| Proenc Limited | Manufacturing | 2014 |
| Professional Builders Merchants (Glos) Ltd | Wholesale & retail | 2023 |
| Professional Delivery Consortium Limited | Information & communication | 2026 |
| Professional Plumbing Solutions Limited | Administrative & support | 2015 |
| Professional Services Recruitment Limited | Professional & scientific | 2026 |
| Progeny Systems & Consultants Ltd | Information & communication | 2000 |
| Progress I.T. | | 2000 |
| Prohawk Solutions Limited | Information & communication | 2009 |
| Project Campers Ltd | Manufacturing | 2023 |
| Project Dave Ltd | Administrative & support | 2026 |
| Project DGL Ltd | Professional & scientific | 2023 |
| Project Horton Watson Limited | Real estate | 2024 |
| Project M Developments Limited | Real estate | 2025 |
| Project Managed Limited | Professional & scientific | 2007 |
| Project Pioneers CIC | Information & communication | 2022 |
| Project Plumbing Ltd | Construction | 2024 |
| Project Security UK Ltd | Administrative & support | 2005 |
| Project Toronto Topco Limited | Financial services | 2026 |
| Projectsbysmith Limited | Professional & scientific | 2026 |
| Projectshare Alliance Ltd | Information & communication | 2025 |
| Projentix LLP | | 2026 |
| Projex Cellular Infrastructure UK Limited | Information & communication | 2011 |
| Projex Ventures Limited | Information & communication | 2022 |
| Prom Spice Limited | Hospitality | 2025 |
| Promenade Apartments Ltd | Real estate | 2012 |
| Promenade Photosetting Limited | Manufacturing | 1978 |
| Promenade Property Investments Limited | Real estate | 2016 |
| Promenade Trustee Company Limited | Administrative & support | 2001 |
| Prominent T LS Limited | Professional & scientific | 2019 |
| Proper Artisan Ltd | Hospitality | 2025 |
| Proper Molds Ltd | Manufacturing | 2023 |
| Proper Pizza and Pasta Ltd | Hospitality | 2019 |
| Properties BR Ltd | Hospitality | 2022 |
| Property 1001 Limited | Real estate | 2023 |
| Property 99 Limited | Real estate | 2019 |
| Property and Finance Solutions Ltd | Financial services | 2019 |
| Property Box Associates Ltd | Real estate | 2019 |
| Property by Luke Heyden Limited | Real estate | 2021 |
| Property by Pinnacle Ltd | Construction | 2023 |
| Property Holdings Group Limited | Financial services | 2015 |
| Property Investments R&B Limited | Professional & scientific | 2015 |
| Property Investors Maintenance Limited | Construction | 2018 |
| Property Maintenance Guru Ltd | Administrative & support | 2020 |
| Property Management South West Ltd | Real estate | 2026 |
| Property Nomad Ltd | Real estate | 2024 |
| Property Search Co (Cotswolds) Ltd | Real estate | 2022 |
| Property Solutions (Ledbury) Limited | Real estate | 2004 |
| Propertyology Partnership Limited | Real estate | 2018 |
| Propwise Services Limited | Real estate | 2024 |
| Proquote Limited | Information & communication | 1999 |
| Prose Holdings Ltd | Households | 2024 |
| Prosec Monitoring Limited | Administrative & support | 2015 |
| Prospect Builders Ltd | Construction | 2007 |
| Prospect Home Solutions Ltd | Professional & scientific | 2025 |
| Prosystems Health and Education CIC | Education | 2015 |
| Protea Hygiene Limited | Health & social care | 2023 |
| Protec Medical Limited | Wholesale & retail | 2001 |
| Protect Industries Ltd | Administrative & support | 2024 |
| Protection Express Limited | Extraterritorial | 1990 |
| Protempo Limited | Professional & scientific | 2012 |
| Provac ETS Ltd | Energy | 2026 |
| Provantage Procurement Limited | Administrative & support | 2013 |
| Provargo Properties Limited | Households | 2020 |
| PRP Global Limited | Professional & scientific | 2019 |
| Prufrock Investment Limited | Real estate | 2017 |
| PRY1001 Limited | Administrative & support | 2023 |
| Przybyl Ltd | Manufacturing | 2026 |
| PSA BG Holding Ltd | Construction | 2024 |
| PSA Care Services Ltd | Financial services | 2020 |
| PSC Autocentres Ltd | Wholesale & retail | 2013 |
| Psite Ltd | Professional & scientific | 2022 |
| PSK Cheltenham Ltd | Professional & scientific | 2020 |
| PSM Associates Limited | Construction | 2015 |
| Psychoanalytic Psychotherapy Consultants Ltd | Health & social care | 2021 |
| PT (Cheltenham) Ltd. | Professional & scientific | 2023 |
| PT (Thames Valley) Ltd. | Professional & scientific | 2023 |
| PT Medicolegal Ltd | Professional & scientific | 2025 |
| Ptcg World Ltd | Wholesale & retail | 2021 |
| Pten Research Foundation | Professional & scientific | 2016 |
| Pthh Ltd | Hospitality | 2022 |
| Public Hearts Defibrillator Campaign CIC | Health & social care | 2024 |
| Puddles Nursery Limited | Extraterritorial | 2010 |
| PUK Holdings Limited | Professional & scientific | 2003 |
| PUK Limited | Manufacturing | 1969 |
| Pukka Plastering Limited | Construction | 2022 |
| Pulham & Anderson Properties Limited | Real estate | 2026 |
| Pulse Technologies Ltd | Information & communication | 2026 |
| Pumphreys Court Management Limited | Households | 1989 |
| Punt. Crowds. Sweep. Ltd | Households | 2022 |
| Pupil Assessment Support Services Limited | Education | 2018 |
| Pure Aviation Support Services Limited | Manufacturing | 2013 |
| Pure Cheltenham Honey Ltd | Hospitality | 2023 |
| Pure Dental Care Limited | Health & social care | 2006 |
| Pure Ecology Limited | Professional & scientific | 2014 |
| Pure Living (GB) Limited | Households | 2006 |
| Purecove Ltd | Administrative & support | 2009 |
| Purelands Acupuncture Ltd | Health & social care | 2024 |
| Purelite Testing Limited | Hospitality | 2025 |
| Purlieus Consulting Limited | Administrative & support | 2012 |
| Purple Boxes Ltd | Administrative & support | 2021 |