Limited | Administrative & support | 2012 |
| Parsley Design & DEV Ltd | Information & communication | 2025 |
| Parthos UK Ltd | Manufacturing | 2009 |
| Partners Studio Ltd. | Wholesale & retail | 2019 |
| Partout Consulting Limited | Professional & scientific | 2008 |
| PAS Advisory Partners Limited | Professional & scientific | 2022 |
| Passing Trade Ltd | Information & communication | 2006 |
| Passionate Support Services Ltd | Health & social care | 2015 |
| Pasta Asmarino Food Limited | Manufacturing | 2023 |
| Pastures New Partnership LLP | | 2017 |
| Patchwork Nursery Limited | Education | 2013 |
| Patel & Co. Property Ltd | Real estate | 2024 |
| Path Medical Services Limited | Health & social care | 2025 |
| Pathlight Solutions Limited | Professional & scientific | 2022 |
| Patron Consulting Limited | Education | 2017 |
| Patrykx Ltd | Transport & logistics | 2017 |
| Paul Bayley Interiors Ltd | Construction | 2012 |
| Paul Cloutman Ltd | Professional & scientific | 2010 |
| Paul Martin Consulting Limited | Professional & scientific | 2016 |
| Paul Monk Limited | Professional & scientific | 2014 |
| Pavcore Limited | Administrative & support | 2026 |
| Pawelautos Ltd | Wholesale & retail | 2025 |
| Paws of Perfection Limited | Other services | 2017 |
| Paws on Yoga Ltd | Arts & recreation | 2022 |
| PAX Scrubs Limited | Wholesale & retail | 2022 |
| PAY PER Pulse Ltd | Professional & scientific | 2013 |
| Payriva IT Solutions Ltd | Information & communication | 2020 |
| PBE Axell ADX Limited | Manufacturing | 2026 |
| PBE Axell Holdings Ltd | Financial services | 2026 |
| PBE Europe Limited | Mining & quarrying | 2012 |
| PBE Group Ltd | Other services | 2017 |
| PBE P&S Infrastructure Europe Ltd | Mining & quarrying | 2026 |
| PBE Power Ltd | Financial services | 2026 |
| PC Clinical Services Limited | Health & social care | 2010 |
| Pcls Training Limited | Information & communication | 2009 |
| PD Tennis Ltd | Arts & recreation | 2007 |
| PDH Construction Limited | Construction | 2014 |
| PDK Property Ltd | Construction | 2023 |
| PDM Group Limited | Professional & scientific | 2003 |
| PDT Softwoods Limited | Wholesale & retail | 2021 |
| Peach Capital Ltd | Professional & scientific | 2025 |
| Peach Construction Ltd | Construction | 2026 |
| Peach Development (Tetney) Ltd | Real estate | 2023 |
| Peach Development Group Ltd | Real estate | 2025 |
| Peach Investment Group Ltd | Professional & scientific | 2023 |
| Peachy Project Management Ltd | Professional & scientific | 2024 |
| Peaky Finders Limited | Real estate | 2018 |
| Pearce Autos Limited | Wholesale & retail | 2007 |
| Pearce Property Renovations Ltd | Construction | 2024 |
| Pearlbeck Limited | Construction | 1984 |
| Pearmund Consultancy Ltd | Information & communication | 2024 |
| Pedal Taiwan Limited | Administrative & support | 2017 |
| Peerless Projects Ltd | Information & communication | 2023 |
| Peers Learning Limited | Information & communication | 2025 |
| Pegasus Laboratories UK Limited | Professional & scientific | 2008 |
| Peirce & Co Limited | Professional & scientific | 2012 |
| Peleton Media Limited | Information & communication | 2014 |
| Pembroke Gate (Maidenhead) Management Company Limited | Households | 2008 |
| Pembrokeshire Staycations Limited | Real estate | 2021 |
| Pencrete Limited | Professional & scientific | 1920 |