| Perspective Property Group Ltd | Financial services | 2024 |
| Perwaz Global Limited | Extraterritorial | 2024 |
| Pessoll Estates Limited | Real estate | 2025 |
| Pestl Embedded Ltd | Information & communication | 2025 |
| Pestway Services Ltd | Administrative & support | 2015 |
| Pet Partners Ltd | Health & social care | 2024 |
| Pete Storey Carpentry and Joinery Limited | Construction | 2018 |
| Peten Healthcare Services Ltd | Health & social care | 2025 |
| Peten Motor Services Ltd | Transport & logistics | 2026 |
| Peter a Tindall Yacht Surveys Limited | Professional & scientific | 2008 |
| Peter Barr Associates Limited | Professional & scientific | 2023 |
| Peter Flowerday Limited | Financial services | 2009 |
| Peter Foden Consultancy Limited | Administrative & support | 2003 |
| Peter Hughes Management Limited | Professional & scientific | 2024 |
| Peter Main 2013 Limited | Professional & scientific | 2012 |
| Peter Meats Limited | Wholesale & retail | 2021 |
| Peter Spencer Consultancy Limited | Professional & scientific | 2010 |
| Peter Starbuck Limited | Real estate | 1988 |
| Petes Home Services Limited | Other services | 2019 |
| Petherick & SON Holdings Ltd | Real estate | 2024 |
| Petru Delivery Ltd | Transport & logistics | 2022 |
| Petty Sessions Ltd | Hospitality | 2023 |
| Pettycoutxre Ltd | Wholesale & retail | 2023 |
| Pevgate Properties Limited | Education | 1977 |
| Pexit LLP | | 2019 |
| Pezmega Services Ltd | Health & social care | 2022 |
| PF Fireplaces and Chimney Sweeping Ltd | Administrative & support | 2020 |
| PFM Engineering Services Limited | Professional & scientific | 2011 |
| PFP Alliance Ltd | Construction | 2020 |
| PG Construction RK Ltd | Construction | 2023 |
| PG Funeral Director Ltd | Other services | 2025 |
| PH Building Services Ltd | Construction | 2025 |
| PH Cleaning Services Ltd | Administrative & support | 2023 |
| PH Designs Limited | Professional & scientific | 1995 |
| PH Investments Ltd | Real estate | 2024 |
| Phaire Consulting Limited | Construction | 2004 |
| Phantom Self Limited | Financial services | 2016 |
| Pharm Health Solutions Ltd | Wholesale & retail | 2024 |
| Pharm-Assist (UK) Ltd | Health & social care | 2012 |
| Pharm-Assist Direct Ltd | Wholesale & retail | 2023 |
| Pharma Complete Solutions Limited | Transport & logistics | 2024 |
| Pharma Health Solutions LLP | | 2013 |
| Pharma Solutions Services UK Ltd | Professional & scientific | 2023 |
| Pharmahdi Ltd | Health & social care | 2024 |
| Pharmahealth (Midlands) Limited | Wholesale & retail | 2019 |
| Pharmatrix Limited | Wholesale & retail | 2026 |
| Pharmav Limited | Professional & scientific | 2019 |
| Pharmhouse Ltd | Wholesale & retail | 2015 |
| Phase 31 Electrical Limited | Construction | 2021 |
| Phat Foodies Limited | Hospitality | 2026 |
| Phat Jacks Ltd | Hospitality | 2021 |
| PHD Derbyshire Ltd | Construction | 2016 |
| Phenoom Ltd | Extraterritorial | 2015 |
| Pheos Limited | Information & communication | 2025 |
| Phil Bowler Garage Services Limited | Wholesale & retail | 2003 |
| Phil Lynam Limited | Professional & scientific | 2015 |
| Phil Pickering Ltd | Professional & scientific | 2015 |
| Philby Limited | Agriculture & fishing | 2014 |
| Philip Adams Interiors Ltd | Construction | 2020 |
| Philip Foster Limited | Wholesale & retail | 1965 |
| Philipson Developments Limited | Real estate | 2026 |
| Phillips & Richardson Specialist Medical Consultancy Ltd | Professional & scientific | 2026 |
| Phillipsmanley Limited | Professional & scientific | 2026 |
| Philna Ltd | Health & social care | 2024 |
| Philnetty Ltd | Health & social care | 2015 |
| Phil’S Driving Limited | Transport & logistics | 2026 |
| Phlebotomy UK Limited | Health & social care | 2011 |
| Phmb Ltd | Hospitality | 2026 |
| Phmf Ltd | Real estate | 2025 |
| Phoenix 365 Care Services Ltd | Hospitality | 2025 |
| Phoenix Auto Haus Ltd | Wholesale & retail | 2026 |
| Phoenix Biocide Ltd | Professional & scientific | 2025 |
| Phoenix City Apartments Ltd | Real estate | 2023 |
| Phoenix Electrics (UK) Limited | Construction | 2014 |
| Phoenix Engineering Consultants Ltd | Professional & scientific | 2018 |
| Phoenix FTA Limited | Professional & scientific | 2018 |
| Phoenix General Medical Services Limited | Health & social care | 2019 |
| Phoenix Heating & Plumbing Services Ltd | Construction | 2019 |
| Phoenix Lettings and Property Management Limited | Real estate | 2016 |
| Phoenix Medexpress Ltd | Transport & logistics | 2026 |
| Phoenix Plumbing & Heating Limited | Construction | 2026 |
| Phoenix Properties (Derby) Limited | Real estate | 1980 |
| Phoenix Securities Services Ltd | Administrative & support | 2024 |
| Phoenix Site Solutions Limited | Construction | 2023 |
| Phone Gadgets by BM Ltd | Wholesale & retail | 2026 |
| Phone Planet Limited | Wholesale & retail | 2017 |
| Phoneline (M.C.D) Limited | Information & communication | 1998 |
| PHONETRADERS77 Limited | Other services | 2025 |
| Phoria Limited | Information & communication | 2010 |
| Physio Business Partners Ltd | Professional & scientific | 2026 |
| Physique Evolution Ltd | Arts & recreation | 2019 |
| PI Accommodations Ltd | Real estate | 2024 |
| Picfair Limited | Professional & scientific | 2013 |
| Pick Property Holdings Ltd | Real estate | 2023 |
| Pickstar Holdings Limited | Transport & logistics | 2025 |
| Pico Solutions Service Ltd | Administrative & support | 2025 |
| Picture Ville Limited | Real estate | 2002 |
| PIE Consultancy Limited | Information & communication | 2022 |
| Pieces of Time Limited | Wholesale & retail | 1984 |
| Pier Point Torquay Ltd | Hospitality | 2005 |