| Pastel Service Limited | Transport & logistics | 2012 |
| Pastnpresents Ltd | Other services | 2019 |
| Pastspeed Limited | Manufacturing | 1920 |
| PAT Clague Ltd | Real estate | 2024 |
| Patchbay Media Limited | Information & communication | 2023 |
| Patel's Novelty Ltd | Wholesale & retail | 2022 |
| Pathway Pioneers Ltd | Information & communication | 2024 |
| Pathway's LDN Ltd | Administrative & support | 2016 |
| Patiala Services Ltd | Transport & logistics | 2018 |
| Patrichot Property Development and Services Ltd | Real estate | 2019 |
| Patrick Clancy Limited | Professional & scientific | 2024 |
| Patrick Rogers Services Limited | Construction | 2022 |
| Patronklub Limited | Wholesale & retail | 2021 |
| PATZ003 Limited | Information & communication | 2013 |
| Paul Buckley Engineering Services Limited | Construction | 2017 |
| Paul Cook Securities Limited | Real estate | 1971 |
| Paul James Knight Ltd | Health & social care | 2022 |
| Pavilion Garments Limited | Wholesale & retail | 2024 |
| PAW Admin Services Ltd | Administrative & support | 2023 |
| PAW Hub Limited | Wholesale & retail | 2022 |
| Pawfect Retreat 4 U Ltd | Other services | 2025 |
| Paws Free Limited | Other services | 2026 |
| Payday Loans Ltd | Financial services | 2020 |
| Payj Holdings Ltd | Real estate | 2018 |
| Paytriot Capital Ltd | Construction | 2019 |
| Paytriot Ltd | Financial services | 2015 |
| PB 08 AS Ltd | Transport & logistics | 2026 |
| PB Building Maintenance Ltd | Construction | 2021 |
| PB Controls Ltd | Financial services | 2025 |
| PB Glaze Ltd | Wholesale & retail | 2025 |
| PB07 Chohan Contractors Ltd | Construction | 2026 |
| PBS Services Ltd | Construction | 2020 |
| PBT Social Care Ltd | Health & social care | 2010 |
| Pbviking Construction Ltd | Construction | 2015 |
| PC Scenic Painting Limited | Construction | 2019 |
| PCC Electrical Services Ltd | Construction | 2016 |
| PCL Construction Limited | Construction | 2022 |
| PCL Pump Services Ltd | Wholesale & retail | 2023 |
| PCS Hayes Limited | Wholesale & retail | 2003 |
| PDC Brands UK Limited | Other services | 2016 |
| Pdi(Uk) Limited | Real estate | 2022 |
| PDM Contracts Limited | Construction | 2026 |
| PDP Properties Ltd | Real estate | 2025 |
| PDS Estate Ltd | Real estate | 2022 |
| PDU (UK) Limited | Wholesale & retail | 2006 |
| Peace Star Beauty Limited | Other services | 2017 |
| Peachtree Support Services Ltd | Health & social care | 2025 |
| Peacock Film Production Company Ltd | Information & communication | 2020 |
| Peak Creations Ltd | Information & communication | 2026 |
| Pearl Harbour Residentials Limited | Real estate | 2023 |
| Pearlverse Foundation CIC | Education | 2026 |
| Pearlverse Ltd | Professional & scientific | 2026 |
| Pearplum Ltd | Wholesale & retail | 2025 |
| Pebble Cove Ltd | Real estate | 2024 |
| Peepaltree Safety and Risk Consultancy Limited | Administrative & support | 2012 |
| Pegasus Utility Group Ltd | Construction | 2018 |
| Pegazus International Holdings Limited | Professional & scientific | 2024 |
| Pehal Marquee Lining Ltd | Manufacturing | 2024 |
| Pehli Ltd | Wholesale & retail | 2024 |
| Pellazgo Limited | Real estate | 2021 |
| Pembroke Court (Harpenden) Management Company Limited | Households | 2015 |
| Penasul UK Limited | Manufacturing | 2003 |
| Peninsula Healthcare (UK) Limited | Professional & scientific | 2014 |
| Penn House (Herts) Residents Limited | Real estate | 1999 |
| Penn Place (Rickmansworth) RTM Company Ltd | Households | 2012 |
| Penny Lein Property Management Ltd | Real estate | 2016 |
| Pentalux Ltd | Wholesale & retail | 2022 |
| PEO Enterprises Ltd | Wholesale & retail | 2025 |
| People Bakery Ltd | Hospitality | 2020 |
| People Like ME Ltd | Professional & scientific | 2022 |
| People Source Consulting Limited | Administrative & support | 2002 |
| People Source Limited | Administrative & support | 2009 |
| Pepper (UK) Limited | Financial services | 2008 |
| Pepper Advantage Asian Holdco Limited | Financial services | 2019 |
| Pepper Advantage Credit Access Holdco Limited | Financial services | 2026 |
| Pepper Advantage Limited | Financial services | 2008 |
| Pepper Advantage Management Limited | Professional & scientific | 2021 |
| Pepper Advantage Tech NO1 Limited | Financial services | 2023 |
| Pepper Advantage Technologies Limited | Financial services | 2021 |
| Pepper Spice Ltd | Hospitality | 2026 |
| Peregrine Impex Ltd | Wholesale & retail | 2025 |
| Peregrine Sourcing (UK) Limited | Information & communication | 2020 |
| Perfect Bite Ltd | Wholesale & retail | 2019 |
| Perfect Chef Ltd | Hospitality | 2020 |
| Perfect TEN Skincare Ltd | Wholesale & retail | 2022 |
| Peri Peri Village Ltd | Extraterritorial | 2024 |
| Perpetual Healthcare Limited | Health & social care | 2008 |
| Persian Carpet Wharf Limited | Professional & scientific | 1971 |
| Persian Palace Limited | Hospitality | 2009 |
| Pestgone Environmental Ltd | Other services | 2016 |
| Pet's Playground Ltd | Wholesale & retail | 2021 |
| Petidea Ltd | Professional & scientific | 2025 |
| Petman Limited | Transport & logistics | 2024 |
| Petre’S Arrows Ltd | Wholesale & retail | 2018 |
| Pets Approve Limited | Wholesale & retail | 2020 |
| Pewter N7 Management Company Limited | Real estate | 2017 |
| Pfam Properties Limited | Construction | 2025 |
| PFU (Emea) Limited | Wholesale & retail | 1981 |
| PGM Transport Ltd | Transport & logistics | 2020 |
| PGS Homes Limited | Real estate | 2024 |