| Patient Zone Ltd | Information & communication | 2017 |
| Patrick & Erick Trans Ltd | Construction | 2019 |
| Paul Allen Film Cars Limited | Transport & logistics | 2013 |
| Paul Angell Ltd | Transport & logistics | 2022 |
| Paul Blayney Design Limited | Professional & scientific | 2019 |
| Paul Carter Properties Ltd | Real estate | 2022 |
| Paul Consulting Limited | Real estate | 2008 |
| Paul J Jardine Engineering Consultancy Limited | Professional & scientific | 2007 |
| Paul Mckenzie Consultancy Limited | Professional & scientific | 2007 |
| Paun D Limited | Transport & logistics | 2015 |
| Pavilion Gardens Sevenoaks Limited | Households | 2011 |
| Pavizham Agro Foods UK Limited | Manufacturing | 2023 |
| Pawsome Vitality Limited | Manufacturing | 2025 |
| PAX Romana Limited | Real estate | 2023 |
| Paxa Propertys Ltd | Real estate | 2022 |
| Paxford Properties Limited | Real estate | 2011 |
| Payet Limited | Real estate | 2021 |
| Paying IT Forward Ltd | Other services | 2020 |
| Payinless Property Management Limited | Real estate | 2023 |
| Payperchase Solutions Ltd Limited | Information & communication | 2015 |
| Paywise Consulting Ltd | Professional & scientific | 2020 |
| PB Holdings (ST Albans) Limited | Financial services | 2022 |
| PB Productions Ltd | Information & communication | 2026 |
| Pbmb Holdings Ltd | Professional & scientific | 2024 |
| PC & AD Developments Limited | Real estate | 2015 |
| PCJ Services (Herts) Ltd | Water & waste | 2016 |
| PCK Electrical Limited | Construction | 2016 |
| PCM Travels UK Ltd | Administrative & support | 2015 |
| PE and C Ltd | Hospitality | 2016 |
| Peaceable Habitation Limited | Health & social care | 2014 |
| Peach Brickwork Ltd | Construction | 2025 |
| Peacock & Dove Hotels Limited | Hospitality | 2004 |
| Peacock Tree Consultancy Ltd | Professional & scientific | 2018 |
| Peaky Builders Ltd | Construction | 2024 |
| Peaq App Ltd | Information & communication | 2026 |
| Pear Tree Apartments Residents Management Company Limited | Households | 2023 |
| Pear Tree Court Midsummer Meadow Management Company Limited | Households | 2025 |
| Pearl Creative Ltd | Administrative & support | 2020 |
| Pearl Youngston Limited | Information & communication | 2010 |
| Peartree Freeholders Limited | Households | 2020 |
| Pebble Beach (Seaton) Management Company Limited | Households | 2014 |
| Pebble BTL Ltd | Real estate | 2024 |
| Peber Limited | Manufacturing | 2023 |
| Pecs Holdings Ltd | Professional & scientific | 2024 |
| Pecs Investments Ltd | Real estate | 2024 |
| Pecunia Maior Ltd | Wholesale & retail | 2022 |
| Pedal Back Ltd | Other services | 2014 |
| Pedal FUN and Solar Cooking ALL CIC | Transport & logistics | 2025 |
| Peek Property Ltd | Hospitality | 2026 |
| Peekaboo House Nursery Ltd | Health & social care | 2025 |
| Peer Properties UK Limited | Construction | 2022 |
| PEER2PEER DPI Ltd | Professional & scientific | 2012 |
| Peko Equipment Limited | Professional & scientific | 1985 |
| Peloton Publishing Ltd | Information & communication | 2010 |
| Pembridge Consulting Ltd | Professional & scientific | 2022 |
| Pendley Homes Ltd | Real estate | 2021 |
| Penmarlam Limited | Arts & recreation | 2020 |
| Penn Biosciences Ltd | Professional & scientific | 2016 |
| Penn Hill Gardens (Exeter) Management Company Limited | Households | 2019 |
| Pennine Pneumatic Services Limited | Wholesale & retail | 1991 |
| Pennlands Limited | Households | 2013 |
| Penticost & Associates Ltd | Professional & scientific | 2010 |
| Pentref Llewelyn (Penllergaer) Management Company Limited | Households | 2023 |
| Peony & Magnolia Limited | Administrative & support | 2019 |
| People Building Limited | Administrative & support | 2009 |
| People Person Pictures Limited | Information & communication | 2020 |
| People Personnel Ltd | Administrative & support | 2008 |
| Peppermint Recruitment Limited | Administrative & support | 2012 |
| Pepperose Limited | Administrative & support | 2007 |
| Perdens Ltd | Wholesale & retail | 2020 |
| Perendes AI Ltd | Wholesale & retail | 2025 |
| Perfect Beauty Salon Limited | Other services | 2022 |
| Peri Peri LAB Ltd | Hospitality | 2026 |
| Perivoli Investments Limited | Administrative & support | 2011 |
| Perpetua Homecare Ltd | Health & social care | 2026 |
| Perpetual Remembrances Ltd | Wholesale & retail | 2023 |
| Perrito Media Ltd | Information & communication | 2013 |
| Personal Upgrades Limited | Information & communication | 2017 |
| Perum Group Ltd | Real estate | 2020 |
| Perum Property Ltd | Real estate | 2022 |
| Pesch Property Development (PPD) Ltd | Construction | 2019 |
| Pet Relief Home Care Limited | Other services | 2014 |
| Pet Relief Limited | Other services | 2003 |
| Petals the Professional Cleaners Ltd | Administrative & support | 2026 |
| Peters IT Consultancy Limited | Information & communication | 2024 |
| Peterson Pharma Ltd | Professional & scientific | 2020 |
| Petitt Properties Ltd | Real estate | 2025 |
| Petkov Ltd | Construction | 2013 |
| Petrina Logistic Ltd | Transport & logistics | 2022 |
| Petru Adrian Ltd | Construction | 2019 |
| PF Financial Ltd | Financial services | 2007 |
| PFS Training Consultancy Ltd | Administrative & support | 2013 |
| PG Property Investment London Ltd | Real estate | 2019 |
| PGF Transport & Delivery Limited | Transport & logistics | 2017 |
| Pggproperty Ltd | Real estate | 2026 |
| PH Plastering Ltd | Construction | 2018 |
| PH Signalling Installations Ltd | Construction | 2009 |
| Pharmtopia Consulting Ltd | Information & communication | 2015 |
| Pheobe C.I.C. | Hospitality | 2019 |
| Pher Import Ltd | Wholesale & retail | 2017 |