| Peaberry & Leaf Limited | Manufacturing | 2022 |
| Peach Commercial Consultancy Ltd | Professional & scientific | 2026 |
| Peach Portfolio Limited | Real estate | 2023 |
| Peach Ribbons Ltd | Wholesale & retail | 2025 |
| Peacock Plumbing & Heating Ltd | Construction | 2009 |
| Peanut Arms Ltd | Hospitality | 2024 |
| Peartree Bridge Ltd | Hospitality | 2013 |
| Peckham Investments London Limited | Financial services | 2017 |
| Pellmans (Eynsham) Limited | Professional & scientific | 2012 |
| Pellmans LLP | | 2012 |
| Pelltech Limited | Wholesale & retail | 1973 |
| Peloton Espresso Ltd | Hospitality | 2016 |
| Penguin Chippy Ltd | Hospitality | 2025 |
| Penhill Farm Sporting Club Ltd | Arts & recreation | 2026 |
| Pennadventure Limited | Arts & recreation | 2025 |
| Penndragon Limited | Extraterritorial | 2011 |
| Pennies From Heaven Fundraising Limited | Administrative & support | 1999 |
| People and Places International Ltd | Construction | 2002 |
| People Nudge Ltd | Administrative & support | 2019 |
| PER4MANCE Solutions Ltd | Professional & scientific | 2013 |
| Peregrine 2024 Limited | Professional & scientific | 2002 |
| Perihelion Holdings Ltd | Financial services | 2026 |
| Pest Solutions Oxfordshire Ltd | Administrative & support | 2010 |
| Pestigo UK Limited | Administrative & support | 2026 |
| Peter Harvey Music Limited | Administrative & support | 2015 |
| Peter Smith & SON Funeral Directors Ltd | Other services | 2015 |
| Peter Smith & SON Holdings Limited | Financial services | 2019 |
| Peter Stephens Training Limited | Professional & scientific | 2003 |
| Pethers of Burford Limited | Construction | 2011 |
| Phantom Frequency Ltd | Wholesale & retail | 2024 |
| Pharmal Limited | Wholesale & retail | 2025 |
| Pheasant Retreats Limited | Real estate | 2017 |
| Philip Barham Freelance Consulting Limited | Professional & scientific | 2011 |
| Philip Burton Limited | Professional & scientific | 2012 |
| Phimor Ltd | Administrative & support | 2020 |
| Phoenix Fire Technologies (UK) Limited | Construction | 2005 |
| Phoenix Mortgages Ltd | Financial services | 2017 |
| Phoenix Wealth Management Ltd. | Financial services | 1998 |
| Phonedna Ltd | Wholesale & retail | 2025 |
| Photonic Technologies UK Limited | Manufacturing | 2022 |
| Physically Fit Limited | Professional & scientific | 2006 |
| Pick Pack Plus Limited | Transport & logistics | 2020 |
| Piemac Limited | Construction | 2024 |
| Piercy Hardwoods Limited | Agriculture & fishing | 2003 |
| Pigotts Activities LLP | | 2020 |
| Pilsung Ltd | Administrative & support | 2022 |
| Pineapple Locations Limited | Administrative & support | 2015 |
| Pinnacle Bathrooms & Kitchens Direct Limited | Extraterritorial | 2022 |
| Pinnacle Engineering Services Limited | Professional & scientific | 2017 |
| Pinnacle Plumbing & Heating Direct Ltd | Construction | 2021 |
| Pinpoint Logistics Ltd | Extraterritorial | 2021 |
| Piper Heating Ltd | Construction | 1995 |
| Pirklova Limited | Health & social care | 2014 |
| Pitstop Limited | Wholesale & retail | 2001 |
| Pivotal Scientific Limited | Professional & scientific | 2008 |
| Pizza Slices and More Ltd | Hospitality | 2025 |
| PJ Allan Ltd | Health & social care | 2022 |
| PJ Foster Limited | Education | 2023 |
| PJ Hare Limited | Manufacturing | 2021 |
| Pjcl Medical Limited | Health & social care | 2025 |
| PKC Electrical Limited | Construction | 2006 |
| Placeholder Holdings Ltd | Extraterritorial | 2017 |
| Plan G Technology Ltd | Information & communication | 2023 |
| Plan.Coach.Succeed, Ltd. | Professional & scientific | 2003 |
| Planet Springwell Ltd | Arts & recreation | 2022 |
| Plaudit Agency Ltd | Professional & scientific | 2022 |
| Playroom Education Limited | Education | 2026 |
| Plex Interiors Limited | Construction | 2023 |
| Plexus Advanced Engineering Ltd | Manufacturing | 2020 |
| Plexus Composites Ltd | Manufacturing | 2019 |
| PLL Business Solutions Limited | Professional & scientific | 2008 |
| Plotsensor Ltd | Manufacturing | 2019 |
| Plough Food and Drink Ltd | Hospitality | 2020 |
| Plum Lane Limited | Financial services | 2020 |
| Plus Technologies Limited | Information & communication | 1998 |
| Pluto Creates Here Ltd | Professional & scientific | 2022 |
| PMP Building Management Limited | Real estate | 2006 |
| PNK Drinks Ltd | Wholesale & retail | 2025 |
| Poffley END Property Ltd | Real estate | 2025 |
| Point Break Partners Limited | Financial services | 2025 |
| POINT5 Ltd | Other services | 2016 |
| Political Quarterly Publishing Company Limited(The) | Information & communication | 1930 |
| Polyflex Limited | Administrative & support | 2025 |
| Polygon Productions Ltd | Professional & scientific | 2018 |
| Polyhedron Software & Services Ltd | Wholesale & retail | 2015 |
| Polyhedron Solutions Limited | Information & communication | 2014 |
| Polythene (UK) Limited | Administrative & support | 2007 |
| Pomelo Ltd | Professional & scientific | 2024 |
| Popsicle Typing Limited | Administrative & support | 2011 |
| Populaire Limited | Information & communication | 2016 |
| Popupentz Limited | Professional & scientific | 2022 |
| Portland House Bourton Ltd | Hospitality | 2025 |
| Portland Oxford Limited | Real estate | 2011 |
| Portobello Property Developments Limited | Construction | 2021 |
| Portobello Property Holdings Limited | Financial services | 2021 |
| Pose AR Limited | Information & communication | 2019 |
| Potted Goose PUB Co Limited | Financial services | 2023 |
| Poulton Technologies Limited | Manufacturing | 2013 |
| Power Harvest Infrastructure Ltd | Professional & scientific | 2022 |
| Powerstop Brakes Limited | Professional & scientific | 2001 |