| Pet Detective Worldwide Training Ltd | Education | 2024 |
| Pet Universe Grooming Salon Limited | Other services | 2023 |
| PET24 Limited | Wholesale & retail | 2025 |
| Petal & PAW Ltd | Wholesale & retail | 2026 |
| Petals Care S L Limited | Wholesale & retail | 2020 |
| Peter Steel Fixing Ltd | Construction | 2018 |
| Petersons & Co Ltd | Professional & scientific | 2011 |
| Petersons Real Estate Holdings Ltd | Real estate | 2022 |
| Petguardrx Ltd | Wholesale & retail | 2025 |
| Petite Bouchees Limited | Hospitality | 2022 |
| Petiworld Ltd | Wholesale & retail | 2025 |
| Petkov Building Services Ltd | Construction | 2013 |
| Petrov Holding Ltd | Wholesale & retail | 2020 |
| Petrov Limited | Transport & logistics | 2015 |
| Petru 10 Construct Ltd | Construction | 2020 |
| Petshieldrx Ltd | Wholesale & retail | 2026 |
| Pettex Aquatics Limited | Wholesale & retail | 2000 |
| Pettex Commercial Limited | Financial services | 2023 |
| Pettex Topco Limited | Financial services | 2023 |
| PEX Homes Limited | Real estate | 2023 |
| Pexel Services Ltd | Information & communication | 2017 |
| PFM Care Ltd | Real estate | 2021 |
| PG Elec Ltd | Construction | 2025 |
| PGB Construction Ltd | Construction | 2026 |
| PGB Property Investments Ltd | Real estate | 2026 |
| Pgpl Solutions Limited | Wholesale & retail | 2024 |
| PGR Paint Finishes Limited | Administrative & support | 2009 |
| PH Home Designs and Build Ltd | Construction | 2024 |
| PH Wholesale Limited | Wholesale & retail | 2023 |
| Phal Properties Limited | Real estate | 2019 |
| Phalwan Records Ltd | Information & communication | 2024 |
| Pharma Imports Ltd | Health & social care | 2021 |
| Pharmacall Limited | Health & social care | 2010 |
| Pharmadocs(Uk) Limited | Health & social care | 2018 |
| Pharmak Limited | Health & social care | 2017 |
| Pharmalinc Ltd | Health & social care | 2011 |
| PHARMASIA8 Limited | Health & social care | 2012 |
| Pharmaster Ltd | Health & social care | 2017 |
| Pharmasya Limited | Health & social care | 2019 |
| Pharmex Holdings Limited | Health & social care | 2023 |
| Pharmust Limited | Health & social care | 2020 |
| Phase Records DNB Limited | Manufacturing | 2022 |
| Phat Sweetz Limited | Hospitality | 2026 |
| Phatfood Ilford Ltd | Hospitality | 2026 |
| PHB Healthcare Solutions Limited | Health & social care | 2024 |
| Phenyo Russell Scenery Limited | Arts & recreation | 2024 |
| Phieban QUN Limited | Wholesale & retail | 2025 |
| Phikavit Limited | Real estate | 2019 |
| Phil Mckay Consultants Limited | Construction | 2014 |
| Philgudenterprise Ltd | Administrative & support | 2021 |
| Philip Trading Company Limited | Wholesale & retail | 2006 |
| Philip Whelton Limited | Construction | 2007 |
| Philoso Ltd | Professional & scientific | 2023 |
| Phinder Construction Ltd | Construction | 2025 |
| Phiromar Ltd | Real estate | 2019 |
| Phlex Investments Limited | Real estate | 2001 |
| Phlex Properties Ltd | Real estate | 2014 |
| PHO Saigon Limited | Hospitality | 2015 |
| Phoenix Care Home Services Limited | Health & social care | 2008 |
| Phoenix CARE4U Ltd | Health & social care | 2022 |
| Phoenix CRT RTM Company Limited | Households | 2025 |
| Phoenix Electrical RS Limited | Construction | 2025 |
| Phoenix Essex Ltd | Real estate | 2024 |
| Phoenix Fire Engineering Ltd | Construction | 2026 |
| Phoenix Medics Ltd | Health & social care | 2008 |
| Phoenix OP Co Ltd | Professional & scientific | 2023 |
| Phoenix Personal Development Ltd | Other services | 2007 |
| Phoenix Property Services UK Ltd | Real estate | 2006 |
| Phoenix Valley Ltd | Real estate | 2020 |
| Phoenixx Group Property Portfolio Ltd | Real estate | 2016 |
| Phoennixai Limited | Information & communication | 2025 |
| Phone Gadget Limited | Wholesale & retail | 2014 |
| Phone Pulse Ltd | Wholesale & retail | 2024 |
| Phone Workshop London Ltd | Wholesale & retail | 2017 |
| Phonetarget Ltd | Wholesale & retail | 2023 |
| Phoniq Limited | Wholesale & retail | 2026 |
| Photodelic Ltd | Professional & scientific | 2024 |
| Photoplusuk Limited | Professional & scientific | 2020 |
| Phreelance Pharma Ltd | Professional & scientific | 2023 |
| PHS Construction Ltd | Construction | 2025 |
| PHS Properties Ltd | Real estate | 2023 |
| PHT Property Development Ltd | Real estate | 2024 |
| Physionshop Ltd | Wholesale & retail | 2022 |
| PI Egerton Investments Limited | Administrative & support | 2018 |
| Pial Protech Ltd | Wholesale & retail | 2022 |
| Picchu Property Ventures Limited | Real estate | 2023 |
| PICK2BUY Ltd | Wholesale & retail | 2023 |
| Pickering and Co. Real Estate Limited | Real estate | 2019 |
| Pickthall Academy Limited | Education | 2025 |
| Pickup Moto Parts Ltd | Wholesale & retail | 2025 |
| Picp Ltd | Other services | 2025 |
| Picture Glass Ltd | Manufacturing | 2023 |
| PID Construction Limited | Construction | 2023 |
| Pierce Properties Ltd | Real estate | 2022 |
| Pierre-Davis Consultancy Ltd | Administrative & support | 2011 |
| Pilastri Fondamenta Consulting UK Limited | Extraterritorial | 2011 |
| Pillar & Forge Construction Ltd | Construction | 2025 |
| Pillar & Porch Housing CIC | Real estate | 2026 |
| Pillar Professional Services Ltd | Professional & scientific | 2026 |
| Pillar Square Limited | Wholesale & retail | 2019 |