| Pitaron Box Ltd | Construction | 2018 |
| Pitbel Constructions Limited | Construction | 2021 |
| Pizza & Wings Leyton Limited | Hospitality | 2024 |
| Pizza Chicago Ltd | Hospitality | 2025 |
| Pizza Hack Limited | Hospitality | 2024 |
| Pizzaport Ltd | Hospitality | 2025 |
| Pizzey Porritt Partnership Limited | Health & social care | 2003 |
| PJ Bengal Ltd | Hospitality | 2024 |
| PJ Brighton Ltd | Hospitality | 2024 |
| PJ Burgess Hill Ltd | Hospitality | 2024 |
| PJ Hove Ltd | Hospitality | 2024 |
| PJ Kingston Hill Limited | Manufacturing | 2016 |
| PJ Lewes Ltd | Hospitality | 2024 |
| PJ South Coast Limited | Hospitality | 2018 |
| Pkdj Sales Limited | Wholesale & retail | 2017 |
| PL Stefan Ltd | Transport & logistics | 2015 |
| Planet Cargo Limited | Other services | 2014 |
| Planoak Limited | Hospitality | 1995 |
| Plastic Pacific Limited | Administrative & support | 2017 |
| Plate Exchange Ltd | Wholesale & retail | 2025 |
| PLATINUM3 Solutions Ltd | Other services | 2024 |
| Playgolf London Limited | Arts & recreation | 2009 |
| PLC Estate Management Ltd | Households | 2025 |
| Pledger Design Limited | Professional & scientific | 2009 |
| Plentex Limited | Construction | 1943 |
| PLT Catering Ltd | Hospitality | 2022 |
| Plum Studios Ltd | Wholesale & retail | 2020 |
| PLUMBHEAT4YOU Ltd | Construction | 2016 |
| Plumbline Building Contracts Limited | Real estate | 1990 |
| Plumbwise Limited | Wholesale & retail | 2023 |
| Plus Food Limited | Wholesale & retail | 2017 |
| Plush PAD Limited | Real estate | 2023 |
| PM GSD Limited | Real estate | 2023 |
| PMI London Ltd | Health & social care | 2015 |
| PN Solutions Limited | Real estate | 2007 |
| Pn&T Ltd | Real estate | 2025 |
| Pnnd Properties Ltd | Real estate | 2019 |
| PNS Globex Ltd | Wholesale & retail | 2024 |
| PNT Productions Limited | Administrative & support | 2023 |
| POC Fast Resort Limited | Administrative & support | 2014 |
| Pocket Burgers Limited | Hospitality | 2025 |
| Poindus Systems UK Limited | Wholesale & retail | 2015 |
| Pokebrit Ltd | Wholesale & retail | 2018 |
| Pokecardhub Ltd | Wholesale & retail | 2025 |
| Pokepabb Ltd | Wholesale & retail | 2026 |
| POL Catering Ltd | Hospitality | 2025 |
| Polana Limited | Hospitality | 2019 |
| Polar Estates Ltd | Real estate | 2024 |
| Polar Property Group Limited | Real estate | 2019 |
| Polforth Limited | Professional & scientific | 2025 |
| Policy Ninja Ltd | Information & communication | 2018 |
| Polstar Accountants Office Ltd | Professional & scientific | 2013 |
| Polstar VIP Ltd | Professional & scientific | 2016 |
| POM Estates Ltd | Real estate | 2025 |
| POM First Ltd | Real estate | 2025 |
| Ponpon Limited | Professional & scientific | 2012 |
| Ponwick Limited | Professional & scientific | 2026 |
| POP Pizza Hayes Ltd | Hospitality | 2019 |
| POPE26 Limited | Construction | 2023 |
| Popescu Trans Ltd | Transport & logistics | 2016 |
| Poppie House Ltd | Real estate | 2013 |
| Pops Fashion Ltd | Wholesale & retail | 2018 |
| Popular Pizza & Burger Ltd | Hospitality | 2024 |
| Porter Plant Ltd | Water & waste | 2021 |
| Porto Sole Ltd | Extraterritorial | 2010 |
| Portsea Investments Limited | Real estate | 2014 |
| Portslide Limited | Professional & scientific | 2020 |
| Portsmouth Pest Control Limited | Administrative & support | 2025 |
| Posh Chauffeur Hire Limited | Transport & logistics | 2016 |
| Posh Garage Ltd | Wholesale & retail | 2019 |
| Position Blue Ltd | Real estate | 2025 |
| Positive Promo Ltd | Education | 2022 |
| Post Street Art Limited | Arts & recreation | 2017 |
| Postdrop Limited | Financial services | 2026 |
| Pound Plus City Ltd | Wholesale & retail | 2024 |
| Pound Volt Ltd | Wholesale & retail | 2024 |
| Pounds and Pence Ltd | Professional & scientific | 2016 |
| Pour DE Musk Limited | Wholesale & retail | 2020 |
| Poussin Plaice Limited | Hospitality | 2008 |
| POW That Ltd | Wholesale & retail | 2019 |
| Powah Trading Ltd | Manufacturing | 2025 |
| Powell AAP Ltd | Construction | 2024 |
| Power Swan Limited | Administrative & support | 2025 |
| Powerful Thoughts Limited | Information & communication | 2022 |
| Powertek Ventures Limited | Health & social care | 2018 |
| PP Family Office Limited | Professional & scientific | 2017 |
| PP Laundry Ltd | Other services | 2024 |
| PP Plumbing Ltd | Construction | 2019 |
| PPE Import Solutions Ltd | Wholesale & retail | 2015 |
| PPM London Limited | Real estate | 2023 |
| Ppsafe Limited | Wholesale & retail | 2020 |
| PR & Advertising Limited | Transport & logistics | 2020 |
| PR Electric Solutions Ltd | Construction | 2024 |
| PR Foods & Beverages Ltd | Wholesale & retail | 2025 |
| PR Osteopath Limited | Health & social care | 2016 |
| PR Search Ltd | Administrative & support | 2015 |
| Pr&D Services Ltd | Administrative & support | 2024 |
| Practical Legal Support Limited | Professional & scientific | 2017 |
| Practicepractice Ltd | Information & communication | 2025 |
| Pragma Investments Limited | Real estate | 2018 |