| Perfect Shot Media Ltd | Information & communication | 2016 |
| Perfect Solid Delivery Ltd | Transport & logistics | 2024 |
| Perfectio Ltd | Arts & recreation | 2010 |
| Perform Worldwide Ltd | Transport & logistics | 2014 |
| Performa Physiotherapy Ltd | Education | 2021 |
| Perfume & Beauty Limited | Wholesale & retail | 2017 |
| Peri Peri Chicken OP Ltd | Hospitality | 2024 |
| Peri Peri Cippenham Limited | Hospitality | 2019 |
| Peri Peri Grill Slough Limited | Hospitality | 2023 |
| Peri Peri Special Ltd | Hospitality | 2024 |
| Perkier Foods Limited | Manufacturing | 2012 |
| Perkins Foods Holdings Limited | Administrative & support | 2000 |
| Perkins Foods International (UK) Limited | Professional & scientific | 1989 |
| Perkins Foods Limited | Professional & scientific | 1985 |
| Perkins Incorporated Limited | Manufacturing | 2015 |
| Perm Teachers Ltd | Administrative & support | 2019 |
| Perpetual Succour Ltd | Hospitality | 2019 |
| Persistent Technologies Ltd | Information & communication | 2016 |
| Person Centred Home Care Ltd | Public administration | 2019 |
| Personal Assistant Service Limited | Health & social care | 2023 |
| Peruvian Street Food Ltd | Hospitality | 2026 |
| PES Logistics Ltd | Transport & logistics | 2018 |
| Peshawar Zaiqa Ltd | Hospitality | 2024 |
| Pest Dominion Limited | Administrative & support | 2020 |
| Pest TL Ltd | Transport & logistics | 2016 |
| Pet Instincts Ltd | Professional & scientific | 2019 |
| Peter Amrit Limited | Real estate | 2021 |
| Peter Building Services Ltd | Construction | 2017 |
| Petree Garden Service Ltd | Administrative & support | 2021 |
| Pets Care Store Ltd | Wholesale & retail | 2023 |
| Petswise.Com Ltd | Wholesale & retail | 2024 |
| Petvitae Labore Ltd | Manufacturing | 2024 |
| Pewe Ltd | Information & communication | 2025 |
| PF Doors Ltd | Public administration | 2023 |
| PFP Managed Services Ltd | Real estate | 2025 |
| Pftc Limited | Health & social care | 2015 |
| PG Screeding Ltd | Construction | 2025 |
| PGA Homes Limited | Real estate | 2024 |
| PGB Homes Ltd | Real estate | 2019 |
| PGM (Berks) Limited | Administrative & support | 2015 |
| Pharm Planet Holdings Limited | Financial services | 2024 |
| Pharma and Safety Solutions Ltd | Health & social care | 2021 |
| Pharma Medical Solutions Ltd | Professional & scientific | 2020 |
| Pharma Services (PS) Ltd | Wholesale & retail | 2025 |
| Pharmaco Regulatory Services Limited | Professional & scientific | 2012 |
| Pharmacy in the Post Ltd | Wholesale & retail | 2022 |
| Pharmacy Planet Limited | Wholesale & retail | 2023 |
| Pharmadox Limited | Professional & scientific | 2020 |
| Pharmalab Limited | Wholesale & retail | 1986 |
| Pharmanity Limited | Professional & scientific | 2018 |
| Pharmasaif Ltd | Professional & scientific | 2020 |
| Phatb Ltd | Construction | 2026 |
| PHE DOM Services Ltd | Construction | 2019 |
| PHE Domestic Services Ltd | Construction | 2018 |
| PHE Services Ltd | Construction | 2016 |
| Pheonix IT Solutions Ltd | Information & communication | 2022 |
| Phi-Tec Consultancy Limited | Information & communication | 2014 |
| Philadelphia Global Limited | Wholesale & retail | 2024 |
| Philgo Care Limited | Health & social care | 2014 |
| Philip Energy Cleaning Limited | Administrative & support | 2017 |
| Philm Investments Private Limited | Health & social care | 2017 |
| Philo IT Solutions Limited | Information & communication | 2022 |
| Phinehas Consulting Ltd | Other services | 2012 |
| Phob Limited | Manufacturing | 2025 |
| Phobiagone Limited | Extraterritorial | 2009 |
| Phoenix & Co UK Limited | Real estate | 2026 |
| Phoenix CARE247 Ltd | Administrative & support | 2024 |
| Phoenix Commerce Limited | Wholesale & retail | 2023 |
| Phoenix Freight Services Ltd | Transport & logistics | 2023 |
| Phoenix Mart Limited | Wholesale & retail | 2019 |
| Phoenix Properties Investments UK Ltd | Real estate | 2026 |
| Phoenix PVT Ltd | Transport & logistics | 2016 |
| Phoenix R&D Solutions Limited | Professional & scientific | 2022 |
| Phoenix Remedy Ltd | Education | 2025 |
| Phoenix Services (London) Ltd | Construction | 2022 |
| Phoenixstead Properties Ltd | Real estate | 2025 |
| Phone 4 FIX Ltd | Wholesale & retail | 2020 |
| Phone Home Ltd | Wholesale & retail | 2021 |
| Phone Hub Ltd | Wholesale & retail | 2022 |
| Phone Recovery Limited | Other services | 2021 |
| PHTWENTY8 Ltd | Real estate | 2022 |
| Phull Story Limited | Information & communication | 2018 |
| Physio-Med Clinic Ltd Ltd | Other services | 2017 |
| PI Electronics Ltd | Other services | 2019 |
| PI Square Technologies UK PVT Ltd | Information & communication | 2023 |
| Piccadilly Accountants Ltd | Professional & scientific | 2024 |
| Pick and Drop Removals Ltd | Transport & logistics | 2025 |
| Pickadoo Wholesale Limited | Wholesale & retail | 2022 |
| Pickle JAR Communications Limited | Other services | 2007 |
| Picklelicious Organic UK Limited | Wholesale & retail | 2024 |
| Picksair Limited | Professional & scientific | 2024 |
| Pidgintown Limited | Hospitality | 2015 |
| Piekarski Ltd | Transport & logistics | 2020 |
| Piercing Mania Ltd | Wholesale & retail | 2026 |
| PIK PIK POW Limited | Professional & scientific | 2023 |
| Piktree Ltd. | Information & communication | 2012 |
| PIL Admin Limited | Wholesale & retail | 1984 |
| Pilates With Gurpreet Limited | Arts & recreation | 2026 |
| Pill Box Chemists Limited | Health & social care | 1999 |
| Pillaro Ltd | Construction | 2025 |