| Playful Presence Ltd | Education | 2019 |
| Plebeian Research Limited | Information & communication | 2025 |
| Plenum Group Limited | Information & communication | 2026 |
| Pley Ltd | Construction | 2023 |
| PLK Marylebone Ltd | Professional & scientific | 2022 |
| PLL Ltd | Real estate | 2018 |
| PLL Services Ltd | Construction | 2023 |
| Ploy Consulting Limited | Administrative & support | 2020 |
| PLR Management Limited | Professional & scientific | 2017 |
| Plumb Suite Ltd | Construction | 2024 |
| Plus 974 Limited | Real estate | 2025 |
| Plusmark Ltd | Administrative & support | 2023 |
| PM Property North Ltd | Construction | 2025 |
| PME Consulting Ltd. | Professional & scientific | 2016 |
| PNP18 Limited | Other services | 2019 |
| PNT Holdings Limited | Real estate | 2002 |
| PO Thoroughbreds Ltd | Agriculture & fishing | 2024 |
| Pocketwatch and Petticoats Ltd | Wholesale & retail | 2026 |
| POD Mike Ltd | Wholesale & retail | 2025 |
| POD to PEA Doula Services Limited | Health & social care | 2024 |
| Podium by Design Ltd | Construction | 2021 |
| Podium Lettings Ltd | Real estate | 2021 |
| Podium Plumbing Ltd | Construction | 2021 |
| Podmore Investments Ltd | Financial services | 2024 |
| Point Louise Forward Racing Limited | Arts & recreation | 2020 |
| Point Science Analytics Ltd | Professional & scientific | 2022 |
| Point Source Investigative Journalism Limited | Administrative & support | 2025 |
| Pointe and Beam Ltd | Construction | 2026 |
| Pointillist Ltd | Information & communication | 2020 |
| Pointon Property Limited | Real estate | 2017 |
| Pointrock Limited | Professional & scientific | 2025 |
| Poison Media Productions Limited | Manufacturing | 2023 |
| Poke Protect Limited | Wholesale & retail | 2026 |
| Poker Face Beauty Ltd | Other services | 2024 |
| Polari Leisure Limited | Hospitality | 2019 |
| Polaris Parks Ltd | Real estate | 2025 |
| Polarity Alchemist Ltd | Professional & scientific | 2025 |
| Polders Pigs Limited | Agriculture & fishing | 2024 |
| Poldora Ltd | Wholesale & retail | 2023 |
| Pole Group Ltd | Financial services | 2017 |
| Pole Position Art Limited | Arts & recreation | 2025 |
| Polestar Drivers Club Ltd | Other services | 2026 |
| Polgar Property Solutions Ltd | Professional & scientific | 2025 |
| Policyukmedia Ltd | Information & communication | 2025 |
| Polish 2015 Limited | Administrative & support | 2015 |
| Polr Ltd | Information & communication | 2022 |
| Polski Vanlife Ltd | Hospitality | 2025 |
| Polspark Ltd | Construction | 2018 |
| Poly Artists Agency Ltd | Arts & recreation | 2021 |
| Polygraph Science Ltd | Professional & scientific | 2023 |
| Polytopos Ltd | Real estate | 2024 |
| Pommes and Butlers Limited | Hospitality | 2025 |
| Pommodoro Express Ltd | Hospitality | 2025 |
| Pommodoro Kitchen Ltd | Hospitality | 2025 |
| Pontente UK Ltd | Professional & scientific | 2024 |
| Pontis Partner Ltd | Information & communication | 2025 |
| Pooshaq Ltd | Wholesale & retail | 2022 |
| POP Luxe Ltd | Administrative & support | 2024 |
| Popana Cleaning Ltd | Administrative & support | 2023 |
| Popok Services Ltd | Transport & logistics | 2019 |
| Popping Pizza (Coventry) Ltd | Hospitality | 2019 |
| Popsytec Limited | Information & communication | 2026 |
| Popula Solution Ltd | Professional & scientific | 2026 |
| Popupblooms.Com Ltd | Wholesale & retail | 2020 |
| Popworks Design Limited | Other services | 2017 |
| Popworks Limited | Other services | 2005 |
| Popworks Manufacturing Limited | Other services | 2023 |
| Porchex Ltd | Information & communication | 2024 |
| Pororoca Limited | Information & communication | 2021 |
| Portal Design and Print Co Ltd | Wholesale & retail | 2024 |
| Portal Games Limited | Wholesale & retail | 2007 |
| Portaquarters Group Ltd | Manufacturing | 2021 |
| Portcullis Holdings Limited | Professional & scientific | 2013 |
| Porter Assets Limited | Real estate | 2025 |
| Porter Family Property Holdings Limited | Real estate | 2022 |
| Porter Lettings Ltd | Real estate | 2025 |
| Portfolio AI Ltd | Information & communication | 2024 |
| Portico AS Ltd | Construction | 2019 |
| Portico GB Limited | Construction | 2000 |
| Portico HS Ltd | Financial services | 2026 |
| Portico TTA Limited | Construction | 2021 |
| Porto Support Services Limited | Professional & scientific | 2022 |
| Portugal Dreams Ltd | Wholesale & retail | 2024 |
| Posh Electrical Services Ltd | Construction | 2019 |
| Posh Play Soft Play Ltd | Administrative & support | 2024 |
| Posh Tunnel Limited | Information & communication | 2025 |
| Poshu Software Solutions Ltd | Information & communication | 2018 |
| Positive Steps Fitness and Wellbeing Ltd | Arts & recreation | 2018 |
| Post Urban Holdings Limited | Financial services | 2023 |
| Post Urban IP Limited | Administrative & support | 2024 |
| Post Urban Services Limited | Professional & scientific | 2023 |
| Post Urban Ultimate Holding Limited | Financial services | 2024 |
| Post-Excavation and Archaeological Archive Services LLP | | 2025 |
| Postagrid Limited | Professional & scientific | 2021 |
| Posteni Limited | Professional & scientific | 2021 |
| Potash Farm Services Limited | Agriculture & fishing | 2014 |
| Poundawebsite Ltd | Information & communication | 2021 |
| Poundpal Retail Group Ltd | Wholesale & retail | 2024 |
| Powder Sky Limited | Information & communication | 2015 |
| Power Engineering Group Limited | Financial services | 2022 |