| Philanderson Consulting Limited | Information & communication | 2008 |
| Phill's Removals Ltd | Transport & logistics | 2020 |
| Philli Massage UK Ltd | Other services | 2026 |
| Phitology Ltd | Hospitality | 2023 |
| Phoebe Louise Ltd | Health & social care | 2025 |
| Phoenix Global Development Ltd | Construction | 2020 |
| Phoenix Repairs Ltd | Other services | 2025 |
| Phoenix Specialist Window Cleaners Limited | Administrative & support | 2011 |
| Pholly Tech Limited | Information & communication | 2017 |
| Phone R US Limited | Other services | 2017 |
| Phonergizer Limited | Other services | 2014 |
| Phong's Nail Limited | Other services | 2024 |
| Photomart UK Ltd | Wholesale & retail | 2020 |
| Photon Structures LP | | 2019 |
| Phresh Entertainment Ltd | Arts & recreation | 2026 |
| Phrisk Limited | Health & social care | 2005 |
| Physionet Limited | Health & social care | 2008 |
| Physiotherapy Better Health Ltd | Other services | 2025 |
| PIA Stage Paint Limited | Construction | 2022 |
| Piara Ltd | Extraterritorial | 2025 |
| Piazza Italia Ltd | Professional & scientific | 2003 |
| Picha Ltd | Professional & scientific | 2025 |
| Pickerpackertcg Ltd | Wholesale & retail | 2026 |
| Pickhill Auto Breakers Limited | Wholesale & retail | 2025 |
| Pickles and Yeats (Storage and Forwarding) Limited | Extraterritorial | 1985 |
| Picloc Ltd | Information & communication | 2024 |
| Pico Cars Ltd | Wholesale & retail | 2024 |
| Pierides Creative Limited | Other services | 2019 |
| Pieter DU Plessis UK Ltd | Health & social care | 2024 |
| Piku Services Ltd | Construction | 2025 |
| Pillars Legacy Planning LLP | | 2024 |
| Pimemos Ltd | Information & communication | 2024 |
| Pimi Construction Ltd | Construction | 2024 |
| Pinar Kebab 2 Limited | Hospitality | 2019 |
| Pinball Alley UK Limited | Arts & recreation | 2025 |
| Pingu Ltd | Wholesale & retail | 2025 |
| Pink Jackfruit Ltd | Information & communication | 2023 |
| Pink Nails (Felling) Limited | Other services | 2021 |
| Pink Nails Colindale NW9 Limited | Other services | 2023 |
| Pinnacle Building & Repairs Limited | Households | 2025 |
| Pinnacle Design & Building Ltd | Construction | 2023 |
| Pinnacle Whisky Limited | Wholesale & retail | 2025 |
| Pinner Meze Ltd | Hospitality | 2025 |
| Pinoy Work Force Limited | Administrative & support | 2025 |
| Pinsamania Ltd | Hospitality | 2025 |
| PIP Property Limited | Administrative & support | 1959 |
| Pipau Inst Ltd | Construction | 2019 |
| Pipelette Translations Ltd | Professional & scientific | 2015 |
| Pipeline Property Limited | Real estate | 2016 |
| Pire Construction Ltd | Construction | 2021 |
| Pirion Consulting LP | | 2016 |
| Pivota Suppliers Limited | Wholesale & retail | 2025 |
| Pixar PIT Stop Ltd | Wholesale & retail | 2026 |
| Pixible Ltd | Information & communication | 2019 |
| Pizza 2 Go (NN10) Limited | Hospitality | 2016 |
| Pizza Choice SAB Ltd | Hospitality | 2025 |
| Pizza North London Ltd | Hospitality | 2025 |
| Pizza Plus Okehampton Limited | Hospitality | 2023 |
| PJ Emery Ltd | Wholesale & retail | 2022 |
| PJ Faizan Ltd | Hospitality | 2019 |
| PJB Construction Limited | | 1992 |
| PJE Transports Services Ltd | Transport & logistics | 2025 |
| PK GAS Heating Ltd | Construction | 2018 |
| PK Global Alliance Ltd | Financial services | 2025 |
| Pl-Grp Ltd | Construction | 2025 |
| Planet Engineering Limited | Professional & scientific | 2017 |
| Plastering Perfection Limited | Construction | 2025 |
| Platinum Appointments Ltd | Professional & scientific | 2025 |
| Platinum Hair Cuts Ltd | Other services | 2024 |
| Platinum Investment Properties Brentwood Ltd | Real estate | 2025 |
| Platinum Tanning Ltd | Wholesale & retail | 2018 |
| Player Assist Management Ltd | Arts & recreation | 2022 |
| Playwright Limited | Other services | 2015 |
| Plesvale Ltd | Extraterritorial | 2006 |
| Plug'D in Ltd | Information & communication | 2019 |
| Plugd'In Sports Management Ltd | Arts & recreation | 2021 |
| Plumbdon Ltd | Construction | 2021 |
| Plus for Investments Limited | Real estate | 2002 |
| Plus Injections Limited | Wholesale & retail | 2018 |
| Plutus Media Ltd | Other services | 2025 |
| PM Brosnan Limited | Transport & logistics | 2021 |
| PM Clapham Cafe Ltd | Other services | 2026 |
| PM Construct Limited | Construction | 2020 |
| PM Decoration Ltd | Construction | 2025 |
| PMB80 Ltd | Transport & logistics | 2017 |
| PMF Plumbing & Heating Ltd | Construction | 2015 |
| Pmva Training Solutions Limited | Professional & scientific | 2019 |
| PN Management Consultancy Services Ltd | Professional & scientific | 2025 |
| PNK Services Ltd | Construction | 2007 |
| PNR IT Projects UK Ltd | Wholesale & retail | 2022 |
| Poddle Technology Group Limited | Professional & scientific | 2022 |
| Pointonbody Therapy Ltd | Health & social care | 2022 |
| Polat Construction Ltd | Construction | 2026 |
| Poltaxi Ltd | Transport & logistics | 2022 |
| Polus Services Limited | Administrative & support | 2017 |
| Poly DRY Cleaners Ltd | Other services | 2003 |
| Polygreen LLP | | 2013 |
| Ponart Limited | Construction | 2026 |
| Ponders Catering Ltd | Hospitality | 2013 |
| Ponders Delight Limited | Hospitality | 2025 |