| Perry James Limited | Construction | 2015 |
| Perseus People Ltd | Administrative & support | 2017 |
| Personal Trading Concept Limited | Administrative & support | 2006 |
| Personal-Job Ltd. | Administrative & support | 2004 |
| Pet Chart Limited | Real estate | 2021 |
| Pete Coleman Auto Body Repairs Limited | Wholesale & retail | 2004 |
| Pete Miller Electrical Ltd | Construction | 2011 |
| Peter Rawson Agencies Ltd | Professional & scientific | 2010 |
| Petovate Ltd | Wholesale & retail | 2021 |
| Petri Holdings Limited | Professional & scientific | 2010 |
| Pezo Limited | Health & social care | 2007 |
| PF123 Limited | Other services | 2017 |
| PFS Devon Limited | Real estate | 2016 |
| PG Hire Limited | Other services | 2021 |
| Pharaoh's Finest Ltd | Wholesale & retail | 2022 |
| PHC Works Limited | Construction | 2026 |
| Phelips Court (Stoke SUB Hamdon) Management Company Limited | Households | 2022 |
| Phil ASH Decorators Limited | Construction | 2013 |
| Phil Swash Ltd | Professional & scientific | 2019 |
| Philip Derben Ltd | Professional & scientific | 2016 |
| Philipson Knowle Limited | Construction | 2014 |
| Phillips & Co.(Weston-Super-Mare)Limited | Real estate | 1924 |
| Phillips Barnes Environmental Ltd | Construction | 2022 |
| Phillips Barnes Merriott Ltd | Construction | 2026 |
| Phillips Construction Limited | Construction | 2007 |
| Philosothon UK Ltd | Education | 2019 |
| Phinotex Beheer Limited | Financial services | 2006 |
| Phoenix Court (Taunton) Management Company Limited | Households | 1989 |
| Phoenix House Larkhill Road Management Company Limited | Households | 2025 |
| Phoenix Kitchen (Somerset) Limited | Hospitality | 2021 |
| Phoenix Motorworks Ltd | Wholesale & retail | 2024 |
| Phoenix Refurbs Limited | Construction | 2015 |
| Phoenix Windows & Doors (SW) Ltd | Construction | 2017 |
| Phreatic Zone Ltd | Professional & scientific | 2015 |
| Phryge Items Ltd | Financial services | 2024 |
| Physio Access Limited | Health & social care | 1997 |
| PI Consultancy NL LLP | | 2015 |
| Piaggio Pizza Limited | Hospitality | 2024 |
| Piccolo Caffe Ltd | Hospitality | 2025 |
| Piccolo Foods Limited | Wholesale & retail | 2014 |
| Pick IT, Click IT Ltd | Wholesale & retail | 2023 |
| Pickering Developments (Cambridge) Limited | Construction | 2015 |
| Pickleballkidz Ltd | Arts & recreation | 2025 |
| Pickles Contracting Limited | Other services | 2025 |
| Pickles Investments Limited | Real estate | 2025 |
| Pickup Hydration Limited | Other services | 2025 |
| Pickwick Property Group Ltd | Real estate | 2025 |
| Pico Property Limited | Real estate | 2020 |
| Piedog Holdings Ltd | Financial services | 2022 |
| Pineapplecharm Ltd | Manufacturing | 2024 |
| Pink Ruby Ltd | Health & social care | 2024 |
| Pinkoom Limited | Health & social care | 2024 |
| Pinksmoor Farm Limited | Agriculture & fishing | 2005 |
| PIP and Paul Limited | Real estate | 2023 |
| Pipeline Creation Limited | Professional & scientific | 2023 |
| Pipes Court Management Limited | Households | 2023 |
| Pipplepen Farms Limited | Agriculture & fishing | 2009 |
| Pitch Gurus + Ltd | Wholesale & retail | 2025 |
| Pitch Perfect Consultancy Limited | Professional & scientific | 2024 |
| Pithers Court (Number Three) Commonhold Association Limited | Households | 2005 |
| Pithers Court (Number Two) Commonhold Association Limited | Households | 2005 |
| Pitliver Finance Company Limited | Financial services | 2021 |
| Pitliver Investco Holdings Limited | Financial services | 2021 |
| Pitliver Investment Company Limited | Financial services | 2021 |
| Pitliver Newco Limited | Financial services | 2021 |
| Pitliver Propco Holdings Limited | Financial services | 2021 |
| Pitliver Property Company Limited | Real estate | 2021 |
| Pixel Minds Ltd | Wholesale & retail | 2025 |
| Pixel Perfection Party Ltd | Professional & scientific | 2016 |
| Pixton Woodlands Limited | Administrative & support | 2013 |
| Pizza & Kebab Takeaway Limited | Hospitality | 2020 |
| PJB Capital Limited | Real estate | 2006 |
| PJC Logistics Specialists Limited | Transport & logistics | 2009 |
| Pjpw Limited | Real estate | 2022 |
| PK Group SW Electrical Limited | Construction | 2023 |
| PL 123 (SW) Limited | Information & communication | 2021 |
| PL25 Ltd | Hospitality | 2025 |
| Planet Flooring Ltd | Wholesale & retail | 2009 |
| Planet Industrials Limited | Wholesale & retail | 2020 |
| Plastron Training Ltd | Professional & scientific | 2021 |
| Plastron UK Ltd | Manufacturing | 2020 |
| Plato Estates Limited | Real estate | 1996 |
| Play Associates Limited | Construction | 2010 |
| Play U.K. (Playgrounds) Limited | Construction | 2003 |
| Play Wild C.I.C. | Arts & recreation | 2016 |
| Playbutton Studios Ltd | Arts & recreation | 2018 |
| PLB & Sons Limited | Real estate | 2025 |
| Pleasure Dome Theatre Company C.I.C. | Arts & recreation | 2016 |
| Plum Doughnut Limited | Real estate | 2024 |
| Plumbcall Ltd | Construction | 2005 |
| Plumbco. Renewables Ltd | Construction | 2023 |
| Plumbob Limited | Construction | 2016 |
| Plumbtech Somerset Ltd | Construction | 2019 |
| Plumley PUB Company Ltd | Other services | 2017 |
| Plumtree Property Investments Ltd | Households | 2009 |
| Plus One (South West) Limited | Health & social care | 2007 |
| Plusa Limited | Professional & scientific | 2025 |
| Plush Ventures Ltd | Wholesale & retail | 2015 |
| Plymouth City Centre Dental Practice Limited | Health & social care | 2012 |
| Plymouth Property Holdings Limited | Real estate | 2016 |